sandbox
mbedtls ported to mbed-classic
Fork of
mbedtls
by 
Christopher Haster
source/pkwrite.c@1:24750b9ad5ef, 2016-01-22 (annotated)
- Committer:
- Christopher Haster
- Date:
- Fri Jan 22 16:44:49 2016 -0600
- Revision:
- 1:24750b9ad5ef
Initial move of mbedtls to mercurial
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| Christopher Haster |
1:24750b9ad5ef | 1 | /* |
| Christopher Haster |
1:24750b9ad5ef | 2 | * Public Key layer for writing key files and structures |
| Christopher Haster |
1:24750b9ad5ef | 3 | * |
| Christopher Haster |
1:24750b9ad5ef | 4 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved |
| Christopher Haster |
1:24750b9ad5ef | 5 | * SPDX-License-Identifier: Apache-2.0 |
| Christopher Haster |
1:24750b9ad5ef | 6 | * |
| Christopher Haster |
1:24750b9ad5ef | 7 | * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| Christopher Haster |
1:24750b9ad5ef | 8 | * not use this file except in compliance with the License. |
| Christopher Haster |
1:24750b9ad5ef | 9 | * You may obtain a copy of the License at |
| Christopher Haster |
1:24750b9ad5ef | 10 | * |
| Christopher Haster |
1:24750b9ad5ef | 11 | * http://www.apache.org/licenses/LICENSE-2.0 |
| Christopher Haster |
1:24750b9ad5ef | 12 | * |
| Christopher Haster |
1:24750b9ad5ef | 13 | * Unless required by applicable law or agreed to in writing, software |
| Christopher Haster |
1:24750b9ad5ef | 14 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| Christopher Haster |
1:24750b9ad5ef | 15 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| Christopher Haster |
1:24750b9ad5ef | 16 | * See the License for the specific language governing permissions and |
| Christopher Haster |
1:24750b9ad5ef | 17 | * limitations under the License. |
| Christopher Haster |
1:24750b9ad5ef | 18 | * |
| Christopher Haster |
1:24750b9ad5ef | 19 | * This file is part of mbed TLS (https://tls.mbed.org) |
| Christopher Haster |
1:24750b9ad5ef | 20 | */ |
| Christopher Haster |
1:24750b9ad5ef | 21 | |
| Christopher Haster |
1:24750b9ad5ef | 22 | #if !defined(MBEDTLS_CONFIG_FILE) |
| Christopher Haster |
1:24750b9ad5ef | 23 | #include "mbedtls/config.h" |
| Christopher Haster |
1:24750b9ad5ef | 24 | #else |
| Christopher Haster |
1:24750b9ad5ef | 25 | #include MBEDTLS_CONFIG_FILE |
| Christopher Haster |
1:24750b9ad5ef | 26 | #endif |
| Christopher Haster |
1:24750b9ad5ef | 27 | |
| Christopher Haster |
1:24750b9ad5ef | 28 | #if defined(MBEDTLS_PK_WRITE_C) |
| Christopher Haster |
1:24750b9ad5ef | 29 | |
| Christopher Haster |
1:24750b9ad5ef | 30 | #include "mbedtls/pk.h" |
| Christopher Haster |
1:24750b9ad5ef | 31 | #include "mbedtls/asn1write.h" |
| Christopher Haster |
1:24750b9ad5ef | 32 | #include "mbedtls/oid.h" |
| Christopher Haster |
1:24750b9ad5ef | 33 | |
| Christopher Haster |
1:24750b9ad5ef | 34 | #include <string.h> |
| Christopher Haster |
1:24750b9ad5ef | 35 | |
| Christopher Haster |
1:24750b9ad5ef | 36 | #if defined(MBEDTLS_RSA_C) |
| Christopher Haster |
1:24750b9ad5ef | 37 | #include "mbedtls/rsa.h" |
| Christopher Haster |
1:24750b9ad5ef | 38 | #endif |
| Christopher Haster |
1:24750b9ad5ef | 39 | #if defined(MBEDTLS_ECP_C) |
| Christopher Haster |
1:24750b9ad5ef | 40 | #include "mbedtls/ecp.h" |
| Christopher Haster |
1:24750b9ad5ef | 41 | #endif |
| Christopher Haster |
1:24750b9ad5ef | 42 | #if defined(MBEDTLS_ECDSA_C) |
| Christopher Haster |
1:24750b9ad5ef | 43 | #include "mbedtls/ecdsa.h" |
| Christopher Haster |
1:24750b9ad5ef | 44 | #endif |
| Christopher Haster |
1:24750b9ad5ef | 45 | #if defined(MBEDTLS_PEM_WRITE_C) |
| Christopher Haster |
1:24750b9ad5ef | 46 | #include "mbedtls/pem.h" |
| Christopher Haster |
1:24750b9ad5ef | 47 | #endif |
| Christopher Haster |
1:24750b9ad5ef | 48 | |
| Christopher Haster |
1:24750b9ad5ef | 49 | #if defined(MBEDTLS_PLATFORM_C) |
| Christopher Haster |
1:24750b9ad5ef | 50 | #include "mbedtls/platform.h" |
| Christopher Haster |
1:24750b9ad5ef | 51 | #else |
| Christopher Haster |
1:24750b9ad5ef | 52 | #include <stdlib.h> |
| Christopher Haster |
1:24750b9ad5ef | 53 | #define mbedtls_calloc calloc |
| Christopher Haster |
1:24750b9ad5ef | 54 | #define mbedtls_free free |
| Christopher Haster |
1:24750b9ad5ef | 55 | #endif |
| Christopher Haster |
1:24750b9ad5ef | 56 | |
| Christopher Haster |
1:24750b9ad5ef | 57 | #if defined(MBEDTLS_RSA_C) |
| Christopher Haster |
1:24750b9ad5ef | 58 | /* |
| Christopher Haster |
1:24750b9ad5ef | 59 | * RSAPublicKey ::= SEQUENCE { |
| Christopher Haster |
1:24750b9ad5ef | 60 | * modulus INTEGER, -- n |
| Christopher Haster |
1:24750b9ad5ef | 61 | * publicExponent INTEGER -- e |
| Christopher Haster |
1:24750b9ad5ef | 62 | * } |
| Christopher Haster |
1:24750b9ad5ef | 63 | */ |
| Christopher Haster |
1:24750b9ad5ef | 64 | static int pk_write_rsa_pubkey( unsigned char **p, unsigned char *start, |
| Christopher Haster |
1:24750b9ad5ef | 65 | mbedtls_rsa_context *rsa ) |
| Christopher Haster |
1:24750b9ad5ef | 66 | { |
| Christopher Haster |
1:24750b9ad5ef | 67 | int ret; |
| Christopher Haster |
1:24750b9ad5ef | 68 | size_t len = 0; |
| Christopher Haster |
1:24750b9ad5ef | 69 | |
| Christopher Haster |
1:24750b9ad5ef | 70 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_mpi( p, start, &rsa->E ) ); |
| Christopher Haster |
1:24750b9ad5ef | 71 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_mpi( p, start, &rsa->N ) ); |
| Christopher Haster |
1:24750b9ad5ef | 72 | |
| Christopher Haster |
1:24750b9ad5ef | 73 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) ); |
| Christopher Haster |
1:24750b9ad5ef | 74 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED | |
| Christopher Haster |
1:24750b9ad5ef | 75 | MBEDTLS_ASN1_SEQUENCE ) ); |
| Christopher Haster |
1:24750b9ad5ef | 76 | |
| Christopher Haster |
1:24750b9ad5ef | 77 | return( (int) len ); |
| Christopher Haster |
1:24750b9ad5ef | 78 | } |
| Christopher Haster |
1:24750b9ad5ef | 79 | #endif /* MBEDTLS_RSA_C */ |
| Christopher Haster |
1:24750b9ad5ef | 80 | |
| Christopher Haster |
1:24750b9ad5ef | 81 | #if defined(MBEDTLS_ECP_C) |
| Christopher Haster |
1:24750b9ad5ef | 82 | /* |
| Christopher Haster |
1:24750b9ad5ef | 83 | * EC public key is an EC point |
| Christopher Haster |
1:24750b9ad5ef | 84 | */ |
| Christopher Haster |
1:24750b9ad5ef | 85 | static int pk_write_ec_pubkey( unsigned char **p, unsigned char *start, |
| Christopher Haster |
1:24750b9ad5ef | 86 | mbedtls_ecp_keypair *ec ) |
| Christopher Haster |
1:24750b9ad5ef | 87 | { |
| Christopher Haster |
1:24750b9ad5ef | 88 | int ret; |
| Christopher Haster |
1:24750b9ad5ef | 89 | size_t len = 0; |
| Christopher Haster |
1:24750b9ad5ef | 90 | unsigned char buf[MBEDTLS_ECP_MAX_PT_LEN]; |
| Christopher Haster |
1:24750b9ad5ef | 91 | |
| Christopher Haster |
1:24750b9ad5ef | 92 | if( ( ret = mbedtls_ecp_point_write_binary( &ec->grp, &ec->Q, |
| Christopher Haster |
1:24750b9ad5ef | 93 | MBEDTLS_ECP_PF_UNCOMPRESSED, |
| Christopher Haster |
1:24750b9ad5ef | 94 | &len, buf, sizeof( buf ) ) ) != 0 ) |
| Christopher Haster |
1:24750b9ad5ef | 95 | { |
| Christopher Haster |
1:24750b9ad5ef | 96 | return( ret ); |
| Christopher Haster |
1:24750b9ad5ef | 97 | } |
| Christopher Haster |
1:24750b9ad5ef | 98 | |
| Christopher Haster |
1:24750b9ad5ef | 99 | if( *p < start || (size_t)( *p - start ) < len ) |
| Christopher Haster |
1:24750b9ad5ef | 100 | return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); |
| Christopher Haster |
1:24750b9ad5ef | 101 | |
| Christopher Haster |
1:24750b9ad5ef | 102 | *p -= len; |
| Christopher Haster |
1:24750b9ad5ef | 103 | memcpy( *p, buf, len ); |
| Christopher Haster |
1:24750b9ad5ef | 104 | |
| Christopher Haster |
1:24750b9ad5ef | 105 | return( (int) len ); |
| Christopher Haster |
1:24750b9ad5ef | 106 | } |
| Christopher Haster |
1:24750b9ad5ef | 107 | |
| Christopher Haster |
1:24750b9ad5ef | 108 | /* |
| Christopher Haster |
1:24750b9ad5ef | 109 | * ECParameters ::= CHOICE { |
| Christopher Haster |
1:24750b9ad5ef | 110 | * namedCurve OBJECT IDENTIFIER |
| Christopher Haster |
1:24750b9ad5ef | 111 | * } |
| Christopher Haster |
1:24750b9ad5ef | 112 | */ |
| Christopher Haster |
1:24750b9ad5ef | 113 | static int pk_write_ec_param( unsigned char **p, unsigned char *start, |
| Christopher Haster |
1:24750b9ad5ef | 114 | mbedtls_ecp_keypair *ec ) |
| Christopher Haster |
1:24750b9ad5ef | 115 | { |
| Christopher Haster |
1:24750b9ad5ef | 116 | int ret; |
| Christopher Haster |
1:24750b9ad5ef | 117 | size_t len = 0; |
| Christopher Haster |
1:24750b9ad5ef | 118 | const char *oid; |
| Christopher Haster |
1:24750b9ad5ef | 119 | size_t oid_len; |
| Christopher Haster |
1:24750b9ad5ef | 120 | |
| Christopher Haster |
1:24750b9ad5ef | 121 | if( ( ret = mbedtls_oid_get_oid_by_ec_grp( ec->grp.id, &oid, &oid_len ) ) != 0 ) |
| Christopher Haster |
1:24750b9ad5ef | 122 | return( ret ); |
| Christopher Haster |
1:24750b9ad5ef | 123 | |
| Christopher Haster |
1:24750b9ad5ef | 124 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_oid( p, start, oid, oid_len ) ); |
| Christopher Haster |
1:24750b9ad5ef | 125 | |
| Christopher Haster |
1:24750b9ad5ef | 126 | return( (int) len ); |
| Christopher Haster |
1:24750b9ad5ef | 127 | } |
| Christopher Haster |
1:24750b9ad5ef | 128 | #endif /* MBEDTLS_ECP_C */ |
| Christopher Haster |
1:24750b9ad5ef | 129 | |
| Christopher Haster |
1:24750b9ad5ef | 130 | int mbedtls_pk_write_pubkey( unsigned char **p, unsigned char *start, |
| Christopher Haster |
1:24750b9ad5ef | 131 | const mbedtls_pk_context *key ) |
| Christopher Haster |
1:24750b9ad5ef | 132 | { |
| Christopher Haster |
1:24750b9ad5ef | 133 | int ret; |
| Christopher Haster |
1:24750b9ad5ef | 134 | size_t len = 0; |
| Christopher Haster |
1:24750b9ad5ef | 135 | |
| Christopher Haster |
1:24750b9ad5ef | 136 | #if defined(MBEDTLS_RSA_C) |
| Christopher Haster |
1:24750b9ad5ef | 137 | if( mbedtls_pk_get_type( key ) == MBEDTLS_PK_RSA ) |
| Christopher Haster |
1:24750b9ad5ef | 138 | MBEDTLS_ASN1_CHK_ADD( len, pk_write_rsa_pubkey( p, start, mbedtls_pk_rsa( *key ) ) ); |
| Christopher Haster |
1:24750b9ad5ef | 139 | else |
| Christopher Haster |
1:24750b9ad5ef | 140 | #endif |
| Christopher Haster |
1:24750b9ad5ef | 141 | #if defined(MBEDTLS_ECP_C) |
| Christopher Haster |
1:24750b9ad5ef | 142 | if( mbedtls_pk_get_type( key ) == MBEDTLS_PK_ECKEY ) |
| Christopher Haster |
1:24750b9ad5ef | 143 | MBEDTLS_ASN1_CHK_ADD( len, pk_write_ec_pubkey( p, start, mbedtls_pk_ec( *key ) ) ); |
| Christopher Haster |
1:24750b9ad5ef | 144 | else |
| Christopher Haster |
1:24750b9ad5ef | 145 | #endif |
| Christopher Haster |
1:24750b9ad5ef | 146 | return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE ); |
| Christopher Haster |
1:24750b9ad5ef | 147 | |
| Christopher Haster |
1:24750b9ad5ef | 148 | return( (int) len ); |
| Christopher Haster |
1:24750b9ad5ef | 149 | } |
| Christopher Haster |
1:24750b9ad5ef | 150 | |
| Christopher Haster |
1:24750b9ad5ef | 151 | int mbedtls_pk_write_pubkey_der( mbedtls_pk_context *key, unsigned char *buf, size_t size ) |
| Christopher Haster |
1:24750b9ad5ef | 152 | { |
| Christopher Haster |
1:24750b9ad5ef | 153 | int ret; |
| Christopher Haster |
1:24750b9ad5ef | 154 | unsigned char *c; |
| Christopher Haster |
1:24750b9ad5ef | 155 | size_t len = 0, par_len = 0, oid_len; |
| Christopher Haster |
1:24750b9ad5ef | 156 | const char *oid; |
| Christopher Haster |
1:24750b9ad5ef | 157 | |
| Christopher Haster |
1:24750b9ad5ef | 158 | c = buf + size; |
| Christopher Haster |
1:24750b9ad5ef | 159 | |
| Christopher Haster |
1:24750b9ad5ef | 160 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_pk_write_pubkey( &c, buf, key ) ); |
| Christopher Haster |
1:24750b9ad5ef | 161 | |
| Christopher Haster |
1:24750b9ad5ef | 162 | if( c - buf < 1 ) |
| Christopher Haster |
1:24750b9ad5ef | 163 | return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); |
| Christopher Haster |
1:24750b9ad5ef | 164 | |
| Christopher Haster |
1:24750b9ad5ef | 165 | /* |
| Christopher Haster |
1:24750b9ad5ef | 166 | * SubjectPublicKeyInfo ::= SEQUENCE { |
| Christopher Haster |
1:24750b9ad5ef | 167 | * algorithm AlgorithmIdentifier, |
| Christopher Haster |
1:24750b9ad5ef | 168 | * subjectPublicKey BIT STRING } |
| Christopher Haster |
1:24750b9ad5ef | 169 | */ |
| Christopher Haster |
1:24750b9ad5ef | 170 | *--c = 0; |
| Christopher Haster |
1:24750b9ad5ef | 171 | len += 1; |
| Christopher Haster |
1:24750b9ad5ef | 172 | |
| Christopher Haster |
1:24750b9ad5ef | 173 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) ); |
| Christopher Haster |
1:24750b9ad5ef | 174 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_BIT_STRING ) ); |
| Christopher Haster |
1:24750b9ad5ef | 175 | |
| Christopher Haster |
1:24750b9ad5ef | 176 | if( ( ret = mbedtls_oid_get_oid_by_pk_alg( mbedtls_pk_get_type( key ), |
| Christopher Haster |
1:24750b9ad5ef | 177 | &oid, &oid_len ) ) != 0 ) |
| Christopher Haster |
1:24750b9ad5ef | 178 | { |
| Christopher Haster |
1:24750b9ad5ef | 179 | return( ret ); |
| Christopher Haster |
1:24750b9ad5ef | 180 | } |
| Christopher Haster |
1:24750b9ad5ef | 181 | |
| Christopher Haster |
1:24750b9ad5ef | 182 | #if defined(MBEDTLS_ECP_C) |
| Christopher Haster |
1:24750b9ad5ef | 183 | if( mbedtls_pk_get_type( key ) == MBEDTLS_PK_ECKEY ) |
| Christopher Haster |
1:24750b9ad5ef | 184 | { |
| Christopher Haster |
1:24750b9ad5ef | 185 | MBEDTLS_ASN1_CHK_ADD( par_len, pk_write_ec_param( &c, buf, mbedtls_pk_ec( *key ) ) ); |
| Christopher Haster |
1:24750b9ad5ef | 186 | } |
| Christopher Haster |
1:24750b9ad5ef | 187 | #endif |
| Christopher Haster |
1:24750b9ad5ef | 188 | |
| Christopher Haster |
1:24750b9ad5ef | 189 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_algorithm_identifier( &c, buf, oid, oid_len, |
| Christopher Haster |
1:24750b9ad5ef | 190 | par_len ) ); |
| Christopher Haster |
1:24750b9ad5ef | 191 | |
| Christopher Haster |
1:24750b9ad5ef | 192 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) ); |
| Christopher Haster |
1:24750b9ad5ef | 193 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_CONSTRUCTED | |
| Christopher Haster |
1:24750b9ad5ef | 194 | MBEDTLS_ASN1_SEQUENCE ) ); |
| Christopher Haster |
1:24750b9ad5ef | 195 | |
| Christopher Haster |
1:24750b9ad5ef | 196 | return( (int) len ); |
| Christopher Haster |
1:24750b9ad5ef | 197 | } |
| Christopher Haster |
1:24750b9ad5ef | 198 | |
| Christopher Haster |
1:24750b9ad5ef | 199 | int mbedtls_pk_write_key_der( mbedtls_pk_context *key, unsigned char *buf, size_t size ) |
| Christopher Haster |
1:24750b9ad5ef | 200 | { |
| Christopher Haster |
1:24750b9ad5ef | 201 | int ret; |
| Christopher Haster |
1:24750b9ad5ef | 202 | unsigned char *c = buf + size; |
| Christopher Haster |
1:24750b9ad5ef | 203 | size_t len = 0; |
| Christopher Haster |
1:24750b9ad5ef | 204 | |
| Christopher Haster |
1:24750b9ad5ef | 205 | #if defined(MBEDTLS_RSA_C) |
| Christopher Haster |
1:24750b9ad5ef | 206 | if( mbedtls_pk_get_type( key ) == MBEDTLS_PK_RSA ) |
| Christopher Haster |
1:24750b9ad5ef | 207 | { |
| Christopher Haster |
1:24750b9ad5ef | 208 | mbedtls_rsa_context *rsa = mbedtls_pk_rsa( *key ); |
| Christopher Haster |
1:24750b9ad5ef | 209 | |
| Christopher Haster |
1:24750b9ad5ef | 210 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_mpi( &c, buf, &rsa->QP ) ); |
| Christopher Haster |
1:24750b9ad5ef | 211 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_mpi( &c, buf, &rsa->DQ ) ); |
| Christopher Haster |
1:24750b9ad5ef | 212 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_mpi( &c, buf, &rsa->DP ) ); |
| Christopher Haster |
1:24750b9ad5ef | 213 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_mpi( &c, buf, &rsa->Q ) ); |
| Christopher Haster |
1:24750b9ad5ef | 214 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_mpi( &c, buf, &rsa->P ) ); |
| Christopher Haster |
1:24750b9ad5ef | 215 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_mpi( &c, buf, &rsa->D ) ); |
| Christopher Haster |
1:24750b9ad5ef | 216 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_mpi( &c, buf, &rsa->E ) ); |
| Christopher Haster |
1:24750b9ad5ef | 217 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_mpi( &c, buf, &rsa->N ) ); |
| Christopher Haster |
1:24750b9ad5ef | 218 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_int( &c, buf, 0 ) ); |
| Christopher Haster |
1:24750b9ad5ef | 219 | |
| Christopher Haster |
1:24750b9ad5ef | 220 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) ); |
| Christopher Haster |
1:24750b9ad5ef | 221 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_CONSTRUCTED | |
| Christopher Haster |
1:24750b9ad5ef | 222 | MBEDTLS_ASN1_SEQUENCE ) ); |
| Christopher Haster |
1:24750b9ad5ef | 223 | } |
| Christopher Haster |
1:24750b9ad5ef | 224 | else |
| Christopher Haster |
1:24750b9ad5ef | 225 | #endif /* MBEDTLS_RSA_C */ |
| Christopher Haster |
1:24750b9ad5ef | 226 | #if defined(MBEDTLS_ECP_C) |
| Christopher Haster |
1:24750b9ad5ef | 227 | if( mbedtls_pk_get_type( key ) == MBEDTLS_PK_ECKEY ) |
| Christopher Haster |
1:24750b9ad5ef | 228 | { |
| Christopher Haster |
1:24750b9ad5ef | 229 | mbedtls_ecp_keypair *ec = mbedtls_pk_ec( *key ); |
| Christopher Haster |
1:24750b9ad5ef | 230 | size_t pub_len = 0, par_len = 0; |
| Christopher Haster |
1:24750b9ad5ef | 231 | |
| Christopher Haster |
1:24750b9ad5ef | 232 | /* |
| Christopher Haster |
1:24750b9ad5ef | 233 | * RFC 5915, or SEC1 Appendix C.4 |
| Christopher Haster |
1:24750b9ad5ef | 234 | * |
| Christopher Haster |
1:24750b9ad5ef | 235 | * ECPrivateKey ::= SEQUENCE { |
| Christopher Haster |
1:24750b9ad5ef | 236 | * version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1), |
| Christopher Haster |
1:24750b9ad5ef | 237 | * privateKey OCTET STRING, |
| Christopher Haster |
1:24750b9ad5ef | 238 | * parameters [0] ECParameters {{ NamedCurve }} OPTIONAL, |
| Christopher Haster |
1:24750b9ad5ef | 239 | * publicKey [1] BIT STRING OPTIONAL |
| Christopher Haster |
1:24750b9ad5ef | 240 | * } |
| Christopher Haster |
1:24750b9ad5ef | 241 | */ |
| Christopher Haster |
1:24750b9ad5ef | 242 | |
| Christopher Haster |
1:24750b9ad5ef | 243 | /* publicKey */ |
| Christopher Haster |
1:24750b9ad5ef | 244 | MBEDTLS_ASN1_CHK_ADD( pub_len, pk_write_ec_pubkey( &c, buf, ec ) ); |
| Christopher Haster |
1:24750b9ad5ef | 245 | |
| Christopher Haster |
1:24750b9ad5ef | 246 | if( c - buf < 1 ) |
| Christopher Haster |
1:24750b9ad5ef | 247 | return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); |
| Christopher Haster |
1:24750b9ad5ef | 248 | *--c = 0; |
| Christopher Haster |
1:24750b9ad5ef | 249 | pub_len += 1; |
| Christopher Haster |
1:24750b9ad5ef | 250 | |
| Christopher Haster |
1:24750b9ad5ef | 251 | MBEDTLS_ASN1_CHK_ADD( pub_len, mbedtls_asn1_write_len( &c, buf, pub_len ) ); |
| Christopher Haster |
1:24750b9ad5ef | 252 | MBEDTLS_ASN1_CHK_ADD( pub_len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_BIT_STRING ) ); |
| Christopher Haster |
1:24750b9ad5ef | 253 | |
| Christopher Haster |
1:24750b9ad5ef | 254 | MBEDTLS_ASN1_CHK_ADD( pub_len, mbedtls_asn1_write_len( &c, buf, pub_len ) ); |
| Christopher Haster |
1:24750b9ad5ef | 255 | MBEDTLS_ASN1_CHK_ADD( pub_len, mbedtls_asn1_write_tag( &c, buf, |
| Christopher Haster |
1:24750b9ad5ef | 256 | MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 1 ) ); |
| Christopher Haster |
1:24750b9ad5ef | 257 | len += pub_len; |
| Christopher Haster |
1:24750b9ad5ef | 258 | |
| Christopher Haster |
1:24750b9ad5ef | 259 | /* parameters */ |
| Christopher Haster |
1:24750b9ad5ef | 260 | MBEDTLS_ASN1_CHK_ADD( par_len, pk_write_ec_param( &c, buf, ec ) ); |
| Christopher Haster |
1:24750b9ad5ef | 261 | |
| Christopher Haster |
1:24750b9ad5ef | 262 | MBEDTLS_ASN1_CHK_ADD( par_len, mbedtls_asn1_write_len( &c, buf, par_len ) ); |
| Christopher Haster |
1:24750b9ad5ef | 263 | MBEDTLS_ASN1_CHK_ADD( par_len, mbedtls_asn1_write_tag( &c, buf, |
| Christopher Haster |
1:24750b9ad5ef | 264 | MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 0 ) ); |
| Christopher Haster |
1:24750b9ad5ef | 265 | len += par_len; |
| Christopher Haster |
1:24750b9ad5ef | 266 | |
| Christopher Haster |
1:24750b9ad5ef | 267 | /* privateKey: write as MPI then fix tag */ |
| Christopher Haster |
1:24750b9ad5ef | 268 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_mpi( &c, buf, &ec->d ) ); |
| Christopher Haster |
1:24750b9ad5ef | 269 | *c = MBEDTLS_ASN1_OCTET_STRING; |
| Christopher Haster |
1:24750b9ad5ef | 270 | |
| Christopher Haster |
1:24750b9ad5ef | 271 | /* version */ |
| Christopher Haster |
1:24750b9ad5ef | 272 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_int( &c, buf, 1 ) ); |
| Christopher Haster |
1:24750b9ad5ef | 273 | |
| Christopher Haster |
1:24750b9ad5ef | 274 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) ); |
| Christopher Haster |
1:24750b9ad5ef | 275 | MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_CONSTRUCTED | |
| Christopher Haster |
1:24750b9ad5ef | 276 | MBEDTLS_ASN1_SEQUENCE ) ); |
| Christopher Haster |
1:24750b9ad5ef | 277 | } |
| Christopher Haster |
1:24750b9ad5ef | 278 | else |
| Christopher Haster |
1:24750b9ad5ef | 279 | #endif /* MBEDTLS_ECP_C */ |
| Christopher Haster |
1:24750b9ad5ef | 280 | return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE ); |
| Christopher Haster |
1:24750b9ad5ef | 281 | |
| Christopher Haster |
1:24750b9ad5ef | 282 | return( (int) len ); |
| Christopher Haster |
1:24750b9ad5ef | 283 | } |
| Christopher Haster |
1:24750b9ad5ef | 284 | |
| Christopher Haster |
1:24750b9ad5ef | 285 | #if defined(MBEDTLS_PEM_WRITE_C) |
| Christopher Haster |
1:24750b9ad5ef | 286 | |
| Christopher Haster |
1:24750b9ad5ef | 287 | #define PEM_BEGIN_PUBLIC_KEY "-----BEGIN PUBLIC KEY-----\n" |
| Christopher Haster |
1:24750b9ad5ef | 288 | #define PEM_END_PUBLIC_KEY "-----END PUBLIC KEY-----\n" |
| Christopher Haster |
1:24750b9ad5ef | 289 | |
| Christopher Haster |
1:24750b9ad5ef | 290 | #define PEM_BEGIN_PRIVATE_KEY_RSA "-----BEGIN RSA PRIVATE KEY-----\n" |
| Christopher Haster |
1:24750b9ad5ef | 291 | #define PEM_END_PRIVATE_KEY_RSA "-----END RSA PRIVATE KEY-----\n" |
| Christopher Haster |
1:24750b9ad5ef | 292 | #define PEM_BEGIN_PRIVATE_KEY_EC "-----BEGIN EC PRIVATE KEY-----\n" |
| Christopher Haster |
1:24750b9ad5ef | 293 | #define PEM_END_PRIVATE_KEY_EC "-----END EC PRIVATE KEY-----\n" |
| Christopher Haster |
1:24750b9ad5ef | 294 | |
| Christopher Haster |
1:24750b9ad5ef | 295 | /* |
| Christopher Haster |
1:24750b9ad5ef | 296 | * Max sizes of key per types. Shown as tag + len (+ content). |
| Christopher Haster |
1:24750b9ad5ef | 297 | */ |
| Christopher Haster |
1:24750b9ad5ef | 298 | |
| Christopher Haster |
1:24750b9ad5ef | 299 | #if defined(MBEDTLS_RSA_C) |
| Christopher Haster |
1:24750b9ad5ef | 300 | /* |
| Christopher Haster |
1:24750b9ad5ef | 301 | * RSA public keys: |
| Christopher Haster |
1:24750b9ad5ef | 302 | * SubjectPublicKeyInfo ::= SEQUENCE { 1 + 3 |
| Christopher Haster |
1:24750b9ad5ef | 303 | * algorithm AlgorithmIdentifier, 1 + 1 (sequence) |
| Christopher Haster |
1:24750b9ad5ef | 304 | * + 1 + 1 + 9 (rsa oid) |
| Christopher Haster |
1:24750b9ad5ef | 305 | * + 1 + 1 (params null) |
| Christopher Haster |
1:24750b9ad5ef | 306 | * subjectPublicKey BIT STRING } 1 + 3 + (1 + below) |
| Christopher Haster |
1:24750b9ad5ef | 307 | * RSAPublicKey ::= SEQUENCE { 1 + 3 |
| Christopher Haster |
1:24750b9ad5ef | 308 | * modulus INTEGER, -- n 1 + 3 + MPI_MAX + 1 |
| Christopher Haster |
1:24750b9ad5ef | 309 | * publicExponent INTEGER -- e 1 + 3 + MPI_MAX + 1 |
| Christopher Haster |
1:24750b9ad5ef | 310 | * } |
| Christopher Haster |
1:24750b9ad5ef | 311 | */ |
| Christopher Haster |
1:24750b9ad5ef | 312 | #define RSA_PUB_DER_MAX_BYTES 38 + 2 * MBEDTLS_MPI_MAX_SIZE |
| Christopher Haster |
1:24750b9ad5ef | 313 | |
| Christopher Haster |
1:24750b9ad5ef | 314 | /* |
| Christopher Haster |
1:24750b9ad5ef | 315 | * RSA private keys: |
| Christopher Haster |
1:24750b9ad5ef | 316 | * RSAPrivateKey ::= SEQUENCE { 1 + 3 |
| Christopher Haster |
1:24750b9ad5ef | 317 | * version Version, 1 + 1 + 1 |
| Christopher Haster |
1:24750b9ad5ef | 318 | * modulus INTEGER, 1 + 3 + MPI_MAX + 1 |
| Christopher Haster |
1:24750b9ad5ef | 319 | * publicExponent INTEGER, 1 + 3 + MPI_MAX + 1 |
| Christopher Haster |
1:24750b9ad5ef | 320 | * privateExponent INTEGER, 1 + 3 + MPI_MAX + 1 |
| Christopher Haster |
1:24750b9ad5ef | 321 | * prime1 INTEGER, 1 + 3 + MPI_MAX / 2 + 1 |
| Christopher Haster |
1:24750b9ad5ef | 322 | * prime2 INTEGER, 1 + 3 + MPI_MAX / 2 + 1 |
| Christopher Haster |
1:24750b9ad5ef | 323 | * exponent1 INTEGER, 1 + 3 + MPI_MAX / 2 + 1 |
| Christopher Haster |
1:24750b9ad5ef | 324 | * exponent2 INTEGER, 1 + 3 + MPI_MAX / 2 + 1 |
| Christopher Haster |
1:24750b9ad5ef | 325 | * coefficient INTEGER, 1 + 3 + MPI_MAX / 2 + 1 |
| Christopher Haster |
1:24750b9ad5ef | 326 | * otherPrimeInfos OtherPrimeInfos OPTIONAL 0 (not supported) |
| Christopher Haster |
1:24750b9ad5ef | 327 | * } |
| Christopher Haster |
1:24750b9ad5ef | 328 | */ |
| Christopher Haster |
1:24750b9ad5ef | 329 | #define MPI_MAX_SIZE_2 MBEDTLS_MPI_MAX_SIZE / 2 + \ |
| Christopher Haster |
1:24750b9ad5ef | 330 | MBEDTLS_MPI_MAX_SIZE % 2 |
| Christopher Haster |
1:24750b9ad5ef | 331 | #define RSA_PRV_DER_MAX_BYTES 47 + 3 * MBEDTLS_MPI_MAX_SIZE \ |
| Christopher Haster |
1:24750b9ad5ef | 332 | + 5 * MPI_MAX_SIZE_2 |
| Christopher Haster |
1:24750b9ad5ef | 333 | |
| Christopher Haster |
1:24750b9ad5ef | 334 | #else /* MBEDTLS_RSA_C */ |
| Christopher Haster |
1:24750b9ad5ef | 335 | |
| Christopher Haster |
1:24750b9ad5ef | 336 | #define RSA_PUB_DER_MAX_BYTES 0 |
| Christopher Haster |
1:24750b9ad5ef | 337 | #define RSA_PRV_DER_MAX_BYTES 0 |
| Christopher Haster |
1:24750b9ad5ef | 338 | |
| Christopher Haster |
1:24750b9ad5ef | 339 | #endif /* MBEDTLS_RSA_C */ |
| Christopher Haster |
1:24750b9ad5ef | 340 | |
| Christopher Haster |
1:24750b9ad5ef | 341 | #if defined(MBEDTLS_ECP_C) |
| Christopher Haster |
1:24750b9ad5ef | 342 | /* |
| Christopher Haster |
1:24750b9ad5ef | 343 | * EC public keys: |
| Christopher Haster |
1:24750b9ad5ef | 344 | * SubjectPublicKeyInfo ::= SEQUENCE { 1 + 2 |
| Christopher Haster |
1:24750b9ad5ef | 345 | * algorithm AlgorithmIdentifier, 1 + 1 (sequence) |
| Christopher Haster |
1:24750b9ad5ef | 346 | * + 1 + 1 + 7 (ec oid) |
| Christopher Haster |
1:24750b9ad5ef | 347 | * + 1 + 1 + 9 (namedCurve oid) |
| Christopher Haster |
1:24750b9ad5ef | 348 | * subjectPublicKey BIT STRING 1 + 2 + 1 [1] |
| Christopher Haster |
1:24750b9ad5ef | 349 | * + 1 (point format) [1] |
| Christopher Haster |
1:24750b9ad5ef | 350 | * + 2 * ECP_MAX (coords) [1] |
| Christopher Haster |
1:24750b9ad5ef | 351 | * } |
| Christopher Haster |
1:24750b9ad5ef | 352 | */ |
| Christopher Haster |
1:24750b9ad5ef | 353 | #define ECP_PUB_DER_MAX_BYTES 30 + 2 * MBEDTLS_ECP_MAX_BYTES |
| Christopher Haster |
1:24750b9ad5ef | 354 | |
| Christopher Haster |
1:24750b9ad5ef | 355 | /* |
| Christopher Haster |
1:24750b9ad5ef | 356 | * EC private keys: |
| Christopher Haster |
1:24750b9ad5ef | 357 | * ECPrivateKey ::= SEQUENCE { 1 + 2 |
| Christopher Haster |
1:24750b9ad5ef | 358 | * version INTEGER , 1 + 1 + 1 |
| Christopher Haster |
1:24750b9ad5ef | 359 | * privateKey OCTET STRING, 1 + 1 + ECP_MAX |
| Christopher Haster |
1:24750b9ad5ef | 360 | * parameters [0] ECParameters OPTIONAL, 1 + 1 + (1 + 1 + 9) |
| Christopher Haster |
1:24750b9ad5ef | 361 | * publicKey [1] BIT STRING OPTIONAL 1 + 2 + [1] above |
| Christopher Haster |
1:24750b9ad5ef | 362 | * } |
| Christopher Haster |
1:24750b9ad5ef | 363 | */ |
| Christopher Haster |
1:24750b9ad5ef | 364 | #define ECP_PRV_DER_MAX_BYTES 29 + 3 * MBEDTLS_ECP_MAX_BYTES |
| Christopher Haster |
1:24750b9ad5ef | 365 | |
| Christopher Haster |
1:24750b9ad5ef | 366 | #else /* MBEDTLS_ECP_C */ |
| Christopher Haster |
1:24750b9ad5ef | 367 | |
| Christopher Haster |
1:24750b9ad5ef | 368 | #define ECP_PUB_DER_MAX_BYTES 0 |
| Christopher Haster |
1:24750b9ad5ef | 369 | #define ECP_PRV_DER_MAX_BYTES 0 |
| Christopher Haster |
1:24750b9ad5ef | 370 | |
| Christopher Haster |
1:24750b9ad5ef | 371 | #endif /* MBEDTLS_ECP_C */ |
| Christopher Haster |
1:24750b9ad5ef | 372 | |
| Christopher Haster |
1:24750b9ad5ef | 373 | #define PUB_DER_MAX_BYTES RSA_PUB_DER_MAX_BYTES > ECP_PUB_DER_MAX_BYTES ? \ |
| Christopher Haster |
1:24750b9ad5ef | 374 | RSA_PUB_DER_MAX_BYTES : ECP_PUB_DER_MAX_BYTES |
| Christopher Haster |
1:24750b9ad5ef | 375 | #define PRV_DER_MAX_BYTES RSA_PRV_DER_MAX_BYTES > ECP_PRV_DER_MAX_BYTES ? \ |
| Christopher Haster |
1:24750b9ad5ef | 376 | RSA_PRV_DER_MAX_BYTES : ECP_PRV_DER_MAX_BYTES |
| Christopher Haster |
1:24750b9ad5ef | 377 | |
| Christopher Haster |
1:24750b9ad5ef | 378 | int mbedtls_pk_write_pubkey_pem( mbedtls_pk_context *key, unsigned char *buf, size_t size ) |
| Christopher Haster |
1:24750b9ad5ef | 379 | { |
| Christopher Haster |
1:24750b9ad5ef | 380 | int ret; |
| Christopher Haster |
1:24750b9ad5ef | 381 | unsigned char output_buf[PUB_DER_MAX_BYTES]; |
| Christopher Haster |
1:24750b9ad5ef | 382 | size_t olen = 0; |
| Christopher Haster |
1:24750b9ad5ef | 383 | |
| Christopher Haster |
1:24750b9ad5ef | 384 | if( ( ret = mbedtls_pk_write_pubkey_der( key, output_buf, |
| Christopher Haster |
1:24750b9ad5ef | 385 | sizeof(output_buf) ) ) < 0 ) |
| Christopher Haster |
1:24750b9ad5ef | 386 | { |
| Christopher Haster |
1:24750b9ad5ef | 387 | return( ret ); |
| Christopher Haster |
1:24750b9ad5ef | 388 | } |
| Christopher Haster |
1:24750b9ad5ef | 389 | |
| Christopher Haster |
1:24750b9ad5ef | 390 | if( ( ret = mbedtls_pem_write_buffer( PEM_BEGIN_PUBLIC_KEY, PEM_END_PUBLIC_KEY, |
| Christopher Haster |
1:24750b9ad5ef | 391 | output_buf + sizeof(output_buf) - ret, |
| Christopher Haster |
1:24750b9ad5ef | 392 | ret, buf, size, &olen ) ) != 0 ) |
| Christopher Haster |
1:24750b9ad5ef | 393 | { |
| Christopher Haster |
1:24750b9ad5ef | 394 | return( ret ); |
| Christopher Haster |
1:24750b9ad5ef | 395 | } |
| Christopher Haster |
1:24750b9ad5ef | 396 | |
| Christopher Haster |
1:24750b9ad5ef | 397 | return( 0 ); |
| Christopher Haster |
1:24750b9ad5ef | 398 | } |
| Christopher Haster |
1:24750b9ad5ef | 399 | |
| Christopher Haster |
1:24750b9ad5ef | 400 | int mbedtls_pk_write_key_pem( mbedtls_pk_context *key, unsigned char *buf, size_t size ) |
| Christopher Haster |
1:24750b9ad5ef | 401 | { |
| Christopher Haster |
1:24750b9ad5ef | 402 | int ret; |
| Christopher Haster |
1:24750b9ad5ef | 403 | unsigned char output_buf[PRV_DER_MAX_BYTES]; |
| Christopher Haster |
1:24750b9ad5ef | 404 | const char *begin, *end; |
| Christopher Haster |
1:24750b9ad5ef | 405 | size_t olen = 0; |
| Christopher Haster |
1:24750b9ad5ef | 406 | |
| Christopher Haster |
1:24750b9ad5ef | 407 | if( ( ret = mbedtls_pk_write_key_der( key, output_buf, sizeof(output_buf) ) ) < 0 ) |
| Christopher Haster |
1:24750b9ad5ef | 408 | return( ret ); |
| Christopher Haster |
1:24750b9ad5ef | 409 | |
| Christopher Haster |
1:24750b9ad5ef | 410 | #if defined(MBEDTLS_RSA_C) |
| Christopher Haster |
1:24750b9ad5ef | 411 | if( mbedtls_pk_get_type( key ) == MBEDTLS_PK_RSA ) |
| Christopher Haster |
1:24750b9ad5ef | 412 | { |
| Christopher Haster |
1:24750b9ad5ef | 413 | begin = PEM_BEGIN_PRIVATE_KEY_RSA; |
| Christopher Haster |
1:24750b9ad5ef | 414 | end = PEM_END_PRIVATE_KEY_RSA; |
| Christopher Haster |
1:24750b9ad5ef | 415 | } |
| Christopher Haster |
1:24750b9ad5ef | 416 | else |
| Christopher Haster |
1:24750b9ad5ef | 417 | #endif |
| Christopher Haster |
1:24750b9ad5ef | 418 | #if defined(MBEDTLS_ECP_C) |
| Christopher Haster |
1:24750b9ad5ef | 419 | if( mbedtls_pk_get_type( key ) == MBEDTLS_PK_ECKEY ) |
| Christopher Haster |
1:24750b9ad5ef | 420 | { |
| Christopher Haster |
1:24750b9ad5ef | 421 | begin = PEM_BEGIN_PRIVATE_KEY_EC; |
| Christopher Haster |
1:24750b9ad5ef | 422 | end = PEM_END_PRIVATE_KEY_EC; |
| Christopher Haster |
1:24750b9ad5ef | 423 | } |
| Christopher Haster |
1:24750b9ad5ef | 424 | else |
| Christopher Haster |
1:24750b9ad5ef | 425 | #endif |
| Christopher Haster |
1:24750b9ad5ef | 426 | return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE ); |
| Christopher Haster |
1:24750b9ad5ef | 427 | |
| Christopher Haster |
1:24750b9ad5ef | 428 | if( ( ret = mbedtls_pem_write_buffer( begin, end, |
| Christopher Haster |
1:24750b9ad5ef | 429 | output_buf + sizeof(output_buf) - ret, |
| Christopher Haster |
1:24750b9ad5ef | 430 | ret, buf, size, &olen ) ) != 0 ) |
| Christopher Haster |
1:24750b9ad5ef | 431 | { |
| Christopher Haster |
1:24750b9ad5ef | 432 | return( ret ); |
| Christopher Haster |
1:24750b9ad5ef | 433 | } |
| Christopher Haster |
1:24750b9ad5ef | 434 | |
| Christopher Haster |
1:24750b9ad5ef | 435 | return( 0 ); |
| Christopher Haster |
1:24750b9ad5ef | 436 | } |
| Christopher Haster |
1:24750b9ad5ef | 437 | #endif /* MBEDTLS_PEM_WRITE_C */ |
| Christopher Haster |
1:24750b9ad5ef | 438 | |
| Christopher Haster |
1:24750b9ad5ef | 439 | #endif /* MBEDTLS_PK_WRITE_C */ |