Add TLS-SRP (RFC 5054) support

net/base/auth.h

 // Copyright (c) 2010 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 NET_BASE_AUTH_H__
 #define NET_BASE_AUTH_H__
 #pragma once
 
 #include <string>
 
 #include "base/ref_counted.h"
 #include "base/string16.h"
 
 namespace net {
 
+extern const char kTLSSRPScheme[];
+
+// Protocols that use authentication
+enum AuthOverProtocol {
+  AUTH_OVER_HTTP,
+  AUTH_OVER_TLS
+};
+
 // Holds info about an authentication challenge that we may want to display
 // to the user.
 class AuthChallengeInfo :
     public base::RefCountedThreadSafe<AuthChallengeInfo> {
  public:
   AuthChallengeInfo();
 
+  void Reset();
+
   bool operator==(const AuthChallengeInfo& that) const;
 
   bool operator!=(const AuthChallengeInfo& that) const {
     return !(*this == that);
   }
 
   bool is_proxy;  // true for Proxy-Authenticate, false for WWW-Authenticate.
   std::wstring host_and_port;  // <host>:<port> of the server asking for auth
                                // (could be the proxy).
   std::wstring scheme;  // "Basic", "Digest", or whatever other method is used.
   std::wstring realm;  // the realm provided by the server, if there is one.
 
+  int over_protocol; // the protocol to authenticate over (HTTP or TLS).
+
  private:
   friend class base::RefCountedThreadSafe<AuthChallengeInfo>;
   ~AuthChallengeInfo();
 };
 
 // Authentication structures
 enum AuthState {
   AUTH_STATE_DONT_NEED_AUTH,
   AUTH_STATE_NEED_AUTH,
   AUTH_STATE_HAVE_AUTH,
   AUTH_STATE_CANCELED
 };
 
 class AuthData : public base::RefCountedThreadSafe<AuthData> {
  public:
   AuthState state;  // whether we need, have, or gave up on authentication.
   std::wstring scheme;  // the authentication scheme.
   string16 username;  // the username supplied to us for auth.
   string16 password;  // the password supplied to us for auth.
+  int over_protocol; // the protocol to authenticate over (HTTP or TLS).
 
   // We wouldn't instantiate this class if we didn't need authentication.
   AuthData();
 
  private:
   friend class base::RefCountedThreadSafe<AuthData>;
   ~AuthData();
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_AUTH_H__