1 files changed, 70 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/test/fake_frame_decryptor.h b/third_party/libwebrtc/api/test/fake_frame_decryptor.h
new file mode 100644
index 0000000000..783bc805c4
--- /dev/null
+++ b/third_party/libwebrtc/api/test/fake_frame_decryptor.h
@@ -0,0 +1,70 @@
+/*
+ *  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_