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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.
*/
#ifndef API_TEST_FAKE_FRAME_DECRYPTOR_H_
#define API_TEST_FAKE_FRAME_DECRYPTOR_H_
#include <stddef.h>
#include <stdint.h>
#include <vector>
#include "api/array_view.h"
#include "api/crypto/frame_decryptor_interface.h"
#include "api/media_types.h"
namespace webrtc {
// The FakeFrameDecryptor is a TEST ONLY fake implementation of the
// FrameDecryptorInterface. It is constructed with a simple single digit key and
// a fixed postfix byte. This is just to validate that the core code works
// as expected.
class FakeFrameDecryptor : public FrameDecryptorInterface {
public:
// Provide a key (0,255) and some postfix byte (0,255) this should match the
// byte you expect from the FakeFrameEncryptor.
explicit FakeFrameDecryptor(uint8_t fake_key = 0xAA,
uint8_t expected_postfix_byte = 255);
// Fake decryption that just xors the payload with the 1 byte key and checks
// the postfix byte. This will always fail if fail_decryption_ is set to true.
Result 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) override;
// Always returns 1 less than the size of the encrypted frame.
size_t GetMaxPlaintextByteSize(cricket::MediaType media_type,
size_t encrypted_frame_size) override;
// Sets the fake key to use for encryption.
void SetFakeKey(uint8_t fake_key);
// Returns the fake key used for encryption.
uint8_t GetFakeKey() const;
// Set the Postfix byte that is expected in the encrypted payload.
void SetExpectedPostfixByte(uint8_t expected_postfix_byte);
// Returns the postfix byte that will be checked for in the encrypted payload.
uint8_t GetExpectedPostfixByte() const;
// If set to true will force all encryption to fail.
void SetFailDecryption(bool fail_decryption);
// Simple error codes for tests to validate against.
enum class FakeDecryptStatus : int {
OK = 0,
FORCED_FAILURE = 1,
INVALID_POSTFIX = 2
};
private:
uint8_t fake_key_ = 0;
uint8_t expected_postfix_byte_ = 0;
bool fail_decryption_ = false;
};
} // namespace webrtc
#endif // API_TEST_FAKE_FRAME_DECRYPTOR_H_
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