1 /* 2 * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 /* 11 * This is the OSSLTEST engine. It provides deliberately crippled digest 12 * implementations for test purposes. It is highly insecure and must NOT be 13 * used for any purpose except testing 14 */ 15 16 #include <stdio.h> 17 #include <string.h> 18 19 #include <openssl/engine.h> 20 #include <openssl/sha.h> 21 #include <openssl/md5.h> 22 #include <openssl/rsa.h> 23 #include <openssl/evp.h> 24 #include <openssl/modes.h> 25 #include <openssl/aes.h> 26 #include <openssl/rand.h> 27 #include <openssl/crypto.h> 28 29 #include "e_ossltest_err.c" 30 31 /* Engine Id and Name */ 32 static const char *engine_ossltest_id = "ossltest"; 33 static const char *engine_ossltest_name = "OpenSSL Test engine support"; 34 35 36 /* Engine Lifetime functions */ 37 static int ossltest_destroy(ENGINE *e); 38 static int ossltest_init(ENGINE *e); 39 static int ossltest_finish(ENGINE *e); 40 void ENGINE_load_ossltest(void); 41 42 43 /* Set up digests */ 44 static int ossltest_digests(ENGINE *e, const EVP_MD **digest, 45 const int **nids, int nid); 46 static const RAND_METHOD *ossltest_rand_method(void); 47 48 /* MD5 */ 49 static int digest_md5_init(EVP_MD_CTX *ctx); 50 static int digest_md5_update(EVP_MD_CTX *ctx, const void *data, 51 size_t count); 52 static int digest_md5_final(EVP_MD_CTX *ctx, unsigned char *md); 53 54 static EVP_MD *_hidden_md5_md = NULL; 55 static const EVP_MD *digest_md5(void) 56 { 57 if (_hidden_md5_md == NULL) { 58 EVP_MD *md; 59 60 if ((md = EVP_MD_meth_new(NID_md5, NID_md5WithRSAEncryption)) == NULL 61 || !EVP_MD_meth_set_result_size(md, MD5_DIGEST_LENGTH) 62 || !EVP_MD_meth_set_input_blocksize(md, MD5_CBLOCK) 63 || !EVP_MD_meth_set_app_datasize(md, 64 sizeof(EVP_MD *) + sizeof(MD5_CTX)) 65 || !EVP_MD_meth_set_flags(md, 0) 66 || !EVP_MD_meth_set_init(md, digest_md5_init) 67 || !EVP_MD_meth_set_update(md, digest_md5_update) 68 || !EVP_MD_meth_set_final(md, digest_md5_final)) { 69 EVP_MD_meth_free(md); 70 md = NULL; 71 } 72 _hidden_md5_md = md; 73 } 74 return _hidden_md5_md; 75 } 76 77 /* SHA1 */ 78 static int digest_sha1_init(EVP_MD_CTX *ctx); 79 static int digest_sha1_update(EVP_MD_CTX *ctx, const void *data, 80 size_t count); 81 static int digest_sha1_final(EVP_MD_CTX *ctx, unsigned char *md); 82 83 static EVP_MD *_hidden_sha1_md = NULL; 84 static const EVP_MD *digest_sha1(void) 85 { 86 if (_hidden_sha1_md == NULL) { 87 EVP_MD *md; 88 89 if ((md = EVP_MD_meth_new(NID_sha1, NID_sha1WithRSAEncryption)) == NULL 90 || !EVP_MD_meth_set_result_size(md, SHA_DIGEST_LENGTH) 91 || !EVP_MD_meth_set_input_blocksize(md, SHA_CBLOCK) 92 || !EVP_MD_meth_set_app_datasize(md, 93 sizeof(EVP_MD *) + sizeof(SHA_CTX)) 94 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT) 95 || !EVP_MD_meth_set_init(md, digest_sha1_init) 96 || !EVP_MD_meth_set_update(md, digest_sha1_update) 97 || !EVP_MD_meth_set_final(md, digest_sha1_final)) { 98 EVP_MD_meth_free(md); 99 md = NULL; 100 } 101 _hidden_sha1_md = md; 102 } 103 return _hidden_sha1_md; 104 } 105 106 /* SHA256 */ 107 static int digest_sha256_init(EVP_MD_CTX *ctx); 108 static int digest_sha256_update(EVP_MD_CTX *ctx, const void *data, 109 size_t count); 110 static int digest_sha256_final(EVP_MD_CTX *ctx, unsigned char *md); 111 112 static EVP_MD *_hidden_sha256_md = NULL; 113 static const EVP_MD *digest_sha256(void) 114 { 115 if (_hidden_sha256_md == NULL) { 116 EVP_MD *md; 117 118 if ((md = EVP_MD_meth_new(NID_sha256, NID_sha256WithRSAEncryption)) == NULL 119 || !EVP_MD_meth_set_result_size(md, SHA256_DIGEST_LENGTH) 120 || !EVP_MD_meth_set_input_blocksize(md, SHA256_CBLOCK) 121 || !EVP_MD_meth_set_app_datasize(md, 122 sizeof(EVP_MD *) + sizeof(SHA256_CTX)) 123 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT) 124 || !EVP_MD_meth_set_init(md, digest_sha256_init) 125 || !EVP_MD_meth_set_update(md, digest_sha256_update) 126 || !EVP_MD_meth_set_final(md, digest_sha256_final)) { 127 EVP_MD_meth_free(md); 128 md = NULL; 129 } 130 _hidden_sha256_md = md; 131 } 132 return _hidden_sha256_md; 133 } 134 135 /* SHA384/SHA512 */ 136 static int digest_sha384_init(EVP_MD_CTX *ctx); 137 static int digest_sha512_init(EVP_MD_CTX *ctx); 138 static int digest_sha512_update(EVP_MD_CTX *ctx, const void *data, 139 size_t count); 140 static int digest_sha384_final(EVP_MD_CTX *ctx, unsigned char *md); 141 static int digest_sha512_final(EVP_MD_CTX *ctx, unsigned char *md); 142 143 static EVP_MD *_hidden_sha384_md = NULL; 144 static const EVP_MD *digest_sha384(void) 145 { 146 if (_hidden_sha384_md == NULL) { 147 EVP_MD *md; 148 149 if ((md = EVP_MD_meth_new(NID_sha384, NID_sha384WithRSAEncryption)) == NULL 150 || !EVP_MD_meth_set_result_size(md, SHA384_DIGEST_LENGTH) 151 || !EVP_MD_meth_set_input_blocksize(md, SHA512_CBLOCK) 152 || !EVP_MD_meth_set_app_datasize(md, 153 sizeof(EVP_MD *) + sizeof(SHA512_CTX)) 154 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT) 155 || !EVP_MD_meth_set_init(md, digest_sha384_init) 156 || !EVP_MD_meth_set_update(md, digest_sha512_update) 157 || !EVP_MD_meth_set_final(md, digest_sha384_final)) { 158 EVP_MD_meth_free(md); 159 md = NULL; 160 } 161 _hidden_sha384_md = md; 162 } 163 return _hidden_sha384_md; 164 } 165 static EVP_MD *_hidden_sha512_md = NULL; 166 static const EVP_MD *digest_sha512(void) 167 { 168 if (_hidden_sha512_md == NULL) { 169 EVP_MD *md; 170 171 if ((md = EVP_MD_meth_new(NID_sha512, NID_sha512WithRSAEncryption)) == NULL 172 || !EVP_MD_meth_set_result_size(md, SHA512_DIGEST_LENGTH) 173 || !EVP_MD_meth_set_input_blocksize(md, SHA512_CBLOCK) 174 || !EVP_MD_meth_set_app_datasize(md, 175 sizeof(EVP_MD *) + sizeof(SHA512_CTX)) 176 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT) 177 || !EVP_MD_meth_set_init(md, digest_sha512_init) 178 || !EVP_MD_meth_set_update(md, digest_sha512_update) 179 || !EVP_MD_meth_set_final(md, digest_sha512_final)) { 180 EVP_MD_meth_free(md); 181 md = NULL; 182 } 183 _hidden_sha512_md = md; 184 } 185 return _hidden_sha512_md; 186 } 187 static void destroy_digests(void) 188 { 189 EVP_MD_meth_free(_hidden_md5_md); 190 _hidden_md5_md = NULL; 191 EVP_MD_meth_free(_hidden_sha1_md); 192 _hidden_sha1_md = NULL; 193 EVP_MD_meth_free(_hidden_sha256_md); 194 _hidden_sha256_md = NULL; 195 EVP_MD_meth_free(_hidden_sha384_md); 196 _hidden_sha384_md = NULL; 197 EVP_MD_meth_free(_hidden_sha512_md); 198 _hidden_sha512_md = NULL; 199 } 200 static int ossltest_digest_nids(const int **nids) 201 { 202 static int digest_nids[6] = { 0, 0, 0, 0, 0, 0 }; 203 static int pos = 0; 204 static int init = 0; 205 206 if (!init) { 207 const EVP_MD *md; 208 if ((md = digest_md5()) != NULL) 209 digest_nids[pos++] = EVP_MD_type(md); 210 if ((md = digest_sha1()) != NULL) 211 digest_nids[pos++] = EVP_MD_type(md); 212 if ((md = digest_sha256()) != NULL) 213 digest_nids[pos++] = EVP_MD_type(md); 214 if ((md = digest_sha384()) != NULL) 215 digest_nids[pos++] = EVP_MD_type(md); 216 if ((md = digest_sha512()) != NULL) 217 digest_nids[pos++] = EVP_MD_type(md); 218 digest_nids[pos] = 0; 219 init = 1; 220 } 221 *nids = digest_nids; 222 return pos; 223 } 224 225 /* Setup ciphers */ 226 static int ossltest_ciphers(ENGINE *, const EVP_CIPHER **, 227 const int **, int); 228 229 static int ossltest_cipher_nids[] = { 230 NID_aes_128_cbc, NID_aes_128_gcm, 0 231 }; 232 233 /* AES128 */ 234 235 int ossltest_aes128_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 236 const unsigned char *iv, int enc); 237 int ossltest_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 238 const unsigned char *in, size_t inl); 239 int ossltest_aes128_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 240 const unsigned char *iv, int enc); 241 int ossltest_aes128_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 242 const unsigned char *in, size_t inl); 243 static int ossltest_aes128_gcm_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, 244 void *ptr); 245 246 static EVP_CIPHER *_hidden_aes_128_cbc = NULL; 247 static const EVP_CIPHER *ossltest_aes_128_cbc(void) 248 { 249 if (_hidden_aes_128_cbc == NULL 250 && ((_hidden_aes_128_cbc = EVP_CIPHER_meth_new(NID_aes_128_cbc, 251 16 /* block size */, 252 16 /* key len */)) == NULL 253 || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_cbc,16) 254 || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_cbc, 255 EVP_CIPH_FLAG_DEFAULT_ASN1 256 | EVP_CIPH_CBC_MODE) 257 || !EVP_CIPHER_meth_set_init(_hidden_aes_128_cbc, 258 ossltest_aes128_init_key) 259 || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_cbc, 260 ossltest_aes128_cbc_cipher) 261 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_cbc, 262 EVP_CIPHER_impl_ctx_size(EVP_aes_128_cbc())))) { 263 EVP_CIPHER_meth_free(_hidden_aes_128_cbc); 264 _hidden_aes_128_cbc = NULL; 265 } 266 return _hidden_aes_128_cbc; 267 } 268 static EVP_CIPHER *_hidden_aes_128_gcm = NULL; 269 270 #define AES_GCM_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \ 271 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \ 272 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \ 273 | EVP_CIPH_CUSTOM_COPY |EVP_CIPH_FLAG_AEAD_CIPHER \ 274 | EVP_CIPH_GCM_MODE) 275 276 static const EVP_CIPHER *ossltest_aes_128_gcm(void) 277 { 278 if (_hidden_aes_128_gcm == NULL 279 && ((_hidden_aes_128_gcm = EVP_CIPHER_meth_new(NID_aes_128_gcm, 280 1 /* block size */, 281 16 /* key len */)) == NULL 282 || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_gcm,12) 283 || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_gcm, AES_GCM_FLAGS) 284 || !EVP_CIPHER_meth_set_init(_hidden_aes_128_gcm, 285 ossltest_aes128_gcm_init_key) 286 || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_gcm, 287 ossltest_aes128_gcm_cipher) 288 || !EVP_CIPHER_meth_set_ctrl(_hidden_aes_128_gcm, 289 ossltest_aes128_gcm_ctrl) 290 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_gcm, 291 EVP_CIPHER_impl_ctx_size(EVP_aes_128_gcm())))) { 292 EVP_CIPHER_meth_free(_hidden_aes_128_gcm); 293 _hidden_aes_128_gcm = NULL; 294 } 295 return _hidden_aes_128_gcm; 296 } 297 298 static void destroy_ciphers(void) 299 { 300 EVP_CIPHER_meth_free(_hidden_aes_128_cbc); 301 EVP_CIPHER_meth_free(_hidden_aes_128_gcm); 302 _hidden_aes_128_cbc = NULL; 303 } 304 305 static int bind_ossltest(ENGINE *e) 306 { 307 /* Ensure the ossltest error handling is set up */ 308 ERR_load_OSSLTEST_strings(); 309 310 if (!ENGINE_set_id(e, engine_ossltest_id) 311 || !ENGINE_set_name(e, engine_ossltest_name) 312 || !ENGINE_set_digests(e, ossltest_digests) 313 || !ENGINE_set_ciphers(e, ossltest_ciphers) 314 || !ENGINE_set_RAND(e, ossltest_rand_method()) 315 || !ENGINE_set_destroy_function(e, ossltest_destroy) 316 || !ENGINE_set_init_function(e, ossltest_init) 317 || !ENGINE_set_finish_function(e, ossltest_finish)) { 318 OSSLTESTerr(OSSLTEST_F_BIND_OSSLTEST, OSSLTEST_R_INIT_FAILED); 319 return 0; 320 } 321 322 return 1; 323 } 324 325 #ifndef OPENSSL_NO_DYNAMIC_ENGINE 326 static int bind_helper(ENGINE *e, const char *id) 327 { 328 if (id && (strcmp(id, engine_ossltest_id) != 0)) 329 return 0; 330 if (!bind_ossltest(e)) 331 return 0; 332 return 1; 333 } 334 335 IMPLEMENT_DYNAMIC_CHECK_FN() 336 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper) 337 #endif 338 339 static ENGINE *engine_ossltest(void) 340 { 341 ENGINE *ret = ENGINE_new(); 342 if (ret == NULL) 343 return NULL; 344 if (!bind_ossltest(ret)) { 345 ENGINE_free(ret); 346 return NULL; 347 } 348 return ret; 349 } 350 351 void ENGINE_load_ossltest(void) 352 { 353 /* Copied from eng_[openssl|dyn].c */ 354 ENGINE *toadd = engine_ossltest(); 355 if (!toadd) 356 return; 357 ENGINE_add(toadd); 358 ENGINE_free(toadd); 359 ERR_clear_error(); 360 } 361 362 363 static int ossltest_init(ENGINE *e) 364 { 365 return 1; 366 } 367 368 369 static int ossltest_finish(ENGINE *e) 370 { 371 return 1; 372 } 373 374 375 static int ossltest_destroy(ENGINE *e) 376 { 377 destroy_digests(); 378 destroy_ciphers(); 379 ERR_unload_OSSLTEST_strings(); 380 return 1; 381 } 382 383 static int ossltest_digests(ENGINE *e, const EVP_MD **digest, 384 const int **nids, int nid) 385 { 386 int ok = 1; 387 if (!digest) { 388 /* We are returning a list of supported nids */ 389 return ossltest_digest_nids(nids); 390 } 391 /* We are being asked for a specific digest */ 392 switch (nid) { 393 case NID_md5: 394 *digest = digest_md5(); 395 break; 396 case NID_sha1: 397 *digest = digest_sha1(); 398 break; 399 case NID_sha256: 400 *digest = digest_sha256(); 401 break; 402 case NID_sha384: 403 *digest = digest_sha384(); 404 break; 405 case NID_sha512: 406 *digest = digest_sha512(); 407 break; 408 default: 409 ok = 0; 410 *digest = NULL; 411 break; 412 } 413 return ok; 414 } 415 416 static int ossltest_ciphers(ENGINE *e, const EVP_CIPHER **cipher, 417 const int **nids, int nid) 418 { 419 int ok = 1; 420 if (!cipher) { 421 /* We are returning a list of supported nids */ 422 *nids = ossltest_cipher_nids; 423 return (sizeof(ossltest_cipher_nids) - 1) 424 / sizeof(ossltest_cipher_nids[0]); 425 } 426 /* We are being asked for a specific cipher */ 427 switch (nid) { 428 case NID_aes_128_cbc: 429 *cipher = ossltest_aes_128_cbc(); 430 break; 431 case NID_aes_128_gcm: 432 *cipher = ossltest_aes_128_gcm(); 433 break; 434 default: 435 ok = 0; 436 *cipher = NULL; 437 break; 438 } 439 return ok; 440 } 441 442 static void fill_known_data(unsigned char *md, unsigned int len) 443 { 444 unsigned int i; 445 446 for (i=0; i<len; i++) { 447 md[i] = (unsigned char)(i & 0xff); 448 } 449 } 450 451 /* 452 * MD5 implementation. We go through the motions of doing MD5 by deferring to 453 * the standard implementation. Then we overwrite the result with a will defined 454 * value, so that all "MD5" digests using the test engine always end up with 455 * the same value. 456 */ 457 #undef data 458 #define data(ctx) ((MD5_CTX *)EVP_MD_CTX_md_data(ctx)) 459 static int digest_md5_init(EVP_MD_CTX *ctx) 460 { 461 return MD5_Init(data(ctx)); 462 } 463 464 static int digest_md5_update(EVP_MD_CTX *ctx, const void *data, 465 size_t count) 466 { 467 return MD5_Update(data(ctx), data, (size_t)count); 468 } 469 470 static int digest_md5_final(EVP_MD_CTX *ctx, unsigned char *md) 471 { 472 int ret; 473 ret = MD5_Final(md, data(ctx)); 474 475 if (ret > 0) { 476 fill_known_data(md, MD5_DIGEST_LENGTH); 477 } 478 return ret; 479 } 480 481 /* 482 * SHA1 implementation. 483 */ 484 #undef data 485 #define data(ctx) ((SHA_CTX *)EVP_MD_CTX_md_data(ctx)) 486 static int digest_sha1_init(EVP_MD_CTX *ctx) 487 { 488 return SHA1_Init(data(ctx)); 489 } 490 491 static int digest_sha1_update(EVP_MD_CTX *ctx, const void *data, 492 size_t count) 493 { 494 return SHA1_Update(data(ctx), data, (size_t)count); 495 } 496 497 static int digest_sha1_final(EVP_MD_CTX *ctx, unsigned char *md) 498 { 499 int ret; 500 ret = SHA1_Final(md, data(ctx)); 501 502 if (ret > 0) { 503 fill_known_data(md, SHA_DIGEST_LENGTH); 504 } 505 return ret; 506 } 507 508 /* 509 * SHA256 implementation. 510 */ 511 #undef data 512 #define data(ctx) ((SHA256_CTX *)EVP_MD_CTX_md_data(ctx)) 513 static int digest_sha256_init(EVP_MD_CTX *ctx) 514 { 515 return SHA256_Init(data(ctx)); 516 } 517 518 static int digest_sha256_update(EVP_MD_CTX *ctx, const void *data, 519 size_t count) 520 { 521 return SHA256_Update(data(ctx), data, (size_t)count); 522 } 523 524 static int digest_sha256_final(EVP_MD_CTX *ctx, unsigned char *md) 525 { 526 int ret; 527 ret = SHA256_Final(md, data(ctx)); 528 529 if (ret > 0) { 530 fill_known_data(md, SHA256_DIGEST_LENGTH); 531 } 532 return ret; 533 } 534 535 /* 536 * SHA384/512 implementation. 537 */ 538 #undef data 539 #define data(ctx) ((SHA512_CTX *)EVP_MD_CTX_md_data(ctx)) 540 static int digest_sha384_init(EVP_MD_CTX *ctx) 541 { 542 return SHA384_Init(data(ctx)); 543 } 544 545 static int digest_sha512_init(EVP_MD_CTX *ctx) 546 { 547 return SHA512_Init(data(ctx)); 548 } 549 550 static int digest_sha512_update(EVP_MD_CTX *ctx, const void *data, 551 size_t count) 552 { 553 return SHA512_Update(data(ctx), data, (size_t)count); 554 } 555 556 static int digest_sha384_final(EVP_MD_CTX *ctx, unsigned char *md) 557 { 558 int ret; 559 /* Actually uses SHA512_Final! */ 560 ret = SHA512_Final(md, data(ctx)); 561 562 if (ret > 0) { 563 fill_known_data(md, SHA384_DIGEST_LENGTH); 564 } 565 return ret; 566 } 567 568 static int digest_sha512_final(EVP_MD_CTX *ctx, unsigned char *md) 569 { 570 int ret; 571 ret = SHA512_Final(md, data(ctx)); 572 573 if (ret > 0) { 574 fill_known_data(md, SHA512_DIGEST_LENGTH); 575 } 576 return ret; 577 } 578 579 /* 580 * AES128 Implementation 581 */ 582 583 int ossltest_aes128_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 584 const unsigned char *iv, int enc) 585 { 586 return EVP_CIPHER_meth_get_init(EVP_aes_128_cbc()) (ctx, key, iv, enc); 587 } 588 589 int ossltest_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 590 const unsigned char *in, size_t inl) 591 { 592 unsigned char *tmpbuf; 593 int ret; 594 595 tmpbuf = OPENSSL_malloc(inl); 596 597 /* OPENSSL_malloc will return NULL if inl == 0 */ 598 if (tmpbuf == NULL && inl > 0) 599 return -1; 600 601 /* Remember what we were asked to encrypt */ 602 if (tmpbuf != NULL) 603 memcpy(tmpbuf, in, inl); 604 605 /* Go through the motions of encrypting it */ 606 ret = EVP_CIPHER_meth_get_do_cipher(EVP_aes_128_cbc())(ctx, out, in, inl); 607 608 /* Throw it all away and just use the plaintext as the output */ 609 if (tmpbuf != NULL) 610 memcpy(out, tmpbuf, inl); 611 OPENSSL_free(tmpbuf); 612 613 return ret; 614 } 615 616 int ossltest_aes128_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 617 const unsigned char *iv, int enc) 618 { 619 return EVP_CIPHER_meth_get_init(EVP_aes_128_gcm()) (ctx, key, iv, enc); 620 } 621 622 623 int ossltest_aes128_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 624 const unsigned char *in, size_t inl) 625 { 626 unsigned char *tmpbuf = OPENSSL_malloc(inl); 627 628 /* OPENSSL_malloc will return NULL if inl == 0 */ 629 if (tmpbuf == NULL && inl > 0) 630 return -1; 631 632 /* Remember what we were asked to encrypt */ 633 if (tmpbuf != NULL) 634 memcpy(tmpbuf, in, inl); 635 636 /* Go through the motions of encrypting it */ 637 EVP_CIPHER_meth_get_do_cipher(EVP_aes_128_gcm())(ctx, out, in, inl); 638 639 /* Throw it all away and just use the plaintext as the output */ 640 if (tmpbuf != NULL && out != NULL) 641 memcpy(out, tmpbuf, inl); 642 OPENSSL_free(tmpbuf); 643 644 return inl; 645 } 646 647 static int ossltest_aes128_gcm_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, 648 void *ptr) 649 { 650 /* Pass the ctrl down */ 651 int ret = EVP_CIPHER_meth_get_ctrl(EVP_aes_128_gcm())(ctx, type, arg, ptr); 652 653 if (ret <= 0) 654 return ret; 655 656 switch(type) { 657 case EVP_CTRL_AEAD_GET_TAG: 658 /* Always give the same tag */ 659 memset(ptr, 0, EVP_GCM_TLS_TAG_LEN); 660 break; 661 662 default: 663 break; 664 } 665 666 return 1; 667 } 668 669 static int ossltest_rand_bytes(unsigned char *buf, int num) 670 { 671 unsigned char val = 1; 672 673 while (--num >= 0) 674 *buf++ = val++; 675 return 1; 676 } 677 678 static int ossltest_rand_status(void) 679 { 680 return 1; 681 } 682 683 static const RAND_METHOD *ossltest_rand_method(void) 684 { 685 686 static RAND_METHOD osslt_rand_meth = { 687 NULL, 688 ossltest_rand_bytes, 689 NULL, 690 NULL, 691 ossltest_rand_bytes, 692 ossltest_rand_status 693 }; 694 695 return &osslt_rand_meth; 696 } 697
Indexes created Sat Feb 28 05:31:39 UTC 2026