Revert of [cast_channel] Move cast_channel related files from //extensions to //components

extensions/browser/api/cast_channel/cast_auth_util.h

Index: extensions/browser/api/cast_channel/cast_auth_util.h
diff --git a/extensions/browser/api/cast_channel/cast_auth_util.h b/extensions/browser/api/cast_channel/cast_auth_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..d578c569ac69d3233fd5e6112dbc25c0c1c90233
--- /dev/null
+++ b/extensions/browser/api/cast_channel/cast_auth_util.h
@@ -0,0 +1,126 @@
+// 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_BROWSER_API_CAST_CHANNEL_CAST_AUTH_UTIL_H_
+#define EXTENSIONS_BROWSER_API_CAST_CHANNEL_CAST_AUTH_UTIL_H_
+
+#include <string>
+
+#include "base/memory/ref_counted.h"
+#include "base/time/time.h"
+
+namespace cast_certificate {
+enum class CRLPolicy;
+}
+
+namespace net {
+class X509Certificate;
+class TrustStore;
+}  // namespace net
+
+namespace extensions {
+namespace api {
+namespace cast_channel {
+
+class AuthResponse;
+class CastMessage;
+
+struct AuthResult {
+ public:
+  enum ErrorType {
+    ERROR_NONE,
+    ERROR_PEER_CERT_EMPTY,
+    ERROR_WRONG_PAYLOAD_TYPE,
+    ERROR_NO_PAYLOAD,
+    ERROR_PAYLOAD_PARSING_FAILED,
+    ERROR_MESSAGE_ERROR,
+    ERROR_NO_RESPONSE,
+    ERROR_FINGERPRINT_NOT_FOUND,
+    ERROR_CERT_PARSING_FAILED,
+    ERROR_CERT_NOT_SIGNED_BY_TRUSTED_CA,
+    ERROR_CANNOT_EXTRACT_PUBLIC_KEY,
+    ERROR_SIGNED_BLOBS_MISMATCH,
+    ERROR_TLS_CERT_VALIDITY_PERIOD_TOO_LONG,
+    ERROR_TLS_CERT_VALID_START_DATE_IN_FUTURE,
+    ERROR_TLS_CERT_EXPIRED,
+    ERROR_CRL_INVALID,
+    ERROR_CERT_REVOKED,
+    ERROR_SENDER_NONCE_MISMATCH,
+  };
+
+  enum PolicyType { POLICY_NONE = 0, POLICY_AUDIO_ONLY = 1 << 0 };
+
+  // Constructs a AuthResult that corresponds to success.
+  AuthResult();
+
+  AuthResult(const std::string& error_message, ErrorType error_type);
+
+  ~AuthResult();
+
+  static AuthResult CreateWithParseError(const std::string& error_message,
+                                         ErrorType error_type);
+
+  bool success() const { return error_type == ERROR_NONE; }
+
+  std::string error_message;
+  ErrorType error_type;
+  unsigned int channel_policies;
+};
+
+class AuthContext {
+ public:
+  ~AuthContext();
+
+  // Get an auth challenge context.
+  // The same context must be used in the challenge and reply.
+  static AuthContext Create();
+
+  // Verifies the nonce received in the response is equivalent to the one sent.
+  // Returns success if |nonce_response| matches nonce_
+  AuthResult VerifySenderNonce(const std::string& nonce_response) const;
+
+  // The nonce challenge.
+  const std::string& nonce() const { return nonce_; }
+
+ private:
+  explicit AuthContext(const std::string& nonce);
+
+  const std::string nonce_;
+};
+
+// Authenticates the given |challenge_reply|:
+// 1. Signature contained in the reply is valid.
+// 2. Certficate used to sign is rooted to a trusted CA.
+AuthResult AuthenticateChallengeReply(const CastMessage& challenge_reply,
+                                      const net::X509Certificate& peer_cert,
+                                      const AuthContext& auth_context);
+
+// Performs a quick check of the TLS certificate for time validity requirements.
+AuthResult VerifyTLSCertificate(const net::X509Certificate& peer_cert,
+                                std::string* peer_cert_der,
+                                const base::Time& verification_time);
+
+// Auth-library specific implementation of cryptographic signature
+// verification routines. Verifies that |response| contains a
+// valid signature of |signature_input|.
+AuthResult VerifyCredentials(const AuthResponse& response,
+                             const std::string& signature_input);
+
+// Exposed for testing only.
+//
+// Overloaded version of VerifyCredentials that allows modifying
+// the crl policy, trust stores, and verification times.
+AuthResult VerifyCredentialsForTest(
+    const AuthResponse& response,
+    const std::string& signature_input,
+    const cast_certificate::CRLPolicy& crl_policy,
+    net::TrustStore* cast_trust_store,
+    net::TrustStore* crl_trust_store,
+    const base::Time& verification_time);
+
+}  // namespace cast_channel
+}  // namespace api
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_API_CAST_CHANNEL_CAST_AUTH_UTIL_H_