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 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 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 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
