LCOV - code coverage report
Current view: top level - src/libavutil/tests - tea.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 20 29 69.0 %
Date: 2017-01-22 02:20:28 Functions: 2 2 100.0 %

          Line data    Source code
       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/tea.h"
      29             : 
      30             : #define TEA_NUM_TESTS 4
      31             : 
      32             : // https://github.com/logandrews/TeaCrypt/blob/master/tea/tea_test.go
      33             : static const uint8_t tea_test_key[TEA_NUM_TESTS][16] = {
      34             :     { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      35             :       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
      36             :     },
      37             :     { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      38             :       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
      39             :     },
      40             :     { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
      41             :       0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF
      42             :     },
      43             :     { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
      44             :       0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF
      45             :     }
      46             : };
      47             : 
      48             : static const uint8_t tea_test_pt[TEA_NUM_TESTS][8] = {
      49             :     { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
      50             :     { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 },
      51             :     { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 },
      52             :     { 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF }
      53             : };
      54             : 
      55             : static const uint8_t tea_test_ct[TEA_NUM_TESTS][8] = {
      56             :     { 0x41, 0xEA, 0x3A, 0x0A, 0x94, 0xBA, 0xA9, 0x40 },
      57             :     { 0x6A, 0x2F, 0x9C, 0xF3, 0xFC, 0xCF, 0x3C, 0x55 },
      58             :     { 0xDE, 0xB1, 0xC0, 0xA2, 0x7E, 0x74, 0x5D, 0xB3 },
      59             :     { 0x12, 0x6C, 0x6B, 0x92, 0xC0, 0x65, 0x3A, 0x3E }
      60             : };
      61             : 
      62          16 : static void test_tea(struct AVTEA *ctx, uint8_t *dst, const uint8_t *src,
      63             :                      const uint8_t *ref, int len, uint8_t *iv, int dir,
      64             :                      const char *test)
      65             : {
      66          16 :     av_tea_crypt(ctx, dst, src, len, iv, dir);
      67          16 :     if (memcmp(dst, ref, 8*len)) {
      68             :         int i;
      69           0 :         printf("%s failed\ngot      ", test);
      70           0 :         for (i = 0; i < 8*len; i++)
      71           0 :             printf("%02x ", dst[i]);
      72           0 :         printf("\nexpected ");
      73           0 :         for (i = 0; i < 8*len; i++)
      74           0 :             printf("%02x ", ref[i]);
      75           0 :         printf("\n");
      76           0 :         exit(1);
      77             :     }
      78          16 : }
      79             : 
      80           1 : int main(void)
      81             : {
      82             :     struct AVTEA *ctx;
      83             :     uint8_t buf[8], iv[8];
      84             :     int i;
      85             :     static const uint8_t src[32] = "HelloWorldHelloWorldHelloWorld";
      86             :     uint8_t ct[32];
      87             :     uint8_t pl[32];
      88             : 
      89           1 :     ctx = av_tea_alloc();
      90           1 :     if (!ctx)
      91           0 :         return 1;
      92             : 
      93           5 :     for (i = 0; i < TEA_NUM_TESTS; i++) {
      94           4 :         av_tea_init(ctx, tea_test_key[i], 64);
      95             : 
      96           4 :         test_tea(ctx, buf, tea_test_pt[i], tea_test_ct[i], 1, NULL, 0, "encryption");
      97           4 :         test_tea(ctx, buf, tea_test_ct[i], tea_test_pt[i], 1, NULL, 1, "decryption");
      98             : 
      99             :         /* encrypt */
     100           4 :         memcpy(iv, "HALLO123", 8);
     101           4 :         av_tea_crypt(ctx, ct, src, 4, iv, 0);
     102             : 
     103             :         /* decrypt into pl */
     104           4 :         memcpy(iv, "HALLO123", 8);
     105           4 :         test_tea(ctx, pl, ct, src, 4, iv, 1, "CBC decryption");
     106             : 
     107           4 :         memcpy(iv, "HALLO123", 8);
     108           4 :         test_tea(ctx, ct, ct, src, 4, iv, 1, "CBC inplace decryption");
     109             :     }
     110             : 
     111           1 :     printf("Test encryption/decryption success.\n");
     112           1 :     av_free(ctx);
     113             : 
     114           1 :     return 0;
     115             : }

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