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
@@ -326,85 +334,126 @@ public:
 
 	int clientTryAgain()
 	{
-		if(step == 0) {
+		if( out_mech == "PLAIN" ) {
-			out_mech = "DIGEST-MD5";
+			if(step == 0) {
-			++step;
+				// First, check if we have everything
-			return Continue;
+				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;
 		}
-		else if(step == 1) {
+
-			// if we still need params, then the app has failed us!
+		if( out_mech == "DIGEST-MD5" ) {
-			if(need.user || need.authzid || need.pass || need.realm) {
+			if(step == 0) {
-				err = -1;
+				++step;
-				return Error;
+				return Continue;
 			}
+			else if(step == 1) {
+				// if we still need params, then the app has failed us!
+				if(need.user || need.authzid || need.pass || need.realm) {
+					err = -1;
+					return Error;
+				}
 
-			// see if some params are needed
+				// see if some params are needed
-			if(!have.user)
+				if(!have.user)
-				need.user = true;
+					need.user = true;
-			if(!have.authzid)
+				if(!have.authzid)
-				need.authzid = true;
+					need.authzid = true;
-			if(!have.pass)
+				if(!have.pass)
-				need.pass = true;
+					need.pass = true;
-			if(need.user || need.authzid || need.pass)
+				if(need.user || need.authzid || need.pass)
-				return NeedParams;
+					return NeedParams;
-
+
-			// get props
+				// get props
-			TQCString cs(in_buf.data(), in_buf.size()+1);
+				TQCString cs(in_buf.data(), in_buf.size()+1);
-			PropList in;
+				PropList in;
-			if(!in.fromString(cs)) {
+				if(!in.fromString(cs)) {
-				err = TQCA::SASL::BadProto;
+					err = TQCA::SASL::BadProto;
-				return Error;
+					return Error;
+				}
+
+				// make a cnonce
+				TQByteArray a(32);
+				for(int n = 0; n < (int)a.size(); ++n)
+					a[n] = (char)(256.0*rand()/(RAND_MAX+1.0));
+				TQCString cnonce = Base64::arrayToString(a).latin1();
+
+				// make other variables
+				realm = host;
+				TQCString nonce = in.get("nonce");
+				TQCString nc = "00000001";
+				TQCString uri = service.utf8() + '/' + host.utf8();
+				TQCString qop = "auth";
+
+				// build 'response'
+				TQCString X = user.utf8() + ':' + realm.utf8() + ':' + pass.utf8();
+				TQByteArray Y = TQCA::MD5::hash(X);
+				TQCString tmp = TQCString(":") + nonce + ':' + cnonce + ':' + authz.utf8();
+				TQByteArray A1(Y.size() + tmp.length());
+				memcpy(A1.data(), Y.data(), Y.size());
+				memcpy(A1.data() + Y.size(), tmp.data(), tmp.length());
+				TQCString A2 = "AUTHENTICATE:" + uri;
+				TQCString HA1 = TQCA::MD5::hashToString(A1).latin1();
+				TQCString HA2 = TQCA::MD5::hashToString(A2).latin1();
+				TQCString KD = HA1 + ':' + nonce + ':' + nc + ':' + cnonce + ':' + qop + ':' + HA2;
+				TQCString Z = TQCA::MD5::hashToString(KD).latin1();
+
+				// build output
+				PropList out;
+				out.set("username", user.utf8());
+				out.set("realm", host.utf8());
+				out.set("nonce", nonce);
+				out.set("cnonce", cnonce);
+				out.set("nc", nc);
+				out.set("serv-type", service.utf8());
+				out.set("host", host.utf8());
+				out.set("digest-uri", uri);
+				out.set("qop", qop);
+				out.set("response", Z);
+				out.set("charset", "utf-8");
+				out.set("authzid", authz.utf8());
+				TQCString s = out.toString();
+
+				// done
+				out_buf.resize(s.length());
+				memcpy(out_buf.data(), s.data(), out_buf.size());
+				++step;
+				return Continue;
 			}
 
-			// make a cnonce
-			TQByteArray a(32);
-			for(int n = 0; n < (int)a.size(); ++n)
-				a[n] = (char)(256.0*rand()/(RAND_MAX+1.0));
-			TQCString cnonce = Base64::arrayToString(a).latin1();
-
-			// make other variables
-			realm = host;
-			TQCString nonce = in.get("nonce");
-			TQCString nc = "00000001";
-			TQCString uri = service.utf8() + '/' + host.utf8();
-			TQCString qop = "auth";
-
-			// build 'response'
-			TQCString X = user.utf8() + ':' + realm.utf8() + ':' + pass.utf8();
-			TQByteArray Y = TQCA::MD5::hash(X);
-			TQCString tmp = TQCString(":") + nonce + ':' + cnonce + ':' + authz.utf8();
-			TQByteArray A1(Y.size() + tmp.length());
-			memcpy(A1.data(), Y.data(), Y.size());
-			memcpy(A1.data() + Y.size(), tmp.data(), tmp.length());
-			TQCString A2 = "AUTHENTICATE:" + uri;
-			TQCString HA1 = TQCA::MD5::hashToString(A1).latin1();
-			TQCString HA2 = TQCA::MD5::hashToString(A2).latin1();
-			TQCString KD = HA1 + ':' + nonce + ':' + nc + ':' + cnonce + ':' + qop + ':' + HA2;
-			TQCString Z = TQCA::MD5::hashToString(KD).latin1();
-
-			// build output
-			PropList out;
-			out.set("username", user.utf8());
-			out.set("realm", host.utf8());
-			out.set("nonce", nonce);
-			out.set("cnonce", cnonce);
-			out.set("nc", nc);
-			out.set("serv-type", service.utf8());
-			out.set("host", host.utf8());
-			out.set("digest-uri", uri);
-			out.set("qop", qop);
-			out.set("response", Z);
-			out.set("charset", "utf-8");
-			out.set("authzid", authz.utf8());
-			TQCString s = out.toString();
-
-			// done
-			out_buf.resize(s.length());
-			memcpy(out_buf.data(), s.data(), out_buf.size());
-			++step;
-			return Continue;
-		}
-		else {
 			out_buf.resize(0);
 			return Success;
 		}