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Diffstat (limited to 'test/dtls_srtp_driver.c')
| -rw-r--r-- | test/dtls_srtp_driver.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/test/dtls_srtp_driver.c b/test/dtls_srtp_driver.c new file mode 100644 index 0000000..87058d2 --- /dev/null +++ b/test/dtls_srtp_driver.c @@ -0,0 +1,248 @@ +/* + * dtls_srtp_driver.c + * + * test driver for DTLS-SRTP functions + * + * David McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2001-2006 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include <stdio.h> /* for printf() */ +#include "getopt_s.h" /* for local getopt() */ +#include "srtp_priv.h" + +err_status_t +test_dtls_srtp(); + +srtp_hdr_t * +srtp_create_test_packet(int pkt_octet_len, uint32_t ssrc); + +void +usage(char *prog_name) { + printf("usage: %s [ -t ][ -c ][ -v ][-d <debug_module> ]* [ -l ]\n" + " -d <mod> turn on debugging module <mod>\n" + " -l list debugging modules\n", prog_name); + exit(1); +} + +int +main(int argc, char *argv[]) { + unsigned do_list_mods = 0; + char q; + err_status_t err; + + printf("dtls_srtp_driver\n"); + + /* initialize srtp library */ + err = srtp_init(); + if (err) { + printf("error: srtp init failed with error code %d\n", err); + exit(1); + } + + /* process input arguments */ + while (1) { + q = getopt_s(argc, argv, "ld:"); + if (q == -1) + break; + switch (q) { + case 'l': + do_list_mods = 1; + break; + case 'd': + err = crypto_kernel_set_debug_module(optarg_s, 1); + if (err) { + printf("error: set debug module (%s) failed\n", optarg_s); + exit(1); + } + break; + default: + usage(argv[0]); + } + } + + if (do_list_mods) { + err = crypto_kernel_list_debug_modules(); + if (err) { + printf("error: list of debug modules failed\n"); + exit(1); + } + } + + printf("testing dtls_srtp..."); + err = test_dtls_srtp(); + if (err) { + printf("\nerror (code %d)\n", err); + exit(1); + } + printf("passed\n"); + + return 0; +} + + +err_status_t +test_dtls_srtp() { + srtp_hdr_t *test_packet; + int test_packet_len = 80; + srtp_t s; + srtp_policy_t policy; + uint8_t key[SRTP_MAX_KEY_LEN]; + uint8_t salt[SRTP_MAX_KEY_LEN]; + unsigned int key_len, salt_len; + srtp_profile_t profile; + err_status_t err; + + /* create a 'null' SRTP session */ + err = srtp_create(&s, NULL); + if (err) + return err; + + /* + * verify that packet-processing functions behave properly - we + * expect that these functions will return err_status_no_ctx + */ + test_packet = srtp_create_test_packet(80, 0xa5a5a5a5); + if (test_packet == NULL) + return err_status_alloc_fail; + err = srtp_protect(s, test_packet, &test_packet_len); + if (err != err_status_no_ctx) { + printf("wrong return value from srtp_protect() (got code %d)\n", + err); + return err_status_fail; + } + err = srtp_unprotect(s, test_packet, &test_packet_len); + if (err != err_status_no_ctx) { + printf("wrong return value from srtp_unprotect() (got code %d)\n", + err); + return err_status_fail; + } + err = srtp_protect_rtcp(s, test_packet, &test_packet_len); + if (err != err_status_no_ctx) { + printf("wrong return value from srtp_protect_rtcp() (got code %d)\n", + err); + return err_status_fail; + } + err = srtp_unprotect_rtcp(s, test_packet, &test_packet_len); + if (err != err_status_no_ctx) { + printf("wrong return value from srtp_unprotect_rtcp() (got code %d)\n", + err); + return err_status_fail; + } + + + /* + * set keys to known values for testing + */ + profile = srtp_profile_aes128_cm_sha1_80; + key_len = srtp_profile_get_master_key_length(profile); + salt_len = srtp_profile_get_master_salt_length(profile); + memset(key, 0xff, key_len); + memset(salt, 0xee, salt_len); + append_salt_to_key(key, key_len, salt, salt_len); + policy.key = key; + + /* initialize SRTP policy from profile */ + err = crypto_policy_set_from_profile_for_rtp(&policy.rtp, profile); + if (err) return err; + err = crypto_policy_set_from_profile_for_rtcp(&policy.rtcp, profile); + if (err) return err; + policy.ssrc.type = ssrc_any_inbound; + policy.ekt = NULL; + policy.window_size = 128; + policy.allow_repeat_tx = 0; + policy.next = NULL; + + err = srtp_add_stream(s, &policy); + if (err) + return err; + + return err_status_ok; +} + + + +/* + * srtp_create_test_packet(len, ssrc) returns a pointer to a + * (malloced) example RTP packet whose data field has the length given + * by pkt_octet_len and the SSRC value ssrc. The total length of the + * packet is twelve octets longer, since the header is at the + * beginning. There is room at the end of the packet for a trailer, + * and the four octets following the packet are filled with 0xff + * values to enable testing for overwrites. + * + * note that the location of the test packet can (and should) be + * deallocated with the free() call once it is no longer needed. + */ + +srtp_hdr_t * +srtp_create_test_packet(int pkt_octet_len, uint32_t ssrc) { + int i; + uint8_t *buffer; + srtp_hdr_t *hdr; + int bytes_in_hdr = 12; + + /* allocate memory for test packet */ + hdr = malloc(pkt_octet_len + bytes_in_hdr + + SRTP_MAX_TRAILER_LEN + 4); + if (!hdr) + return NULL; + + hdr->version = 2; /* RTP version two */ + hdr->p = 0; /* no padding needed */ + hdr->x = 0; /* no header extension */ + hdr->cc = 0; /* no CSRCs */ + hdr->m = 0; /* marker bit */ + hdr->pt = 0xf; /* payload type */ + hdr->seq = htons(0x1234); /* sequence number */ + hdr->ts = htonl(0xdecafbad); /* timestamp */ + hdr->ssrc = htonl(ssrc); /* synch. source */ + + buffer = (uint8_t *)hdr; + buffer += bytes_in_hdr; + + /* set RTP data to 0xab */ + for (i=0; i < pkt_octet_len; i++) + *buffer++ = 0xab; + + /* set post-data value to 0xffff to enable overrun checking */ + for (i=0; i < SRTP_MAX_TRAILER_LEN+4; i++) + *buffer++ = 0xff; + + return hdr; +} |