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790f793844
There are lots of files that don't need it: The number of object files that actually need it went down from 2011 to 884 here. Keep it for external users in order to not cause breakages. Also improve the other headers a bit while just at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
117 lines
3.7 KiB
C
117 lines
3.7 KiB
C
/*
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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/mem.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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