fake_frame_decryptor.h (2712B)
1 /* 2 * Copyright 2018 The WebRTC 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 #ifndef API_TEST_FAKE_FRAME_DECRYPTOR_H_ 12 #define API_TEST_FAKE_FRAME_DECRYPTOR_H_ 13 14 #include <stddef.h> 15 #include <stdint.h> 16 17 #include <vector> 18 19 #include "api/array_view.h" 20 #include "api/crypto/frame_decryptor_interface.h" 21 #include "api/media_types.h" 22 23 namespace webrtc { 24 25 // The FakeFrameDecryptor is a TEST ONLY fake implementation of the 26 // FrameDecryptorInterface. It is constructed with a simple single digit key and 27 // a fixed postfix byte. This is just to validate that the core code works 28 // as expected. 29 class FakeFrameDecryptor : public FrameDecryptorInterface { 30 public: 31 // Provide a key (0,255) and some postfix byte (0,255) this should match the 32 // byte you expect from the FakeFrameEncryptor. 33 explicit FakeFrameDecryptor(uint8_t fake_key = 0xAA, 34 uint8_t expected_postfix_byte = 255); 35 // Fake decryption that just xors the payload with the 1 byte key and checks 36 // the postfix byte. This will always fail if fail_decryption_ is set to true. 37 Result Decrypt(MediaType media_type, 38 const std::vector<uint32_t>& csrcs, 39 ArrayView<const uint8_t> additional_data, 40 ArrayView<const uint8_t> encrypted_frame, 41 ArrayView<uint8_t> frame) override; 42 // Always returns 1 less than the size of the encrypted frame. 43 size_t GetMaxPlaintextByteSize(MediaType media_type, 44 size_t encrypted_frame_size) override; 45 // Sets the fake key to use for encryption. 46 void SetFakeKey(uint8_t fake_key); 47 // Returns the fake key used for encryption. 48 uint8_t GetFakeKey() const; 49 // Set the Postfix byte that is expected in the encrypted payload. 50 void SetExpectedPostfixByte(uint8_t expected_postfix_byte); 51 // Returns the postfix byte that will be checked for in the encrypted payload. 52 uint8_t GetExpectedPostfixByte() const; 53 // If set to true will force all encryption to fail. 54 void SetFailDecryption(bool fail_decryption); 55 // Simple error codes for tests to validate against. 56 enum class FakeDecryptStatus : int { 57 OK = 0, 58 FORCED_FAILURE = 1, 59 INVALID_POSTFIX = 2 60 }; 61 62 private: 63 uint8_t fake_key_ = 0; 64 uint8_t expected_postfix_byte_ = 0; 65 bool fail_decryption_ = false; 66 }; 67 68 } // namespace webrtc 69 70 #endif // API_TEST_FAKE_FRAME_DECRYPTOR_H_