normalize line endings before signature validation

Author: mhassan1

src/passport-saml/saml.ts

@@ -752,6 +752,7 @@ class SAML {
     if (totalReferencedNodes.length > 1) {
       return false;
     }
+    fullXml = fullXml.replace(/\r\n?/g, '\n');
     return sig.checkSignature(fullXml);
   }
 

test/test-signatures.js

@@ -17,22 +17,26 @@ describe('Signatures', function() {
             done(ex);
           }
         },
-        testOneResponse        = ( pathToXml, shouldErrorWith, amountOfSignatureChecks = 1 ) => {
+        testOneResponseBody    = ( samlResponseBody, shouldErrorWith, amountOfSignatureChecks = 1 ) => {
           return done => {
             //== Instantiate new instance before every test
             const samlObj              = new SAML({ cert });
             //== Spy on `validateSignature` to be able to count how many times it has been called
             const validateSignatureSpy = sinon.spy(samlObj, 'validateSignature');
 
-            //== Create a body bases on an XML an run the test in `func`
-            samlObj.validatePostResponse(createBody(pathToXml), tryCatchTest(done, function( error ) {
+            //== Run the test in `func`
+            samlObj.validatePostResponse(samlResponseBody, tryCatchTest(done, function( error ) {
               //== Assert error. If the error is `SAML assertion expired` we made it past the certificate validation
               shouldErrorWith ? error.should.eql(new Error(shouldErrorWith)) : error.should.eql(new Error('SAML assertion expired'));
               //== Assert times `validateSignature` was called
               validateSignatureSpy.callCount.should.eql(amountOfSignatureChecks);
               done();
             }));
           };
+        },
+        testOneResponse        = ( pathToXml, ...args ) => {
+          //== Create a body based on an XML and run the test
+          return testOneResponseBody(createBody(pathToXml), ...args);
         };
 
   describe('Signatures on saml:Response - Only 1 saml:Assertion', () => {
@@ -80,4 +84,20 @@ describe('Signatures', function() {
 
   });
 
+  describe('Signature on saml:Response with non-LF line endings', () => {
+    const samlResponseXml = fs.readFileSync(__dirname + '/static/signatures/valid/response.root-signed.assertion-signed.xml').toString();
+    const makeBody = str => ({ SAMLResponse: Buffer.from(str).toString('base64') });
+
+    it('CRLF line endings', done => {
+      const body = makeBody(samlResponseXml.replace(/\n/g, '\r\n'));
+      testOneResponseBody(body, false, 1)(done);
+    });
+
+    it('CR line endings', done => {
+      const body = makeBody(samlResponseXml.replace(/\n/g, '\r'));
+      testOneResponseBody(body, false, 1)(done);
+    });
+
+  });
+
 });