Adds a modified copy of talk/base to webrtc/base. It is the first step in migrating talk/base to webrtc/base.

BUG=N/A
R=andrew@webrtc.org, wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/12199004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6107 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/base/openssladapter.h

@@ -0,0 +1,88 @@
+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_BASE_OPENSSLADAPTER_H__
+#define WEBRTC_BASE_OPENSSLADAPTER_H__
+
+#include <string>
+#include "webrtc/base/ssladapter.h"
+
+typedef struct ssl_st SSL;
+typedef struct ssl_ctx_st SSL_CTX;
+typedef struct x509_store_ctx_st X509_STORE_CTX;
+
+namespace rtc {
+
+///////////////////////////////////////////////////////////////////////////////
+
+class OpenSSLAdapter : public SSLAdapter {
+public:
+  static bool InitializeSSL(VerificationCallback callback);
+  static bool InitializeSSLThread();
+  static bool CleanupSSL();
+
+  OpenSSLAdapter(AsyncSocket* socket);
+  virtual ~OpenSSLAdapter();
+
+  virtual int StartSSL(const char* hostname, bool restartable);
+  virtual int Send(const void* pv, size_t cb);
+  virtual int Recv(void* pv, size_t cb);
+  virtual int Close();
+
+  // Note that the socket returns ST_CONNECTING while SSL is being negotiated.
+  virtual ConnState GetState() const;
+
+protected:
+  virtual void OnConnectEvent(AsyncSocket* socket);
+  virtual void OnReadEvent(AsyncSocket* socket);
+  virtual void OnWriteEvent(AsyncSocket* socket);
+  virtual void OnCloseEvent(AsyncSocket* socket, int err);
+
+private:
+  enum SSLState {
+    SSL_NONE, SSL_WAIT, SSL_CONNECTING, SSL_CONNECTED, SSL_ERROR
+  };
+
+  int BeginSSL();
+  int ContinueSSL();
+  void Error(const char* context, int err, bool signal = true);
+  void Cleanup();
+
+  static bool VerifyServerName(SSL* ssl, const char* host,
+                               bool ignore_bad_cert);
+  bool SSLPostConnectionCheck(SSL* ssl, const char* host);
+#if _DEBUG
+  static void SSLInfoCallback(const SSL* s, int where, int ret);
+#endif  // !_DEBUG
+  static int SSLVerifyCallback(int ok, X509_STORE_CTX* store);
+  static VerificationCallback custom_verify_callback_;
+  friend class OpenSSLStreamAdapter;  // for custom_verify_callback_;
+
+  static bool ConfigureTrustedRootCertificates(SSL_CTX* ctx);
+  static SSL_CTX* SetupSSLContext();
+
+  SSLState state_;
+  bool ssl_read_needs_write_;
+  bool ssl_write_needs_read_;
+  // If true, socket will retain SSL configuration after Close.
+  bool restartable_;
+
+  SSL* ssl_;
+  SSL_CTX* ssl_ctx_;
+  std::string ssl_host_name_;
+
+  bool custom_verification_succeeded_;
+};
+
+/////////////////////////////////////////////////////////////////////////////
+
+} // namespace rtc
+
+#endif // WEBRTC_BASE_OPENSSLADAPTER_H__