Kopete - jabber: Add SASL PLAIN method for authentication

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit a9aee0e6e0)

kopete/protocols/jabber/libiris/iris/xmpp-core/simplesasl.cpp

@@ -155,6 +155,7 @@ public:
 	TQString out_mech;
 	TQByteArray out_buf;
 	bool capable;
+	bool allow_plain;
 	int err;
 
 	TQCA_SASLNeedParams need;
@@ -207,12 +208,13 @@ public:
 		host = _host;
 	}
 
-	void setSecurityProps(bool, bool, bool, bool, bool reqForward, bool reqCreds, bool reqMutual, int ssfMin, int, const TQString &, int)
+	void setSecurityProps(bool noPlain, bool, bool, bool, bool reqForward, bool reqCreds, bool reqMutual, int ssfMin, int, const TQString &, int)
 	{
 		if(reqForward || reqCreds || reqMutual || ssfMin > 0)
 			capable = false;
 		else
 			capable = true;
+		allow_plain = !noPlain;
 	}
 
 	int security() const
@@ -228,8 +230,17 @@ public:
 	bool clientStart(const TQStringList &mechlist)
 	{
 		bool haveMech = false;
+		resetState();
+		step = 0;
+
 		for(TQStringList::ConstIterator it = mechlist.begin(); it != mechlist.end(); ++it) {
+			if((*it) == "PLAIN" && allow_plain) {
+				out_mech = "PLAIN";
+				haveMech = true;
+				break;
+			}
 			if((*it) == "DIGEST-MD5") {
+				out_mech = "DIGEST-MD5";
 				haveMech = true;
 				break;
 			}
@@ -238,9 +249,6 @@ public:
 			err = TQCA::SASL::NoMech;
 			return false;
 		}
-
-		resetState();
-		step = 0;
 		return true;
 	}
 
@@ -316,7 +324,7 @@ public:
 
 	const TQByteArray *clientInit() const
 	{
-		return 0;
+		return out_mech == "PLAIN" ? &out_buf : 0;
 	}
 
 	TQByteArray result() const
@@ -326,8 +334,49 @@ public:
 
 	int clientTryAgain()
 	{
+		if( out_mech == "PLAIN" ) {
+			if(step == 0) {
+				// First, check if we have everything
+				if(need.user || need.pass) {
+					err = -1;
+					return Error;
+				}
+				if(!have.user) {
+					need.user = true;
+				}
+				if(!have.pass) {
+					need.pass = true;
+				}
+				if(need.user || need.pass) {
+					return NeedParams;
+				}
+
+				TQCString authz_ = authz.utf8();
+				TQCString user_ = user.utf8();
+				TQCString pass_ = pass.utf8();
+				int l = 0;
+
+				out_buf.resize(authz_.length() + 1 + user_.length() + 1 + pass_.length());
+				memcpy(&out_buf[l], authz_.data(), authz_.length());
+				l += authz_.length();
+				out_buf[l] = '\0';
+				l += 1;
+				memcpy(&out_buf[l], user_.data(), user_.length());
+				l += user_.length();
+				out_buf[l] = '\0';
+				l += 1;
+
+				memcpy(&out_buf[l], pass_.data(), pass_.length());
+				++step;
+				return Continue;
+			}
+
+			out_buf.resize(0);
+			return Success;
+		}
+
+		if( out_mech == "DIGEST-MD5" ) {
 			if(step == 0) {
-			out_mech = "DIGEST-MD5";
 				++step;
 				return Continue;
 			}
@@ -404,7 +453,7 @@ public:
 				++step;
 				return Continue;
 			}
-		else {
+
 			out_buf.resize(0);
 			return Success;
 		}