1 /* 2 * libjingle 3 * Copyright 2004--2005, Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef TALK_BASE_OPENSSLADAPTER_H__ 29 #define TALK_BASE_OPENSSLADAPTER_H__ 30 31 #include <string> 32 #include "talk/base/ssladapter.h" 33 34 typedef struct ssl_st SSL; 35 typedef struct ssl_ctx_st SSL_CTX; 36 typedef struct x509_store_ctx_st X509_STORE_CTX; 37 38 namespace talk_base { 39 40 /////////////////////////////////////////////////////////////////////////////// 41 42 class OpenSSLAdapter : public SSLAdapter { 43 public: 44 static bool InitializeSSL(VerificationCallback callback); 45 static bool InitializeSSLThread(); 46 static bool CleanupSSL(); 47 48 OpenSSLAdapter(AsyncSocket* socket); 49 virtual ~OpenSSLAdapter(); 50 51 virtual int StartSSL(const char* hostname, bool restartable); 52 virtual int Send(const void* pv, size_t cb); 53 virtual int Recv(void* pv, size_t cb); 54 virtual int Close(); 55 56 // Note that the socket returns ST_CONNECTING while SSL is being negotiated. 57 virtual ConnState GetState() const; 58 59 protected: 60 virtual void OnConnectEvent(AsyncSocket* socket); 61 virtual void OnReadEvent(AsyncSocket* socket); 62 virtual void OnWriteEvent(AsyncSocket* socket); 63 virtual void OnCloseEvent(AsyncSocket* socket, int err); 64 65 private: 66 enum SSLState { 67 SSL_NONE, SSL_WAIT, SSL_CONNECTING, SSL_CONNECTED, SSL_ERROR 68 }; 69 70 int BeginSSL(); 71 int ContinueSSL(); 72 void Error(const char* context, int err, bool signal = true); 73 void Cleanup(); 74 75 static bool VerifyServerName(SSL* ssl, const char* host, 76 bool ignore_bad_cert); 77 bool SSLPostConnectionCheck(SSL* ssl, const char* host); 78 #if _DEBUG 79 static void SSLInfoCallback(const SSL* s, int where, int ret); 80 #endif // !_DEBUG 81 static int SSLVerifyCallback(int ok, X509_STORE_CTX* store); 82 static VerificationCallback custom_verify_callback_; 83 friend class OpenSSLStreamAdapter; // for custom_verify_callback_; 84 85 static bool ConfigureTrustedRootCertificates(SSL_CTX* ctx); 86 static SSL_CTX* SetupSSLContext(); 87 88 SSLState state_; 89 bool ssl_read_needs_write_; 90 bool ssl_write_needs_read_; 91 // If true, socket will retain SSL configuration after Close. 92 bool restartable_; 93 94 SSL* ssl_; 95 SSL_CTX* ssl_ctx_; 96 std::string ssl_host_name_; 97 98 bool custom_verification_succeeded_; 99 }; 100 101 ///////////////////////////////////////////////////////////////////////////// 102 103 } // namespace talk_base 104 105 #endif // TALK_BASE_OPENSSLADAPTER_H__ 106
