handle signature type for SAM 3.1

SAM.cpp

@@ -3,6 +3,7 @@
 #ifdef _MSC_VER
 #include <stdlib.h>
 #endif
+#include <boost/lexical_cast.hpp>
 #include "base64.h"
 #include "Identity.h"
 #include "Log.h"
@@ -245,6 +246,8 @@ namespace client
 			SendMessageReply (SAM_SESSION_CREATE_DUPLICATED_ID, strlen(SAM_SESSION_CREATE_DUPLICATED_ID), true);
 			return;
 		}
+
+		// create destination	
 		m_Session = m_Owner.CreateSession (id, destination == SAM_VALUE_TRANSIENT ? "" : destination, &params); 
 		if (m_Session)
 		{
@@ -642,7 +645,18 @@ namespace client
 			localDestination = i2p::client::context.CreateNewLocalDestination (keys, true, params);
 		}
 		else // transient
-			localDestination = i2p::client::context.CreateNewLocalDestination (false, i2p::data::SIGNING_KEY_TYPE_DSA_SHA1, params); 
+		{
+			// extract signature type
+			i2p::data::SigningKeyType signatureType = i2p::data::SIGNING_KEY_TYPE_DSA_SHA1;
+			if (params)
+			{
+				auto it = params->find (SAM_PARAM_SIGNATURE_TYPE);
+				if (it != params->end ())
+					// TODO: extract string values	
+					signatureType = boost::lexical_cast<int> (it->second);
+			}
+			localDestination = i2p::client::context.CreateNewLocalDestination (false, signatureType, params); 
+		}
 		if (localDestination)
 		{
 			SAMSession session;

SAM.h

@@ -51,6 +51,7 @@ namespace client
 	const char SAM_PARAM_SILENT[] = "SILENT";
 	const char SAM_PARAM_DESTINATION[] = "DESTINATION";	
 	const char SAM_PARAM_NAME[] = "NAME";
+	const char SAM_PARAM_SIGNATURE_TYPE[] = "SIGNATURE_TYPE";		
 	const char SAM_VALUE_TRANSIENT[] = "TRANSIENT";	
 	const char SAM_VALUE_STREAM[] = "STREAM";
 	const char SAM_VALUE_DATAGRAM[] = "DATAGRAM";
@@ -149,8 +150,8 @@ namespace client
 			void Stop ();
 			
 			boost::asio::io_service& GetService () { return m_Service; };
-			SAMSession * CreateSession (const std::string& id, const std::string& destination = "", // empty string  means transient
-				const std::map<std::string, std::string> * params = nullptr);
+			SAMSession * CreateSession (const std::string& id, const std::string& destination, // empty string  means transient
+				const std::map<std::string, std::string> * params);
 			void CloseSession (const std::string& id);
 			SAMSession * FindSession (const std::string& id);