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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_ENCRYPTOR_H_
#define API_TEST_FAKE_FRAME_ENCRYPTOR_H_
#include <stddef.h>
#include <stdint.h>
#include "api/array_view.h"
#include "api/crypto/frame_encryptor_interface.h"
#include "api/media_types.h"
#include "rtc_base/ref_counted_object.h"
namespace webrtc {
// The FakeFrameEncryptor is a TEST ONLY fake implementation of the
// FrameEncryptorInterface. 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 FakeFrameEncryptor
: public rtc::RefCountedObject<FrameEncryptorInterface> {
public:
// Provide a key (0,255) and some postfix byte (0,255).
explicit FakeFrameEncryptor(uint8_t fake_key = 0xAA,
uint8_t postfix_byte = 255);
// Simply xors each payload with the provided fake key and adds the postfix
// bit to the end. This will always fail if fail_encryption_ is set to true.
int Encrypt(cricket::MediaType media_type,
uint32_t ssrc,
rtc::ArrayView<const uint8_t> additional_data,
rtc::ArrayView<const uint8_t> frame,
rtc::ArrayView<uint8_t> encrypted_frame,
size_t* bytes_written) override;
// Always returns 1 more than the size of the frame.
size_t GetMaxCiphertextByteSize(cricket::MediaType media_type,
size_t frame_size) override;
// Sets the fake key to use during encryption.
void SetFakeKey(uint8_t fake_key);
// Returns the fake key used during encryption.
uint8_t GetFakeKey() const;
// Set the postfix byte to use.
void SetPostfixByte(uint8_t expected_postfix_byte);
// Return a postfix byte added to each outgoing payload.
uint8_t GetPostfixByte() const;
// Force all encryptions to fail.
void SetFailEncryption(bool fail_encryption);
enum class FakeEncryptionStatus : int {
OK = 0,
FORCED_FAILURE = 1,
};
private:
uint8_t fake_key_ = 0;
uint8_t postfix_byte_ = 0;
bool fail_encryption_ = false;
};
} // namespace webrtc
#endif // API_TEST_FAKE_FRAME_ENCRYPTOR_H_
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