FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/tests/srtp.c
Date: 2024-04-26 14:42:52
Exec Total Coverage
Lines: 44 47 93.6%
Functions: 4 4 100.0%
Branches: 6 10 60.0%
Line Branch Exec Source
1 /*
2 * This file is part of FFmpeg.
3 *
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.
8 *
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.
13 *
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
17 */
18
19 #include <stdint.h>
20 #include <stdio.h>
21 #include <string.h>
22
23 #include "libavformat/rtpdec.h"
24 #include "libavformat/srtp.h"
25
26 static const char *aes128_80_key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmn";
27
28 static const uint8_t rtp_aes128_80[] = {
29 // RTP header
30 0x80, 0xe0, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x56, 0x78,
31 // encrypted payload
32 0x62, 0x69, 0x76, 0xca, 0xc5,
33 // HMAC
34 0xa1, 0xac, 0x1b, 0xb4, 0xa0, 0x1c, 0xd5, 0x49, 0x28, 0x99,
35 };
36
37 static const uint8_t rtcp_aes128_80[] = {
38 // RTCP header
39 0x81, 0xc9, 0x00, 0x07, 0x12, 0x34, 0x56, 0x78,
40 // encrypted payload
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,
43 // RTCP index
44 0x80, 0x00, 0x00, 0x03,
45 // HMAC
46 0xe9, 0x3b, 0xc0, 0x5c, 0x0c, 0x06, 0x9f, 0xab, 0xc0, 0xde,
47 };
48
49 static const char *aes128_32_key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmn";
50
51 static const uint8_t rtp_aes128_32[] = {
52 // RTP header
53 0x80, 0xe0, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x56, 0x78,
54 // encrypted payload
55 0x62, 0x69, 0x76, 0xca, 0xc5,
56 // HMAC
57 0xa1, 0xac, 0x1b, 0xb4,
58 };
59
60 static const uint8_t rtcp_aes128_32[] = {
61 // RTCP header
62 0x81, 0xc9, 0x00, 0x07, 0x12, 0x34, 0x56, 0x78,
63 // encrypted payload
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,
66 // RTCP index
67 0x80, 0x00, 0x00, 0x04,
68 // HMAC
69 0x5b, 0xd2, 0xa9, 0x9d,
70 };
71
72 static const char *aes128_80_32_key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmn";
73
74 static const uint8_t rtp_aes128_80_32[] = {
75 // RTP header
76 0x80, 0xe0, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x56, 0x78,
77 // encrypted payload
78 0x62, 0x69, 0x76, 0xca, 0xc5,
79 // HMAC
80 0xa1, 0xac, 0x1b, 0xb4,
81 };
82
83 static const uint8_t rtcp_aes128_80_32[] = {
84 // RTCP header
85 0x81, 0xc9, 0x00, 0x07, 0x12, 0x34, 0x56, 0x78,
86 // encrypted payload
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,
89 // RTCP index
90 0x80, 0x00, 0x00, 0x05,
91 // HMAC
92 0x09, 0x16, 0xb4, 0x27, 0x9a, 0xe9, 0x92, 0x26, 0x4e, 0x10,
93 };
94
95 6 static void print_data(const uint8_t *buf, int len)
96 {
97 int i;
98
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 153 for (i = 0; i < len; i++)
99 147 printf("%02x", buf[i]);
100 6 printf("\n");
101 6 }
102
103 6 static int test_decrypt(struct SRTPContext *srtp, const uint8_t *in, int len,
104 uint8_t *out)
105 {
106 6 memcpy(out, in, len);
107
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 6 if (!ff_srtp_decrypt(srtp, out, &len)) {
108 6 print_data(out, len);
109 6 return len;
110 } else
111 ✗ return -1;
112 }
113
114 6 static void test_encrypt(const uint8_t *data, int in_len, const char *suite,
115 const char *key)
116 {
117 6 struct SRTPContext enc = { 0 }, dec = { 0 };
118 int len;
119 char buf[RTP_MAX_PACKET_LENGTH];
120 6 ff_srtp_set_crypto(&enc, suite, key);
121 6 ff_srtp_set_crypto(&dec, suite, key);
122 6 len = ff_srtp_encrypt(&enc, data, in_len, buf, sizeof(buf));
123
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 6 if (!ff_srtp_decrypt(&dec, buf, &len)) {
124
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 6 if (len == in_len && !memcmp(buf, data, len))
125 6 printf("Decrypted content matches input\n");
126 else
127 ✗ printf("Decrypted content doesn't match input\n");
128 } else {
129 ✗ printf("Decryption failed\n");
130 }
131 6 ff_srtp_free(&enc);
132 6 ff_srtp_free(&dec);
133 6 }
134
135 1 int main(void)
136 {
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 1 struct SRTPContext srtp = { 0 };
143 int len;
144 1 ff_srtp_set_crypto(&srtp, aes128_80_suite, aes128_80_key);
145 1 len = test_decrypt(&srtp, rtp_aes128_80, sizeof(rtp_aes128_80), buf);
146 1 test_encrypt(buf, len, aes128_80_suite, test_key);
147 1 test_encrypt(buf, len, aes128_32_suite, test_key);
148 1 test_encrypt(buf, len, aes128_80_32_suite, test_key);
149 1 test_decrypt(&srtp, rtcp_aes128_80, sizeof(rtcp_aes128_80), buf);
150 1 test_encrypt(buf, len, aes128_80_suite, test_key);
151 1 test_encrypt(buf, len, aes128_32_suite, test_key);
152 1 test_encrypt(buf, len, aes128_80_32_suite, test_key);
153 1 ff_srtp_free(&srtp);
154
155 1 memset(&srtp, 0, sizeof(srtp)); // Clear the context
156 1 ff_srtp_set_crypto(&srtp, aes128_32_suite, aes128_32_key);
157 1 test_decrypt(&srtp, rtp_aes128_32, sizeof(rtp_aes128_32), buf);
158 1 test_decrypt(&srtp, rtcp_aes128_32, sizeof(rtcp_aes128_32), buf);
159 1 ff_srtp_free(&srtp);
160
161 1 memset(&srtp, 0, sizeof(srtp)); // Clear the context
162 1 ff_srtp_set_crypto(&srtp, aes128_80_32_suite, aes128_80_32_key);
163 1 test_decrypt(&srtp, rtp_aes128_80_32, sizeof(rtp_aes128_80_32), buf);
164 1 test_decrypt(&srtp, rtcp_aes128_80_32, sizeof(rtcp_aes128_80_32), buf);
165 1 ff_srtp_free(&srtp);
166 1 return 0;
167 }
168