Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* |
| 2 | * srtp_driver.c |
| 3 | * |
| 4 | * a test driver for libSRTP |
| 5 | * |
| 6 | * David A. McGrew |
| 7 | * Cisco Systems, Inc. |
| 8 | */ |
| 9 | /* |
| 10 | * |
| 11 | * Copyright (c) 2001-2006, 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 | #include <string.h> /* for memcpy() */ |
| 47 | #include <time.h> /* for clock() */ |
| 48 | #include <stdlib.h> /* for malloc(), free() */ |
| 49 | #include <stdio.h> /* for print(), fflush() */ |
| 50 | #include "getopt_s.h" /* for local getopt() */ |
| 51 | |
| 52 | #include "srtp_priv.h" |
| 53 | |
| 54 | #ifdef HAVE_NETINET_IN_H |
| 55 | # include <netinet/in.h> |
| 56 | #elif defined HAVE_WINSOCK2_H |
| 57 | # include <winsock2.h> |
| 58 | #endif |
| 59 | |
| 60 | #define PRINT_REFERENCE_PACKET 1 |
| 61 | |
| 62 | err_status_t |
| 63 | srtp_validate(void); |
| 64 | |
| 65 | err_status_t |
| 66 | srtp_create_big_policy(srtp_policy_t **list); |
| 67 | |
| 68 | err_status_t |
| 69 | srtp_test_remove_stream(void); |
| 70 | |
| 71 | double |
| 72 | srtp_bits_per_second(int msg_len_octets, const srtp_policy_t *policy); |
| 73 | |
| 74 | double |
| 75 | srtp_rejections_per_second(int msg_len_octets, const srtp_policy_t *policy); |
| 76 | |
| 77 | void |
| 78 | srtp_do_timing(const srtp_policy_t *policy); |
| 79 | |
| 80 | void |
| 81 | srtp_do_rejection_timing(const srtp_policy_t *policy); |
| 82 | |
| 83 | err_status_t |
| 84 | srtp_test(const srtp_policy_t *policy); |
| 85 | |
| 86 | err_status_t |
| 87 | srtcp_test(const srtp_policy_t *policy); |
| 88 | |
| 89 | err_status_t |
| 90 | srtp_session_print_policy(srtp_t srtp); |
| 91 | |
| 92 | err_status_t |
| 93 | srtp_print_policy(const srtp_policy_t *policy); |
| 94 | |
| 95 | char * |
| 96 | srtp_packet_to_string(srtp_hdr_t *hdr, int packet_len); |
| 97 | |
| 98 | double |
| 99 | mips_estimate(int num_trials, int *ignore); |
| 100 | |
| 101 | extern uint8_t test_key[30]; |
| 102 | |
| 103 | void |
| 104 | usage(char *prog_name) { |
| 105 | printf("usage: %s [ -t ][ -c ][ -v ][-d <debug_module> ]* [ -l ]\n" |
| 106 | " -t run timing test\n" |
| 107 | " -r run rejection timing test\n" |
| 108 | " -c run codec timing test\n" |
| 109 | " -v run validation tests\n" |
| 110 | " -d <mod> turn on debugging module <mod>\n" |
| 111 | " -l list debugging modules\n", prog_name); |
| 112 | exit(1); |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | * The policy_array is a null-terminated array of policy structs. it |
| 117 | * is declared at the end of this file |
| 118 | */ |
| 119 | |
| 120 | extern const srtp_policy_t *policy_array[]; |
| 121 | |
| 122 | |
| 123 | /* the wildcard_policy is declared below; it has a wildcard ssrc */ |
| 124 | |
| 125 | extern const srtp_policy_t wildcard_policy; |
| 126 | |
| 127 | /* |
| 128 | * mod_driver debug module - debugging module for this test driver |
| 129 | * |
| 130 | * we use the crypto_kernel debugging system in this driver, which |
| 131 | * makes the interface uniform and increases portability |
| 132 | */ |
| 133 | |
| 134 | debug_module_t mod_driver = { |
| 135 | 0, /* debugging is off by default */ |
| 136 | "driver" /* printable name for module */ |
| 137 | }; |
| 138 | |
| 139 | int |
| 140 | main (int argc, char *argv[]) { |
| 141 | char q; |
| 142 | unsigned do_timing_test = 0; |
| 143 | unsigned do_rejection_test = 0; |
| 144 | unsigned do_codec_timing = 0; |
| 145 | unsigned do_validation = 0; |
| 146 | unsigned do_list_mods = 0; |
| 147 | err_status_t status; |
| 148 | |
| 149 | /* |
| 150 | * verify that the compiler has interpreted the header data |
| 151 | * structure srtp_hdr_t correctly |
| 152 | */ |
| 153 | if (sizeof(srtp_hdr_t) != 12) { |
| 154 | printf("error: srtp_hdr_t has incorrect size" |
| 155 | "(size is %ld bytes, expected 12)\n", |
| 156 | sizeof(srtp_hdr_t)); |
| 157 | exit(1); |
| 158 | } |
| 159 | |
| 160 | /* initialize srtp library */ |
| 161 | status = srtp_init(); |
| 162 | if (status) { |
| 163 | printf("error: srtp init failed with error code %d\n", status); |
| 164 | exit(1); |
| 165 | } |
| 166 | |
| 167 | /* load srtp_driver debug module */ |
| 168 | status = crypto_kernel_load_debug_module(&mod_driver); |
| 169 | if (status) { |
| 170 | printf("error: load of srtp_driver debug module failed " |
| 171 | "with error code %d\n", status); |
| 172 | exit(1); |
| 173 | } |
| 174 | |
| 175 | /* process input arguments */ |
| 176 | while (1) { |
| 177 | q = getopt_s(argc, argv, "trcvld:"); |
| 178 | if (q == -1) |
| 179 | break; |
| 180 | switch (q) { |
| 181 | case 't': |
| 182 | do_timing_test = 1; |
| 183 | break; |
| 184 | case 'r': |
| 185 | do_rejection_test = 1; |
| 186 | break; |
| 187 | case 'c': |
| 188 | do_codec_timing = 1; |
| 189 | break; |
| 190 | case 'v': |
| 191 | do_validation = 1; |
| 192 | break; |
| 193 | case 'l': |
| 194 | do_list_mods = 1; |
| 195 | break; |
| 196 | case 'd': |
| 197 | status = crypto_kernel_set_debug_module(optarg_s, 1); |
| 198 | if (status) { |
| 199 | printf("error: set debug module (%s) failed\n", optarg_s); |
| 200 | exit(1); |
| 201 | } |
| 202 | break; |
| 203 | default: |
| 204 | usage(argv[0]); |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | if (!do_validation && !do_timing_test && !do_codec_timing |
| 209 | && !do_list_mods && !do_rejection_test) |
| 210 | usage(argv[0]); |
| 211 | |
| 212 | if (do_list_mods) { |
| 213 | status = crypto_kernel_list_debug_modules(); |
| 214 | if (status) { |
| 215 | printf("error: list of debug modules failed\n"); |
| 216 | exit(1); |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | if (do_validation) { |
| 221 | const srtp_policy_t **policy = policy_array; |
| 222 | srtp_policy_t *big_policy; |
| 223 | |
| 224 | /* loop over policy array, testing srtp and srtcp for each policy */ |
| 225 | while (*policy != NULL) { |
| 226 | printf("testing srtp_protect and srtp_unprotect\n"); |
| 227 | if (srtp_test(*policy) == err_status_ok) |
| 228 | printf("passed\n\n"); |
| 229 | else { |
| 230 | printf("failed\n"); |
| 231 | exit(1); |
| 232 | } |
| 233 | printf("testing srtp_protect_rtcp and srtp_unprotect_rtcp\n"); |
| 234 | if (srtcp_test(*policy) == err_status_ok) |
| 235 | printf("passed\n\n"); |
| 236 | else { |
| 237 | printf("failed\n"); |
| 238 | exit(1); |
| 239 | } |
| 240 | policy++; |
| 241 | } |
| 242 | |
| 243 | /* create a big policy list and run tests on it */ |
| 244 | status = srtp_create_big_policy(&big_policy); |
| 245 | if (status) { |
| 246 | printf("unexpected failure with error code %d\n", status); |
| 247 | exit(1); |
| 248 | } |
| 249 | printf("testing srtp_protect and srtp_unprotect with big policy\n"); |
| 250 | if (srtp_test(big_policy) == err_status_ok) |
| 251 | printf("passed\n\n"); |
| 252 | else { |
| 253 | printf("failed\n"); |
| 254 | exit(1); |
| 255 | } |
| 256 | |
| 257 | /* run test on wildcard policy */ |
| 258 | printf("testing srtp_protect and srtp_unprotect on " |
| 259 | "wildcard ssrc policy\n"); |
| 260 | if (srtp_test(&wildcard_policy) == err_status_ok) |
| 261 | printf("passed\n\n"); |
| 262 | else { |
| 263 | printf("failed\n"); |
| 264 | exit(1); |
| 265 | } |
| 266 | |
| 267 | /* |
| 268 | * run validation test against the reference packets - note |
| 269 | * that this test only covers the default policy |
| 270 | */ |
| 271 | printf("testing srtp_protect and srtp_unprotect against " |
| 272 | "reference packets\n"); |
| 273 | if (srtp_validate() == err_status_ok) |
| 274 | printf("passed\n\n"); |
| 275 | else { |
| 276 | printf("failed\n"); |
| 277 | exit(1); |
| 278 | } |
| 279 | |
| 280 | /* |
| 281 | * test the function srtp_remove_stream() |
| 282 | */ |
| 283 | printf("testing srtp_remove_stream()..."); |
| 284 | if (srtp_test_remove_stream() == err_status_ok) |
| 285 | printf("passed\n"); |
| 286 | else { |
| 287 | printf("failed\n"); |
| 288 | exit(1); |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | if (do_timing_test) { |
| 293 | const srtp_policy_t **policy = policy_array; |
| 294 | |
| 295 | /* loop over policies, run timing test for each */ |
| 296 | while (*policy != NULL) { |
| 297 | srtp_print_policy(*policy); |
| 298 | srtp_do_timing(*policy); |
| 299 | policy++; |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | if (do_rejection_test) { |
| 304 | const srtp_policy_t **policy = policy_array; |
| 305 | |
| 306 | /* loop over policies, run rejection timing test for each */ |
| 307 | while (*policy != NULL) { |
| 308 | srtp_print_policy(*policy); |
| 309 | srtp_do_rejection_timing(*policy); |
| 310 | policy++; |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | if (do_codec_timing) { |
| 315 | srtp_policy_t policy; |
| 316 | int ignore; |
| 317 | double mips = mips_estimate(1000000000, &ignore); |
| 318 | |
| 319 | crypto_policy_set_rtp_default(&policy.rtp); |
| 320 | crypto_policy_set_rtcp_default(&policy.rtcp); |
| 321 | policy.ssrc.type = ssrc_specific; |
| 322 | policy.ssrc.value = 0xdecafbad; |
| 323 | policy.key = test_key; |
| 324 | policy.next = NULL; |
| 325 | |
| 326 | printf("mips estimate: %e\n", mips); |
| 327 | |
| 328 | printf("testing srtp processing time for voice codecs:\n"); |
| 329 | printf("codec\t\tlength (octets)\t\tsrtp instructions/second\n"); |
| 330 | printf("G.711\t\t%d\t\t\t%e\n", 80, |
| 331 | (double) mips * (80 * 8) / |
| 332 | srtp_bits_per_second(80, &policy) / .01 ); |
| 333 | printf("G.711\t\t%d\t\t\t%e\n", 160, |
| 334 | (double) mips * (160 * 8) / |
| 335 | srtp_bits_per_second(160, &policy) / .02); |
| 336 | printf("G.726-32\t%d\t\t\t%e\n", 40, |
| 337 | (double) mips * (40 * 8) / |
| 338 | srtp_bits_per_second(40, &policy) / .01 ); |
| 339 | printf("G.726-32\t%d\t\t\t%e\n", 80, |
| 340 | (double) mips * (80 * 8) / |
| 341 | srtp_bits_per_second(80, &policy) / .02); |
| 342 | printf("G.729\t\t%d\t\t\t%e\n", 10, |
| 343 | (double) mips * (10 * 8) / |
| 344 | srtp_bits_per_second(10, &policy) / .01 ); |
| 345 | printf("G.729\t\t%d\t\t\t%e\n", 20, |
| 346 | (double) mips * (20 * 8) / |
| 347 | srtp_bits_per_second(20, &policy) / .02 ); |
| 348 | printf("Wideband\t%d\t\t\t%e\n", 320, |
| 349 | (double) mips * (320 * 8) / |
| 350 | srtp_bits_per_second(320, &policy) / .01 ); |
| 351 | printf("Wideband\t%d\t\t\t%e\n", 640, |
| 352 | (double) mips * (640 * 8) / |
| 353 | srtp_bits_per_second(640, &policy) / .02 ); |
| 354 | } |
| 355 | |
| 356 | return 0; |
| 357 | } |
| 358 | |
| 359 | |
| 360 | |
| 361 | /* |
| 362 | * srtp_create_test_packet(len, ssrc) returns a pointer to a |
| 363 | * (malloced) example RTP packet whose data field has the length given |
| 364 | * by pkt_octet_len and the SSRC value ssrc. The total length of the |
| 365 | * packet is twelve octets longer, since the header is at the |
| 366 | * beginning. There is room at the end of the packet for a trailer, |
| 367 | * and the four octets following the packet are filled with 0xff |
| 368 | * values to enable testing for overwrites. |
| 369 | * |
| 370 | * note that the location of the test packet can (and should) be |
| 371 | * deallocated with the free() call once it is no longer needed. |
| 372 | */ |
| 373 | |
| 374 | srtp_hdr_t * |
| 375 | srtp_create_test_packet(int pkt_octet_len, uint32_t ssrc) { |
| 376 | int i; |
| 377 | uint8_t *buffer; |
| 378 | srtp_hdr_t *hdr; |
| 379 | int bytes_in_hdr = 12; |
| 380 | |
| 381 | /* allocate memory for test packet */ |
| 382 | hdr = (srtp_hdr_t*) malloc(pkt_octet_len + bytes_in_hdr |
| 383 | + SRTP_MAX_TRAILER_LEN + 4); |
| 384 | if (!hdr) |
| 385 | return NULL; |
| 386 | |
| 387 | hdr->version = 2; /* RTP version two */ |
| 388 | hdr->p = 0; /* no padding needed */ |
| 389 | hdr->x = 0; /* no header extension */ |
| 390 | hdr->cc = 0; /* no CSRCs */ |
| 391 | hdr->m = 0; /* marker bit */ |
| 392 | hdr->pt = 0xf; /* payload type */ |
| 393 | hdr->seq = htons(0x1234); /* sequence number */ |
| 394 | hdr->ts = htonl(0xdecafbad); /* timestamp */ |
| 395 | hdr->ssrc = htonl(ssrc); /* synch. source */ |
| 396 | |
| 397 | buffer = (uint8_t *)hdr; |
| 398 | buffer += bytes_in_hdr; |
| 399 | |
| 400 | /* set RTP data to 0xab */ |
| 401 | for (i=0; i < pkt_octet_len; i++) |
| 402 | *buffer++ = 0xab; |
| 403 | |
| 404 | /* set post-data value to 0xffff to enable overrun checking */ |
| 405 | for (i=0; i < SRTP_MAX_TRAILER_LEN+4; i++) |
| 406 | *buffer++ = 0xff; |
| 407 | |
| 408 | return hdr; |
| 409 | } |
| 410 | |
| 411 | void |
| 412 | srtp_do_timing(const srtp_policy_t *policy) { |
| 413 | int len; |
| 414 | |
| 415 | /* |
| 416 | * note: the output of this function is formatted so that it |
| 417 | * can be used in gnuplot. '#' indicates a comment, and "\r\n" |
| 418 | * terminates a record |
| 419 | */ |
| 420 | |
| 421 | printf("# testing srtp throughput:\r\n"); |
| 422 | printf("# mesg length (octets)\tthroughput (megabits per second)\r\n"); |
| 423 | |
| 424 | for (len=16; len <= 2048; len *= 2) |
| 425 | printf("%d\t\t\t%f\r\n", len, |
| 426 | srtp_bits_per_second(len, policy) / 1.0E6); |
| 427 | |
| 428 | /* these extra linefeeds let gnuplot know that a dataset is done */ |
| 429 | printf("\r\n\r\n"); |
| 430 | |
| 431 | } |
| 432 | |
| 433 | void |
| 434 | srtp_do_rejection_timing(const srtp_policy_t *policy) { |
| 435 | int len; |
| 436 | |
| 437 | /* |
| 438 | * note: the output of this function is formatted so that it |
| 439 | * can be used in gnuplot. '#' indicates a comment, and "\r\n" |
| 440 | * terminates a record |
| 441 | */ |
| 442 | |
| 443 | printf("# testing srtp rejection throughput:\r\n"); |
| 444 | printf("# mesg length (octets)\trejections per second\r\n"); |
| 445 | |
| 446 | for (len=8; len <= 2048; len *= 2) |
| 447 | printf("%d\t\t\t%e\r\n", len, srtp_rejections_per_second(len, policy)); |
| 448 | |
| 449 | /* these extra linefeeds let gnuplot know that a dataset is done */ |
| 450 | printf("\r\n\r\n"); |
| 451 | |
| 452 | } |
| 453 | |
| 454 | |
| 455 | #define MAX_MSG_LEN 1024 |
| 456 | |
| 457 | double |
| 458 | srtp_bits_per_second(int msg_len_octets, const srtp_policy_t *policy) { |
| 459 | srtp_t srtp; |
| 460 | srtp_hdr_t *mesg; |
| 461 | int i; |
| 462 | clock_t timer; |
| 463 | int num_trials = 100000; |
| 464 | int len; |
| 465 | uint32_t ssrc; |
| 466 | err_status_t status; |
| 467 | |
| 468 | /* |
| 469 | * allocate and initialize an srtp session |
| 470 | */ |
| 471 | status = srtp_create(&srtp, policy); |
| 472 | if (status) { |
| 473 | printf("error: srtp_create() failed with error code %d\n", status); |
| 474 | exit(1); |
| 475 | } |
| 476 | |
| 477 | /* |
| 478 | * if the ssrc is unspecified, use a predetermined one |
| 479 | */ |
| 480 | if (policy->ssrc.type != ssrc_specific) { |
| 481 | ssrc = 0xdeadbeef; |
| 482 | } else { |
| 483 | ssrc = policy->ssrc.value; |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * create a test packet |
| 488 | */ |
| 489 | mesg = srtp_create_test_packet(msg_len_octets, ssrc); |
| 490 | if (mesg == NULL) |
| 491 | return 0.0; /* indicate failure by returning zero */ |
| 492 | |
| 493 | timer = clock(); |
| 494 | for (i=0; i < num_trials; i++) { |
| 495 | err_status_t status; |
| 496 | len = msg_len_octets + 12; /* add in rtp header length */ |
| 497 | |
| 498 | /* srtp protect message */ |
| 499 | status = srtp_protect(srtp, mesg, &len); |
| 500 | if (status) { |
| 501 | printf("error: srtp_protect() failed with error code %d\n", status); |
| 502 | exit(1); |
| 503 | } |
| 504 | |
| 505 | /* increment message number */ |
| 506 | mesg->seq = htons(ntohs(mesg->seq) + 1); |
| 507 | |
| 508 | } |
| 509 | timer = clock() - timer; |
| 510 | |
| 511 | free(mesg); |
| 512 | |
| 513 | return (double) (msg_len_octets) * 8 * |
| 514 | num_trials * CLOCKS_PER_SEC / timer; |
| 515 | } |
| 516 | |
| 517 | double |
| 518 | srtp_rejections_per_second(int msg_len_octets, const srtp_policy_t *policy) { |
| 519 | srtp_ctx_t *srtp; |
| 520 | srtp_hdr_t *mesg; |
| 521 | int i; |
| 522 | int len; |
| 523 | clock_t timer; |
| 524 | int num_trials = 1000000; |
| 525 | uint32_t ssrc = policy->ssrc.value; |
| 526 | err_status_t status; |
| 527 | |
| 528 | /* |
| 529 | * allocate and initialize an srtp session |
| 530 | */ |
| 531 | status = srtp_create(&srtp, policy); |
| 532 | if (status) { |
| 533 | printf("error: srtp_create() failed with error code %d\n", status); |
| 534 | exit(1); |
| 535 | } |
| 536 | |
| 537 | mesg = srtp_create_test_packet(msg_len_octets, ssrc); |
| 538 | if (mesg == NULL) |
| 539 | return 0.0; /* indicate failure by returning zero */ |
| 540 | |
| 541 | len = msg_len_octets; |
| 542 | srtp_protect(srtp, (srtp_hdr_t *)mesg, &len); |
| 543 | |
| 544 | timer = clock(); |
| 545 | for (i=0; i < num_trials; i++) { |
| 546 | len = msg_len_octets; |
| 547 | srtp_unprotect(srtp, (srtp_hdr_t *)mesg, &len); |
| 548 | } |
| 549 | timer = clock() - timer; |
| 550 | |
| 551 | free(mesg); |
| 552 | |
| 553 | return (double) num_trials * CLOCKS_PER_SEC / timer; |
| 554 | } |
| 555 | |
| 556 | |
| 557 | void |
| 558 | err_check(err_status_t s) { |
| 559 | if (s == err_status_ok) |
| 560 | return; |
| 561 | else |
| 562 | fprintf(stderr, "error: unexpected srtp failure (code %d)\n", s); |
| 563 | exit (1); |
| 564 | } |
| 565 | |
| 566 | err_status_t |
| 567 | srtp_test(const srtp_policy_t *policy) { |
| 568 | int i; |
| 569 | srtp_t srtp_sender; |
| 570 | srtp_t srtp_rcvr; |
| 571 | err_status_t status = err_status_ok; |
| 572 | srtp_hdr_t *hdr, *hdr2; |
| 573 | uint8_t hdr_enc[64]; |
| 574 | uint8_t *pkt_end; |
| 575 | int msg_len_octets, msg_len_enc; |
| 576 | int len; |
| 577 | int tag_length = policy->rtp.auth_tag_len; |
| 578 | uint32_t ssrc; |
| 579 | srtp_policy_t *rcvr_policy; |
| 580 | |
| 581 | err_check(srtp_create(&srtp_sender, policy)); |
| 582 | |
| 583 | /* print out policy */ |
| 584 | err_check(srtp_session_print_policy(srtp_sender)); |
| 585 | |
| 586 | /* |
| 587 | * initialize data buffer, using the ssrc in the policy unless that |
| 588 | * value is a wildcard, in which case we'll just use an arbitrary |
| 589 | * one |
| 590 | */ |
| 591 | if (policy->ssrc.type != ssrc_specific) |
| 592 | ssrc = 0xdecafbad; |
| 593 | else |
| 594 | ssrc = policy->ssrc.value; |
| 595 | msg_len_octets = 28; |
| 596 | hdr = srtp_create_test_packet(msg_len_octets, ssrc); |
| 597 | |
| 598 | if (hdr == NULL) |
| 599 | return err_status_alloc_fail; |
| 600 | hdr2 = srtp_create_test_packet(msg_len_octets, ssrc); |
| 601 | if (hdr2 == NULL) { |
| 602 | free(hdr); |
| 603 | return err_status_alloc_fail; |
| 604 | } |
| 605 | |
| 606 | /* set message length */ |
| 607 | len = msg_len_octets; |
| 608 | |
| 609 | debug_print(mod_driver, "before protection:\n%s", |
| 610 | srtp_packet_to_string(hdr, len)); |
| 611 | |
| 612 | #if PRINT_REFERENCE_PACKET |
| 613 | debug_print(mod_driver, "reference packet before protection:\n%s", |
| 614 | octet_string_hex_string((uint8_t *)hdr, len)); |
| 615 | #endif |
| 616 | err_check(srtp_protect(srtp_sender, hdr, &len)); |
| 617 | |
| 618 | debug_print(mod_driver, "after protection:\n%s", |
| 619 | srtp_packet_to_string(hdr, len)); |
| 620 | #if PRINT_REFERENCE_PACKET |
| 621 | debug_print(mod_driver, "after protection:\n%s", |
| 622 | octet_string_hex_string((uint8_t *)hdr, len)); |
| 623 | #endif |
| 624 | |
| 625 | /* save protected message and length */ |
| 626 | memcpy(hdr_enc, hdr, len); |
| 627 | msg_len_enc = len; |
| 628 | |
| 629 | /* |
| 630 | * check for overrun of the srtp_protect() function |
| 631 | * |
| 632 | * The packet is followed by a value of 0xfffff; if the value of the |
| 633 | * data following the packet is different, then we know that the |
| 634 | * protect function is overwriting the end of the packet. |
| 635 | */ |
| 636 | pkt_end = (uint8_t *)hdr + sizeof(srtp_hdr_t) |
| 637 | + msg_len_octets + tag_length; |
| 638 | for (i = 0; i < 4; i++) |
| 639 | if (pkt_end[i] != 0xff) { |
| 640 | fprintf(stdout, "overwrite in srtp_protect() function " |
| 641 | "(expected %x, found %x in trailing octet %d)\n", |
| 642 | 0xff, ((uint8_t *)hdr)[i], i); |
| 643 | free(hdr); |
| 644 | free(hdr2); |
| 645 | return err_status_algo_fail; |
| 646 | } |
| 647 | |
| 648 | /* |
| 649 | * if the policy includes confidentiality, check that ciphertext is |
| 650 | * different than plaintext |
| 651 | * |
| 652 | * Note that this check will give false negatives, with some small |
| 653 | * probability, especially if the packets are short. For that |
| 654 | * reason, we skip this check if the plaintext is less than four |
| 655 | * octets long. |
| 656 | */ |
| 657 | if ((policy->rtp.sec_serv & sec_serv_conf) && (msg_len_octets >= 4)) { |
| 658 | printf("testing that ciphertext is distinct from plaintext..."); |
| 659 | status = err_status_algo_fail; |
| 660 | for (i=12; i < msg_len_octets+12; i++) |
| 661 | if (((uint8_t *)hdr)[i] != ((uint8_t *)hdr2)[i]) { |
| 662 | status = err_status_ok; |
| 663 | } |
| 664 | if (status) { |
| 665 | printf("failed\n"); |
| 666 | free(hdr); |
| 667 | free(hdr2); |
| 668 | return status; |
| 669 | } |
| 670 | printf("passed\n"); |
| 671 | } |
| 672 | |
| 673 | /* |
| 674 | * if the policy uses a 'wildcard' ssrc, then we need to make a copy |
| 675 | * of the policy that changes the direction to inbound |
| 676 | * |
| 677 | * we always copy the policy into the rcvr_policy, since otherwise |
| 678 | * the compiler would fret about the constness of the policy |
| 679 | */ |
| 680 | rcvr_policy = (srtp_policy_t*) malloc(sizeof(srtp_policy_t)); |
| 681 | if (rcvr_policy == NULL) |
| 682 | return err_status_alloc_fail; |
| 683 | memcpy(rcvr_policy, policy, sizeof(srtp_policy_t)); |
| 684 | if (policy->ssrc.type == ssrc_any_outbound) { |
| 685 | rcvr_policy->ssrc.type = ssrc_any_inbound; |
| 686 | } |
| 687 | |
| 688 | err_check(srtp_create(&srtp_rcvr, rcvr_policy)); |
| 689 | |
| 690 | err_check(srtp_unprotect(srtp_rcvr, hdr, &len)); |
| 691 | |
| 692 | debug_print(mod_driver, "after unprotection:\n%s", |
| 693 | srtp_packet_to_string(hdr, len)); |
| 694 | |
| 695 | /* verify that the unprotected packet matches the origial one */ |
| 696 | for (i=0; i < msg_len_octets; i++) |
| 697 | if (((uint8_t *)hdr)[i] != ((uint8_t *)hdr2)[i]) { |
| 698 | fprintf(stdout, "mismatch at octet %d\n", i); |
| 699 | status = err_status_algo_fail; |
| 700 | } |
| 701 | if (status) { |
| 702 | free(hdr); |
| 703 | free(hdr2); |
| 704 | return status; |
| 705 | } |
| 706 | |
| 707 | /* |
| 708 | * if the policy includes authentication, then test for false positives |
| 709 | */ |
| 710 | if (policy->rtp.sec_serv & sec_serv_auth) { |
| 711 | char *data = ((char *)hdr) + 12; |
| 712 | |
| 713 | printf("testing for false positives in replay check..."); |
| 714 | |
| 715 | /* set message length */ |
| 716 | len = msg_len_enc; |
| 717 | |
| 718 | /* unprotect a second time - should fail with a replay error */ |
| 719 | status = srtp_unprotect(srtp_rcvr, hdr_enc, &len); |
| 720 | if (status != err_status_replay_fail) { |
| 721 | printf("failed with error code %d\n", status); |
| 722 | free(hdr); |
| 723 | free(hdr2); |
| 724 | return status; |
| 725 | } else { |
| 726 | printf("passed\n"); |
| 727 | } |
| 728 | |
| 729 | printf("testing for false positives in auth check..."); |
| 730 | |
| 731 | /* increment sequence number in header */ |
| 732 | hdr->seq++; |
| 733 | |
| 734 | /* set message length */ |
| 735 | len = msg_len_octets; |
| 736 | |
| 737 | /* apply protection */ |
| 738 | err_check(srtp_protect(srtp_sender, hdr, &len)); |
| 739 | |
| 740 | /* flip bits in packet */ |
| 741 | data[0] ^= 0xff; |
| 742 | |
| 743 | /* unprotect, and check for authentication failure */ |
| 744 | status = srtp_unprotect(srtp_rcvr, hdr, &len); |
| 745 | if (status != err_status_auth_fail) { |
| 746 | printf("failed\n"); |
| 747 | free(hdr); |
| 748 | free(hdr2); |
| 749 | return status; |
| 750 | } else { |
| 751 | printf("passed\n"); |
| 752 | } |
| 753 | |
| 754 | } |
| 755 | |
| 756 | err_check(srtp_dealloc(srtp_sender)); |
| 757 | err_check(srtp_dealloc(srtp_rcvr)); |
| 758 | |
| 759 | free(hdr); |
| 760 | free(hdr2); |
| 761 | return err_status_ok; |
| 762 | } |
| 763 | |
| 764 | |
| 765 | err_status_t |
| 766 | srtcp_test(const srtp_policy_t *policy) { |
| 767 | int i; |
| 768 | srtp_t srtcp_sender; |
| 769 | srtp_t srtcp_rcvr; |
| 770 | err_status_t status = err_status_ok; |
| 771 | srtp_hdr_t *hdr, *hdr2; |
| 772 | uint8_t hdr_enc[64]; |
| 773 | uint8_t *pkt_end; |
| 774 | int msg_len_octets, msg_len_enc; |
| 775 | int len; |
| 776 | int tag_length = policy->rtp.auth_tag_len; |
| 777 | uint32_t ssrc; |
| 778 | srtp_policy_t *rcvr_policy; |
| 779 | |
| 780 | err_check(srtp_create(&srtcp_sender, policy)); |
| 781 | |
| 782 | /* print out policy */ |
| 783 | err_check(srtp_session_print_policy(srtcp_sender)); |
| 784 | |
| 785 | /* |
| 786 | * initialize data buffer, using the ssrc in the policy unless that |
| 787 | * value is a wildcard, in which case we'll just use an arbitrary |
| 788 | * one |
| 789 | */ |
| 790 | if (policy->ssrc.type != ssrc_specific) |
| 791 | ssrc = 0xdecafbad; |
| 792 | else |
| 793 | ssrc = policy->ssrc.value; |
| 794 | msg_len_octets = 28; |
| 795 | hdr = srtp_create_test_packet(msg_len_octets, ssrc); |
| 796 | |
| 797 | if (hdr == NULL) |
| 798 | return err_status_alloc_fail; |
| 799 | hdr2 = srtp_create_test_packet(msg_len_octets, ssrc); |
| 800 | if (hdr2 == NULL) { |
| 801 | free(hdr); |
| 802 | return err_status_alloc_fail; |
| 803 | } |
| 804 | |
| 805 | /* set message length */ |
| 806 | len = msg_len_octets; |
| 807 | |
| 808 | debug_print(mod_driver, "before protection:\n%s", |
| 809 | srtp_packet_to_string(hdr, len)); |
| 810 | |
| 811 | #if PRINT_REFERENCE_PACKET |
| 812 | debug_print(mod_driver, "reference packet before protection:\n%s", |
| 813 | octet_string_hex_string((uint8_t *)hdr, len)); |
| 814 | #endif |
| 815 | err_check(srtp_protect_rtcp(srtcp_sender, hdr, &len)); |
| 816 | |
| 817 | debug_print(mod_driver, "after protection:\n%s", |
| 818 | srtp_packet_to_string(hdr, len)); |
| 819 | #if PRINT_REFERENCE_PACKET |
| 820 | debug_print(mod_driver, "after protection:\n%s", |
| 821 | octet_string_hex_string((uint8_t *)hdr, len)); |
| 822 | #endif |
| 823 | |
| 824 | /* save protected message and length */ |
| 825 | memcpy(hdr_enc, hdr, len); |
| 826 | msg_len_enc = len; |
| 827 | |
| 828 | /* |
| 829 | * check for overrun of the srtp_protect() function |
| 830 | * |
| 831 | * The packet is followed by a value of 0xfffff; if the value of the |
| 832 | * data following the packet is different, then we know that the |
| 833 | * protect function is overwriting the end of the packet. |
| 834 | */ |
| 835 | pkt_end = (uint8_t *)hdr + sizeof(srtp_hdr_t) |
| 836 | + msg_len_octets + tag_length; |
| 837 | for (i = 0; i < 4; i++) |
| 838 | if (pkt_end[i] != 0xff) { |
| 839 | fprintf(stdout, "overwrite in srtp_protect_rtcp() function " |
| 840 | "(expected %x, found %x in trailing octet %d)\n", |
| 841 | 0xff, ((uint8_t *)hdr)[i], i); |
| 842 | free(hdr); |
| 843 | free(hdr2); |
| 844 | return err_status_algo_fail; |
| 845 | } |
| 846 | |
| 847 | /* |
| 848 | * if the policy includes confidentiality, check that ciphertext is |
| 849 | * different than plaintext |
| 850 | * |
| 851 | * Note that this check will give false negatives, with some small |
| 852 | * probability, especially if the packets are short. For that |
| 853 | * reason, we skip this check if the plaintext is less than four |
| 854 | * octets long. |
| 855 | */ |
| 856 | if ((policy->rtp.sec_serv & sec_serv_conf) && (msg_len_octets >= 4)) { |
| 857 | printf("testing that ciphertext is distinct from plaintext..."); |
| 858 | status = err_status_algo_fail; |
| 859 | for (i=12; i < msg_len_octets+12; i++) |
| 860 | if (((uint8_t *)hdr)[i] != ((uint8_t *)hdr2)[i]) { |
| 861 | status = err_status_ok; |
| 862 | } |
| 863 | if (status) { |
| 864 | printf("failed\n"); |
| 865 | free(hdr); |
| 866 | free(hdr2); |
| 867 | return status; |
| 868 | } |
| 869 | printf("passed\n"); |
| 870 | } |
| 871 | |
| 872 | /* |
| 873 | * if the policy uses a 'wildcard' ssrc, then we need to make a copy |
| 874 | * of the policy that changes the direction to inbound |
| 875 | * |
| 876 | * we always copy the policy into the rcvr_policy, since otherwise |
| 877 | * the compiler would fret about the constness of the policy |
| 878 | */ |
| 879 | rcvr_policy = (srtp_policy_t*) malloc(sizeof(srtp_policy_t)); |
| 880 | if (rcvr_policy == NULL) |
| 881 | return err_status_alloc_fail; |
| 882 | memcpy(rcvr_policy, policy, sizeof(srtp_policy_t)); |
| 883 | if (policy->ssrc.type == ssrc_any_outbound) { |
| 884 | rcvr_policy->ssrc.type = ssrc_any_inbound; |
| 885 | } |
| 886 | |
| 887 | err_check(srtp_create(&srtcp_rcvr, rcvr_policy)); |
| 888 | |
| 889 | err_check(srtp_unprotect_rtcp(srtcp_rcvr, hdr, &len)); |
| 890 | |
| 891 | debug_print(mod_driver, "after unprotection:\n%s", |
| 892 | srtp_packet_to_string(hdr, len)); |
| 893 | |
| 894 | /* verify that the unprotected packet matches the origial one */ |
| 895 | for (i=0; i < msg_len_octets; i++) |
| 896 | if (((uint8_t *)hdr)[i] != ((uint8_t *)hdr2)[i]) { |
| 897 | fprintf(stdout, "mismatch at octet %d\n", i); |
| 898 | status = err_status_algo_fail; |
| 899 | } |
| 900 | if (status) { |
| 901 | free(hdr); |
| 902 | free(hdr2); |
| 903 | return status; |
| 904 | } |
| 905 | |
| 906 | /* |
| 907 | * if the policy includes authentication, then test for false positives |
| 908 | */ |
| 909 | if (policy->rtp.sec_serv & sec_serv_auth) { |
| 910 | char *data = ((char *)hdr) + 12; |
| 911 | |
| 912 | printf("testing for false positives in replay check..."); |
| 913 | |
| 914 | /* set message length */ |
| 915 | len = msg_len_enc; |
| 916 | |
| 917 | /* unprotect a second time - should fail with a replay error */ |
| 918 | status = srtp_unprotect_rtcp(srtcp_rcvr, hdr_enc, &len); |
| 919 | if (status != err_status_replay_fail) { |
| 920 | printf("failed with error code %d\n", status); |
| 921 | free(hdr); |
| 922 | free(hdr2); |
| 923 | return status; |
| 924 | } else { |
| 925 | printf("passed\n"); |
| 926 | } |
| 927 | |
| 928 | printf("testing for false positives in auth check..."); |
| 929 | |
| 930 | /* increment sequence number in header */ |
| 931 | hdr->seq++; |
| 932 | |
| 933 | /* set message length */ |
| 934 | len = msg_len_octets; |
| 935 | |
| 936 | /* apply protection */ |
| 937 | err_check(srtp_protect_rtcp(srtcp_sender, hdr, &len)); |
| 938 | |
| 939 | /* flip bits in packet */ |
| 940 | data[0] ^= 0xff; |
| 941 | |
| 942 | /* unprotect, and check for authentication failure */ |
| 943 | status = srtp_unprotect_rtcp(srtcp_rcvr, hdr, &len); |
| 944 | if (status != err_status_auth_fail) { |
| 945 | printf("failed\n"); |
| 946 | free(hdr); |
| 947 | free(hdr2); |
| 948 | return status; |
| 949 | } else { |
| 950 | printf("passed\n"); |
| 951 | } |
| 952 | |
| 953 | } |
| 954 | |
| 955 | err_check(srtp_dealloc(srtcp_sender)); |
| 956 | err_check(srtp_dealloc(srtcp_rcvr)); |
| 957 | |
| 958 | free(hdr); |
| 959 | free(hdr2); |
| 960 | return err_status_ok; |
| 961 | } |
| 962 | |
| 963 | |
| 964 | err_status_t |
| 965 | srtp_session_print_policy(srtp_t srtp) { |
| 966 | char *serv_descr[4] = { |
| 967 | "none", |
| 968 | "confidentiality", |
| 969 | "authentication", |
| 970 | "confidentiality and authentication" |
| 971 | }; |
| 972 | char *direction[3] = { |
| 973 | "unknown", |
| 974 | "outbound", |
| 975 | "inbound" |
| 976 | }; |
| 977 | srtp_stream_t stream; |
| 978 | |
| 979 | /* sanity checking */ |
| 980 | if (srtp == NULL) |
| 981 | return err_status_fail; |
| 982 | |
| 983 | /* if there's a template stream, print it out */ |
| 984 | if (srtp->stream_template != NULL) { |
| 985 | stream = srtp->stream_template; |
| 986 | printf("# SSRC: any %s\r\n" |
| 987 | "# rtp cipher: %s\r\n" |
| 988 | "# rtp auth: %s\r\n" |
| 989 | "# rtp services: %s\r\n" |
| 990 | "# rtcp cipher: %s\r\n" |
| 991 | "# rtcp auth: %s\r\n" |
| 992 | "# rtcp services: %s\r\n", |
| 993 | direction[stream->direction], |
| 994 | stream->rtp_cipher->type->description, |
| 995 | stream->rtp_auth->type->description, |
| 996 | serv_descr[stream->rtp_services], |
| 997 | stream->rtcp_cipher->type->description, |
| 998 | stream->rtcp_auth->type->description, |
| 999 | serv_descr[stream->rtcp_services]); |
| 1000 | } |
| 1001 | |
| 1002 | /* loop over streams in session, printing the policy of each */ |
| 1003 | stream = srtp->stream_list; |
| 1004 | while (stream != NULL) { |
| 1005 | if (stream->rtp_services > sec_serv_conf_and_auth) |
| 1006 | return err_status_bad_param; |
| 1007 | |
| 1008 | printf("# SSRC: 0x%08x\r\n" |
| 1009 | "# rtp cipher: %s\r\n" |
| 1010 | "# rtp auth: %s\r\n" |
| 1011 | "# rtp services: %s\r\n" |
| 1012 | "# rtcp cipher: %s\r\n" |
| 1013 | "# rtcp auth: %s\r\n" |
| 1014 | "# rtcp services: %s\r\n", |
| 1015 | stream->ssrc, |
| 1016 | stream->rtp_cipher->type->description, |
| 1017 | stream->rtp_auth->type->description, |
| 1018 | serv_descr[stream->rtp_services], |
| 1019 | stream->rtcp_cipher->type->description, |
| 1020 | stream->rtcp_auth->type->description, |
| 1021 | serv_descr[stream->rtcp_services]); |
| 1022 | |
| 1023 | /* advance to next stream in the list */ |
| 1024 | stream = stream->next; |
| 1025 | } |
| 1026 | return err_status_ok; |
| 1027 | } |
| 1028 | |
| 1029 | err_status_t |
| 1030 | srtp_print_policy(const srtp_policy_t *policy) { |
| 1031 | err_status_t status; |
| 1032 | srtp_t session; |
| 1033 | |
| 1034 | status = srtp_create(&session, policy); |
| 1035 | if (status) |
| 1036 | return status; |
| 1037 | status = srtp_session_print_policy(session); |
| 1038 | if (status) |
| 1039 | return status; |
| 1040 | status = srtp_dealloc(session); |
| 1041 | if (status) |
| 1042 | return status; |
| 1043 | return err_status_ok; |
| 1044 | } |
| 1045 | |
| 1046 | /* |
| 1047 | * srtp_print_packet(...) is for debugging only |
| 1048 | * it prints an RTP packet to the stdout |
| 1049 | * |
| 1050 | * note that this function is *not* threadsafe |
| 1051 | */ |
| 1052 | |
| 1053 | #include <stdio.h> |
| 1054 | |
| 1055 | #define MTU 2048 |
| 1056 | |
| 1057 | char packet_string[MTU]; |
| 1058 | |
| 1059 | char * |
| 1060 | srtp_packet_to_string(srtp_hdr_t *hdr, int pkt_octet_len) { |
| 1061 | int octets_in_rtp_header = 12; |
| 1062 | uint8_t *data = ((uint8_t *)hdr)+octets_in_rtp_header; |
| 1063 | int hex_len = pkt_octet_len-octets_in_rtp_header; |
| 1064 | |
| 1065 | /* sanity checking */ |
| 1066 | if ((hdr == NULL) || (pkt_octet_len > MTU)) |
| 1067 | return NULL; |
| 1068 | |
| 1069 | /* write packet into string */ |
| 1070 | sprintf(packet_string, |
| 1071 | "(s)rtp packet: {\n" |
| 1072 | " version:\t%d\n" |
| 1073 | " p:\t\t%d\n" |
| 1074 | " x:\t\t%d\n" |
| 1075 | " cc:\t\t%d\n" |
| 1076 | " m:\t\t%d\n" |
| 1077 | " pt:\t\t%x\n" |
| 1078 | " seq:\t\t%x\n" |
| 1079 | " ts:\t\t%x\n" |
| 1080 | " ssrc:\t%x\n" |
| 1081 | " data:\t%s\n" |
| 1082 | "} (%d octets in total)\n", |
| 1083 | hdr->version, |
| 1084 | hdr->p, |
| 1085 | hdr->x, |
| 1086 | hdr->cc, |
| 1087 | hdr->m, |
| 1088 | hdr->pt, |
| 1089 | hdr->seq, |
| 1090 | hdr->ts, |
| 1091 | hdr->ssrc, |
| 1092 | octet_string_hex_string(data, hex_len), |
| 1093 | pkt_octet_len); |
| 1094 | |
| 1095 | return packet_string; |
| 1096 | } |
| 1097 | |
| 1098 | /* |
| 1099 | * mips_estimate() is a simple function to estimate the number of |
| 1100 | * instructions per second that the host can perform. note that this |
| 1101 | * function can be grossly wrong; you may want to have a manual sanity |
| 1102 | * check of its output! |
| 1103 | * |
| 1104 | * the 'ignore' pointer is there to convince the compiler to not just |
| 1105 | * optimize away the function |
| 1106 | */ |
| 1107 | |
| 1108 | double |
| 1109 | mips_estimate(int num_trials, int *ignore) { |
| 1110 | clock_t t; |
| 1111 | int i, sum; |
| 1112 | |
| 1113 | sum = 0; |
| 1114 | t = clock(); |
| 1115 | for (i=0; i<num_trials; i++) |
| 1116 | sum += i; |
| 1117 | t = clock() - t; |
| 1118 | |
| 1119 | /* printf("%d\n", sum); */ |
| 1120 | *ignore = sum; |
| 1121 | |
| 1122 | return (double) num_trials * CLOCKS_PER_SEC / t; |
| 1123 | } |
| 1124 | |
| 1125 | |
| 1126 | /* |
| 1127 | * srtp_validate() verifies the correctness of libsrtp by comparing |
| 1128 | * some computed packets against some pre-computed reference values. |
| 1129 | * These packets were made with the default SRTP policy. |
| 1130 | */ |
| 1131 | |
| 1132 | |
| 1133 | err_status_t |
| 1134 | srtp_validate() { |
| 1135 | unsigned char test_key[30] = { |
| 1136 | 0xe1, 0xf9, 0x7a, 0x0d, 0x3e, 0x01, 0x8b, 0xe0, |
| 1137 | 0xd6, 0x4f, 0xa3, 0x2c, 0x06, 0xde, 0x41, 0x39, |
| 1138 | 0x0e, 0xc6, 0x75, 0xad, 0x49, 0x8a, 0xfe, 0xeb, |
| 1139 | 0xb6, 0x96, 0x0b, 0x3a, 0xab, 0xe6 |
| 1140 | }; |
| 1141 | uint8_t srtp_plaintext_ref[28] = { |
| 1142 | 0x80, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, |
| 1143 | 0xca, 0xfe, 0xba, 0xbe, 0xab, 0xab, 0xab, 0xab, |
| 1144 | 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, |
| 1145 | 0xab, 0xab, 0xab, 0xab |
| 1146 | }; |
| 1147 | uint8_t srtp_plaintext[38] = { |
| 1148 | 0x80, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, |
| 1149 | 0xca, 0xfe, 0xba, 0xbe, 0xab, 0xab, 0xab, 0xab, |
| 1150 | 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, |
| 1151 | 0xab, 0xab, 0xab, 0xab, 0x00, 0x00, 0x00, 0x00, |
| 1152 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
| 1153 | }; |
| 1154 | uint8_t srtp_ciphertext[38] = { |
| 1155 | 0x80, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, |
| 1156 | 0xca, 0xfe, 0xba, 0xbe, 0x4e, 0x55, 0xdc, 0x4c, |
| 1157 | 0xe7, 0x99, 0x78, 0xd8, 0x8c, 0xa4, 0xd2, 0x15, |
| 1158 | 0x94, 0x9d, 0x24, 0x02, 0xb7, 0x8d, 0x6a, 0xcc, |
| 1159 | 0x99, 0xea, 0x17, 0x9b, 0x8d, 0xbb |
| 1160 | }; |
| 1161 | srtp_t srtp_snd, srtp_recv; |
| 1162 | err_status_t status; |
| 1163 | int len; |
| 1164 | srtp_policy_t policy; |
| 1165 | |
| 1166 | /* |
| 1167 | * create a session with a single stream using the default srtp |
| 1168 | * policy and with the SSRC value 0xcafebabe |
| 1169 | */ |
| 1170 | crypto_policy_set_rtp_default(&policy.rtp); |
| 1171 | crypto_policy_set_rtcp_default(&policy.rtcp); |
| 1172 | policy.ssrc.type = ssrc_specific; |
| 1173 | policy.ssrc.value = 0xcafebabe; |
| 1174 | policy.key = test_key; |
| 1175 | policy.next = NULL; |
| 1176 | |
| 1177 | status = srtp_create(&srtp_snd, &policy); |
| 1178 | if (status) |
| 1179 | return status; |
| 1180 | |
| 1181 | /* |
| 1182 | * protect plaintext, then compare with ciphertext |
| 1183 | */ |
| 1184 | len = 28; |
| 1185 | status = srtp_protect(srtp_snd, srtp_plaintext, &len); |
| 1186 | if (status || (len != 38)) |
| 1187 | return err_status_fail; |
| 1188 | |
| 1189 | debug_print(mod_driver, "ciphertext:\n %s", |
| 1190 | octet_string_hex_string(srtp_plaintext, len)); |
| 1191 | debug_print(mod_driver, "ciphertext reference:\n %s", |
| 1192 | octet_string_hex_string(srtp_ciphertext, len)); |
| 1193 | |
| 1194 | if (octet_string_is_eq(srtp_plaintext, srtp_ciphertext, len)) |
| 1195 | return err_status_fail; |
| 1196 | |
| 1197 | /* |
| 1198 | * create a receiver session context comparable to the one created |
| 1199 | * above - we need to do this so that the replay checking doesn't |
| 1200 | * complain |
| 1201 | */ |
| 1202 | status = srtp_create(&srtp_recv, &policy); |
| 1203 | if (status) |
| 1204 | return status; |
| 1205 | |
| 1206 | /* |
| 1207 | * unprotect ciphertext, then compare with plaintext |
| 1208 | */ |
| 1209 | status = srtp_unprotect(srtp_recv, srtp_ciphertext, &len); |
| 1210 | if (status || (len != 28)) |
| 1211 | return status; |
| 1212 | |
| 1213 | if (octet_string_is_eq(srtp_ciphertext, srtp_plaintext_ref, len)) |
| 1214 | return err_status_fail; |
| 1215 | |
| 1216 | return err_status_ok; |
| 1217 | } |
| 1218 | |
| 1219 | |
| 1220 | err_status_t |
| 1221 | srtp_create_big_policy(srtp_policy_t **list) { |
| 1222 | extern const srtp_policy_t *policy_array[]; |
| 1223 | srtp_policy_t *p, *tmp; |
| 1224 | int i = 0; |
| 1225 | uint32_t ssrc = 0; |
| 1226 | |
| 1227 | /* sanity checking */ |
| 1228 | if ((list == NULL) || (policy_array[0] == NULL)) |
| 1229 | return err_status_bad_param; |
| 1230 | |
| 1231 | /* |
| 1232 | * loop over policy list, mallocing a new list and copying values |
| 1233 | * into it (and incrementing the SSRC value as we go along) |
| 1234 | */ |
| 1235 | tmp = NULL; |
| 1236 | while (policy_array[i] != NULL) { |
| 1237 | p = (srtp_policy_t*) malloc(sizeof(srtp_policy_t)); |
| 1238 | if (p == NULL) |
| 1239 | return err_status_bad_param; |
| 1240 | memcpy(p, policy_array[i], sizeof(srtp_policy_t)); |
| 1241 | p->ssrc.type = ssrc_specific; |
| 1242 | p->ssrc.value = ssrc++; |
| 1243 | p->next = tmp; |
| 1244 | tmp = p; |
| 1245 | i++; |
| 1246 | } |
| 1247 | *list = p; |
| 1248 | |
| 1249 | return err_status_ok; |
| 1250 | } |
| 1251 | |
| 1252 | err_status_t |
| 1253 | srtp_test_remove_stream() { |
| 1254 | err_status_t status; |
| 1255 | srtp_policy_t *policy_list; |
| 1256 | srtp_t session; |
| 1257 | srtp_stream_t stream; |
| 1258 | /* |
| 1259 | * srtp_get_stream() is a libSRTP internal function that we declare |
| 1260 | * here so that we can use it to verify the correct operation of the |
| 1261 | * library |
| 1262 | */ |
| 1263 | extern srtp_stream_t srtp_get_stream(srtp_t srtp, uint32_t ssrc); |
| 1264 | |
| 1265 | |
| 1266 | status = srtp_create_big_policy(&policy_list); |
| 1267 | if (status) |
| 1268 | return status; |
| 1269 | |
| 1270 | status = srtp_create(&session, policy_list); |
| 1271 | if (status) |
| 1272 | return status; |
| 1273 | |
| 1274 | /* |
| 1275 | * check for false positives by trying to remove a stream that's not |
| 1276 | * in the session |
| 1277 | */ |
| 1278 | status = srtp_remove_stream(session, htonl(0xaaaaaaaa)); |
| 1279 | if (status != err_status_no_ctx) |
| 1280 | return err_status_fail; |
| 1281 | |
| 1282 | /* |
| 1283 | * check for false negatives by removing stream 0x1, then |
| 1284 | * searching for streams 0x0 and 0x2 |
| 1285 | */ |
| 1286 | status = srtp_remove_stream(session, htonl(0x1)); |
| 1287 | if (status != err_status_ok) |
| 1288 | return err_status_fail; |
| 1289 | stream = srtp_get_stream(session, htonl(0x0)); |
| 1290 | if (stream == NULL) |
| 1291 | return err_status_fail; |
| 1292 | stream = srtp_get_stream(session, htonl(0x2)); |
| 1293 | if (stream == NULL) |
| 1294 | return err_status_fail; |
| 1295 | |
| 1296 | return err_status_ok; |
| 1297 | } |
| 1298 | |
| 1299 | /* |
| 1300 | * srtp policy definitions - these definitions are used above |
| 1301 | */ |
| 1302 | |
| 1303 | unsigned char test_key[30] = { |
| 1304 | 0xe1, 0xf9, 0x7a, 0x0d, 0x3e, 0x01, 0x8b, 0xe0, |
| 1305 | 0xd6, 0x4f, 0xa3, 0x2c, 0x06, 0xde, 0x41, 0x39, |
| 1306 | 0x0e, 0xc6, 0x75, 0xad, 0x49, 0x8a, 0xfe, 0xeb, |
| 1307 | 0xb6, 0x96, 0x0b, 0x3a, 0xab, 0xe6 |
| 1308 | }; |
| 1309 | |
| 1310 | |
| 1311 | const srtp_policy_t default_policy = { |
| 1312 | { ssrc_any_outbound, 0 }, /* SSRC */ |
| 1313 | { /* SRTP policy */ |
| 1314 | AES_128_ICM, /* cipher type */ |
| 1315 | 30, /* cipher key length in octets */ |
| 1316 | HMAC_SHA1, /* authentication func type */ |
| 1317 | 16, /* auth key length in octets */ |
| 1318 | 10, /* auth tag length in octets */ |
| 1319 | sec_serv_conf_and_auth /* security services flag */ |
| 1320 | }, |
| 1321 | { /* SRTCP policy */ |
| 1322 | AES_128_ICM, /* cipher type */ |
| 1323 | 30, /* cipher key length in octets */ |
| 1324 | HMAC_SHA1, /* authentication func type */ |
| 1325 | 16, /* auth key length in octets */ |
| 1326 | 10, /* auth tag length in octets */ |
| 1327 | sec_serv_conf_and_auth /* security services flag */ |
| 1328 | }, |
| 1329 | test_key, |
| 1330 | NULL |
| 1331 | }; |
| 1332 | |
| 1333 | const srtp_policy_t aes_tmmh_policy = { |
| 1334 | { ssrc_any_outbound, 0 }, /* SSRC */ |
| 1335 | { |
| 1336 | AES_128_ICM, /* cipher type */ |
| 1337 | 30, /* cipher key length in octets */ |
| 1338 | UST_TMMHv2, /* authentication func type */ |
| 1339 | 94, /* auth key length in octets */ |
| 1340 | 4, /* auth tag length in octets */ |
| 1341 | sec_serv_conf_and_auth /* security services flag */ |
| 1342 | }, |
| 1343 | { |
| 1344 | AES_128_ICM, /* cipher type */ |
| 1345 | 30, /* cipher key length in octets */ |
| 1346 | UST_TMMHv2, /* authentication func type */ |
| 1347 | 94, /* auth key length in octets */ |
| 1348 | 4, /* auth tag length in octets */ |
| 1349 | sec_serv_conf_and_auth /* security services flag */ |
| 1350 | }, |
| 1351 | test_key, |
| 1352 | NULL |
| 1353 | }; |
| 1354 | |
| 1355 | const srtp_policy_t tmmh_only_policy = { |
| 1356 | { ssrc_any_outbound, 0 }, /* SSRC */ |
| 1357 | { |
| 1358 | AES_128_ICM, /* cipher type */ |
| 1359 | 30, /* cipher key length in octets */ |
| 1360 | UST_TMMHv2, /* authentication func type */ |
| 1361 | 94, /* auth key length in octets */ |
| 1362 | 4, /* auth tag length in octets */ |
| 1363 | sec_serv_auth /* security services flag */ |
| 1364 | }, |
| 1365 | { |
| 1366 | AES_128_ICM, /* cipher type */ |
| 1367 | 30, /* cipher key length in octets */ |
| 1368 | UST_TMMHv2, /* authentication func type */ |
| 1369 | 94, /* auth key length in octets */ |
| 1370 | 4, /* auth tag length in octets */ |
| 1371 | sec_serv_auth /* security services flag */ |
| 1372 | }, |
| 1373 | test_key, |
| 1374 | NULL |
| 1375 | }; |
| 1376 | |
| 1377 | const srtp_policy_t aes_only_policy = { |
| 1378 | { ssrc_any_outbound, 0 }, /* SSRC */ |
| 1379 | { |
| 1380 | AES_128_ICM, /* cipher type */ |
| 1381 | 30, /* cipher key length in octets */ |
| 1382 | NULL_AUTH, /* authentication func type */ |
| 1383 | 0, /* auth key length in octets */ |
| 1384 | 0, /* auth tag length in octets */ |
| 1385 | sec_serv_conf /* security services flag */ |
| 1386 | }, |
| 1387 | { |
| 1388 | AES_128_ICM, /* cipher type */ |
| 1389 | 30, /* cipher key length in octets */ |
| 1390 | NULL_AUTH, /* authentication func type */ |
| 1391 | 0, /* auth key length in octets */ |
| 1392 | 0, /* auth tag length in octets */ |
| 1393 | sec_serv_conf /* security services flag */ |
| 1394 | }, |
| 1395 | test_key, |
| 1396 | NULL |
| 1397 | }; |
| 1398 | |
| 1399 | const srtp_policy_t hmac_only_policy = { |
| 1400 | { ssrc_any_outbound, 0 }, /* SSRC */ |
| 1401 | { |
| 1402 | NULL_CIPHER, /* cipher type */ |
| 1403 | 0, /* cipher key length in octets */ |
| 1404 | HMAC_SHA1, /* authentication func type */ |
| 1405 | 20, /* auth key length in octets */ |
| 1406 | 4, /* auth tag length in octets */ |
| 1407 | sec_serv_auth /* security services flag */ |
| 1408 | }, |
| 1409 | { |
| 1410 | NULL_CIPHER, /* cipher type */ |
| 1411 | 0, /* cipher key length in octets */ |
| 1412 | HMAC_SHA1, /* authentication func type */ |
| 1413 | 20, /* auth key length in octets */ |
| 1414 | 4, /* auth tag length in octets */ |
| 1415 | sec_serv_auth /* security services flag */ |
| 1416 | }, |
| 1417 | test_key, |
| 1418 | NULL |
| 1419 | }; |
| 1420 | |
| 1421 | const srtp_policy_t null_policy = { |
| 1422 | { ssrc_any_outbound, 0 }, /* SSRC */ |
| 1423 | { |
| 1424 | NULL_CIPHER, /* cipher type */ |
| 1425 | 0, /* cipher key length in octets */ |
| 1426 | NULL_AUTH, /* authentication func type */ |
| 1427 | 0, /* auth key length in octets */ |
| 1428 | 0, /* auth tag length in octets */ |
| 1429 | sec_serv_none /* security services flag */ |
| 1430 | }, |
| 1431 | { |
| 1432 | NULL_CIPHER, /* cipher type */ |
| 1433 | 0, /* cipher key length in octets */ |
| 1434 | NULL_AUTH, /* authentication func type */ |
| 1435 | 0, /* auth key length in octets */ |
| 1436 | 0, /* auth tag length in octets */ |
| 1437 | sec_serv_none /* security services flag */ |
| 1438 | }, |
| 1439 | test_key, |
| 1440 | NULL |
| 1441 | }; |
| 1442 | |
| 1443 | |
| 1444 | /* |
| 1445 | * an array of pointers to the policies listed above |
| 1446 | * |
| 1447 | * This array is used to test various aspects of libSRTP for |
| 1448 | * different cryptographic policies. The order of the elements |
| 1449 | * matters - the timing test generates output that can be used |
| 1450 | * in a plot (see the gnuplot script file 'timing'). If you |
| 1451 | * add to this list, you should do it at the end. |
| 1452 | */ |
| 1453 | |
| 1454 | #define USE_TMMH 0 |
| 1455 | |
| 1456 | const srtp_policy_t * |
| 1457 | policy_array[] = { |
| 1458 | &hmac_only_policy, |
| 1459 | #if USE_TMMH |
| 1460 | &tmmh_only_policy, |
| 1461 | #endif |
| 1462 | &aes_only_policy, |
| 1463 | #if USE_TMMH |
| 1464 | &aes_tmmh_policy, |
| 1465 | #endif |
| 1466 | &default_policy, |
| 1467 | &null_policy, |
| 1468 | NULL |
| 1469 | }; |
| 1470 | |
| 1471 | const srtp_policy_t wildcard_policy = { |
| 1472 | { ssrc_any_outbound, 0 }, /* SSRC */ |
| 1473 | { /* SRTP policy */ |
| 1474 | AES_128_ICM, /* cipher type */ |
| 1475 | 30, /* cipher key length in octets */ |
| 1476 | HMAC_SHA1, /* authentication func type */ |
| 1477 | 16, /* auth key length in octets */ |
| 1478 | 10, /* auth tag length in octets */ |
| 1479 | sec_serv_conf_and_auth /* security services flag */ |
| 1480 | }, |
| 1481 | { /* SRTCP policy */ |
| 1482 | AES_128_ICM, /* cipher type */ |
| 1483 | 30, /* cipher key length in octets */ |
| 1484 | HMAC_SHA1, /* authentication func type */ |
| 1485 | 16, /* auth key length in octets */ |
| 1486 | 10, /* auth tag length in octets */ |
| 1487 | sec_serv_conf_and_auth /* security services flag */ |
| 1488 | }, |
| 1489 | test_key, |
| 1490 | NULL |
| 1491 | }; |