| /* |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include "libavformat/rtpdec.h" |
| #include "libavformat/srtp.h" |
| |
| static const char *aes128_80_key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmn"; |
| |
| static const uint8_t rtp_aes128_80[] = { |
| // RTP header |
| 0x80, 0xe0, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x56, 0x78, |
| // encrypted payload |
| 0x62, 0x69, 0x76, 0xca, 0xc5, |
| // HMAC |
| 0xa1, 0xac, 0x1b, 0xb4, 0xa0, 0x1c, 0xd5, 0x49, 0x28, 0x99, |
| }; |
| |
| static const uint8_t rtcp_aes128_80[] = { |
| // RTCP header |
| 0x81, 0xc9, 0x00, 0x07, 0x12, 0x34, 0x56, 0x78, |
| // encrypted payload |
| 0x8a, 0xac, 0xdc, 0xa5, 0x4c, 0xf6, 0x78, 0xa6, 0x62, 0x8f, 0x24, 0xda, |
| 0x6c, 0x09, 0x3f, 0xa9, 0x28, 0x7a, 0xb5, 0x7f, 0x1f, 0x0f, 0xc9, 0x35, |
| // RTCP index |
| 0x80, 0x00, 0x00, 0x03, |
| // HMAC |
| 0xe9, 0x3b, 0xc0, 0x5c, 0x0c, 0x06, 0x9f, 0xab, 0xc0, 0xde, |
| }; |
| |
| static const char *aes128_32_key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmn"; |
| |
| static const uint8_t rtp_aes128_32[] = { |
| // RTP header |
| 0x80, 0xe0, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x56, 0x78, |
| // encrypted payload |
| 0x62, 0x69, 0x76, 0xca, 0xc5, |
| // HMAC |
| 0xa1, 0xac, 0x1b, 0xb4, |
| }; |
| |
| static const uint8_t rtcp_aes128_32[] = { |
| // RTCP header |
| 0x81, 0xc9, 0x00, 0x07, 0x12, 0x34, 0x56, 0x78, |
| // encrypted payload |
| 0x35, 0xe9, 0xb5, 0xff, 0x0d, 0xd1, 0xde, 0x70, 0x74, 0x10, 0xaa, 0x1b, |
| 0xb2, 0x8d, 0xf0, 0x20, 0x02, 0x99, 0x6b, 0x1b, 0x0b, 0xd0, 0x47, 0x34, |
| // RTCP index |
| 0x80, 0x00, 0x00, 0x04, |
| // HMAC |
| 0x5b, 0xd2, 0xa9, 0x9d, |
| }; |
| |
| static const char *aes128_80_32_key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmn"; |
| |
| static const uint8_t rtp_aes128_80_32[] = { |
| // RTP header |
| 0x80, 0xe0, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x56, 0x78, |
| // encrypted payload |
| 0x62, 0x69, 0x76, 0xca, 0xc5, |
| // HMAC |
| 0xa1, 0xac, 0x1b, 0xb4, |
| }; |
| |
| static const uint8_t rtcp_aes128_80_32[] = { |
| // RTCP header |
| 0x81, 0xc9, 0x00, 0x07, 0x12, 0x34, 0x56, 0x78, |
| // encrypted payload |
| 0xd6, 0xae, 0xc1, 0x58, 0x63, 0x70, 0xc9, 0x88, 0x66, 0x26, 0x1c, 0x53, |
| 0xff, 0x5d, 0x5d, 0x2b, 0x0f, 0x8c, 0x72, 0x3e, 0xc9, 0x1d, 0x43, 0xf9, |
| // RTCP index |
| 0x80, 0x00, 0x00, 0x05, |
| // HMAC |
| 0x09, 0x16, 0xb4, 0x27, 0x9a, 0xe9, 0x92, 0x26, 0x4e, 0x10, |
| }; |
| |
| static void print_data(const uint8_t *buf, int len) |
| { |
| int i; |
| for (i = 0; i < len; i++) |
| printf("%02x", buf[i]); |
| printf("\n"); |
| } |
| |
| static int test_decrypt(struct SRTPContext *srtp, const uint8_t *in, int len, |
| uint8_t *out) |
| { |
| memcpy(out, in, len); |
| if (!ff_srtp_decrypt(srtp, out, &len)) { |
| print_data(out, len); |
| return len; |
| } else |
| return -1; |
| } |
| |
| static void test_encrypt(const uint8_t *data, int in_len, const char *suite, |
| const char *key) |
| { |
| struct SRTPContext enc = { 0 }, dec = { 0 }; |
| int len; |
| char buf[RTP_MAX_PACKET_LENGTH]; |
| ff_srtp_set_crypto(&enc, suite, key); |
| ff_srtp_set_crypto(&dec, suite, key); |
| len = ff_srtp_encrypt(&enc, data, in_len, buf, sizeof(buf)); |
| if (!ff_srtp_decrypt(&dec, buf, &len)) { |
| if (len == in_len && !memcmp(buf, data, len)) |
| printf("Decrypted content matches input\n"); |
| else |
| printf("Decrypted content doesn't match input\n"); |
| } else { |
| printf("Decryption failed\n"); |
| } |
| ff_srtp_free(&enc); |
| ff_srtp_free(&dec); |
| } |
| |
| int main(void) |
| { |
| static const char *aes128_80_suite = "AES_CM_128_HMAC_SHA1_80"; |
| static const char *aes128_32_suite = "AES_CM_128_HMAC_SHA1_32"; |
| static const char *aes128_80_32_suite = "SRTP_AES128_CM_HMAC_SHA1_32"; |
| static const char *test_key = "abcdefghijklmnopqrstuvwxyz1234567890ABCD"; |
| uint8_t buf[RTP_MAX_PACKET_LENGTH]; |
| struct SRTPContext srtp = { 0 }; |
| int len; |
| ff_srtp_set_crypto(&srtp, aes128_80_suite, aes128_80_key); |
| len = test_decrypt(&srtp, rtp_aes128_80, sizeof(rtp_aes128_80), buf); |
| test_encrypt(buf, len, aes128_80_suite, test_key); |
| test_encrypt(buf, len, aes128_32_suite, test_key); |
| test_encrypt(buf, len, aes128_80_32_suite, test_key); |
| test_decrypt(&srtp, rtcp_aes128_80, sizeof(rtcp_aes128_80), buf); |
| test_encrypt(buf, len, aes128_80_suite, test_key); |
| test_encrypt(buf, len, aes128_32_suite, test_key); |
| test_encrypt(buf, len, aes128_80_32_suite, test_key); |
| ff_srtp_free(&srtp); |
| |
| memset(&srtp, 0, sizeof(srtp)); // Clear the context |
| ff_srtp_set_crypto(&srtp, aes128_32_suite, aes128_32_key); |
| test_decrypt(&srtp, rtp_aes128_32, sizeof(rtp_aes128_32), buf); |
| test_decrypt(&srtp, rtcp_aes128_32, sizeof(rtcp_aes128_32), buf); |
| ff_srtp_free(&srtp); |
| |
| memset(&srtp, 0, sizeof(srtp)); // Clear the context |
| ff_srtp_set_crypto(&srtp, aes128_80_32_suite, aes128_80_32_key); |
| test_decrypt(&srtp, rtp_aes128_80_32, sizeof(rtp_aes128_80_32), buf); |
| test_decrypt(&srtp, rtcp_aes128_80_32, sizeof(rtcp_aes128_80_32), buf); |
| ff_srtp_free(&srtp); |
| return 0; |
| } |