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include/mbedtls/ssl.h@1:1a219dea6cb5, 2019-06-04 (annotated)

Committer:: williequesada
Date:: Tue Jun 04 16:03:38 2019 +0000
Revision:: 1:1a219dea6cb5
Parent:: 0:cdf462088d13

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User	Revision	Line number	New contents of line
markrad	0:cdf462088d13	1	/**
markrad	0:cdf462088d13	2	* \file ssl.h
markrad	0:cdf462088d13	3	*
markrad	0:cdf462088d13	4	* \brief SSL/TLS functions.
markrad	0:cdf462088d13	5	*
markrad	0:cdf462088d13	6	* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
markrad	0:cdf462088d13	7	* SPDX-License-Identifier: Apache-2.0
markrad	0:cdf462088d13	8	*
markrad	0:cdf462088d13	9	* Licensed under the Apache License, Version 2.0 (the "License"); you may
markrad	0:cdf462088d13	10	* not use this file except in compliance with the License.
markrad	0:cdf462088d13	11	* You may obtain a copy of the License at
markrad	0:cdf462088d13	12	*
markrad	0:cdf462088d13	13	* http://www.apache.org/licenses/LICENSE-2.0
markrad	0:cdf462088d13	14	*
markrad	0:cdf462088d13	15	* Unless required by applicable law or agreed to in writing, software
markrad	0:cdf462088d13	16	* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
markrad	0:cdf462088d13	17	* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
markrad	0:cdf462088d13	18	* See the License for the specific language governing permissions and
markrad	0:cdf462088d13	19	* limitations under the License.
markrad	0:cdf462088d13	20	*
markrad	0:cdf462088d13	21	* This file is part of mbed TLS (https://tls.mbed.org)
markrad	0:cdf462088d13	22	*/
markrad	0:cdf462088d13	23	#ifndef MBEDTLS_SSL_H
markrad	0:cdf462088d13	24	#define MBEDTLS_SSL_H
markrad	0:cdf462088d13	25
markrad	0:cdf462088d13	26	#if !defined(MBEDTLS_CONFIG_FILE)
markrad	0:cdf462088d13	27	#include "config.h"
markrad	0:cdf462088d13	28	#else
markrad	0:cdf462088d13	29	#include MBEDTLS_CONFIG_FILE
markrad	0:cdf462088d13	30	#endif
markrad	0:cdf462088d13	31
markrad	0:cdf462088d13	32	#include "bignum.h"
markrad	0:cdf462088d13	33	#include "ecp.h"
markrad	0:cdf462088d13	34
markrad	0:cdf462088d13	35	#include "ssl_ciphersuites.h"
markrad	0:cdf462088d13	36
markrad	0:cdf462088d13	37	#if defined(MBEDTLS_X509_CRT_PARSE_C)
markrad	0:cdf462088d13	38	#include "x509_crt.h"
markrad	0:cdf462088d13	39	#include "x509_crl.h"
markrad	0:cdf462088d13	40	#endif
markrad	0:cdf462088d13	41
markrad	0:cdf462088d13	42	#if defined(MBEDTLS_DHM_C)
markrad	0:cdf462088d13	43	#include "dhm.h"
markrad	0:cdf462088d13	44	#endif
markrad	0:cdf462088d13	45
markrad	0:cdf462088d13	46	#if defined(MBEDTLS_ECDH_C)
markrad	0:cdf462088d13	47	#include "ecdh.h"
markrad	0:cdf462088d13	48	#endif
markrad	0:cdf462088d13	49
markrad	0:cdf462088d13	50	#if defined(MBEDTLS_ZLIB_SUPPORT)
markrad	0:cdf462088d13	51	#include "zlib.h"
markrad	0:cdf462088d13	52	#endif
markrad	0:cdf462088d13	53
markrad	0:cdf462088d13	54	#if defined(MBEDTLS_HAVE_TIME)
markrad	0:cdf462088d13	55	#include "mbedtls/platform_time.h"
markrad	0:cdf462088d13	56	#endif
markrad	0:cdf462088d13	57
markrad	0:cdf462088d13	58	/*
markrad	0:cdf462088d13	59	* SSL Error codes
markrad	0:cdf462088d13	60	*/
markrad	0:cdf462088d13	61	#define MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE -0x7080 /*< The requested feature is not available. /
markrad	0:cdf462088d13	62	#define MBEDTLS_ERR_SSL_BAD_INPUT_DATA -0x7100 /*< Bad input parameters to function. /
markrad	0:cdf462088d13	63	#define MBEDTLS_ERR_SSL_INVALID_MAC -0x7180 /*< Verification of the message MAC failed. /
markrad	0:cdf462088d13	64	#define MBEDTLS_ERR_SSL_INVALID_RECORD -0x7200 /*< An invalid SSL record was received. /
markrad	0:cdf462088d13	65	#define MBEDTLS_ERR_SSL_CONN_EOF -0x7280 /*< The connection indicated an EOF. /
markrad	0:cdf462088d13	66	#define MBEDTLS_ERR_SSL_UNKNOWN_CIPHER -0x7300 /*< An unknown cipher was received. /
markrad	0:cdf462088d13	67	#define MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN -0x7380 /*< The server has no ciphersuites in common with the client. /
markrad	0:cdf462088d13	68	#define MBEDTLS_ERR_SSL_NO_RNG -0x7400 /*< No RNG was provided to the SSL module. /
markrad	0:cdf462088d13	69	#define MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE -0x7480 /*< No client certification received from the client, but required by the authentication mode. /
markrad	0:cdf462088d13	70	#define MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE -0x7500 /*< Our own certificate(s) is/are too large to send in an SSL message. /
markrad	0:cdf462088d13	71	#define MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED -0x7580 /*< The own certificate is not set, but needed by the server. /
markrad	0:cdf462088d13	72	#define MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED -0x7600 /*< The own private key or pre-shared key is not set, but needed. /
markrad	0:cdf462088d13	73	#define MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED -0x7680 /*< No CA Chain is set, but required to operate. /
markrad	0:cdf462088d13	74	#define MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE -0x7700 /*< An unexpected message was received from our peer. /
markrad	0:cdf462088d13	75	#define MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE -0x7780 /*< A fatal alert message was received from our peer. /
markrad	0:cdf462088d13	76	#define MBEDTLS_ERR_SSL_PEER_VERIFY_FAILED -0x7800 /*< Verification of our peer failed. /
markrad	0:cdf462088d13	77	#define MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY -0x7880 /*< The peer notified us that the connection is going to be closed. /
markrad	0:cdf462088d13	78	#define MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO -0x7900 /*< Processing of the ClientHello handshake message failed. /
markrad	0:cdf462088d13	79	#define MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO -0x7980 /*< Processing of the ServerHello handshake message failed. /
markrad	0:cdf462088d13	80	#define MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE -0x7A00 /*< Processing of the Certificate handshake message failed. /
markrad	0:cdf462088d13	81	#define MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST -0x7A80 /*< Processing of the CertificateRequest handshake message failed. /
markrad	0:cdf462088d13	82	#define MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE -0x7B00 /*< Processing of the ServerKeyExchange handshake message failed. /
markrad	0:cdf462088d13	83	#define MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO_DONE -0x7B80 /*< Processing of the ServerHelloDone handshake message failed. /
markrad	0:cdf462088d13	84	#define MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE -0x7C00 /*< Processing of the ClientKeyExchange handshake message failed. /
markrad	0:cdf462088d13	85	#define MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_RP -0x7C80 /*< Processing of the ClientKeyExchange handshake message failed in DHM / ECDH Read Public. /
markrad	0:cdf462088d13	86	#define MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_CS -0x7D00 /*< Processing of the ClientKeyExchange handshake message failed in DHM / ECDH Calculate Secret. /
markrad	0:cdf462088d13	87	#define MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY -0x7D80 /*< Processing of the CertificateVerify handshake message failed. /
markrad	0:cdf462088d13	88	#define MBEDTLS_ERR_SSL_BAD_HS_CHANGE_CIPHER_SPEC -0x7E00 /*< Processing of the ChangeCipherSpec handshake message failed. /
markrad	0:cdf462088d13	89	#define MBEDTLS_ERR_SSL_BAD_HS_FINISHED -0x7E80 /*< Processing of the Finished handshake message failed. /
markrad	0:cdf462088d13	90	#define MBEDTLS_ERR_SSL_ALLOC_FAILED -0x7F00 /*< Memory allocation failed /
markrad	0:cdf462088d13	91	#define MBEDTLS_ERR_SSL_HW_ACCEL_FAILED -0x7F80 /*< Hardware acceleration function returned with error /
markrad	0:cdf462088d13	92	#define MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH -0x6F80 /*< Hardware acceleration function skipped / left alone data /
markrad	0:cdf462088d13	93	#define MBEDTLS_ERR_SSL_COMPRESSION_FAILED -0x6F00 /*< Processing of the compression / decompression failed /
markrad	0:cdf462088d13	94	#define MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION -0x6E80 /*< Handshake protocol not within min/max boundaries /
markrad	0:cdf462088d13	95	#define MBEDTLS_ERR_SSL_BAD_HS_NEW_SESSION_TICKET -0x6E00 /*< Processing of the NewSessionTicket handshake message failed. /
markrad	0:cdf462088d13	96	#define MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED -0x6D80 /*< Session ticket has expired. /
markrad	0:cdf462088d13	97	#define MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH -0x6D00 /*< Public key type mismatch (eg, asked for RSA key exchange and presented EC key) /
markrad	0:cdf462088d13	98	#define MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY -0x6C80 /*< Unknown identity received (eg, PSK identity) /
markrad	0:cdf462088d13	99	#define MBEDTLS_ERR_SSL_INTERNAL_ERROR -0x6C00 /*< Internal error (eg, unexpected failure in lower-level module) /
markrad	0:cdf462088d13	100	#define MBEDTLS_ERR_SSL_COUNTER_WRAPPING -0x6B80 /*< A counter would wrap (eg, too many messages exchanged). /
markrad	0:cdf462088d13	101	#define MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO -0x6B00 /*< Unexpected message at ServerHello in renegotiation. /
markrad	0:cdf462088d13	102	#define MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED -0x6A80 /*< DTLS client must retry for hello verification /
markrad	0:cdf462088d13	103	#define MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL -0x6A00 /*< A buffer is too small to receive or write a message /
markrad	0:cdf462088d13	104	#define MBEDTLS_ERR_SSL_NO_USABLE_CIPHERSUITE -0x6980 /*< None of the common ciphersuites is usable (eg, no suitable certificate, see debug messages). /
markrad	0:cdf462088d13	105	#define MBEDTLS_ERR_SSL_WANT_READ -0x6900 /*< Connection requires a read call. /
markrad	0:cdf462088d13	106	#define MBEDTLS_ERR_SSL_WANT_WRITE -0x6880 /*< Connection requires a write call. /
markrad	0:cdf462088d13	107	#define MBEDTLS_ERR_SSL_TIMEOUT -0x6800 /*< The operation timed out. /
markrad	0:cdf462088d13	108	#define MBEDTLS_ERR_SSL_CLIENT_RECONNECT -0x6780 /*< The client initiated a reconnect from the same port. /
markrad	0:cdf462088d13	109	#define MBEDTLS_ERR_SSL_UNEXPECTED_RECORD -0x6700 /*< Record header looks valid but is not expected. /
markrad	0:cdf462088d13	110	#define MBEDTLS_ERR_SSL_NON_FATAL -0x6680 /*< The alert message received indicates a non-fatal error. /
markrad	0:cdf462088d13	111	#define MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH -0x6600 /*< Couldn't set the hash for verifying CertificateVerify /
markrad	0:cdf462088d13	112
markrad	0:cdf462088d13	113	/*
markrad	0:cdf462088d13	114	* Various constants
markrad	0:cdf462088d13	115	*/
markrad	0:cdf462088d13	116	#define MBEDTLS_SSL_MAJOR_VERSION_3 3
markrad	0:cdf462088d13	117	#define MBEDTLS_SSL_MINOR_VERSION_0 0 /!< SSL v3.0 /
markrad	0:cdf462088d13	118	#define MBEDTLS_SSL_MINOR_VERSION_1 1 /!< TLS v1.0 /
markrad	0:cdf462088d13	119	#define MBEDTLS_SSL_MINOR_VERSION_2 2 /!< TLS v1.1 /
markrad	0:cdf462088d13	120	#define MBEDTLS_SSL_MINOR_VERSION_3 3 /!< TLS v1.2 /
markrad	0:cdf462088d13	121
markrad	0:cdf462088d13	122	#define MBEDTLS_SSL_TRANSPORT_STREAM 0 /!< TLS /
markrad	0:cdf462088d13	123	#define MBEDTLS_SSL_TRANSPORT_DATAGRAM 1 /!< DTLS /
markrad	0:cdf462088d13	124
markrad	0:cdf462088d13	125	#define MBEDTLS_SSL_MAX_HOST_NAME_LEN 255 /!< Maximum host name defined in RFC 1035 /
markrad	0:cdf462088d13	126
markrad	0:cdf462088d13	127	/* RFC 6066 section 4, see also mfl_code_to_length in ssl_tls.c
markrad	0:cdf462088d13	128	* NONE must be zero so that memset()ing structure to zero works */
markrad	0:cdf462088d13	129	#define MBEDTLS_SSL_MAX_FRAG_LEN_NONE 0 /!< don't use this extension /
markrad	0:cdf462088d13	130	#define MBEDTLS_SSL_MAX_FRAG_LEN_512 1 /!< MaxFragmentLength 2^9 /
markrad	0:cdf462088d13	131	#define MBEDTLS_SSL_MAX_FRAG_LEN_1024 2 /!< MaxFragmentLength 2^10 /
markrad	0:cdf462088d13	132	#define MBEDTLS_SSL_MAX_FRAG_LEN_2048 3 /!< MaxFragmentLength 2^11 /
markrad	0:cdf462088d13	133	#define MBEDTLS_SSL_MAX_FRAG_LEN_4096 4 /!< MaxFragmentLength 2^12 /
markrad	0:cdf462088d13	134	#define MBEDTLS_SSL_MAX_FRAG_LEN_INVALID 5 /!< first invalid value /
markrad	0:cdf462088d13	135
markrad	0:cdf462088d13	136	#define MBEDTLS_SSL_IS_CLIENT 0
markrad	0:cdf462088d13	137	#define MBEDTLS_SSL_IS_SERVER 1
markrad	0:cdf462088d13	138
markrad	0:cdf462088d13	139	#define MBEDTLS_SSL_IS_NOT_FALLBACK 0
markrad	0:cdf462088d13	140	#define MBEDTLS_SSL_IS_FALLBACK 1
markrad	0:cdf462088d13	141
markrad	0:cdf462088d13	142	#define MBEDTLS_SSL_EXTENDED_MS_DISABLED 0
markrad	0:cdf462088d13	143	#define MBEDTLS_SSL_EXTENDED_MS_ENABLED 1
markrad	0:cdf462088d13	144
markrad	0:cdf462088d13	145	#define MBEDTLS_SSL_ETM_DISABLED 0
markrad	0:cdf462088d13	146	#define MBEDTLS_SSL_ETM_ENABLED 1
markrad	0:cdf462088d13	147
markrad	0:cdf462088d13	148	#define MBEDTLS_SSL_COMPRESS_NULL 0
markrad	0:cdf462088d13	149	#define MBEDTLS_SSL_COMPRESS_DEFLATE 1
markrad	0:cdf462088d13	150
markrad	0:cdf462088d13	151	#define MBEDTLS_SSL_VERIFY_NONE 0
markrad	0:cdf462088d13	152	#define MBEDTLS_SSL_VERIFY_OPTIONAL 1
markrad	0:cdf462088d13	153	#define MBEDTLS_SSL_VERIFY_REQUIRED 2
markrad	0:cdf462088d13	154	#define MBEDTLS_SSL_VERIFY_UNSET 3 /* Used only for sni_authmode */
markrad	0:cdf462088d13	155
markrad	0:cdf462088d13	156	#define MBEDTLS_SSL_LEGACY_RENEGOTIATION 0
markrad	0:cdf462088d13	157	#define MBEDTLS_SSL_SECURE_RENEGOTIATION 1
markrad	0:cdf462088d13	158
markrad	0:cdf462088d13	159	#define MBEDTLS_SSL_RENEGOTIATION_DISABLED 0
markrad	0:cdf462088d13	160	#define MBEDTLS_SSL_RENEGOTIATION_ENABLED 1
markrad	0:cdf462088d13	161
markrad	0:cdf462088d13	162	#define MBEDTLS_SSL_ANTI_REPLAY_DISABLED 0
markrad	0:cdf462088d13	163	#define MBEDTLS_SSL_ANTI_REPLAY_ENABLED 1
markrad	0:cdf462088d13	164
markrad	0:cdf462088d13	165	#define MBEDTLS_SSL_RENEGOTIATION_NOT_ENFORCED -1
markrad	0:cdf462088d13	166	#define MBEDTLS_SSL_RENEGO_MAX_RECORDS_DEFAULT 16
markrad	0:cdf462088d13	167
markrad	0:cdf462088d13	168	#define MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION 0
markrad	0:cdf462088d13	169	#define MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION 1
markrad	0:cdf462088d13	170	#define MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE 2
markrad	0:cdf462088d13	171
markrad	0:cdf462088d13	172	#define MBEDTLS_SSL_TRUNC_HMAC_DISABLED 0
markrad	0:cdf462088d13	173	#define MBEDTLS_SSL_TRUNC_HMAC_ENABLED 1
markrad	0:cdf462088d13	174	#define MBEDTLS_SSL_TRUNCATED_HMAC_LEN 10 /* 80 bits, rfc 6066 section 7 */
markrad	0:cdf462088d13	175
markrad	0:cdf462088d13	176	#define MBEDTLS_SSL_SESSION_TICKETS_DISABLED 0
markrad	0:cdf462088d13	177	#define MBEDTLS_SSL_SESSION_TICKETS_ENABLED 1
markrad	0:cdf462088d13	178
markrad	0:cdf462088d13	179	#define MBEDTLS_SSL_CBC_RECORD_SPLITTING_DISABLED 0
markrad	0:cdf462088d13	180	#define MBEDTLS_SSL_CBC_RECORD_SPLITTING_ENABLED 1
markrad	0:cdf462088d13	181
markrad	0:cdf462088d13	182	#define MBEDTLS_SSL_ARC4_ENABLED 0
markrad	0:cdf462088d13	183	#define MBEDTLS_SSL_ARC4_DISABLED 1
markrad	0:cdf462088d13	184
markrad	0:cdf462088d13	185	#define MBEDTLS_SSL_PRESET_DEFAULT 0
markrad	0:cdf462088d13	186	#define MBEDTLS_SSL_PRESET_SUITEB 2
markrad	0:cdf462088d13	187
markrad	0:cdf462088d13	188	/*
markrad	0:cdf462088d13	189	* Default range for DTLS retransmission timer value, in milliseconds.
markrad	0:cdf462088d13	190	* RFC 6347 4.2.4.1 says from 1 second to 60 seconds.
markrad	0:cdf462088d13	191	*/
markrad	0:cdf462088d13	192	#define MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MIN 1000
markrad	0:cdf462088d13	193	#define MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MAX 60000
markrad	0:cdf462088d13	194
markrad	0:cdf462088d13	195	/**
markrad	0:cdf462088d13	196	* \name SECTION: Module settings
markrad	0:cdf462088d13	197	*
markrad	0:cdf462088d13	198	* The configuration options you can set for this module are in this section.
markrad	0:cdf462088d13	199	* Either change them in config.h or define them on the compiler command line.
markrad	0:cdf462088d13	200	* \{
markrad	0:cdf462088d13	201	*/
markrad	0:cdf462088d13	202
markrad	0:cdf462088d13	203	#if !defined(MBEDTLS_SSL_DEFAULT_TICKET_LIFETIME)
markrad	0:cdf462088d13	204	#define MBEDTLS_SSL_DEFAULT_TICKET_LIFETIME 86400 /*< Lifetime of session tickets (if enabled) /
markrad	0:cdf462088d13	205	#endif
markrad	0:cdf462088d13	206
markrad	0:cdf462088d13	207	/*
markrad	0:cdf462088d13	208	* Maxium fragment length in bytes,
markrad	0:cdf462088d13	209	* determines the size of each of the two internal I/O buffers.
markrad	0:cdf462088d13	210	*
markrad	0:cdf462088d13	211	* Note: the RFC defines the default size of SSL / TLS messages. If you
markrad	0:cdf462088d13	212	* change the value here, other clients / servers may not be able to
markrad	0:cdf462088d13	213	* communicate with you anymore. Only change this value if you control
markrad	0:cdf462088d13	214	* both sides of the connection and have it reduced at both sides, or
markrad	0:cdf462088d13	215	* if you're using the Max Fragment Length extension and you know all your
markrad	0:cdf462088d13	216	* peers are using it too!
markrad	0:cdf462088d13	217	*/
markrad	0:cdf462088d13	218	#if !defined(MBEDTLS_SSL_MAX_CONTENT_LEN)
markrad	0:cdf462088d13	219	#define MBEDTLS_SSL_MAX_CONTENT_LEN 16384 /*< Size of the input / output buffer /
markrad	0:cdf462088d13	220	#endif
markrad	0:cdf462088d13	221
markrad	0:cdf462088d13	222	/* \} name SECTION: Module settings */
markrad	0:cdf462088d13	223
markrad	0:cdf462088d13	224	/*
markrad	0:cdf462088d13	225	* Length of the verify data for secure renegotiation
markrad	0:cdf462088d13	226	*/
markrad	0:cdf462088d13	227	#if defined(MBEDTLS_SSL_PROTO_SSL3)
markrad	0:cdf462088d13	228	#define MBEDTLS_SSL_VERIFY_DATA_MAX_LEN 36
markrad	0:cdf462088d13	229	#else
markrad	0:cdf462088d13	230	#define MBEDTLS_SSL_VERIFY_DATA_MAX_LEN 12
markrad	0:cdf462088d13	231	#endif
markrad	0:cdf462088d13	232
markrad	0:cdf462088d13	233	/*
markrad	0:cdf462088d13	234	* Signaling ciphersuite values (SCSV)
markrad	0:cdf462088d13	235	*/
markrad	0:cdf462088d13	236	#define MBEDTLS_SSL_EMPTY_RENEGOTIATION_INFO 0xFF /*< renegotiation info ext /
markrad	0:cdf462088d13	237	#define MBEDTLS_SSL_FALLBACK_SCSV_VALUE 0x5600 /*< RFC 7507 section 2 /
markrad	0:cdf462088d13	238
markrad	0:cdf462088d13	239	/*
markrad	0:cdf462088d13	240	* Supported Signature and Hash algorithms (For TLS 1.2)
markrad	0:cdf462088d13	241	* RFC 5246 section 7.4.1.4.1
markrad	0:cdf462088d13	242	*/
markrad	0:cdf462088d13	243	#define MBEDTLS_SSL_HASH_NONE 0
markrad	0:cdf462088d13	244	#define MBEDTLS_SSL_HASH_MD5 1
markrad	0:cdf462088d13	245	#define MBEDTLS_SSL_HASH_SHA1 2
markrad	0:cdf462088d13	246	#define MBEDTLS_SSL_HASH_SHA224 3
markrad	0:cdf462088d13	247	#define MBEDTLS_SSL_HASH_SHA256 4
markrad	0:cdf462088d13	248	#define MBEDTLS_SSL_HASH_SHA384 5
markrad	0:cdf462088d13	249	#define MBEDTLS_SSL_HASH_SHA512 6
markrad	0:cdf462088d13	250
markrad	0:cdf462088d13	251	#define MBEDTLS_SSL_SIG_ANON 0
markrad	0:cdf462088d13	252	#define MBEDTLS_SSL_SIG_RSA 1
markrad	0:cdf462088d13	253	#define MBEDTLS_SSL_SIG_ECDSA 3
markrad	0:cdf462088d13	254
markrad	0:cdf462088d13	255	/*
markrad	0:cdf462088d13	256	* Client Certificate Types
markrad	0:cdf462088d13	257	* RFC 5246 section 7.4.4 plus RFC 4492 section 5.5
markrad	0:cdf462088d13	258	*/
markrad	0:cdf462088d13	259	#define MBEDTLS_SSL_CERT_TYPE_RSA_SIGN 1
markrad	0:cdf462088d13	260	#define MBEDTLS_SSL_CERT_TYPE_ECDSA_SIGN 64
markrad	0:cdf462088d13	261
markrad	0:cdf462088d13	262	/*
markrad	0:cdf462088d13	263	* Message, alert and handshake types
markrad	0:cdf462088d13	264	*/
markrad	0:cdf462088d13	265	#define MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC 20
markrad	0:cdf462088d13	266	#define MBEDTLS_SSL_MSG_ALERT 21
markrad	0:cdf462088d13	267	#define MBEDTLS_SSL_MSG_HANDSHAKE 22
markrad	0:cdf462088d13	268	#define MBEDTLS_SSL_MSG_APPLICATION_DATA 23
markrad	0:cdf462088d13	269
markrad	0:cdf462088d13	270	#define MBEDTLS_SSL_ALERT_LEVEL_WARNING 1
markrad	0:cdf462088d13	271	#define MBEDTLS_SSL_ALERT_LEVEL_FATAL 2
markrad	0:cdf462088d13	272
markrad	0:cdf462088d13	273	#define MBEDTLS_SSL_ALERT_MSG_CLOSE_NOTIFY 0 /* 0x00 */
markrad	0:cdf462088d13	274	#define MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE 10 /* 0x0A */
markrad	0:cdf462088d13	275	#define MBEDTLS_SSL_ALERT_MSG_BAD_RECORD_MAC 20 /* 0x14 */
markrad	0:cdf462088d13	276	#define MBEDTLS_SSL_ALERT_MSG_DECRYPTION_FAILED 21 /* 0x15 */
markrad	0:cdf462088d13	277	#define MBEDTLS_SSL_ALERT_MSG_RECORD_OVERFLOW 22 /* 0x16 */
markrad	0:cdf462088d13	278	#define MBEDTLS_SSL_ALERT_MSG_DECOMPRESSION_FAILURE 30 /* 0x1E */
markrad	0:cdf462088d13	279	#define MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE 40 /* 0x28 */
markrad	0:cdf462088d13	280	#define MBEDTLS_SSL_ALERT_MSG_NO_CERT 41 /* 0x29 */
markrad	0:cdf462088d13	281	#define MBEDTLS_SSL_ALERT_MSG_BAD_CERT 42 /* 0x2A */
markrad	0:cdf462088d13	282	#define MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT 43 /* 0x2B */
markrad	0:cdf462088d13	283	#define MBEDTLS_SSL_ALERT_MSG_CERT_REVOKED 44 /* 0x2C */
markrad	0:cdf462088d13	284	#define MBEDTLS_SSL_ALERT_MSG_CERT_EXPIRED 45 /* 0x2D */
markrad	0:cdf462088d13	285	#define MBEDTLS_SSL_ALERT_MSG_CERT_UNKNOWN 46 /* 0x2E */
markrad	0:cdf462088d13	286	#define MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER 47 /* 0x2F */
markrad	0:cdf462088d13	287	#define MBEDTLS_SSL_ALERT_MSG_UNKNOWN_CA 48 /* 0x30 */
markrad	0:cdf462088d13	288	#define MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED 49 /* 0x31 */
markrad	0:cdf462088d13	289	#define MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR 50 /* 0x32 */
markrad	0:cdf462088d13	290	#define MBEDTLS_SSL_ALERT_MSG_DECRYPT_ERROR 51 /* 0x33 */
markrad	0:cdf462088d13	291	#define MBEDTLS_SSL_ALERT_MSG_EXPORT_RESTRICTION 60 /* 0x3C */
markrad	0:cdf462088d13	292	#define MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION 70 /* 0x46 */
markrad	0:cdf462088d13	293	#define MBEDTLS_SSL_ALERT_MSG_INSUFFICIENT_SECURITY 71 /* 0x47 */
markrad	0:cdf462088d13	294	#define MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR 80 /* 0x50 */
markrad	0:cdf462088d13	295	#define MBEDTLS_SSL_ALERT_MSG_INAPROPRIATE_FALLBACK 86 /* 0x56 */
markrad	0:cdf462088d13	296	#define MBEDTLS_SSL_ALERT_MSG_USER_CANCELED 90 /* 0x5A */
markrad	0:cdf462088d13	297	#define MBEDTLS_SSL_ALERT_MSG_NO_RENEGOTIATION 100 /* 0x64 */
markrad	0:cdf462088d13	298	#define MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_EXT 110 /* 0x6E */
markrad	0:cdf462088d13	299	#define MBEDTLS_SSL_ALERT_MSG_UNRECOGNIZED_NAME 112 /* 0x70 */
markrad	0:cdf462088d13	300	#define MBEDTLS_SSL_ALERT_MSG_UNKNOWN_PSK_IDENTITY 115 /* 0x73 */
markrad	0:cdf462088d13	301	#define MBEDTLS_SSL_ALERT_MSG_NO_APPLICATION_PROTOCOL 120 /* 0x78 */
markrad	0:cdf462088d13	302
markrad	0:cdf462088d13	303	#define MBEDTLS_SSL_HS_HELLO_REQUEST 0
markrad	0:cdf462088d13	304	#define MBEDTLS_SSL_HS_CLIENT_HELLO 1
markrad	0:cdf462088d13	305	#define MBEDTLS_SSL_HS_SERVER_HELLO 2
markrad	0:cdf462088d13	306	#define MBEDTLS_SSL_HS_HELLO_VERIFY_REQUEST 3
markrad	0:cdf462088d13	307	#define MBEDTLS_SSL_HS_NEW_SESSION_TICKET 4
markrad	0:cdf462088d13	308	#define MBEDTLS_SSL_HS_CERTIFICATE 11
markrad	0:cdf462088d13	309	#define MBEDTLS_SSL_HS_SERVER_KEY_EXCHANGE 12
markrad	0:cdf462088d13	310	#define MBEDTLS_SSL_HS_CERTIFICATE_REQUEST 13
markrad	0:cdf462088d13	311	#define MBEDTLS_SSL_HS_SERVER_HELLO_DONE 14
markrad	0:cdf462088d13	312	#define MBEDTLS_SSL_HS_CERTIFICATE_VERIFY 15
markrad	0:cdf462088d13	313	#define MBEDTLS_SSL_HS_CLIENT_KEY_EXCHANGE 16
markrad	0:cdf462088d13	314	#define MBEDTLS_SSL_HS_FINISHED 20
markrad	0:cdf462088d13	315
markrad	0:cdf462088d13	316	/*
markrad	0:cdf462088d13	317	* TLS extensions
markrad	0:cdf462088d13	318	*/
markrad	0:cdf462088d13	319	#define MBEDTLS_TLS_EXT_SERVERNAME 0
markrad	0:cdf462088d13	320	#define MBEDTLS_TLS_EXT_SERVERNAME_HOSTNAME 0
markrad	0:cdf462088d13	321
markrad	0:cdf462088d13	322	#define MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH 1
markrad	0:cdf462088d13	323
markrad	0:cdf462088d13	324	#define MBEDTLS_TLS_EXT_TRUNCATED_HMAC 4
markrad	0:cdf462088d13	325
markrad	0:cdf462088d13	326	#define MBEDTLS_TLS_EXT_SUPPORTED_ELLIPTIC_CURVES 10
markrad	0:cdf462088d13	327	#define MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS 11
markrad	0:cdf462088d13	328
markrad	0:cdf462088d13	329	#define MBEDTLS_TLS_EXT_SIG_ALG 13
markrad	0:cdf462088d13	330
markrad	0:cdf462088d13	331	#define MBEDTLS_TLS_EXT_ALPN 16
markrad	0:cdf462088d13	332
markrad	0:cdf462088d13	333	#define MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC 22 /* 0x16 */
markrad	0:cdf462088d13	334	#define MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET 0x0017 /* 23 */
markrad	0:cdf462088d13	335
markrad	0:cdf462088d13	336	#define MBEDTLS_TLS_EXT_SESSION_TICKET 35
markrad	0:cdf462088d13	337
markrad	0:cdf462088d13	338	#define MBEDTLS_TLS_EXT_ECJPAKE_KKPP 256 /* experimental */
markrad	0:cdf462088d13	339
markrad	0:cdf462088d13	340	#define MBEDTLS_TLS_EXT_RENEGOTIATION_INFO 0xFF01
markrad	0:cdf462088d13	341
markrad	0:cdf462088d13	342	/*
markrad	0:cdf462088d13	343	* Size defines
markrad	0:cdf462088d13	344	*/
markrad	0:cdf462088d13	345	#if !defined(MBEDTLS_PSK_MAX_LEN)
markrad	0:cdf462088d13	346	#define MBEDTLS_PSK_MAX_LEN 32 /* 256 bits */
markrad	0:cdf462088d13	347	#endif
markrad	0:cdf462088d13	348
markrad	0:cdf462088d13	349	/* Dummy type used only for its size */
markrad	0:cdf462088d13	350	union mbedtls_ssl_premaster_secret
markrad	0:cdf462088d13	351	{
markrad	0:cdf462088d13	352	#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)
markrad	0:cdf462088d13	353	unsigned char _pms_rsa[48]; /* RFC 5246 8.1.1 */
markrad	0:cdf462088d13	354	#endif
markrad	0:cdf462088d13	355	#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)
markrad	0:cdf462088d13	356	unsigned char _pms_dhm[MBEDTLS_MPI_MAX_SIZE]; /* RFC 5246 8.1.2 */
markrad	0:cdf462088d13	357	#endif
markrad	0:cdf462088d13	358	#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) \|\| \
markrad	0:cdf462088d13	359	defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) \|\| \
markrad	0:cdf462088d13	360	defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) \|\| \
markrad	0:cdf462088d13	361	defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
markrad	0:cdf462088d13	362	unsigned char _pms_ecdh[MBEDTLS_ECP_MAX_BYTES]; /* RFC 4492 5.10 */
markrad	0:cdf462088d13	363	#endif
markrad	0:cdf462088d13	364	#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)
markrad	0:cdf462088d13	365	unsigned char _pms_psk[4 + 2 * MBEDTLS_PSK_MAX_LEN]; /* RFC 4279 2 */
markrad	0:cdf462088d13	366	#endif
markrad	0:cdf462088d13	367	#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
markrad	0:cdf462088d13	368	unsigned char _pms_dhe_psk[4 + MBEDTLS_MPI_MAX_SIZE
markrad	0:cdf462088d13	369	+ MBEDTLS_PSK_MAX_LEN]; /* RFC 4279 3 */
markrad	0:cdf462088d13	370	#endif
markrad	0:cdf462088d13	371	#if defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
markrad	0:cdf462088d13	372	unsigned char _pms_rsa_psk[52 + MBEDTLS_PSK_MAX_LEN]; /* RFC 4279 4 */
markrad	0:cdf462088d13	373	#endif
markrad	0:cdf462088d13	374	#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
markrad	0:cdf462088d13	375	unsigned char _pms_ecdhe_psk[4 + MBEDTLS_ECP_MAX_BYTES
markrad	0:cdf462088d13	376	+ MBEDTLS_PSK_MAX_LEN]; /* RFC 5489 2 */
markrad	0:cdf462088d13	377	#endif
markrad	0:cdf462088d13	378	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
markrad	0:cdf462088d13	379	unsigned char _pms_ecjpake[32]; /* Thread spec: SHA-256 output */
markrad	0:cdf462088d13	380	#endif
markrad	0:cdf462088d13	381	};
markrad	0:cdf462088d13	382
markrad	0:cdf462088d13	383	#define MBEDTLS_PREMASTER_SIZE sizeof( union mbedtls_ssl_premaster_secret )
markrad	0:cdf462088d13	384
markrad	0:cdf462088d13	385	#ifdef __cplusplus
markrad	0:cdf462088d13	386	extern "C" {
markrad	0:cdf462088d13	387	#endif
markrad	0:cdf462088d13	388
markrad	0:cdf462088d13	389	/*
markrad	0:cdf462088d13	390	* SSL state machine
markrad	0:cdf462088d13	391	*/
markrad	0:cdf462088d13	392	typedef enum
markrad	0:cdf462088d13	393	{
markrad	0:cdf462088d13	394	MBEDTLS_SSL_HELLO_REQUEST,
markrad	0:cdf462088d13	395	MBEDTLS_SSL_CLIENT_HELLO,
markrad	0:cdf462088d13	396	MBEDTLS_SSL_SERVER_HELLO,
markrad	0:cdf462088d13	397	MBEDTLS_SSL_SERVER_CERTIFICATE,
markrad	0:cdf462088d13	398	MBEDTLS_SSL_SERVER_KEY_EXCHANGE,
markrad	0:cdf462088d13	399	MBEDTLS_SSL_CERTIFICATE_REQUEST,
markrad	0:cdf462088d13	400	MBEDTLS_SSL_SERVER_HELLO_DONE,
markrad	0:cdf462088d13	401	MBEDTLS_SSL_CLIENT_CERTIFICATE,
markrad	0:cdf462088d13	402	MBEDTLS_SSL_CLIENT_KEY_EXCHANGE,
markrad	0:cdf462088d13	403	MBEDTLS_SSL_CERTIFICATE_VERIFY,
markrad	0:cdf462088d13	404	MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC,
markrad	0:cdf462088d13	405	MBEDTLS_SSL_CLIENT_FINISHED,
markrad	0:cdf462088d13	406	MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC,
markrad	0:cdf462088d13	407	MBEDTLS_SSL_SERVER_FINISHED,
markrad	0:cdf462088d13	408	MBEDTLS_SSL_FLUSH_BUFFERS,
markrad	0:cdf462088d13	409	MBEDTLS_SSL_HANDSHAKE_WRAPUP,
markrad	0:cdf462088d13	410	MBEDTLS_SSL_HANDSHAKE_OVER,
markrad	0:cdf462088d13	411	MBEDTLS_SSL_SERVER_NEW_SESSION_TICKET,
markrad	0:cdf462088d13	412	MBEDTLS_SSL_SERVER_HELLO_VERIFY_REQUEST_SENT,
markrad	0:cdf462088d13	413	}
markrad	0:cdf462088d13	414	mbedtls_ssl_states;
markrad	0:cdf462088d13	415
markrad	0:cdf462088d13	416	/**
markrad	0:cdf462088d13	417	* \brief Callback type: send data on the network.
markrad	0:cdf462088d13	418	*
markrad	0:cdf462088d13	419	* \note That callback may be either blocking or non-blocking.
markrad	0:cdf462088d13	420	*
markrad	0:cdf462088d13	421	* \param ctx Context for the send callback (typically a file descriptor)
markrad	0:cdf462088d13	422	* \param buf Buffer holding the data to send
markrad	0:cdf462088d13	423	* \param len Length of the data to send
markrad	0:cdf462088d13	424	*
markrad	0:cdf462088d13	425	* \return The callback must return the number of bytes sent if any,
markrad	0:cdf462088d13	426	* or a non-zero error code.
markrad	0:cdf462088d13	427	* If performing non-blocking I/O, \c MBEDTLS_ERR_SSL_WANT_WRITE
markrad	0:cdf462088d13	428	* must be returned when the operation would block.
markrad	0:cdf462088d13	429	*
markrad	0:cdf462088d13	430	* \note The callback is allowed to send fewer bytes than requested.
markrad	0:cdf462088d13	431	* It must always return the number of bytes actually sent.
markrad	0:cdf462088d13	432	*/
markrad	0:cdf462088d13	433	typedef int mbedtls_ssl_send_t( void *ctx,
markrad	0:cdf462088d13	434	const unsigned char *buf,
markrad	0:cdf462088d13	435	size_t len );
markrad	0:cdf462088d13	436
markrad	0:cdf462088d13	437	/**
markrad	0:cdf462088d13	438	* \brief Callback type: receive data from the network.
markrad	0:cdf462088d13	439	*
markrad	0:cdf462088d13	440	* \note That callback may be either blocking or non-blocking.
markrad	0:cdf462088d13	441	*
markrad	0:cdf462088d13	442	* \param ctx Context for the receive callback (typically a file
markrad	0:cdf462088d13	443	* descriptor)
markrad	0:cdf462088d13	444	* \param buf Buffer to write the received data to
markrad	0:cdf462088d13	445	* \param len Length of the receive buffer
markrad	0:cdf462088d13	446	*
markrad	0:cdf462088d13	447	* \return The callback must return the number of bytes received,
markrad	0:cdf462088d13	448	* or a non-zero error code.
markrad	0:cdf462088d13	449	* If performing non-blocking I/O, \c MBEDTLS_ERR_SSL_WANT_READ
markrad	0:cdf462088d13	450	* must be returned when the operation would block.
markrad	0:cdf462088d13	451	*
markrad	0:cdf462088d13	452	* \note The callback may receive fewer bytes than the length of the
markrad	0:cdf462088d13	453	* buffer. It must always return the number of bytes actually
markrad	0:cdf462088d13	454	* received and written to the buffer.
markrad	0:cdf462088d13	455	*/
markrad	0:cdf462088d13	456	typedef int mbedtls_ssl_recv_t( void *ctx,
markrad	0:cdf462088d13	457	unsigned char *buf,
markrad	0:cdf462088d13	458	size_t len );
markrad	0:cdf462088d13	459
markrad	0:cdf462088d13	460	/**
markrad	0:cdf462088d13	461	* \brief Callback type: receive data from the network, with timeout
markrad	0:cdf462088d13	462	*
markrad	0:cdf462088d13	463	* \note That callback must block until data is received, or the
markrad	0:cdf462088d13	464	* timeout delay expires, or the operation is interrupted by a
markrad	0:cdf462088d13	465	* signal.
markrad	0:cdf462088d13	466	*
markrad	0:cdf462088d13	467	* \param ctx Context for the receive callback (typically a file descriptor)
markrad	0:cdf462088d13	468	* \param buf Buffer to write the received data to
markrad	0:cdf462088d13	469	* \param len Length of the receive buffer
markrad	0:cdf462088d13	470	* \param timeout Maximum nomber of millisecondes to wait for data
markrad	0:cdf462088d13	471	* 0 means no timeout (potentially waiting forever)
markrad	0:cdf462088d13	472	*
markrad	0:cdf462088d13	473	* \return The callback must return the number of bytes received,
markrad	0:cdf462088d13	474	* or a non-zero error code:
markrad	0:cdf462088d13	475	* \c MBEDTLS_ERR_SSL_TIMEOUT if the operation timed out,
markrad	0:cdf462088d13	476	* \c MBEDTLS_ERR_SSL_WANT_READ if interrupted by a signal.
markrad	0:cdf462088d13	477	*
markrad	0:cdf462088d13	478	* \note The callback may receive fewer bytes than the length of the
markrad	0:cdf462088d13	479	* buffer. It must always return the number of bytes actually
markrad	0:cdf462088d13	480	* received and written to the buffer.
markrad	0:cdf462088d13	481	*/
markrad	0:cdf462088d13	482	typedef int mbedtls_ssl_recv_timeout_t( void *ctx,
markrad	0:cdf462088d13	483	unsigned char *buf,
markrad	0:cdf462088d13	484	size_t len,
markrad	0:cdf462088d13	485	uint32_t timeout );
markrad	0:cdf462088d13	486	/**
markrad	0:cdf462088d13	487	* \brief Callback type: set a pair of timers/delays to watch
markrad	0:cdf462088d13	488	*
markrad	0:cdf462088d13	489	* \param ctx Context pointer
markrad	0:cdf462088d13	490	* \param int_ms Intermediate delay in milliseconds
markrad	0:cdf462088d13	491	* \param fin_ms Final delay in milliseconds
markrad	0:cdf462088d13	492	* 0 cancels the current timer.
markrad	0:cdf462088d13	493	*
markrad	0:cdf462088d13	494	* \note This callback must at least store the necessary information
markrad	0:cdf462088d13	495	* for the associated \c mbedtls_ssl_get_timer_t callback to
markrad	0:cdf462088d13	496	* return correct information.
markrad	0:cdf462088d13	497	*
markrad	0:cdf462088d13	498	* \note If using a event-driven style of programming, an event must
markrad	0:cdf462088d13	499	* be generated when the final delay is passed. The event must
markrad	0:cdf462088d13	500	* cause a call to \c mbedtls_ssl_handshake() with the proper
markrad	0:cdf462088d13	501	* SSL context to be scheduled. Care must be taken to ensure
markrad	0:cdf462088d13	502	* that at most one such call happens at a time.
markrad	0:cdf462088d13	503	*
markrad	0:cdf462088d13	504	* \note Only one timer at a time must be running. Calling this
markrad	0:cdf462088d13	505	* function while a timer is running must cancel it. Cancelled
markrad	0:cdf462088d13	506	* timers must not generate any event.
markrad	0:cdf462088d13	507	*/
markrad	0:cdf462088d13	508	typedef void mbedtls_ssl_set_timer_t( void * ctx,
markrad	0:cdf462088d13	509	uint32_t int_ms,
markrad	0:cdf462088d13	510	uint32_t fin_ms );
markrad	0:cdf462088d13	511
markrad	0:cdf462088d13	512	/**
markrad	0:cdf462088d13	513	* \brief Callback type: get status of timers/delays
markrad	0:cdf462088d13	514	*
markrad	0:cdf462088d13	515	* \param ctx Context pointer
markrad	0:cdf462088d13	516	*
markrad	0:cdf462088d13	517	* \return This callback must return:
markrad	0:cdf462088d13	518	* -1 if cancelled (fin_ms == 0),
markrad	0:cdf462088d13	519	* 0 if none of the delays have passed,
markrad	0:cdf462088d13	520	* 1 if only the intermediate delay has passed,
markrad	0:cdf462088d13	521	* 2 if the final delay has passed.
markrad	0:cdf462088d13	522	*/
markrad	0:cdf462088d13	523	typedef int mbedtls_ssl_get_timer_t( void * ctx );
markrad	0:cdf462088d13	524
markrad	0:cdf462088d13	525
markrad	0:cdf462088d13	526	/* Defined below */
markrad	0:cdf462088d13	527	typedef struct mbedtls_ssl_session mbedtls_ssl_session;
markrad	0:cdf462088d13	528	typedef struct mbedtls_ssl_context mbedtls_ssl_context;
markrad	0:cdf462088d13	529	typedef struct mbedtls_ssl_config mbedtls_ssl_config;
markrad	0:cdf462088d13	530
markrad	0:cdf462088d13	531	/* Defined in ssl_internal.h */
markrad	0:cdf462088d13	532	typedef struct mbedtls_ssl_transform mbedtls_ssl_transform;
markrad	0:cdf462088d13	533	typedef struct mbedtls_ssl_handshake_params mbedtls_ssl_handshake_params;
markrad	0:cdf462088d13	534	#if defined(MBEDTLS_X509_CRT_PARSE_C)
markrad	0:cdf462088d13	535	typedef struct mbedtls_ssl_key_cert mbedtls_ssl_key_cert;
markrad	0:cdf462088d13	536	#endif
markrad	0:cdf462088d13	537	#if defined(MBEDTLS_SSL_PROTO_DTLS)
markrad	0:cdf462088d13	538	typedef struct mbedtls_ssl_flight_item mbedtls_ssl_flight_item;
markrad	0:cdf462088d13	539	#endif
markrad	0:cdf462088d13	540
markrad	0:cdf462088d13	541	/*
markrad	0:cdf462088d13	542	* This structure is used for storing current session data.
markrad	0:cdf462088d13	543	*/
markrad	0:cdf462088d13	544	struct mbedtls_ssl_session
markrad	0:cdf462088d13	545	{
markrad	0:cdf462088d13	546	#if defined(MBEDTLS_HAVE_TIME)
markrad	0:cdf462088d13	547	mbedtls_time_t start; /!< starting time /
markrad	0:cdf462088d13	548	#endif
markrad	0:cdf462088d13	549	int ciphersuite; /!< chosen ciphersuite /
markrad	0:cdf462088d13	550	int compression; /!< chosen compression /
markrad	0:cdf462088d13	551	size_t id_len; /!< session id length /
markrad	0:cdf462088d13	552	unsigned char id[32]; /!< session identifier /
markrad	0:cdf462088d13	553	unsigned char master[48]; /!< the master secret /
markrad	0:cdf462088d13	554
markrad	0:cdf462088d13	555	#if defined(MBEDTLS_X509_CRT_PARSE_C)
markrad	0:cdf462088d13	556	mbedtls_x509_crt peer_cert; /!< peer X.509 cert chain */
markrad	0:cdf462088d13	557	#endif /* MBEDTLS_X509_CRT_PARSE_C */
markrad	0:cdf462088d13	558	uint32_t verify_result; /!< verification result /
markrad	0:cdf462088d13	559
markrad	0:cdf462088d13	560	#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
markrad	0:cdf462088d13	561	unsigned char ticket; /!< RFC 5077 session ticket */
markrad	0:cdf462088d13	562	size_t ticket_len; /!< session ticket length /
markrad	0:cdf462088d13	563	uint32_t ticket_lifetime; /!< ticket lifetime hint /
markrad	0:cdf462088d13	564	#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */
markrad	0:cdf462088d13	565
markrad	0:cdf462088d13	566	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
markrad	0:cdf462088d13	567	unsigned char mfl_code; /!< MaxFragmentLength negotiated by peer /
markrad	0:cdf462088d13	568	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
markrad	0:cdf462088d13	569
markrad	0:cdf462088d13	570	#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
markrad	0:cdf462088d13	571	int trunc_hmac; /!< flag for truncated hmac activation /
markrad	0:cdf462088d13	572	#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
markrad	0:cdf462088d13	573
markrad	0:cdf462088d13	574	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
markrad	0:cdf462088d13	575	int encrypt_then_mac; /!< flag for EtM activation /
markrad	0:cdf462088d13	576	#endif
markrad	0:cdf462088d13	577	};
markrad	0:cdf462088d13	578
markrad	0:cdf462088d13	579	/**
markrad	0:cdf462088d13	580	* SSL/TLS configuration to be shared between mbedtls_ssl_context structures.
markrad	0:cdf462088d13	581	*/
markrad	0:cdf462088d13	582	struct mbedtls_ssl_config
markrad	0:cdf462088d13	583	{
markrad	0:cdf462088d13	584	/* Group items by size (largest first) to minimize padding overhead */
markrad	0:cdf462088d13	585
markrad	0:cdf462088d13	586	/*
markrad	0:cdf462088d13	587	* Pointers
markrad	0:cdf462088d13	588	*/
markrad	0:cdf462088d13	589
markrad	0:cdf462088d13	590	const int ciphersuite_list[4]; /!< allowed ciphersuites per version */
markrad	0:cdf462088d13	591
markrad	0:cdf462088d13	592	/** Callback for printing debug output */
markrad	0:cdf462088d13	593	void (f_dbg)(void , int, const char , int, const char );
markrad	0:cdf462088d13	594	void p_dbg; /!< context for the debug function */
markrad	0:cdf462088d13	595
markrad	0:cdf462088d13	596	/** Callback for getting (pseudo-)random numbers */
markrad	0:cdf462088d13	597	int (f_rng)(void , unsigned char *, size_t);
markrad	0:cdf462088d13	598	void p_rng; /!< context for the RNG function */
markrad	0:cdf462088d13	599
markrad	0:cdf462088d13	600	/** Callback to retrieve a session from the cache */
markrad	0:cdf462088d13	601	int (f_get_cache)(void , mbedtls_ssl_session *);
markrad	0:cdf462088d13	602	/** Callback to store a session into the cache */
markrad	0:cdf462088d13	603	int (f_set_cache)(void , const mbedtls_ssl_session *);
markrad	0:cdf462088d13	604	void p_cache; /!< context for cache callbacks */
markrad	0:cdf462088d13	605
markrad	0:cdf462088d13	606	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
markrad	0:cdf462088d13	607	/** Callback for setting cert according to SNI extension */
markrad	0:cdf462088d13	608	int (f_sni)(void , mbedtls_ssl_context , const unsigned char , size_t);
markrad	0:cdf462088d13	609	void p_sni; /!< context for SNI callback */
markrad	0:cdf462088d13	610	#endif
markrad	0:cdf462088d13	611
markrad	0:cdf462088d13	612	#if defined(MBEDTLS_X509_CRT_PARSE_C)
markrad	0:cdf462088d13	613	/** Callback to customize X.509 certificate chain verification */
markrad	0:cdf462088d13	614	int (f_vrfy)(void , mbedtls_x509_crt , int, uint32_t );
markrad	0:cdf462088d13	615	void p_vrfy; /!< context for X.509 verify calllback */
markrad	0:cdf462088d13	616	#endif
markrad	0:cdf462088d13	617
markrad	0:cdf462088d13	618	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
markrad	0:cdf462088d13	619	/** Callback to retrieve PSK key from identity */
markrad	0:cdf462088d13	620	int (f_psk)(void , mbedtls_ssl_context , const unsigned char , size_t);
markrad	0:cdf462088d13	621	void p_psk; /!< context for PSK callback */
markrad	0:cdf462088d13	622	#endif
markrad	0:cdf462088d13	623
markrad	0:cdf462088d13	624	#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
markrad	0:cdf462088d13	625	/** Callback to create & write a cookie for ClientHello veirifcation */
markrad	0:cdf462088d13	626	int (f_cookie_write)( void , unsigned char *, unsigned char ,
markrad	0:cdf462088d13	627	const unsigned char *, size_t );
markrad	0:cdf462088d13	628	/** Callback to verify validity of a ClientHello cookie */
markrad	0:cdf462088d13	629	int (f_cookie_check)( void , const unsigned char *, size_t,
markrad	0:cdf462088d13	630	const unsigned char *, size_t );
markrad	0:cdf462088d13	631	void p_cookie; /!< context for the cookie callbacks */
markrad	0:cdf462088d13	632	#endif
markrad	0:cdf462088d13	633
markrad	0:cdf462088d13	634	#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_SRV_C)
markrad	0:cdf462088d13	635	/** Callback to create & write a session ticket */
markrad	0:cdf462088d13	636	int (f_ticket_write)( void , const mbedtls_ssl_session *,
markrad	0:cdf462088d13	637	unsigned char , const unsigned char , size_t , uint32_t );
markrad	0:cdf462088d13	638	/** Callback to parse a session ticket into a session structure */
markrad	0:cdf462088d13	639	int (f_ticket_parse)( void , mbedtls_ssl_session , unsigned char , size_t);
markrad	0:cdf462088d13	640	void p_ticket; /!< context for the ticket callbacks */
markrad	0:cdf462088d13	641	#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_SRV_C */
markrad	0:cdf462088d13	642
markrad	0:cdf462088d13	643	#if defined(MBEDTLS_SSL_EXPORT_KEYS)
markrad	0:cdf462088d13	644	/** Callback to export key block and master secret */
markrad	0:cdf462088d13	645	int (f_export_keys)( void , const unsigned char *,
markrad	0:cdf462088d13	646	const unsigned char *, size_t, size_t, size_t );
markrad	0:cdf462088d13	647	void p_export_keys; /!< context for key export callback */
markrad	0:cdf462088d13	648	#endif
markrad	0:cdf462088d13	649
markrad	0:cdf462088d13	650	#if defined(MBEDTLS_X509_CRT_PARSE_C)
markrad	0:cdf462088d13	651	const mbedtls_x509_crt_profile cert_profile; /!< verification profile */
markrad	0:cdf462088d13	652	mbedtls_ssl_key_cert key_cert; /!< own certificate/key pair(s) */
markrad	0:cdf462088d13	653	mbedtls_x509_crt ca_chain; /!< trusted CAs */
markrad	0:cdf462088d13	654	mbedtls_x509_crl ca_crl; /!< trusted CAs CRLs */
markrad	0:cdf462088d13	655	#endif /* MBEDTLS_X509_CRT_PARSE_C */
markrad	0:cdf462088d13	656
markrad	0:cdf462088d13	657	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
markrad	0:cdf462088d13	658	const int sig_hashes; /!< allowed signature hashes */
markrad	0:cdf462088d13	659	#endif
markrad	0:cdf462088d13	660
markrad	0:cdf462088d13	661	#if defined(MBEDTLS_ECP_C)
markrad	0:cdf462088d13	662	const mbedtls_ecp_group_id curve_list; /!< allowed curves */
markrad	0:cdf462088d13	663	#endif
markrad	0:cdf462088d13	664
markrad	0:cdf462088d13	665	#if defined(MBEDTLS_DHM_C)
markrad	0:cdf462088d13	666	mbedtls_mpi dhm_P; /!< prime modulus for DHM /
markrad	0:cdf462088d13	667	mbedtls_mpi dhm_G; /!< generator for DHM /
markrad	0:cdf462088d13	668	#endif
markrad	0:cdf462088d13	669
markrad	0:cdf462088d13	670	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
markrad	0:cdf462088d13	671	unsigned char psk; /!< pre-shared key */
markrad	0:cdf462088d13	672	size_t psk_len; /!< length of the pre-shared key /
markrad	0:cdf462088d13	673	unsigned char psk_identity; /!< identity for PSK negotiation */
markrad	0:cdf462088d13	674	size_t psk_identity_len;/!< length of identity /
markrad	0:cdf462088d13	675	#endif
markrad	0:cdf462088d13	676
markrad	0:cdf462088d13	677	#if defined(MBEDTLS_SSL_ALPN)
markrad	0:cdf462088d13	678	const char *alpn_list; /!< ordered list of protocols */
markrad	0:cdf462088d13	679	#endif
markrad	0:cdf462088d13	680
markrad	0:cdf462088d13	681	/*
markrad	0:cdf462088d13	682	* Numerical settings (int then char)
markrad	0:cdf462088d13	683	*/
markrad	0:cdf462088d13	684
markrad	0:cdf462088d13	685	uint32_t read_timeout; /!< timeout for mbedtls_ssl_read (ms) /
markrad	0:cdf462088d13	686
markrad	0:cdf462088d13	687	#if defined(MBEDTLS_SSL_PROTO_DTLS)
markrad	0:cdf462088d13	688	uint32_t hs_timeout_min; /*!< initial value of the handshake
markrad	0:cdf462088d13	689	retransmission timeout (ms) */
markrad	0:cdf462088d13	690	uint32_t hs_timeout_max; /*!< maximum value of the handshake
markrad	0:cdf462088d13	691	retransmission timeout (ms) */
markrad	0:cdf462088d13	692	#endif
markrad	0:cdf462088d13	693
markrad	0:cdf462088d13	694	#if defined(MBEDTLS_SSL_RENEGOTIATION)
markrad	0:cdf462088d13	695	int renego_max_records; /!< grace period for renegotiation /
markrad	0:cdf462088d13	696	unsigned char renego_period[8]; /*!< value of the record counters
markrad	0:cdf462088d13	697	that triggers renegotiation */
markrad	0:cdf462088d13	698	#endif
markrad	0:cdf462088d13	699
markrad	0:cdf462088d13	700	#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
markrad	0:cdf462088d13	701	unsigned int badmac_limit; /!< limit of records with a bad MAC /
markrad	0:cdf462088d13	702	#endif
markrad	0:cdf462088d13	703
markrad	0:cdf462088d13	704	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_CLI_C)
markrad	0:cdf462088d13	705	unsigned int dhm_min_bitlen; /!< min. bit length of the DHM prime /
markrad	0:cdf462088d13	706	#endif
markrad	0:cdf462088d13	707
markrad	0:cdf462088d13	708	unsigned char max_major_ver; /!< max. major version used /
markrad	0:cdf462088d13	709	unsigned char max_minor_ver; /!< max. minor version used /
markrad	0:cdf462088d13	710	unsigned char min_major_ver; /!< min. major version used /
markrad	0:cdf462088d13	711	unsigned char min_minor_ver; /!< min. minor version used /
markrad	0:cdf462088d13	712
markrad	0:cdf462088d13	713	/*
markrad	0:cdf462088d13	714	* Flags (bitfields)
markrad	0:cdf462088d13	715	*/
markrad	0:cdf462088d13	716
markrad	0:cdf462088d13	717	unsigned int endpoint : 1; /!< 0: client, 1: server /
markrad	0:cdf462088d13	718	unsigned int transport : 1; /!< stream (TLS) or datagram (DTLS) /
markrad	0:cdf462088d13	719	unsigned int authmode : 2; /!< MBEDTLS_SSL_VERIFY_XXX /
markrad	0:cdf462088d13	720	/* needed even with renego disabled for LEGACY_BREAK_HANDSHAKE */
markrad	0:cdf462088d13	721	unsigned int allow_legacy_renegotiation : 2 ; /!< MBEDTLS_LEGACY_XXX /
markrad	0:cdf462088d13	722	#if defined(MBEDTLS_ARC4_C)
markrad	0:cdf462088d13	723	unsigned int arc4_disabled : 1; /!< blacklist RC4 ciphersuites? /
markrad	0:cdf462088d13	724	#endif
markrad	0:cdf462088d13	725	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
markrad	0:cdf462088d13	726	unsigned int mfl_code : 3; /!< desired fragment length /
markrad	0:cdf462088d13	727	#endif
markrad	0:cdf462088d13	728	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
markrad	0:cdf462088d13	729	unsigned int encrypt_then_mac : 1 ; /!< negotiate encrypt-then-mac? /
markrad	0:cdf462088d13	730	#endif
markrad	0:cdf462088d13	731	#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
markrad	0:cdf462088d13	732	unsigned int extended_ms : 1; /!< negotiate extended master secret? /
markrad	0:cdf462088d13	733	#endif
markrad	0:cdf462088d13	734	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
markrad	0:cdf462088d13	735	unsigned int anti_replay : 1; /!< detect and prevent replay? /
markrad	0:cdf462088d13	736	#endif
markrad	0:cdf462088d13	737	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
markrad	0:cdf462088d13	738	unsigned int cbc_record_splitting : 1; /!< do cbc record splitting /
markrad	0:cdf462088d13	739	#endif
markrad	0:cdf462088d13	740	#if defined(MBEDTLS_SSL_RENEGOTIATION)
markrad	0:cdf462088d13	741	unsigned int disable_renegotiation : 1; /!< disable renegotiation? /
markrad	0:cdf462088d13	742	#endif
markrad	0:cdf462088d13	743	#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
markrad	0:cdf462088d13	744	unsigned int trunc_hmac : 1; /!< negotiate truncated hmac? /
markrad	0:cdf462088d13	745	#endif
markrad	0:cdf462088d13	746	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
markrad	0:cdf462088d13	747	unsigned int session_tickets : 1; /!< use session tickets? /
markrad	0:cdf462088d13	748	#endif
markrad	0:cdf462088d13	749	#if defined(MBEDTLS_SSL_FALLBACK_SCSV) && defined(MBEDTLS_SSL_CLI_C)
markrad	0:cdf462088d13	750	unsigned int fallback : 1; /!< is this a fallback? /
markrad	0:cdf462088d13	751	#endif
markrad	0:cdf462088d13	752	};
markrad	0:cdf462088d13	753
markrad	0:cdf462088d13	754
markrad	0:cdf462088d13	755	struct mbedtls_ssl_context
markrad	0:cdf462088d13	756	{
markrad	0:cdf462088d13	757	const mbedtls_ssl_config conf; /!< configuration information */
markrad	0:cdf462088d13	758
markrad	0:cdf462088d13	759	/*
markrad	0:cdf462088d13	760	* Miscellaneous
markrad	0:cdf462088d13	761	*/
markrad	0:cdf462088d13	762	int state; /!< SSL handshake: current state /
markrad	0:cdf462088d13	763	#if defined(MBEDTLS_SSL_RENEGOTIATION)
markrad	0:cdf462088d13	764	int renego_status; /!< Initial, in progress, pending? /
markrad	0:cdf462088d13	765	int renego_records_seen; /*!< Records since renego request, or with DTLS,
markrad	0:cdf462088d13	766	number of retransmissions of request if
markrad	0:cdf462088d13	767	renego_max_records is < 0 */
markrad	0:cdf462088d13	768	#endif
markrad	0:cdf462088d13	769
markrad	0:cdf462088d13	770	int major_ver; /!< equal to MBEDTLS_SSL_MAJOR_VERSION_3 /
markrad	0:cdf462088d13	771	int minor_ver; /!< either 0 (SSL3) or 1 (TLS1.0) /
markrad	0:cdf462088d13	772
markrad	0:cdf462088d13	773	#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
markrad	0:cdf462088d13	774	unsigned badmac_seen; /!< records with a bad MAC received /
markrad	0:cdf462088d13	775	#endif
markrad	0:cdf462088d13	776
markrad	0:cdf462088d13	777	mbedtls_ssl_send_t f_send; /!< Callback for network send */
markrad	0:cdf462088d13	778	mbedtls_ssl_recv_t f_recv; /!< Callback for network receive */
markrad	0:cdf462088d13	779	mbedtls_ssl_recv_timeout_t *f_recv_timeout;
markrad	0:cdf462088d13	780	/!< Callback for network receive with timeout /
markrad	0:cdf462088d13	781
markrad	0:cdf462088d13	782	void p_bio; /!< context for I/O operations */
markrad	0:cdf462088d13	783
markrad	0:cdf462088d13	784	/*
markrad	0:cdf462088d13	785	* Session layer
markrad	0:cdf462088d13	786	*/
markrad	0:cdf462088d13	787	mbedtls_ssl_session session_in; /!< current session data (in) */
markrad	0:cdf462088d13	788	mbedtls_ssl_session session_out; /!< current session data (out) */
markrad	0:cdf462088d13	789	mbedtls_ssl_session session; /!< negotiated session data */
markrad	0:cdf462088d13	790	mbedtls_ssl_session session_negotiate; /!< session data in negotiation */
markrad	0:cdf462088d13	791
markrad	0:cdf462088d13	792	mbedtls_ssl_handshake_params handshake; /!< params required only during
markrad	0:cdf462088d13	793	the handshake process */
markrad	0:cdf462088d13	794
markrad	0:cdf462088d13	795	/*
markrad	0:cdf462088d13	796	* Record layer transformations
markrad	0:cdf462088d13	797	*/
markrad	0:cdf462088d13	798	mbedtls_ssl_transform transform_in; /!< current transform params (in) */
markrad	0:cdf462088d13	799	mbedtls_ssl_transform transform_out; /!< current transform params (in) */
markrad	0:cdf462088d13	800	mbedtls_ssl_transform transform; /!< negotiated transform params */
markrad	0:cdf462088d13	801	mbedtls_ssl_transform transform_negotiate; /!< transform params in negotiation */
markrad	0:cdf462088d13	802
markrad	0:cdf462088d13	803	/*
markrad	0:cdf462088d13	804	* Timers
markrad	0:cdf462088d13	805	*/
markrad	0:cdf462088d13	806	void p_timer; /!< context for the timer callbacks */
markrad	0:cdf462088d13	807
markrad	0:cdf462088d13	808	mbedtls_ssl_set_timer_t f_set_timer; /!< set timer callback */
markrad	0:cdf462088d13	809	mbedtls_ssl_get_timer_t f_get_timer; /!< get timer callback */
markrad	0:cdf462088d13	810
markrad	0:cdf462088d13	811	/*
markrad	0:cdf462088d13	812	* Record layer (incoming data)
markrad	0:cdf462088d13	813	*/
markrad	0:cdf462088d13	814	unsigned char in_buf; /!< input buffer */
markrad	0:cdf462088d13	815	unsigned char in_ctr; /!< 64-bit incoming message counter
markrad	0:cdf462088d13	816	TLS: maintained by us
markrad	0:cdf462088d13	817	DTLS: read from peer */
markrad	0:cdf462088d13	818	unsigned char in_hdr; /!< start of record header */
markrad	0:cdf462088d13	819	unsigned char in_len; /!< two-bytes message length field */
markrad	0:cdf462088d13	820	unsigned char in_iv; /!< ivlen-byte IV */
markrad	0:cdf462088d13	821	unsigned char in_msg; /!< message contents (in_iv+ivlen) */
markrad	0:cdf462088d13	822	unsigned char in_offt; /!< read offset in application data */
markrad	0:cdf462088d13	823
markrad	0:cdf462088d13	824	int in_msgtype; /!< record header: message type /
markrad	0:cdf462088d13	825	size_t in_msglen; /!< record header: message length /
markrad	0:cdf462088d13	826	size_t in_left; /!< amount of data read so far /
markrad	0:cdf462088d13	827	#if defined(MBEDTLS_SSL_PROTO_DTLS)
markrad	0:cdf462088d13	828	uint16_t in_epoch; /!< DTLS epoch for incoming records /
markrad	0:cdf462088d13	829	size_t next_record_offset; /*!< offset of the next record in datagram
markrad	0:cdf462088d13	830	(equal to in_left if none) */
markrad	0:cdf462088d13	831	#endif
markrad	0:cdf462088d13	832	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
markrad	0:cdf462088d13	833	uint64_t in_window_top; /!< last validated record seq_num /
markrad	0:cdf462088d13	834	uint64_t in_window; /!< bitmask for replay detection /
markrad	0:cdf462088d13	835	#endif
markrad	0:cdf462088d13	836
markrad	0:cdf462088d13	837	size_t in_hslen; /*!< current handshake message length,
markrad	0:cdf462088d13	838	including the handshake header */
markrad	0:cdf462088d13	839	int nb_zero; /!< # of 0-length encrypted messages /
markrad	0:cdf462088d13	840	int record_read; /!< record is already present /
markrad	0:cdf462088d13	841
markrad	0:cdf462088d13	842	/*
markrad	0:cdf462088d13	843	* Record layer (outgoing data)
markrad	0:cdf462088d13	844	*/
markrad	0:cdf462088d13	845	unsigned char out_buf; /!< output buffer */
markrad	0:cdf462088d13	846	unsigned char out_ctr; /!< 64-bit outgoing message counter */
markrad	0:cdf462088d13	847	unsigned char out_hdr; /!< start of record header */
markrad	0:cdf462088d13	848	unsigned char out_len; /!< two-bytes message length field */
markrad	0:cdf462088d13	849	unsigned char out_iv; /!< ivlen-byte IV */
markrad	0:cdf462088d13	850	unsigned char out_msg; /!< message contents (out_iv+ivlen) */
markrad	0:cdf462088d13	851
markrad	0:cdf462088d13	852	int out_msgtype; /!< record header: message type /
markrad	0:cdf462088d13	853	size_t out_msglen; /!< record header: message length /
markrad	0:cdf462088d13	854	size_t out_left; /!< amount of data not yet written /
markrad	0:cdf462088d13	855
markrad	0:cdf462088d13	856	#if defined(MBEDTLS_ZLIB_SUPPORT)
markrad	0:cdf462088d13	857	unsigned char compress_buf; /!< zlib data buffer */
markrad	0:cdf462088d13	858	#endif
markrad	0:cdf462088d13	859	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
markrad	0:cdf462088d13	860	signed char split_done; /!< current record already splitted? /
markrad	0:cdf462088d13	861	#endif
markrad	0:cdf462088d13	862
markrad	0:cdf462088d13	863	/*
markrad	0:cdf462088d13	864	* PKI layer
markrad	0:cdf462088d13	865	*/
markrad	0:cdf462088d13	866	int client_auth; /!< flag for client auth. /
markrad	0:cdf462088d13	867
markrad	0:cdf462088d13	868	/*
markrad	0:cdf462088d13	869	* User settings
markrad	0:cdf462088d13	870	*/
markrad	0:cdf462088d13	871	#if defined(MBEDTLS_X509_CRT_PARSE_C)
markrad	0:cdf462088d13	872	char hostname; /!< expected peer CN for verification
markrad	0:cdf462088d13	873	(and SNI if available) */
markrad	0:cdf462088d13	874	#endif
markrad	0:cdf462088d13	875
markrad	0:cdf462088d13	876	#if defined(MBEDTLS_SSL_ALPN)
markrad	0:cdf462088d13	877	const char alpn_chosen; /!< negotiated protocol */
markrad	0:cdf462088d13	878	#endif
markrad	0:cdf462088d13	879
markrad	0:cdf462088d13	880	/*
markrad	0:cdf462088d13	881	* Information for DTLS hello verify
markrad	0:cdf462088d13	882	*/
markrad	0:cdf462088d13	883	#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
markrad	0:cdf462088d13	884	unsigned char cli_id; /!< transport-level ID of the client */
markrad	0:cdf462088d13	885	size_t cli_id_len; /!< length of cli_id /
markrad	0:cdf462088d13	886	#endif
markrad	0:cdf462088d13	887
markrad	0:cdf462088d13	888	/*
markrad	0:cdf462088d13	889	* Secure renegotiation
markrad	0:cdf462088d13	890	*/
markrad	0:cdf462088d13	891	/* needed to know when to send extension on server */
markrad	0:cdf462088d13	892	int secure_renegotiation; /*!< does peer support legacy or
markrad	0:cdf462088d13	893	secure renegotiation */
markrad	0:cdf462088d13	894	#if defined(MBEDTLS_SSL_RENEGOTIATION)
markrad	0:cdf462088d13	895	size_t verify_data_len; /!< length of verify data stored /
markrad	0:cdf462088d13	896	char own_verify_data[MBEDTLS_SSL_VERIFY_DATA_MAX_LEN]; /!< previous handshake verify data /
markrad	0:cdf462088d13	897	char peer_verify_data[MBEDTLS_SSL_VERIFY_DATA_MAX_LEN]; /!< previous handshake verify data /
markrad	0:cdf462088d13	898	#endif
markrad	0:cdf462088d13	899	};
markrad	0:cdf462088d13	900
markrad	0:cdf462088d13	901	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
markrad	0:cdf462088d13	902
markrad	0:cdf462088d13	903	#define MBEDTLS_SSL_CHANNEL_OUTBOUND 0
markrad	0:cdf462088d13	904	#define MBEDTLS_SSL_CHANNEL_INBOUND 1
markrad	0:cdf462088d13	905
markrad	0:cdf462088d13	906	extern int (mbedtls_ssl_hw_record_init)(mbedtls_ssl_context ssl,
markrad	0:cdf462088d13	907	const unsigned char key_enc, const unsigned char key_dec,
markrad	0:cdf462088d13	908	size_t keylen,
markrad	0:cdf462088d13	909	const unsigned char iv_enc, const unsigned char iv_dec,
markrad	0:cdf462088d13	910	size_t ivlen,
markrad	0:cdf462088d13	911	const unsigned char mac_enc, const unsigned char mac_dec,
markrad	0:cdf462088d13	912	size_t maclen);
markrad	0:cdf462088d13	913	extern int (mbedtls_ssl_hw_record_activate)(mbedtls_ssl_context ssl, int direction);
markrad	0:cdf462088d13	914	extern int (mbedtls_ssl_hw_record_reset)(mbedtls_ssl_context ssl);
markrad	0:cdf462088d13	915	extern int (mbedtls_ssl_hw_record_write)(mbedtls_ssl_context ssl);
markrad	0:cdf462088d13	916	extern int (mbedtls_ssl_hw_record_read)(mbedtls_ssl_context ssl);
markrad	0:cdf462088d13	917	extern int (mbedtls_ssl_hw_record_finish)(mbedtls_ssl_context ssl);
markrad	0:cdf462088d13	918	#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */
markrad	0:cdf462088d13	919
markrad	0:cdf462088d13	920	/**
markrad	0:cdf462088d13	921	* \brief Returns the list of ciphersuites supported by the SSL/TLS module.
markrad	0:cdf462088d13	922	*
markrad	0:cdf462088d13	923	* \return a statically allocated array of ciphersuites, the last
markrad	0:cdf462088d13	924	* entry is 0.
markrad	0:cdf462088d13	925	*/
markrad	0:cdf462088d13	926	const int *mbedtls_ssl_list_ciphersuites( void );
markrad	0:cdf462088d13	927
markrad	0:cdf462088d13	928	/**
markrad	0:cdf462088d13	929	* \brief Return the name of the ciphersuite associated with the
markrad	0:cdf462088d13	930	* given ID
markrad	0:cdf462088d13	931	*
markrad	0:cdf462088d13	932	* \param ciphersuite_id SSL ciphersuite ID
markrad	0:cdf462088d13	933	*
markrad	0:cdf462088d13	934	* \return a string containing the ciphersuite name
markrad	0:cdf462088d13	935	*/
markrad	0:cdf462088d13	936	const char *mbedtls_ssl_get_ciphersuite_name( const int ciphersuite_id );
markrad	0:cdf462088d13	937
markrad	0:cdf462088d13	938	/**
markrad	0:cdf462088d13	939	* \brief Return the ID of the ciphersuite associated with the
markrad	0:cdf462088d13	940	* given name
markrad	0:cdf462088d13	941	*
markrad	0:cdf462088d13	942	* \param ciphersuite_name SSL ciphersuite name
markrad	0:cdf462088d13	943	*
markrad	0:cdf462088d13	944	* \return the ID with the ciphersuite or 0 if not found
markrad	0:cdf462088d13	945	*/
markrad	0:cdf462088d13	946	int mbedtls_ssl_get_ciphersuite_id( const char *ciphersuite_name );
markrad	0:cdf462088d13	947
markrad	0:cdf462088d13	948	/**
markrad	0:cdf462088d13	949	* \brief Initialize an SSL context
markrad	0:cdf462088d13	950	* Just makes the context ready for mbedtls_ssl_setup() or
markrad	0:cdf462088d13	951	* mbedtls_ssl_free()
markrad	0:cdf462088d13	952	*
markrad	0:cdf462088d13	953	* \param ssl SSL context
markrad	0:cdf462088d13	954	*/
markrad	0:cdf462088d13	955	void mbedtls_ssl_init( mbedtls_ssl_context *ssl );
markrad	0:cdf462088d13	956
markrad	0:cdf462088d13	957	/**
markrad	0:cdf462088d13	958	* \brief Set up an SSL context for use
markrad	0:cdf462088d13	959	*
markrad	0:cdf462088d13	960	* \note No copy of the configuration context is made, it can be
markrad	0:cdf462088d13	961	* shared by many mbedtls_ssl_context structures.
markrad	0:cdf462088d13	962	*
markrad	0:cdf462088d13	963	* \warning Modifying the conf structure after it has been used in this
markrad	0:cdf462088d13	964	* function is unsupported!
markrad	0:cdf462088d13	965	*
markrad	0:cdf462088d13	966	* \param ssl SSL context
markrad	0:cdf462088d13	967	* \param conf SSL configuration to use
markrad	0:cdf462088d13	968	*
markrad	0:cdf462088d13	969	* \return 0 if successful, or MBEDTLS_ERR_SSL_ALLOC_FAILED if
markrad	0:cdf462088d13	970	* memory allocation failed
markrad	0:cdf462088d13	971	*/
markrad	0:cdf462088d13	972	int mbedtls_ssl_setup( mbedtls_ssl_context *ssl,
markrad	0:cdf462088d13	973	const mbedtls_ssl_config *conf );
markrad	0:cdf462088d13	974
markrad	0:cdf462088d13	975	/**
markrad	0:cdf462088d13	976	* \brief Reset an already initialized SSL context for re-use
markrad	0:cdf462088d13	977	* while retaining application-set variables, function
markrad	0:cdf462088d13	978	* pointers and data.
markrad	0:cdf462088d13	979	*
markrad	0:cdf462088d13	980	* \param ssl SSL context
markrad	0:cdf462088d13	981	* \return 0 if successful, or MBEDTLS_ERR_SSL_ALLOC_FAILED,
markrad	0:cdf462088d13	982	MBEDTLS_ERR_SSL_HW_ACCEL_FAILED or
markrad	0:cdf462088d13	983	* MBEDTLS_ERR_SSL_COMPRESSION_FAILED
markrad	0:cdf462088d13	984	*/
markrad	0:cdf462088d13	985	int mbedtls_ssl_session_reset( mbedtls_ssl_context *ssl );
markrad	0:cdf462088d13	986
markrad	0:cdf462088d13	987	/**
markrad	0:cdf462088d13	988	* \brief Set the current endpoint type
markrad	0:cdf462088d13	989	*
markrad	0:cdf462088d13	990	* \param conf SSL configuration
markrad	0:cdf462088d13	991	* \param endpoint must be MBEDTLS_SSL_IS_CLIENT or MBEDTLS_SSL_IS_SERVER
markrad	0:cdf462088d13	992	*/
markrad	0:cdf462088d13	993	void mbedtls_ssl_conf_endpoint( mbedtls_ssl_config *conf, int endpoint );
markrad	0:cdf462088d13	994
markrad	0:cdf462088d13	995	/**
markrad	0:cdf462088d13	996	* \brief Set the transport type (TLS or DTLS).
markrad	0:cdf462088d13	997	* Default: TLS
markrad	0:cdf462088d13	998	*
markrad	0:cdf462088d13	999	* \note For DTLS, you must either provide a recv callback that
markrad	0:cdf462088d13	1000	* doesn't block, or one that handles timeouts, see
markrad	0:cdf462088d13	1001	* \c mbedtls_ssl_set_bio(). You also need to provide timer
markrad	0:cdf462088d13	1002	* callbacks with \c mbedtls_ssl_set_timer_cb().
markrad	0:cdf462088d13	1003	*
markrad	0:cdf462088d13	1004	* \param conf SSL configuration
markrad	0:cdf462088d13	1005	* \param transport transport type:
markrad	0:cdf462088d13	1006	* MBEDTLS_SSL_TRANSPORT_STREAM for TLS,
markrad	0:cdf462088d13	1007	* MBEDTLS_SSL_TRANSPORT_DATAGRAM for DTLS.
markrad	0:cdf462088d13	1008	*/
markrad	0:cdf462088d13	1009	void mbedtls_ssl_conf_transport( mbedtls_ssl_config *conf, int transport );
markrad	0:cdf462088d13	1010
markrad	0:cdf462088d13	1011	/**
markrad	0:cdf462088d13	1012	* \brief Set the certificate verification mode
markrad	0:cdf462088d13	1013	* Default: NONE on server, REQUIRED on client
markrad	0:cdf462088d13	1014	*
markrad	0:cdf462088d13	1015	* \param conf SSL configuration
markrad	0:cdf462088d13	1016	* \param authmode can be:
markrad	0:cdf462088d13	1017	*
markrad	0:cdf462088d13	1018	* MBEDTLS_SSL_VERIFY_NONE: peer certificate is not checked
markrad	0:cdf462088d13	1019	* (default on server)
markrad	0:cdf462088d13	1020	* (insecure on client)
markrad	0:cdf462088d13	1021	*
markrad	0:cdf462088d13	1022	* MBEDTLS_SSL_VERIFY_OPTIONAL: peer certificate is checked, however the
markrad	0:cdf462088d13	1023	* handshake continues even if verification failed;
markrad	0:cdf462088d13	1024	* mbedtls_ssl_get_verify_result() can be called after the
markrad	0:cdf462088d13	1025	* handshake is complete.
markrad	0:cdf462088d13	1026	*
markrad	0:cdf462088d13	1027	* MBEDTLS_SSL_VERIFY_REQUIRED: peer must present a valid certificate,
markrad	0:cdf462088d13	1028	* handshake is aborted if verification failed.
markrad	0:cdf462088d13	1029	* (default on client)
markrad	0:cdf462088d13	1030	*
markrad	0:cdf462088d13	1031	* \note On client, MBEDTLS_SSL_VERIFY_REQUIRED is the recommended mode.
markrad	0:cdf462088d13	1032	* With MBEDTLS_SSL_VERIFY_OPTIONAL, the user needs to call mbedtls_ssl_get_verify_result() at
markrad	0:cdf462088d13	1033	* the right time(s), which may not be obvious, while REQUIRED always perform
markrad	0:cdf462088d13	1034	* the verification as soon as possible. For example, REQUIRED was protecting
markrad	0:cdf462088d13	1035	* against the "triple handshake" attack even before it was found.
markrad	0:cdf462088d13	1036	*/
markrad	0:cdf462088d13	1037	void mbedtls_ssl_conf_authmode( mbedtls_ssl_config *conf, int authmode );
markrad	0:cdf462088d13	1038
markrad	0:cdf462088d13	1039	#if defined(MBEDTLS_X509_CRT_PARSE_C)
markrad	0:cdf462088d13	1040	/**
markrad	0:cdf462088d13	1041	* \brief Set the verification callback (Optional).
markrad	0:cdf462088d13	1042	*
markrad	0:cdf462088d13	1043	* If set, the verify callback is called for each
markrad	0:cdf462088d13	1044	* certificate in the chain. For implementation
markrad	0:cdf462088d13	1045	* information, please see \c x509parse_verify()
markrad	0:cdf462088d13	1046	*
markrad	0:cdf462088d13	1047	* \param conf SSL configuration
markrad	0:cdf462088d13	1048	* \param f_vrfy verification function
markrad	0:cdf462088d13	1049	* \param p_vrfy verification parameter
markrad	0:cdf462088d13	1050	*/
markrad	0:cdf462088d13	1051	void mbedtls_ssl_conf_verify( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1052	int (f_vrfy)(void , mbedtls_x509_crt , int, uint32_t ),
markrad	0:cdf462088d13	1053	void *p_vrfy );
markrad	0:cdf462088d13	1054	#endif /* MBEDTLS_X509_CRT_PARSE_C */
markrad	0:cdf462088d13	1055
markrad	0:cdf462088d13	1056	/**
markrad	0:cdf462088d13	1057	* \brief Set the random number generator callback
markrad	0:cdf462088d13	1058	*
markrad	0:cdf462088d13	1059	* \param conf SSL configuration
markrad	0:cdf462088d13	1060	* \param f_rng RNG function
markrad	0:cdf462088d13	1061	* \param p_rng RNG parameter
markrad	0:cdf462088d13	1062	*/
markrad	0:cdf462088d13	1063	void mbedtls_ssl_conf_rng( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1064	int (f_rng)(void , unsigned char *, size_t),
markrad	0:cdf462088d13	1065	void *p_rng );
markrad	0:cdf462088d13	1066
markrad	0:cdf462088d13	1067	/**
markrad	0:cdf462088d13	1068	* \brief Set the debug callback
markrad	0:cdf462088d13	1069	*
markrad	0:cdf462088d13	1070	* The callback has the following argument:
markrad	0:cdf462088d13	1071	* void * opaque context for the callback
markrad	0:cdf462088d13	1072	* int debug level
markrad	0:cdf462088d13	1073	* const char * file name
markrad	0:cdf462088d13	1074	* int line number
markrad	0:cdf462088d13	1075	* const char * message
markrad	0:cdf462088d13	1076	*
markrad	0:cdf462088d13	1077	* \param conf SSL configuration
markrad	0:cdf462088d13	1078	* \param f_dbg debug function
markrad	0:cdf462088d13	1079	* \param p_dbg debug parameter
markrad	0:cdf462088d13	1080	*/
markrad	0:cdf462088d13	1081	void mbedtls_ssl_conf_dbg( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1082	void (f_dbg)(void , int, const char , int, const char ),
markrad	0:cdf462088d13	1083	void *p_dbg );
markrad	0:cdf462088d13	1084
markrad	0:cdf462088d13	1085	/**
markrad	0:cdf462088d13	1086	* \brief Set the underlying BIO callbacks for write, read and
markrad	0:cdf462088d13	1087	* read-with-timeout.
markrad	0:cdf462088d13	1088	*
markrad	0:cdf462088d13	1089	* \param ssl SSL context
markrad	0:cdf462088d13	1090	* \param p_bio parameter (context) shared by BIO callbacks
markrad	0:cdf462088d13	1091	* \param f_send write callback
markrad	0:cdf462088d13	1092	* \param f_recv read callback
markrad	0:cdf462088d13	1093	* \param f_recv_timeout blocking read callback with timeout.
markrad	0:cdf462088d13	1094	*
markrad	0:cdf462088d13	1095	* \note One of f_recv or f_recv_timeout can be NULL, in which case
markrad	0:cdf462088d13	1096	* the other is used. If both are non-NULL, f_recv_timeout is
markrad	0:cdf462088d13	1097	* used and f_recv is ignored (as if it were NULL).
markrad	0:cdf462088d13	1098	*
markrad	0:cdf462088d13	1099	* \note The two most common use cases are:
markrad	0:cdf462088d13	1100	* - non-blocking I/O, f_recv != NULL, f_recv_timeout == NULL
markrad	0:cdf462088d13	1101	* - blocking I/O, f_recv == NULL, f_recv_timout != NULL
markrad	0:cdf462088d13	1102	*
markrad	0:cdf462088d13	1103	* \note For DTLS, you need to provide either a non-NULL
markrad	0:cdf462088d13	1104	* f_recv_timeout callback, or a f_recv that doesn't block.
markrad	0:cdf462088d13	1105	*
markrad	0:cdf462088d13	1106	* \note See the documentations of \c mbedtls_ssl_sent_t,
markrad	0:cdf462088d13	1107	* \c mbedtls_ssl_recv_t and \c mbedtls_ssl_recv_timeout_t for
markrad	0:cdf462088d13	1108	* the conventions those callbacks must follow.
markrad	0:cdf462088d13	1109	*
markrad	0:cdf462088d13	1110	* \note On some platforms, net_sockets.c provides
markrad	0:cdf462088d13	1111	* \c mbedtls_net_send(), \c mbedtls_net_recv() and
markrad	0:cdf462088d13	1112	* \c mbedtls_net_recv_timeout() that are suitable to be used
markrad	0:cdf462088d13	1113	* here.
markrad	0:cdf462088d13	1114	*/
markrad	0:cdf462088d13	1115	void mbedtls_ssl_set_bio( mbedtls_ssl_context *ssl,
markrad	0:cdf462088d13	1116	void *p_bio,
markrad	0:cdf462088d13	1117	mbedtls_ssl_send_t *f_send,
markrad	0:cdf462088d13	1118	mbedtls_ssl_recv_t *f_recv,
markrad	0:cdf462088d13	1119	mbedtls_ssl_recv_timeout_t *f_recv_timeout );
markrad	0:cdf462088d13	1120
markrad	0:cdf462088d13	1121	/**
markrad	0:cdf462088d13	1122	* \brief Set the timeout period for mbedtls_ssl_read()
markrad	0:cdf462088d13	1123	* (Default: no timeout.)
markrad	0:cdf462088d13	1124	*
markrad	0:cdf462088d13	1125	* \param conf SSL configuration context
markrad	0:cdf462088d13	1126	* \param timeout Timeout value in milliseconds.
markrad	0:cdf462088d13	1127	* Use 0 for no timeout (default).
markrad	0:cdf462088d13	1128	*
markrad	0:cdf462088d13	1129	* \note With blocking I/O, this will only work if a non-NULL
markrad	0:cdf462088d13	1130	* \c f_recv_timeout was set with \c mbedtls_ssl_set_bio().
markrad	0:cdf462088d13	1131	* With non-blocking I/O, this will only work if timer
markrad	0:cdf462088d13	1132	* callbacks were set with \c mbedtls_ssl_set_timer_cb().
markrad	0:cdf462088d13	1133	*
markrad	0:cdf462088d13	1134	* \note With non-blocking I/O, you may also skip this function
markrad	0:cdf462088d13	1135	* altogether and handle timeouts at the application layer.
markrad	0:cdf462088d13	1136	*/
markrad	0:cdf462088d13	1137	void mbedtls_ssl_conf_read_timeout( mbedtls_ssl_config *conf, uint32_t timeout );
markrad	0:cdf462088d13	1138
markrad	0:cdf462088d13	1139	/**
markrad	0:cdf462088d13	1140	* \brief Set the timer callbacks (Mandatory for DTLS.)
markrad	0:cdf462088d13	1141	*
markrad	0:cdf462088d13	1142	* \param ssl SSL context
markrad	0:cdf462088d13	1143	* \param p_timer parameter (context) shared by timer callbacks
markrad	0:cdf462088d13	1144	* \param f_set_timer set timer callback
markrad	0:cdf462088d13	1145	* \param f_get_timer get timer callback. Must return:
markrad	0:cdf462088d13	1146	*
markrad	0:cdf462088d13	1147	* \note See the documentation of \c mbedtls_ssl_set_timer_t and
markrad	0:cdf462088d13	1148	* \c mbedtls_ssl_get_timer_t for the conventions this pair of
markrad	0:cdf462088d13	1149	* callbacks must fallow.
markrad	0:cdf462088d13	1150	*
markrad	0:cdf462088d13	1151	* \note On some platforms, timing.c provides
markrad	0:cdf462088d13	1152	* \c mbedtls_timing_set_delay() and
markrad	0:cdf462088d13	1153	* \c mbedtls_timing_get_delay() that are suitable for using
markrad	0:cdf462088d13	1154	* here, except if using an event-driven style.
markrad	0:cdf462088d13	1155	*
markrad	0:cdf462088d13	1156	* \note See also the "DTLS tutorial" article in our knowledge base.
markrad	0:cdf462088d13	1157	* https://tls.mbed.org/kb/how-to/dtls-tutorial
markrad	0:cdf462088d13	1158	*/
markrad	0:cdf462088d13	1159	void mbedtls_ssl_set_timer_cb( mbedtls_ssl_context *ssl,
markrad	0:cdf462088d13	1160	void *p_timer,
markrad	0:cdf462088d13	1161	mbedtls_ssl_set_timer_t *f_set_timer,
markrad	0:cdf462088d13	1162	mbedtls_ssl_get_timer_t *f_get_timer );
markrad	0:cdf462088d13	1163
markrad	0:cdf462088d13	1164	/**
markrad	0:cdf462088d13	1165	* \brief Callback type: generate and write session ticket
markrad	0:cdf462088d13	1166	*
markrad	0:cdf462088d13	1167	* \note This describes what a callback implementation should do.
markrad	0:cdf462088d13	1168	* This callback should generate an encrypted and
markrad	0:cdf462088d13	1169	* authenticated ticket for the session and write it to the
markrad	0:cdf462088d13	1170	* output buffer. Here, ticket means the opaque ticket part
markrad	0:cdf462088d13	1171	* of the NewSessionTicket structure of RFC 5077.
markrad	0:cdf462088d13	1172	*
markrad	0:cdf462088d13	1173	* \param p_ticket Context for the callback
markrad	0:cdf462088d13	1174	* \param session SSL session to be written in the ticket
markrad	0:cdf462088d13	1175	* \param start Start of the output buffer
markrad	0:cdf462088d13	1176	* \param end End of the output buffer
markrad	0:cdf462088d13	1177	* \param tlen On exit, holds the length written
markrad	0:cdf462088d13	1178	* \param lifetime On exit, holds the lifetime of the ticket in seconds
markrad	0:cdf462088d13	1179	*
markrad	0:cdf462088d13	1180	* \return 0 if successful, or
markrad	0:cdf462088d13	1181	* a specific MBEDTLS_ERR_XXX code.
markrad	0:cdf462088d13	1182	*/
markrad	0:cdf462088d13	1183	typedef int mbedtls_ssl_ticket_write_t( void *p_ticket,
markrad	0:cdf462088d13	1184	const mbedtls_ssl_session *session,
markrad	0:cdf462088d13	1185	unsigned char *start,
markrad	0:cdf462088d13	1186	const unsigned char *end,
markrad	0:cdf462088d13	1187	size_t *tlen,
markrad	0:cdf462088d13	1188	uint32_t *lifetime );
markrad	0:cdf462088d13	1189
markrad	0:cdf462088d13	1190	#if defined(MBEDTLS_SSL_EXPORT_KEYS)
markrad	0:cdf462088d13	1191	/**
markrad	0:cdf462088d13	1192	* \brief Callback type: Export key block and master secret
markrad	0:cdf462088d13	1193	*
markrad	0:cdf462088d13	1194	* \note This is required for certain uses of TLS, e.g. EAP-TLS
markrad	0:cdf462088d13	1195	* (RFC 5216) and Thread. The key pointers are ephemeral and
markrad	0:cdf462088d13	1196	* therefore must not be stored. The master secret and keys
markrad	0:cdf462088d13	1197	* should not be used directly except as an input to a key
markrad	0:cdf462088d13	1198	* derivation function.
markrad	0:cdf462088d13	1199	*
markrad	0:cdf462088d13	1200	* \param p_expkey Context for the callback
markrad	0:cdf462088d13	1201	* \param ms Pointer to master secret (fixed length: 48 bytes)
markrad	0:cdf462088d13	1202	* \param kb Pointer to key block, see RFC 5246 section 6.3
markrad	0:cdf462088d13	1203	* (variable length: 2 * maclen + 2 * keylen + 2 * ivlen).
markrad	0:cdf462088d13	1204	* \param maclen MAC length
markrad	0:cdf462088d13	1205	* \param keylen Key length
markrad	0:cdf462088d13	1206	* \param ivlen IV length
markrad	0:cdf462088d13	1207	*
markrad	0:cdf462088d13	1208	* \return 0 if successful, or
markrad	0:cdf462088d13	1209	* a specific MBEDTLS_ERR_XXX code.
markrad	0:cdf462088d13	1210	*/
markrad	0:cdf462088d13	1211	typedef int mbedtls_ssl_export_keys_t( void *p_expkey,
markrad	0:cdf462088d13	1212	const unsigned char *ms,
markrad	0:cdf462088d13	1213	const unsigned char *kb,
markrad	0:cdf462088d13	1214	size_t maclen,
markrad	0:cdf462088d13	1215	size_t keylen,
markrad	0:cdf462088d13	1216	size_t ivlen );
markrad	0:cdf462088d13	1217	#endif /* MBEDTLS_SSL_EXPORT_KEYS */
markrad	0:cdf462088d13	1218
markrad	0:cdf462088d13	1219	/**
markrad	0:cdf462088d13	1220	* \brief Callback type: parse and load session ticket
markrad	0:cdf462088d13	1221	*
markrad	0:cdf462088d13	1222	* \note This describes what a callback implementation should do.
markrad	0:cdf462088d13	1223	* This callback should parse a session ticket as generated
markrad	0:cdf462088d13	1224	* by the corresponding mbedtls_ssl_ticket_write_t function,
markrad	0:cdf462088d13	1225	* and, if the ticket is authentic and valid, load the
markrad	0:cdf462088d13	1226	* session.
markrad	0:cdf462088d13	1227	*
markrad	0:cdf462088d13	1228	* \note The implementation is allowed to modify the first len
markrad	0:cdf462088d13	1229	* bytes of the input buffer, eg to use it as a temporary
markrad	0:cdf462088d13	1230	* area for the decrypted ticket contents.
markrad	0:cdf462088d13	1231	*
markrad	0:cdf462088d13	1232	* \param p_ticket Context for the callback
markrad	0:cdf462088d13	1233	* \param session SSL session to be loaded
markrad	0:cdf462088d13	1234	* \param buf Start of the buffer containing the ticket
markrad	0:cdf462088d13	1235	* \param len Length of the ticket.
markrad	0:cdf462088d13	1236	*
markrad	0:cdf462088d13	1237	* \return 0 if successful, or
markrad	0:cdf462088d13	1238	* MBEDTLS_ERR_SSL_INVALID_MAC if not authentic, or
markrad	0:cdf462088d13	1239	* MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED if expired, or
markrad	0:cdf462088d13	1240	* any other non-zero code for other failures.
markrad	0:cdf462088d13	1241	*/
markrad	0:cdf462088d13	1242	typedef int mbedtls_ssl_ticket_parse_t( void *p_ticket,
markrad	0:cdf462088d13	1243	mbedtls_ssl_session *session,
markrad	0:cdf462088d13	1244	unsigned char *buf,
markrad	0:cdf462088d13	1245	size_t len );
markrad	0:cdf462088d13	1246
markrad	0:cdf462088d13	1247	#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_SRV_C)
markrad	0:cdf462088d13	1248	/**
markrad	0:cdf462088d13	1249	* \brief Configure SSL session ticket callbacks (server only).
markrad	0:cdf462088d13	1250	* (Default: none.)
markrad	0:cdf462088d13	1251	*
markrad	0:cdf462088d13	1252	* \note On server, session tickets are enabled by providing
markrad	0:cdf462088d13	1253	* non-NULL callbacks.
markrad	0:cdf462088d13	1254	*
markrad	0:cdf462088d13	1255	* \note On client, use \c mbedtls_ssl_conf_session_tickets().
markrad	0:cdf462088d13	1256	*
markrad	0:cdf462088d13	1257	* \param conf SSL configuration context
markrad	0:cdf462088d13	1258	* \param f_ticket_write Callback for writing a ticket
markrad	0:cdf462088d13	1259	* \param f_ticket_parse Callback for parsing a ticket
markrad	0:cdf462088d13	1260	* \param p_ticket Context shared by the two callbacks
markrad	0:cdf462088d13	1261	*/
markrad	0:cdf462088d13	1262	void mbedtls_ssl_conf_session_tickets_cb( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1263	mbedtls_ssl_ticket_write_t *f_ticket_write,
markrad	0:cdf462088d13	1264	mbedtls_ssl_ticket_parse_t *f_ticket_parse,
markrad	0:cdf462088d13	1265	void *p_ticket );
markrad	0:cdf462088d13	1266	#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_SRV_C */
markrad	0:cdf462088d13	1267
markrad	0:cdf462088d13	1268	#if defined(MBEDTLS_SSL_EXPORT_KEYS)
markrad	0:cdf462088d13	1269	/**
markrad	0:cdf462088d13	1270	* \brief Configure key export callback.
markrad	0:cdf462088d13	1271	* (Default: none.)
markrad	0:cdf462088d13	1272	*
markrad	0:cdf462088d13	1273	* \note See \c mbedtls_ssl_export_keys_t.
markrad	0:cdf462088d13	1274	*
markrad	0:cdf462088d13	1275	* \param conf SSL configuration context
markrad	0:cdf462088d13	1276	* \param f_export_keys Callback for exporting keys
markrad	0:cdf462088d13	1277	* \param p_export_keys Context for the callback
markrad	0:cdf462088d13	1278	*/
markrad	0:cdf462088d13	1279	void mbedtls_ssl_conf_export_keys_cb( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1280	mbedtls_ssl_export_keys_t *f_export_keys,
markrad	0:cdf462088d13	1281	void *p_export_keys );
markrad	0:cdf462088d13	1282	#endif /* MBEDTLS_SSL_EXPORT_KEYS */
markrad	0:cdf462088d13	1283
markrad	0:cdf462088d13	1284	/**
markrad	0:cdf462088d13	1285	* \brief Callback type: generate a cookie
markrad	0:cdf462088d13	1286	*
markrad	0:cdf462088d13	1287	* \param ctx Context for the callback
markrad	0:cdf462088d13	1288	* \param p Buffer to write to,
markrad	0:cdf462088d13	1289	* must be updated to point right after the cookie
markrad	0:cdf462088d13	1290	* \param end Pointer to one past the end of the output buffer
markrad	0:cdf462088d13	1291	* \param info Client ID info that was passed to
markrad	0:cdf462088d13	1292	* \c mbedtls_ssl_set_client_transport_id()
markrad	0:cdf462088d13	1293	* \param ilen Length of info in bytes
markrad	0:cdf462088d13	1294	*
markrad	0:cdf462088d13	1295	* \return The callback must return 0 on success,
markrad	0:cdf462088d13	1296	* or a negative error code.
markrad	0:cdf462088d13	1297	*/
markrad	0:cdf462088d13	1298	typedef int mbedtls_ssl_cookie_write_t( void *ctx,
markrad	0:cdf462088d13	1299	unsigned char *p, unsigned char end,
markrad	0:cdf462088d13	1300	const unsigned char *info, size_t ilen );
markrad	0:cdf462088d13	1301
markrad	0:cdf462088d13	1302	/**
markrad	0:cdf462088d13	1303	* \brief Callback type: verify a cookie
markrad	0:cdf462088d13	1304	*
markrad	0:cdf462088d13	1305	* \param ctx Context for the callback
markrad	0:cdf462088d13	1306	* \param cookie Cookie to verify
markrad	0:cdf462088d13	1307	* \param clen Length of cookie
markrad	0:cdf462088d13	1308	* \param info Client ID info that was passed to
markrad	0:cdf462088d13	1309	* \c mbedtls_ssl_set_client_transport_id()
markrad	0:cdf462088d13	1310	* \param ilen Length of info in bytes
markrad	0:cdf462088d13	1311	*
markrad	0:cdf462088d13	1312	* \return The callback must return 0 if cookie is valid,
markrad	0:cdf462088d13	1313	* or a negative error code.
markrad	0:cdf462088d13	1314	*/
markrad	0:cdf462088d13	1315	typedef int mbedtls_ssl_cookie_check_t( void *ctx,
markrad	0:cdf462088d13	1316	const unsigned char *cookie, size_t clen,
markrad	0:cdf462088d13	1317	const unsigned char *info, size_t ilen );
markrad	0:cdf462088d13	1318
markrad	0:cdf462088d13	1319	#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
markrad	0:cdf462088d13	1320	/**
markrad	0:cdf462088d13	1321	* \brief Register callbacks for DTLS cookies
markrad	0:cdf462088d13	1322	* (Server only. DTLS only.)
markrad	0:cdf462088d13	1323	*
markrad	0:cdf462088d13	1324	* Default: dummy callbacks that fail, in order to force you to
markrad	0:cdf462088d13	1325	* register working callbacks (and initialize their context).
markrad	0:cdf462088d13	1326	*
markrad	0:cdf462088d13	1327	* To disable HelloVerifyRequest, register NULL callbacks.
markrad	0:cdf462088d13	1328	*
markrad	0:cdf462088d13	1329	* \warning Disabling hello verification allows your server to be used
markrad	0:cdf462088d13	1330	* for amplification in DoS attacks against other hosts.
markrad	0:cdf462088d13	1331	* Only disable if you known this can't happen in your
markrad	0:cdf462088d13	1332	* particular environment.
markrad	0:cdf462088d13	1333	*
markrad	0:cdf462088d13	1334	* \note See comments on \c mbedtls_ssl_handshake() about handling
markrad	0:cdf462088d13	1335	* the MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED that is expected
markrad	0:cdf462088d13	1336	* on the first handshake attempt when this is enabled.
markrad	0:cdf462088d13	1337	*
markrad	0:cdf462088d13	1338	* \note This is also necessary to handle client reconnection from
markrad	0:cdf462088d13	1339	* the same port as described in RFC 6347 section 4.2.8 (only
markrad	0:cdf462088d13	1340	* the variant with cookies is supported currently). See
markrad	0:cdf462088d13	1341	* comments on \c mbedtls_ssl_read() for details.
markrad	0:cdf462088d13	1342	*
markrad	0:cdf462088d13	1343	* \param conf SSL configuration
markrad	0:cdf462088d13	1344	* \param f_cookie_write Cookie write callback
markrad	0:cdf462088d13	1345	* \param f_cookie_check Cookie check callback
markrad	0:cdf462088d13	1346	* \param p_cookie Context for both callbacks
markrad	0:cdf462088d13	1347	*/
markrad	0:cdf462088d13	1348	void mbedtls_ssl_conf_dtls_cookies( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1349	mbedtls_ssl_cookie_write_t *f_cookie_write,
markrad	0:cdf462088d13	1350	mbedtls_ssl_cookie_check_t *f_cookie_check,
markrad	0:cdf462088d13	1351	void *p_cookie );
markrad	0:cdf462088d13	1352
markrad	0:cdf462088d13	1353	/**
markrad	0:cdf462088d13	1354	* \brief Set client's transport-level identification info.
markrad	0:cdf462088d13	1355	* (Server only. DTLS only.)
markrad	0:cdf462088d13	1356	*
markrad	0:cdf462088d13	1357	* This is usually the IP address (and port), but could be
markrad	0:cdf462088d13	1358	* anything identify the client depending on the underlying
markrad	0:cdf462088d13	1359	* network stack. Used for HelloVerifyRequest with DTLS.
markrad	0:cdf462088d13	1360	* This is not used to route the actual packets.
markrad	0:cdf462088d13	1361	*
markrad	0:cdf462088d13	1362	* \param ssl SSL context
markrad	0:cdf462088d13	1363	* \param info Transport-level info identifying the client (eg IP + port)
markrad	0:cdf462088d13	1364	* \param ilen Length of info in bytes
markrad	0:cdf462088d13	1365	*
markrad	0:cdf462088d13	1366	* \note An internal copy is made, so the info buffer can be reused.
markrad	0:cdf462088d13	1367	*
markrad	0:cdf462088d13	1368	* \return 0 on success,
markrad	0:cdf462088d13	1369	* MBEDTLS_ERR_SSL_BAD_INPUT_DATA if used on client,
markrad	0:cdf462088d13	1370	* MBEDTLS_ERR_SSL_ALLOC_FAILED if out of memory.
markrad	0:cdf462088d13	1371	*/
markrad	0:cdf462088d13	1372	int mbedtls_ssl_set_client_transport_id( mbedtls_ssl_context *ssl,
markrad	0:cdf462088d13	1373	const unsigned char *info,
markrad	0:cdf462088d13	1374	size_t ilen );
markrad	0:cdf462088d13	1375
markrad	0:cdf462088d13	1376	#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY && MBEDTLS_SSL_SRV_C */
markrad	0:cdf462088d13	1377
markrad	0:cdf462088d13	1378	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
markrad	0:cdf462088d13	1379	/**
markrad	0:cdf462088d13	1380	* \brief Enable or disable anti-replay protection for DTLS.
markrad	0:cdf462088d13	1381	* (DTLS only, no effect on TLS.)
markrad	0:cdf462088d13	1382	* Default: enabled.
markrad	0:cdf462088d13	1383	*
markrad	0:cdf462088d13	1384	* \param conf SSL configuration
markrad	0:cdf462088d13	1385	* \param mode MBEDTLS_SSL_ANTI_REPLAY_ENABLED or MBEDTLS_SSL_ANTI_REPLAY_DISABLED.
markrad	0:cdf462088d13	1386	*
markrad	0:cdf462088d13	1387	* \warning Disabling this is a security risk unless the application
markrad	0:cdf462088d13	1388	* protocol handles duplicated packets in a safe way. You
markrad	0:cdf462088d13	1389	* should not disable this without careful consideration.
markrad	0:cdf462088d13	1390	* However, if your application already detects duplicated
markrad	0:cdf462088d13	1391	* packets and needs information about them to adjust its
markrad	0:cdf462088d13	1392	* transmission strategy, then you'll want to disable this.
markrad	0:cdf462088d13	1393	*/
markrad	0:cdf462088d13	1394	void mbedtls_ssl_conf_dtls_anti_replay( mbedtls_ssl_config *conf, char mode );
markrad	0:cdf462088d13	1395	#endif /* MBEDTLS_SSL_DTLS_ANTI_REPLAY */
markrad	0:cdf462088d13	1396
markrad	0:cdf462088d13	1397	#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
markrad	0:cdf462088d13	1398	/**
markrad	0:cdf462088d13	1399	* \brief Set a limit on the number of records with a bad MAC
markrad	0:cdf462088d13	1400	* before terminating the connection.
markrad	0:cdf462088d13	1401	* (DTLS only, no effect on TLS.)
markrad	0:cdf462088d13	1402	* Default: 0 (disabled).
markrad	0:cdf462088d13	1403	*
markrad	0:cdf462088d13	1404	* \param conf SSL configuration
markrad	0:cdf462088d13	1405	* \param limit Limit, or 0 to disable.
markrad	0:cdf462088d13	1406	*
markrad	0:cdf462088d13	1407	* \note If the limit is N, then the connection is terminated when
markrad	0:cdf462088d13	1408	* the Nth non-authentic record is seen.
markrad	0:cdf462088d13	1409	*
markrad	0:cdf462088d13	1410	* \note Records with an invalid header are not counted, only the
markrad	0:cdf462088d13	1411	* ones going through the authentication-decryption phase.
markrad	0:cdf462088d13	1412	*
markrad	0:cdf462088d13	1413	* \note This is a security trade-off related to the fact that it's
markrad	0:cdf462088d13	1414	* often relatively easy for an active attacker ot inject UDP
markrad	0:cdf462088d13	1415	* datagrams. On one hand, setting a low limit here makes it
markrad	0:cdf462088d13	1416	* easier for such an attacker to forcibly terminated a
markrad	0:cdf462088d13	1417	* connection. On the other hand, a high limit or no limit
markrad	0:cdf462088d13	1418	* might make us waste resources checking authentication on
markrad	0:cdf462088d13	1419	* many bogus packets.
markrad	0:cdf462088d13	1420	*/
markrad	0:cdf462088d13	1421	void mbedtls_ssl_conf_dtls_badmac_limit( mbedtls_ssl_config *conf, unsigned limit );
markrad	0:cdf462088d13	1422	#endif /* MBEDTLS_SSL_DTLS_BADMAC_LIMIT */
markrad	0:cdf462088d13	1423
markrad	0:cdf462088d13	1424	#if defined(MBEDTLS_SSL_PROTO_DTLS)
markrad	0:cdf462088d13	1425	/**
markrad	0:cdf462088d13	1426	* \brief Set retransmit timeout values for the DTLS handshake.
markrad	0:cdf462088d13	1427	* (DTLS only, no effect on TLS.)
markrad	0:cdf462088d13	1428	*
markrad	0:cdf462088d13	1429	* \param conf SSL configuration
markrad	0:cdf462088d13	1430	* \param min Initial timeout value in milliseconds.
markrad	0:cdf462088d13	1431	* Default: 1000 (1 second).
markrad	0:cdf462088d13	1432	* \param max Maximum timeout value in milliseconds.
markrad	0:cdf462088d13	1433	* Default: 60000 (60 seconds).
markrad	0:cdf462088d13	1434	*
markrad	0:cdf462088d13	1435	* \note Default values are from RFC 6347 section 4.2.4.1.
markrad	0:cdf462088d13	1436	*
markrad	0:cdf462088d13	1437	* \note The 'min' value should typically be slightly above the
markrad	0:cdf462088d13	1438	* expected round-trip time to your peer, plus whatever time
markrad	0:cdf462088d13	1439	* it takes for the peer to process the message. For example,
markrad	0:cdf462088d13	1440	* if your RTT is about 600ms and you peer needs up to 1s to
markrad	0:cdf462088d13	1441	* do the cryptographic operations in the handshake, then you
markrad	0:cdf462088d13	1442	* should set 'min' slightly above 1600. Lower values of 'min'
markrad	0:cdf462088d13	1443	* might cause spurious resends which waste network resources,
markrad	0:cdf462088d13	1444	* while larger value of 'min' will increase overall latency
markrad	0:cdf462088d13	1445	* on unreliable network links.
markrad	0:cdf462088d13	1446	*
markrad	0:cdf462088d13	1447	* \note The more unreliable your network connection is, the larger
markrad	0:cdf462088d13	1448	* your max / min ratio needs to be in order to achieve
markrad	0:cdf462088d13	1449	* reliable handshakes.
markrad	0:cdf462088d13	1450	*
markrad	0:cdf462088d13	1451	* \note Messages are retransmitted up to log2(ceil(max/min)) times.
markrad	0:cdf462088d13	1452	* For example, if min = 1s and max = 5s, the retransmit plan
markrad	0:cdf462088d13	1453	* goes: send ... 1s -> resend ... 2s -> resend ... 4s ->
markrad	0:cdf462088d13	1454	* resend ... 5s -> give up and return a timeout error.
markrad	0:cdf462088d13	1455	*/
markrad	0:cdf462088d13	1456	void mbedtls_ssl_conf_handshake_timeout( mbedtls_ssl_config *conf, uint32_t min, uint32_t max );
markrad	0:cdf462088d13	1457	#endif /* MBEDTLS_SSL_PROTO_DTLS */
markrad	0:cdf462088d13	1458
markrad	0:cdf462088d13	1459	#if defined(MBEDTLS_SSL_SRV_C)
markrad	0:cdf462088d13	1460	/**
markrad	0:cdf462088d13	1461	* \brief Set the session cache callbacks (server-side only)
markrad	0:cdf462088d13	1462	* If not set, no session resuming is done (except if session
markrad	0:cdf462088d13	1463	* tickets are enabled too).
markrad	0:cdf462088d13	1464	*
markrad	0:cdf462088d13	1465	* The session cache has the responsibility to check for stale
markrad	0:cdf462088d13	1466	* entries based on timeout. See RFC 5246 for recommendations.
markrad	0:cdf462088d13	1467	*
markrad	0:cdf462088d13	1468	* Warning: session.peer_cert is cleared by the SSL/TLS layer on
markrad	0:cdf462088d13	1469	* connection shutdown, so do not cache the pointer! Either set
markrad	0:cdf462088d13	1470	* it to NULL or make a full copy of the certificate.
markrad	0:cdf462088d13	1471	*
markrad	0:cdf462088d13	1472	* The get callback is called once during the initial handshake
markrad	0:cdf462088d13	1473	* to enable session resuming. The get function has the
markrad	0:cdf462088d13	1474	* following parameters: (void parameter, mbedtls_ssl_session session)
markrad	0:cdf462088d13	1475	* If a valid entry is found, it should fill the master of
markrad	0:cdf462088d13	1476	* the session object with the cached values and return 0,
markrad	0:cdf462088d13	1477	* return 1 otherwise. Optionally peer_cert can be set as well
markrad	0:cdf462088d13	1478	* if it is properly present in cache entry.
markrad	0:cdf462088d13	1479	*
markrad	0:cdf462088d13	1480	* The set callback is called once during the initial handshake
markrad	0:cdf462088d13	1481	* to enable session resuming after the entire handshake has
markrad	0:cdf462088d13	1482	* been finished. The set function has the following parameters:
markrad	0:cdf462088d13	1483	* (void parameter, const mbedtls_ssl_session session). The function
markrad	0:cdf462088d13	1484	* should create a cache entry for future retrieval based on
markrad	0:cdf462088d13	1485	* the data in the session structure and should keep in mind
markrad	0:cdf462088d13	1486	* that the mbedtls_ssl_session object presented (and all its referenced
markrad	0:cdf462088d13	1487	* data) is cleared by the SSL/TLS layer when the connection is
markrad	0:cdf462088d13	1488	* terminated. It is recommended to add metadata to determine if
markrad	0:cdf462088d13	1489	* an entry is still valid in the future. Return 0 if
markrad	0:cdf462088d13	1490	* successfully cached, return 1 otherwise.
markrad	0:cdf462088d13	1491	*
markrad	0:cdf462088d13	1492	* \param conf SSL configuration
markrad	0:cdf462088d13	1493	* \param p_cache parmater (context) for both callbacks
markrad	0:cdf462088d13	1494	* \param f_get_cache session get callback
markrad	0:cdf462088d13	1495	* \param f_set_cache session set callback
markrad	0:cdf462088d13	1496	*/
markrad	0:cdf462088d13	1497	void mbedtls_ssl_conf_session_cache( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1498	void *p_cache,
markrad	0:cdf462088d13	1499	int (f_get_cache)(void , mbedtls_ssl_session *),
markrad	0:cdf462088d13	1500	int (f_set_cache)(void , const mbedtls_ssl_session *) );
markrad	0:cdf462088d13	1501	#endif /* MBEDTLS_SSL_SRV_C */
markrad	0:cdf462088d13	1502
markrad	0:cdf462088d13	1503	#if defined(MBEDTLS_SSL_CLI_C)
markrad	0:cdf462088d13	1504	/**
markrad	0:cdf462088d13	1505	* \brief Request resumption of session (client-side only)
markrad	0:cdf462088d13	1506	* Session data is copied from presented session structure.
markrad	0:cdf462088d13	1507	*
markrad	0:cdf462088d13	1508	* \param ssl SSL context
markrad	0:cdf462088d13	1509	* \param session session context
markrad	0:cdf462088d13	1510	*
markrad	0:cdf462088d13	1511	* \return 0 if successful,
markrad	0:cdf462088d13	1512	* MBEDTLS_ERR_SSL_ALLOC_FAILED if memory allocation failed,
markrad	0:cdf462088d13	1513	* MBEDTLS_ERR_SSL_BAD_INPUT_DATA if used server-side or
markrad	0:cdf462088d13	1514	* arguments are otherwise invalid
markrad	0:cdf462088d13	1515	*
markrad	0:cdf462088d13	1516	* \sa mbedtls_ssl_get_session()
markrad	0:cdf462088d13	1517	*/
markrad	0:cdf462088d13	1518	int mbedtls_ssl_set_session( mbedtls_ssl_context ssl, const mbedtls_ssl_session session );
markrad	0:cdf462088d13	1519	#endif /* MBEDTLS_SSL_CLI_C */
markrad	0:cdf462088d13	1520
markrad	0:cdf462088d13	1521	/**
markrad	0:cdf462088d13	1522	* \brief Set the list of allowed ciphersuites and the preference
markrad	0:cdf462088d13	1523	* order. First in the list has the highest preference.
markrad	0:cdf462088d13	1524	* (Overrides all version-specific lists)
markrad	0:cdf462088d13	1525	*
markrad	0:cdf462088d13	1526	* The ciphersuites array is not copied, and must remain
markrad	0:cdf462088d13	1527	* valid for the lifetime of the ssl_config.
markrad	0:cdf462088d13	1528	*
markrad	0:cdf462088d13	1529	* Note: The server uses its own preferences
markrad	0:cdf462088d13	1530	* over the preference of the client unless
markrad	0:cdf462088d13	1531	* MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE is defined!
markrad	0:cdf462088d13	1532	*
markrad	0:cdf462088d13	1533	* \param conf SSL configuration
markrad	0:cdf462088d13	1534	* \param ciphersuites 0-terminated list of allowed ciphersuites
markrad	0:cdf462088d13	1535	*/
markrad	0:cdf462088d13	1536	void mbedtls_ssl_conf_ciphersuites( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1537	const int *ciphersuites );
markrad	0:cdf462088d13	1538
markrad	0:cdf462088d13	1539	/**
markrad	0:cdf462088d13	1540	* \brief Set the list of allowed ciphersuites and the
markrad	0:cdf462088d13	1541	* preference order for a specific version of the protocol.
markrad	0:cdf462088d13	1542	* (Only useful on the server side)
markrad	0:cdf462088d13	1543	*
markrad	0:cdf462088d13	1544	* The ciphersuites array is not copied, and must remain
markrad	0:cdf462088d13	1545	* valid for the lifetime of the ssl_config.
markrad	0:cdf462088d13	1546	*
markrad	0:cdf462088d13	1547	* \param conf SSL configuration
markrad	0:cdf462088d13	1548	* \param ciphersuites 0-terminated list of allowed ciphersuites
markrad	0:cdf462088d13	1549	* \param major Major version number (only MBEDTLS_SSL_MAJOR_VERSION_3
markrad	0:cdf462088d13	1550	* supported)
markrad	0:cdf462088d13	1551	* \param minor Minor version number (MBEDTLS_SSL_MINOR_VERSION_0,
markrad	0:cdf462088d13	1552	* MBEDTLS_SSL_MINOR_VERSION_1 and MBEDTLS_SSL_MINOR_VERSION_2,
markrad	0:cdf462088d13	1553	* MBEDTLS_SSL_MINOR_VERSION_3 supported)
markrad	0:cdf462088d13	1554	*
markrad	0:cdf462088d13	1555	* \note With DTLS, use MBEDTLS_SSL_MINOR_VERSION_2 for DTLS 1.0
markrad	0:cdf462088d13	1556	* and MBEDTLS_SSL_MINOR_VERSION_3 for DTLS 1.2
markrad	0:cdf462088d13	1557	*/
markrad	0:cdf462088d13	1558	void mbedtls_ssl_conf_ciphersuites_for_version( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1559	const int *ciphersuites,
markrad	0:cdf462088d13	1560	int major, int minor );
markrad	0:cdf462088d13	1561
markrad	0:cdf462088d13	1562	#if defined(MBEDTLS_X509_CRT_PARSE_C)
markrad	0:cdf462088d13	1563	/**
markrad	0:cdf462088d13	1564	* \brief Set the X.509 security profile used for verification
markrad	0:cdf462088d13	1565	*
markrad	0:cdf462088d13	1566	* \note The restrictions are enforced for all certificates in the
markrad	0:cdf462088d13	1567	* chain. However, signatures in the handshake are not covered
markrad	0:cdf462088d13	1568	* by this setting but by \b mbedtls_ssl_conf_sig_hashes().
markrad	0:cdf462088d13	1569	*
markrad	0:cdf462088d13	1570	* \param conf SSL configuration
markrad	0:cdf462088d13	1571	* \param profile Profile to use
markrad	0:cdf462088d13	1572	*/
markrad	0:cdf462088d13	1573	void mbedtls_ssl_conf_cert_profile( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1574	const mbedtls_x509_crt_profile *profile );
markrad	0:cdf462088d13	1575
markrad	0:cdf462088d13	1576	/**
markrad	0:cdf462088d13	1577	* \brief Set the data required to verify peer certificate
markrad	0:cdf462088d13	1578	*
markrad	0:cdf462088d13	1579	* \param conf SSL configuration
markrad	0:cdf462088d13	1580	* \param ca_chain trusted CA chain (meaning all fully trusted top-level CAs)
markrad	0:cdf462088d13	1581	* \param ca_crl trusted CA CRLs
markrad	0:cdf462088d13	1582	*/
markrad	0:cdf462088d13	1583	void mbedtls_ssl_conf_ca_chain( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1584	mbedtls_x509_crt *ca_chain,
markrad	0:cdf462088d13	1585	mbedtls_x509_crl *ca_crl );
markrad	0:cdf462088d13	1586
markrad	0:cdf462088d13	1587	/**
markrad	0:cdf462088d13	1588	* \brief Set own certificate chain and private key
markrad	0:cdf462088d13	1589	*
markrad	0:cdf462088d13	1590	* \note own_cert should contain in order from the bottom up your
markrad	0:cdf462088d13	1591	* certificate chain. The top certificate (self-signed)
markrad	0:cdf462088d13	1592	* can be omitted.
markrad	0:cdf462088d13	1593	*
markrad	0:cdf462088d13	1594	* \note On server, this function can be called multiple times to
markrad	0:cdf462088d13	1595	* provision more than one cert/key pair (eg one ECDSA, one
markrad	0:cdf462088d13	1596	* RSA with SHA-256, one RSA with SHA-1). An adequate
markrad	0:cdf462088d13	1597	* certificate will be selected according to the client's
markrad	0:cdf462088d13	1598	* advertised capabilities. In case mutliple certificates are
markrad	0:cdf462088d13	1599	* adequate, preference is given to the one set by the first
markrad	0:cdf462088d13	1600	* call to this function, then second, etc.
markrad	0:cdf462088d13	1601	*
markrad	0:cdf462088d13	1602	* \note On client, only the first call has any effect. That is,
markrad	0:cdf462088d13	1603	* only one client certificate can be provisioned. The
markrad	0:cdf462088d13	1604	* server's preferences in its CertficateRequest message will
markrad	0:cdf462088d13	1605	* be ignored and our only cert will be sent regardless of
markrad	0:cdf462088d13	1606	* whether it matches those preferences - the server can then
markrad	0:cdf462088d13	1607	* decide what it wants to do with it.
markrad	0:cdf462088d13	1608	*
markrad	0:cdf462088d13	1609	* \param conf SSL configuration
markrad	0:cdf462088d13	1610	* \param own_cert own public certificate chain
markrad	0:cdf462088d13	1611	* \param pk_key own private key
markrad	0:cdf462088d13	1612	*
markrad	0:cdf462088d13	1613	* \return 0 on success or MBEDTLS_ERR_SSL_ALLOC_FAILED
markrad	0:cdf462088d13	1614	*/
markrad	0:cdf462088d13	1615	int mbedtls_ssl_conf_own_cert( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1616	mbedtls_x509_crt *own_cert,
markrad	0:cdf462088d13	1617	mbedtls_pk_context *pk_key );
markrad	0:cdf462088d13	1618	#endif /* MBEDTLS_X509_CRT_PARSE_C */
markrad	0:cdf462088d13	1619
markrad	0:cdf462088d13	1620	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
markrad	0:cdf462088d13	1621	/**
markrad	0:cdf462088d13	1622	* \brief Set the Pre Shared Key (PSK) and the expected identity name
markrad	0:cdf462088d13	1623	*
markrad	0:cdf462088d13	1624	* \note This is mainly useful for clients. Servers will usually
markrad	0:cdf462088d13	1625	* want to use \c mbedtls_ssl_conf_psk_cb() instead.
markrad	0:cdf462088d13	1626	*
markrad	0:cdf462088d13	1627	* \note Currently clients can only register one pre-shared key.
markrad	0:cdf462088d13	1628	* In other words, the servers' identity hint is ignored.
markrad	0:cdf462088d13	1629	* Support for setting multiple PSKs on clients and selecting
markrad	0:cdf462088d13	1630	* one based on the identity hint is not a planned feature but
markrad	0:cdf462088d13	1631	* feedback is welcomed.
markrad	0:cdf462088d13	1632	*
markrad	0:cdf462088d13	1633	* \param conf SSL configuration
markrad	0:cdf462088d13	1634	* \param psk pointer to the pre-shared key
markrad	0:cdf462088d13	1635	* \param psk_len pre-shared key length
markrad	0:cdf462088d13	1636	* \param psk_identity pointer to the pre-shared key identity
markrad	0:cdf462088d13	1637	* \param psk_identity_len identity key length
markrad	0:cdf462088d13	1638	*
markrad	0:cdf462088d13	1639	* \return 0 if successful or MBEDTLS_ERR_SSL_ALLOC_FAILED
markrad	0:cdf462088d13	1640	*/
markrad	0:cdf462088d13	1641	int mbedtls_ssl_conf_psk( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1642	const unsigned char *psk, size_t psk_len,
markrad	0:cdf462088d13	1643	const unsigned char *psk_identity, size_t psk_identity_len );
markrad	0:cdf462088d13	1644
markrad	0:cdf462088d13	1645
markrad	0:cdf462088d13	1646	/**
markrad	0:cdf462088d13	1647	* \brief Set the Pre Shared Key (PSK) for the current handshake
markrad	0:cdf462088d13	1648	*
markrad	0:cdf462088d13	1649	* \note This should only be called inside the PSK callback,
markrad	0:cdf462088d13	1650	* ie the function passed to \c mbedtls_ssl_conf_psk_cb().
markrad	0:cdf462088d13	1651	*
markrad	0:cdf462088d13	1652	* \param ssl SSL context
markrad	0:cdf462088d13	1653	* \param psk pointer to the pre-shared key
markrad	0:cdf462088d13	1654	* \param psk_len pre-shared key length
markrad	0:cdf462088d13	1655	*
markrad	0:cdf462088d13	1656	* \return 0 if successful or MBEDTLS_ERR_SSL_ALLOC_FAILED
markrad	0:cdf462088d13	1657	*/
markrad	0:cdf462088d13	1658	int mbedtls_ssl_set_hs_psk( mbedtls_ssl_context *ssl,
markrad	0:cdf462088d13	1659	const unsigned char *psk, size_t psk_len );
markrad	0:cdf462088d13	1660
markrad	0:cdf462088d13	1661	/**
markrad	0:cdf462088d13	1662	* \brief Set the PSK callback (server-side only).
markrad	0:cdf462088d13	1663	*
markrad	0:cdf462088d13	1664	* If set, the PSK callback is called for each
markrad	0:cdf462088d13	1665	* handshake where a PSK ciphersuite was negotiated.
markrad	0:cdf462088d13	1666	* The caller provides the identity received and wants to
markrad	0:cdf462088d13	1667	* receive the actual PSK data and length.
markrad	0:cdf462088d13	1668	*
markrad	0:cdf462088d13	1669	* The callback has the following parameters: (void *parameter,
markrad	0:cdf462088d13	1670	* mbedtls_ssl_context ssl, const unsigned char psk_identity,
markrad	0:cdf462088d13	1671	* size_t identity_len)
markrad	0:cdf462088d13	1672	* If a valid PSK identity is found, the callback should use
markrad	0:cdf462088d13	1673	* \c mbedtls_ssl_set_hs_psk() on the ssl context to set the
markrad	0:cdf462088d13	1674	* correct PSK and return 0.
markrad	0:cdf462088d13	1675	* Any other return value will result in a denied PSK identity.
markrad	0:cdf462088d13	1676	*
markrad	0:cdf462088d13	1677	* \note If you set a PSK callback using this function, then you
markrad	0:cdf462088d13	1678	* don't need to set a PSK key and identity using
markrad	0:cdf462088d13	1679	* \c mbedtls_ssl_conf_psk().
markrad	0:cdf462088d13	1680	*
markrad	0:cdf462088d13	1681	* \param conf SSL configuration
markrad	0:cdf462088d13	1682	* \param f_psk PSK identity function
markrad	0:cdf462088d13	1683	* \param p_psk PSK identity parameter
markrad	0:cdf462088d13	1684	*/
markrad	0:cdf462088d13	1685	void mbedtls_ssl_conf_psk_cb( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1686	int (f_psk)(void , mbedtls_ssl_context , const unsigned char ,
markrad	0:cdf462088d13	1687	size_t),
markrad	0:cdf462088d13	1688	void *p_psk );
markrad	0:cdf462088d13	1689	#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
markrad	0:cdf462088d13	1690
markrad	0:cdf462088d13	1691	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C)
markrad	0:cdf462088d13	1692	/**
markrad	0:cdf462088d13	1693	* \brief Set the Diffie-Hellman public P and G values,
markrad	0:cdf462088d13	1694	* read as hexadecimal strings (server-side only)
markrad	0:cdf462088d13	1695	* (Default: MBEDTLS_DHM_RFC5114_MODP_2048_[PG])
markrad	0:cdf462088d13	1696	*
markrad	0:cdf462088d13	1697	* \param conf SSL configuration
markrad	0:cdf462088d13	1698	* \param dhm_P Diffie-Hellman-Merkle modulus
markrad	0:cdf462088d13	1699	* \param dhm_G Diffie-Hellman-Merkle generator
markrad	0:cdf462088d13	1700	*
markrad	0:cdf462088d13	1701	* \return 0 if successful
markrad	0:cdf462088d13	1702	*/
markrad	0:cdf462088d13	1703	int mbedtls_ssl_conf_dh_param( mbedtls_ssl_config conf, const char dhm_P, const char *dhm_G );
markrad	0:cdf462088d13	1704
markrad	0:cdf462088d13	1705	/**
markrad	0:cdf462088d13	1706	* \brief Set the Diffie-Hellman public P and G values,
markrad	0:cdf462088d13	1707	* read from existing context (server-side only)
markrad	0:cdf462088d13	1708	*
markrad	0:cdf462088d13	1709	* \param conf SSL configuration
markrad	0:cdf462088d13	1710	* \param dhm_ctx Diffie-Hellman-Merkle context
markrad	0:cdf462088d13	1711	*
markrad	0:cdf462088d13	1712	* \return 0 if successful
markrad	0:cdf462088d13	1713	*/
markrad	0:cdf462088d13	1714	int mbedtls_ssl_conf_dh_param_ctx( mbedtls_ssl_config conf, mbedtls_dhm_context dhm_ctx );
markrad	0:cdf462088d13	1715	#endif /* MBEDTLS_DHM_C && defined(MBEDTLS_SSL_SRV_C) */
markrad	0:cdf462088d13	1716
markrad	0:cdf462088d13	1717	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_CLI_C)
markrad	0:cdf462088d13	1718	/**
markrad	0:cdf462088d13	1719	* \brief Set the minimum length for Diffie-Hellman parameters.
markrad	0:cdf462088d13	1720	* (Client-side only.)
markrad	0:cdf462088d13	1721	* (Default: 1024 bits.)
markrad	0:cdf462088d13	1722	*
markrad	0:cdf462088d13	1723	* \param conf SSL configuration
markrad	0:cdf462088d13	1724	* \param bitlen Minimum bit length of the DHM prime
markrad	0:cdf462088d13	1725	*/
markrad	0:cdf462088d13	1726	void mbedtls_ssl_conf_dhm_min_bitlen( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1727	unsigned int bitlen );
markrad	0:cdf462088d13	1728	#endif /* MBEDTLS_DHM_C && MBEDTLS_SSL_CLI_C */
markrad	0:cdf462088d13	1729
markrad	0:cdf462088d13	1730	#if defined(MBEDTLS_ECP_C)
markrad	0:cdf462088d13	1731	/**
markrad	0:cdf462088d13	1732	* \brief Set the allowed curves in order of preference.
markrad	0:cdf462088d13	1733	* (Default: all defined curves.)
markrad	0:cdf462088d13	1734	*
markrad	0:cdf462088d13	1735	* On server: this only affects selection of the ECDHE curve;
markrad	0:cdf462088d13	1736	* the curves used for ECDH and ECDSA are determined by the
markrad	0:cdf462088d13	1737	* list of available certificates instead.
markrad	0:cdf462088d13	1738	*
markrad	0:cdf462088d13	1739	* On client: this affects the list of curves offered for any
markrad	0:cdf462088d13	1740	* use. The server can override our preference order.
markrad	0:cdf462088d13	1741	*
markrad	0:cdf462088d13	1742	* Both sides: limits the set of curves accepted for use in
markrad	0:cdf462088d13	1743	* ECDHE and in the peer's end-entity certificate.
markrad	0:cdf462088d13	1744	*
markrad	0:cdf462088d13	1745	* \note This has no influence on which curves are allowed inside the
markrad	0:cdf462088d13	1746	* certificate chains, see \c mbedtls_ssl_conf_cert_profile()
markrad	0:cdf462088d13	1747	* for that. For the end-entity certificate however, the key
markrad	0:cdf462088d13	1748	* will be accepted only if it is allowed both by this list
markrad	0:cdf462088d13	1749	* and by the cert profile.
markrad	0:cdf462088d13	1750	*
markrad	0:cdf462088d13	1751	* \note This list should be ordered by decreasing preference
markrad	0:cdf462088d13	1752	* (preferred curve first).
markrad	0:cdf462088d13	1753	*
markrad	0:cdf462088d13	1754	* \param conf SSL configuration
markrad	0:cdf462088d13	1755	* \param curves Ordered list of allowed curves,
markrad	0:cdf462088d13	1756	* terminated by MBEDTLS_ECP_DP_NONE.
markrad	0:cdf462088d13	1757	*/
markrad	0:cdf462088d13	1758	void mbedtls_ssl_conf_curves( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1759	const mbedtls_ecp_group_id *curves );
markrad	0:cdf462088d13	1760	#endif /* MBEDTLS_ECP_C */
markrad	0:cdf462088d13	1761
markrad	0:cdf462088d13	1762	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
markrad	0:cdf462088d13	1763	/**
markrad	0:cdf462088d13	1764	* \brief Set the allowed hashes for signatures during the handshake.
markrad	0:cdf462088d13	1765	* (Default: all available hashes except MD5.)
markrad	0:cdf462088d13	1766	*
markrad	0:cdf462088d13	1767	* \note This only affects which hashes are offered and can be used
markrad	0:cdf462088d13	1768	* for signatures during the handshake. Hashes for message
markrad	0:cdf462088d13	1769	* authentication and the TLS PRF are controlled by the
markrad	0:cdf462088d13	1770	* ciphersuite, see \c mbedtls_ssl_conf_ciphersuites(). Hashes
markrad	0:cdf462088d13	1771	* used for certificate signature are controlled by the
markrad	0:cdf462088d13	1772	* verification profile, see \c mbedtls_ssl_conf_cert_profile().
markrad	0:cdf462088d13	1773	*
markrad	0:cdf462088d13	1774	* \note This list should be ordered by decreasing preference
markrad	0:cdf462088d13	1775	* (preferred hash first).
markrad	0:cdf462088d13	1776	*
markrad	0:cdf462088d13	1777	* \param conf SSL configuration
markrad	0:cdf462088d13	1778	* \param hashes Ordered list of allowed signature hashes,
markrad	0:cdf462088d13	1779	* terminated by \c MBEDTLS_MD_NONE.
markrad	0:cdf462088d13	1780	*/
markrad	0:cdf462088d13	1781	void mbedtls_ssl_conf_sig_hashes( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1782	const int *hashes );
markrad	0:cdf462088d13	1783	#endif /* MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
markrad	0:cdf462088d13	1784
markrad	0:cdf462088d13	1785	#if defined(MBEDTLS_X509_CRT_PARSE_C)
markrad	0:cdf462088d13	1786	/**
markrad	0:cdf462088d13	1787	* \brief Set the hostname to check against the received server
markrad	0:cdf462088d13	1788	* certificate. It sets the ServerName TLS extension too,
markrad	0:cdf462088d13	1789	* if the extension is enabled.
markrad	0:cdf462088d13	1790	* (client-side only)
markrad	0:cdf462088d13	1791	*
markrad	0:cdf462088d13	1792	* \param ssl SSL context
markrad	0:cdf462088d13	1793	* \param hostname the server hostname
markrad	0:cdf462088d13	1794	*
markrad	0:cdf462088d13	1795	* \return 0 if successful or MBEDTLS_ERR_SSL_ALLOC_FAILED
markrad	0:cdf462088d13	1796	*/
markrad	0:cdf462088d13	1797	int mbedtls_ssl_set_hostname( mbedtls_ssl_context ssl, const char hostname );
markrad	0:cdf462088d13	1798	#endif /* MBEDTLS_X509_CRT_PARSE_C */
markrad	0:cdf462088d13	1799
markrad	0:cdf462088d13	1800	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
markrad	0:cdf462088d13	1801	/**
markrad	0:cdf462088d13	1802	* \brief Set own certificate and key for the current handshake
markrad	0:cdf462088d13	1803	*
markrad	0:cdf462088d13	1804	* \note Same as \c mbedtls_ssl_conf_own_cert() but for use within
markrad	0:cdf462088d13	1805	* the SNI callback.
markrad	0:cdf462088d13	1806	*
markrad	0:cdf462088d13	1807	* \param ssl SSL context
markrad	0:cdf462088d13	1808	* \param own_cert own public certificate chain
markrad	0:cdf462088d13	1809	* \param pk_key own private key
markrad	0:cdf462088d13	1810	*
markrad	0:cdf462088d13	1811	* \return 0 on success or MBEDTLS_ERR_SSL_ALLOC_FAILED
markrad	0:cdf462088d13	1812	*/
markrad	0:cdf462088d13	1813	int mbedtls_ssl_set_hs_own_cert( mbedtls_ssl_context *ssl,
markrad	0:cdf462088d13	1814	mbedtls_x509_crt *own_cert,
markrad	0:cdf462088d13	1815	mbedtls_pk_context *pk_key );
markrad	0:cdf462088d13	1816
markrad	0:cdf462088d13	1817	/**
markrad	0:cdf462088d13	1818	* \brief Set the data required to verify peer certificate for the
markrad	0:cdf462088d13	1819	* current handshake
markrad	0:cdf462088d13	1820	*
markrad	0:cdf462088d13	1821	* \note Same as \c mbedtls_ssl_conf_ca_chain() but for use within
markrad	0:cdf462088d13	1822	* the SNI callback.
markrad	0:cdf462088d13	1823	*
markrad	0:cdf462088d13	1824	* \param ssl SSL context
markrad	0:cdf462088d13	1825	* \param ca_chain trusted CA chain (meaning all fully trusted top-level CAs)
markrad	0:cdf462088d13	1826	* \param ca_crl trusted CA CRLs
markrad	0:cdf462088d13	1827	*/
markrad	0:cdf462088d13	1828	void mbedtls_ssl_set_hs_ca_chain( mbedtls_ssl_context *ssl,
markrad	0:cdf462088d13	1829	mbedtls_x509_crt *ca_chain,
markrad	0:cdf462088d13	1830	mbedtls_x509_crl *ca_crl );
markrad	0:cdf462088d13	1831
markrad	0:cdf462088d13	1832	/**
markrad	0:cdf462088d13	1833	* \brief Set authmode for the current handshake.
markrad	0:cdf462088d13	1834	*
markrad	0:cdf462088d13	1835	* \note Same as \c mbedtls_ssl_conf_authmode() but for use within
markrad	0:cdf462088d13	1836	* the SNI callback.
markrad	0:cdf462088d13	1837	*
markrad	0:cdf462088d13	1838	* \param ssl SSL context
markrad	0:cdf462088d13	1839	* \param authmode MBEDTLS_SSL_VERIFY_NONE, MBEDTLS_SSL_VERIFY_OPTIONAL or
markrad	0:cdf462088d13	1840	* MBEDTLS_SSL_VERIFY_REQUIRED
markrad	0:cdf462088d13	1841	*/
markrad	0:cdf462088d13	1842	void mbedtls_ssl_set_hs_authmode( mbedtls_ssl_context *ssl,
markrad	0:cdf462088d13	1843	int authmode );
markrad	0:cdf462088d13	1844
markrad	0:cdf462088d13	1845	/**
markrad	0:cdf462088d13	1846	* \brief Set server side ServerName TLS extension callback
markrad	0:cdf462088d13	1847	* (optional, server-side only).
markrad	0:cdf462088d13	1848	*
markrad	0:cdf462088d13	1849	* If set, the ServerName callback is called whenever the
markrad	0:cdf462088d13	1850	* server receives a ServerName TLS extension from the client
markrad	0:cdf462088d13	1851	* during a handshake. The ServerName callback has the
markrad	0:cdf462088d13	1852	* following parameters: (void parameter, mbedtls_ssl_context ssl,
markrad	0:cdf462088d13	1853	* const unsigned char *hostname, size_t len). If a suitable
markrad	0:cdf462088d13	1854	* certificate is found, the callback must set the
markrad	0:cdf462088d13	1855	* certificate(s) and key(s) to use with \c
markrad	0:cdf462088d13	1856	* mbedtls_ssl_set_hs_own_cert() (can be called repeatedly),
markrad	0:cdf462088d13	1857	* and may optionally adjust the CA and associated CRL with \c
markrad	0:cdf462088d13	1858	* mbedtls_ssl_set_hs_ca_chain() as well as the client
markrad	0:cdf462088d13	1859	* authentication mode with \c mbedtls_ssl_set_hs_authmode(),
markrad	0:cdf462088d13	1860	* then must return 0. If no matching name is found, the
markrad	0:cdf462088d13	1861	* callback must either set a default cert, or
markrad	0:cdf462088d13	1862	* return non-zero to abort the handshake at this point.
markrad	0:cdf462088d13	1863	*
markrad	0:cdf462088d13	1864	* \param conf SSL configuration
markrad	0:cdf462088d13	1865	* \param f_sni verification function
markrad	0:cdf462088d13	1866	* \param p_sni verification parameter
markrad	0:cdf462088d13	1867	*/
markrad	0:cdf462088d13	1868	void mbedtls_ssl_conf_sni( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	1869	int (f_sni)(void , mbedtls_ssl_context , const unsigned char ,
markrad	0:cdf462088d13	1870	size_t),
markrad	0:cdf462088d13	1871	void *p_sni );
markrad	0:cdf462088d13	1872	#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
markrad	0:cdf462088d13	1873
markrad	0:cdf462088d13	1874	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
markrad	0:cdf462088d13	1875	/**
markrad	0:cdf462088d13	1876	* \brief Set the EC J-PAKE password for current handshake.
markrad	0:cdf462088d13	1877	*
markrad	0:cdf462088d13	1878	* \note An internal copy is made, and destroyed as soon as the
markrad	0:cdf462088d13	1879	* handshake is completed, or when the SSL context is reset or
markrad	0:cdf462088d13	1880	* freed.
markrad	0:cdf462088d13	1881	*
markrad	0:cdf462088d13	1882	* \note The SSL context needs to be already set up. The right place
markrad	0:cdf462088d13	1883	* to call this function is between \c mbedtls_ssl_setup() or
markrad	0:cdf462088d13	1884	* \c mbedtls_ssl_reset() and \c mbedtls_ssl_handshake().
markrad	0:cdf462088d13	1885	*
markrad	0:cdf462088d13	1886	* \param ssl SSL context
markrad	0:cdf462088d13	1887	* \param pw EC J-PAKE password (pre-shared secret)
markrad	0:cdf462088d13	1888	* \param pw_len length of pw in bytes
markrad	0:cdf462088d13	1889	*
markrad	0:cdf462088d13	1890	* \return 0 on success, or a negative error code.
markrad	0:cdf462088d13	1891	*/
markrad	0:cdf462088d13	1892	int mbedtls_ssl_set_hs_ecjpake_password( mbedtls_ssl_context *ssl,
markrad	0:cdf462088d13	1893	const unsigned char *pw,
markrad	0:cdf462088d13	1894	size_t pw_len );
markrad	0:cdf462088d13	1895	#endif /MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED /
markrad	0:cdf462088d13	1896
markrad	0:cdf462088d13	1897	#if defined(MBEDTLS_SSL_ALPN)
markrad	0:cdf462088d13	1898	/**
markrad	0:cdf462088d13	1899	* \brief Set the supported Application Layer Protocols.
markrad	0:cdf462088d13	1900	*
markrad	0:cdf462088d13	1901	* \param conf SSL configuration
markrad	0:cdf462088d13	1902	* \param protos Pointer to a NULL-terminated list of supported protocols,
markrad	0:cdf462088d13	1903	* in decreasing preference order. The pointer to the list is
markrad	0:cdf462088d13	1904	* recorded by the library for later reference as required, so
markrad	0:cdf462088d13	1905	* the lifetime of the table must be atleast as long as the
markrad	0:cdf462088d13	1906	* lifetime of the SSL configuration structure.
markrad	0:cdf462088d13	1907	*
markrad	0:cdf462088d13	1908	* \return 0 on success, or MBEDTLS_ERR_SSL_BAD_INPUT_DATA.
markrad	0:cdf462088d13	1909	*/
markrad	0:cdf462088d13	1910	int mbedtls_ssl_conf_alpn_protocols( mbedtls_ssl_config conf, const char *protos );
markrad	0:cdf462088d13	1911
markrad	0:cdf462088d13	1912	/**
markrad	0:cdf462088d13	1913	* \brief Get the name of the negotiated Application Layer Protocol.
markrad	0:cdf462088d13	1914	* This function should be called after the handshake is
markrad	0:cdf462088d13	1915	* completed.
markrad	0:cdf462088d13	1916	*
markrad	0:cdf462088d13	1917	* \param ssl SSL context
markrad	0:cdf462088d13	1918	*
markrad	0:cdf462088d13	1919	* \return Protcol name, or NULL if no protocol was negotiated.
markrad	0:cdf462088d13	1920	*/
markrad	0:cdf462088d13	1921	const char mbedtls_ssl_get_alpn_protocol( const mbedtls_ssl_context ssl );
markrad	0:cdf462088d13	1922	#endif /* MBEDTLS_SSL_ALPN */
markrad	0:cdf462088d13	1923
markrad	0:cdf462088d13	1924	/**
markrad	0:cdf462088d13	1925	* \brief Set the maximum supported version sent from the client side
markrad	0:cdf462088d13	1926	* and/or accepted at the server side
markrad	0:cdf462088d13	1927	* (Default: MBEDTLS_SSL_MAX_MAJOR_VERSION, MBEDTLS_SSL_MAX_MINOR_VERSION)
markrad	0:cdf462088d13	1928	*
markrad	0:cdf462088d13	1929	* \note This ignores ciphersuites from higher versions.
markrad	0:cdf462088d13	1930	*
markrad	0:cdf462088d13	1931	* \note With DTLS, use MBEDTLS_SSL_MINOR_VERSION_2 for DTLS 1.0 and
markrad	0:cdf462088d13	1932	* MBEDTLS_SSL_MINOR_VERSION_3 for DTLS 1.2
markrad	0:cdf462088d13	1933	*
markrad	0:cdf462088d13	1934	* \param conf SSL configuration
markrad	0:cdf462088d13	1935	* \param major Major version number (only MBEDTLS_SSL_MAJOR_VERSION_3 supported)
markrad	0:cdf462088d13	1936	* \param minor Minor version number (MBEDTLS_SSL_MINOR_VERSION_0,
markrad	0:cdf462088d13	1937	* MBEDTLS_SSL_MINOR_VERSION_1 and MBEDTLS_SSL_MINOR_VERSION_2,
markrad	0:cdf462088d13	1938	* MBEDTLS_SSL_MINOR_VERSION_3 supported)
markrad	0:cdf462088d13	1939	*/
markrad	0:cdf462088d13	1940	void mbedtls_ssl_conf_max_version( mbedtls_ssl_config *conf, int major, int minor );
markrad	0:cdf462088d13	1941
markrad	0:cdf462088d13	1942	/**
markrad	0:cdf462088d13	1943	* \brief Set the minimum accepted SSL/TLS protocol version
markrad	0:cdf462088d13	1944	* (Default: TLS 1.0)
markrad	0:cdf462088d13	1945	*
markrad	0:cdf462088d13	1946	* \note Input outside of the SSL_MAX_XXXXX_VERSION and
markrad	0:cdf462088d13	1947	* SSL_MIN_XXXXX_VERSION range is ignored.
markrad	0:cdf462088d13	1948	*
markrad	0:cdf462088d13	1949	* \note MBEDTLS_SSL_MINOR_VERSION_0 (SSL v3) should be avoided.
markrad	0:cdf462088d13	1950	*
markrad	0:cdf462088d13	1951	* \note With DTLS, use MBEDTLS_SSL_MINOR_VERSION_2 for DTLS 1.0 and
markrad	0:cdf462088d13	1952	* MBEDTLS_SSL_MINOR_VERSION_3 for DTLS 1.2
markrad	0:cdf462088d13	1953	*
markrad	0:cdf462088d13	1954	* \param conf SSL configuration
markrad	0:cdf462088d13	1955	* \param major Major version number (only MBEDTLS_SSL_MAJOR_VERSION_3 supported)
markrad	0:cdf462088d13	1956	* \param minor Minor version number (MBEDTLS_SSL_MINOR_VERSION_0,
markrad	0:cdf462088d13	1957	* MBEDTLS_SSL_MINOR_VERSION_1 and MBEDTLS_SSL_MINOR_VERSION_2,
markrad	0:cdf462088d13	1958	* MBEDTLS_SSL_MINOR_VERSION_3 supported)
markrad	0:cdf462088d13	1959	*/
markrad	0:cdf462088d13	1960	void mbedtls_ssl_conf_min_version( mbedtls_ssl_config *conf, int major, int minor );
markrad	0:cdf462088d13	1961
markrad	0:cdf462088d13	1962	#if defined(MBEDTLS_SSL_FALLBACK_SCSV) && defined(MBEDTLS_SSL_CLI_C)
markrad	0:cdf462088d13	1963	/**
markrad	0:cdf462088d13	1964	* \brief Set the fallback flag (client-side only).
markrad	0:cdf462088d13	1965	* (Default: MBEDTLS_SSL_IS_NOT_FALLBACK).
markrad	0:cdf462088d13	1966	*
markrad	0:cdf462088d13	1967	* \note Set to MBEDTLS_SSL_IS_FALLBACK when preparing a fallback
markrad	0:cdf462088d13	1968	* connection, that is a connection with max_version set to a
markrad	0:cdf462088d13	1969	* lower value than the value you're willing to use. Such
markrad	0:cdf462088d13	1970	* fallback connections are not recommended but are sometimes
markrad	0:cdf462088d13	1971	* necessary to interoperate with buggy (version-intolerant)
markrad	0:cdf462088d13	1972	* servers.
markrad	0:cdf462088d13	1973	*
markrad	0:cdf462088d13	1974	* \warning You should NOT set this to MBEDTLS_SSL_IS_FALLBACK for
markrad	0:cdf462088d13	1975	* non-fallback connections! This would appear to work for a
markrad	0:cdf462088d13	1976	* while, then cause failures when the server is upgraded to
markrad	0:cdf462088d13	1977	* support a newer TLS version.
markrad	0:cdf462088d13	1978	*
markrad	0:cdf462088d13	1979	* \param conf SSL configuration
markrad	0:cdf462088d13	1980	* \param fallback MBEDTLS_SSL_IS_NOT_FALLBACK or MBEDTLS_SSL_IS_FALLBACK
markrad	0:cdf462088d13	1981	*/
markrad	0:cdf462088d13	1982	void mbedtls_ssl_conf_fallback( mbedtls_ssl_config *conf, char fallback );
markrad	0:cdf462088d13	1983	#endif /* MBEDTLS_SSL_FALLBACK_SCSV && MBEDTLS_SSL_CLI_C */
markrad	0:cdf462088d13	1984
markrad	0:cdf462088d13	1985	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
markrad	0:cdf462088d13	1986	/**
markrad	0:cdf462088d13	1987	* \brief Enable or disable Encrypt-then-MAC
markrad	0:cdf462088d13	1988	* (Default: MBEDTLS_SSL_ETM_ENABLED)
markrad	0:cdf462088d13	1989	*
markrad	0:cdf462088d13	1990	* \note This should always be enabled, it is a security
markrad	0:cdf462088d13	1991	* improvement, and should not cause any interoperability
markrad	0:cdf462088d13	1992	* issue (used only if the peer supports it too).
markrad	0:cdf462088d13	1993	*
markrad	0:cdf462088d13	1994	* \param conf SSL configuration
markrad	0:cdf462088d13	1995	* \param etm MBEDTLS_SSL_ETM_ENABLED or MBEDTLS_SSL_ETM_DISABLED
markrad	0:cdf462088d13	1996	*/
markrad	0:cdf462088d13	1997	void mbedtls_ssl_conf_encrypt_then_mac( mbedtls_ssl_config *conf, char etm );
markrad	0:cdf462088d13	1998	#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
markrad	0:cdf462088d13	1999
markrad	0:cdf462088d13	2000	#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
markrad	0:cdf462088d13	2001	/**
markrad	0:cdf462088d13	2002	* \brief Enable or disable Extended Master Secret negotiation.
markrad	0:cdf462088d13	2003	* (Default: MBEDTLS_SSL_EXTENDED_MS_ENABLED)
markrad	0:cdf462088d13	2004	*
markrad	0:cdf462088d13	2005	* \note This should always be enabled, it is a security fix to the
markrad	0:cdf462088d13	2006	* protocol, and should not cause any interoperability issue
markrad	0:cdf462088d13	2007	* (used only if the peer supports it too).
markrad	0:cdf462088d13	2008	*
markrad	0:cdf462088d13	2009	* \param conf SSL configuration
markrad	0:cdf462088d13	2010	* \param ems MBEDTLS_SSL_EXTENDED_MS_ENABLED or MBEDTLS_SSL_EXTENDED_MS_DISABLED
markrad	0:cdf462088d13	2011	*/
markrad	0:cdf462088d13	2012	void mbedtls_ssl_conf_extended_master_secret( mbedtls_ssl_config *conf, char ems );
markrad	0:cdf462088d13	2013	#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
markrad	0:cdf462088d13	2014
markrad	0:cdf462088d13	2015	#if defined(MBEDTLS_ARC4_C)
markrad	0:cdf462088d13	2016	/**
markrad	0:cdf462088d13	2017	* \brief Disable or enable support for RC4
markrad	0:cdf462088d13	2018	* (Default: MBEDTLS_SSL_ARC4_DISABLED)
markrad	0:cdf462088d13	2019	*
markrad	0:cdf462088d13	2020	* \warning Use of RC4 in DTLS/TLS has been prohibited by RFC 7465
markrad	0:cdf462088d13	2021	* for security reasons. Use at your own risk.
markrad	0:cdf462088d13	2022	*
markrad	0:cdf462088d13	2023	* \note This function is deprecated and will likely be removed in
markrad	0:cdf462088d13	2024	* a future version of the library.
markrad	0:cdf462088d13	2025	* RC4 is disabled by default at compile time and needs to be
markrad	0:cdf462088d13	2026	* actively enabled for use with legacy systems.
markrad	0:cdf462088d13	2027	*
markrad	0:cdf462088d13	2028	* \param conf SSL configuration
markrad	0:cdf462088d13	2029	* \param arc4 MBEDTLS_SSL_ARC4_ENABLED or MBEDTLS_SSL_ARC4_DISABLED
markrad	0:cdf462088d13	2030	*/
markrad	0:cdf462088d13	2031	void mbedtls_ssl_conf_arc4_support( mbedtls_ssl_config *conf, char arc4 );
markrad	0:cdf462088d13	2032	#endif /* MBEDTLS_ARC4_C */
markrad	0:cdf462088d13	2033
markrad	0:cdf462088d13	2034	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
markrad	0:cdf462088d13	2035	/**
markrad	0:cdf462088d13	2036	* \brief Set the maximum fragment length to emit and/or negotiate
markrad	0:cdf462088d13	2037	* (Default: MBEDTLS_SSL_MAX_CONTENT_LEN, usually 2^14 bytes)
markrad	0:cdf462088d13	2038	* (Server: set maximum fragment length to emit,
markrad	0:cdf462088d13	2039	* usually negotiated by the client during handshake
markrad	0:cdf462088d13	2040	* (Client: set maximum fragment length to emit and
markrad	0:cdf462088d13	2041	* negotiate with the server during handshake)
markrad	0:cdf462088d13	2042	*
markrad	0:cdf462088d13	2043	* \param conf SSL configuration
markrad	0:cdf462088d13	2044	* \param mfl_code Code for maximum fragment length (allowed values:
markrad	0:cdf462088d13	2045	* MBEDTLS_SSL_MAX_FRAG_LEN_512, MBEDTLS_SSL_MAX_FRAG_LEN_1024,
markrad	0:cdf462088d13	2046	* MBEDTLS_SSL_MAX_FRAG_LEN_2048, MBEDTLS_SSL_MAX_FRAG_LEN_4096)
markrad	0:cdf462088d13	2047	*
markrad	0:cdf462088d13	2048	* \return 0 if successful or MBEDTLS_ERR_SSL_BAD_INPUT_DATA
markrad	0:cdf462088d13	2049	*/
markrad	0:cdf462088d13	2050	int mbedtls_ssl_conf_max_frag_len( mbedtls_ssl_config *conf, unsigned char mfl_code );
markrad	0:cdf462088d13	2051	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
markrad	0:cdf462088d13	2052
markrad	0:cdf462088d13	2053	#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
markrad	0:cdf462088d13	2054	/**
markrad	0:cdf462088d13	2055	* \brief Activate negotiation of truncated HMAC
markrad	0:cdf462088d13	2056	* (Default: MBEDTLS_SSL_TRUNC_HMAC_DISABLED)
markrad	0:cdf462088d13	2057	*
markrad	0:cdf462088d13	2058	* \param conf SSL configuration
markrad	0:cdf462088d13	2059	* \param truncate Enable or disable (MBEDTLS_SSL_TRUNC_HMAC_ENABLED or
markrad	0:cdf462088d13	2060	* MBEDTLS_SSL_TRUNC_HMAC_DISABLED)
markrad	0:cdf462088d13	2061	*/
markrad	0:cdf462088d13	2062	void mbedtls_ssl_conf_truncated_hmac( mbedtls_ssl_config *conf, int truncate );
markrad	0:cdf462088d13	2063	#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
markrad	0:cdf462088d13	2064
markrad	0:cdf462088d13	2065	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
markrad	0:cdf462088d13	2066	/**
markrad	0:cdf462088d13	2067	* \brief Enable / Disable 1/n-1 record splitting
markrad	0:cdf462088d13	2068	* (Default: MBEDTLS_SSL_CBC_RECORD_SPLITTING_ENABLED)
markrad	0:cdf462088d13	2069	*
markrad	0:cdf462088d13	2070	* \note Only affects SSLv3 and TLS 1.0, not higher versions.
markrad	0:cdf462088d13	2071	* Does not affect non-CBC ciphersuites in any version.
markrad	0:cdf462088d13	2072	*
markrad	0:cdf462088d13	2073	* \param conf SSL configuration
markrad	0:cdf462088d13	2074	* \param split MBEDTLS_SSL_CBC_RECORD_SPLITTING_ENABLED or
markrad	0:cdf462088d13	2075	* MBEDTLS_SSL_CBC_RECORD_SPLITTING_DISABLED
markrad	0:cdf462088d13	2076	*/
markrad	0:cdf462088d13	2077	void mbedtls_ssl_conf_cbc_record_splitting( mbedtls_ssl_config *conf, char split );
markrad	0:cdf462088d13	2078	#endif /* MBEDTLS_SSL_CBC_RECORD_SPLITTING */
markrad	0:cdf462088d13	2079
markrad	0:cdf462088d13	2080	#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
markrad	0:cdf462088d13	2081	/**
markrad	0:cdf462088d13	2082	* \brief Enable / Disable session tickets (client only).
markrad	0:cdf462088d13	2083	* (Default: MBEDTLS_SSL_SESSION_TICKETS_ENABLED.)
markrad	0:cdf462088d13	2084	*
markrad	0:cdf462088d13	2085	* \note On server, use \c mbedtls_ssl_conf_session_tickets_cb().
markrad	0:cdf462088d13	2086	*
markrad	0:cdf462088d13	2087	* \param conf SSL configuration
markrad	0:cdf462088d13	2088	* \param use_tickets Enable or disable (MBEDTLS_SSL_SESSION_TICKETS_ENABLED or
markrad	0:cdf462088d13	2089	* MBEDTLS_SSL_SESSION_TICKETS_DISABLED)
markrad	0:cdf462088d13	2090	*/
markrad	0:cdf462088d13	2091	void mbedtls_ssl_conf_session_tickets( mbedtls_ssl_config *conf, int use_tickets );
markrad	0:cdf462088d13	2092	#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */
markrad	0:cdf462088d13	2093
markrad	0:cdf462088d13	2094	#if defined(MBEDTLS_SSL_RENEGOTIATION)
markrad	0:cdf462088d13	2095	/**
markrad	0:cdf462088d13	2096	* \brief Enable / Disable renegotiation support for connection when
markrad	0:cdf462088d13	2097	* initiated by peer
markrad	0:cdf462088d13	2098	* (Default: MBEDTLS_SSL_RENEGOTIATION_DISABLED)
markrad	0:cdf462088d13	2099	*
markrad	0:cdf462088d13	2100	* \warning It is recommended to always disable renegotation unless you
markrad	0:cdf462088d13	2101	* know you need it and you know what you're doing. In the
markrad	0:cdf462088d13	2102	* past, there have been several issues associated with
markrad	0:cdf462088d13	2103	* renegotiation or a poor understanding of its properties.
markrad	0:cdf462088d13	2104	*
markrad	0:cdf462088d13	2105	* \note Server-side, enabling renegotiation also makes the server
markrad	0:cdf462088d13	2106	* susceptible to a resource DoS by a malicious client.
markrad	0:cdf462088d13	2107	*
markrad	0:cdf462088d13	2108	* \param conf SSL configuration
markrad	0:cdf462088d13	2109	* \param renegotiation Enable or disable (MBEDTLS_SSL_RENEGOTIATION_ENABLED or
markrad	0:cdf462088d13	2110	* MBEDTLS_SSL_RENEGOTIATION_DISABLED)
markrad	0:cdf462088d13	2111	*/
markrad	0:cdf462088d13	2112	void mbedtls_ssl_conf_renegotiation( mbedtls_ssl_config *conf, int renegotiation );
markrad	0:cdf462088d13	2113	#endif /* MBEDTLS_SSL_RENEGOTIATION */
markrad	0:cdf462088d13	2114
markrad	0:cdf462088d13	2115	/**
markrad	0:cdf462088d13	2116	* \brief Prevent or allow legacy renegotiation.
markrad	0:cdf462088d13	2117	* (Default: MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION)
markrad	0:cdf462088d13	2118	*
markrad	0:cdf462088d13	2119	* MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION allows connections to
markrad	0:cdf462088d13	2120	* be established even if the peer does not support
markrad	0:cdf462088d13	2121	* secure renegotiation, but does not allow renegotiation
markrad	0:cdf462088d13	2122	* to take place if not secure.
markrad	0:cdf462088d13	2123	* (Interoperable and secure option)
markrad	0:cdf462088d13	2124	*
markrad	0:cdf462088d13	2125	* MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION allows renegotiations
markrad	0:cdf462088d13	2126	* with non-upgraded peers. Allowing legacy renegotiation
markrad	0:cdf462088d13	2127	* makes the connection vulnerable to specific man in the
markrad	0:cdf462088d13	2128	* middle attacks. (See RFC 5746)
markrad	0:cdf462088d13	2129	* (Most interoperable and least secure option)
markrad	0:cdf462088d13	2130	*
markrad	0:cdf462088d13	2131	* MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE breaks off connections
markrad	0:cdf462088d13	2132	* if peer does not support secure renegotiation. Results
markrad	0:cdf462088d13	2133	* in interoperability issues with non-upgraded peers
markrad	0:cdf462088d13	2134	* that do not support renegotiation altogether.
markrad	0:cdf462088d13	2135	* (Most secure option, interoperability issues)
markrad	0:cdf462088d13	2136	*
markrad	0:cdf462088d13	2137	* \param conf SSL configuration
markrad	0:cdf462088d13	2138	* \param allow_legacy Prevent or allow (SSL_NO_LEGACY_RENEGOTIATION,
markrad	0:cdf462088d13	2139	* SSL_ALLOW_LEGACY_RENEGOTIATION or
markrad	0:cdf462088d13	2140	* MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE)
markrad	0:cdf462088d13	2141	*/
markrad	0:cdf462088d13	2142	void mbedtls_ssl_conf_legacy_renegotiation( mbedtls_ssl_config *conf, int allow_legacy );
markrad	0:cdf462088d13	2143
markrad	0:cdf462088d13	2144	#if defined(MBEDTLS_SSL_RENEGOTIATION)
markrad	0:cdf462088d13	2145	/**
markrad	0:cdf462088d13	2146	* \brief Enforce renegotiation requests.
markrad	0:cdf462088d13	2147	* (Default: enforced, max_records = 16)
markrad	0:cdf462088d13	2148	*
markrad	0:cdf462088d13	2149	* When we request a renegotiation, the peer can comply or
markrad	0:cdf462088d13	2150	* ignore the request. This function allows us to decide
markrad	0:cdf462088d13	2151	* whether to enforce our renegotiation requests by closing
markrad	0:cdf462088d13	2152	* the connection if the peer doesn't comply.
markrad	0:cdf462088d13	2153	*
markrad	0:cdf462088d13	2154	* However, records could already be in transit from the peer
markrad	0:cdf462088d13	2155	* when the request is emitted. In order to increase
markrad	0:cdf462088d13	2156	* reliability, we can accept a number of records before the
markrad	0:cdf462088d13	2157	* expected handshake records.
markrad	0:cdf462088d13	2158	*
markrad	0:cdf462088d13	2159	* The optimal value is highly dependent on the specific usage
markrad	0:cdf462088d13	2160	* scenario.
markrad	0:cdf462088d13	2161	*
markrad	0:cdf462088d13	2162	* \note With DTLS and server-initiated renegotiation, the
markrad	0:cdf462088d13	2163	* HelloRequest is retransmited every time mbedtls_ssl_read() times
markrad	0:cdf462088d13	2164	* out or receives Application Data, until:
markrad	0:cdf462088d13	2165	* - max_records records have beens seen, if it is >= 0, or
markrad	0:cdf462088d13	2166	* - the number of retransmits that would happen during an
markrad	0:cdf462088d13	2167	* actual handshake has been reached.
markrad	0:cdf462088d13	2168	* Please remember the request might be lost a few times
markrad	0:cdf462088d13	2169	* if you consider setting max_records to a really low value.
markrad	0:cdf462088d13	2170	*
markrad	0:cdf462088d13	2171	* \warning On client, the grace period can only happen during
markrad	0:cdf462088d13	2172	* mbedtls_ssl_read(), as opposed to mbedtls_ssl_write() and mbedtls_ssl_renegotiate()
markrad	0:cdf462088d13	2173	* which always behave as if max_record was 0. The reason is,
markrad	0:cdf462088d13	2174	* if we receive application data from the server, we need a
markrad	0:cdf462088d13	2175	* place to write it, which only happens during mbedtls_ssl_read().
markrad	0:cdf462088d13	2176	*
markrad	0:cdf462088d13	2177	* \param conf SSL configuration
markrad	0:cdf462088d13	2178	* \param max_records Use MBEDTLS_SSL_RENEGOTIATION_NOT_ENFORCED if you don't want to
markrad	0:cdf462088d13	2179	* enforce renegotiation, or a non-negative value to enforce
markrad	0:cdf462088d13	2180	* it but allow for a grace period of max_records records.
markrad	0:cdf462088d13	2181	*/
markrad	0:cdf462088d13	2182	void mbedtls_ssl_conf_renegotiation_enforced( mbedtls_ssl_config *conf, int max_records );
markrad	0:cdf462088d13	2183
markrad	0:cdf462088d13	2184	/**
markrad	0:cdf462088d13	2185	* \brief Set record counter threshold for periodic renegotiation.
markrad	0:cdf462088d13	2186	* (Default: 2^64 - 256.)
markrad	0:cdf462088d13	2187	*
markrad	0:cdf462088d13	2188	* Renegotiation is automatically triggered when a record
markrad	0:cdf462088d13	2189	* counter (outgoing or ingoing) crosses the defined
markrad	0:cdf462088d13	2190	* threshold. The default value is meant to prevent the
markrad	0:cdf462088d13	2191	* connection from being closed when the counter is about to
markrad	0:cdf462088d13	2192	* reached its maximal value (it is not allowed to wrap).
markrad	0:cdf462088d13	2193	*
markrad	0:cdf462088d13	2194	* Lower values can be used to enforce policies such as "keys
markrad	0:cdf462088d13	2195	* must be refreshed every N packets with cipher X".
markrad	0:cdf462088d13	2196	*
markrad	0:cdf462088d13	2197	* \param conf SSL configuration
markrad	0:cdf462088d13	2198	* \param period The threshold value: a big-endian 64-bit number.
markrad	0:cdf462088d13	2199	* Set to 2^64 - 1 to disable periodic renegotiation
markrad	0:cdf462088d13	2200	*/
markrad	0:cdf462088d13	2201	void mbedtls_ssl_conf_renegotiation_period( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	2202	const unsigned char period[8] );
markrad	0:cdf462088d13	2203	#endif /* MBEDTLS_SSL_RENEGOTIATION */
markrad	0:cdf462088d13	2204
markrad	0:cdf462088d13	2205	/**
markrad	0:cdf462088d13	2206	* \brief Return the number of data bytes available to read
markrad	0:cdf462088d13	2207	*
markrad	0:cdf462088d13	2208	* \param ssl SSL context
markrad	0:cdf462088d13	2209	*
markrad	0:cdf462088d13	2210	* \return how many bytes are available in the read buffer
markrad	0:cdf462088d13	2211	*/
markrad	0:cdf462088d13	2212	size_t mbedtls_ssl_get_bytes_avail( const mbedtls_ssl_context *ssl );
markrad	0:cdf462088d13	2213
markrad	0:cdf462088d13	2214	/**
markrad	0:cdf462088d13	2215	* \brief Return the result of the certificate verification
markrad	0:cdf462088d13	2216	*
markrad	0:cdf462088d13	2217	* \param ssl SSL context
markrad	0:cdf462088d13	2218	*
markrad	0:cdf462088d13	2219	* \return 0 if successful,
markrad	0:cdf462088d13	2220	* -1 if result is not available (eg because the handshake was
markrad	0:cdf462088d13	2221	* aborted too early), or
markrad	0:cdf462088d13	2222	* a combination of BADCERT_xxx and BADCRL_xxx flags, see
markrad	0:cdf462088d13	2223	* x509.h
markrad	0:cdf462088d13	2224	*/
markrad	0:cdf462088d13	2225	uint32_t mbedtls_ssl_get_verify_result( const mbedtls_ssl_context *ssl );
markrad	0:cdf462088d13	2226
markrad	0:cdf462088d13	2227	/**
markrad	0:cdf462088d13	2228	* \brief Return the name of the current ciphersuite
markrad	0:cdf462088d13	2229	*
markrad	0:cdf462088d13	2230	* \param ssl SSL context
markrad	0:cdf462088d13	2231	*
markrad	0:cdf462088d13	2232	* \return a string containing the ciphersuite name
markrad	0:cdf462088d13	2233	*/
markrad	0:cdf462088d13	2234	const char mbedtls_ssl_get_ciphersuite( const mbedtls_ssl_context ssl );
markrad	0:cdf462088d13	2235
markrad	0:cdf462088d13	2236	/**
markrad	0:cdf462088d13	2237	* \brief Return the current SSL version (SSLv3/TLSv1/etc)
markrad	0:cdf462088d13	2238	*
markrad	0:cdf462088d13	2239	* \param ssl SSL context
markrad	0:cdf462088d13	2240	*
markrad	0:cdf462088d13	2241	* \return a string containing the SSL version
markrad	0:cdf462088d13	2242	*/
markrad	0:cdf462088d13	2243	const char mbedtls_ssl_get_version( const mbedtls_ssl_context ssl );
markrad	0:cdf462088d13	2244
markrad	0:cdf462088d13	2245	/**
markrad	0:cdf462088d13	2246	* \brief Return the (maximum) number of bytes added by the record
markrad	0:cdf462088d13	2247	* layer: header + encryption/MAC overhead (inc. padding)
markrad	0:cdf462088d13	2248	*
markrad	0:cdf462088d13	2249	* \param ssl SSL context
markrad	0:cdf462088d13	2250	*
markrad	0:cdf462088d13	2251	* \return Current maximum record expansion in bytes, or
markrad	0:cdf462088d13	2252	* MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE if compression is
markrad	0:cdf462088d13	2253	* enabled, which makes expansion much less predictable
markrad	0:cdf462088d13	2254	*/
markrad	0:cdf462088d13	2255	int mbedtls_ssl_get_record_expansion( const mbedtls_ssl_context *ssl );
markrad	0:cdf462088d13	2256
markrad	0:cdf462088d13	2257	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
markrad	0:cdf462088d13	2258	/**
markrad	0:cdf462088d13	2259	* \brief Return the maximum fragment length (payload, in bytes).
markrad	0:cdf462088d13	2260	* This is the value negotiated with peer if any,
markrad	0:cdf462088d13	2261	* or the locally configured value.
markrad	0:cdf462088d13	2262	*
markrad	0:cdf462088d13	2263	* \note With DTLS, \c mbedtls_ssl_write() will return an error if
markrad	0:cdf462088d13	2264	* called with a larger length value.
markrad	0:cdf462088d13	2265	* With TLS, \c mbedtls_ssl_write() will fragment the input if
markrad	0:cdf462088d13	2266	* necessary and return the number of bytes written; it is up
markrad	0:cdf462088d13	2267	* to the caller to call \c mbedtls_ssl_write() again in
markrad	0:cdf462088d13	2268	* order to send the remaining bytes if any.
markrad	0:cdf462088d13	2269	*
markrad	0:cdf462088d13	2270	* \param ssl SSL context
markrad	0:cdf462088d13	2271	*
markrad	0:cdf462088d13	2272	* \return Current maximum fragment length.
markrad	0:cdf462088d13	2273	*/
markrad	0:cdf462088d13	2274	size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl );
markrad	0:cdf462088d13	2275	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
markrad	0:cdf462088d13	2276
markrad	0:cdf462088d13	2277	#if defined(MBEDTLS_X509_CRT_PARSE_C)
markrad	0:cdf462088d13	2278	/**
markrad	0:cdf462088d13	2279	* \brief Return the peer certificate from the current connection
markrad	0:cdf462088d13	2280	*
markrad	0:cdf462088d13	2281	* Note: Can be NULL in case no certificate was sent during
markrad	0:cdf462088d13	2282	* the handshake. Different calls for the same connection can
markrad	0:cdf462088d13	2283	* return the same or different pointers for the same
markrad	0:cdf462088d13	2284	* certificate and even a different certificate altogether.
markrad	0:cdf462088d13	2285	* The peer cert CAN change in a single connection if
markrad	0:cdf462088d13	2286	* renegotiation is performed.
markrad	0:cdf462088d13	2287	*
markrad	0:cdf462088d13	2288	* \param ssl SSL context
markrad	0:cdf462088d13	2289	*
markrad	0:cdf462088d13	2290	* \return the current peer certificate
markrad	0:cdf462088d13	2291	*/
markrad	0:cdf462088d13	2292	const mbedtls_x509_crt mbedtls_ssl_get_peer_cert( const mbedtls_ssl_context ssl );
markrad	0:cdf462088d13	2293	#endif /* MBEDTLS_X509_CRT_PARSE_C */
markrad	0:cdf462088d13	2294
markrad	0:cdf462088d13	2295	#if defined(MBEDTLS_SSL_CLI_C)
markrad	0:cdf462088d13	2296	/**
markrad	0:cdf462088d13	2297	* \brief Save session in order to resume it later (client-side only)
markrad	0:cdf462088d13	2298	* Session data is copied to presented session structure.
markrad	0:cdf462088d13	2299	*
markrad	0:cdf462088d13	2300	* \warning Currently, peer certificate is lost in the operation.
markrad	0:cdf462088d13	2301	*
markrad	0:cdf462088d13	2302	* \param ssl SSL context
markrad	0:cdf462088d13	2303	* \param session session context
markrad	0:cdf462088d13	2304	*
markrad	0:cdf462088d13	2305	* \return 0 if successful,
markrad	0:cdf462088d13	2306	* MBEDTLS_ERR_SSL_ALLOC_FAILED if memory allocation failed,
markrad	0:cdf462088d13	2307	* MBEDTLS_ERR_SSL_BAD_INPUT_DATA if used server-side or
markrad	0:cdf462088d13	2308	* arguments are otherwise invalid
markrad	0:cdf462088d13	2309	*
markrad	0:cdf462088d13	2310	* \sa mbedtls_ssl_set_session()
markrad	0:cdf462088d13	2311	*/
markrad	0:cdf462088d13	2312	int mbedtls_ssl_get_session( const mbedtls_ssl_context ssl, mbedtls_ssl_session session );
markrad	0:cdf462088d13	2313	#endif /* MBEDTLS_SSL_CLI_C */
markrad	0:cdf462088d13	2314
markrad	0:cdf462088d13	2315	/**
markrad	0:cdf462088d13	2316	* \brief Perform the SSL handshake
markrad	0:cdf462088d13	2317	*
markrad	0:cdf462088d13	2318	* \param ssl SSL context
markrad	0:cdf462088d13	2319	*
markrad	0:cdf462088d13	2320	* \return 0 if successful, or
markrad	0:cdf462088d13	2321	* MBEDTLS_ERR_SSL_WANT_READ or MBEDTLS_ERR_SSL_WANT_WRITE, or
markrad	0:cdf462088d13	2322	* MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED (see below), or
markrad	0:cdf462088d13	2323	* a specific SSL error code.
markrad	0:cdf462088d13	2324	*
markrad	0:cdf462088d13	2325	* \note If this function returns something other than 0 or
markrad	0:cdf462088d13	2326	* MBEDTLS_ERR_SSL_WANT_READ/WRITE, then the ssl context
markrad	0:cdf462088d13	2327	* becomes unusable, and you should either free it or call
markrad	0:cdf462088d13	2328	* \c mbedtls_ssl_session_reset() on it before re-using it for
markrad	0:cdf462088d13	2329	* a new connection; the current connection must be closed.
markrad	0:cdf462088d13	2330	*
markrad	0:cdf462088d13	2331	* \note If DTLS is in use, then you may choose to handle
markrad	0:cdf462088d13	2332	* MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED specially for logging
markrad	0:cdf462088d13	2333	* purposes, as it is an expected return value rather than an
markrad	0:cdf462088d13	2334	* actual error, but you still need to reset/free the context.
markrad	0:cdf462088d13	2335	*/
markrad	0:cdf462088d13	2336	int mbedtls_ssl_handshake( mbedtls_ssl_context *ssl );
markrad	0:cdf462088d13	2337
markrad	0:cdf462088d13	2338	/**
markrad	0:cdf462088d13	2339	* \brief Perform a single step of the SSL handshake
markrad	0:cdf462088d13	2340	*
markrad	0:cdf462088d13	2341	* \note The state of the context (ssl->state) will be at
markrad	0:cdf462088d13	2342	* the next state after execution of this function. Do not
markrad	0:cdf462088d13	2343	* call this function if state is MBEDTLS_SSL_HANDSHAKE_OVER.
markrad	0:cdf462088d13	2344	*
markrad	0:cdf462088d13	2345	* \note If this function returns something other than 0 or
markrad	0:cdf462088d13	2346	* MBEDTLS_ERR_SSL_WANT_READ/WRITE, then the ssl context
markrad	0:cdf462088d13	2347	* becomes unusable, and you should either free it or call
markrad	0:cdf462088d13	2348	* \c mbedtls_ssl_session_reset() on it before re-using it for
markrad	0:cdf462088d13	2349	* a new connection; the current connection must be closed.
markrad	0:cdf462088d13	2350	*
markrad	0:cdf462088d13	2351	* \param ssl SSL context
markrad	0:cdf462088d13	2352	*
markrad	0:cdf462088d13	2353	* \return 0 if successful, or
markrad	0:cdf462088d13	2354	* MBEDTLS_ERR_SSL_WANT_READ or MBEDTLS_ERR_SSL_WANT_WRITE, or
markrad	0:cdf462088d13	2355	* a specific SSL error code.
markrad	0:cdf462088d13	2356	*/
markrad	0:cdf462088d13	2357	int mbedtls_ssl_handshake_step( mbedtls_ssl_context *ssl );
markrad	0:cdf462088d13	2358
markrad	0:cdf462088d13	2359	#if defined(MBEDTLS_SSL_RENEGOTIATION)
markrad	0:cdf462088d13	2360	/**
markrad	0:cdf462088d13	2361	* \brief Initiate an SSL renegotiation on the running connection.
markrad	0:cdf462088d13	2362	* Client: perform the renegotiation right now.
markrad	0:cdf462088d13	2363	* Server: request renegotiation, which will be performed
markrad	0:cdf462088d13	2364	* during the next call to mbedtls_ssl_read() if honored by
markrad	0:cdf462088d13	2365	* client.
markrad	0:cdf462088d13	2366	*
markrad	0:cdf462088d13	2367	* \param ssl SSL context
markrad	0:cdf462088d13	2368	*
markrad	0:cdf462088d13	2369	* \return 0 if successful, or any mbedtls_ssl_handshake() return
markrad	0:cdf462088d13	2370	* value.
markrad	0:cdf462088d13	2371	*
markrad	0:cdf462088d13	2372	* \note If this function returns something other than 0 or
markrad	0:cdf462088d13	2373	* MBEDTLS_ERR_SSL_WANT_READ/WRITE, then the ssl context
markrad	0:cdf462088d13	2374	* becomes unusable, and you should either free it or call
markrad	0:cdf462088d13	2375	* \c mbedtls_ssl_session_reset() on it before re-using it for
markrad	0:cdf462088d13	2376	* a new connection; the current connection must be closed.
markrad	0:cdf462088d13	2377	*/
markrad	0:cdf462088d13	2378	int mbedtls_ssl_renegotiate( mbedtls_ssl_context *ssl );
markrad	0:cdf462088d13	2379	#endif /* MBEDTLS_SSL_RENEGOTIATION */
markrad	0:cdf462088d13	2380
markrad	0:cdf462088d13	2381	/**
markrad	0:cdf462088d13	2382	* \brief Read at most 'len' application data bytes
markrad	0:cdf462088d13	2383	*
markrad	0:cdf462088d13	2384	* \param ssl SSL context
markrad	0:cdf462088d13	2385	* \param buf buffer that will hold the data
markrad	0:cdf462088d13	2386	* \param len maximum number of bytes to read
markrad	0:cdf462088d13	2387	*
markrad	0:cdf462088d13	2388	* \return the number of bytes read, or
markrad	0:cdf462088d13	2389	* 0 for EOF, or
markrad	0:cdf462088d13	2390	* MBEDTLS_ERR_SSL_WANT_READ or MBEDTLS_ERR_SSL_WANT_WRITE, or
markrad	0:cdf462088d13	2391	* MBEDTLS_ERR_SSL_CLIENT_RECONNECT (see below), or
markrad	0:cdf462088d13	2392	* another negative error code.
markrad	0:cdf462088d13	2393	*
markrad	0:cdf462088d13	2394	* \note If this function returns something other than a positive
markrad	0:cdf462088d13	2395	* value or MBEDTLS_ERR_SSL_WANT_READ/WRITE or
markrad	0:cdf462088d13	2396	* MBEDTLS_ERR_SSL_CLIENT_RECONNECT, then the ssl context
markrad	0:cdf462088d13	2397	* becomes unusable, and you should either free it or call
markrad	0:cdf462088d13	2398	* \c mbedtls_ssl_session_reset() on it before re-using it for
markrad	0:cdf462088d13	2399	* a new connection; the current connection must be closed.
markrad	0:cdf462088d13	2400	*
markrad	0:cdf462088d13	2401	* \note When this function return MBEDTLS_ERR_SSL_CLIENT_RECONNECT
markrad	0:cdf462088d13	2402	* (which can only happen server-side), it means that a client
markrad	0:cdf462088d13	2403	* is initiating a new connection using the same source port.
markrad	0:cdf462088d13	2404	* You can either treat that as a connection close and wait
markrad	0:cdf462088d13	2405	* for the client to resend a ClientHello, or directly
markrad	0:cdf462088d13	2406	* continue with \c mbedtls_ssl_handshake() with the same
markrad	0:cdf462088d13	2407	* context (as it has beeen reset internally). Either way, you
markrad	0:cdf462088d13	2408	* should make sure this is seen by the application as a new
markrad	0:cdf462088d13	2409	* connection: application state, if any, should be reset, and
markrad	0:cdf462088d13	2410	* most importantly the identity of the client must be checked
markrad	0:cdf462088d13	2411	* again. WARNING: not validating the identity of the client
markrad	0:cdf462088d13	2412	* again, or not transmitting the new identity to the
markrad	0:cdf462088d13	2413	* application layer, would allow authentication bypass!
markrad	0:cdf462088d13	2414	*/
markrad	0:cdf462088d13	2415	int mbedtls_ssl_read( mbedtls_ssl_context ssl, unsigned char buf, size_t len );
markrad	0:cdf462088d13	2416
markrad	0:cdf462088d13	2417	/**
markrad	0:cdf462088d13	2418	* \brief Try to write exactly 'len' application data bytes
markrad	0:cdf462088d13	2419	*
markrad	0:cdf462088d13	2420	* \warning This function will do partial writes in some cases. If the
markrad	0:cdf462088d13	2421	* return value is non-negative but less than length, the
markrad	0:cdf462088d13	2422	* function must be called again with updated arguments:
markrad	0:cdf462088d13	2423	* buf + ret, len - ret (if ret is the return value) until
markrad	0:cdf462088d13	2424	* it returns a value equal to the last 'len' argument.
markrad	0:cdf462088d13	2425	*
markrad	0:cdf462088d13	2426	* \param ssl SSL context
markrad	0:cdf462088d13	2427	* \param buf buffer holding the data
markrad	0:cdf462088d13	2428	* \param len how many bytes must be written
markrad	0:cdf462088d13	2429	*
markrad	0:cdf462088d13	2430	* \return the number of bytes actually written (may be less than len),
markrad	0:cdf462088d13	2431	* or MBEDTLS_ERR_SSL_WANT_WRITE of MBEDTLS_ERR_SSL_WANT_READ,
markrad	0:cdf462088d13	2432	* or another negative error code.
markrad	0:cdf462088d13	2433	*
markrad	0:cdf462088d13	2434	* \note If this function returns something other than a positive
markrad	0:cdf462088d13	2435	* value or MBEDTLS_ERR_SSL_WANT_READ/WRITE, the ssl context
markrad	0:cdf462088d13	2436	* becomes unusable, and you should either free it or call
markrad	0:cdf462088d13	2437	* \c mbedtls_ssl_session_reset() on it before re-using it for
markrad	0:cdf462088d13	2438	* a new connection; the current connection must be closed.
markrad	0:cdf462088d13	2439	*
markrad	0:cdf462088d13	2440	* \note When this function returns MBEDTLS_ERR_SSL_WANT_WRITE/READ,
markrad	0:cdf462088d13	2441	* it must be called later with the same arguments,
markrad	0:cdf462088d13	2442	* until it returns a positive value.
markrad	0:cdf462088d13	2443	*
markrad	0:cdf462088d13	2444	* \note If the requested length is greater than the maximum
markrad	0:cdf462088d13	2445	* fragment length (either the built-in limit or the one set
markrad	0:cdf462088d13	2446	* or negotiated with the peer), then:
markrad	0:cdf462088d13	2447	* - with TLS, less bytes than requested are written.
markrad	0:cdf462088d13	2448	* - with DTLS, MBEDTLS_ERR_SSL_BAD_INPUT_DATA is returned.
markrad	0:cdf462088d13	2449	* \c mbedtls_ssl_get_max_frag_len() may be used to query the
markrad	0:cdf462088d13	2450	* active maximum fragment length.
markrad	0:cdf462088d13	2451	*/
markrad	0:cdf462088d13	2452	int mbedtls_ssl_write( mbedtls_ssl_context ssl, const unsigned char buf, size_t len );
markrad	0:cdf462088d13	2453
markrad	0:cdf462088d13	2454	/**
markrad	0:cdf462088d13	2455	* \brief Send an alert message
markrad	0:cdf462088d13	2456	*
markrad	0:cdf462088d13	2457	* \param ssl SSL context
markrad	0:cdf462088d13	2458	* \param level The alert level of the message
markrad	0:cdf462088d13	2459	* (MBEDTLS_SSL_ALERT_LEVEL_WARNING or MBEDTLS_SSL_ALERT_LEVEL_FATAL)
markrad	0:cdf462088d13	2460	* \param message The alert message (SSL_ALERT_MSG_*)
markrad	0:cdf462088d13	2461	*
markrad	0:cdf462088d13	2462	* \return 0 if successful, or a specific SSL error code.
markrad	0:cdf462088d13	2463	*
markrad	0:cdf462088d13	2464	* \note If this function returns something other than 0 or
markrad	0:cdf462088d13	2465	* MBEDTLS_ERR_SSL_WANT_READ/WRITE, then the ssl context
markrad	0:cdf462088d13	2466	* becomes unusable, and you should either free it or call
markrad	0:cdf462088d13	2467	* \c mbedtls_ssl_session_reset() on it before re-using it for
markrad	0:cdf462088d13	2468	* a new connection; the current connection must be closed.
markrad	0:cdf462088d13	2469	*/
markrad	0:cdf462088d13	2470	int mbedtls_ssl_send_alert_message( mbedtls_ssl_context *ssl,
markrad	0:cdf462088d13	2471	unsigned char level,
markrad	0:cdf462088d13	2472	unsigned char message );
markrad	0:cdf462088d13	2473	/**
markrad	0:cdf462088d13	2474	* \brief Notify the peer that the connection is being closed
markrad	0:cdf462088d13	2475	*
markrad	0:cdf462088d13	2476	* \param ssl SSL context
markrad	0:cdf462088d13	2477	*
markrad	0:cdf462088d13	2478	* \return 0 if successful, or a specific SSL error code.
markrad	0:cdf462088d13	2479	*
markrad	0:cdf462088d13	2480	* \note If this function returns something other than 0 or
markrad	0:cdf462088d13	2481	* MBEDTLS_ERR_SSL_WANT_READ/WRITE, then the ssl context
markrad	0:cdf462088d13	2482	* becomes unusable, and you should either free it or call
markrad	0:cdf462088d13	2483	* \c mbedtls_ssl_session_reset() on it before re-using it for
markrad	0:cdf462088d13	2484	* a new connection; the current connection must be closed.
markrad	0:cdf462088d13	2485	*/
markrad	0:cdf462088d13	2486	int mbedtls_ssl_close_notify( mbedtls_ssl_context *ssl );
markrad	0:cdf462088d13	2487
markrad	0:cdf462088d13	2488	/**
markrad	0:cdf462088d13	2489	* \brief Free referenced items in an SSL context and clear memory
markrad	0:cdf462088d13	2490	*
markrad	0:cdf462088d13	2491	* \param ssl SSL context
markrad	0:cdf462088d13	2492	*/
markrad	0:cdf462088d13	2493	void mbedtls_ssl_free( mbedtls_ssl_context *ssl );
markrad	0:cdf462088d13	2494
markrad	0:cdf462088d13	2495	/**
markrad	0:cdf462088d13	2496	* \brief Initialize an SSL configuration context
markrad	0:cdf462088d13	2497	* Just makes the context ready for
markrad	0:cdf462088d13	2498	* mbedtls_ssl_config_defaults() or mbedtls_ssl_config_free().
markrad	0:cdf462088d13	2499	*
markrad	0:cdf462088d13	2500	* \note You need to call mbedtls_ssl_config_defaults() unless you
markrad	0:cdf462088d13	2501	* manually set all of the relevent fields yourself.
markrad	0:cdf462088d13	2502	*
markrad	0:cdf462088d13	2503	* \param conf SSL configuration context
markrad	0:cdf462088d13	2504	*/
markrad	0:cdf462088d13	2505	void mbedtls_ssl_config_init( mbedtls_ssl_config *conf );
markrad	0:cdf462088d13	2506
markrad	0:cdf462088d13	2507	/**
markrad	0:cdf462088d13	2508	* \brief Load reasonnable default SSL configuration values.
markrad	0:cdf462088d13	2509	* (You need to call mbedtls_ssl_config_init() first.)
markrad	0:cdf462088d13	2510	*
markrad	0:cdf462088d13	2511	* \param conf SSL configuration context
markrad	0:cdf462088d13	2512	* \param endpoint MBEDTLS_SSL_IS_CLIENT or MBEDTLS_SSL_IS_SERVER
markrad	0:cdf462088d13	2513	* \param transport MBEDTLS_SSL_TRANSPORT_STREAM for TLS, or
markrad	0:cdf462088d13	2514	* MBEDTLS_SSL_TRANSPORT_DATAGRAM for DTLS
markrad	0:cdf462088d13	2515	* \param preset a MBEDTLS_SSL_PRESET_XXX value
markrad	0:cdf462088d13	2516	*
markrad	0:cdf462088d13	2517	* \note See \c mbedtls_ssl_conf_transport() for notes on DTLS.
markrad	0:cdf462088d13	2518	*
markrad	0:cdf462088d13	2519	* \return 0 if successful, or
markrad	0:cdf462088d13	2520	* MBEDTLS_ERR_XXX_ALLOC_FAILED on memory allocation error.
markrad	0:cdf462088d13	2521	*/
markrad	0:cdf462088d13	2522	int mbedtls_ssl_config_defaults( mbedtls_ssl_config *conf,
markrad	0:cdf462088d13	2523	int endpoint, int transport, int preset );
markrad	0:cdf462088d13	2524
markrad	0:cdf462088d13	2525	/**
markrad	0:cdf462088d13	2526	* \brief Free an SSL configuration context
markrad	0:cdf462088d13	2527	*
markrad	0:cdf462088d13	2528	* \param conf SSL configuration context
markrad	0:cdf462088d13	2529	*/
markrad	0:cdf462088d13	2530	void mbedtls_ssl_config_free( mbedtls_ssl_config *conf );
markrad	0:cdf462088d13	2531
markrad	0:cdf462088d13	2532	/**
markrad	0:cdf462088d13	2533	* \brief Initialize SSL session structure
markrad	0:cdf462088d13	2534	*
markrad	0:cdf462088d13	2535	* \param session SSL session
markrad	0:cdf462088d13	2536	*/
markrad	0:cdf462088d13	2537	void mbedtls_ssl_session_init( mbedtls_ssl_session *session );
markrad	0:cdf462088d13	2538
markrad	0:cdf462088d13	2539	/**
markrad	0:cdf462088d13	2540	* \brief Free referenced items in an SSL session including the
markrad	0:cdf462088d13	2541	* peer certificate and clear memory
markrad	0:cdf462088d13	2542	*
markrad	0:cdf462088d13	2543	* \param session SSL session
markrad	0:cdf462088d13	2544	*/
markrad	0:cdf462088d13	2545	void mbedtls_ssl_session_free( mbedtls_ssl_session *session );
markrad	0:cdf462088d13	2546
markrad	0:cdf462088d13	2547	#ifdef __cplusplus
markrad	0:cdf462088d13	2548	}
markrad	0:cdf462088d13	2549	#endif
markrad	0:cdf462088d13	2550
markrad	0:cdf462088d13	2551	#endif /* ssl.h */

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Type:	Library
Created:	04 Jun 2019
Imports:	1
Forks:	0
Commits:	2
Dependents:	1
Dependencies:	0
Followers:	2

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Willie Solano

Pablo Andrés Araya Castillo

include/mbedtls/ssl.h@1:1a219dea6cb5, 2019-06-04 (annotated)

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