1 /*
2 * Copyright (c) 2013 The WebM project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include <cstdio>
12 #include <cstdlib>
13 #include <string>
14 #include <vector>
15 #include "third_party/googletest/src/include/gtest/gtest.h"
16 #include "test/codec_factory.h"
17 #include "test/ivf_video_source.h"
18
19 namespace {
20 // In a real use the 'decrypt_state' parameter will be a pointer to a struct
21 // with whatever internal state the decryptor uses. For testing we'll just
22 // xor with a constant key, and decrypt_state will point to the start of
23 // the original buffer.
24 const uint8_t test_key[16] = { 0x01, 0x12, 0x23, 0x34, 0x45, 0x56, 0x67, 0x78,
25 0x89, 0x9a, 0xab, 0xbc, 0xcd, 0xde, 0xef, 0xf0 };
26
encrypt_buffer(const uint8_t * src,uint8_t * dst,size_t size,ptrdiff_t offset)27 void encrypt_buffer(const uint8_t *src, uint8_t *dst, size_t size,
28 ptrdiff_t offset) {
29 for (size_t i = 0; i < size; ++i) {
30 dst[i] = src[i] ^ test_key[(offset + i) & 15];
31 }
32 }
33
test_decrypt_cb(void * decrypt_state,const uint8_t * input,uint8_t * output,int count)34 void test_decrypt_cb(void *decrypt_state, const uint8_t *input, uint8_t *output,
35 int count) {
36 encrypt_buffer(input, output, count,
37 input - reinterpret_cast<uint8_t *>(decrypt_state));
38 }
39
40 } // namespace
41
42 namespace libvpx_test {
43
TEST(TestDecrypt,DecryptWorksVp9)44 TEST(TestDecrypt, DecryptWorksVp9) {
45 libvpx_test::IVFVideoSource video("vp90-2-05-resize.ivf");
46 video.Init();
47
48 vpx_codec_dec_cfg_t dec_cfg = vpx_codec_dec_cfg_t();
49 VP9Decoder decoder(dec_cfg, 0);
50
51 video.Begin();
52
53 // no decryption
54 vpx_codec_err_t res = decoder.DecodeFrame(video.cxdata(), video.frame_size());
55 ASSERT_EQ(VPX_CODEC_OK, res) << decoder.DecodeError();
56
57 // decrypt frame
58 video.Next();
59
60 std::vector<uint8_t> encrypted(video.frame_size());
61 encrypt_buffer(video.cxdata(), &encrypted[0], video.frame_size(), 0);
62 vpx_decrypt_init di = { test_decrypt_cb, &encrypted[0] };
63 decoder.Control(VPXD_SET_DECRYPTOR, &di);
64
65 res = decoder.DecodeFrame(&encrypted[0], encrypted.size());
66 ASSERT_EQ(VPX_CODEC_OK, res) << decoder.DecodeError();
67 }
68
69 } // namespace libvpx_test
70