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/*
* Copyright 2018 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "api/test/fake_frame_decryptor.h"
#include <vector>
#include "rtc_base/checks.h"
namespace webrtc {
FakeFrameDecryptor::FakeFrameDecryptor(uint8_t fake_key,
uint8_t expected_postfix_byte)
: fake_key_(fake_key), expected_postfix_byte_(expected_postfix_byte) {}
FakeFrameDecryptor::Result FakeFrameDecryptor::Decrypt(
cricket::MediaType media_type,
const std::vector<uint32_t>& csrcs,
rtc::ArrayView<const uint8_t> additional_data,
rtc::ArrayView<const uint8_t> encrypted_frame,
rtc::ArrayView<uint8_t> frame) {
if (fail_decryption_) {
return Result(Status::kFailedToDecrypt, 0);
}
RTC_CHECK_EQ(frame.size() + 1, encrypted_frame.size());
for (size_t i = 0; i < frame.size(); i++) {
frame[i] = encrypted_frame[i] ^ fake_key_;
}
if (encrypted_frame[frame.size()] != expected_postfix_byte_) {
return Result(Status::kFailedToDecrypt, 0);
}
return Result(Status::kOk, frame.size());
}
size_t FakeFrameDecryptor::GetMaxPlaintextByteSize(
cricket::MediaType media_type,
size_t encrypted_frame_size) {
return encrypted_frame_size - 1;
}
void FakeFrameDecryptor::SetFakeKey(uint8_t fake_key) {
fake_key_ = fake_key;
}
uint8_t FakeFrameDecryptor::GetFakeKey() const {
return fake_key_;
}
void FakeFrameDecryptor::SetExpectedPostfixByte(uint8_t expected_postfix_byte) {
expected_postfix_byte_ = expected_postfix_byte;
}
uint8_t FakeFrameDecryptor::GetExpectedPostfixByte() const {
return expected_postfix_byte_;
}
void FakeFrameDecryptor::SetFailDecryption(bool fail_decryption) {
fail_decryption_ = fail_decryption;
}
} // namespace webrtc
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