1 files changed, 173 insertions, 0 deletions
diff --git a/media/gmp-clearkey/0.1/gmp-clearkey.cpp b/media/gmp-clearkey/0.1/gmp-clearkey.cpp
new file mode 100644
index 0000000000..70c27602f7
--- /dev/null
+++ b/media/gmp-clearkey/0.1/gmp-clearkey.cpp
@@ -0,0 +1,173 @@
+/*
+ * Copyright 2015, Mozilla Foundation and contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <assert.h>
+// This include is required in order for content_decryption_module to work
+// on Unix systems.
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <string>
+#include <vector>
+
+#include "content_decryption_module.h"
+#include "content_decryption_module_ext.h"
+#include "nss.h"
+
+#include "ClearKeyCDM.h"
+#include "ClearKeySessionManager.h"
+#include "mozilla/dom/KeySystemNames.h"
+
+#ifndef XP_WIN
+#  include <sys/types.h>
+#  include <sys/stat.h>
+#  include <unistd.h>
+#endif
+
+#ifdef ENABLE_WMF
+#  include "WMFUtils.h"
+#endif  // ENABLE_WMF
+
+extern "C" {
+
+CDM_API
+void INITIALIZE_CDM_MODULE() {}
+
+static bool sCanReadHostVerificationFiles = false;
+
+CDM_API
+void* CreateCdmInstance(int cdm_interface_version, const char* key_system,
+                        uint32_t key_system_size,
+                        GetCdmHostFunc get_cdm_host_func, void* user_data) {
+  CK_LOGE("ClearKey CreateCDMInstance");
+
+  if (cdm_interface_version != cdm::ContentDecryptionModule_10::kVersion) {
+    CK_LOGE(
+        "ClearKey CreateCDMInstance failed due to requesting unsupported "
+        "version %d.",
+        cdm_interface_version);
+    return nullptr;
+  }
+#ifdef ENABLE_WMF
+  if (!wmf::EnsureLibs()) {
+    CK_LOGE("Required libraries were not found");
+    return nullptr;
+  }
+#endif
+
+  if (NSS_NoDB_Init(nullptr) == SECFailure) {
+    CK_LOGE("Unable to initialize NSS");
+    return nullptr;
+  }
+
+#ifdef MOZILLA_OFFICIAL
+  // Test that we're able to read the host files.
+  if (!sCanReadHostVerificationFiles) {
+    return nullptr;
+  }
+#endif
+
+  cdm::Host_10* host = static_cast<cdm::Host_10*>(
+      get_cdm_host_func(cdm_interface_version, user_data));
+  ClearKeyCDM* clearKey = new ClearKeyCDM(host);
+
+  CK_LOGE("Created ClearKeyCDM instance!");
+
+  if (strncmp(key_system, mozilla::kClearKeyWithProtectionQueryKeySystemName,
+              key_system_size) == 0) {
+    CK_LOGE("Enabling protection query on ClearKeyCDM instance!");
+    clearKey->EnableProtectionQuery();
+  }
+
+  return clearKey;
+}
+
+const size_t TEST_READ_SIZE = 16 * 1024;
+
+bool CanReadSome(cdm::PlatformFile aFile) {
+  std::vector<uint8_t> data;
+  data.resize(TEST_READ_SIZE);
+#ifdef XP_WIN
+  DWORD bytesRead = 0;
+  return ReadFile(aFile, &data.front(), TEST_READ_SIZE, &bytesRead, nullptr) &&
+         bytesRead > 0;
+#else
+  return read(aFile, &data.front(), TEST_READ_SIZE) > 0;
+#endif
+}
+
+void ClosePlatformFile(cdm::PlatformFile aFile) {
+#ifdef XP_WIN
+  CloseHandle(aFile);
+#else
+  close(aFile);
+#endif
+}
+
+static uint32_t NumExpectedHostFiles(const cdm::HostFile* aHostFiles,
+                                     uint32_t aNumFiles) {
+#if !defined(XP_WIN)
+  // We expect 4 binaries: clearkey, libxul, plugin-container, and Firefox.
+  return 4;
+#else
+  // Windows running x64 or x86 natively should also have 4 as above.
+  // For Windows on ARM64, we run an x86 plugin-contianer process under
+  // emulation, and so we expect one additional binary; the x86
+  // xul.dll used by plugin-container.exe.
+  bool i686underAArch64 = false;
+  // Assume that we're running under x86 emulation on an aarch64 host if
+  // one of the paths ends with the x86 plugin-container path we'd expect.
+  const std::wstring plugincontainer = L"i686\\plugin-container.exe";
+  for (uint32_t i = 0; i < aNumFiles; i++) {
+    const cdm::HostFile& hostFile = aHostFiles[i];
+    if (hostFile.file != cdm::kInvalidPlatformFile) {
+      std::wstring path = hostFile.file_path;
+      auto offset = path.find(plugincontainer);
+      if (offset != std::string::npos &&
+          offset == path.size() - plugincontainer.size()) {
+        i686underAArch64 = true;
+        break;
+      }
+    }
+  }
+  return i686underAArch64 ? 5 : 4;
+#endif
+}
+
+CDM_API
+bool VerifyCdmHost_0(const cdm::HostFile* aHostFiles, uint32_t aNumFiles) {
+  // Check that we've received the expected number of host files.
+  bool rv = (aNumFiles == NumExpectedHostFiles(aHostFiles, aNumFiles));
+  // Verify that each binary is readable inside the sandbox,
+  // and close the handle.
+  for (uint32_t i = 0; i < aNumFiles; i++) {
+    const cdm::HostFile& hostFile = aHostFiles[i];
+    if (hostFile.file != cdm::kInvalidPlatformFile) {
+      if (!CanReadSome(hostFile.file)) {
+        rv = false;
+      }
+      ClosePlatformFile(hostFile.file);
+    }
+    if (hostFile.sig_file != cdm::kInvalidPlatformFile) {
+      ClosePlatformFile(hostFile.sig_file);
+    }
+  }
+  sCanReadHostVerificationFiles = rv;
+  return rv;
+}
+
+}  // extern "C".