libavutil/tests/encryption_info.c

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #include "libavutil/encryption_info.h"
  20
  21 #include <stdio.h>
  22 #include <string.h>
  23
  24 #include "libavutil/avassert.h"
  25 #include "libavutil/mem.h"
  26
  27 static const AVSubsampleEncryptionInfo test_subsamples[] = {{1, 2}, {3, 4}, {5, 6}, {7, 8}};
  28 static const size_t test_subsample_count = sizeof(test_subsamples) / sizeof(test_subsamples[0]);
  29 static const uint8_t test_iv[] = {0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18};
  30 static const uint8_t test_key_id[] = {0x21, 0x22, 0x23, 0x24};
  31 static const uint8_t test_key_id_2[] = {0x31, 0x32, 0x33, 0x34};
  32 static const uint8_t test_system_id[] = {0x41, 0x42, 0x43};
  33 static const uint8_t test_data[] = {0x51, 0x52};
  34
  35 static int compare_encryption_info(const AVEncryptionInfo *a, const AVEncryptionInfo *b) {
  36     if (!a || !b || a->scheme != b->scheme || a->crypt_byte_block != b->crypt_byte_block ||
  37         a->skip_byte_block != b->skip_byte_block || a->key_id_size != b->key_id_size ||
  38         a->iv_size != b->iv_size || a->subsample_count != b->subsample_count)
  39         return 1;
  40
  41     if (memcmp(a->key_id, b->key_id, a->key_id_size) != 0 ||
  42         memcmp(a->iv, b->iv, a->iv_size) != 0 ||
  43         memcmp(a->subsamples, b->subsamples, a->subsample_count * sizeof(a->subsamples[0])))
  44         return 1;
  45
  46     return 0;
  47 }
  48
  49 static int compare_encryption_init_info(const AVEncryptionInitInfo *a, const AVEncryptionInitInfo *b) {
  50     if (!a || !b || a->system_id_size != b->system_id_size ||
  51         a->num_key_ids != b->num_key_ids || a->key_id_size != b->key_id_size ||
  52         a->data_size != b->data_size)
  53         return 1;
  54
  55     if (memcmp(a->system_id, b->system_id, a->system_id_size) != 0 ||
  56         memcmp(a->data, b->data, a->data_size) != 0)
  57         return 1;
  58
  59     for (uint32_t i = 0; i < a->num_key_ids; i++) {
  60         if (memcmp(a->key_ids[i], b->key_ids[i], a->key_id_size) != 0)
  61             return 1;
  62     }
  63
  64     if (a->next || b->next) {
  65         if (!a->next || !b->next)
  66             return 1;
  67         if (compare_encryption_init_info(a->next, b->next) != 0)
  68             return 1;
  69     }
  70
  71     return 0;
  72 }
  73
  74 static void run_encryption_info_test(void)
  75 {
  76     AVEncryptionInfo *info, *copy;
  77     uint8_t *side_data;
  78     size_t side_data_size;
  79
  80     info = av_encryption_info_alloc(test_subsample_count, sizeof(test_key_id), sizeof(test_iv));
  81     av_assert0(info);
  82     av_assert0(info->key_id);
  83     av_assert0(info->key_id_size == sizeof(test_key_id));
  84     av_assert0(info->iv);
  85     av_assert0(info->iv_size == sizeof(test_iv));
  86     av_assert0(info->subsamples);
  87     av_assert0(info->subsample_count == test_subsample_count);
  88
  89     info->scheme = 1234;
  90     info->crypt_byte_block = 333;
  91     info->skip_byte_block = 444;
  92     memcpy(info->key_id, test_key_id, sizeof(test_key_id));
  93     memcpy(info->iv, test_iv, sizeof(test_iv));
  94     memcpy(info->subsamples, test_subsamples, sizeof(test_subsamples));
  95
  96     copy = av_encryption_info_clone(info);
  97     av_assert0(copy);
  98     av_assert0(copy != info);
  99     av_assert0(compare_encryption_info(info, copy) == 0);
 100     av_encryption_info_free(copy);
 101
 102     side_data = av_encryption_info_add_side_data(info, &side_data_size);
 103     av_assert0(side_data);
 104     av_assert0(side_data_size > 0);
 105
 106     copy = av_encryption_info_get_side_data(side_data, side_data_size);
 107     av_assert0(copy);
 108     av_assert0(copy != info);
 109     av_assert0(compare_encryption_info(info, copy) == 0);
 110     av_encryption_info_free(copy);
 111     av_free(side_data);
 112
 113     av_encryption_info_free(info);
 114 }
 115
 116 static AVEncryptionInitInfo *create_init_info(void)
 117 {
 118     AVEncryptionInitInfo *info;
 119
 120     info = av_encryption_init_info_alloc(sizeof(test_system_id), 2, sizeof(test_key_id), sizeof(test_data));
 121     av_assert0(info);
 122     av_assert0(info->system_id);
 123     av_assert0(info->system_id_size == sizeof(test_system_id));
 124     av_assert0(info->key_ids);
 125     av_assert0(info->num_key_ids == 2);
 126     av_assert0(info->key_id_size == sizeof(test_key_id));
 127     av_assert0(info->key_ids[0]);
 128     av_assert0(info->key_ids[1]);
 129     av_assert0(info->data);
 130     av_assert0(info->data_size == sizeof(test_data));
 131     av_assert0(!info->next);
 132
 133     memcpy(info->system_id, test_system_id, sizeof(test_system_id));
 134     memcpy(info->key_ids[0], test_key_id, sizeof(test_key_id));
 135     memcpy(info->key_ids[1], test_key_id_2, sizeof(test_key_id_2));
 136     memcpy(info->data, test_data, sizeof(test_data));
 137
 138     return info;
 139 }
 140
 141 static void run_encryption_init_info_test(void)
 142 {
 143     AVEncryptionInitInfo *info, *copy;
 144     uint8_t *side_data;
 145     size_t side_data_size;
 146
 147     info = create_init_info();
 148
 149     side_data = av_encryption_init_info_add_side_data(info, &side_data_size);
 150     av_assert0(side_data);
 151     av_assert0(side_data_size > 0);
 152     copy = av_encryption_init_info_get_side_data(side_data, side_data_size);
 153     av_assert0(copy);
 154     av_assert0(compare_encryption_init_info(info, copy) == 0);
 155     av_encryption_init_info_free(copy);
 156     av_free(side_data);
 157
 158     // Make the first init info different from the second to test the correct order.
 159     memset(info->system_id, 0, info->system_id_size);
 160     info->next = create_init_info();
 161     side_data = av_encryption_init_info_add_side_data(info, &side_data_size);
 162     av_assert0(side_data);
 163     copy = av_encryption_init_info_get_side_data(side_data, side_data_size);
 164     av_assert0(copy);
 165     av_assert0(compare_encryption_init_info(info, copy) == 0);
 166     av_encryption_init_info_free(copy);
 167     av_free(side_data);
 168
 169     av_encryption_init_info_free(info);
 170 }
 171
 172 int main(int argc, char **argv)
 173 {
 174     run_encryption_info_test();
 175     run_encryption_init_info_test();
 176     return 0;
 177 }