Add TLS-SRP (RFC 5054) support

net/base/tls_client_login_cache.h

Index: net/base/tls_client_login_cache.h
diff --git a/net/base/tls_client_login_cache.h b/net/base/tls_client_login_cache.h
new file mode 100644
index 0000000000000000000000000000000000000000..35491954d7073a045cc1ff249d775acfded26523
--- /dev/null
+++ b/net/base/tls_client_login_cache.h
@@ -0,0 +1,54 @@
+// Copyright (c) 2011 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_TLS_CLIENT_LOGIN_CACHE_H_
+#define NET_BASE_TLS_CLIENT_LOGIN_CACHE_H_
+#pragma once
+
+#include <string>
+#include <map>
+
+#include "base/ref_counted.h"
+#include "net/base/auth.h"
+
+namespace net {
+
+// The TLSClientLoginCache class is a simple cache structure to store TLS
+// client login credentials. Provides lookup, insertion, and deletion of
+// entries. The parameter for doing lookups, insertions, and deletions is
+// the server's host and port.
+//
+// TODO(wtc): This class is based on FtpAuthCache.  We can extract the common
+// code to a template class.
+class TLSClientLoginCache {
+ public:
+  TLSClientLoginCache();
+  ~TLSClientLoginCache();
+
+  // Checks for cached login credentials for TLS server at |server|.
+  // Returns true if a preference is found, and sets |*tls_auth_data|
+  // to the desired client login credentials.
+  // If cached login credentials are not found, returns false.
+  bool Lookup(const std::string& server,
+              scoped_refptr<AuthData>* tls_auth_data);
+
+  // Add client login credentials for |server| to the cache. If there are
+  // already login credentials for |server|, they will be overwritten.
+  void Add(const std::string& server, AuthData* tls_auth_data);
+
+  // Remove the client certificate for |server| from the cache, if one exists.
+  void Remove(const std::string& server);
+
+ private:
+  typedef std::string AuthCacheKey;
+  typedef scoped_refptr<AuthData> AuthCacheValue;
+  typedef std::map<AuthCacheKey, AuthCacheValue> AuthCacheMap;
+
+  // internal representation of cache, an STL map.
+  AuthCacheMap cache_;
+};
+
+}  // namespace net
+
+#endif  // NET_BASE_TLS_CLIENT_LOGIN_CACHE_H_