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authorMattes D <github@xoft.cz>2016-08-22 19:53:34 +0200
committerMattes D <github@xoft.cz>2016-08-22 23:44:36 +0200
commit641cb063bc71acc7f29d25b12c8713a8beb2018c (patch)
tree0cc4578cfcdc3969f689f974706c78d2dd15b00f /src/OSSupport/TCPLinkImpl.h
parentUrlClient: Basic HTTP implementation. (diff)
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Diffstat (limited to '')
-rw-r--r--src/OSSupport/TCPLinkImpl.h75
1 files changed, 75 insertions, 0 deletions
diff --git a/src/OSSupport/TCPLinkImpl.h b/src/OSSupport/TCPLinkImpl.h
index bea21aeff..b54c1a2cc 100644
--- a/src/OSSupport/TCPLinkImpl.h
+++ b/src/OSSupport/TCPLinkImpl.h
@@ -14,6 +14,7 @@
#include "Network.h"
#include <event2/event.h>
#include <event2/bufferevent.h>
+#include "../PolarSSL++/SslContext.h"
@@ -64,9 +65,73 @@ public:
virtual UInt16 GetRemotePort(void) const override { return m_RemotePort; }
virtual void Shutdown(void) override;
virtual void Close(void) override;
+ virtual AString StartTLSClient(
+ cX509CertPtr a_OwnCert,
+ cCryptoKeyPtr a_OwnPrivKey
+ ) override;
+ virtual AString StartTLSServer(
+ cX509CertPtr a_OwnCert,
+ cCryptoKeyPtr a_OwnPrivKey,
+ const AString & a_StartTLSData
+ ) override;
protected:
+ // fwd:
+ class cLinkTlsContext;
+ typedef SharedPtr<cLinkTlsContext> cLinkTlsContextPtr;
+ typedef WeakPtr<cLinkTlsContext> cLinkTlsContextWPtr;
+
+ /** Wrapper around cSslContext that is used when this link is being encrypted by SSL. */
+ class cLinkTlsContext :
+ public cSslContext
+ {
+ cTCPLinkImpl & m_Link;
+
+ /** Buffer for storing the incoming encrypted data until it is requested by the SSL decryptor. */
+ AString m_EncryptedData;
+
+ /** Buffer for storing the outgoing cleartext data until the link has finished handshaking. */
+ AString m_CleartextData;
+
+ /** Shared ownership of self, so that this object can keep itself alive for as long as it needs. */
+ cLinkTlsContextWPtr m_Self;
+
+ public:
+ cLinkTlsContext(cTCPLinkImpl & a_Link);
+
+ /** Shares ownership of self, so that this object can keep itself alive for as long as it needs. */
+ void SetSelf(cLinkTlsContextWPtr a_Self);
+
+ /** Removes the self ownership so that we can detect the SSL closure. */
+ void ResetSelf(void);
+
+ /** Stores the specified block of data into the buffer of the data to be decrypted (incoming from remote).
+ Also flushes the SSL buffers by attempting to read any data through the SSL context. */
+ void StoreReceivedData(const char * a_Data, size_t a_NumBytes);
+
+ /** Tries to read any cleartext data available through the SSL, reports it in the link. */
+ void FlushBuffers(void);
+
+ /** Tries to finish handshaking the SSL. */
+ void TryFinishHandshaking(void);
+
+ /** Sends the specified cleartext data over the SSL to the remote peer.
+ If the handshake hasn't been completed yet, queues the data for sending when it completes. */
+ void Send(const void * a_Data, size_t a_Length);
+
+ // cSslContext overrides:
+ virtual int ReceiveEncrypted(unsigned char * a_Buffer, size_t a_NumBytes) override;
+ virtual int SendEncrypted(const unsigned char * a_Buffer, size_t a_NumBytes) override;
+
+ /** Returns true if the context's associated TCP link is the same link as a_Link. */
+ bool IsLink(cTCPLinkImpl * a_Link)
+ {
+ return (a_Link == &m_Link);
+ }
+ };
+
+
/** Callbacks to call when the connection is established.
May be NULL if not used. Only used for outgoing connections (cNetwork::Connect()). */
cNetwork::cConnectCallbacksPtr m_ConnectCallbacks;
@@ -99,6 +164,10 @@ protected:
data is sent to the OS TCP stack, the socket gets shut down. */
bool m_ShouldShutdown;
+ /** The SSL context used for encryption, if this link uses SSL.
+ If valid, the link uses encryption through this context. */
+ cLinkTlsContextPtr m_TlsContext;
+
/** Creates a new link to be queued to connect to a specified host:port.
Used for outgoing connections created using cNetwork::Connect().
@@ -127,6 +196,12 @@ protected:
/** Calls shutdown on the link and disables LibEvent writing.
Called after all data from LibEvent buffers is sent to the OS TCP stack and shutdown() has been called before. */
void DoActualShutdown(void);
+
+ /** Sends the data directly to the socket (without the optional TLS). */
+ bool SendRaw(const void * a_Data, size_t a_Length);
+
+ /** Called by the TLS when it has decoded a piece of incoming cleartext data from the socket. */
+ void ReceivedCleartextData(const char * a_Data, size_t a_Length);
};