2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "libavformat/rtpdec.h"
24 #include "libavformat/srtp.h"
26 static const char *aes128_80_key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmn";
28 static const uint8_t rtp_aes128_80[] = {
30 0x80, 0xe0, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x56, 0x78,
32 0x62, 0x69, 0x76, 0xca, 0xc5,
34 0xa1, 0xac, 0x1b, 0xb4, 0xa0, 0x1c, 0xd5, 0x49, 0x28, 0x99,
37 static const uint8_t rtcp_aes128_80[] = {
39 0x81, 0xc9, 0x00, 0x07, 0x12, 0x34, 0x56, 0x78,
41 0x8a, 0xac, 0xdc, 0xa5, 0x4c, 0xf6, 0x78, 0xa6, 0x62, 0x8f, 0x24, 0xda,
42 0x6c, 0x09, 0x3f, 0xa9, 0x28, 0x7a, 0xb5, 0x7f, 0x1f, 0x0f, 0xc9, 0x35,
44 0x80, 0x00, 0x00, 0x03,
46 0xe9, 0x3b, 0xc0, 0x5c, 0x0c, 0x06, 0x9f, 0xab, 0xc0, 0xde,
49 static const char *aes128_32_key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmn";
51 static const uint8_t rtp_aes128_32[] = {
53 0x80, 0xe0, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x56, 0x78,
55 0x62, 0x69, 0x76, 0xca, 0xc5,
57 0xa1, 0xac, 0x1b, 0xb4,
60 static const uint8_t rtcp_aes128_32[] = {
62 0x81, 0xc9, 0x00, 0x07, 0x12, 0x34, 0x56, 0x78,
64 0x35, 0xe9, 0xb5, 0xff, 0x0d, 0xd1, 0xde, 0x70, 0x74, 0x10, 0xaa, 0x1b,
65 0xb2, 0x8d, 0xf0, 0x20, 0x02, 0x99, 0x6b, 0x1b, 0x0b, 0xd0, 0x47, 0x34,
67 0x80, 0x00, 0x00, 0x04,
69 0x5b, 0xd2, 0xa9, 0x9d,
72 static const char *aes128_80_32_key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmn";
74 static const uint8_t rtp_aes128_80_32[] = {
76 0x80, 0xe0, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x56, 0x78,
78 0x62, 0x69, 0x76, 0xca, 0xc5,
80 0xa1, 0xac, 0x1b, 0xb4,
83 static const uint8_t rtcp_aes128_80_32[] = {
85 0x81, 0xc9, 0x00, 0x07, 0x12, 0x34, 0x56, 0x78,
87 0xd6, 0xae, 0xc1, 0x58, 0x63, 0x70, 0xc9, 0x88, 0x66, 0x26, 0x1c, 0x53,
88 0xff, 0x5d, 0x5d, 0x2b, 0x0f, 0x8c, 0x72, 0x3e, 0xc9, 0x1d, 0x43, 0xf9,
90 0x80, 0x00, 0x00, 0x05,
92 0x09, 0x16, 0xb4, 0x27, 0x9a, 0xe9, 0x92, 0x26, 0x4e, 0x10,
95 static void print_data(const uint8_t *buf, int len)
98 for (i = 0; i < len; i++)
99 printf("%02x", buf[i]);
103 static int test_decrypt(struct SRTPContext *srtp, const uint8_t *in, int len,
106 memcpy(out, in, len);
107 if (!ff_srtp_decrypt(srtp, out, &len)) {
108 print_data(out, len);
114 static void test_encrypt(const uint8_t *data, int in_len, const char *suite,
117 struct SRTPContext enc = { 0 }, dec = { 0 };
119 char buf[RTP_MAX_PACKET_LENGTH];
120 ff_srtp_set_crypto(&enc, suite, key);
121 ff_srtp_set_crypto(&dec, suite, key);
122 len = ff_srtp_encrypt(&enc, data, in_len, buf, sizeof(buf));
123 if (!ff_srtp_decrypt(&dec, buf, &len)) {
124 if (len == in_len && !memcmp(buf, data, len))
125 printf("Decrypted content matches input\n");
127 printf("Decrypted content doesn't match input\n");
129 printf("Decryption failed\n");
137 static const char *aes128_80_suite = "AES_CM_128_HMAC_SHA1_80";
138 static const char *aes128_32_suite = "AES_CM_128_HMAC_SHA1_32";
139 static const char *aes128_80_32_suite = "SRTP_AES128_CM_HMAC_SHA1_32";
140 static const char *test_key = "abcdefghijklmnopqrstuvwxyz1234567890ABCD";
141 uint8_t buf[RTP_MAX_PACKET_LENGTH];
142 struct SRTPContext srtp = { 0 };
144 ff_srtp_set_crypto(&srtp, aes128_80_suite, aes128_80_key);
145 len = test_decrypt(&srtp, rtp_aes128_80, sizeof(rtp_aes128_80), buf);
146 test_encrypt(buf, len, aes128_80_suite, test_key);
147 test_encrypt(buf, len, aes128_32_suite, test_key);
148 test_encrypt(buf, len, aes128_80_32_suite, test_key);
149 test_decrypt(&srtp, rtcp_aes128_80, sizeof(rtcp_aes128_80), buf);
150 test_encrypt(buf, len, aes128_80_suite, test_key);
151 test_encrypt(buf, len, aes128_32_suite, test_key);
152 test_encrypt(buf, len, aes128_80_32_suite, test_key);
155 memset(&srtp, 0, sizeof(srtp)); // Clear the context
156 ff_srtp_set_crypto(&srtp, aes128_32_suite, aes128_32_key);
157 test_decrypt(&srtp, rtp_aes128_32, sizeof(rtp_aes128_32), buf);
158 test_decrypt(&srtp, rtcp_aes128_32, sizeof(rtcp_aes128_32), buf);
161 memset(&srtp, 0, sizeof(srtp)); // Clear the context
162 ff_srtp_set_crypto(&srtp, aes128_80_32_suite, aes128_80_32_key);
163 test_decrypt(&srtp, rtp_aes128_80_32, sizeof(rtp_aes128_80_32), buf);
164 test_decrypt(&srtp, rtcp_aes128_80_32, sizeof(rtcp_aes128_80_32), buf);