Add tests for sha256-rsa-MGF1

test/saml-response-tests.spec.ts

@@ -22,6 +22,38 @@ describe("SAML response tests", function () {
     expect(result).to.be.true;
   });
 
+  it("test validating SAML response with sha256-rsa-MGF1", function () {
+    const xml = fs.readFileSync("./test/static/valid_saml_sha256_rsa_mgf1.xml", "utf-8");
+    const doc = new xmldom.DOMParser().parseFromString(xml);
+    const signature = xpath.select1(
+      "/*/*[local-name(.)='Signature' and namespace-uri(.)='http://www.w3.org/2000/09/xmldsig#']",
+      doc,
+    );
+    isDomNode.assertIsNodeLike(signature);
+    const sig = new SignedXml();
+    sig.publicCert = fs.readFileSync("./test/static/idp_certificate.pem");
+    sig.loadSignature(signature);
+    const result = sig.checkSignature(xml);
+
+    expect(result).to.be.true;
+  });
+
+  it("test validating SAML response with sha256-rsa-MGF1 fails for modified file", function () {
+    const xml = fs.readFileSync("./test/static/invalid_saml_sha256_rsa_mgf1.xml", "utf-8");
+    const doc = new xmldom.DOMParser().parseFromString(xml);
+    const signature = xpath.select1(
+      "/*/*[local-name(.)='Signature' and namespace-uri(.)='http://www.w3.org/2000/09/xmldsig#']",
+      doc,
+    );
+    isDomNode.assertIsNodeLike(signature);
+    const sig = new SignedXml();
+    sig.publicCert = fs.readFileSync("./test/static/idp_certificate.pem");
+    sig.loadSignature(signature);
+    const result = sig.checkSignature(xml);
+
+    expect(result).to.be.false;
+  });
+
   it("test validating wrapped assertion signature", function () {
     const xml = fs.readFileSync("./test/static/valid_saml_signature_wrapping.xml", "utf-8");
     const doc = new xmldom.DOMParser().parseFromString(xml);

test/signature-unit-tests.spec.ts

@@ -6,7 +6,76 @@ import * as crypto from "crypto";
 import { expect } from "chai";
 import * as isDomNode from "@xmldom/is-dom-node";
 
+const signatureAlgorithms = [
+  "http://www.w3.org/2000/09/xmldsig#rsa-sha1",
+  "http://www.w3.org/2001/04/xmldsig-more#rsa-sha256",
+  "http://www.w3.org/2007/05/xmldsig-more#sha256-rsa-MGF1",
+  "http://www.w3.org/2001/04/xmldsig-more#rsa-sha512"
+]
+
 describe("Signature unit tests", function () {
+
+  describe("sign and verify", function () {
+    signatureAlgorithms.forEach((signatureAlgorithm) => {
+      function signWith(signatureAlgorithm: string): string {
+        const xml = '<root><x attr="value"></x></root>';
+        const sig = new SignedXml();
+        sig.privateKey = fs.readFileSync("./test/static/client.pem");
+
+        sig.addReference({
+          xpath: "//*[local-name(.)='x']",
+          digestAlgorithm: "http://www.w3.org/2000/09/xmldsig#sha1",
+          transforms: ["http://www.w3.org/2001/10/xml-exc-c14n#"],
+        });
+
+        sig.canonicalizationAlgorithm = "http://www.w3.org/2001/10/xml-exc-c14n#";
+        sig.signatureAlgorithm = signatureAlgorithm;
+        sig.computeSignature(xml);
+        return sig.getSignedXml()
+      }
+
+      function loadSignature(xml: string): SignedXml {
+        const doc = new xmldom.DOMParser().parseFromString(xml);
+        const node = xpath.select1(
+          "//*[local-name(.)='Signature' and namespace-uri(.)='http://www.w3.org/2000/09/xmldsig#']",
+          doc,
+        );
+        isDomNode.assertIsNodeLike(node);
+        const sig = new SignedXml();
+        sig.publicCert = fs.readFileSync("./test/static/client_public.pem");
+        sig.loadSignature(node);
+        return sig;
+      }
+
+      it(`should verify signed xml with ${signatureAlgorithm}`, function () {
+        const xml = signWith(signatureAlgorithm)
+        const sig = loadSignature(xml)
+        const res = sig.checkSignature(xml);
+        expect(res, "expected all signatures to be valid, but some reported invalid").to.be.true;
+      });
+
+      it(`should fail verification of signed xml with ${signatureAlgorithm} after manipulation`, function () {
+        const xml = signWith(signatureAlgorithm)
+        const doc = new xmldom.DOMParser().parseFromString(xml);
+        const nodes = xpath.select(
+          "//*[local-name(.)='x']",
+          doc,
+        );
+        isDomNode.assertIsArrayOfNodes(nodes);
+        expect(nodes.length).to.equal(1)
+        const node = nodes[0];
+        isDomNode.assertIsElementNode(node);
+        const targetElement = node as Element;
+        targetElement.setAttribute("attr", "manipulatedValue")
+        const manipulatedXml = new xmldom.XMLSerializer().serializeToString(doc)
+
+        const sig = loadSignature(manipulatedXml)
+        const res = sig.checkSignature(manipulatedXml);
+        expect(res, "expected all signatures to be invalid, but some reported valid").to.be.false;
+      });
+    });
+  });
+
   describe("verify adds ID", function () {
     function nodeExists(doc, xpathArg) {
       if (!doc && !xpathArg) {

test/static/idp_certificate.pem

@@ -0,0 +1,30 @@
+-----BEGIN CERTIFICATE-----
+MIIFFzCCAv+gAwIBAgIUaAU88KUbZLe7NwTw+jdCHIDU6wIwDQYJKoZIhvcNAQEL
+BQAwGjEYMBYGA1UEAwwPaWRwLmV4YW1wbGUuY29tMCAXDTI1MDkwODExMTUzMFoY
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+DyjZYv/tviuWfM8=
+-----END CERTIFICATE-----

test/static/idp_private_key.pem

@@ -0,0 +1,52 @@
+-----BEGIN PRIVATE KEY-----
+MIIJQgIBADANBgkqhkiG9w0BAQEFAASCCSwwggkoAgEAAoICAQDXpgSoph176VQP
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+-----END PRIVATE KEY-----

test/static/invalid_saml_sha256_rsa_mgf1.xml

@@ -0,0 +1,94 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?><samlp:Response xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion" Destination="https://acs.example.com/" ID="_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" InResponseTo="inResponseTo" IssueInstant="2000-01-01T01:00:00Z" Version="2.0"><ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
+<ds:SignedInfo>
+<ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
+<ds:SignatureMethod Algorithm="http://www.w3.org/2007/05/xmldsig-more#sha256-rsa-MGF1"/>
+<ds:Reference URI="">
+<ds:Transforms>
+<ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
+<ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
+</ds:Transforms>
+<ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
+<ds:DigestValue>bA/90zzLS/36DstvPJRrMNwGax5WQv8NneSuNdLnMYs=</ds:DigestValue>
+</ds:Reference>
+</ds:SignedInfo>
+<ds:SignatureValue>
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+</ds:SignatureValue>
+<ds:KeyInfo>
+<ds:KeyValue>
+<ds:RSAKeyValue>
+<ds:Modulus>
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+</ds:Modulus>
+<ds:Exponent>AQAB</ds:Exponent>
+</ds:RSAKeyValue>
+</ds:KeyValue>
+<ds:X509Data>
+<ds:X509Certificate>
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+CREu3zQABqNW8LMOfraF5BMwDwYDVR0TAQH/BAUwAwEB/zANBgkqhkiG9w0BAQsFAAOCAgEAA6Jm
+3pll7XHBY/oXrtRAu60RpH4pcZBSf68zhCQKUnXALy2FWrUGU8uVCJJuxXIcxszTOCZmwVF12Yce
+IFpBrWHxKCDZWYDO6hrwZvsa2vh5mXDZo3c/HX6GmJR4f4oIIZnbxFhXR30419PlrwMW3Rk7rnVS
+Dz/HpQfdS4y8jYgsm2dIRo+PXQytFRCDj4afsT3eZa27QjFxLTuK+SwkhupSH1WWYmqL9+iIJiLL
+/ntfM4MwtOUwcfqI0ttbvFZZIPneBCuEDLn/zJ/QBV3ZvjQDt53W21HaPGPHBBfVZVroZPvuGvul
+WRLeECI1Hmbl3al/2aOC0LWzPIk8dlTcN+EWcCEufpTOEgkob8waEyxlX0Z5OBjkCHpyDTPGkxBB
+OCJv88Frx7qdbu8eSV0OviuaM/B7ky2NbDMKIybX4tf/Q8FNfjPLvTv+8nbrMz6kTno3RR2YC7tt
+I7Glb/eOg3F/ouF4wcoPAj+OyU5Q5WJMMaZ9cXF9pwszsglLbFms+WD5PFxlloh6I1hO7TccWKTe
+UJ5fYZSYYm31JqWit3DBltXTyRyL7KFSdT/FyRBk62YLCJqJmcukIUJUTya73/RmjW1M4zMBNaIj
+/pH77opKWnVbm9F4XnBCG4r9+FRXdV2zKW6DgvDzQ6DaZ+0cwC36vSqkDyjZYv/tviuWfM8=
+</ds:X509Certificate>
+</ds:X509Data>
+</ds:KeyInfo>
+</ds:Signature>
+    <saml:Issuer>https://idp.example.com/</saml:Issuer>
+    <samlp:Status>
+        <samlp:StatusCode Value="urn:oasis:names:tc:SAML:2.0:status:Success"/>
+    </samlp:Status>
+    <saml:Assertion xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ID="_bbbbbbbbbbbbbbbbbbbbbbbb" IssueInstant="2000-01-01T01:00:00Z" Version="2.0">
+        <saml:Issuer>https://idp.example.com/</saml:Issuer>
+        <saml:Subject>
+            <saml:NameID Format="urn:oasis:names:tc:SAML:2.0:nameid-format:transient" SPNameQualifier="audience">modifiedFakeNameId</saml:NameID>
+            <saml:SubjectConfirmation Method="urn:oasis:names:tc:SAML:2.0:cm:bearer">
+                <saml:SubjectConfirmationData InResponseTo="inResponseTo" NotOnOrAfter="3000-01-01T01:00:00Z" Recipient="https://acs.example.com/"/>
+            </saml:SubjectConfirmation>
+        </saml:Subject>
+        <saml:Conditions NotBefore="2000-01-01T01:00:00Z" NotOnOrAfter="3000-01-01T01:00:00Z">
+            <saml:AudienceRestriction>
+                <saml:Audience>audience</saml:Audience>
+            </saml:AudienceRestriction>
+        </saml:Conditions>
+        <saml:AuthnStatement AuthnInstant="2000-01-01T01:00:00Z" SessionIndex="42" SessionNotOnOrAfter="3000-01-01T01:00:00Z">
+            <saml:AuthnContext>
+                <saml:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:Password</saml:AuthnContextClassRef>
+            </saml:AuthnContext>
+        </saml:AuthnStatement>
+    </saml:Assertion>
+</samlp:Response>

test/static/unsigned_saml_response.xml

@@ -0,0 +1,46 @@
+<samlp:Response
+    xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol"
+    xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion"
+    ID="_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+    Version="2.0"
+    IssueInstant="2000-01-01T01:00:00Z"
+    Destination="https://acs.example.com/"
+    InResponseTo="inResponseTo">
+    <saml:Issuer>https://idp.example.com/</saml:Issuer>
+    <samlp:Status>
+        <samlp:StatusCode Value="urn:oasis:names:tc:SAML:2.0:status:Success"/>
+    </samlp:Status>
+    <saml:Assertion
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xmlns:xs="http://www.w3.org/2001/XMLSchema"
+        ID="_bbbbbbbbbbbbbbbbbbbbbbbb"
+        Version="2.0" IssueInstant="2000-01-01T01:00:00Z">
+        <saml:Issuer>https://idp.example.com/</saml:Issuer>
+        <saml:Subject>
+            <saml:NameID
+                SPNameQualifier="audience"
+                Format="urn:oasis:names:tc:SAML:2.0:nameid-format:transient">nameId</saml:NameID>
+            <saml:SubjectConfirmation Method="urn:oasis:names:tc:SAML:2.0:cm:bearer">
+                <saml:SubjectConfirmationData
+                    NotOnOrAfter="3000-01-01T01:00:00Z"
+                    Recipient="https://acs.example.com/"
+                    InResponseTo="inResponseTo"/>
+            </saml:SubjectConfirmation>
+        </saml:Subject>
+        <saml:Conditions
+            NotBefore="2000-01-01T01:00:00Z"
+            NotOnOrAfter="3000-01-01T01:00:00Z">
+            <saml:AudienceRestriction>
+                <saml:Audience>audience</saml:Audience>
+            </saml:AudienceRestriction>
+        </saml:Conditions>
+        <saml:AuthnStatement
+            AuthnInstant="2000-01-01T01:00:00Z"
+            SessionNotOnOrAfter="3000-01-01T01:00:00Z"
+            SessionIndex="42">
+            <saml:AuthnContext>
+                <saml:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:Password</saml:AuthnContextClassRef>
+            </saml:AuthnContext>
+        </saml:AuthnStatement>
+    </saml:Assertion>
+</samlp:Response>