Added m_ssl.cpp which allows Anope to use SSL when connecting to its uplink

src/modules/ssl/m_ssl.cpp

@@ -0,0 +1,150 @@
+/* RequiredLibraries: ssl,crypt */
+
+#include "module.h"
+
+#include <openssl/bio.h>
+#include <openssl/ssl.h>
+#include <openssl/err.h>
+#include <openssl/crypto.h>
+#include <openssl/evp.h>
+
+#define CERTFILE "anope.cert"
+#define KEYFILE "anope.key"
+
+static SSL_CTX *ctx;
+
+class SSLSocket : public Socket
+{
+ private:
+	SSL *sslsock;
+
+	int RecvInternal(char *buf, size_t sz) const
+	{
+		return SSL_read(sslsock, buf, sz);
+	}
+
+	int SendInternal(const std::string &buf) const
+	{
+		return SSL_write(sslsock, buf.c_str(), buf.size());
+	}
+ public:
+	SSLSocket(const std::string &nTargetHost, int nPort, const std::string &nBindHost = "", bool nIPv6 = false) : Socket(nTargetHost, nPort, nBindHost, nIPv6)
+	{
+		sslsock = SSL_new(ctx);
+		
+		if (!sslsock)
+			throw CoreException("Unable to initialize SSL socket");
+
+		SSL_set_connect_state(sslsock);
+		SSL_set_fd(sslsock, Sock);
+		SSL_connect(sslsock);
+
+		UplinkSock = this;
+	}
+
+	~SSLSocket()
+	{
+		SSL_shutdown(sslsock);
+		SSL_free(sslsock);
+
+		UplinkSock = NULL;
+	}
+
+	bool Read(const std::string &buf)
+	{
+		process(buf);
+		return true;
+	}
+};
+
+class SSLModule : public Module
+{
+ public:
+	SSLModule(const std::string &modname, const std::string &creator) : Module(modname, creator)
+	{
+		this->SetAuthor("Anope");
+		this->SetVersion("$Id$");
+		this->SetType(SUPPORTED);
+
+		SSL_load_error_strings();
+		SSLeay_add_ssl_algorithms();
+
+		ctx = SSL_CTX_new(SSLv23_client_method());
+
+		if (!ctx)
+		{
+			throw ModuleException("Error initializing SSL CTX");
+		}
+
+		if (IsFile(CERTFILE))
+		{
+			if (!SSL_CTX_use_certificate_file(ctx, CERTFILE, SSL_FILETYPE_PEM))
+			{
+				SSL_CTX_free(ctx);
+				throw ModuleException("Error loading certificate");
+			}
+		}
+		else
+		{
+			Alog() << "m_ssl: No certificate file found";
+		}
+
+		if (IsFile(KEYFILE))
+		{
+			if (!SSL_CTX_use_PrivateKey_file(ctx, KEYFILE, SSL_FILETYPE_PEM))
+			{
+				SSL_CTX_free(ctx);
+				throw ModuleException("Error loading private key");
+			}
+		}
+		else
+		{
+			if (IsFile(CERTFILE))
+			{
+				SSL_CTX_free(ctx);
+				throw ModuleException("Error loading private key - file not found");
+			}
+			else
+			{
+				Alog() << "m_ssl: No private key found";
+			}
+		}
+
+		SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2);
+		SSL_CTX_set_options(ctx, SSL_OP_TLS_ROLLBACK_BUG | SSL_OP_ALL);
+//		SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, always_accept_verify_cb);
+
+		ModuleManager::Attach(I_OnPreServerConnect, this);
+	}
+
+	~SSLModule()
+	{
+		SSL_CTX_free(ctx);
+	}
+
+	EventReturn OnPreServerConnect()
+	{
+		int servernum = 1;
+		for (std::list<Uplink *>::iterator curr_uplink = Config.Uplinks.begin(); curr_uplink != Config.Uplinks.end(); ++curr_uplink, ++servernum)
+		{
+			uplink_server = *curr_uplink;
+
+			try
+			{
+				new SSLSocket(uplink_server->host, uplink_server->port, Config.LocalHost ? Config.LocalHost : "", uplink_server->ipv6);
+			}
+			catch (SocketException& ex)
+			{
+				Alog() << "Unable to connect to server" << servernum << " (" << uplink_server->host << ":" << uplink_server->port << "), " << ex.GetReason();
+				continue;
+			}
+
+			Alog() << "Connected to Server " << servernum << " (" << uplink_server->host << ":" << uplink_server->port << ")";
+			return EVENT_ALLOW;
+		}
+
+		return EVENT_STOP;
+	}
+};
+
+MODULE_INIT(SSLModule)