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| 1 /* | |
| 2 * crypto_kernel.c | |
| 3 * | |
| 4 * header for the cryptographic kernel | |
| 5 * | |
| 6 * David A. McGrew | |
| 7 * Cisco Systems, Inc. | |
| 8 */ | |
| 9 /* | |
| 10 * | |
| 11 * Copyright(c) 2001-2006,2013 Cisco Systems, Inc. | |
| 12 * All rights reserved. | |
| 13 * | |
| 14 * Redistribution and use in source and binary forms, with or without | |
| 15 * modification, are permitted provided that the following conditions | |
| 16 * are met: | |
| 17 * | |
| 18 * Redistributions of source code must retain the above copyright | |
| 19 * notice, this list of conditions and the following disclaimer. | |
| 20 * | |
| 21 * Redistributions in binary form must reproduce the above | |
| 22 * copyright notice, this list of conditions and the following | |
| 23 * disclaimer in the documentation and/or other materials provided | |
| 24 * with the distribution. | |
| 25 * | |
| 26 * Neither the name of the Cisco Systems, Inc. nor the names of its | |
| 27 * contributors may be used to endorse or promote products derived | |
| 28 * from this software without specific prior written permission. | |
| 29 * | |
| 30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
| 33 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
| 34 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
| 35 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 36 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
| 37 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 41 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 42 * | |
| 43 */ | |
| 44 | |
| 45 | |
| 46 #ifdef HAVE_CONFIG_H | |
| 47 #include <config.h> | |
| 48 #endif | |
| 49 | |
| 50 #include "alloc.h" | |
| 51 | |
| 52 #include "crypto_kernel.h" | |
| 53 | |
| 54 /* the debug module for the crypto_kernel */ | |
| 55 | |
| 56 debug_module_t mod_crypto_kernel = { | |
| 57 0, /* debugging is off by default */ | |
| 58 "crypto kernel" /* printable name for module */ | |
| 59 }; | |
| 60 | |
| 61 /* | |
| 62 * other debug modules that can be included in the kernel | |
| 63 */ | |
| 64 | |
| 65 extern debug_module_t mod_auth; | |
| 66 extern debug_module_t mod_cipher; | |
| 67 extern debug_module_t mod_stat; | |
| 68 extern debug_module_t mod_alloc; | |
| 69 | |
| 70 /* | |
| 71 * cipher types that can be included in the kernel | |
| 72 */ | |
| 73 | |
| 74 extern cipher_type_t null_cipher; | |
| 75 extern cipher_type_t aes_icm; | |
| 76 #ifndef OPENSSL | |
| 77 extern cipher_type_t aes_cbc; | |
| 78 #else | |
| 79 #ifndef SRTP_NO_AES192 | |
| 80 extern cipher_type_t aes_icm_192; | |
| 81 #endif | |
| 82 extern cipher_type_t aes_icm_256; | |
| 83 extern cipher_type_t aes_gcm_128_openssl; | |
| 84 extern cipher_type_t aes_gcm_256_openssl; | |
| 85 #endif | |
| 86 | |
| 87 | |
| 88 /* | |
| 89 * auth func types that can be included in the kernel | |
| 90 */ | |
| 91 | |
| 92 extern auth_type_t null_auth; | |
| 93 extern auth_type_t hmac; | |
| 94 | |
| 95 /* crypto_kernel is a global variable, the only one of its datatype */ | |
| 96 | |
| 97 crypto_kernel_t | |
| 98 crypto_kernel = { | |
| 99 crypto_kernel_state_insecure, /* start off in insecure state */ | |
| 100 NULL, /* no cipher types yet */ | |
| 101 NULL, /* no auth types yet */ | |
| 102 NULL /* no debug modules yet */ | |
| 103 }; | |
| 104 | |
| 105 #define MAX_RNG_TRIALS 25 | |
| 106 | |
| 107 err_status_t | |
| 108 crypto_kernel_init() { | |
| 109 err_status_t status; | |
| 110 | |
| 111 /* check the security state */ | |
| 112 if (crypto_kernel.state == crypto_kernel_state_secure) { | |
| 113 | |
| 114 /* | |
| 115 * we're already in the secure state, but we've been asked to | |
| 116 * re-initialize, so we just re-run the self-tests and then return | |
| 117 */ | |
| 118 return crypto_kernel_status(); | |
| 119 } | |
| 120 | |
| 121 /* initialize error reporting system */ | |
| 122 status = err_reporting_init("crypto"); | |
| 123 if (status) | |
| 124 return status; | |
| 125 | |
| 126 /* load debug modules */ | |
| 127 status = crypto_kernel_load_debug_module(&mod_crypto_kernel); | |
| 128 if (status) | |
| 129 return status; | |
| 130 status = crypto_kernel_load_debug_module(&mod_auth); | |
| 131 if (status) | |
| 132 return status; | |
| 133 status = crypto_kernel_load_debug_module(&mod_cipher); | |
| 134 if (status) | |
| 135 return status; | |
| 136 status = crypto_kernel_load_debug_module(&mod_stat); | |
| 137 if (status) | |
| 138 return status; | |
| 139 status = crypto_kernel_load_debug_module(&mod_alloc); | |
| 140 if (status) | |
| 141 return status; | |
| 142 | |
| 143 /* initialize random number generator */ | |
| 144 status = rand_source_init(); | |
| 145 if (status) | |
| 146 return status; | |
| 147 | |
| 148 /* run FIPS-140 statistical tests on rand_source */ | |
| 149 status = stat_test_rand_source_with_repetition(rand_source_get_octet_string, M
AX_RNG_TRIALS); | |
| 150 if (status) | |
| 151 return status; | |
| 152 | |
| 153 #ifndef OPENSSL | |
| 154 /* initialize pseudorandom number generator */ | |
| 155 status = ctr_prng_init(rand_source_get_octet_string); | |
| 156 if (status) | |
| 157 return status; | |
| 158 | |
| 159 /* run FIPS-140 statistical tests on ctr_prng */ | |
| 160 status = stat_test_rand_source_with_repetition(ctr_prng_get_octet_string, MAX_
RNG_TRIALS); | |
| 161 if (status) | |
| 162 return status; | |
| 163 #endif | |
| 164 | |
| 165 /* load cipher types */ | |
| 166 status = crypto_kernel_load_cipher_type(&null_cipher, NULL_CIPHER); | |
| 167 if (status) | |
| 168 return status; | |
| 169 status = crypto_kernel_load_cipher_type(&aes_icm, AES_ICM); | |
| 170 if (status) | |
| 171 return status; | |
| 172 #ifndef OPENSSL | |
| 173 status = crypto_kernel_load_cipher_type(&aes_cbc, AES_CBC); | |
| 174 if (status) | |
| 175 return status; | |
| 176 #else | |
| 177 #ifndef SRTP_NO_AES192 | |
| 178 status = crypto_kernel_load_cipher_type(&aes_icm_192, AES_192_ICM); | |
| 179 if (status) { | |
| 180 return status; | |
| 181 } | |
| 182 #endif | |
| 183 status = crypto_kernel_load_cipher_type(&aes_icm_256, AES_256_ICM); | |
| 184 if (status) { | |
| 185 return status; | |
| 186 } | |
| 187 status = crypto_kernel_load_cipher_type(&aes_gcm_128_openssl, AES_128_GCM); | |
| 188 if (status) { | |
| 189 return status; | |
| 190 } | |
| 191 status = crypto_kernel_load_cipher_type(&aes_gcm_256_openssl, AES_256_GCM); | |
| 192 if (status) { | |
| 193 return status; | |
| 194 } | |
| 195 #endif | |
| 196 | |
| 197 /* load auth func types */ | |
| 198 status = crypto_kernel_load_auth_type(&null_auth, NULL_AUTH); | |
| 199 if (status) | |
| 200 return status; | |
| 201 status = crypto_kernel_load_auth_type(&hmac, HMAC_SHA1); | |
| 202 if (status) | |
| 203 return status; | |
| 204 | |
| 205 /* change state to secure */ | |
| 206 crypto_kernel.state = crypto_kernel_state_secure; | |
| 207 | |
| 208 return err_status_ok; | |
| 209 } | |
| 210 | |
| 211 err_status_t | |
| 212 crypto_kernel_status() { | |
| 213 err_status_t status; | |
| 214 kernel_cipher_type_t *ctype = crypto_kernel.cipher_type_list; | |
| 215 kernel_auth_type_t *atype = crypto_kernel.auth_type_list; | |
| 216 kernel_debug_module_t *dm = crypto_kernel.debug_module_list; | |
| 217 | |
| 218 /* run FIPS-140 statistical tests on rand_source */ | |
| 219 printf("testing rand_source..."); | |
| 220 status = stat_test_rand_source_with_repetition(rand_source_get_octet_string, M
AX_RNG_TRIALS); | |
| 221 if (status) { | |
| 222 printf("failed\n"); | |
| 223 crypto_kernel.state = crypto_kernel_state_insecure; | |
| 224 return status; | |
| 225 } | |
| 226 printf("passed\n"); | |
| 227 | |
| 228 /* for each cipher type, describe and test */ | |
| 229 while(ctype != NULL) { | |
| 230 printf("cipher: %s\n", ctype->cipher_type->description); | |
| 231 printf(" instance count: %d\n", ctype->cipher_type->ref_count); | |
| 232 printf(" self-test: "); | |
| 233 status = cipher_type_self_test(ctype->cipher_type); | |
| 234 if (status) { | |
| 235 printf("failed with error code %d\n", status); | |
| 236 exit(status); | |
| 237 } | |
| 238 printf("passed\n"); | |
| 239 ctype = ctype->next; | |
| 240 } | |
| 241 | |
| 242 /* for each auth type, describe and test */ | |
| 243 while(atype != NULL) { | |
| 244 printf("auth func: %s\n", atype->auth_type->description); | |
| 245 printf(" instance count: %d\n", atype->auth_type->ref_count); | |
| 246 printf(" self-test: "); | |
| 247 status = auth_type_self_test(atype->auth_type); | |
| 248 if (status) { | |
| 249 printf("failed with error code %d\n", status); | |
| 250 exit(status); | |
| 251 } | |
| 252 printf("passed\n"); | |
| 253 atype = atype->next; | |
| 254 } | |
| 255 | |
| 256 /* describe each debug module */ | |
| 257 printf("debug modules loaded:\n"); | |
| 258 while (dm != NULL) { | |
| 259 printf(" %s ", dm->mod->name); | |
| 260 if (dm->mod->on) | |
| 261 printf("(on)\n"); | |
| 262 else | |
| 263 printf("(off)\n"); | |
| 264 dm = dm->next; | |
| 265 } | |
| 266 | |
| 267 return err_status_ok; | |
| 268 } | |
| 269 | |
| 270 err_status_t | |
| 271 crypto_kernel_list_debug_modules() { | |
| 272 kernel_debug_module_t *dm = crypto_kernel.debug_module_list; | |
| 273 | |
| 274 /* describe each debug module */ | |
| 275 printf("debug modules loaded:\n"); | |
| 276 while (dm != NULL) { | |
| 277 printf(" %s ", dm->mod->name); | |
| 278 if (dm->mod->on) | |
| 279 printf("(on)\n"); | |
| 280 else | |
| 281 printf("(off)\n"); | |
| 282 dm = dm->next; | |
| 283 } | |
| 284 | |
| 285 return err_status_ok; | |
| 286 } | |
| 287 | |
| 288 err_status_t | |
| 289 crypto_kernel_shutdown() { | |
| 290 err_status_t status; | |
| 291 | |
| 292 /* | |
| 293 * free dynamic memory used in crypto_kernel at present | |
| 294 */ | |
| 295 | |
| 296 /* walk down cipher type list, freeing memory */ | |
| 297 while (crypto_kernel.cipher_type_list != NULL) { | |
| 298 kernel_cipher_type_t *ctype = crypto_kernel.cipher_type_list; | |
| 299 crypto_kernel.cipher_type_list = ctype->next; | |
| 300 debug_print(mod_crypto_kernel, | |
| 301 "freeing memory for cipher %s", | |
| 302 ctype->cipher_type->description); | |
| 303 crypto_free(ctype); | |
| 304 } | |
| 305 | |
| 306 /* walk down authetication module list, freeing memory */ | |
| 307 while (crypto_kernel.auth_type_list != NULL) { | |
| 308 kernel_auth_type_t *atype = crypto_kernel.auth_type_list; | |
| 309 crypto_kernel.auth_type_list = atype->next; | |
| 310 debug_print(mod_crypto_kernel, | |
| 311 "freeing memory for authentication %s", | |
| 312 atype->auth_type->description); | |
| 313 crypto_free(atype); | |
| 314 } | |
| 315 | |
| 316 /* walk down debug module list, freeing memory */ | |
| 317 while (crypto_kernel.debug_module_list != NULL) { | |
| 318 kernel_debug_module_t *kdm = crypto_kernel.debug_module_list; | |
| 319 crypto_kernel.debug_module_list = kdm->next; | |
| 320 debug_print(mod_crypto_kernel, | |
| 321 "freeing memory for debug module %s", | |
| 322 kdm->mod->name); | |
| 323 crypto_free(kdm); | |
| 324 } | |
| 325 | |
| 326 /* de-initialize random number generator */ status = rand_source_deinit(); | |
| 327 if (status) | |
| 328 return status; | |
| 329 | |
| 330 /* return to insecure state */ | |
| 331 crypto_kernel.state = crypto_kernel_state_insecure; | |
| 332 | |
| 333 return err_status_ok; | |
| 334 } | |
| 335 | |
| 336 static inline err_status_t | |
| 337 crypto_kernel_do_load_cipher_type(cipher_type_t *new_ct, cipher_type_id_t id, | |
| 338 int replace) { | |
| 339 kernel_cipher_type_t *ctype, *new_ctype; | |
| 340 err_status_t status; | |
| 341 | |
| 342 /* defensive coding */ | |
| 343 if (new_ct == NULL) | |
| 344 return err_status_bad_param; | |
| 345 | |
| 346 if (new_ct->id != id) | |
| 347 return err_status_bad_param; | |
| 348 | |
| 349 /* check cipher type by running self-test */ | |
| 350 status = cipher_type_self_test(new_ct); | |
| 351 if (status) { | |
| 352 return status; | |
| 353 } | |
| 354 | |
| 355 /* walk down list, checking if this type is in the list already */ | |
| 356 ctype = crypto_kernel.cipher_type_list; | |
| 357 while (ctype != NULL) { | |
| 358 if (id == ctype->id) { | |
| 359 if (!replace) | |
| 360 return err_status_bad_param; | |
| 361 status = cipher_type_test(new_ct, ctype->cipher_type->test_data); | |
| 362 if (status) | |
| 363 return status; | |
| 364 new_ctype = ctype; | |
| 365 break; | |
| 366 } | |
| 367 else if (new_ct == ctype->cipher_type) | |
| 368 return err_status_bad_param; | |
| 369 ctype = ctype->next; | |
| 370 } | |
| 371 | |
| 372 /* if not found, put new_ct at the head of the list */ | |
| 373 if (ctype == NULL) { | |
| 374 /* allocate memory */ | |
| 375 new_ctype = (kernel_cipher_type_t *) crypto_alloc(sizeof(kernel_cipher_type_
t)); | |
| 376 if (new_ctype == NULL) | |
| 377 return err_status_alloc_fail; | |
| 378 new_ctype->next = crypto_kernel.cipher_type_list; | |
| 379 | |
| 380 /* set head of list to new cipher type */ | |
| 381 crypto_kernel.cipher_type_list = new_ctype; | |
| 382 } | |
| 383 | |
| 384 /* set fields */ | |
| 385 new_ctype->cipher_type = new_ct; | |
| 386 new_ctype->id = id; | |
| 387 | |
| 388 /* load debug module, if there is one present */ | |
| 389 if (new_ct->debug != NULL) | |
| 390 crypto_kernel_load_debug_module(new_ct->debug); | |
| 391 /* we could check for errors here */ | |
| 392 | |
| 393 return err_status_ok; | |
| 394 } | |
| 395 | |
| 396 err_status_t | |
| 397 crypto_kernel_load_cipher_type(cipher_type_t *new_ct, cipher_type_id_t id) { | |
| 398 return crypto_kernel_do_load_cipher_type(new_ct, id, 0); | |
| 399 } | |
| 400 | |
| 401 err_status_t | |
| 402 crypto_kernel_replace_cipher_type(cipher_type_t *new_ct, cipher_type_id_t id) { | |
| 403 return crypto_kernel_do_load_cipher_type(new_ct, id, 1); | |
| 404 } | |
| 405 | |
| 406 err_status_t | |
| 407 crypto_kernel_do_load_auth_type(auth_type_t *new_at, auth_type_id_t id, | |
| 408 int replace) { | |
| 409 kernel_auth_type_t *atype, *new_atype; | |
| 410 err_status_t status; | |
| 411 | |
| 412 /* defensive coding */ | |
| 413 if (new_at == NULL) | |
| 414 return err_status_bad_param; | |
| 415 | |
| 416 if (new_at->id != id) | |
| 417 return err_status_bad_param; | |
| 418 | |
| 419 /* check auth type by running self-test */ | |
| 420 status = auth_type_self_test(new_at); | |
| 421 if (status) { | |
| 422 return status; | |
| 423 } | |
| 424 | |
| 425 /* walk down list, checking if this type is in the list already */ | |
| 426 atype = crypto_kernel.auth_type_list; | |
| 427 while (atype != NULL) { | |
| 428 if (id == atype->id) { | |
| 429 if (!replace) | |
| 430 return err_status_bad_param; | |
| 431 status = auth_type_test(new_at, atype->auth_type->test_data); | |
| 432 if (status) | |
| 433 return status; | |
| 434 new_atype = atype; | |
| 435 break; | |
| 436 } | |
| 437 else if (new_at == atype->auth_type) | |
| 438 return err_status_bad_param; | |
| 439 atype = atype->next; | |
| 440 } | |
| 441 | |
| 442 /* if not found, put new_at at the head of the list */ | |
| 443 if (atype == NULL) { | |
| 444 /* allocate memory */ | |
| 445 new_atype = (kernel_auth_type_t *)crypto_alloc(sizeof(kernel_auth_type_t)); | |
| 446 if (new_atype == NULL) | |
| 447 return err_status_alloc_fail; | |
| 448 | |
| 449 new_atype->next = crypto_kernel.auth_type_list; | |
| 450 /* set head of list to new auth type */ | |
| 451 crypto_kernel.auth_type_list = new_atype; | |
| 452 } | |
| 453 | |
| 454 /* set fields */ | |
| 455 new_atype->auth_type = new_at; | |
| 456 new_atype->id = id; | |
| 457 | |
| 458 /* load debug module, if there is one present */ | |
| 459 if (new_at->debug != NULL) | |
| 460 crypto_kernel_load_debug_module(new_at->debug); | |
| 461 /* we could check for errors here */ | |
| 462 | |
| 463 return err_status_ok; | |
| 464 | |
| 465 } | |
| 466 | |
| 467 err_status_t | |
| 468 crypto_kernel_load_auth_type(auth_type_t *new_at, auth_type_id_t id) { | |
| 469 return crypto_kernel_do_load_auth_type(new_at, id, 0); | |
| 470 } | |
| 471 | |
| 472 err_status_t | |
| 473 crypto_kernel_replace_auth_type(auth_type_t *new_at, auth_type_id_t id) { | |
| 474 return crypto_kernel_do_load_auth_type(new_at, id, 1); | |
| 475 } | |
| 476 | |
| 477 | |
| 478 cipher_type_t * | |
| 479 crypto_kernel_get_cipher_type(cipher_type_id_t id) { | |
| 480 kernel_cipher_type_t *ctype; | |
| 481 | |
| 482 /* walk down list, looking for id */ | |
| 483 ctype = crypto_kernel.cipher_type_list; | |
| 484 while (ctype != NULL) { | |
| 485 if (id == ctype->id) | |
| 486 return ctype->cipher_type; | |
| 487 ctype = ctype->next; | |
| 488 } | |
| 489 | |
| 490 /* haven't found the right one, indicate failure by returning NULL */ | |
| 491 return NULL; | |
| 492 } | |
| 493 | |
| 494 | |
| 495 err_status_t | |
| 496 crypto_kernel_alloc_cipher(cipher_type_id_t id, | |
| 497 cipher_pointer_t *cp, | |
| 498 int key_len, | |
| 499 int tag_len) { | |
| 500 cipher_type_t *ct; | |
| 501 | |
| 502 /* | |
| 503 * if the crypto_kernel is not yet initialized, we refuse to allocate | |
| 504 * any ciphers - this is a bit extra-paranoid | |
| 505 */ | |
| 506 if (crypto_kernel.state != crypto_kernel_state_secure) | |
| 507 return err_status_init_fail; | |
| 508 | |
| 509 ct = crypto_kernel_get_cipher_type(id); | |
| 510 if (!ct) | |
| 511 return err_status_fail; | |
| 512 | |
| 513 return ((ct)->alloc(cp, key_len, tag_len)); | |
| 514 } | |
| 515 | |
| 516 | |
| 517 | |
| 518 auth_type_t * | |
| 519 crypto_kernel_get_auth_type(auth_type_id_t id) { | |
| 520 kernel_auth_type_t *atype; | |
| 521 | |
| 522 /* walk down list, looking for id */ | |
| 523 atype = crypto_kernel.auth_type_list; | |
| 524 while (atype != NULL) { | |
| 525 if (id == atype->id) | |
| 526 return atype->auth_type; | |
| 527 atype = atype->next; | |
| 528 } | |
| 529 | |
| 530 /* haven't found the right one, indicate failure by returning NULL */ | |
| 531 return NULL; | |
| 532 } | |
| 533 | |
| 534 err_status_t | |
| 535 crypto_kernel_alloc_auth(auth_type_id_t id, | |
| 536 auth_pointer_t *ap, | |
| 537 int key_len, | |
| 538 int tag_len) { | |
| 539 auth_type_t *at; | |
| 540 | |
| 541 /* | |
| 542 * if the crypto_kernel is not yet initialized, we refuse to allocate | |
| 543 * any auth functions - this is a bit extra-paranoid | |
| 544 */ | |
| 545 if (crypto_kernel.state != crypto_kernel_state_secure) | |
| 546 return err_status_init_fail; | |
| 547 | |
| 548 at = crypto_kernel_get_auth_type(id); | |
| 549 if (!at) | |
| 550 return err_status_fail; | |
| 551 | |
| 552 return ((at)->alloc(ap, key_len, tag_len)); | |
| 553 } | |
| 554 | |
| 555 err_status_t | |
| 556 crypto_kernel_load_debug_module(debug_module_t *new_dm) { | |
| 557 kernel_debug_module_t *kdm, *new; | |
| 558 | |
| 559 /* defensive coding */ | |
| 560 if (new_dm == NULL) | |
| 561 return err_status_bad_param; | |
| 562 | |
| 563 /* walk down list, checking if this type is in the list already */ | |
| 564 kdm = crypto_kernel.debug_module_list; | |
| 565 while (kdm != NULL) { | |
| 566 if (strncmp(new_dm->name, kdm->mod->name, 64) == 0) | |
| 567 return err_status_bad_param; | |
| 568 kdm = kdm->next; | |
| 569 } | |
| 570 | |
| 571 /* put new_dm at the head of the list */ | |
| 572 /* allocate memory */ | |
| 573 new = (kernel_debug_module_t *)crypto_alloc(sizeof(kernel_debug_module_t)); | |
| 574 if (new == NULL) | |
| 575 return err_status_alloc_fail; | |
| 576 | |
| 577 /* set fields */ | |
| 578 new->mod = new_dm; | |
| 579 new->next = crypto_kernel.debug_module_list; | |
| 580 | |
| 581 /* set head of list to new cipher type */ | |
| 582 crypto_kernel.debug_module_list = new; | |
| 583 | |
| 584 return err_status_ok; | |
| 585 } | |
| 586 | |
| 587 err_status_t | |
| 588 crypto_kernel_set_debug_module(char *name, int on) { | |
| 589 kernel_debug_module_t *kdm; | |
| 590 | |
| 591 /* walk down list, checking if this type is in the list already */ | |
| 592 kdm = crypto_kernel.debug_module_list; | |
| 593 while (kdm != NULL) { | |
| 594 if (strncmp(name, kdm->mod->name, 64) == 0) { | |
| 595 kdm->mod->on = on; | |
| 596 return err_status_ok; | |
| 597 } | |
| 598 kdm = kdm->next; | |
| 599 } | |
| 600 | |
| 601 return err_status_fail; | |
| 602 } | |
| 603 | |
| 604 err_status_t | |
| 605 crypto_get_random(unsigned char *buffer, unsigned int length) { | |
| 606 if (crypto_kernel.state == crypto_kernel_state_secure) | |
| 607 #ifdef OPENSSL | |
| 608 return rand_source_get_octet_string(buffer, length); | |
| 609 #else | |
| 610 return ctr_prng_get_octet_string(buffer, length); | |
| 611 #endif | |
| 612 else | |
| 613 return err_status_fail; | |
| 614 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2344973002:
Update libsrtp to version 2.0 (Closed)
