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115 lines
3.7 KiB
115 lines
3.7 KiB
/* |
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* A 32-bit implementation of the TEA algorithm |
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* Copyright (c) 2015 Vesselin Bontchev |
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* |
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* Loosely based on the implementation of David Wheeler and Roger Needham, |
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* https://en.wikipedia.org/wiki/Tiny_Encryption_Algorithm#Reference_code |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <stdio.h> |
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#include "libavutil/common.h" |
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#include "libavutil/tea.h" |
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#define TEA_NUM_TESTS 4 |
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// https://github.com/logandrews/TeaCrypt/blob/master/tea/tea_test.go |
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static const uint8_t tea_test_key[TEA_NUM_TESTS][16] = { |
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{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
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}, |
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{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
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}, |
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{ 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, |
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0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF |
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}, |
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{ 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, |
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0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF |
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} |
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}; |
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static const uint8_t tea_test_pt[TEA_NUM_TESTS][8] = { |
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{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, |
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{ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 }, |
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{ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 }, |
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{ 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF } |
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}; |
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static const uint8_t tea_test_ct[TEA_NUM_TESTS][8] = { |
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{ 0x41, 0xEA, 0x3A, 0x0A, 0x94, 0xBA, 0xA9, 0x40 }, |
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{ 0x6A, 0x2F, 0x9C, 0xF3, 0xFC, 0xCF, 0x3C, 0x55 }, |
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{ 0xDE, 0xB1, 0xC0, 0xA2, 0x7E, 0x74, 0x5D, 0xB3 }, |
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{ 0x12, 0x6C, 0x6B, 0x92, 0xC0, 0x65, 0x3A, 0x3E } |
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}; |
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static void test_tea(struct AVTEA *ctx, uint8_t *dst, const uint8_t *src, |
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const uint8_t *ref, int len, uint8_t *iv, int dir, |
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const char *test) |
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{ |
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av_tea_crypt(ctx, dst, src, len, iv, dir); |
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if (memcmp(dst, ref, 8*len)) { |
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int i; |
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printf("%s failed\ngot ", test); |
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for (i = 0; i < 8*len; i++) |
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printf("%02x ", dst[i]); |
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printf("\nexpected "); |
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for (i = 0; i < 8*len; i++) |
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printf("%02x ", ref[i]); |
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printf("\n"); |
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exit(1); |
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} |
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} |
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int main(void) |
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{ |
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struct AVTEA *ctx; |
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uint8_t buf[8], iv[8]; |
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int i; |
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static const uint8_t src[32] = "HelloWorldHelloWorldHelloWorld"; |
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uint8_t ct[32]; |
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uint8_t pl[32]; |
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ctx = av_tea_alloc(); |
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if (!ctx) |
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return 1; |
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for (i = 0; i < TEA_NUM_TESTS; i++) { |
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av_tea_init(ctx, tea_test_key[i], 64); |
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test_tea(ctx, buf, tea_test_pt[i], tea_test_ct[i], 1, NULL, 0, "encryption"); |
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test_tea(ctx, buf, tea_test_ct[i], tea_test_pt[i], 1, NULL, 1, "decryption"); |
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/* encrypt */ |
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memcpy(iv, "HALLO123", 8); |
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av_tea_crypt(ctx, ct, src, 4, iv, 0); |
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/* decrypt into pl */ |
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memcpy(iv, "HALLO123", 8); |
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test_tea(ctx, pl, ct, src, 4, iv, 1, "CBC decryption"); |
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memcpy(iv, "HALLO123", 8); |
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test_tea(ctx, ct, ct, src, 4, iv, 1, "CBC inplace decryption"); |
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} |
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printf("Test encryption/decryption success.\n"); |
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av_free(ctx); |
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return 0; |
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}
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