| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * A 32-bit implementation of the TEA algorithm | ||
| 3 | * Copyright (c) 2015 Vesselin Bontchev | ||
| 4 | * | ||
| 5 | * Loosely based on the implementation of David Wheeler and Roger Needham, | ||
| 6 | * https://en.wikipedia.org/wiki/Tiny_Encryption_Algorithm#Reference_code | ||
| 7 | * | ||
| 8 | * This file is part of FFmpeg. | ||
| 9 | * | ||
| 10 | * FFmpeg is free software; you can redistribute it and/or | ||
| 11 | * modify it under the terms of the GNU Lesser General Public | ||
| 12 | * License as published by the Free Software Foundation; either | ||
| 13 | * version 2.1 of the License, or (at your option) any later version. | ||
| 14 | * | ||
| 15 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 18 | * Lesser General Public License for more details. | ||
| 19 | * | ||
| 20 | * You should have received a copy of the GNU Lesser General Public | ||
| 21 | * License along with FFmpeg; if not, write to the Free Software | ||
| 22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 23 | */ | ||
| 24 | |||
| 25 | #include <stdio.h> | ||
| 26 | |||
| 27 | #include "libavutil/common.h" | ||
| 28 | #include "libavutil/mem.h" | ||
| 29 | #include "libavutil/tea.h" | ||
| 30 | |||
| 31 | #define TEA_NUM_TESTS 4 | ||
| 32 | |||
| 33 | // https://github.com/logandrews/TeaCrypt/blob/master/tea/tea_test.go | ||
| 34 | static const uint8_t tea_test_key[TEA_NUM_TESTS][16] = { | ||
| 35 | { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | ||
| 36 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 | ||
| 37 | }, | ||
| 38 | { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | ||
| 39 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 | ||
| 40 | }, | ||
| 41 | { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, | ||
| 42 | 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF | ||
| 43 | }, | ||
| 44 | { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, | ||
| 45 | 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF | ||
| 46 | } | ||
| 47 | }; | ||
| 48 | |||
| 49 | static const uint8_t tea_test_pt[TEA_NUM_TESTS][8] = { | ||
| 50 | { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, | ||
| 51 | { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 }, | ||
| 52 | { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 }, | ||
| 53 | { 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF } | ||
| 54 | }; | ||
| 55 | |||
| 56 | static const uint8_t tea_test_ct[TEA_NUM_TESTS][8] = { | ||
| 57 | { 0x41, 0xEA, 0x3A, 0x0A, 0x94, 0xBA, 0xA9, 0x40 }, | ||
| 58 | { 0x6A, 0x2F, 0x9C, 0xF3, 0xFC, 0xCF, 0x3C, 0x55 }, | ||
| 59 | { 0xDE, 0xB1, 0xC0, 0xA2, 0x7E, 0x74, 0x5D, 0xB3 }, | ||
| 60 | { 0x12, 0x6C, 0x6B, 0x92, 0xC0, 0x65, 0x3A, 0x3E } | ||
| 61 | }; | ||
| 62 | |||
| 63 | 16 | static void test_tea(struct AVTEA *ctx, uint8_t *dst, const uint8_t *src, | |
| 64 | const uint8_t *ref, int len, uint8_t *iv, int dir, | ||
| 65 | const char *test) | ||
| 66 | { | ||
| 67 | 16 | av_tea_crypt(ctx, dst, src, len, iv, dir); | |
| 68 |
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16 | if (memcmp(dst, ref, 8*len)) { |
| 69 | int i; | ||
| 70 | ✗ | printf("%s failed\ngot ", test); | |
| 71 | ✗ | for (i = 0; i < 8*len; i++) | |
| 72 | ✗ | printf("%02x ", dst[i]); | |
| 73 | ✗ | printf("\nexpected "); | |
| 74 | ✗ | for (i = 0; i < 8*len; i++) | |
| 75 | ✗ | printf("%02x ", ref[i]); | |
| 76 | ✗ | printf("\n"); | |
| 77 | ✗ | exit(1); | |
| 78 | } | ||
| 79 | 16 | } | |
| 80 | |||
| 81 | 1 | int main(void) | |
| 82 | { | ||
| 83 | struct AVTEA *ctx; | ||
| 84 | uint8_t buf[8], iv[8]; | ||
| 85 | int i; | ||
| 86 | static const uint8_t src[32] = "HelloWorldHelloWorldHelloWorld"; | ||
| 87 | uint8_t ct[32]; | ||
| 88 | uint8_t pl[32]; | ||
| 89 | |||
| 90 | 1 | ctx = av_tea_alloc(); | |
| 91 |
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1 | if (!ctx) |
| 92 | ✗ | return 1; | |
| 93 | |||
| 94 |
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5 | for (i = 0; i < TEA_NUM_TESTS; i++) { |
| 95 | 4 | av_tea_init(ctx, tea_test_key[i], 64); | |
| 96 | |||
| 97 | 4 | test_tea(ctx, buf, tea_test_pt[i], tea_test_ct[i], 1, NULL, 0, "encryption"); | |
| 98 | 4 | test_tea(ctx, buf, tea_test_ct[i], tea_test_pt[i], 1, NULL, 1, "decryption"); | |
| 99 | |||
| 100 | /* encrypt */ | ||
| 101 | 4 | memcpy(iv, "HALLO123", 8); | |
| 102 | 4 | av_tea_crypt(ctx, ct, src, 4, iv, 0); | |
| 103 | |||
| 104 | /* decrypt into pl */ | ||
| 105 | 4 | memcpy(iv, "HALLO123", 8); | |
| 106 | 4 | test_tea(ctx, pl, ct, src, 4, iv, 1, "CBC decryption"); | |
| 107 | |||
| 108 | 4 | memcpy(iv, "HALLO123", 8); | |
| 109 | 4 | test_tea(ctx, ct, ct, src, 4, iv, 1, "CBC inplace decryption"); | |
| 110 | } | ||
| 111 | |||
| 112 | 1 | printf("Test encryption/decryption success.\n"); | |
| 113 | 1 | av_free(ctx); | |
| 114 | |||
| 115 | 1 | return 0; | |
| 116 | } | ||
| 117 |