Kev Mann / mbed-dev-OS5_10_4

features/mbedtls/src/pk.c@0:38ceb79fef03, 2018-11-28 (annotated)

Committer:
kevman
Date:
Wed Nov 28 15:10:15 2018 +0000
Revision:
0:38ceb79fef03
RTC modified

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kevman 0:38ceb79fef03 1 /*
kevman 0:38ceb79fef03 2 * Public Key abstraction layer
kevman 0:38ceb79fef03 3 *
kevman 0:38ceb79fef03 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
kevman 0:38ceb79fef03 5 * SPDX-License-Identifier: Apache-2.0
kevman 0:38ceb79fef03 6 *
kevman 0:38ceb79fef03 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
kevman 0:38ceb79fef03 8 * not use this file except in compliance with the License.
kevman 0:38ceb79fef03 9 * You may obtain a copy of the License at
kevman 0:38ceb79fef03 10 *
kevman 0:38ceb79fef03 11 * http://www.apache.org/licenses/LICENSE-2.0
kevman 0:38ceb79fef03 12 *
kevman 0:38ceb79fef03 13 * Unless required by applicable law or agreed to in writing, software
kevman 0:38ceb79fef03 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
kevman 0:38ceb79fef03 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kevman 0:38ceb79fef03 16 * See the License for the specific language governing permissions and
kevman 0:38ceb79fef03 17 * limitations under the License.
kevman 0:38ceb79fef03 18 *
kevman 0:38ceb79fef03 19 * This file is part of mbed TLS (https://tls.mbed.org)
kevman 0:38ceb79fef03 20 */
kevman 0:38ceb79fef03 21
kevman 0:38ceb79fef03 22 #if !defined(MBEDTLS_CONFIG_FILE)
kevman 0:38ceb79fef03 23 #include "mbedtls/config.h"
kevman 0:38ceb79fef03 24 #else
kevman 0:38ceb79fef03 25 #include MBEDTLS_CONFIG_FILE
kevman 0:38ceb79fef03 26 #endif
kevman 0:38ceb79fef03 27
kevman 0:38ceb79fef03 28 #if defined(MBEDTLS_PK_C)
kevman 0:38ceb79fef03 29 #include "mbedtls/pk.h"
kevman 0:38ceb79fef03 30 #include "mbedtls/pk_internal.h"
kevman 0:38ceb79fef03 31
kevman 0:38ceb79fef03 32 #include "mbedtls/platform_util.h"
kevman 0:38ceb79fef03 33
kevman 0:38ceb79fef03 34 #if defined(MBEDTLS_RSA_C)
kevman 0:38ceb79fef03 35 #include "mbedtls/rsa.h"
kevman 0:38ceb79fef03 36 #endif
kevman 0:38ceb79fef03 37 #if defined(MBEDTLS_ECP_C)
kevman 0:38ceb79fef03 38 #include "mbedtls/ecp.h"
kevman 0:38ceb79fef03 39 #endif
kevman 0:38ceb79fef03 40 #if defined(MBEDTLS_ECDSA_C)
kevman 0:38ceb79fef03 41 #include "mbedtls/ecdsa.h"
kevman 0:38ceb79fef03 42 #endif
kevman 0:38ceb79fef03 43
kevman 0:38ceb79fef03 44 #include <limits.h>
kevman 0:38ceb79fef03 45 #include <stdint.h>
kevman 0:38ceb79fef03 46
kevman 0:38ceb79fef03 47 /*
kevman 0:38ceb79fef03 48 * Initialise a mbedtls_pk_context
kevman 0:38ceb79fef03 49 */
kevman 0:38ceb79fef03 50 void mbedtls_pk_init( mbedtls_pk_context *ctx )
kevman 0:38ceb79fef03 51 {
kevman 0:38ceb79fef03 52 if( ctx == NULL )
kevman 0:38ceb79fef03 53 return;
kevman 0:38ceb79fef03 54
kevman 0:38ceb79fef03 55 ctx->pk_info = NULL;
kevman 0:38ceb79fef03 56 ctx->pk_ctx = NULL;
kevman 0:38ceb79fef03 57 }
kevman 0:38ceb79fef03 58
kevman 0:38ceb79fef03 59 /*
kevman 0:38ceb79fef03 60 * Free (the components of) a mbedtls_pk_context
kevman 0:38ceb79fef03 61 */
kevman 0:38ceb79fef03 62 void mbedtls_pk_free( mbedtls_pk_context *ctx )
kevman 0:38ceb79fef03 63 {
kevman 0:38ceb79fef03 64 if( ctx == NULL || ctx->pk_info == NULL )
kevman 0:38ceb79fef03 65 return;
kevman 0:38ceb79fef03 66
kevman 0:38ceb79fef03 67 ctx->pk_info->ctx_free_func( ctx->pk_ctx );
kevman 0:38ceb79fef03 68
kevman 0:38ceb79fef03 69 mbedtls_platform_zeroize( ctx, sizeof( mbedtls_pk_context ) );
kevman 0:38ceb79fef03 70 }
kevman 0:38ceb79fef03 71
kevman 0:38ceb79fef03 72 /*
kevman 0:38ceb79fef03 73 * Get pk_info structure from type
kevman 0:38ceb79fef03 74 */
kevman 0:38ceb79fef03 75 const mbedtls_pk_info_t * mbedtls_pk_info_from_type( mbedtls_pk_type_t pk_type )
kevman 0:38ceb79fef03 76 {
kevman 0:38ceb79fef03 77 switch( pk_type ) {
kevman 0:38ceb79fef03 78 #if defined(MBEDTLS_RSA_C)
kevman 0:38ceb79fef03 79 case MBEDTLS_PK_RSA:
kevman 0:38ceb79fef03 80 return( &mbedtls_rsa_info );
kevman 0:38ceb79fef03 81 #endif
kevman 0:38ceb79fef03 82 #if defined(MBEDTLS_ECP_C)
kevman 0:38ceb79fef03 83 case MBEDTLS_PK_ECKEY:
kevman 0:38ceb79fef03 84 return( &mbedtls_eckey_info );
kevman 0:38ceb79fef03 85 case MBEDTLS_PK_ECKEY_DH:
kevman 0:38ceb79fef03 86 return( &mbedtls_eckeydh_info );
kevman 0:38ceb79fef03 87 #endif
kevman 0:38ceb79fef03 88 #if defined(MBEDTLS_ECDSA_C)
kevman 0:38ceb79fef03 89 case MBEDTLS_PK_ECDSA:
kevman 0:38ceb79fef03 90 return( &mbedtls_ecdsa_info );
kevman 0:38ceb79fef03 91 #endif
kevman 0:38ceb79fef03 92 /* MBEDTLS_PK_RSA_ALT omitted on purpose */
kevman 0:38ceb79fef03 93 default:
kevman 0:38ceb79fef03 94 return( NULL );
kevman 0:38ceb79fef03 95 }
kevman 0:38ceb79fef03 96 }
kevman 0:38ceb79fef03 97
kevman 0:38ceb79fef03 98 /*
kevman 0:38ceb79fef03 99 * Initialise context
kevman 0:38ceb79fef03 100 */
kevman 0:38ceb79fef03 101 int mbedtls_pk_setup( mbedtls_pk_context *ctx, const mbedtls_pk_info_t *info )
kevman 0:38ceb79fef03 102 {
kevman 0:38ceb79fef03 103 if( ctx == NULL || info == NULL || ctx->pk_info != NULL )
kevman 0:38ceb79fef03 104 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 105
kevman 0:38ceb79fef03 106 if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
kevman 0:38ceb79fef03 107 return( MBEDTLS_ERR_PK_ALLOC_FAILED );
kevman 0:38ceb79fef03 108
kevman 0:38ceb79fef03 109 ctx->pk_info = info;
kevman 0:38ceb79fef03 110
kevman 0:38ceb79fef03 111 return( 0 );
kevman 0:38ceb79fef03 112 }
kevman 0:38ceb79fef03 113
kevman 0:38ceb79fef03 114 #if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
kevman 0:38ceb79fef03 115 /*
kevman 0:38ceb79fef03 116 * Initialize an RSA-alt context
kevman 0:38ceb79fef03 117 */
kevman 0:38ceb79fef03 118 int mbedtls_pk_setup_rsa_alt( mbedtls_pk_context *ctx, void * key,
kevman 0:38ceb79fef03 119 mbedtls_pk_rsa_alt_decrypt_func decrypt_func,
kevman 0:38ceb79fef03 120 mbedtls_pk_rsa_alt_sign_func sign_func,
kevman 0:38ceb79fef03 121 mbedtls_pk_rsa_alt_key_len_func key_len_func )
kevman 0:38ceb79fef03 122 {
kevman 0:38ceb79fef03 123 mbedtls_rsa_alt_context *rsa_alt;
kevman 0:38ceb79fef03 124 const mbedtls_pk_info_t *info = &mbedtls_rsa_alt_info;
kevman 0:38ceb79fef03 125
kevman 0:38ceb79fef03 126 if( ctx == NULL || ctx->pk_info != NULL )
kevman 0:38ceb79fef03 127 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 128
kevman 0:38ceb79fef03 129 if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
kevman 0:38ceb79fef03 130 return( MBEDTLS_ERR_PK_ALLOC_FAILED );
kevman 0:38ceb79fef03 131
kevman 0:38ceb79fef03 132 ctx->pk_info = info;
kevman 0:38ceb79fef03 133
kevman 0:38ceb79fef03 134 rsa_alt = (mbedtls_rsa_alt_context *) ctx->pk_ctx;
kevman 0:38ceb79fef03 135
kevman 0:38ceb79fef03 136 rsa_alt->key = key;
kevman 0:38ceb79fef03 137 rsa_alt->decrypt_func = decrypt_func;
kevman 0:38ceb79fef03 138 rsa_alt->sign_func = sign_func;
kevman 0:38ceb79fef03 139 rsa_alt->key_len_func = key_len_func;
kevman 0:38ceb79fef03 140
kevman 0:38ceb79fef03 141 return( 0 );
kevman 0:38ceb79fef03 142 }
kevman 0:38ceb79fef03 143 #endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
kevman 0:38ceb79fef03 144
kevman 0:38ceb79fef03 145 /*
kevman 0:38ceb79fef03 146 * Tell if a PK can do the operations of the given type
kevman 0:38ceb79fef03 147 */
kevman 0:38ceb79fef03 148 int mbedtls_pk_can_do( const mbedtls_pk_context *ctx, mbedtls_pk_type_t type )
kevman 0:38ceb79fef03 149 {
kevman 0:38ceb79fef03 150 /* null or NONE context can't do anything */
kevman 0:38ceb79fef03 151 if( ctx == NULL || ctx->pk_info == NULL )
kevman 0:38ceb79fef03 152 return( 0 );
kevman 0:38ceb79fef03 153
kevman 0:38ceb79fef03 154 return( ctx->pk_info->can_do( type ) );
kevman 0:38ceb79fef03 155 }
kevman 0:38ceb79fef03 156
kevman 0:38ceb79fef03 157 /*
kevman 0:38ceb79fef03 158 * Helper for mbedtls_pk_sign and mbedtls_pk_verify
kevman 0:38ceb79fef03 159 */
kevman 0:38ceb79fef03 160 static inline int pk_hashlen_helper( mbedtls_md_type_t md_alg, size_t *hash_len )
kevman 0:38ceb79fef03 161 {
kevman 0:38ceb79fef03 162 const mbedtls_md_info_t *md_info;
kevman 0:38ceb79fef03 163
kevman 0:38ceb79fef03 164 if( *hash_len != 0 )
kevman 0:38ceb79fef03 165 return( 0 );
kevman 0:38ceb79fef03 166
kevman 0:38ceb79fef03 167 if( ( md_info = mbedtls_md_info_from_type( md_alg ) ) == NULL )
kevman 0:38ceb79fef03 168 return( -1 );
kevman 0:38ceb79fef03 169
kevman 0:38ceb79fef03 170 *hash_len = mbedtls_md_get_size( md_info );
kevman 0:38ceb79fef03 171 return( 0 );
kevman 0:38ceb79fef03 172 }
kevman 0:38ceb79fef03 173
kevman 0:38ceb79fef03 174 /*
kevman 0:38ceb79fef03 175 * Verify a signature
kevman 0:38ceb79fef03 176 */
kevman 0:38ceb79fef03 177 int mbedtls_pk_verify( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
kevman 0:38ceb79fef03 178 const unsigned char *hash, size_t hash_len,
kevman 0:38ceb79fef03 179 const unsigned char *sig, size_t sig_len )
kevman 0:38ceb79fef03 180 {
kevman 0:38ceb79fef03 181 if( ctx == NULL || ctx->pk_info == NULL ||
kevman 0:38ceb79fef03 182 pk_hashlen_helper( md_alg, &hash_len ) != 0 )
kevman 0:38ceb79fef03 183 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 184
kevman 0:38ceb79fef03 185 if( ctx->pk_info->verify_func == NULL )
kevman 0:38ceb79fef03 186 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
kevman 0:38ceb79fef03 187
kevman 0:38ceb79fef03 188 return( ctx->pk_info->verify_func( ctx->pk_ctx, md_alg, hash, hash_len,
kevman 0:38ceb79fef03 189 sig, sig_len ) );
kevman 0:38ceb79fef03 190 }
kevman 0:38ceb79fef03 191
kevman 0:38ceb79fef03 192 /*
kevman 0:38ceb79fef03 193 * Verify a signature with options
kevman 0:38ceb79fef03 194 */
kevman 0:38ceb79fef03 195 int mbedtls_pk_verify_ext( mbedtls_pk_type_t type, const void *options,
kevman 0:38ceb79fef03 196 mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
kevman 0:38ceb79fef03 197 const unsigned char *hash, size_t hash_len,
kevman 0:38ceb79fef03 198 const unsigned char *sig, size_t sig_len )
kevman 0:38ceb79fef03 199 {
kevman 0:38ceb79fef03 200 if( ctx == NULL || ctx->pk_info == NULL )
kevman 0:38ceb79fef03 201 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 202
kevman 0:38ceb79fef03 203 if( ! mbedtls_pk_can_do( ctx, type ) )
kevman 0:38ceb79fef03 204 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
kevman 0:38ceb79fef03 205
kevman 0:38ceb79fef03 206 if( type == MBEDTLS_PK_RSASSA_PSS )
kevman 0:38ceb79fef03 207 {
kevman 0:38ceb79fef03 208 #if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PKCS1_V21)
kevman 0:38ceb79fef03 209 int ret;
kevman 0:38ceb79fef03 210 const mbedtls_pk_rsassa_pss_options *pss_opts;
kevman 0:38ceb79fef03 211
kevman 0:38ceb79fef03 212 #if SIZE_MAX > UINT_MAX
kevman 0:38ceb79fef03 213 if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
kevman 0:38ceb79fef03 214 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 215 #endif /* SIZE_MAX > UINT_MAX */
kevman 0:38ceb79fef03 216
kevman 0:38ceb79fef03 217 if( options == NULL )
kevman 0:38ceb79fef03 218 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 219
kevman 0:38ceb79fef03 220 pss_opts = (const mbedtls_pk_rsassa_pss_options *) options;
kevman 0:38ceb79fef03 221
kevman 0:38ceb79fef03 222 if( sig_len < mbedtls_pk_get_len( ctx ) )
kevman 0:38ceb79fef03 223 return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
kevman 0:38ceb79fef03 224
kevman 0:38ceb79fef03 225 ret = mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_pk_rsa( *ctx ),
kevman 0:38ceb79fef03 226 NULL, NULL, MBEDTLS_RSA_PUBLIC,
kevman 0:38ceb79fef03 227 md_alg, (unsigned int) hash_len, hash,
kevman 0:38ceb79fef03 228 pss_opts->mgf1_hash_id,
kevman 0:38ceb79fef03 229 pss_opts->expected_salt_len,
kevman 0:38ceb79fef03 230 sig );
kevman 0:38ceb79fef03 231 if( ret != 0 )
kevman 0:38ceb79fef03 232 return( ret );
kevman 0:38ceb79fef03 233
kevman 0:38ceb79fef03 234 if( sig_len > mbedtls_pk_get_len( ctx ) )
kevman 0:38ceb79fef03 235 return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH );
kevman 0:38ceb79fef03 236
kevman 0:38ceb79fef03 237 return( 0 );
kevman 0:38ceb79fef03 238 #else
kevman 0:38ceb79fef03 239 return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
kevman 0:38ceb79fef03 240 #endif /* MBEDTLS_RSA_C && MBEDTLS_PKCS1_V21 */
kevman 0:38ceb79fef03 241 }
kevman 0:38ceb79fef03 242
kevman 0:38ceb79fef03 243 /* General case: no options */
kevman 0:38ceb79fef03 244 if( options != NULL )
kevman 0:38ceb79fef03 245 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 246
kevman 0:38ceb79fef03 247 return( mbedtls_pk_verify( ctx, md_alg, hash, hash_len, sig, sig_len ) );
kevman 0:38ceb79fef03 248 }
kevman 0:38ceb79fef03 249
kevman 0:38ceb79fef03 250 /*
kevman 0:38ceb79fef03 251 * Make a signature
kevman 0:38ceb79fef03 252 */
kevman 0:38ceb79fef03 253 int mbedtls_pk_sign( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
kevman 0:38ceb79fef03 254 const unsigned char *hash, size_t hash_len,
kevman 0:38ceb79fef03 255 unsigned char *sig, size_t *sig_len,
kevman 0:38ceb79fef03 256 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
kevman 0:38ceb79fef03 257 {
kevman 0:38ceb79fef03 258 if( ctx == NULL || ctx->pk_info == NULL ||
kevman 0:38ceb79fef03 259 pk_hashlen_helper( md_alg, &hash_len ) != 0 )
kevman 0:38ceb79fef03 260 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 261
kevman 0:38ceb79fef03 262 if( ctx->pk_info->sign_func == NULL )
kevman 0:38ceb79fef03 263 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
kevman 0:38ceb79fef03 264
kevman 0:38ceb79fef03 265 return( ctx->pk_info->sign_func( ctx->pk_ctx, md_alg, hash, hash_len,
kevman 0:38ceb79fef03 266 sig, sig_len, f_rng, p_rng ) );
kevman 0:38ceb79fef03 267 }
kevman 0:38ceb79fef03 268
kevman 0:38ceb79fef03 269 /*
kevman 0:38ceb79fef03 270 * Decrypt message
kevman 0:38ceb79fef03 271 */
kevman 0:38ceb79fef03 272 int mbedtls_pk_decrypt( mbedtls_pk_context *ctx,
kevman 0:38ceb79fef03 273 const unsigned char *input, size_t ilen,
kevman 0:38ceb79fef03 274 unsigned char *output, size_t *olen, size_t osize,
kevman 0:38ceb79fef03 275 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
kevman 0:38ceb79fef03 276 {
kevman 0:38ceb79fef03 277 if( ctx == NULL || ctx->pk_info == NULL )
kevman 0:38ceb79fef03 278 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 279
kevman 0:38ceb79fef03 280 if( ctx->pk_info->decrypt_func == NULL )
kevman 0:38ceb79fef03 281 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
kevman 0:38ceb79fef03 282
kevman 0:38ceb79fef03 283 return( ctx->pk_info->decrypt_func( ctx->pk_ctx, input, ilen,
kevman 0:38ceb79fef03 284 output, olen, osize, f_rng, p_rng ) );
kevman 0:38ceb79fef03 285 }
kevman 0:38ceb79fef03 286
kevman 0:38ceb79fef03 287 /*
kevman 0:38ceb79fef03 288 * Encrypt message
kevman 0:38ceb79fef03 289 */
kevman 0:38ceb79fef03 290 int mbedtls_pk_encrypt( mbedtls_pk_context *ctx,
kevman 0:38ceb79fef03 291 const unsigned char *input, size_t ilen,
kevman 0:38ceb79fef03 292 unsigned char *output, size_t *olen, size_t osize,
kevman 0:38ceb79fef03 293 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
kevman 0:38ceb79fef03 294 {
kevman 0:38ceb79fef03 295 if( ctx == NULL || ctx->pk_info == NULL )
kevman 0:38ceb79fef03 296 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 297
kevman 0:38ceb79fef03 298 if( ctx->pk_info->encrypt_func == NULL )
kevman 0:38ceb79fef03 299 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
kevman 0:38ceb79fef03 300
kevman 0:38ceb79fef03 301 return( ctx->pk_info->encrypt_func( ctx->pk_ctx, input, ilen,
kevman 0:38ceb79fef03 302 output, olen, osize, f_rng, p_rng ) );
kevman 0:38ceb79fef03 303 }
kevman 0:38ceb79fef03 304
kevman 0:38ceb79fef03 305 /*
kevman 0:38ceb79fef03 306 * Check public-private key pair
kevman 0:38ceb79fef03 307 */
kevman 0:38ceb79fef03 308 int mbedtls_pk_check_pair( const mbedtls_pk_context *pub, const mbedtls_pk_context *prv )
kevman 0:38ceb79fef03 309 {
kevman 0:38ceb79fef03 310 if( pub == NULL || pub->pk_info == NULL ||
kevman 0:38ceb79fef03 311 prv == NULL || prv->pk_info == NULL ||
kevman 0:38ceb79fef03 312 prv->pk_info->check_pair_func == NULL )
kevman 0:38ceb79fef03 313 {
kevman 0:38ceb79fef03 314 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 315 }
kevman 0:38ceb79fef03 316
kevman 0:38ceb79fef03 317 if( prv->pk_info->type == MBEDTLS_PK_RSA_ALT )
kevman 0:38ceb79fef03 318 {
kevman 0:38ceb79fef03 319 if( pub->pk_info->type != MBEDTLS_PK_RSA )
kevman 0:38ceb79fef03 320 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
kevman 0:38ceb79fef03 321 }
kevman 0:38ceb79fef03 322 else
kevman 0:38ceb79fef03 323 {
kevman 0:38ceb79fef03 324 if( pub->pk_info != prv->pk_info )
kevman 0:38ceb79fef03 325 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
kevman 0:38ceb79fef03 326 }
kevman 0:38ceb79fef03 327
kevman 0:38ceb79fef03 328 return( prv->pk_info->check_pair_func( pub->pk_ctx, prv->pk_ctx ) );
kevman 0:38ceb79fef03 329 }
kevman 0:38ceb79fef03 330
kevman 0:38ceb79fef03 331 /*
kevman 0:38ceb79fef03 332 * Get key size in bits
kevman 0:38ceb79fef03 333 */
kevman 0:38ceb79fef03 334 size_t mbedtls_pk_get_bitlen( const mbedtls_pk_context *ctx )
kevman 0:38ceb79fef03 335 {
kevman 0:38ceb79fef03 336 if( ctx == NULL || ctx->pk_info == NULL )
kevman 0:38ceb79fef03 337 return( 0 );
kevman 0:38ceb79fef03 338
kevman 0:38ceb79fef03 339 return( ctx->pk_info->get_bitlen( ctx->pk_ctx ) );
kevman 0:38ceb79fef03 340 }
kevman 0:38ceb79fef03 341
kevman 0:38ceb79fef03 342 /*
kevman 0:38ceb79fef03 343 * Export debug information
kevman 0:38ceb79fef03 344 */
kevman 0:38ceb79fef03 345 int mbedtls_pk_debug( const mbedtls_pk_context *ctx, mbedtls_pk_debug_item *items )
kevman 0:38ceb79fef03 346 {
kevman 0:38ceb79fef03 347 if( ctx == NULL || ctx->pk_info == NULL )
kevman 0:38ceb79fef03 348 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 349
kevman 0:38ceb79fef03 350 if( ctx->pk_info->debug_func == NULL )
kevman 0:38ceb79fef03 351 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
kevman 0:38ceb79fef03 352
kevman 0:38ceb79fef03 353 ctx->pk_info->debug_func( ctx->pk_ctx, items );
kevman 0:38ceb79fef03 354 return( 0 );
kevman 0:38ceb79fef03 355 }
kevman 0:38ceb79fef03 356
kevman 0:38ceb79fef03 357 /*
kevman 0:38ceb79fef03 358 * Access the PK type name
kevman 0:38ceb79fef03 359 */
kevman 0:38ceb79fef03 360 const char *mbedtls_pk_get_name( const mbedtls_pk_context *ctx )
kevman 0:38ceb79fef03 361 {
kevman 0:38ceb79fef03 362 if( ctx == NULL || ctx->pk_info == NULL )
kevman 0:38ceb79fef03 363 return( "invalid PK" );
kevman 0:38ceb79fef03 364
kevman 0:38ceb79fef03 365 return( ctx->pk_info->name );
kevman 0:38ceb79fef03 366 }
kevman 0:38ceb79fef03 367
kevman 0:38ceb79fef03 368 /*
kevman 0:38ceb79fef03 369 * Access the PK type
kevman 0:38ceb79fef03 370 */
kevman 0:38ceb79fef03 371 mbedtls_pk_type_t mbedtls_pk_get_type( const mbedtls_pk_context *ctx )
kevman 0:38ceb79fef03 372 {
kevman 0:38ceb79fef03 373 if( ctx == NULL || ctx->pk_info == NULL )
kevman 0:38ceb79fef03 374 return( MBEDTLS_PK_NONE );
kevman 0:38ceb79fef03 375
kevman 0:38ceb79fef03 376 return( ctx->pk_info->type );
kevman 0:38ceb79fef03 377 }
kevman 0:38ceb79fef03 378
kevman 0:38ceb79fef03 379 #endif /* MBEDTLS_PK_C */