[IMPROVE] Add decoding for commonName (cn) and displayName attributes for SAML (#12347)

packages/meteor-accounts-saml/server/saml_server.js

@@ -117,7 +117,7 @@ Accounts.registerLoginHandler(function(loginRequest) {
 
 		if (!user) {
 			const newUser = {
-				name: loginResult.profile.cn || loginResult.profile.username,
+				name: loginResult.profile.displayName || loginResult.profile.cn || loginResult.profile.username,
 				active: true,
 				globalRoles: ['user'],
 				emails: emailList.map((email) => ({

packages/meteor-accounts-saml/server/saml_utils.js

@@ -361,6 +361,15 @@ SAML.prototype.mapAttributes = function(attributeStatement, profile) {
 	if (!profile.email && profile.mail) {
 		profile.email = profile.mail;
 	}
+
+	if (!profile.displayName && profile['urn:oid:2.16.840.1.113730.3.1.241']) {
+		profile.displayName = profile['urn:oid:2.16.840.1.113730.3.1.241'];
+	}
+
+	if (!profile.cn && profile['urn:oid:2.5.4.3']) {
+		profile.cn = profile['urn:oid:2.5.4.3'];
+	}
+
 };
 
 SAML.prototype.validateResponse = function(samlResponse, relayState, callback) {