Add current version of libSRTP from CVS.

libsrtp/test/dtls_srtp_driver.c

+/*
+ * 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(void);
+
+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;
+  int 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");
+  
+  /* shut down srtp library */
+  err = srtp_shutdown();
+  if (err) {
+    printf("error: srtp shutdown failed with error code %d\n", err);
+    exit(1);
+  }
+
+  return 0;
+}
+
+
+err_status_t
+test_dtls_srtp(void) {
+  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;
+  
+  err = srtp_dealloc(s);
+  if (err)
+    return err;
+
+  free(test_packet);
+
+  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;
+}