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features/mbedtls/src/pk.c@0:6c56fb4bc5f0, 2016-11-04 (annotated)

Committer:
nexpaq
Date:
Fri Nov 04 20:27:58 2016 +0000
Revision:
0:6c56fb4bc5f0
Moving to library for sharing updates

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nexpaq 0:6c56fb4bc5f0 1 /*
nexpaq 0:6c56fb4bc5f0 2 * Public Key abstraction layer
nexpaq 0:6c56fb4bc5f0 3 *
nexpaq 0:6c56fb4bc5f0 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
nexpaq 0:6c56fb4bc5f0 5 * SPDX-License-Identifier: Apache-2.0
nexpaq 0:6c56fb4bc5f0 6 *
nexpaq 0:6c56fb4bc5f0 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
nexpaq 0:6c56fb4bc5f0 8 * not use this file except in compliance with the License.
nexpaq 0:6c56fb4bc5f0 9 * You may obtain a copy of the License at
nexpaq 0:6c56fb4bc5f0 10 *
nexpaq 0:6c56fb4bc5f0 11 * http://www.apache.org/licenses/LICENSE-2.0
nexpaq 0:6c56fb4bc5f0 12 *
nexpaq 0:6c56fb4bc5f0 13 * Unless required by applicable law or agreed to in writing, software
nexpaq 0:6c56fb4bc5f0 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
nexpaq 0:6c56fb4bc5f0 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
nexpaq 0:6c56fb4bc5f0 16 * See the License for the specific language governing permissions and
nexpaq 0:6c56fb4bc5f0 17 * limitations under the License.
nexpaq 0:6c56fb4bc5f0 18 *
nexpaq 0:6c56fb4bc5f0 19 * This file is part of mbed TLS (https://tls.mbed.org)
nexpaq 0:6c56fb4bc5f0 20 */
nexpaq 0:6c56fb4bc5f0 21
nexpaq 0:6c56fb4bc5f0 22 #if !defined(MBEDTLS_CONFIG_FILE)
nexpaq 0:6c56fb4bc5f0 23 #include "mbedtls/config.h"
nexpaq 0:6c56fb4bc5f0 24 #else
nexpaq 0:6c56fb4bc5f0 25 #include MBEDTLS_CONFIG_FILE
nexpaq 0:6c56fb4bc5f0 26 #endif
nexpaq 0:6c56fb4bc5f0 27
nexpaq 0:6c56fb4bc5f0 28 #if defined(MBEDTLS_PK_C)
nexpaq 0:6c56fb4bc5f0 29 #include "mbedtls/pk.h"
nexpaq 0:6c56fb4bc5f0 30 #include "mbedtls/pk_internal.h"
nexpaq 0:6c56fb4bc5f0 31
nexpaq 0:6c56fb4bc5f0 32 #if defined(MBEDTLS_RSA_C)
nexpaq 0:6c56fb4bc5f0 33 #include "mbedtls/rsa.h"
nexpaq 0:6c56fb4bc5f0 34 #endif
nexpaq 0:6c56fb4bc5f0 35 #if defined(MBEDTLS_ECP_C)
nexpaq 0:6c56fb4bc5f0 36 #include "mbedtls/ecp.h"
nexpaq 0:6c56fb4bc5f0 37 #endif
nexpaq 0:6c56fb4bc5f0 38 #if defined(MBEDTLS_ECDSA_C)
nexpaq 0:6c56fb4bc5f0 39 #include "mbedtls/ecdsa.h"
nexpaq 0:6c56fb4bc5f0 40 #endif
nexpaq 0:6c56fb4bc5f0 41
nexpaq 0:6c56fb4bc5f0 42 /* Implementation that should never be optimized out by the compiler */
nexpaq 0:6c56fb4bc5f0 43 static void mbedtls_zeroize( void *v, size_t n ) {
nexpaq 0:6c56fb4bc5f0 44 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
nexpaq 0:6c56fb4bc5f0 45 }
nexpaq 0:6c56fb4bc5f0 46
nexpaq 0:6c56fb4bc5f0 47 /*
nexpaq 0:6c56fb4bc5f0 48 * Initialise a mbedtls_pk_context
nexpaq 0:6c56fb4bc5f0 49 */
nexpaq 0:6c56fb4bc5f0 50 void mbedtls_pk_init( mbedtls_pk_context *ctx )
nexpaq 0:6c56fb4bc5f0 51 {
nexpaq 0:6c56fb4bc5f0 52 if( ctx == NULL )
nexpaq 0:6c56fb4bc5f0 53 return;
nexpaq 0:6c56fb4bc5f0 54
nexpaq 0:6c56fb4bc5f0 55 ctx->pk_info = NULL;
nexpaq 0:6c56fb4bc5f0 56 ctx->pk_ctx = NULL;
nexpaq 0:6c56fb4bc5f0 57 }
nexpaq 0:6c56fb4bc5f0 58
nexpaq 0:6c56fb4bc5f0 59 /*
nexpaq 0:6c56fb4bc5f0 60 * Free (the components of) a mbedtls_pk_context
nexpaq 0:6c56fb4bc5f0 61 */
nexpaq 0:6c56fb4bc5f0 62 void mbedtls_pk_free( mbedtls_pk_context *ctx )
nexpaq 0:6c56fb4bc5f0 63 {
nexpaq 0:6c56fb4bc5f0 64 if( ctx == NULL || ctx->pk_info == NULL )
nexpaq 0:6c56fb4bc5f0 65 return;
nexpaq 0:6c56fb4bc5f0 66
nexpaq 0:6c56fb4bc5f0 67 ctx->pk_info->ctx_free_func( ctx->pk_ctx );
nexpaq 0:6c56fb4bc5f0 68
nexpaq 0:6c56fb4bc5f0 69 mbedtls_zeroize( ctx, sizeof( mbedtls_pk_context ) );
nexpaq 0:6c56fb4bc5f0 70 }
nexpaq 0:6c56fb4bc5f0 71
nexpaq 0:6c56fb4bc5f0 72 /*
nexpaq 0:6c56fb4bc5f0 73 * Get pk_info structure from type
nexpaq 0:6c56fb4bc5f0 74 */
nexpaq 0:6c56fb4bc5f0 75 const mbedtls_pk_info_t * mbedtls_pk_info_from_type( mbedtls_pk_type_t pk_type )
nexpaq 0:6c56fb4bc5f0 76 {
nexpaq 0:6c56fb4bc5f0 77 switch( pk_type ) {
nexpaq 0:6c56fb4bc5f0 78 #if defined(MBEDTLS_RSA_C)
nexpaq 0:6c56fb4bc5f0 79 case MBEDTLS_PK_RSA:
nexpaq 0:6c56fb4bc5f0 80 return( &mbedtls_rsa_info );
nexpaq 0:6c56fb4bc5f0 81 #endif
nexpaq 0:6c56fb4bc5f0 82 #if defined(MBEDTLS_ECP_C)
nexpaq 0:6c56fb4bc5f0 83 case MBEDTLS_PK_ECKEY:
nexpaq 0:6c56fb4bc5f0 84 return( &mbedtls_eckey_info );
nexpaq 0:6c56fb4bc5f0 85 case MBEDTLS_PK_ECKEY_DH:
nexpaq 0:6c56fb4bc5f0 86 return( &mbedtls_eckeydh_info );
nexpaq 0:6c56fb4bc5f0 87 #endif
nexpaq 0:6c56fb4bc5f0 88 #if defined(MBEDTLS_ECDSA_C)
nexpaq 0:6c56fb4bc5f0 89 case MBEDTLS_PK_ECDSA:
nexpaq 0:6c56fb4bc5f0 90 return( &mbedtls_ecdsa_info );
nexpaq 0:6c56fb4bc5f0 91 #endif
nexpaq 0:6c56fb4bc5f0 92 /* MBEDTLS_PK_RSA_ALT omitted on purpose */
nexpaq 0:6c56fb4bc5f0 93 default:
nexpaq 0:6c56fb4bc5f0 94 return( NULL );
nexpaq 0:6c56fb4bc5f0 95 }
nexpaq 0:6c56fb4bc5f0 96 }
nexpaq 0:6c56fb4bc5f0 97
nexpaq 0:6c56fb4bc5f0 98 /*
nexpaq 0:6c56fb4bc5f0 99 * Initialise context
nexpaq 0:6c56fb4bc5f0 100 */
nexpaq 0:6c56fb4bc5f0 101 int mbedtls_pk_setup( mbedtls_pk_context *ctx, const mbedtls_pk_info_t *info )
nexpaq 0:6c56fb4bc5f0 102 {
nexpaq 0:6c56fb4bc5f0 103 if( ctx == NULL || info == NULL || ctx->pk_info != NULL )
nexpaq 0:6c56fb4bc5f0 104 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
nexpaq 0:6c56fb4bc5f0 105
nexpaq 0:6c56fb4bc5f0 106 if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
nexpaq 0:6c56fb4bc5f0 107 return( MBEDTLS_ERR_PK_ALLOC_FAILED );
nexpaq 0:6c56fb4bc5f0 108
nexpaq 0:6c56fb4bc5f0 109 ctx->pk_info = info;
nexpaq 0:6c56fb4bc5f0 110
nexpaq 0:6c56fb4bc5f0 111 return( 0 );
nexpaq 0:6c56fb4bc5f0 112 }
nexpaq 0:6c56fb4bc5f0 113
nexpaq 0:6c56fb4bc5f0 114 #if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
nexpaq 0:6c56fb4bc5f0 115 /*
nexpaq 0:6c56fb4bc5f0 116 * Initialize an RSA-alt context
nexpaq 0:6c56fb4bc5f0 117 */
nexpaq 0:6c56fb4bc5f0 118 int mbedtls_pk_setup_rsa_alt( mbedtls_pk_context *ctx, void * key,
nexpaq 0:6c56fb4bc5f0 119 mbedtls_pk_rsa_alt_decrypt_func decrypt_func,
nexpaq 0:6c56fb4bc5f0 120 mbedtls_pk_rsa_alt_sign_func sign_func,
nexpaq 0:6c56fb4bc5f0 121 mbedtls_pk_rsa_alt_key_len_func key_len_func )
nexpaq 0:6c56fb4bc5f0 122 {
nexpaq 0:6c56fb4bc5f0 123 mbedtls_rsa_alt_context *rsa_alt;
nexpaq 0:6c56fb4bc5f0 124 const mbedtls_pk_info_t *info = &mbedtls_rsa_alt_info;
nexpaq 0:6c56fb4bc5f0 125
nexpaq 0:6c56fb4bc5f0 126 if( ctx == NULL || ctx->pk_info != NULL )
nexpaq 0:6c56fb4bc5f0 127 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
nexpaq 0:6c56fb4bc5f0 128
nexpaq 0:6c56fb4bc5f0 129 if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
nexpaq 0:6c56fb4bc5f0 130 return( MBEDTLS_ERR_PK_ALLOC_FAILED );
nexpaq 0:6c56fb4bc5f0 131
nexpaq 0:6c56fb4bc5f0 132 ctx->pk_info = info;
nexpaq 0:6c56fb4bc5f0 133
nexpaq 0:6c56fb4bc5f0 134 rsa_alt = (mbedtls_rsa_alt_context *) ctx->pk_ctx;
nexpaq 0:6c56fb4bc5f0 135
nexpaq 0:6c56fb4bc5f0 136 rsa_alt->key = key;
nexpaq 0:6c56fb4bc5f0 137 rsa_alt->decrypt_func = decrypt_func;
nexpaq 0:6c56fb4bc5f0 138 rsa_alt->sign_func = sign_func;
nexpaq 0:6c56fb4bc5f0 139 rsa_alt->key_len_func = key_len_func;
nexpaq 0:6c56fb4bc5f0 140
nexpaq 0:6c56fb4bc5f0 141 return( 0 );
nexpaq 0:6c56fb4bc5f0 142 }
nexpaq 0:6c56fb4bc5f0 143 #endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
nexpaq 0:6c56fb4bc5f0 144
nexpaq 0:6c56fb4bc5f0 145 /*
nexpaq 0:6c56fb4bc5f0 146 * Tell if a PK can do the operations of the given type
nexpaq 0:6c56fb4bc5f0 147 */
nexpaq 0:6c56fb4bc5f0 148 int mbedtls_pk_can_do( const mbedtls_pk_context *ctx, mbedtls_pk_type_t type )
nexpaq 0:6c56fb4bc5f0 149 {
nexpaq 0:6c56fb4bc5f0 150 /* null or NONE context can't do anything */
nexpaq 0:6c56fb4bc5f0 151 if( ctx == NULL || ctx->pk_info == NULL )
nexpaq 0:6c56fb4bc5f0 152 return( 0 );
nexpaq 0:6c56fb4bc5f0 153
nexpaq 0:6c56fb4bc5f0 154 return( ctx->pk_info->can_do( type ) );
nexpaq 0:6c56fb4bc5f0 155 }
nexpaq 0:6c56fb4bc5f0 156
nexpaq 0:6c56fb4bc5f0 157 /*
nexpaq 0:6c56fb4bc5f0 158 * Helper for mbedtls_pk_sign and mbedtls_pk_verify
nexpaq 0:6c56fb4bc5f0 159 */
nexpaq 0:6c56fb4bc5f0 160 static inline int pk_hashlen_helper( mbedtls_md_type_t md_alg, size_t *hash_len )
nexpaq 0:6c56fb4bc5f0 161 {
nexpaq 0:6c56fb4bc5f0 162 const mbedtls_md_info_t *md_info;
nexpaq 0:6c56fb4bc5f0 163
nexpaq 0:6c56fb4bc5f0 164 if( *hash_len != 0 )
nexpaq 0:6c56fb4bc5f0 165 return( 0 );
nexpaq 0:6c56fb4bc5f0 166
nexpaq 0:6c56fb4bc5f0 167 if( ( md_info = mbedtls_md_info_from_type( md_alg ) ) == NULL )
nexpaq 0:6c56fb4bc5f0 168 return( -1 );
nexpaq 0:6c56fb4bc5f0 169
nexpaq 0:6c56fb4bc5f0 170 *hash_len = mbedtls_md_get_size( md_info );
nexpaq 0:6c56fb4bc5f0 171 return( 0 );
nexpaq 0:6c56fb4bc5f0 172 }
nexpaq 0:6c56fb4bc5f0 173
nexpaq 0:6c56fb4bc5f0 174 /*
nexpaq 0:6c56fb4bc5f0 175 * Verify a signature
nexpaq 0:6c56fb4bc5f0 176 */
nexpaq 0:6c56fb4bc5f0 177 int mbedtls_pk_verify( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
nexpaq 0:6c56fb4bc5f0 178 const unsigned char *hash, size_t hash_len,
nexpaq 0:6c56fb4bc5f0 179 const unsigned char *sig, size_t sig_len )
nexpaq 0:6c56fb4bc5f0 180 {
nexpaq 0:6c56fb4bc5f0 181 if( ctx == NULL || ctx->pk_info == NULL ||
nexpaq 0:6c56fb4bc5f0 182 pk_hashlen_helper( md_alg, &hash_len ) != 0 )
nexpaq 0:6c56fb4bc5f0 183 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
nexpaq 0:6c56fb4bc5f0 184
nexpaq 0:6c56fb4bc5f0 185 if( ctx->pk_info->verify_func == NULL )
nexpaq 0:6c56fb4bc5f0 186 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
nexpaq 0:6c56fb4bc5f0 187
nexpaq 0:6c56fb4bc5f0 188 return( ctx->pk_info->verify_func( ctx->pk_ctx, md_alg, hash, hash_len,
nexpaq 0:6c56fb4bc5f0 189 sig, sig_len ) );
nexpaq 0:6c56fb4bc5f0 190 }
nexpaq 0:6c56fb4bc5f0 191
nexpaq 0:6c56fb4bc5f0 192 /*
nexpaq 0:6c56fb4bc5f0 193 * Verify a signature with options
nexpaq 0:6c56fb4bc5f0 194 */
nexpaq 0:6c56fb4bc5f0 195 int mbedtls_pk_verify_ext( mbedtls_pk_type_t type, const void *options,
nexpaq 0:6c56fb4bc5f0 196 mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
nexpaq 0:6c56fb4bc5f0 197 const unsigned char *hash, size_t hash_len,
nexpaq 0:6c56fb4bc5f0 198 const unsigned char *sig, size_t sig_len )
nexpaq 0:6c56fb4bc5f0 199 {
nexpaq 0:6c56fb4bc5f0 200 if( ctx == NULL || ctx->pk_info == NULL )
nexpaq 0:6c56fb4bc5f0 201 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
nexpaq 0:6c56fb4bc5f0 202
nexpaq 0:6c56fb4bc5f0 203 if( ! mbedtls_pk_can_do( ctx, type ) )
nexpaq 0:6c56fb4bc5f0 204 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
nexpaq 0:6c56fb4bc5f0 205
nexpaq 0:6c56fb4bc5f0 206 if( type == MBEDTLS_PK_RSASSA_PSS )
nexpaq 0:6c56fb4bc5f0 207 {
nexpaq 0:6c56fb4bc5f0 208 #if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PKCS1_V21)
nexpaq 0:6c56fb4bc5f0 209 int ret;
nexpaq 0:6c56fb4bc5f0 210 const mbedtls_pk_rsassa_pss_options *pss_opts;
nexpaq 0:6c56fb4bc5f0 211
nexpaq 0:6c56fb4bc5f0 212 if( options == NULL )
nexpaq 0:6c56fb4bc5f0 213 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
nexpaq 0:6c56fb4bc5f0 214
nexpaq 0:6c56fb4bc5f0 215 pss_opts = (const mbedtls_pk_rsassa_pss_options *) options;
nexpaq 0:6c56fb4bc5f0 216
nexpaq 0:6c56fb4bc5f0 217 if( sig_len < mbedtls_pk_get_len( ctx ) )
nexpaq 0:6c56fb4bc5f0 218 return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
nexpaq 0:6c56fb4bc5f0 219
nexpaq 0:6c56fb4bc5f0 220 ret = mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_pk_rsa( *ctx ),
nexpaq 0:6c56fb4bc5f0 221 NULL, NULL, MBEDTLS_RSA_PUBLIC,
nexpaq 0:6c56fb4bc5f0 222 md_alg, (unsigned int) hash_len, hash,
nexpaq 0:6c56fb4bc5f0 223 pss_opts->mgf1_hash_id,
nexpaq 0:6c56fb4bc5f0 224 pss_opts->expected_salt_len,
nexpaq 0:6c56fb4bc5f0 225 sig );
nexpaq 0:6c56fb4bc5f0 226 if( ret != 0 )
nexpaq 0:6c56fb4bc5f0 227 return( ret );
nexpaq 0:6c56fb4bc5f0 228
nexpaq 0:6c56fb4bc5f0 229 if( sig_len > mbedtls_pk_get_len( ctx ) )
nexpaq 0:6c56fb4bc5f0 230 return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH );
nexpaq 0:6c56fb4bc5f0 231
nexpaq 0:6c56fb4bc5f0 232 return( 0 );
nexpaq 0:6c56fb4bc5f0 233 #else
nexpaq 0:6c56fb4bc5f0 234 return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
nexpaq 0:6c56fb4bc5f0 235 #endif
nexpaq 0:6c56fb4bc5f0 236 }
nexpaq 0:6c56fb4bc5f0 237
nexpaq 0:6c56fb4bc5f0 238 /* General case: no options */
nexpaq 0:6c56fb4bc5f0 239 if( options != NULL )
nexpaq 0:6c56fb4bc5f0 240 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
nexpaq 0:6c56fb4bc5f0 241
nexpaq 0:6c56fb4bc5f0 242 return( mbedtls_pk_verify( ctx, md_alg, hash, hash_len, sig, sig_len ) );
nexpaq 0:6c56fb4bc5f0 243 }
nexpaq 0:6c56fb4bc5f0 244
nexpaq 0:6c56fb4bc5f0 245 /*
nexpaq 0:6c56fb4bc5f0 246 * Make a signature
nexpaq 0:6c56fb4bc5f0 247 */
nexpaq 0:6c56fb4bc5f0 248 int mbedtls_pk_sign( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
nexpaq 0:6c56fb4bc5f0 249 const unsigned char *hash, size_t hash_len,
nexpaq 0:6c56fb4bc5f0 250 unsigned char *sig, size_t *sig_len,
nexpaq 0:6c56fb4bc5f0 251 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
nexpaq 0:6c56fb4bc5f0 252 {
nexpaq 0:6c56fb4bc5f0 253 if( ctx == NULL || ctx->pk_info == NULL ||
nexpaq 0:6c56fb4bc5f0 254 pk_hashlen_helper( md_alg, &hash_len ) != 0 )
nexpaq 0:6c56fb4bc5f0 255 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
nexpaq 0:6c56fb4bc5f0 256
nexpaq 0:6c56fb4bc5f0 257 if( ctx->pk_info->sign_func == NULL )
nexpaq 0:6c56fb4bc5f0 258 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
nexpaq 0:6c56fb4bc5f0 259
nexpaq 0:6c56fb4bc5f0 260 return( ctx->pk_info->sign_func( ctx->pk_ctx, md_alg, hash, hash_len,
nexpaq 0:6c56fb4bc5f0 261 sig, sig_len, f_rng, p_rng ) );
nexpaq 0:6c56fb4bc5f0 262 }
nexpaq 0:6c56fb4bc5f0 263
nexpaq 0:6c56fb4bc5f0 264 /*
nexpaq 0:6c56fb4bc5f0 265 * Decrypt message
nexpaq 0:6c56fb4bc5f0 266 */
nexpaq 0:6c56fb4bc5f0 267 int mbedtls_pk_decrypt( mbedtls_pk_context *ctx,
nexpaq 0:6c56fb4bc5f0 268 const unsigned char *input, size_t ilen,
nexpaq 0:6c56fb4bc5f0 269 unsigned char *output, size_t *olen, size_t osize,
nexpaq 0:6c56fb4bc5f0 270 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
nexpaq 0:6c56fb4bc5f0 271 {
nexpaq 0:6c56fb4bc5f0 272 if( ctx == NULL || ctx->pk_info == NULL )
nexpaq 0:6c56fb4bc5f0 273 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
nexpaq 0:6c56fb4bc5f0 274
nexpaq 0:6c56fb4bc5f0 275 if( ctx->pk_info->decrypt_func == NULL )
nexpaq 0:6c56fb4bc5f0 276 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
nexpaq 0:6c56fb4bc5f0 277
nexpaq 0:6c56fb4bc5f0 278 return( ctx->pk_info->decrypt_func( ctx->pk_ctx, input, ilen,
nexpaq 0:6c56fb4bc5f0 279 output, olen, osize, f_rng, p_rng ) );
nexpaq 0:6c56fb4bc5f0 280 }
nexpaq 0:6c56fb4bc5f0 281
nexpaq 0:6c56fb4bc5f0 282 /*
nexpaq 0:6c56fb4bc5f0 283 * Encrypt message
nexpaq 0:6c56fb4bc5f0 284 */
nexpaq 0:6c56fb4bc5f0 285 int mbedtls_pk_encrypt( mbedtls_pk_context *ctx,
nexpaq 0:6c56fb4bc5f0 286 const unsigned char *input, size_t ilen,
nexpaq 0:6c56fb4bc5f0 287 unsigned char *output, size_t *olen, size_t osize,
nexpaq 0:6c56fb4bc5f0 288 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
nexpaq 0:6c56fb4bc5f0 289 {
nexpaq 0:6c56fb4bc5f0 290 if( ctx == NULL || ctx->pk_info == NULL )
nexpaq 0:6c56fb4bc5f0 291 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
nexpaq 0:6c56fb4bc5f0 292
nexpaq 0:6c56fb4bc5f0 293 if( ctx->pk_info->encrypt_func == NULL )
nexpaq 0:6c56fb4bc5f0 294 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
nexpaq 0:6c56fb4bc5f0 295
nexpaq 0:6c56fb4bc5f0 296 return( ctx->pk_info->encrypt_func( ctx->pk_ctx, input, ilen,
nexpaq 0:6c56fb4bc5f0 297 output, olen, osize, f_rng, p_rng ) );
nexpaq 0:6c56fb4bc5f0 298 }
nexpaq 0:6c56fb4bc5f0 299
nexpaq 0:6c56fb4bc5f0 300 /*
nexpaq 0:6c56fb4bc5f0 301 * Check public-private key pair
nexpaq 0:6c56fb4bc5f0 302 */
nexpaq 0:6c56fb4bc5f0 303 int mbedtls_pk_check_pair( const mbedtls_pk_context *pub, const mbedtls_pk_context *prv )
nexpaq 0:6c56fb4bc5f0 304 {
nexpaq 0:6c56fb4bc5f0 305 if( pub == NULL || pub->pk_info == NULL ||
nexpaq 0:6c56fb4bc5f0 306 prv == NULL || prv->pk_info == NULL ||
nexpaq 0:6c56fb4bc5f0 307 prv->pk_info->check_pair_func == NULL )
nexpaq 0:6c56fb4bc5f0 308 {
nexpaq 0:6c56fb4bc5f0 309 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
nexpaq 0:6c56fb4bc5f0 310 }
nexpaq 0:6c56fb4bc5f0 311
nexpaq 0:6c56fb4bc5f0 312 if( prv->pk_info->type == MBEDTLS_PK_RSA_ALT )
nexpaq 0:6c56fb4bc5f0 313 {
nexpaq 0:6c56fb4bc5f0 314 if( pub->pk_info->type != MBEDTLS_PK_RSA )
nexpaq 0:6c56fb4bc5f0 315 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
nexpaq 0:6c56fb4bc5f0 316 }
nexpaq 0:6c56fb4bc5f0 317 else
nexpaq 0:6c56fb4bc5f0 318 {
nexpaq 0:6c56fb4bc5f0 319 if( pub->pk_info != prv->pk_info )
nexpaq 0:6c56fb4bc5f0 320 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
nexpaq 0:6c56fb4bc5f0 321 }
nexpaq 0:6c56fb4bc5f0 322
nexpaq 0:6c56fb4bc5f0 323 return( prv->pk_info->check_pair_func( pub->pk_ctx, prv->pk_ctx ) );
nexpaq 0:6c56fb4bc5f0 324 }
nexpaq 0:6c56fb4bc5f0 325
nexpaq 0:6c56fb4bc5f0 326 /*
nexpaq 0:6c56fb4bc5f0 327 * Get key size in bits
nexpaq 0:6c56fb4bc5f0 328 */
nexpaq 0:6c56fb4bc5f0 329 size_t mbedtls_pk_get_bitlen( const mbedtls_pk_context *ctx )
nexpaq 0:6c56fb4bc5f0 330 {
nexpaq 0:6c56fb4bc5f0 331 if( ctx == NULL || ctx->pk_info == NULL )
nexpaq 0:6c56fb4bc5f0 332 return( 0 );
nexpaq 0:6c56fb4bc5f0 333
nexpaq 0:6c56fb4bc5f0 334 return( ctx->pk_info->get_bitlen( ctx->pk_ctx ) );
nexpaq 0:6c56fb4bc5f0 335 }
nexpaq 0:6c56fb4bc5f0 336
nexpaq 0:6c56fb4bc5f0 337 /*
nexpaq 0:6c56fb4bc5f0 338 * Export debug information
nexpaq 0:6c56fb4bc5f0 339 */
nexpaq 0:6c56fb4bc5f0 340 int mbedtls_pk_debug( const mbedtls_pk_context *ctx, mbedtls_pk_debug_item *items )
nexpaq 0:6c56fb4bc5f0 341 {
nexpaq 0:6c56fb4bc5f0 342 if( ctx == NULL || ctx->pk_info == NULL )
nexpaq 0:6c56fb4bc5f0 343 return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
nexpaq 0:6c56fb4bc5f0 344
nexpaq 0:6c56fb4bc5f0 345 if( ctx->pk_info->debug_func == NULL )
nexpaq 0:6c56fb4bc5f0 346 return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
nexpaq 0:6c56fb4bc5f0 347
nexpaq 0:6c56fb4bc5f0 348 ctx->pk_info->debug_func( ctx->pk_ctx, items );
nexpaq 0:6c56fb4bc5f0 349 return( 0 );
nexpaq 0:6c56fb4bc5f0 350 }
nexpaq 0:6c56fb4bc5f0 351
nexpaq 0:6c56fb4bc5f0 352 /*
nexpaq 0:6c56fb4bc5f0 353 * Access the PK type name
nexpaq 0:6c56fb4bc5f0 354 */
nexpaq 0:6c56fb4bc5f0 355 const char *mbedtls_pk_get_name( const mbedtls_pk_context *ctx )
nexpaq 0:6c56fb4bc5f0 356 {
nexpaq 0:6c56fb4bc5f0 357 if( ctx == NULL || ctx->pk_info == NULL )
nexpaq 0:6c56fb4bc5f0 358 return( "invalid PK" );
nexpaq 0:6c56fb4bc5f0 359
nexpaq 0:6c56fb4bc5f0 360 return( ctx->pk_info->name );
nexpaq 0:6c56fb4bc5f0 361 }
nexpaq 0:6c56fb4bc5f0 362
nexpaq 0:6c56fb4bc5f0 363 /*
nexpaq 0:6c56fb4bc5f0 364 * Access the PK type
nexpaq 0:6c56fb4bc5f0 365 */
nexpaq 0:6c56fb4bc5f0 366 mbedtls_pk_type_t mbedtls_pk_get_type( const mbedtls_pk_context *ctx )
nexpaq 0:6c56fb4bc5f0 367 {
nexpaq 0:6c56fb4bc5f0 368 if( ctx == NULL || ctx->pk_info == NULL )
nexpaq 0:6c56fb4bc5f0 369 return( MBEDTLS_PK_NONE );
nexpaq 0:6c56fb4bc5f0 370
nexpaq 0:6c56fb4bc5f0 371 return( ctx->pk_info->type );
nexpaq 0:6c56fb4bc5f0 372 }
nexpaq 0:6c56fb4bc5f0 373
nexpaq 0:6c56fb4bc5f0 374 #endif /* MBEDTLS_PK_C */