/* * A 32-bit implementation of the TEA algorithm * Copyright (c) 2015 Vesselin Bontchev * * Loosely based on the implementation of David Wheeler and Roger Needham, * https://en.wikipedia.org/wiki/Tiny_Encryption_Algorithm#Reference_code * * 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 <stdio.h> #include "libavutil/common.h" #include "libavutil/tea.h" #define TEA_NUM_TESTS 4 // https://github.com/logandrews/TeaCrypt/blob/master/tea/tea_test.go static const uint8_t tea_test_key[TEA_NUM_TESTS][16] = { { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF }, { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF } }; static const uint8_t tea_test_pt[TEA_NUM_TESTS][8] = { { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 }, { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 }, { 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF } }; static const uint8_t tea_test_ct[TEA_NUM_TESTS][8] = { { 0x41, 0xEA, 0x3A, 0x0A, 0x94, 0xBA, 0xA9, 0x40 }, { 0x6A, 0x2F, 0x9C, 0xF3, 0xFC, 0xCF, 0x3C, 0x55 }, { 0xDE, 0xB1, 0xC0, 0xA2, 0x7E, 0x74, 0x5D, 0xB3 }, { 0x12, 0x6C, 0x6B, 0x92, 0xC0, 0x65, 0x3A, 0x3E } }; static void test_tea(struct AVTEA *ctx, uint8_t *dst, const uint8_t *src, const uint8_t *ref, int len, uint8_t *iv, int dir, const char *test) { av_tea_crypt(ctx, dst, src, len, iv, dir); if (memcmp(dst, ref, 8*len)) { int i; printf("%s failed\ngot ", test); for (i = 0; i < 8*len; i++) printf("%02x ", dst[i]); printf("\nexpected "); for (i = 0; i < 8*len; i++) printf("%02x ", ref[i]); printf("\n"); exit(1); } } int main(void) { struct AVTEA *ctx; uint8_t buf[8], iv[8]; int i; static const uint8_t src[32] = "HelloWorldHelloWorldHelloWorld"; uint8_t ct[32]; uint8_t pl[32]; ctx = av_tea_alloc(); if (!ctx) return 1; for (i = 0; i < TEA_NUM_TESTS; i++) { av_tea_init(ctx, tea_test_key[i], 64); test_tea(ctx, buf, tea_test_pt[i], tea_test_ct[i], 1, NULL, 0, "encryption"); test_tea(ctx, buf, tea_test_ct[i], tea_test_pt[i], 1, NULL, 1, "decryption"); /* encrypt */ memcpy(iv, "HALLO123", 8); av_tea_crypt(ctx, ct, src, 4, iv, 0); /* decrypt into pl */ memcpy(iv, "HALLO123", 8); test_tea(ctx, pl, ct, src, 4, iv, 1, "CBC decryption"); memcpy(iv, "HALLO123", 8); test_tea(ctx, ct, ct, src, 4, iv, 1, "CBC inplace decryption"); } printf("Test encryption/decryption success.\n"); av_free(ctx); return 0; }