| 1 | /* |
| 2 | * Public Key abstraction layer: wrapper functions |
| 3 | * |
| 4 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved |
| 5 | * SPDX-License-Identifier: GPL-2.0 |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * This file is part of mbed TLS (https://tls.mbed.org) |
| 22 | */ |
| 23 | |
| 24 | #if !defined(MBEDTLS_CONFIG_FILE) |
| 25 | #include "mbedtls/config.h" |
| 26 | #else |
| 27 | #include MBEDTLS_CONFIG_FILE |
| 28 | #endif |
| 29 | |
| 30 | #if defined(MBEDTLS_PK_C) |
| 31 | #include "mbedtls/pk_internal.h" |
| 32 | |
| 33 | /* Even if RSA not activated, for the sake of RSA-alt */ |
| 34 | #include "mbedtls/rsa.h" |
| 35 | |
| 36 | #include <string.h> |
| 37 | |
| 38 | #if defined(MBEDTLS_ECP_C) |
| 39 | #include "mbedtls/ecp.h" |
| 40 | #endif |
| 41 | |
| 42 | #if defined(MBEDTLS_ECDSA_C) |
| 43 | #include "mbedtls/ecdsa.h" |
| 44 | #endif |
| 45 | |
| 46 | #if defined(MBEDTLS_PK_RSA_ALT_SUPPORT) |
| 47 | #include "mbedtls/platform_util.h" |
| 48 | #endif |
| 49 | |
| 50 | #if defined(MBEDTLS_PLATFORM_C) |
| 51 | #include "mbedtls/platform.h" |
| 52 | #else |
| 53 | #include <stdlib.h> |
| 54 | #define mbedtls_calloc calloc |
| 55 | #define mbedtls_free free |
| 56 | #endif |
| 57 | |
| 58 | #include <limits.h> |
| 59 | #include <stdint.h> |
| 60 | |
| 61 | #if defined(MBEDTLS_RSA_C) |
| 62 | static int rsa_can_do( mbedtls_pk_type_t type ) |
| 63 | { |
| 64 | return( type == MBEDTLS_PK_RSA || |
| 65 | type == MBEDTLS_PK_RSASSA_PSS ); |
| 66 | } |
| 67 | |
| 68 | static size_t rsa_get_bitlen( const void *ctx ) |
| 69 | { |
| 70 | const mbedtls_rsa_context * rsa = (const mbedtls_rsa_context *) ctx; |
| 71 | return( 8 * mbedtls_rsa_get_len( rsa ) ); |
| 72 | } |
| 73 | |
| 74 | static int rsa_verify_wrap( void *ctx, mbedtls_md_type_t md_alg, |
| 75 | const unsigned char *hash, size_t hash_len, |
| 76 | const unsigned char *sig, size_t sig_len ) |
| 77 | { |
| 78 | int ret; |
| 79 | mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx; |
| 80 | size_t rsa_len = mbedtls_rsa_get_len( rsa ); |
| 81 | |
| 82 | #if SIZE_MAX > UINT_MAX |
| 83 | if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len ) |
| 84 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
| 85 | #endif /* SIZE_MAX > UINT_MAX */ |
| 86 | |
| 87 | if( sig_len < rsa_len ) |
| 88 | return( MBEDTLS_ERR_RSA_VERIFY_FAILED ); |
| 89 | |
| 90 | if( ( ret = mbedtls_rsa_pkcs1_verify( rsa, NULL, NULL, |
| 91 | MBEDTLS_RSA_PUBLIC, md_alg, |
| 92 | (unsigned int) hash_len, hash, sig ) ) != 0 ) |
| 93 | return( ret ); |
| 94 | |
| 95 | /* The buffer contains a valid signature followed by extra data. |
| 96 | * We have a special error code for that so that so that callers can |
| 97 | * use mbedtls_pk_verify() to check "Does the buffer start with a |
| 98 | * valid signature?" and not just "Does the buffer contain a valid |
| 99 | * signature?". */ |
| 100 | if( sig_len > rsa_len ) |
| 101 | return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH ); |
| 102 | |
| 103 | return( 0 ); |
| 104 | } |
| 105 | |
| 106 | static int rsa_sign_wrap( void *ctx, mbedtls_md_type_t md_alg, |
| 107 | const unsigned char *hash, size_t hash_len, |
| 108 | unsigned char *sig, size_t *sig_len, |
| 109 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ) |
| 110 | { |
| 111 | mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx; |
| 112 | |
| 113 | #if SIZE_MAX > UINT_MAX |
| 114 | if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len ) |
| 115 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
| 116 | #endif /* SIZE_MAX > UINT_MAX */ |
| 117 | |
| 118 | *sig_len = mbedtls_rsa_get_len( rsa ); |
| 119 | |
| 120 | return( mbedtls_rsa_pkcs1_sign( rsa, f_rng, p_rng, MBEDTLS_RSA_PRIVATE, |
| 121 | md_alg, (unsigned int) hash_len, hash, sig ) ); |
| 122 | } |
| 123 | |
| 124 | static int rsa_decrypt_wrap( void *ctx, |
| 125 | const unsigned char *input, size_t ilen, |
| 126 | unsigned char *output, size_t *olen, size_t osize, |
| 127 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ) |
| 128 | { |
| 129 | mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx; |
| 130 | |
| 131 | if( ilen != mbedtls_rsa_get_len( rsa ) ) |
| 132 | return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); |
| 133 | |
| 134 | return( mbedtls_rsa_pkcs1_decrypt( rsa, f_rng, p_rng, |
| 135 | MBEDTLS_RSA_PRIVATE, olen, input, output, osize ) ); |
| 136 | } |
| 137 | |
| 138 | static int rsa_encrypt_wrap( void *ctx, |
| 139 | const unsigned char *input, size_t ilen, |
| 140 | unsigned char *output, size_t *olen, size_t osize, |
| 141 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ) |
| 142 | { |
| 143 | mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx; |
| 144 | *olen = mbedtls_rsa_get_len( rsa ); |
| 145 | |
| 146 | if( *olen > osize ) |
| 147 | return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE ); |
| 148 | |
| 149 | return( mbedtls_rsa_pkcs1_encrypt( rsa, f_rng, p_rng, MBEDTLS_RSA_PUBLIC, |
| 150 | ilen, input, output ) ); |
| 151 | } |
| 152 | |
| 153 | static int rsa_check_pair_wrap( const void *pub, const void *prv ) |
| 154 | { |
| 155 | return( mbedtls_rsa_check_pub_priv( (const mbedtls_rsa_context *) pub, |
| 156 | (const mbedtls_rsa_context *) prv ) ); |
| 157 | } |
| 158 | |
| 159 | static void *rsa_alloc_wrap( void ) |
| 160 | { |
| 161 | void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_rsa_context ) ); |
| 162 | |
| 163 | if( ctx != NULL ) |
| 164 | mbedtls_rsa_init( (mbedtls_rsa_context *) ctx, 0, 0 ); |
| 165 | |
| 166 | return( ctx ); |
| 167 | } |
| 168 | |
| 169 | static void rsa_free_wrap( void *ctx ) |
| 170 | { |
| 171 | mbedtls_rsa_free( (mbedtls_rsa_context *) ctx ); |
| 172 | mbedtls_free( ctx ); |
| 173 | } |
| 174 | |
| 175 | static void rsa_debug( const void *ctx, mbedtls_pk_debug_item *items ) |
| 176 | { |
| 177 | items->type = MBEDTLS_PK_DEBUG_MPI; |
| 178 | items->name = "rsa.N"; |
| 179 | items->value = &( ((mbedtls_rsa_context *) ctx)->N ); |
| 180 | |
| 181 | items++; |
| 182 | |
| 183 | items->type = MBEDTLS_PK_DEBUG_MPI; |
| 184 | items->name = "rsa.E"; |
| 185 | items->value = &( ((mbedtls_rsa_context *) ctx)->E ); |
| 186 | } |
| 187 | |
| 188 | const mbedtls_pk_info_t mbedtls_rsa_info = { |
| 189 | MBEDTLS_PK_RSA, |
| 190 | "RSA", |
| 191 | rsa_get_bitlen, |
| 192 | rsa_can_do, |
| 193 | rsa_verify_wrap, |
| 194 | rsa_sign_wrap, |
| 195 | rsa_decrypt_wrap, |
| 196 | rsa_encrypt_wrap, |
| 197 | rsa_check_pair_wrap, |
| 198 | rsa_alloc_wrap, |
| 199 | rsa_free_wrap, |
| 200 | rsa_debug, |
| 201 | }; |
| 202 | #endif /* MBEDTLS_RSA_C */ |
| 203 | |
| 204 | #if defined(MBEDTLS_ECP_C) |
| 205 | /* |
| 206 | * Generic EC key |
| 207 | */ |
| 208 | static int eckey_can_do( mbedtls_pk_type_t type ) |
| 209 | { |
| 210 | return( type == MBEDTLS_PK_ECKEY || |
| 211 | type == MBEDTLS_PK_ECKEY_DH || |
| 212 | type == MBEDTLS_PK_ECDSA ); |
| 213 | } |
| 214 | |
| 215 | static size_t eckey_get_bitlen( const void *ctx ) |
| 216 | { |
| 217 | return( ((mbedtls_ecp_keypair *) ctx)->grp.pbits ); |
| 218 | } |
| 219 | |
| 220 | #if defined(MBEDTLS_ECDSA_C) |
| 221 | /* Forward declarations */ |
| 222 | static int ecdsa_verify_wrap( void *ctx, mbedtls_md_type_t md_alg, |
| 223 | const unsigned char *hash, size_t hash_len, |
| 224 | const unsigned char *sig, size_t sig_len ); |
| 225 | |
| 226 | static int ecdsa_sign_wrap( void *ctx, mbedtls_md_type_t md_alg, |
| 227 | const unsigned char *hash, size_t hash_len, |
| 228 | unsigned char *sig, size_t *sig_len, |
| 229 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ); |
| 230 | |
| 231 | static int eckey_verify_wrap( void *ctx, mbedtls_md_type_t md_alg, |
| 232 | const unsigned char *hash, size_t hash_len, |
| 233 | const unsigned char *sig, size_t sig_len ) |
| 234 | { |
| 235 | int ret; |
| 236 | mbedtls_ecdsa_context ecdsa; |
| 237 | |
| 238 | mbedtls_ecdsa_init( &ecdsa ); |
| 239 | |
| 240 | if( ( ret = mbedtls_ecdsa_from_keypair( &ecdsa, ctx ) ) == 0 ) |
| 241 | ret = ecdsa_verify_wrap( &ecdsa, md_alg, hash, hash_len, sig, sig_len ); |
| 242 | |
| 243 | mbedtls_ecdsa_free( &ecdsa ); |
| 244 | |
| 245 | return( ret ); |
| 246 | } |
| 247 | |
| 248 | static int eckey_sign_wrap( void *ctx, mbedtls_md_type_t md_alg, |
| 249 | const unsigned char *hash, size_t hash_len, |
| 250 | unsigned char *sig, size_t *sig_len, |
| 251 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ) |
| 252 | { |
| 253 | int ret; |
| 254 | mbedtls_ecdsa_context ecdsa; |
| 255 | |
| 256 | mbedtls_ecdsa_init( &ecdsa ); |
| 257 | |
| 258 | if( ( ret = mbedtls_ecdsa_from_keypair( &ecdsa, ctx ) ) == 0 ) |
| 259 | ret = ecdsa_sign_wrap( &ecdsa, md_alg, hash, hash_len, sig, sig_len, |
| 260 | f_rng, p_rng ); |
| 261 | |
| 262 | mbedtls_ecdsa_free( &ecdsa ); |
| 263 | |
| 264 | return( ret ); |
| 265 | } |
| 266 | |
| 267 | #endif /* MBEDTLS_ECDSA_C */ |
| 268 | |
| 269 | static int eckey_check_pair( const void *pub, const void *prv ) |
| 270 | { |
| 271 | return( mbedtls_ecp_check_pub_priv( (const mbedtls_ecp_keypair *) pub, |
| 272 | (const mbedtls_ecp_keypair *) prv ) ); |
| 273 | } |
| 274 | |
| 275 | static void *eckey_alloc_wrap( void ) |
| 276 | { |
| 277 | void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_ecp_keypair ) ); |
| 278 | |
| 279 | if( ctx != NULL ) |
| 280 | mbedtls_ecp_keypair_init( ctx ); |
| 281 | |
| 282 | return( ctx ); |
| 283 | } |
| 284 | |
| 285 | static void eckey_free_wrap( void *ctx ) |
| 286 | { |
| 287 | mbedtls_ecp_keypair_free( (mbedtls_ecp_keypair *) ctx ); |
| 288 | mbedtls_free( ctx ); |
| 289 | } |
| 290 | |
| 291 | static void eckey_debug( const void *ctx, mbedtls_pk_debug_item *items ) |
| 292 | { |
| 293 | items->type = MBEDTLS_PK_DEBUG_ECP; |
| 294 | items->name = "eckey.Q"; |
| 295 | items->value = &( ((mbedtls_ecp_keypair *) ctx)->Q ); |
| 296 | } |
| 297 | |
| 298 | const mbedtls_pk_info_t mbedtls_eckey_info = { |
| 299 | MBEDTLS_PK_ECKEY, |
| 300 | "EC", |
| 301 | eckey_get_bitlen, |
| 302 | eckey_can_do, |
| 303 | #if defined(MBEDTLS_ECDSA_C) |
| 304 | eckey_verify_wrap, |
| 305 | eckey_sign_wrap, |
| 306 | #else |
| 307 | NULL, |
| 308 | NULL, |
| 309 | #endif |
| 310 | NULL, |
| 311 | NULL, |
| 312 | eckey_check_pair, |
| 313 | eckey_alloc_wrap, |
| 314 | eckey_free_wrap, |
| 315 | eckey_debug, |
| 316 | }; |
| 317 | |
| 318 | /* |
| 319 | * EC key restricted to ECDH |
| 320 | */ |
| 321 | static int eckeydh_can_do( mbedtls_pk_type_t type ) |
| 322 | { |
| 323 | return( type == MBEDTLS_PK_ECKEY || |
| 324 | type == MBEDTLS_PK_ECKEY_DH ); |
| 325 | } |
| 326 | |
| 327 | const mbedtls_pk_info_t mbedtls_eckeydh_info = { |
| 328 | MBEDTLS_PK_ECKEY_DH, |
| 329 | "EC_DH", |
| 330 | eckey_get_bitlen, /* Same underlying key structure */ |
| 331 | eckeydh_can_do, |
| 332 | NULL, |
| 333 | NULL, |
| 334 | NULL, |
| 335 | NULL, |
| 336 | eckey_check_pair, |
| 337 | eckey_alloc_wrap, /* Same underlying key structure */ |
| 338 | eckey_free_wrap, /* Same underlying key structure */ |
| 339 | eckey_debug, /* Same underlying key structure */ |
| 340 | }; |
| 341 | #endif /* MBEDTLS_ECP_C */ |
| 342 | |
| 343 | #if defined(MBEDTLS_ECDSA_C) |
| 344 | static int ecdsa_can_do( mbedtls_pk_type_t type ) |
| 345 | { |
| 346 | return( type == MBEDTLS_PK_ECDSA ); |
| 347 | } |
| 348 | |
| 349 | static int ecdsa_verify_wrap( void *ctx, mbedtls_md_type_t md_alg, |
| 350 | const unsigned char *hash, size_t hash_len, |
| 351 | const unsigned char *sig, size_t sig_len ) |
| 352 | { |
| 353 | int ret; |
| 354 | ((void) md_alg); |
| 355 | |
| 356 | ret = mbedtls_ecdsa_read_signature( (mbedtls_ecdsa_context *) ctx, |
| 357 | hash, hash_len, sig, sig_len ); |
| 358 | |
| 359 | if( ret == MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH ) |
| 360 | return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH ); |
| 361 | |
| 362 | return( ret ); |
| 363 | } |
| 364 | |
| 365 | static int ecdsa_sign_wrap( void *ctx, mbedtls_md_type_t md_alg, |
| 366 | const unsigned char *hash, size_t hash_len, |
| 367 | unsigned char *sig, size_t *sig_len, |
| 368 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ) |
| 369 | { |
| 370 | return( mbedtls_ecdsa_write_signature( (mbedtls_ecdsa_context *) ctx, |
| 371 | md_alg, hash, hash_len, sig, sig_len, f_rng, p_rng ) ); |
| 372 | } |
| 373 | |
| 374 | static void *ecdsa_alloc_wrap( void ) |
| 375 | { |
| 376 | void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_ecdsa_context ) ); |
| 377 | |
| 378 | if( ctx != NULL ) |
| 379 | mbedtls_ecdsa_init( (mbedtls_ecdsa_context *) ctx ); |
| 380 | |
| 381 | return( ctx ); |
| 382 | } |
| 383 | |
| 384 | static void ecdsa_free_wrap( void *ctx ) |
| 385 | { |
| 386 | mbedtls_ecdsa_free( (mbedtls_ecdsa_context *) ctx ); |
| 387 | mbedtls_free( ctx ); |
| 388 | } |
| 389 | |
| 390 | const mbedtls_pk_info_t mbedtls_ecdsa_info = { |
| 391 | MBEDTLS_PK_ECDSA, |
| 392 | "ECDSA", |
| 393 | eckey_get_bitlen, /* Compatible key structures */ |
| 394 | ecdsa_can_do, |
| 395 | ecdsa_verify_wrap, |
| 396 | ecdsa_sign_wrap, |
| 397 | NULL, |
| 398 | NULL, |
| 399 | eckey_check_pair, /* Compatible key structures */ |
| 400 | ecdsa_alloc_wrap, |
| 401 | ecdsa_free_wrap, |
| 402 | eckey_debug, /* Compatible key structures */ |
| 403 | }; |
| 404 | #endif /* MBEDTLS_ECDSA_C */ |
| 405 | |
| 406 | #if defined(MBEDTLS_PK_RSA_ALT_SUPPORT) |
| 407 | /* |
| 408 | * Support for alternative RSA-private implementations |
| 409 | */ |
| 410 | |
| 411 | static int rsa_alt_can_do( mbedtls_pk_type_t type ) |
| 412 | { |
| 413 | return( type == MBEDTLS_PK_RSA ); |
| 414 | } |
| 415 | |
| 416 | static size_t rsa_alt_get_bitlen( const void *ctx ) |
| 417 | { |
| 418 | const mbedtls_rsa_alt_context *rsa_alt = (const mbedtls_rsa_alt_context *) ctx; |
| 419 | |
| 420 | return( 8 * rsa_alt->key_len_func( rsa_alt->key ) ); |
| 421 | } |
| 422 | |
| 423 | static int rsa_alt_sign_wrap( void *ctx, mbedtls_md_type_t md_alg, |
| 424 | const unsigned char *hash, size_t hash_len, |
| 425 | unsigned char *sig, size_t *sig_len, |
| 426 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ) |
| 427 | { |
| 428 | mbedtls_rsa_alt_context *rsa_alt = (mbedtls_rsa_alt_context *) ctx; |
| 429 | |
| 430 | #if SIZE_MAX > UINT_MAX |
| 431 | if( UINT_MAX < hash_len ) |
| 432 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
| 433 | #endif /* SIZE_MAX > UINT_MAX */ |
| 434 | |
| 435 | *sig_len = rsa_alt->key_len_func( rsa_alt->key ); |
| 436 | |
| 437 | return( rsa_alt->sign_func( rsa_alt->key, f_rng, p_rng, MBEDTLS_RSA_PRIVATE, |
| 438 | md_alg, (unsigned int) hash_len, hash, sig ) ); |
| 439 | } |
| 440 | |
| 441 | static int rsa_alt_decrypt_wrap( void *ctx, |
| 442 | const unsigned char *input, size_t ilen, |
| 443 | unsigned char *output, size_t *olen, size_t osize, |
| 444 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ) |
| 445 | { |
| 446 | mbedtls_rsa_alt_context *rsa_alt = (mbedtls_rsa_alt_context *) ctx; |
| 447 | |
| 448 | ((void) f_rng); |
| 449 | ((void) p_rng); |
| 450 | |
| 451 | if( ilen != rsa_alt->key_len_func( rsa_alt->key ) ) |
| 452 | return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); |
| 453 | |
| 454 | return( rsa_alt->decrypt_func( rsa_alt->key, |
| 455 | MBEDTLS_RSA_PRIVATE, olen, input, output, osize ) ); |
| 456 | } |
| 457 | |
| 458 | #if defined(MBEDTLS_RSA_C) |
| 459 | static int rsa_alt_check_pair( const void *pub, const void *prv ) |
| 460 | { |
| 461 | unsigned char sig[MBEDTLS_MPI_MAX_SIZE]; |
| 462 | unsigned char hash[32]; |
| 463 | size_t sig_len = 0; |
| 464 | int ret; |
| 465 | |
| 466 | if( rsa_alt_get_bitlen( prv ) != rsa_get_bitlen( pub ) ) |
| 467 | return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED ); |
| 468 | |
| 469 | memset( hash, 0x2a, sizeof( hash ) ); |
| 470 | |
| 471 | if( ( ret = rsa_alt_sign_wrap( (void *) prv, MBEDTLS_MD_NONE, |
| 472 | hash, sizeof( hash ), |
| 473 | sig, &sig_len, NULL, NULL ) ) != 0 ) |
| 474 | { |
| 475 | return( ret ); |
| 476 | } |
| 477 | |
| 478 | if( rsa_verify_wrap( (void *) pub, MBEDTLS_MD_NONE, |
| 479 | hash, sizeof( hash ), sig, sig_len ) != 0 ) |
| 480 | { |
| 481 | return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED ); |
| 482 | } |
| 483 | |
| 484 | return( 0 ); |
| 485 | } |
| 486 | #endif /* MBEDTLS_RSA_C */ |
| 487 | |
| 488 | static void *rsa_alt_alloc_wrap( void ) |
| 489 | { |
| 490 | void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_rsa_alt_context ) ); |
| 491 | |
| 492 | if( ctx != NULL ) |
| 493 | memset( ctx, 0, sizeof( mbedtls_rsa_alt_context ) ); |
| 494 | |
| 495 | return( ctx ); |
| 496 | } |
| 497 | |
| 498 | static void rsa_alt_free_wrap( void *ctx ) |
| 499 | { |
| 500 | mbedtls_platform_zeroize( ctx, sizeof( mbedtls_rsa_alt_context ) ); |
| 501 | mbedtls_free( ctx ); |
| 502 | } |
| 503 | |
| 504 | const mbedtls_pk_info_t mbedtls_rsa_alt_info = { |
| 505 | MBEDTLS_PK_RSA_ALT, |
| 506 | "RSA-alt", |
| 507 | rsa_alt_get_bitlen, |
| 508 | rsa_alt_can_do, |
| 509 | NULL, |
| 510 | rsa_alt_sign_wrap, |
| 511 | rsa_alt_decrypt_wrap, |
| 512 | NULL, |
| 513 | #if defined(MBEDTLS_RSA_C) |
| 514 | rsa_alt_check_pair, |
| 515 | #else |
| 516 | NULL, |
| 517 | #endif |
| 518 | rsa_alt_alloc_wrap, |
| 519 | rsa_alt_free_wrap, |
| 520 | NULL, |
| 521 | }; |
| 522 | |
| 523 | #endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */ |
| 524 | |
| 525 | #endif /* MBEDTLS_PK_C */ |