Greg Steiert / pegasus_dev

Dependents:   blinky_max32630fthr

features/mbedtls/src/x509write_csr.c@3:1198227e6421, 2016-12-16 (annotated)

Committer:
switches
Date:
Fri Dec 16 16:27:57 2016 +0000
Revision:
3:1198227e6421
Parent:
0:5c4d7b2438d3 
Changed ADC scale for MAX32625 platforms to 1.2V full scale to match MAX32630 platforms

Who changed what in which revision?

UserRevisionLine numberNew contents of line
switches 0:5c4d7b2438d3 1 /*
switches 0:5c4d7b2438d3 2 * X.509 Certificate Signing Request writing
switches 0:5c4d7b2438d3 3 *
switches 0:5c4d7b2438d3 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
switches 0:5c4d7b2438d3 5 * SPDX-License-Identifier: Apache-2.0
switches 0:5c4d7b2438d3 6 *
switches 0:5c4d7b2438d3 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
switches 0:5c4d7b2438d3 8 * not use this file except in compliance with the License.
switches 0:5c4d7b2438d3 9 * You may obtain a copy of the License at
switches 0:5c4d7b2438d3 10 *
switches 0:5c4d7b2438d3 11 * http://www.apache.org/licenses/LICENSE-2.0
switches 0:5c4d7b2438d3 12 *
switches 0:5c4d7b2438d3 13 * Unless required by applicable law or agreed to in writing, software
switches 0:5c4d7b2438d3 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
switches 0:5c4d7b2438d3 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
switches 0:5c4d7b2438d3 16 * See the License for the specific language governing permissions and
switches 0:5c4d7b2438d3 17 * limitations under the License.
switches 0:5c4d7b2438d3 18 *
switches 0:5c4d7b2438d3 19 * This file is part of mbed TLS (https://tls.mbed.org)
switches 0:5c4d7b2438d3 20 */
switches 0:5c4d7b2438d3 21 /*
switches 0:5c4d7b2438d3 22 * References:
switches 0:5c4d7b2438d3 23 * - CSRs: PKCS#10 v1.7 aka RFC 2986
switches 0:5c4d7b2438d3 24 * - attributes: PKCS#9 v2.0 aka RFC 2985
switches 0:5c4d7b2438d3 25 */
switches 0:5c4d7b2438d3 26
switches 0:5c4d7b2438d3 27 #if !defined(MBEDTLS_CONFIG_FILE)
switches 0:5c4d7b2438d3 28 #include "mbedtls/config.h"
switches 0:5c4d7b2438d3 29 #else
switches 0:5c4d7b2438d3 30 #include MBEDTLS_CONFIG_FILE
switches 0:5c4d7b2438d3 31 #endif
switches 0:5c4d7b2438d3 32
switches 0:5c4d7b2438d3 33 #if defined(MBEDTLS_X509_CSR_WRITE_C)
switches 0:5c4d7b2438d3 34
switches 0:5c4d7b2438d3 35 #include "mbedtls/x509_csr.h"
switches 0:5c4d7b2438d3 36 #include "mbedtls/oid.h"
switches 0:5c4d7b2438d3 37 #include "mbedtls/asn1write.h"
switches 0:5c4d7b2438d3 38
switches 0:5c4d7b2438d3 39 #include <string.h>
switches 0:5c4d7b2438d3 40 #include <stdlib.h>
switches 0:5c4d7b2438d3 41
switches 0:5c4d7b2438d3 42 #if defined(MBEDTLS_PEM_WRITE_C)
switches 0:5c4d7b2438d3 43 #include "mbedtls/pem.h"
switches 0:5c4d7b2438d3 44 #endif
switches 0:5c4d7b2438d3 45
switches 0:5c4d7b2438d3 46 /* Implementation that should never be optimized out by the compiler */
switches 0:5c4d7b2438d3 47 static void mbedtls_zeroize( void *v, size_t n ) {
switches 0:5c4d7b2438d3 48 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
switches 0:5c4d7b2438d3 49 }
switches 0:5c4d7b2438d3 50
switches 0:5c4d7b2438d3 51 void mbedtls_x509write_csr_init( mbedtls_x509write_csr *ctx )
switches 0:5c4d7b2438d3 52 {
switches 0:5c4d7b2438d3 53 memset( ctx, 0, sizeof(mbedtls_x509write_csr) );
switches 0:5c4d7b2438d3 54 }
switches 0:5c4d7b2438d3 55
switches 0:5c4d7b2438d3 56 void mbedtls_x509write_csr_free( mbedtls_x509write_csr *ctx )
switches 0:5c4d7b2438d3 57 {
switches 0:5c4d7b2438d3 58 mbedtls_asn1_free_named_data_list( &ctx->subject );
switches 0:5c4d7b2438d3 59 mbedtls_asn1_free_named_data_list( &ctx->extensions );
switches 0:5c4d7b2438d3 60
switches 0:5c4d7b2438d3 61 mbedtls_zeroize( ctx, sizeof(mbedtls_x509write_csr) );
switches 0:5c4d7b2438d3 62 }
switches 0:5c4d7b2438d3 63
switches 0:5c4d7b2438d3 64 void mbedtls_x509write_csr_set_md_alg( mbedtls_x509write_csr *ctx, mbedtls_md_type_t md_alg )
switches 0:5c4d7b2438d3 65 {
switches 0:5c4d7b2438d3 66 ctx->md_alg = md_alg;
switches 0:5c4d7b2438d3 67 }
switches 0:5c4d7b2438d3 68
switches 0:5c4d7b2438d3 69 void mbedtls_x509write_csr_set_key( mbedtls_x509write_csr *ctx, mbedtls_pk_context *key )
switches 0:5c4d7b2438d3 70 {
switches 0:5c4d7b2438d3 71 ctx->key = key;
switches 0:5c4d7b2438d3 72 }
switches 0:5c4d7b2438d3 73
switches 0:5c4d7b2438d3 74 int mbedtls_x509write_csr_set_subject_name( mbedtls_x509write_csr *ctx,
switches 0:5c4d7b2438d3 75 const char *subject_name )
switches 0:5c4d7b2438d3 76 {
switches 0:5c4d7b2438d3 77 return mbedtls_x509_string_to_names( &ctx->subject, subject_name );
switches 0:5c4d7b2438d3 78 }
switches 0:5c4d7b2438d3 79
switches 0:5c4d7b2438d3 80 int mbedtls_x509write_csr_set_extension( mbedtls_x509write_csr *ctx,
switches 0:5c4d7b2438d3 81 const char *oid, size_t oid_len,
switches 0:5c4d7b2438d3 82 const unsigned char *val, size_t val_len )
switches 0:5c4d7b2438d3 83 {
switches 0:5c4d7b2438d3 84 return mbedtls_x509_set_extension( &ctx->extensions, oid, oid_len,
switches 0:5c4d7b2438d3 85 0, val, val_len );
switches 0:5c4d7b2438d3 86 }
switches 0:5c4d7b2438d3 87
switches 0:5c4d7b2438d3 88 int mbedtls_x509write_csr_set_key_usage( mbedtls_x509write_csr *ctx, unsigned char key_usage )
switches 0:5c4d7b2438d3 89 {
switches 0:5c4d7b2438d3 90 unsigned char buf[4];
switches 0:5c4d7b2438d3 91 unsigned char *c;
switches 0:5c4d7b2438d3 92 int ret;
switches 0:5c4d7b2438d3 93
switches 0:5c4d7b2438d3 94 c = buf + 4;
switches 0:5c4d7b2438d3 95
switches 0:5c4d7b2438d3 96 if( ( ret = mbedtls_asn1_write_bitstring( &c, buf, &key_usage, 7 ) ) != 4 )
switches 0:5c4d7b2438d3 97 return( ret );
switches 0:5c4d7b2438d3 98
switches 0:5c4d7b2438d3 99 ret = mbedtls_x509write_csr_set_extension( ctx, MBEDTLS_OID_KEY_USAGE,
switches 0:5c4d7b2438d3 100 MBEDTLS_OID_SIZE( MBEDTLS_OID_KEY_USAGE ),
switches 0:5c4d7b2438d3 101 buf, 4 );
switches 0:5c4d7b2438d3 102 if( ret != 0 )
switches 0:5c4d7b2438d3 103 return( ret );
switches 0:5c4d7b2438d3 104
switches 0:5c4d7b2438d3 105 return( 0 );
switches 0:5c4d7b2438d3 106 }
switches 0:5c4d7b2438d3 107
switches 0:5c4d7b2438d3 108 int mbedtls_x509write_csr_set_ns_cert_type( mbedtls_x509write_csr *ctx,
switches 0:5c4d7b2438d3 109 unsigned char ns_cert_type )
switches 0:5c4d7b2438d3 110 {
switches 0:5c4d7b2438d3 111 unsigned char buf[4];
switches 0:5c4d7b2438d3 112 unsigned char *c;
switches 0:5c4d7b2438d3 113 int ret;
switches 0:5c4d7b2438d3 114
switches 0:5c4d7b2438d3 115 c = buf + 4;
switches 0:5c4d7b2438d3 116
switches 0:5c4d7b2438d3 117 if( ( ret = mbedtls_asn1_write_bitstring( &c, buf, &ns_cert_type, 8 ) ) != 4 )
switches 0:5c4d7b2438d3 118 return( ret );
switches 0:5c4d7b2438d3 119
switches 0:5c4d7b2438d3 120 ret = mbedtls_x509write_csr_set_extension( ctx, MBEDTLS_OID_NS_CERT_TYPE,
switches 0:5c4d7b2438d3 121 MBEDTLS_OID_SIZE( MBEDTLS_OID_NS_CERT_TYPE ),
switches 0:5c4d7b2438d3 122 buf, 4 );
switches 0:5c4d7b2438d3 123 if( ret != 0 )
switches 0:5c4d7b2438d3 124 return( ret );
switches 0:5c4d7b2438d3 125
switches 0:5c4d7b2438d3 126 return( 0 );
switches 0:5c4d7b2438d3 127 }
switches 0:5c4d7b2438d3 128
switches 0:5c4d7b2438d3 129 int mbedtls_x509write_csr_der( mbedtls_x509write_csr *ctx, unsigned char *buf, size_t size,
switches 0:5c4d7b2438d3 130 int (*f_rng)(void *, unsigned char *, size_t),
switches 0:5c4d7b2438d3 131 void *p_rng )
switches 0:5c4d7b2438d3 132 {
switches 0:5c4d7b2438d3 133 int ret;
switches 0:5c4d7b2438d3 134 const char *sig_oid;
switches 0:5c4d7b2438d3 135 size_t sig_oid_len = 0;
switches 0:5c4d7b2438d3 136 unsigned char *c, *c2;
switches 0:5c4d7b2438d3 137 unsigned char hash[64];
switches 0:5c4d7b2438d3 138 unsigned char sig[MBEDTLS_MPI_MAX_SIZE];
switches 0:5c4d7b2438d3 139 unsigned char tmp_buf[2048];
switches 0:5c4d7b2438d3 140 size_t pub_len = 0, sig_and_oid_len = 0, sig_len;
switches 0:5c4d7b2438d3 141 size_t len = 0;
switches 0:5c4d7b2438d3 142 mbedtls_pk_type_t pk_alg;
switches 0:5c4d7b2438d3 143
switches 0:5c4d7b2438d3 144 /*
switches 0:5c4d7b2438d3 145 * Prepare data to be signed in tmp_buf
switches 0:5c4d7b2438d3 146 */
switches 0:5c4d7b2438d3 147 c = tmp_buf + sizeof( tmp_buf );
switches 0:5c4d7b2438d3 148
switches 0:5c4d7b2438d3 149 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_x509_write_extensions( &c, tmp_buf, ctx->extensions ) );
switches 0:5c4d7b2438d3 150
switches 0:5c4d7b2438d3 151 if( len )
switches 0:5c4d7b2438d3 152 {
switches 0:5c4d7b2438d3 153 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) );
switches 0:5c4d7b2438d3 154 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED |
switches 0:5c4d7b2438d3 155 MBEDTLS_ASN1_SEQUENCE ) );
switches 0:5c4d7b2438d3 156
switches 0:5c4d7b2438d3 157 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) );
switches 0:5c4d7b2438d3 158 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED |
switches 0:5c4d7b2438d3 159 MBEDTLS_ASN1_SET ) );
switches 0:5c4d7b2438d3 160
switches 0:5c4d7b2438d3 161 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_oid( &c, tmp_buf, MBEDTLS_OID_PKCS9_CSR_EXT_REQ,
switches 0:5c4d7b2438d3 162 MBEDTLS_OID_SIZE( MBEDTLS_OID_PKCS9_CSR_EXT_REQ ) ) );
switches 0:5c4d7b2438d3 163
switches 0:5c4d7b2438d3 164 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) );
switches 0:5c4d7b2438d3 165 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED |
switches 0:5c4d7b2438d3 166 MBEDTLS_ASN1_SEQUENCE ) );
switches 0:5c4d7b2438d3 167 }
switches 0:5c4d7b2438d3 168
switches 0:5c4d7b2438d3 169 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) );
switches 0:5c4d7b2438d3 170 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED |
switches 0:5c4d7b2438d3 171 MBEDTLS_ASN1_CONTEXT_SPECIFIC ) );
switches 0:5c4d7b2438d3 172
switches 0:5c4d7b2438d3 173 MBEDTLS_ASN1_CHK_ADD( pub_len, mbedtls_pk_write_pubkey_der( ctx->key,
switches 0:5c4d7b2438d3 174 tmp_buf, c - tmp_buf ) );
switches 0:5c4d7b2438d3 175 c -= pub_len;
switches 0:5c4d7b2438d3 176 len += pub_len;
switches 0:5c4d7b2438d3 177
switches 0:5c4d7b2438d3 178 /*
switches 0:5c4d7b2438d3 179 * Subject ::= Name
switches 0:5c4d7b2438d3 180 */
switches 0:5c4d7b2438d3 181 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_x509_write_names( &c, tmp_buf, ctx->subject ) );
switches 0:5c4d7b2438d3 182
switches 0:5c4d7b2438d3 183 /*
switches 0:5c4d7b2438d3 184 * Version ::= INTEGER { v1(0), v2(1), v3(2) }
switches 0:5c4d7b2438d3 185 */
switches 0:5c4d7b2438d3 186 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_int( &c, tmp_buf, 0 ) );
switches 0:5c4d7b2438d3 187
switches 0:5c4d7b2438d3 188 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) );
switches 0:5c4d7b2438d3 189 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED |
switches 0:5c4d7b2438d3 190 MBEDTLS_ASN1_SEQUENCE ) );
switches 0:5c4d7b2438d3 191
switches 0:5c4d7b2438d3 192 /*
switches 0:5c4d7b2438d3 193 * Prepare signature
switches 0:5c4d7b2438d3 194 */
switches 0:5c4d7b2438d3 195 mbedtls_md( mbedtls_md_info_from_type( ctx->md_alg ), c, len, hash );
switches 0:5c4d7b2438d3 196
switches 0:5c4d7b2438d3 197 pk_alg = mbedtls_pk_get_type( ctx->key );
switches 0:5c4d7b2438d3 198 if( pk_alg == MBEDTLS_PK_ECKEY )
switches 0:5c4d7b2438d3 199 pk_alg = MBEDTLS_PK_ECDSA;
switches 0:5c4d7b2438d3 200
switches 0:5c4d7b2438d3 201 if( ( ret = mbedtls_pk_sign( ctx->key, ctx->md_alg, hash, 0, sig, &sig_len,
switches 0:5c4d7b2438d3 202 f_rng, p_rng ) ) != 0 ||
switches 0:5c4d7b2438d3 203 ( ret = mbedtls_oid_get_oid_by_sig_alg( pk_alg, ctx->md_alg,
switches 0:5c4d7b2438d3 204 &sig_oid, &sig_oid_len ) ) != 0 )
switches 0:5c4d7b2438d3 205 {
switches 0:5c4d7b2438d3 206 return( ret );
switches 0:5c4d7b2438d3 207 }
switches 0:5c4d7b2438d3 208
switches 0:5c4d7b2438d3 209 /*
switches 0:5c4d7b2438d3 210 * Write data to output buffer
switches 0:5c4d7b2438d3 211 */
switches 0:5c4d7b2438d3 212 c2 = buf + size;
switches 0:5c4d7b2438d3 213 MBEDTLS_ASN1_CHK_ADD( sig_and_oid_len, mbedtls_x509_write_sig( &c2, buf,
switches 0:5c4d7b2438d3 214 sig_oid, sig_oid_len, sig, sig_len ) );
switches 0:5c4d7b2438d3 215
switches 0:5c4d7b2438d3 216 if( len > (size_t)( c2 - buf ) )
switches 0:5c4d7b2438d3 217 return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
switches 0:5c4d7b2438d3 218
switches 0:5c4d7b2438d3 219 c2 -= len;
switches 0:5c4d7b2438d3 220 memcpy( c2, c, len );
switches 0:5c4d7b2438d3 221
switches 0:5c4d7b2438d3 222 len += sig_and_oid_len;
switches 0:5c4d7b2438d3 223 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c2, buf, len ) );
switches 0:5c4d7b2438d3 224 MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c2, buf, MBEDTLS_ASN1_CONSTRUCTED |
switches 0:5c4d7b2438d3 225 MBEDTLS_ASN1_SEQUENCE ) );
switches 0:5c4d7b2438d3 226
switches 0:5c4d7b2438d3 227 return( (int) len );
switches 0:5c4d7b2438d3 228 }
switches 0:5c4d7b2438d3 229
switches 0:5c4d7b2438d3 230 #define PEM_BEGIN_CSR "-----BEGIN CERTIFICATE REQUEST-----\n"
switches 0:5c4d7b2438d3 231 #define PEM_END_CSR "-----END CERTIFICATE REQUEST-----\n"
switches 0:5c4d7b2438d3 232
switches 0:5c4d7b2438d3 233 #if defined(MBEDTLS_PEM_WRITE_C)
switches 0:5c4d7b2438d3 234 int mbedtls_x509write_csr_pem( mbedtls_x509write_csr *ctx, unsigned char *buf, size_t size,
switches 0:5c4d7b2438d3 235 int (*f_rng)(void *, unsigned char *, size_t),
switches 0:5c4d7b2438d3 236 void *p_rng )
switches 0:5c4d7b2438d3 237 {
switches 0:5c4d7b2438d3 238 int ret;
switches 0:5c4d7b2438d3 239 unsigned char output_buf[4096];
switches 0:5c4d7b2438d3 240 size_t olen = 0;
switches 0:5c4d7b2438d3 241
switches 0:5c4d7b2438d3 242 if( ( ret = mbedtls_x509write_csr_der( ctx, output_buf, sizeof(output_buf),
switches 0:5c4d7b2438d3 243 f_rng, p_rng ) ) < 0 )
switches 0:5c4d7b2438d3 244 {
switches 0:5c4d7b2438d3 245 return( ret );
switches 0:5c4d7b2438d3 246 }
switches 0:5c4d7b2438d3 247
switches 0:5c4d7b2438d3 248 if( ( ret = mbedtls_pem_write_buffer( PEM_BEGIN_CSR, PEM_END_CSR,
switches 0:5c4d7b2438d3 249 output_buf + sizeof(output_buf) - ret,
switches 0:5c4d7b2438d3 250 ret, buf, size, &olen ) ) != 0 )
switches 0:5c4d7b2438d3 251 {
switches 0:5c4d7b2438d3 252 return( ret );
switches 0:5c4d7b2438d3 253 }
switches 0:5c4d7b2438d3 254
switches 0:5c4d7b2438d3 255 return( 0 );
switches 0:5c4d7b2438d3 256 }
switches 0:5c4d7b2438d3 257 #endif /* MBEDTLS_PEM_WRITE_C */
switches 0:5c4d7b2438d3 258
switches 0:5c4d7b2438d3 259 #endif /* MBEDTLS_X509_CSR_WRITE_C */