Revert of Re-landing of issue 792353002 (patchset #1 id:1 of https://codereview.chromium.org/854693002/)

Reason for revert:
Speculative revert. I suppose that now it is breaking Linux GN:

http://build.chromium.org/p/chromium.linux/builders/Linux%20GN%20%28dbg%29/builds/20625/steps/compile/logs/stdio

Original issue's description:
> The purpose of this CL is to re-land issue 792353002 (https://codereview.chromium.org/792353002/), which landed, but was reverted due to a ChromiumOS GN build failure.  The failure was caused by a double inclusion of networking_private_credentials_getter_chromeos.cc.cc file in chrome_browser_extensions.gypi. This CL includes the original patch and the fix of the build failure.
>
> Original CL description follows:
>
> Refactoring of Cast-related crypto code to use the same certificate validation logic in chrome.networkingPrivate API and Cast Channel authentication.
>
> Here's what's being done here:
> * Code from cast_auth_util_nss/openssl formed the basis a common Cast device validation component in /src/extensions/common/cast/cast_cert_validator*, and is now being extensively cleaned up in response to rsleevi's comments in this CL.
> * Both networking_private_crypto* and cast_auth_util* have been updated to use the new common code.
> * The current D-Bus-based implementation of VerifyDestination is going away per discussion with ChromeOS team, and is replaced with in-Chrome code in networking_private crypto*.
>
> BUG=442650
>
> Committed: https://crrev.com/57988d1f46e6ce2a2d65aa87c01b29b2732a110f
> Cr-Commit-Position: refs/heads/master@{#312369}

TBR=rockot@chromium.org,stevenjb@chromium.org,brettw@chromium.org,mfoltz@chromium.org,vadimgo@chromium.org,mef@chromium.org,kmarshall@chromium.org,rsleevi@chromium.org,sheretov@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=442650

Review URL: https://codereview.chromium.org/865583003

Cr-Commit-Position: refs/heads/master@{#312391}

30 files changed, 737 insertions, 797 deletions

diff --git a/chrome/browser/extensions/api/networking_private/crypto_verify_impl.cc b/chrome/browser/extensions/api/networking_private/crypto_verify_impl.cc
index 1960a12..da34f3f 100644
--- a/chrome/browser/extensions/api/networking_private/crypto_verify_impl.cc
+++ b/chrome/browser/extensions/api/networking_private/crypto_verify_impl.cc
@@ -38,8 +38,8 @@ bool DecodeAndVerifyCredentials(
     return false;
   }
   *verified = networking_private_crypto::VerifyCredentials(
-      credentials.certificate, credentials.intermediate_certificates,
-      decoded_signed_data, credentials.unsigned_data, credentials.device_bssid);
+      credentials.certificate, decoded_signed_data, credentials.unsigned_data,
+      credentials.device_bssid);
   return true;
 }
 
@@ -158,8 +158,6 @@ void VerifyAndEncryptCredentialsCompleted(
 CryptoVerifyImpl::Credentials::Credentials(
     const VerificationProperties& properties) {
   certificate = properties.certificate;
-  if (properties.intermediate_certificates.get())
-    intermediate_certificates = *properties.intermediate_certificates;
   signed_data = properties.signed_data;
 
   std::vector<std::string> data_parts;
diff --git a/chrome/browser/extensions/api/networking_private/crypto_verify_impl.h b/chrome/browser/extensions/api/networking_private/crypto_verify_impl.h
index b35021a..bacdc5a 100644
--- a/chrome/browser/extensions/api/networking_private/crypto_verify_impl.h
+++ b/chrome/browser/extensions/api/networking_private/crypto_verify_impl.h
@@ -29,7 +29,6 @@ class CryptoVerifyImpl : public NetworkingPrivateDelegate::VerifyDelegate {
     ~Credentials();
 
     std::string certificate;
-    std::vector<std::string> intermediate_certificates;
     std::string signed_data;
     std::string unsigned_data;
     std::string device_bssid;
diff --git a/chrome/browser/extensions/api/networking_private/networking_private_chromeos_apitest.cc b/chrome/browser/extensions/api/networking_private/networking_private_chromeos_apitest.cc
index d2aa61c..ac57b5d 100644
--- a/chrome/browser/extensions/api/networking_private/networking_private_chromeos_apitest.cc
+++ b/chrome/browser/extensions/api/networking_private/networking_private_chromeos_apitest.cc
@@ -9,9 +9,6 @@
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/login/helper.h"
 #include "chrome/browser/chromeos/net/network_portal_detector_test_impl.h"
-#include "chrome/browser/extensions/api/networking_private/networking_private_chromeos.h"
-#include "chrome/browser/extensions/api/networking_private/networking_private_credentials_getter.h"
-#include "chrome/browser/extensions/api/networking_private/networking_private_delegate_factory.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/dbus/cryptohome_client.h"
@@ -64,10 +61,6 @@ using chromeos::ShillManagerClient;
 using chromeos::ShillProfileClient;
 using chromeos::ShillServiceClient;
 
-using extensions::NetworkingPrivateDelegate;
-using extensions::NetworkingPrivateDelegateFactory;
-using extensions::NetworkingPrivateChromeOS;
-
 namespace {
 
 const char kUser1ProfilePath[] = "/profile/user1/shill";
@@ -75,33 +68,6 @@ const char kWifiDevicePath[] = "/device/stub_wifi_device1";
 const char kCellularDevicePath[] = "/device/stub_cellular_device1";
 const char kIPConfigPath[] = "/ipconfig/ipconfig1";
 
-// Stub Verify* methods implementation to satisfy expectations of
-// networking_private_apitest.
-class CryptoVerifyStub : public NetworkingPrivateDelegate::VerifyDelegate {
-  void VerifyDestination(
-      const VerificationProperties& verification_properties,
-      const BoolCallback& success_callback,
-      const FailureCallback& failure_callback) override {
-    success_callback.Run(true);
-  }
-
-  void VerifyAndEncryptCredentials(
-      const std::string& guid,
-      const VerificationProperties& verification_properties,
-      const StringCallback& success_callback,
-      const FailureCallback& failure_callback) override {
-    success_callback.Run("encrypted_credentials");
-  }
-
-  void VerifyAndEncryptData(
-      const VerificationProperties& verification_properties,
-      const std::string& data,
-      const StringCallback& success_callback,
-      const FailureCallback& failure_callback) override {
-    success_callback.Run("encrypted_data");
-  }
-};
-
 class TestListener : public content::NotificationObserver {
  public:
   TestListener(const std::string& message, const base::Closure& callback)
@@ -230,12 +196,6 @@ class NetworkingPrivateChromeOSApiTest : public ExtensionApiTest {
                               true /* add_to_visible */);
   }
 
-  static KeyedService* CreateNetworkingPrivateServiceClient(
-      content::BrowserContext* profile) {
-    scoped_ptr<CryptoVerifyStub> crypto_verify(new CryptoVerifyStub);
-    return new NetworkingPrivateChromeOS(profile, crypto_verify.Pass());
-  }
-
   void SetUpOnMainThread() override {
     detector_ = new NetworkPortalDetectorTestImpl();
     NetworkPortalDetector::InitializeForTesting(detector_);
@@ -243,9 +203,6 @@ class NetworkingPrivateChromeOSApiTest : public ExtensionApiTest {
     ExtensionApiTest::SetUpOnMainThread();
     content::RunAllPendingInMessageLoop();
 
-    NetworkingPrivateDelegateFactory::GetInstance()->SetTestingFactory(
-        profile(), &CreateNetworkingPrivateServiceClient);
-
     InitializeSanitizedUsername();
 
     DBusThreadManager* dbus_manager = DBusThreadManager::Get();
diff --git a/chrome/browser/extensions/api/networking_private/networking_private_credentials_getter_chromeos.cc b/chrome/browser/extensions/api/networking_private/networking_private_credentials_getter_chromeos.cc
deleted file mode 100644
index a47b2e9..0000000
--- a/chrome/browser/extensions/api/networking_private/networking_private_credentials_getter_chromeos.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/browser/extensions/api/networking_private/networking_private_credentials_getter.h"
-
-const char kErrorNotImplemented[] = "Error.NotImplemented";
-
-namespace extensions {
-
-class NetworkingPrivateCredentialsGetterChromeos
-    : public NetworkingPrivateCredentialsGetter {
- public:
-  NetworkingPrivateCredentialsGetterChromeos() {}
-
-  void Start(const std::string& network_guid,
-             const std::string& public_key,
-             const CredentialsCallback& callback) override;
-
- private:
-  ~NetworkingPrivateCredentialsGetterChromeos() override;
-
-  DISALLOW_COPY_AND_ASSIGN(NetworkingPrivateCredentialsGetterChromeos);
-};
-
-NetworkingPrivateCredentialsGetterChromeos::
-    ~NetworkingPrivateCredentialsGetterChromeos() {
-}
-
-void NetworkingPrivateCredentialsGetterChromeos::Start(
-    const std::string& network_guid,
-    const std::string& public_key,
-    const CredentialsCallback& callback) {
-  // TODO(sheretov) add credential slurping from sync.
-  callback.Run(std::string(), kErrorNotImplemented);
-}
-
-NetworkingPrivateCredentialsGetter*
-NetworkingPrivateCredentialsGetter::Create() {
-  return new NetworkingPrivateCredentialsGetterChromeos();
-}
-
-}  // namespace extensions
diff --git a/chrome/browser/extensions/api/networking_private/networking_private_verify_delegate_chromeos.cc b/chrome/browser/extensions/api/networking_private/networking_private_verify_delegate_chromeos.cc
new file mode 100644
index 0000000..a4d06a1
--- /dev/null
+++ b/chrome/browser/extensions/api/networking_private/networking_private_verify_delegate_chromeos.cc
@@ -0,0 +1,114 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/extensions/api/networking_private/networking_private_verify_delegate_chromeos.h"
+
+#include "base/bind.h"
+#include "chrome/browser/extensions/api/networking_private/networking_private_api.h"
+#include "chrome/common/extensions/api/networking_private.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/shill_manager_client.h"
+#include "chromeos/network/network_handler.h"
+#include "chromeos/network/network_state.h"
+#include "chromeos/network/network_state_handler.h"
+
+using chromeos::ShillManagerClient;
+
+namespace {
+
+ShillManagerClient* GetShillManagerClient() {
+  return chromeos::DBusThreadManager::Get()->GetShillManagerClient();
+}
+
+bool GetServicePathFromGuid(const std::string& guid,
+                            std::string* service_path,
+                            std::string* error) {
+  const chromeos::NetworkState* network = chromeos::NetworkHandler::Get()
+                                              ->network_state_handler()
+                                              ->GetNetworkStateFromGuid(guid);
+  if (!network) {
+    *error = extensions::networking_private::kErrorInvalidNetworkGuid;
+    return false;
+  }
+  *service_path = network->path();
+  return true;
+}
+
+ShillManagerClient::VerificationProperties ConvertVerificationProperties(
+    const extensions::api::networking_private::VerificationProperties& input) {
+  ShillManagerClient::VerificationProperties output;
+  output.certificate = input.certificate;
+  output.public_key = input.public_key;
+  output.nonce = input.nonce;
+  output.signed_data = input.signed_data;
+  output.device_serial = input.device_serial;
+  output.device_ssid = input.device_ssid;
+  output.device_bssid = input.device_bssid;
+  return output;
+}
+
+void ShillFailureCallback(
+    const extensions::NetworkingPrivateDelegate::FailureCallback& callback,
+    const std::string& error_name,
+    const std::string& error_message) {
+  callback.Run(error_name);
+}
+
+}  // namespace
+
+namespace extensions {
+
+NetworkingPrivateVerifyDelegateChromeOS::
+    NetworkingPrivateVerifyDelegateChromeOS() {
+}
+
+NetworkingPrivateVerifyDelegateChromeOS::
+    ~NetworkingPrivateVerifyDelegateChromeOS() {
+}
+
+void NetworkingPrivateVerifyDelegateChromeOS::VerifyDestination(
+    const VerificationProperties& verification_properties,
+    const BoolCallback& success_callback,
+    const FailureCallback& failure_callback) {
+  ShillManagerClient::VerificationProperties verification_property_struct =
+      ConvertVerificationProperties(verification_properties);
+
+  GetShillManagerClient()->VerifyDestination(
+      verification_property_struct, success_callback,
+      base::Bind(&ShillFailureCallback, failure_callback));
+}
+
+void NetworkingPrivateVerifyDelegateChromeOS::VerifyAndEncryptCredentials(
+    const std::string& guid,
+    const VerificationProperties& verification_properties,
+    const StringCallback& success_callback,
+    const FailureCallback& failure_callback) {
+  std::string service_path, error;
+  if (!GetServicePathFromGuid(guid, &service_path, &error)) {
+    failure_callback.Run(error);
+    return;
+  }
+
+  ShillManagerClient::VerificationProperties verification_property_struct =
+      ConvertVerificationProperties(verification_properties);
+
+  GetShillManagerClient()->VerifyAndEncryptCredentials(
+      verification_property_struct, service_path, success_callback,
+      base::Bind(&ShillFailureCallback, failure_callback));
+}
+
+void NetworkingPrivateVerifyDelegateChromeOS::VerifyAndEncryptData(
+    const VerificationProperties& verification_properties,
+    const std::string& data,
+    const StringCallback& success_callback,
+    const FailureCallback& failure_callback) {
+  ShillManagerClient::VerificationProperties verification_property_struct =
+      ConvertVerificationProperties(verification_properties);
+
+  GetShillManagerClient()->VerifyAndEncryptData(
+      verification_property_struct, data, success_callback,
+      base::Bind(&ShillFailureCallback, failure_callback));
+}
+
+}  // namespace extensions
diff --git a/chrome/browser/extensions/api/networking_private/networking_private_verify_delegate_chromeos.h b/chrome/browser/extensions/api/networking_private/networking_private_verify_delegate_chromeos.h
new file mode 100644
index 0000000..dbef880
--- /dev/null
+++ b/chrome/browser/extensions/api/networking_private/networking_private_verify_delegate_chromeos.h
@@ -0,0 +1,38 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_VERIFY_DELEGATE_CHROMEOS_H_
+#define CHROME_BROWSER_EXTENSIONS_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_VERIFY_DELEGATE_CHROMEOS_H_
+
+#include "chrome/browser/extensions/api/networking_private/networking_private_delegate.h"
+
+namespace extensions {
+
+class NetworkingPrivateVerifyDelegateChromeOS
+    : public NetworkingPrivateDelegate::VerifyDelegate {
+ public:
+  NetworkingPrivateVerifyDelegateChromeOS();
+  ~NetworkingPrivateVerifyDelegateChromeOS() override;
+
+  void VerifyDestination(const VerificationProperties& verification_properties,
+                         const BoolCallback& success_callback,
+                         const FailureCallback& failure_callback) override;
+  void VerifyAndEncryptCredentials(
+      const std::string& guid,
+      const VerificationProperties& verification_properties,
+      const StringCallback& success_callback,
+      const FailureCallback& failure_callback) override;
+  void VerifyAndEncryptData(
+      const VerificationProperties& verification_properties,
+      const std::string& data,
+      const StringCallback& success_callback,
+      const FailureCallback& failure_callback) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NetworkingPrivateVerifyDelegateChromeOS);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_VERIFY_DELEGATE_CHROMEOS_H_
diff --git a/chrome/browser/extensions/api/networking_private/networking_private_verify_delegate_factory_impl.cc b/chrome/browser/extensions/api/networking_private/networking_private_verify_delegate_factory_impl.cc
index 44226d5..f2884d0 100644
--- a/chrome/browser/extensions/api/networking_private/networking_private_verify_delegate_factory_impl.cc
+++ b/chrome/browser/extensions/api/networking_private/networking_private_verify_delegate_factory_impl.cc
@@ -4,7 +4,11 @@
 
 #include "chrome/browser/extensions/api/networking_private/networking_private_verify_delegate_factory_impl.h"
 
+#if defined(OS_CHROMEOS)
+#include "chrome/browser/extensions/api/networking_private/networking_private_verify_delegate_chromeos.h"
+#elif defined(OS_WIN) || defined(OSMACOSX)
 #include "chrome/browser/extensions/api/networking_private/crypto_verify_impl.h"
+#endif
 
 namespace extensions {
 
@@ -18,7 +22,9 @@ NetworkingPrivateVerifyDelegateFactoryImpl::
 
 scoped_ptr<NetworkingPrivateDelegate::VerifyDelegate>
 NetworkingPrivateVerifyDelegateFactoryImpl::CreateDelegate() {
-#if defined(OS_CHROMEOS) || defined(OS_WIN) || defined(OS_MACOSX)
+#if defined(OS_CHROMEOS)
+  return make_scoped_ptr(new NetworkingPrivateVerifyDelegateChromeOS());
+#elif defined(OS_WIN) || defined(OSMACOSX)
   return make_scoped_ptr(new CryptoVerifyImpl());
 #else
   return nullptr;
diff --git a/chrome/chrome_browser_extensions.gypi b/chrome/chrome_browser_extensions.gypi
index 1100287..3d5a783 100644
--- a/chrome/chrome_browser_extensions.gypi
+++ b/chrome/chrome_browser_extensions.gypi
@@ -343,13 +343,10 @@
       'browser/extensions/api/music_manager_private/device_id_win.cc',
       'browser/extensions/api/music_manager_private/music_manager_private_api.cc',
       'browser/extensions/api/music_manager_private/music_manager_private_api.h',
-      'browser/extensions/api/networking_private/crypto_verify_impl.cc',
-      'browser/extensions/api/networking_private/crypto_verify_impl.h',
       'browser/extensions/api/networking_private/networking_private_api.cc',
       'browser/extensions/api/networking_private/networking_private_api.h',
       'browser/extensions/api/networking_private/networking_private_chromeos.cc',
       'browser/extensions/api/networking_private/networking_private_chromeos.h',
-      'browser/extensions/api/networking_private/networking_private_credentials_getter_chromeos.cc',
       'browser/extensions/api/networking_private/networking_private_delegate.cc',
       'browser/extensions/api/networking_private/networking_private_delegate.h',
       'browser/extensions/api/networking_private/networking_private_delegate_observer.h',
@@ -359,6 +356,8 @@
       'browser/extensions/api/networking_private/networking_private_event_router_factory.h',
       'browser/extensions/api/networking_private/networking_private_delegate_factory.cc',
       'browser/extensions/api/networking_private/networking_private_delegate_factory.h',
+      'browser/extensions/api/networking_private/networking_private_verify_delegate_chromeos.cc',
+      'browser/extensions/api/networking_private/networking_private_verify_delegate_chromeos.h',
       'browser/extensions/api/networking_private/networking_private_verify_delegate_factory_impl.cc',
       'browser/extensions/api/networking_private/networking_private_verify_delegate_factory_impl.h',
       'browser/extensions/api/notification_provider/notification_provider_api.cc',
diff --git a/chrome/chrome_common.gypi b/chrome/chrome_common.gypi
index 028de4f..83a320d 100644
--- a/chrome/chrome_common.gypi
+++ b/chrome/chrome_common.gypi
@@ -252,23 +252,16 @@
       'common/service_process_util_win.cc',
     ],
     'chrome_common_win_mac_sources': [
+      'common/extensions/api/networking_private/networking_private_crypto_nss.cc',
+      'common/extensions/api/networking_private/networking_private_crypto_openssl.cc',
+      'common/extensions/api/networking_private/networking_private_crypto.cc',
+      'common/extensions/api/networking_private/networking_private_crypto.h',
       'common/media_galleries/itunes_library.cc',
       'common/media_galleries/itunes_library.h',
       'common/media_galleries/picasa_types.cc',
       'common/media_galleries/picasa_types.h',
       'common/media_galleries/pmp_constants.h',
     ],
-    'chrome_common_networking_private_sources_openssl' : [
-      'common/extensions/api/networking_private/networking_private_crypto_openssl.cc',
-      'common/extensions/api/networking_private/networking_private_crypto.cc',
-      'common/extensions/api/networking_private/networking_private_crypto.h',
-    ],
-    'chrome_common_networking_private_sources_nss' : [
-      'common/extensions/api/networking_private/networking_private_crypto_nss.cc',
-      'common/extensions/api/networking_private/networking_private_crypto.cc',
-      'common/extensions/api/networking_private/networking_private_crypto.h',
-    ],
-
     'chrome_common_mac_sources': [
       'common/media_galleries/iphoto_library.cc',
       'common/media_galleries/iphoto_library.h',
@@ -351,15 +344,12 @@
         ['OS=="win" or OS=="mac"', {
           'sources': [ '<@(chrome_common_win_mac_sources)' ],
         }],
-        ['(OS=="win" or OS=="mac" or chromeos==1) and use_openssl==1', {
-          'sources': [ '<@(chrome_common_networking_private_sources_openssl)' ],
+        ['(OS=="win" or OS=="mac") and use_openssl==1', {
+          # networking_private_crypto_openssl.cc depends on boringssl.
           'dependencies': [
             '../third_party/boringssl/boringssl.gyp:boringssl',
           ],
         }],
-        ['(OS=="win" or OS=="mac" or chromeos==1) and use_openssl!=1', {
-          'sources': [ '<@(chrome_common_networking_private_sources_nss)' ],
-        }],
         ['OS=="mac"', {
           'sources': [ '<@(chrome_common_mac_sources)' ],
         }],
@@ -503,6 +493,17 @@
         ['safe_browsing==2', {
           'defines': [ 'MOBILE_SAFE_BROWSING' ],
         }],
+        ['use_openssl==1', {
+           'sources!': [
+             'common/extensions/api/networking_private/networking_private_crypto_nss.cc',
+           ],
+         },
+         {  # else !use_openssl
+           'sources!': [
+             'common/extensions/api/networking_private/networking_private_crypto_openssl.cc',
+           ],
+         },
+        ],
       ],
       'target_conditions': [
         ['OS == "ios"', {
diff --git a/chrome/chrome_tests_unit.gypi b/chrome/chrome_tests_unit.gypi
index d66a6e5..546cffa 100644
--- a/chrome/chrome_tests_unit.gypi
+++ b/chrome/chrome_tests_unit.gypi
@@ -2422,11 +2422,6 @@
         ['OS=="win" or OS=="mac"', {
           'sources': [ '<@(chrome_unit_tests_win_mac_sources)' ],
         }],
-        ['OS=="win" or OS=="mac" or chromeos==1', {
-          'sources': [
-            'common/extensions/api/networking_private/networking_private_crypto_unittest.cc',
-          ],
-        }],
         ['enable_rlz!=0', {
           'dependencies': [
             '../rlz/rlz.gyp:test_support_rlz',
diff --git a/chrome/common/BUILD.gn b/chrome/common/BUILD.gn
index d6a03e0..6fd6111 100644
--- a/chrome/common/BUILD.gn
+++ b/chrome/common/BUILD.gn
@@ -114,23 +114,15 @@ static_library("common") {
   if (is_win || is_mac) {
     sources +=
         rebase_path(gypi_values.chrome_common_win_mac_sources, ".", "//chrome")
-    deps += [ "//breakpad:client" ]
-  }
-  if (is_win || is_mac || is_chromeos) {
     if (use_openssl) {
-      sources += rebase_path(
-              gypi_values.chrome_common_networking_private_sources_openssl,
-              ".",
-              "//chrome")
+      sources -= [ "extensions/api/networking_private/networking_private_crypto_nss.cc" ]
 
       # networking_private_crypto_openssl.cc depends on boringssl.
       deps += [ "//third_party/boringssl" ]
     } else {
-      sources +=
-          rebase_path(gypi_values.chrome_common_networking_private_sources_nss,
-                      ".",
-                      "//chrome")
+      sources -= [ "extensions/api/networking_private/networking_private_crypto_openssl.cc" ]
     }
+    deps += [ "//breakpad:client" ]
   }
   if (is_mac) {
     sources +=
diff --git a/chrome/common/extensions/api/networking_private.json b/chrome/common/extensions/api/networking_private.json
index 8e73463..bac9fea 100644
--- a/chrome/common/extensions/api/networking_private.json
+++ b/chrome/common/extensions/api/networking_private.json
@@ -27,17 +27,11 @@
         "properties": {
           "certificate": {
             "type": "string",
-            "description": "A string containing a PEM-encoded (including the \"BEGIN CERTIFICATE\" header and \"END CERTIFICATE\" footer) X.509 certificate for use in verifying the signed data."
-          },
-          "intermediateCertificates": {
-            "type": "array",
-            "items": { "type": "string" },
-            "optional": true,
-            "description": "An array of PEM-encoded X.509 intermediate certificate authority certificates. Each PEM-encoded certificate is expected to have the \"BEGIN CERTIFICATE\" header and \"END CERTIFICATE\" footer."
+            "description": "A string containing a PEM-encoded X.509 certificate for use in verifying the signed data."
           },
           "publicKey": {
             "type": "string",
-            "description": "A string containing a Base64-encoded RSAPublicKey ASN.1 structure, representing the public key to be used by verifyAndEncryptCredentials and verifyAndEncryptData methods."
+            "description": "A string containing a PEM-encoded RSA public key to be used to compare with the one in signedData"
           },
           "nonce": {
             "type": "string",
diff --git a/chrome/common/extensions/api/networking_private/networking_private_crypto.cc b/chrome/common/extensions/api/networking_private/networking_private_crypto.cc
index 66af2f9..34c2776 100644
--- a/chrome/common/extensions/api/networking_private/networking_private_crypto.cc
+++ b/chrome/common/extensions/api/networking_private/networking_private_crypto.cc
@@ -4,82 +4,33 @@
 
 #include "chrome/common/extensions/api/networking_private/networking_private_crypto.h"
 
-#include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/strings/string_util.h"
-#include "extensions/common/cast/cast_cert_validator.h"
-#include "net/cert/pem_tokenizer.h"
-
-namespace {
-
-namespace cast_crypto = ::extensions::core_api::cast_crypto;
-
-}  // namespace
-
 namespace networking_private_crypto {
 
-bool VerifyCredentials(
-    const std::string& certificate,
-    const std::vector<std::string>& intermediate_certificates,
-    const std::string& signature,
-    const std::string& data,
-    const std::string& connected_mac) {
-  static const char kErrorPrefix[] = "Device verification failed. ";
-
-  std::vector<std::string> headers;
-  headers.push_back("CERTIFICATE");
-
-  // Convert certificate from PEM to raw DER
-  net::PEMTokenizer pem_tok(certificate, headers);
-  if (!pem_tok.GetNext()) {
-    LOG(ERROR) << kErrorPrefix << "Failed to parse device certificate.";
-    return false;
-  }
-  std::string der_certificate = pem_tok.data();
-
-  // Convert intermediate certificates from PEM to raw DER
-  std::vector<std::string> der_intermediate_certificates;
-  for (size_t idx = 0; idx < intermediate_certificates.size(); ++idx) {
-    net::PEMTokenizer ica_pem_tok(intermediate_certificates[idx], headers);
-    if (ica_pem_tok.GetNext()) {
-      der_intermediate_certificates.push_back(ica_pem_tok.data());
-    } else {
-      LOG(WARNING) << "Failed to parse intermediate certificates.";
-    }
-  }
-
-  // Verify device certificate
-  scoped_ptr<cast_crypto::CertVerificationContext> verification_context;
-  cast_crypto::VerificationResult verification_result =
-      cast_crypto::VerifyDeviceCert(der_certificate,
-                                    der_intermediate_certificates,
-                                    &verification_context);
-
-  if (verification_result.Failure()) {
-    LOG(ERROR) << kErrorPrefix << verification_result.GetLogString();
-    return false;
-  }
-
-  // Check that the device listed in the certificate is correct.
-  // Something like evt_e161 001a11ffacdf
-  std::string common_name = verification_context->GetCommonName();
-  std::string translated_mac;
-  base::RemoveChars(connected_mac, ":", &translated_mac);
-  if (!EndsWith(common_name, translated_mac, false)) {
-    LOG(ERROR) << kErrorPrefix << "MAC addresses don't match.";
-    return false;
-  }
-
-  // Use the public key from verified certificate to verify |signature| over
-  // |data|.
-  verification_result =
-      verification_context->VerifySignatureOverData(signature, data);
-
-  if (verification_result.Failure()) {
-    LOG(ERROR) << kErrorPrefix << verification_result.GetLogString();
-    return false;
-  }
-  return true;
-}
+const uint8 kTrustedCAPublicKeyDER[] = {
+    0x30, 0x82, 0x01, 0x0a, 0x02, 0x82, 0x01, 0x01, 0x00, 0xbc, 0x22, 0x80,
+    0xbd, 0x80, 0xf6, 0x3a, 0x21, 0x00, 0x3b, 0xae, 0x76, 0x5e, 0x35, 0x7f,
+    0x3d, 0xc3, 0x64, 0x5c, 0x55, 0x94, 0x86, 0x34, 0x2f, 0x05, 0x87, 0x28,
+    0xcd, 0xf7, 0x69, 0x8c, 0x17, 0xb3, 0x50, 0xa7, 0xb8, 0x82, 0xfa, 0xdf,
+    0xc7, 0x43, 0x2d, 0xd6, 0x7e, 0xab, 0xa0, 0x6f, 0xb7, 0x13, 0x72, 0x80,
+    0xa4, 0x47, 0x15, 0xc1, 0x20, 0x99, 0x50, 0xcd, 0xec, 0x14, 0x62, 0x09,
+    0x5b, 0xa4, 0x98, 0xcd, 0xd2, 0x41, 0xb6, 0x36, 0x4e, 0xff, 0xe8, 0x2e,
+    0x32, 0x30, 0x4a, 0x81, 0xa8, 0x42, 0xa3, 0x6c, 0x9b, 0x33, 0x6e, 0xca,
+    0xb2, 0xf5, 0x53, 0x66, 0xe0, 0x27, 0x53, 0x86, 0x1a, 0x85, 0x1e, 0xa7,
+    0x39, 0x3f, 0x4a, 0x77, 0x8e, 0xfb, 0x54, 0x66, 0x66, 0xfb, 0x58, 0x54,
+    0xc0, 0x5e, 0x39, 0xc7, 0xf5, 0x50, 0x06, 0x0b, 0xe0, 0x8a, 0xd4, 0xce,
+    0xe1, 0x6a, 0x55, 0x1f, 0x8b, 0x17, 0x00, 0xe6, 0x69, 0xa3, 0x27, 0xe6,
+    0x08, 0x25, 0x69, 0x3c, 0x12, 0x9d, 0x8d, 0x05, 0x2c, 0xd6, 0x2e, 0xa2,
+    0x31, 0xde, 0xb4, 0x52, 0x50, 0xd6, 0x20, 0x49, 0xde, 0x71, 0xa0, 0xf9,
+    0xad, 0x20, 0x40, 0x12, 0xf1, 0xdd, 0x25, 0xeb, 0xd5, 0xe6, 0xb8, 0x36,
+    0xf4, 0xd6, 0x8f, 0x7f, 0xca, 0x43, 0xdc, 0xd7, 0x10, 0x5b, 0xe6, 0x3f,
+    0x51, 0x8a, 0x85, 0xb3, 0xf3, 0xff, 0xf6, 0x03, 0x2d, 0xcb, 0x23, 0x4f,
+    0x9c, 0xad, 0x18, 0xe7, 0x93, 0x05, 0x8c, 0xac, 0x52, 0x9a, 0xf7, 0x4c,
+    0xe9, 0x99, 0x7a, 0xbe, 0x6e, 0x7e, 0x4d, 0x0a, 0xe3, 0xc6, 0x1c, 0xa9,
+    0x93, 0xfa, 0x3a, 0xa5, 0x91, 0x5d, 0x1c, 0xbd, 0x66, 0xeb, 0xcc, 0x60,
+    0xdc, 0x86, 0x74, 0xca, 0xcf, 0xf8, 0x92, 0x1c, 0x98, 0x7d, 0x57, 0xfa,
+    0x61, 0x47, 0x9e, 0xab, 0x80, 0xb7, 0xe4, 0x48, 0x80, 0x2a, 0x92, 0xc5,
+    0x1b, 0x02, 0x03, 0x01, 0x00, 0x01};
+
+const size_t kTrustedCAPublicKeyDERLength = sizeof(kTrustedCAPublicKeyDER);
 
 }  // namespace networking_private_crypto
diff --git a/chrome/common/extensions/api/networking_private/networking_private_crypto.h b/chrome/common/extensions/api/networking_private/networking_private_crypto.h
index 8940c0b..e613293 100644
--- a/chrome/common/extensions/api/networking_private/networking_private_crypto.h
+++ b/chrome/common/extensions/api/networking_private/networking_private_crypto.h
@@ -20,12 +20,10 @@ namespace networking_private_crypto {
 // 2) The certificate is a valid PEM encoded certificate signed by trusted CA.
 // 3) |signature| is a valid signature for |data|, using the public key in
 // |certificate|
-bool VerifyCredentials(
-    const std::string& certificate,
-    const std::vector<std::string>& intermediate_certificates,
-    const std::string& signature,
-    const std::string& data,
-    const std::string& connected_mac);
+bool VerifyCredentials(const std::string& certificate,
+                       const std::string& signature,
+                       const std::string& data,
+                       const std::string& connected_mac);
 
 // Encrypt |data| with |public_key|. |public_key| is a DER-encoded
 // RSAPublicKey. |data| is some string of bytes that is smaller than the
@@ -46,6 +44,12 @@ bool DecryptByteString(const std::string& private_key_pem,
                        const std::vector<uint8_t>& encrypted_data,
                        std::string* decrypted_output);
 
+// The trusted public key as a DER-encoded PKCS#1 RSAPublicKey structure.
+extern const uint8_t kTrustedCAPublicKeyDER[];
+
+// The length of |kTrustedCAPublicKeyDER| in bytes.
+extern const size_t kTrustedCAPublicKeyDERLength;
+
 }  // namespace networking_private_crypto
 
 #endif  // CHROME_COMMON_EXTENSIONS_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_CRYPTO_H_
diff --git a/chrome/common/extensions/api/networking_private/networking_private_crypto_nss.cc b/chrome/common/extensions/api/networking_private/networking_private_crypto_nss.cc
index 0839762..2cdc33b 100644
--- a/chrome/common/extensions/api/networking_private/networking_private_crypto_nss.cc
+++ b/chrome/common/extensions/api/networking_private/networking_private_crypto_nss.cc
@@ -46,6 +46,94 @@ bool GetDERFromPEM(const std::string& pem_data,
 
 namespace networking_private_crypto {
 
+bool VerifyCredentials(const std::string& certificate,
+                       const std::string& signature,
+                       const std::string& data,
+                       const std::string& connected_mac) {
+  crypto::EnsureNSSInit();
+
+  std::vector<uint8_t> cert_data;
+  if (!GetDERFromPEM(certificate, "CERTIFICATE", &cert_data)) {
+    LOG(ERROR) << "Failed to parse certificate.";
+    return false;
+  }
+  SECItem der_cert;
+  der_cert.type = siDERCertBuffer;
+  der_cert.data = cert_data.data();
+  der_cert.len = cert_data.size();
+
+  // Parse into a certificate structure.
+  typedef scoped_ptr<
+      CERTCertificate,
+      crypto::NSSDestroyer<CERTCertificate, CERT_DestroyCertificate> >
+      ScopedCERTCertificate;
+  ScopedCERTCertificate cert(CERT_NewTempCertificate(
+      CERT_GetDefaultCertDB(), &der_cert, NULL, PR_FALSE, PR_TRUE));
+  if (!cert.get()) {
+    LOG(ERROR) << "Failed to parse certificate.";
+    return false;
+  }
+
+  // Check that the certificate is signed by trusted CA.
+  SECItem trusted_ca_key_der_item;
+  trusted_ca_key_der_item.type = siDERCertBuffer;
+  trusted_ca_key_der_item.data =
+      const_cast<unsigned char*>(kTrustedCAPublicKeyDER);
+  trusted_ca_key_der_item.len = kTrustedCAPublicKeyDERLength;
+  crypto::ScopedSECKEYPublicKey ca_public_key(
+      SECKEY_ImportDERPublicKey(&trusted_ca_key_der_item, CKK_RSA));
+  SECStatus verified = CERT_VerifySignedDataWithPublicKey(
+      &cert->signatureWrap, ca_public_key.get(), NULL);
+  if (verified != SECSuccess) {
+    LOG(ERROR) << "Certificate is not issued by the trusted CA.";
+    return false;
+  }
+
+  // Check that the device listed in the certificate is correct.
+  // Something like evt_e161 001a11ffacdf
+  char* common_name = CERT_GetCommonName(&cert->subject);
+  if (!common_name) {
+    LOG(ERROR) << "Certificate does not have common name.";
+    return false;
+  }
+
+  std::string subject_name(common_name);
+  PORT_Free(common_name);
+  std::string translated_mac;
+  base::RemoveChars(connected_mac, ":", &translated_mac);
+  if (!EndsWith(subject_name, translated_mac, false)) {
+    LOG(ERROR) << "MAC addresses don't match.";
+    return false;
+  }
+
+  // Make sure that the certificate matches the unsigned data presented.
+  // Verify that the |signature| matches |data|.
+  crypto::ScopedSECKEYPublicKey public_key(CERT_ExtractPublicKey(cert.get()));
+  if (!public_key.get()) {
+    LOG(ERROR) << "Unable to extract public key from certificate.";
+    return false;
+  }
+  SECItem signature_item;
+  signature_item.type = siBuffer;
+  signature_item.data =
+      reinterpret_cast<unsigned char*>(const_cast<char*>(signature.c_str()));
+  signature_item.len = static_cast<unsigned int>(signature.size());
+  verified = VFY_VerifyDataDirect(
+      reinterpret_cast<unsigned char*>(const_cast<char*>(data.c_str())),
+      data.size(),
+      public_key.get(),
+      &signature_item,
+      SEC_OID_PKCS1_RSA_ENCRYPTION,
+      SEC_OID_SHA1,
+      NULL,
+      NULL);
+  if (verified != SECSuccess) {
+    LOG(ERROR) << "Signed blobs did not match.";
+    return false;
+  }
+  return true;
+}
+
 bool EncryptByteString(const std::vector<uint8_t>& pub_key_der,
                        const std::string& data,
                        std::vector<uint8_t>* encrypted_output) {
diff --git a/chrome/common/extensions/api/networking_private/networking_private_crypto_openssl.cc b/chrome/common/extensions/api/networking_private/networking_private_crypto_openssl.cc
index 2a22065..e08b51d 100644
--- a/chrome/common/extensions/api/networking_private/networking_private_crypto_openssl.cc
+++ b/chrome/common/extensions/api/networking_private/networking_private_crypto_openssl.cc
@@ -10,6 +10,7 @@
 #include <openssl/x509.h>
 
 #include "base/logging.h"
+#include "base/strings/string_util.h"
 #include "crypto/openssl_util.h"
 #include "crypto/rsa_private_key.h"
 #include "crypto/scoped_openssl_types.h"
@@ -17,6 +18,8 @@
 
 namespace {
 
+typedef crypto::ScopedOpenSSL<X509, X509_free>::Type ScopedX509;
+
 // Parses |pem_data| for a PEM block of |pem_type|.
 // Returns true if a |pem_type| block is found, storing the decoded result in
 // |der_output|.
@@ -38,6 +41,106 @@ bool GetDERFromPEM(const std::string& pem_data,
 
 namespace networking_private_crypto {
 
+bool VerifyCredentials(const std::string& certificate,
+                       const std::string& signature,
+                       const std::string& data,
+                       const std::string& connected_mac) {
+  crypto::EnsureOpenSSLInit();
+  crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE);
+
+  std::vector<uint8_t> cert_data;
+  if (!GetDERFromPEM(certificate, "CERTIFICATE", &cert_data)) {
+    LOG(ERROR) << "Failed to parse certificate.";
+    return false;
+  }
+
+  // Parse into an OpenSSL X509.
+  const uint8_t* ptr = cert_data.empty() ? NULL : &cert_data[0];
+  const uint8_t* end = ptr + cert_data.size();
+  ScopedX509 cert(d2i_X509(NULL, &ptr, cert_data.size()));
+  if (!cert || ptr != end) {
+    LOG(ERROR) << "Failed to parse certificate.";
+    return false;
+  }
+
+  // Import the trusted public key.
+  ptr = kTrustedCAPublicKeyDER;
+  crypto::ScopedRSA ca_public_key_rsa(
+      d2i_RSAPublicKey(NULL, &ptr, kTrustedCAPublicKeyDERLength));
+  if (!ca_public_key_rsa ||
+      ptr != kTrustedCAPublicKeyDER + kTrustedCAPublicKeyDERLength) {
+    NOTREACHED();
+    LOG(ERROR) << "Failed to import trusted public key.";
+    return false;
+  }
+  crypto::ScopedEVP_PKEY ca_public_key(EVP_PKEY_new());
+  if (!ca_public_key ||
+      !EVP_PKEY_set1_RSA(ca_public_key.get(), ca_public_key_rsa.get())) {
+    LOG(ERROR) << "Failed to initialize EVP_PKEY";
+    return false;
+  }
+
+  // Check that the certificate is signed by the trusted public key.
+  if (X509_verify(cert.get(), ca_public_key.get()) <= 0) {
+    LOG(ERROR) << "Certificate is not issued by the trusted CA.";
+    return false;
+  }
+
+  // Check that the device listed in the certificate is correct.
+  // Something like evt_e161 001a11ffacdf
+  std::string common_name;
+  int common_name_length = X509_NAME_get_text_by_NID(
+      cert->cert_info->subject, NID_commonName, NULL, 0);
+  if (common_name_length < 0) {
+    LOG(ERROR) << "Certificate does not have common name.";
+    return false;
+  }
+  if (common_name_length > 0) {
+    common_name_length = X509_NAME_get_text_by_NID(
+        cert->cert_info->subject,
+        NID_commonName,
+        WriteInto(&common_name, common_name_length + 1),
+        common_name_length + 1);
+    DCHECK_EQ((int)common_name.size(), common_name_length);
+    if (common_name_length < 0) {
+      LOG(ERROR) << "Certificate does not have common name.";
+      return false;
+    }
+    common_name.resize(common_name_length);
+  }
+
+  std::string translated_mac;
+  base::RemoveChars(connected_mac, ":", &translated_mac);
+  if (!EndsWith(common_name, translated_mac, false)) {
+    LOG(ERROR) << "MAC addresses don't match.";
+    return false;
+  }
+
+  // Make sure that the certificate matches the unsigned data presented.
+  // Verify that the |signature| matches |data|.
+  crypto::ScopedEVP_PKEY public_key(X509_get_pubkey(cert.get()));
+  if (!public_key) {
+    LOG(ERROR) << "Unable to extract public key from certificate.";
+    return false;
+  }
+
+  crypto::ScopedEVP_MD_CTX ctx(EVP_MD_CTX_create());
+  if (!ctx) {
+    LOG(ERROR) << "Unable to allocate EVP_MD_CTX.";
+    return false;
+  }
+  if (EVP_DigestVerifyInit(
+          ctx.get(), NULL, EVP_sha1(), NULL, public_key.get()) <= 0 ||
+      EVP_DigestVerifyUpdate(ctx.get(), data.data(), data.size()) <= 0 ||
+      EVP_DigestVerifyFinal(ctx.get(),
+                            reinterpret_cast<const uint8_t*>(signature.data()),
+                            signature.size()) <= 0) {
+    LOG(ERROR) << "Signed blobs did not match.";
+    return false;
+  }
+  return true;
+}
+
 bool EncryptByteString(const std::vector<uint8_t>& pub_key_der,
                        const std::string& data,
                        std::vector<uint8_t>* encrypted_output) {
diff --git a/chrome/common/extensions/api/networking_private/networking_private_crypto_unittest.cc b/chrome/common/extensions/api/networking_private/networking_private_crypto_unittest.cc
index 15bd935..d482d59 100644
--- a/chrome/common/extensions/api/networking_private/networking_private_crypto_unittest.cc
+++ b/chrome/common/extensions/api/networking_private/networking_private_crypto_unittest.cc
@@ -46,30 +46,6 @@ TEST_F(NetworkingPrivateCryptoTest, VerifyCredentials) {
       "wM9asRj3tJA5VRFbLbsit1VI7IaRCk9rsSKkpBUaVeKbPLz+y/Z6JonXXT6AxsfgUSKDd4B7"
       "MYLrTwMQfGuUaaaKko6ldKIrovjrcPloQr1Hxb2bipFcjLmG7nxQLoS6vQ=="
       "-----END CERTIFICATE-----";
-  static const char kICAData[] =
-      "-----BEGIN CERTIFICATE-----"
-      "MIIDzTCCArWgAwIBAgIBAzANBgkqhkiG9w0BAQUFADB1MQswCQYDVQQGEwJVUzET"
-      "MBEGA1UECAwKQ2FsaWZvcm5pYTEWMBQGA1UEBwwNTW91bnRhaW4gVmlldzETMBEG"
-      "A1UECgwKR29vZ2xlIEluYzENMAsGA1UECwwEQ2FzdDEVMBMGA1UEAwwMQ2FzdCBS"
-      "b290IENBMB4XDTE0MDQwMjIwNTg1NFoXDTE5MDQwMjIwNTg1NFowfTELMAkGA1UE"
-      "BhMCVVMxEzARBgNVBAgMCkNhbGlmb3JuaWExFjAUBgNVBAcMDU1vdW50YWluIFZp"
-      "ZXcxEzARBgNVBAoMCkdvb2dsZSBJbmMxEjAQBgNVBAsMCUdvb2dsZSBUVjEYMBYG"
-      "A1UEAwwPRXVyZWthIEdlbjEgSUNBMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIB"
-      "CgKCAQEAvCKAvYD2OiEAO652XjV/PcNkXFWUhjQvBYcozfdpjBezUKe4gvrfx0Mt"
-      "1n6roG+3E3KApEcVwSCZUM3sFGIJW6SYzdJBtjZO/+guMjBKgahCo2ybM27KsvVT"
-      "ZuAnU4YahR6nOT9Kd477VGZm+1hUwF45x/VQBgvgitTO4WpVH4sXAOZpoyfmCCVp"
-      "PBKdjQUs1i6iMd60UlDWIEnecaD5rSBAEvHdJevV5rg29NaPf8pD3NcQW+Y/UYqF"
-      "s/P/9gMtyyNPnK0Y55MFjKxSmvdM6Zl6vm5+TQrjxhypk/o6pZFdHL1m68xg3IZ0"
-      "ys/4khyYfVf6YUeeq4C35EiAKpLFGwIDAQABo2AwXjAPBgNVHRMECDAGAQH/AgEA"
-      "MB0GA1UdDgQWBBQyr35sod0oQuWz4VmnWjnJ/4pinzAfBgNVHSMEGDAWgBR8mh59"
-      "33lUvNfMXsqZhkV5ZXQoGTALBgNVHQ8EBAMCAQYwDQYJKoZIhvcNAQEFBQADggEB"
-      "ABPENY9iGt6qsc5yq4JOO6EEqYbKVtkSf1AqW2yJc4M4EZ65eA6bpj9EVIKvDxYq"
-      "NI7q40f7jCXiS+Y73OXFaC3Xue8+DV7WVjAvf9QYy79ohnbqadA4U/Sb7vw4AzwT"
-      "KCMlH2fUJ5PCNFfTj6lAkeZOhxtegnEMTIB8zvXEb42H0hN4UxRRhCeKS9tIlAmI"
-      "Ql1ib0jTDDN6IgQYslrx0dyZzBAsRocq/d3ycXX71iMykoIHZ7rNJ2bDMddRdFk2"
-      "D0Ljj4fZjrQNyD4mot/9mqSrF1Q2/AdWQO3pJONcXRWRynJ4Ian3sWdq2B5Dq8Iz"
-      "kqrjM7lOq9YEQ+hMRdmOHP4="
-      "-----END CERTIFICATE-----";
   static const char kName[] = "eureka8997";
   static const char kSsdpUdn[] = "c5b2a83b-5958-7ce6-b179-e1f44699429b";
   static const char kHotspotBssid[] = "00:1A:11:FF:AC:DF";
@@ -115,43 +91,26 @@ TEST_F(NetworkingPrivateCryptoTest, VerifyCredentials) {
 
   // Checking basic verification operation.
   EXPECT_TRUE(networking_private_crypto::VerifyCredentials(
-      kCertData, std::vector<std::string>(), signed_data, unsigned_data,
-      kHotspotBssid));
-
-  // Checking verification operation with an ICA
-  std::vector<std::string> icas;
-  icas.push_back(kICAData);
-  EXPECT_TRUE(networking_private_crypto::VerifyCredentials(
-      kCertData, icas, signed_data, unsigned_data, kHotspotBssid));
+      kCertData, signed_data, unsigned_data, kHotspotBssid));
 
   // Checking that verification fails when the certificate is signed, but
   // subject is malformed.
   EXPECT_FALSE(networking_private_crypto::VerifyCredentials(
-      kBadSubjectCertData, std::vector<std::string>(), signed_data,
-      unsigned_data, kHotspotBssid));
+      kBadSubjectCertData, signed_data, unsigned_data, kHotspotBssid));
 
   // Checking that verification fails when certificate has invalid format.
   EXPECT_FALSE(networking_private_crypto::VerifyCredentials(
-      kBadCertData, std::vector<std::string>(), signed_data, unsigned_data,
-      kHotspotBssid));
-
-  // Checking that verification fails if we supply a bad ICA.
-  std::vector<std::string> bad_icas;
-  bad_icas.push_back(kCertData);
-  EXPECT_FALSE(networking_private_crypto::VerifyCredentials(
-      kCertData, bad_icas, signed_data, unsigned_data, kHotspotBssid));
+      kBadCertData, signed_data, unsigned_data, kHotspotBssid));
 
   // Checking that verification fails when Hotspot Bssid is invalid.
   EXPECT_FALSE(networking_private_crypto::VerifyCredentials(
-      kCertData, std::vector<std::string>(), signed_data, unsigned_data,
-      kBadHotspotBssid));
+      kCertData, signed_data, unsigned_data, kBadHotspotBssid));
 
   // Checking that verification fails when there is bad nonce in unsigned_data.
   unsigned_data = base::StringPrintf(
       "%s,%s,%s,%s,%s", kName, kSsdpUdn, kHotspotBssid, kPublicKey, kBadNonce);
   EXPECT_FALSE(networking_private_crypto::VerifyCredentials(
-      kCertData, std::vector<std::string>(), signed_data, unsigned_data,
-      kHotspotBssid));
+      kCertData, signed_data, unsigned_data, kHotspotBssid));
 }
 
 // Test that networking_private_crypto::EncryptByteString behaves as expected.
diff --git a/chrome/test/data/extensions/api_test/networking/test.js b/chrome/test/data/extensions/api_test/networking/test.js
index 6bd2292..9024129 100644
--- a/chrome/test/data/extensions/api_test/networking/test.js
+++ b/chrome/test/data/extensions/api_test/networking/test.js
@@ -15,7 +15,6 @@ var assertEq = chrome.test.assertEq;
 // Test properties for the verification API.
 var verificationProperties = {
   "certificate": "certificate",
-  "intermediateCertificates": ["ica1", "ica2", "ica3"],
   "publicKey": "cHVibGljX2tleQ==",  // Base64("public_key")
   "nonce": "nonce",
   "signedData": "c2lnbmVkX2RhdGE=",  // Base64("signed_data")
diff --git a/chrome/test/data/extensions/api_test/networking_private/test.js b/chrome/test/data/extensions/api_test/networking_private/test.js
index 336018d..0af2e86 100644
--- a/chrome/test/data/extensions/api_test/networking_private/test.js
+++ b/chrome/test/data/extensions/api_test/networking_private/test.js
@@ -14,7 +14,6 @@ var kGuid = 'SOME_GUID';
 // Test properties for the verification API.
 var verificationProperties = {
   "certificate": "certificate",
-  "intermediateCertificates": ["ica1", "ica2", "ica3"],
   "publicKey": "cHVibGljX2tleQ==",  // Base64("public_key")
   "nonce": "nonce",
   "signedData": "c2lnbmVkX2RhdGE=",  // Base64("signed_data")
diff --git a/extensions/browser/BUILD.gn b/extensions/browser/BUILD.gn
index 63eb6e0..a04436b 100644
--- a/extensions/browser/BUILD.gn
+++ b/extensions/browser/BUILD.gn
@@ -533,6 +533,12 @@ source_set("browser") {
       "//extensions/common/api/cast_channel:cast_channel_proto",
     ]
 
+    if (use_openssl) {
+      sources += [ "api/cast_channel/cast_auth_util_openssl.cc" ]
+    } else {
+      sources += [ "api/cast_channel/cast_auth_util_nss.cc" ]
+    }
+
     if (is_chromeos) {
       deps += [ "//chromeos" ]
       sources += [
diff --git a/extensions/browser/api/cast_channel/cast_auth_util.cc b/extensions/browser/api/cast_channel/cast_auth_util.cc
index e2beca1..e863a57 100644
--- a/extensions/browser/api/cast_channel/cast_auth_util.cc
+++ b/extensions/browser/api/cast_channel/cast_auth_util.cc
@@ -4,14 +4,11 @@
 
 #include "extensions/browser/api/cast_channel/cast_auth_util.h"
 
-#include <vector>
-
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "extensions/browser/api/cast_channel/cast_message_util.h"
 #include "extensions/common/api/cast_channel/cast_channel.pb.h"
-#include "extensions/common/cast/cast_cert_validator.h"
 
 namespace extensions {
 namespace core_api {
@@ -23,8 +20,6 @@ const char* const kParseErrorPrefix = "Failed to parse auth message: ";
 const unsigned char kAudioOnlyPolicy[] =
     {0x06, 0x0A, 0x2B, 0x06, 0x01, 0x04, 0x01, 0xD6, 0x79, 0x02, 0x05, 0x02};
 
-namespace cast_crypto = ::extensions::core_api::cast_crypto;
-
 // Extracts an embedded DeviceAuthMessage payload from an auth challenge reply
 // message.
 AuthResult ParseAuthMessage(const CastMessage& challenge_reply,
@@ -60,33 +55,6 @@ AuthResult ParseAuthMessage(const CastMessage& challenge_reply,
   return AuthResult();
 }
 
-AuthResult TranslateVerificationResult(
-    const cast_crypto::VerificationResult& result) {
-  AuthResult translated;
-  translated.error_message = result.error_message;
-  translated.nss_error_code = result.library_error_code;
-  switch (result.error_type) {
-    case cast_crypto::VerificationResult::ERROR_NONE:
-      translated.error_type = AuthResult::ERROR_NONE;
-      break;
-    case cast_crypto::VerificationResult::ERROR_CERT_INVALID:
-      translated.error_type = AuthResult::ERROR_CERT_PARSING_FAILED;
-      break;
-    case cast_crypto::VerificationResult::ERROR_CERT_UNTRUSTED:
-      translated.error_type = AuthResult::ERROR_CERT_NOT_SIGNED_BY_TRUSTED_CA;
-      break;
-    case cast_crypto::VerificationResult::ERROR_SIGNATURE_INVALID:
-      translated.error_type = AuthResult::ERROR_SIGNED_BLOBS_MISMATCH;
-      break;
-    case cast_crypto::VerificationResult::ERROR_INTERNAL:
-      translated.error_type = AuthResult::ERROR_UNEXPECTED_AUTH_LIBRARY_RESULT;
-      break;
-    default:
-      translated.error_type = AuthResult::ERROR_CERT_NOT_SIGNED_BY_TRUSTED_CA;
-  };
-  return translated;
-}
-
 }  // namespace
 
 AuthResult::AuthResult()
@@ -145,31 +113,6 @@ AuthResult AuthenticateChallengeReply(const CastMessage& challenge_reply,
   return result;
 }
 
-// This function does the following
-// * Verifies that the trusted CA |response.intermediate_certificate| is
-//   whitelisted for use.
-// * Verifies that |response.client_auth_certificate| is signed
-//   by the trusted CA certificate.
-// * Verifies that |response.signature| matches the signature
-//   of |peer_cert| by |response.client_auth_certificate|'s public
-//   key.
-AuthResult VerifyCredentials(const AuthResponse& response,
-                             const std::string& peer_cert) {
-  // Verify the certificate
-  scoped_ptr<cast_crypto::CertVerificationContext> verification_context;
-  cast_crypto::VerificationResult ret = cast_crypto::VerifyDeviceCert(
-      response.client_auth_certificate(),
-      std::vector<std::string>(response.intermediate_certificate().begin(),
-                               response.intermediate_certificate().end()),
-      &verification_context);
-
-  if (ret.Success())
-    ret = verification_context->VerifySignatureOverData(response.signature(),
-                                                        peer_cert);
-
-  return TranslateVerificationResult(ret);
-}
-
 }  // namespace cast_channel
 }  // namespace core_api
 }  // namespace extensions
diff --git a/extensions/browser/api/cast_channel/cast_auth_util_nss.cc b/extensions/browser/api/cast_channel/cast_auth_util_nss.cc
new file mode 100644
index 0000000..97f16d7
--- /dev/null
+++ b/extensions/browser/api/cast_channel/cast_auth_util_nss.cc
@@ -0,0 +1,142 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "extensions/browser/api/cast_channel/cast_auth_util.h"
+
+#include <cert.h>
+#include <cryptohi.h>
+#include <pk11pub.h>
+#include <seccomon.h>
+#include <string>
+
+#include "base/logging.h"
+#include "base/strings/string_piece.h"
+#include "crypto/nss_util.h"
+#include "crypto/scoped_nss_types.h"
+#include "extensions/browser/api/cast_channel/cast_auth_ica.h"
+#include "extensions/browser/api/cast_channel/cast_message_util.h"
+#include "extensions/common/api/cast_channel/cast_channel.pb.h"
+#include "net/base/hash_value.h"
+#include "net/cert/x509_certificate.h"
+
+namespace extensions {
+namespace core_api {
+namespace cast_channel {
+namespace {
+
+typedef scoped_ptr<
+    CERTCertificate,
+    crypto::NSSDestroyer<CERTCertificate, CERT_DestroyCertificate> >
+        ScopedCERTCertificate;
+
+}  // namespace
+
+// Authenticates the given credentials:
+// 1. |signature| verification of |peer_cert| using |certificate|.
+// 2. |certificate| is signed by a trusted CA.
+AuthResult VerifyCredentials(const AuthResponse& response,
+                             const std::string& peer_cert) {
+  const std::string kErrorPrefix("Failed to verify credentials: ");
+  const std::string& certificate = response.client_auth_certificate();
+  const std::string& signature = response.signature();
+
+  // If the list of intermediates is empty then use kPublicKeyICA1 as
+  // the trusted CA (legacy case).
+  // Otherwise, use the first intermediate in the list as long as it
+  // is in the allowed list of intermediates.
+  int num_intermediates = response.intermediate_certificate_size();
+
+  VLOG(1) << "Response has " << num_intermediates << " intermediates";
+
+  base::StringPiece ica;
+  if (num_intermediates <= 0) {
+    ica = GetDefaultTrustedICAPublicKey();
+  } else {
+    ica = GetTrustedICAPublicKey(response.intermediate_certificate(0));
+  }
+  if (ica.empty()) {
+    return AuthResult::CreateWithParseError(
+        "Disallowed intermediate cert",
+        AuthResult::ERROR_FINGERPRINT_NOT_FOUND);
+  }
+
+  SECItem trusted_ca_key_der;
+  trusted_ca_key_der.type = SECItemType::siDERCertBuffer;
+  trusted_ca_key_der.data =
+      const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(ica.data()));
+  trusted_ca_key_der.len = ica.size();
+
+  crypto::EnsureNSSInit();
+  SECItem der_cert;
+  der_cert.type = siDERCertBuffer;
+  // Make a copy of certificate string so it is safe to type cast.
+  der_cert.data = reinterpret_cast<unsigned char*>(const_cast<char*>(
+      certificate.data()));
+  der_cert.len = certificate.length();
+
+  // Parse into a certificate structure.
+  ScopedCERTCertificate cert(CERT_NewTempCertificate(
+      CERT_GetDefaultCertDB(), &der_cert, NULL, PR_FALSE, PR_TRUE));
+  if (!cert.get()) {
+    return AuthResult::CreateWithNSSError(
+        "Failed to parse certificate.",
+        AuthResult::ERROR_CERT_PARSING_FAILED, PORT_GetError());
+  }
+
+  // Check that the certificate is signed by trusted CA.
+  // NOTE: We const_cast trusted_ca_key_der since on some platforms
+  // SECKEY_ImportDERPublicKey API takes in SECItem* and not const
+  // SECItem*.
+  crypto::ScopedSECKEYPublicKey ca_public_key(
+      SECKEY_ImportDERPublicKey(&trusted_ca_key_der, CKK_RSA));
+  if (!ca_public_key) {
+    return AuthResult::CreateWithNSSError(
+        "Failed to import public key from CA certificate.",
+        AuthResult::ERROR_CERT_PARSING_FAILED, PORT_GetError());
+  }
+  SECStatus verified = CERT_VerifySignedDataWithPublicKey(
+      &cert->signatureWrap, ca_public_key.get(), NULL);
+  if (verified != SECSuccess) {
+    return AuthResult::CreateWithNSSError(
+        "Cert not signed by trusted CA",
+        AuthResult::ERROR_CERT_NOT_SIGNED_BY_TRUSTED_CA, PORT_GetError());
+  }
+
+  VLOG(1) << "Cert signed by trusted CA";
+
+  // Verify that the |signature| matches |peer_cert|.
+  crypto::ScopedSECKEYPublicKey public_key(CERT_ExtractPublicKey(cert.get()));
+  if (!public_key.get()) {
+    return AuthResult::CreateWithNSSError(
+        "Unable to extract public key from certificate",
+        AuthResult::ERROR_CANNOT_EXTRACT_PUBLIC_KEY, PORT_GetError());
+  }
+  SECItem signature_item;
+  signature_item.type = siBuffer;
+  signature_item.data = reinterpret_cast<unsigned char*>(
+      const_cast<char*>(signature.data()));
+  signature_item.len = signature.length();
+  verified = VFY_VerifyDataDirect(
+      reinterpret_cast<unsigned char*>(const_cast<char*>(peer_cert.data())),
+      peer_cert.size(),
+      public_key.get(),
+      &signature_item,
+      SEC_OID_PKCS1_RSA_ENCRYPTION,
+      SEC_OID_SHA1, NULL, NULL);
+
+  if (verified != SECSuccess) {
+    return AuthResult::CreateWithNSSError(
+        "Signed blobs did not match",
+        AuthResult::ERROR_SIGNED_BLOBS_MISMATCH,
+        PORT_GetError());
+  }
+
+  VLOG(1) << "Signature verification succeeded";
+
+  return AuthResult();
+}
+
+}  // namespace cast_channel
+}  // namespace core_api
+}  // namespace extensions
diff --git a/extensions/browser/api/cast_channel/cast_auth_util_openssl.cc b/extensions/browser/api/cast_channel/cast_auth_util_openssl.cc
new file mode 100644
index 0000000..b662840
--- /dev/null
+++ b/extensions/browser/api/cast_channel/cast_auth_util_openssl.cc
@@ -0,0 +1,144 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "extensions/browser/api/cast_channel/cast_auth_util.h"
+
+#include <openssl/evp.h>
+#include <openssl/rsa.h>
+#include <openssl/x509.h>
+#include <stddef.h>
+
+#include "base/logging.h"
+#include "base/strings/stringprintf.h"
+#include "crypto/openssl_util.h"
+#include "crypto/scoped_openssl_types.h"
+#include "extensions/browser/api/cast_channel/cast_auth_ica.h"
+#include "extensions/browser/api/cast_channel/cast_message_util.h"
+#include "extensions/common/api/cast_channel/cast_channel.pb.h"
+#include "net/cert/x509_certificate.h"
+#include "net/cert/x509_util_openssl.h"
+
+namespace extensions {
+namespace core_api {
+namespace cast_channel {
+namespace {
+
+typedef crypto::ScopedOpenSSL<X509, X509_free>::Type ScopedX509;
+
+}  // namespace
+
+// This function does the following
+// * Verifies that the trusted CA |response.intermediate_certificate| is
+//   whitelisted for use.
+// * Verifies that |response.client_auth_certificate| is signed
+//   by the trusted CA certificate.
+// * Verifies that |response.signature| matches the signature
+//   of |peer_cert| by |response.client_auth_certificate|'s public
+//   key.
+//
+// TODO(kmarshall): Report fine-grained errors from OpenSSL.
+AuthResult VerifyCredentials(const AuthResponse& response,
+                             const std::string& peer_cert) {
+  crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE);
+
+  // Get the public key of the ICA that was used to sign the client's cert.
+  base::StringPiece ca_public_key_bytes;
+  if (response.intermediate_certificate().size() <= 0) {
+    ca_public_key_bytes = GetDefaultTrustedICAPublicKey();
+  } else {
+    ca_public_key_bytes =
+        GetTrustedICAPublicKey(response.intermediate_certificate(0));
+    if (ca_public_key_bytes.empty()) {
+      LOG(ERROR) << "Couldn't find trusted ICA.";
+      return AuthResult::CreateWithParseError(
+          "failed to verify credentials: cert not signed by trusted CA",
+          AuthResult::ERROR_FINGERPRINT_NOT_FOUND);
+    }
+  }
+
+  // Parse the CA public key.
+  const uint8_t* ca_ptr =
+      reinterpret_cast<const uint8_t*>(ca_public_key_bytes.data());
+  const uint8_t* ca_public_key_end = ca_ptr + ca_public_key_bytes.size();
+  crypto::ScopedRSA ca_public_key_rsa(
+      d2i_RSAPublicKey(NULL, &ca_ptr, ca_public_key_bytes.size()));
+  if (!ca_public_key_rsa || ca_ptr != ca_public_key_end) {
+    LOG(ERROR) << "Failed to import trusted public key.";
+    return AuthResult::CreateWithParseError(
+        "failed to import trusted public key.",
+        AuthResult::ERROR_CERT_PARSING_FAILED);
+  }
+  crypto::ScopedEVP_PKEY ca_public_key(EVP_PKEY_new());
+  if (!ca_public_key ||
+      !EVP_PKEY_set1_RSA(ca_public_key.get(), ca_public_key_rsa.get())) {
+    LOG(ERROR) << "Failed to initialize EVP_PKEY";
+    return AuthResult::CreateWithParseError(
+        "failed to initialize EVP_PKEY.",
+        AuthResult::ERROR_CANNOT_EXTRACT_PUBLIC_KEY);
+  }
+
+  // Parse the client auth certificate.
+  const uint8_t* client_cert_ptr = reinterpret_cast<const uint8_t*>(
+      response.client_auth_certificate().data());
+  const uint8_t* client_cert_end =
+      client_cert_ptr +
+      response.client_auth_certificate().size();
+  const ScopedX509 client_cert(
+      d2i_X509(NULL, &client_cert_ptr,
+               response.client_auth_certificate().size()));
+  if (!client_cert || client_cert_ptr != client_cert_end) {
+    LOG(ERROR) << "Failed to parse certificate.";
+    return AuthResult::CreateWithParseError(
+        "failed to parse client_auth_certificate.",
+        AuthResult::ERROR_CERT_PARSING_FAILED);
+  }
+
+  // Verify that the client auth certificate was signed by a trusted CA.
+  if (X509_verify(client_cert.get(), ca_public_key.get()) <= 0) {
+    LOG(ERROR) << "Certificate is not issued by a trusted CA.";
+      return AuthResult::CreateWithParseError(
+          "cert not signed by trusted CA",
+          AuthResult::ERROR_CERT_NOT_SIGNED_BY_TRUSTED_CA);
+  }
+
+  // Get the client auth certificate's public key.
+  const crypto::ScopedEVP_PKEY client_public_key(
+      X509_get_pubkey(client_cert.get()));
+  const int client_public_key_type = EVP_PKEY_id(client_public_key.get());
+  if (client_public_key_type != EVP_PKEY_RSA) {
+    LOG(ERROR) << "Expected RSA key type for client certificate, got "
+               << client_public_key_type << " instead.";
+    return AuthResult::CreateWithParseError(
+        "couldn't extract public_key from client cert.",
+        AuthResult::ERROR_CANNOT_EXTRACT_PUBLIC_KEY);
+  }
+
+  // Check that the SSL peer certificate was signed using the client's public
+  // key.
+  const crypto::ScopedEVP_MD_CTX ctx(EVP_MD_CTX_create());
+  if (!ctx ||
+      !EVP_DigestVerifyInit(ctx.get(), NULL, EVP_sha1(), NULL,
+                            client_public_key.get()) ||
+      !EVP_DigestVerifyUpdate(ctx.get(), peer_cert.data(), peer_cert.size())) {
+    return AuthResult::CreateWithParseError(
+        "error initializing payload verification operation.",
+        AuthResult::ERROR_UNEXPECTED_AUTH_LIBRARY_RESULT);
+  }
+  const std::string& signature = response.signature();
+  if (EVP_DigestVerifyFinal(
+          ctx.get(),
+          reinterpret_cast<uint8_t*>(const_cast<char*>(signature.data())),
+          signature.size()) <= 0) {
+    return AuthResult::CreateWithParseError(
+        "payload verification failed.",
+        AuthResult::ERROR_SIGNED_BLOBS_MISMATCH);
+  }
+
+  return AuthResult();
+}
+
+}  // namespace cast_channel
+}  // namespace core_api
+}  // namespace extensions
+
diff --git a/extensions/browser/api/cast_channel/cast_auth_util_unittest.cc b/extensions/browser/api/cast_channel/cast_auth_util_unittest.cc
index 6d56f683..0e3bcd3 100644
--- a/extensions/browser/api/cast_channel/cast_auth_util_unittest.cc
+++ b/extensions/browser/api/cast_channel/cast_auth_util_unittest.cc
@@ -354,7 +354,8 @@ TEST_F(CastAuthUtilTest, VerifyBadCA) {
   AuthResult result = VerifyCredentials(
       auth_response, CreatePeerCert());
   EXPECT_FALSE(result.success());
-  EXPECT_EQ(AuthResult::ERROR_CERT_NOT_SIGNED_BY_TRUSTED_CA, result.error_type);
+  EXPECT_EQ(AuthResult::ERROR_FINGERPRINT_NOT_FOUND,
+            result.error_type);
 }
 
 TEST_F(CastAuthUtilTest, VerifyBadClientAuthCert) {
diff --git a/extensions/common/BUILD.gn b/extensions/common/BUILD.gn
index 76e932d..f6dcd00 100644
--- a/extensions/common/BUILD.gn
+++ b/extensions/common/BUILD.gn
@@ -2,7 +2,6 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//third_party/mojo/src/mojo/public/tools/bindings/mojom.gni")
 
@@ -42,8 +41,6 @@ if (enable_extensions) {
       "api/sockets/sockets_manifest_handler.h",
       "api/sockets/sockets_manifest_permission.cc",
       "api/sockets/sockets_manifest_permission.h",
-      "cast/cast_cert_validator.cc",
-      "cast/cast_cert_validator.h",
       "common_manifest_handlers.cc",
       "common_manifest_handlers.h",
       "csp_validator.cc",
@@ -252,12 +249,6 @@ if (enable_extensions) {
       "//url",
     ]
 
-    if (use_openssl) {
-      sources += [ "cast/cast_cert_validator_openssl.cc" ]
-    } else {
-      sources += [ "cast/cast_cert_validator_nss.cc" ]
-    }
-
     if (enable_nacl) {
       sources += [
         "manifest_handlers/nacl_modules_handler.cc",
diff --git a/extensions/common/cast/cast_cert_validator.cc b/extensions/common/cast/cast_cert_validator.cc
deleted file mode 100644
index e4f0440..0000000
--- a/extensions/common/cast/cast_cert_validator.cc
+++ /dev/null
@@ -1,30 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "extensions/common/cast/cast_cert_validator.h"
-
-namespace extensions {
-namespace core_api {
-namespace cast_crypto {
-
-VerificationResult::VerificationResult()
-    : VerificationResult("", ERROR_NONE, 0) {
-}
-
-VerificationResult::VerificationResult(const std::string& in_error_message,
-                                       ErrorType in_error_type)
-    : VerificationResult(in_error_message, in_error_type, 0) {
-}
-
-VerificationResult::VerificationResult(const std::string& in_error_message,
-                                       ErrorType in_error_type,
-                                       int in_error_code)
-    : error_type(in_error_type),
-      error_message(in_error_message),
-      library_error_code(in_error_code) {
-}
-
-}  // namespace cast_crypto
-}  // namespace core_api
-}  // namespace extensions
diff --git a/extensions/common/cast/cast_cert_validator.h b/extensions/common/cast/cast_cert_validator.h
deleted file mode 100644
index b9d2cf6..0000000
--- a/extensions/common/cast/cast_cert_validator.h
+++ /dev/null
@@ -1,96 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef EXTENSIONS_COMMON_CAST_CAST_CERT_VALIDATOR_H_
-#define EXTENSIONS_COMMON_CAST_CAST_CERT_VALIDATOR_H_
-
-#include <string>
-#include <vector>
-
-#include "base/memory/scoped_ptr.h"
-#include "base/strings/string_piece.h"
-
-namespace extensions {
-namespace core_api {
-namespace cast_crypto {
-
-// Status of a certificate or certificate verification operation.
-struct VerificationResult {
-  // Mapped to extensions::core_api::cast_channel::AuthResult::ErrorType in
-  // cast_auto_util.cc. Update the mapping code when modifying this enum.
-  enum ErrorType {
-    // Verification has succeeded.
-    ERROR_NONE = 0,
-    // There was a problem with the certificate, such as invalid or corrupt
-    // certificate data or invalid issuing certificate signature.
-    ERROR_CERT_INVALID,
-    // Certificate may be valid, but not trusted in this context.
-    ERROR_CERT_UNTRUSTED,
-    // Signature verification failed
-    ERROR_SIGNATURE_INVALID,
-    // Catch-all for internal errors that are not covered by the other error
-    // types.
-    ERROR_INTERNAL
-  };
-
-  // Constructs a VerificationResult that corresponds to success.
-  VerificationResult();
-
-  // Construct error-related objects
-  VerificationResult(const std::string& error_message, ErrorType error_type);
-  VerificationResult(const std::string& error_message,
-                     ErrorType error_type,
-                     int error_code);
-
-  bool Success() const { return error_type == ERROR_NONE; }
-  bool Failure() const { return error_type != ERROR_NONE; }
-
-  // Generates a string representation of this object for logging.
-  std::string GetLogString() const;
-
-  ErrorType error_type;
-  // Human-readable description of the problem if error_type != ERROR_NONE
-  std::string error_message;
-  // May contain the underlying crypto library error code.
-  int library_error_code;
-};
-
-// An object of this type is returned by the VerifyCert function, and can be
-// used for additional certificate-related operations, using the verified
-// certificate.
-class CertVerificationContext {
- public:
-  CertVerificationContext() {}
-  virtual ~CertVerificationContext() {}
-
-  // Use the public key from the verified certificate to verify a
-  // sha1WithRSAEncryption |signature| over arbitrary |data|. Both |signature|
-  // and |data| hold raw binary data.
-  virtual VerificationResult VerifySignatureOverData(
-      const base::StringPiece& signature,
-      const base::StringPiece& data) const = 0;
-
-  // Retrieve the Common Name attribute of the subject's distinguished name from
-  // the verified certificate, if present.  Returns an empty string if no Common
-  // Name is found.
-  virtual std::string GetCommonName() const = 0;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(CertVerificationContext);
-};
-
-// Verify a cast device certificate, using optional intermediate certificate
-// authority certificates. |context| will be populated with an instance of
-// CertVerificationContext, which allows to perform additional verification
-// steps as required.
-VerificationResult VerifyDeviceCert(
-    const base::StringPiece& device_cert,
-    const std::vector<std::string>& ica_certs,
-    scoped_ptr<CertVerificationContext>* context);
-
-}  // namespace cast_crypto
-}  // namespace core_api
-}  // namespace extensions
-
-#endif  // EXTENSIONS_COMMON_CAST_CAST_CERT_VALIDATOR_H_
diff --git a/extensions/common/cast/cast_cert_validator_nss.cc b/extensions/common/cast/cast_cert_validator_nss.cc
deleted file mode 100644
index 425da28..0000000
--- a/extensions/common/cast/cast_cert_validator_nss.cc
+++ /dev/null
@@ -1,155 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "extensions/common/cast/cast_cert_validator.h"
-
-#include <cert.h>
-#include <cryptohi.h>
-#include <pk11pub.h>
-#include <seccomon.h>
-
-#include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/strings/string_number_conversions.h"
-#include "crypto/nss_util.h"
-#include "crypto/scoped_nss_types.h"
-#include "extensions/browser/api/cast_channel/cast_auth_ica.h"
-
-namespace extensions {
-namespace core_api {
-namespace cast_crypto {
-
-namespace {
-
-typedef scoped_ptr<
-    CERTCertificate,
-    crypto::NSSDestroyer<CERTCertificate, CERT_DestroyCertificate>>
-    ScopedCERTCertificate;
-
-class CertVerificationContextNSS : public CertVerificationContext {
- public:
-  explicit CertVerificationContextNSS(CERTCertificate* certificate)
-      : certificate_(certificate) {}
-
-  VerificationResult VerifySignatureOverData(
-      const base::StringPiece& signature,
-      const base::StringPiece& data) const override {
-    // Retrieve public key object
-    crypto::ScopedSECKEYPublicKey public_key_obj(
-        CERT_ExtractPublicKey(certificate_.get()));
-    if (!public_key_obj.get()) {
-      return VerificationResult(
-          "Failed to extract device certificate public key.",
-          VerificationResult::ERROR_CERT_INVALID);
-    }
-    // Verify signature.
-    SECItem signature_item;
-    signature_item.type = siBuffer;
-    signature_item.data =
-        reinterpret_cast<unsigned char*>(const_cast<char*>(signature.data()));
-    signature_item.len = signature.length();
-    if (VFY_VerifyDataDirect(
-            reinterpret_cast<unsigned char*>(const_cast<char*>(data.data())),
-            data.size(), public_key_obj.get(), &signature_item,
-            SEC_OID_PKCS1_RSA_ENCRYPTION, SEC_OID_SHA1, NULL,
-            NULL) != SECSuccess) {
-      return VerificationResult("Signature verification failed.",
-                                VerificationResult::ERROR_SIGNATURE_INVALID,
-                                PORT_GetError());
-    }
-    return VerificationResult();
-  }
-
-  std::string GetCommonName() const override {
-    char* common_name = CERT_GetCommonName(&certificate_->subject);
-    if (!common_name)
-      return std::string();
-
-    std::string result(common_name);
-    PORT_Free(common_name);
-    return result;
-  }
-
- private:
-  ScopedCERTCertificate certificate_;
-};
-
-}  // namespace
-
-VerificationResult VerifyDeviceCert(
-    const base::StringPiece& device_cert,
-    const std::vector<std::string>& ica_certs,
-    scoped_ptr<CertVerificationContext>* context) {
-  crypto::EnsureNSSInit();
-
-  // If the list of intermediates is empty then use kPublicKeyICA1 as
-  // the trusted CA (legacy case).
-  // Otherwise, use the first intermediate in the list as long as it
-  // is in the allowed list of intermediates.
-  base::StringPiece ica_public_key_der =
-      (ica_certs.size() == 0)
-          ? cast_channel::GetDefaultTrustedICAPublicKey()
-          : cast_channel::GetTrustedICAPublicKey(ica_certs[0]);
-
-  if (ica_public_key_der.empty()) {
-    return VerificationResult(
-        "Device certificate is not signed by a trusted CA",
-        VerificationResult::ERROR_CERT_UNTRUSTED);
-  }
-  // Initialize the ICA public key.
-  SECItem ica_public_key_der_item;
-  ica_public_key_der_item.type = SECItemType::siDERCertBuffer;
-  ica_public_key_der_item.data = const_cast<uint8_t*>(
-      reinterpret_cast<const uint8_t*>(ica_public_key_der.data()));
-  ica_public_key_der_item.len = ica_public_key_der.size();
-
-  crypto::ScopedSECKEYPublicKey ica_public_key_obj(
-      SECKEY_ImportDERPublicKey(&ica_public_key_der_item, CKK_RSA));
-  if (!ica_public_key_obj) {
-    return VerificationResult("Failed to import trusted public key.",
-                              VerificationResult::ERROR_INTERNAL,
-                              PORT_GetError());
-  }
-  SECItem device_cert_der_item;
-  device_cert_der_item.type = siDERCertBuffer;
-  // Make a copy of certificate string so it is safe to type cast.
-  device_cert_der_item.data =
-      reinterpret_cast<unsigned char*>(const_cast<char*>(device_cert.data()));
-  device_cert_der_item.len = device_cert.length();
-
-  // Parse into a certificate structure.
-  ScopedCERTCertificate device_cert_obj(CERT_NewTempCertificate(
-      CERT_GetDefaultCertDB(), &device_cert_der_item, NULL, PR_FALSE, PR_TRUE));
-  if (!device_cert_obj.get()) {
-    return VerificationResult("Failed to parse device certificate.",
-                              VerificationResult::ERROR_CERT_INVALID,
-                              PORT_GetError());
-  }
-  if (CERT_VerifySignedDataWithPublicKey(&device_cert_obj->signatureWrap,
-                                         ica_public_key_obj.get(),
-                                         NULL) != SECSuccess) {
-    return VerificationResult("Signature verification failed.",
-                              VerificationResult::ERROR_SIGNATURE_INVALID,
-                              PORT_GetError());
-  }
-  if (context) {
-    scoped_ptr<CertVerificationContext> tmp_context(
-        new CertVerificationContextNSS(device_cert_obj.release()));
-    tmp_context.swap(*context);
-  }
-
-  return VerificationResult();
-}
-
-std::string VerificationResult::GetLogString() const {
-  std::string nssError = "NSS Error Code: ";
-  nssError += base::IntToString(library_error_code);
-  return error_message.size()
-             ? std::string("Error: ") + error_message + ", " + nssError
-             : nssError;
-}
-
-}  // namespace cast_crypto
-}  // namespace core_api
-}  // namespace extensions
diff --git a/extensions/common/cast/cast_cert_validator_openssl.cc b/extensions/common/cast/cast_cert_validator_openssl.cc
deleted file mode 100644
index 8c2e4c0..0000000
--- a/extensions/common/cast/cast_cert_validator_openssl.cc
+++ /dev/null
@@ -1,158 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "extensions/common/cast/cast_cert_validator.h"
-
-#include <openssl/digest.h>
-#include <openssl/evp.h>
-#include <openssl/rsa.h>
-#include <openssl/x509.h>
-
-#include "base/logging.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/string_util.h"
-#include "base/strings/stringprintf.h"
-#include "crypto/openssl_util.h"
-#include "crypto/scoped_openssl_types.h"
-#include "extensions/browser/api/cast_channel/cast_auth_ica.h"
-#include "net/cert/x509_certificate.h"
-#include "net/cert/x509_util_openssl.h"
-
-namespace extensions {
-namespace core_api {
-namespace cast_crypto {
-namespace {
-
-typedef crypto::ScopedOpenSSL<X509, X509_free>::Type ScopedX509;
-
-class CertVerificationContextOpenSSL : public CertVerificationContext {
- public:
-  // Takes ownership of the passed-in x509 object
-  explicit CertVerificationContextOpenSSL(X509* x509) : x509_(x509) {}
-
-  VerificationResult VerifySignatureOverData(
-      const base::StringPiece& signature,
-      const base::StringPiece& data) const override {
-    // Retrieve public key object.
-    crypto::ScopedEVP_PKEY public_key(X509_get_pubkey(x509_.get()));
-    if (!public_key) {
-      return VerificationResult(
-          "Failed to extract device certificate public key.",
-          VerificationResult::ERROR_CERT_INVALID);
-    }
-    // Make sure the key is RSA.
-    const int public_key_type = EVP_PKEY_id(public_key.get());
-    if (public_key_type != EVP_PKEY_RSA) {
-      return VerificationResult(
-          std::string("Expected RSA key type for client certificate, got ") +
-              base::IntToString(public_key_type) + " instead.",
-          VerificationResult::ERROR_CERT_INVALID);
-    }
-    // Verify signature.
-    const crypto::ScopedEVP_MD_CTX ctx(EVP_MD_CTX_create());
-    if (!ctx ||
-        !EVP_DigestVerifyInit(ctx.get(), NULL, EVP_sha1(), NULL,
-                              public_key.get()) ||
-        !EVP_DigestVerifyUpdate(ctx.get(), data.data(), data.size()) ||
-        !EVP_DigestVerifyFinal(
-            ctx.get(), reinterpret_cast<const uint8_t*>(signature.data()),
-            signature.size())) {
-      return VerificationResult("Signature verification failed.",
-                                VerificationResult::ERROR_SIGNATURE_INVALID);
-    }
-    return VerificationResult();
-  }
-
-  std::string GetCommonName() const override {
-    int common_name_length = X509_NAME_get_text_by_NID(
-        x509_->cert_info->subject, NID_commonName, NULL, 0);
-    if (common_name_length < 0)
-      return std::string();
-    std::string common_name;
-    common_name_length = X509_NAME_get_text_by_NID(
-        x509_->cert_info->subject, NID_commonName,
-        WriteInto(&common_name, static_cast<size_t>(common_name_length) + 1),
-        common_name_length + 1);
-    if (common_name_length < 0)
-      return std::string();
-    return common_name;
-  }
-
- private:
-  ScopedX509 x509_;
-};
-
-}  // namespace
-
-VerificationResult VerifyDeviceCert(
-    const base::StringPiece& device_cert,
-    const std::vector<std::string>& ica_certs,
-    scoped_ptr<CertVerificationContext>* context) {
-  crypto::EnsureOpenSSLInit();
-  crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE);
-
-  // If the list of intermediates is empty then use kPublicKeyICA1 as
-  // the trusted CA (legacy case).
-  // Otherwise, use the first intermediate in the list as long as it
-  // is in the allowed list of intermediates.
-  base::StringPiece ica_public_key_der =
-      (ica_certs.size() == 0)
-          ? cast_channel::GetDefaultTrustedICAPublicKey()
-          : cast_channel::GetTrustedICAPublicKey(ica_certs[0]);
-
-  if (ica_public_key_der.empty()) {
-    return VerificationResult(
-        "Device certificate is not signed by a trusted CA",
-        VerificationResult::ERROR_CERT_UNTRUSTED);
-  }
-  // Initialize the ICA public key.
-  const uint8_t* ica_public_key_der_ptr =
-      reinterpret_cast<const uint8_t*>(ica_public_key_der.data());
-  const uint8_t* ica_public_key_der_end =
-      ica_public_key_der_ptr + ica_public_key_der.size();
-  crypto::ScopedRSA ica_public_key_rsa(d2i_RSAPublicKey(
-      NULL, &ica_public_key_der_ptr, ica_public_key_der.size()));
-  if (!ica_public_key_rsa || ica_public_key_der_ptr != ica_public_key_der_end) {
-    return VerificationResult("Failed to import trusted public key.",
-                              VerificationResult::ERROR_INTERNAL);
-  }
-  crypto::ScopedEVP_PKEY ica_public_key_evp(EVP_PKEY_new());
-  if (!ica_public_key_evp ||
-      !EVP_PKEY_set1_RSA(ica_public_key_evp.get(), ica_public_key_rsa.get())) {
-    return VerificationResult("Failed to import trusted public key.",
-                              VerificationResult::ERROR_INTERNAL);
-  }
-  // Parse the device certificate.
-  const uint8_t* device_cert_der_ptr =
-      reinterpret_cast<const uint8_t*>(device_cert.data());
-  const uint8_t* device_cert_der_end = device_cert_der_ptr + device_cert.size();
-  ScopedX509 device_cert_x509(
-      d2i_X509(NULL, &device_cert_der_ptr, device_cert.size()));
-  if (!device_cert_x509 || device_cert_der_ptr != device_cert_der_end) {
-    return VerificationResult("Failed to parse device certificate.",
-                              VerificationResult::ERROR_CERT_INVALID);
-  }
-  // Verify device certificate.
-  if (X509_verify(device_cert_x509.get(), ica_public_key_evp.get()) != 1) {
-    return VerificationResult(
-        "Device certificate signature verification failed.",
-        VerificationResult::ERROR_CERT_INVALID);
-  }
-
-  if (context) {
-    scoped_ptr<CertVerificationContext> tmp_context(
-        new CertVerificationContextOpenSSL(device_cert_x509.release()));
-    tmp_context.swap(*context);
-  }
-
-  return VerificationResult();
-}
-
-std::string VerificationResult::GetLogString() const {
-  return error_message;
-}
-
-}  // namespace cast_crypto
-}  // namespace core_api
-}  // namespace extensions
diff --git a/extensions/extensions.gyp b/extensions/extensions.gyp
index 1015f9f..1d3a8c9 100644
--- a/extensions/extensions.gyp
+++ b/extensions/extensions.gyp
@@ -84,8 +84,6 @@
         'common/api/sockets/sockets_manifest_handler.h',
         'common/api/sockets/sockets_manifest_permission.cc',
         'common/api/sockets/sockets_manifest_permission.h',
-        'common/cast/cast_cert_validator.cc',
-        'common/cast/cast_cert_validator.h',
         'common/common_manifest_handlers.cc',
         'common/common_manifest_handlers.h',
         'common/csp_validator.cc',
@@ -283,31 +281,6 @@
             'common/manifest_handlers/nacl_modules_handler.h',
           ],
         }],
-        ['use_openssl==1', {
-          'sources': [
-            'common/cast/cast_cert_validator_openssl.cc',
-          ],
-          'dependencies': [
-            '../third_party/boringssl/boringssl.gyp:boringssl',
-          ],
-        }, {
-          'sources': [
-            'common/cast/cast_cert_validator_nss.cc',
-          ],
-          'conditions': [
-            ['os_posix == 1 and OS != "mac" and OS != "ios" and OS != "android"', {
-              'dependencies': [
-                '../build/linux/system.gyp:ssl',
-              ],
-            }],
-            ['OS == "mac" or OS == "ios" or OS == "win"', {
-              'dependencies': [
-                '../third_party/nss/nss.gyp:nspr',
-                '../third_party/nss/nss.gyp:nss',
-              ],
-            }],
-          ],
-        }],
       ],
     },
     {
@@ -859,6 +832,32 @@
             'browser/api/vpn_provider/vpn_service_factory.h'
           ]
         }],
+        ['use_openssl==1', {
+          'sources': [
+            'browser/api/cast_channel/cast_auth_util_openssl.cc',
+          ],
+          'dependencies': [
+            '../third_party/boringssl/boringssl.gyp:boringssl',
+          ],
+        }, {
+          'sources': [
+            # cast_auth_util_nss.cc uses NSS functions.
+            'browser/api/cast_channel/cast_auth_util_nss.cc',
+          ],
+          'conditions': [
+            ['os_posix == 1 and OS != "mac" and OS != "ios" and OS != "android"', {
+              'dependencies': [
+                '../build/linux/system.gyp:ssl',
+              ],
+            }],
+            ['OS == "mac" or OS == "ios" or OS == "win"', {
+              'dependencies': [
+                '../third_party/nss/nss.gyp:nspr',
+                '../third_party/nss/nss.gyp:nss',
+              ],
+            }],
+          ],
+        }],
         ['OS != "linux"', {
           'sources': [
             'browser/api/audio/audio_service.cc',