1 files changed, 69 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/test/vp8_decrypt_test.cc b/media/libvpx/libvpx/test/vp8_decrypt_test.cc
new file mode 100644
index 0000000000..bcac9d1a82
--- /dev/null
+++ b/media/libvpx/libvpx/test/vp8_decrypt_test.cc
@@ -0,0 +1,69 @@
+/*
+ *  Copyright (c) 2013 The WebM 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 <cstdio>
+#include <cstdlib>
+#include <string>
+#include <vector>
+#include "third_party/googletest/src/include/gtest/gtest.h"
+#include "test/codec_factory.h"
+#include "test/ivf_video_source.h"
+
+namespace {
+// In a real use the 'decrypt_state' parameter will be a pointer to a struct
+// with whatever internal state the decryptor uses. For testing we'll just
+// xor with a constant key, and decrypt_state will point to the start of
+// the original buffer.
+const uint8_t test_key[16] = { 0x01, 0x12, 0x23, 0x34, 0x45, 0x56, 0x67, 0x78,
+                               0x89, 0x9a, 0xab, 0xbc, 0xcd, 0xde, 0xef, 0xf0 };
+
+void encrypt_buffer(const uint8_t *src, uint8_t *dst, size_t size,
+                    ptrdiff_t offset) {
+  for (size_t i = 0; i < size; ++i) {
+    dst[i] = src[i] ^ test_key[(offset + i) & 15];
+  }
+}
+
+void test_decrypt_cb(void *decrypt_state, const uint8_t *input, uint8_t *output,
+                     int count) {
+  encrypt_buffer(input, output, count,
+                 input - reinterpret_cast<uint8_t *>(decrypt_state));
+}
+
+}  // namespace
+
+namespace libvpx_test {
+
+TEST(TestDecrypt, DecryptWorksVp8) {
+  libvpx_test::IVFVideoSource video("vp80-00-comprehensive-001.ivf");
+  video.Init();
+
+  vpx_codec_dec_cfg_t dec_cfg = vpx_codec_dec_cfg_t();
+  VP8Decoder decoder(dec_cfg, 0);
+
+  video.Begin();
+
+  // no decryption
+  vpx_codec_err_t res = decoder.DecodeFrame(video.cxdata(), video.frame_size());
+  ASSERT_EQ(VPX_CODEC_OK, res) << decoder.DecodeError();
+
+  // decrypt frame
+  video.Next();
+
+  std::vector<uint8_t> encrypted(video.frame_size());
+  encrypt_buffer(video.cxdata(), &encrypted[0], video.frame_size(), 0);
+  vpx_decrypt_init di = { test_decrypt_cb, &encrypted[0] };
+  decoder.Control(VPXD_SET_DECRYPTOR, &di);
+
+  res = decoder.DecodeFrame(&encrypted[0], encrypted.size());
+  ASSERT_EQ(VPX_CODEC_OK, res) << decoder.DecodeError();
+}
+
+}  // namespace libvpx_test