refactor(security): extend SAML prefix handling (twentyhq#10047)

Revised parsing logic to handle multiple XML prefixes for SAML metadata,
improving flexibility in handling diverse metadata structures. Added
corresponding test case to ensure robustness of the implementation.

Author: AMoreaux

packages/twenty-front/src/modules/settings/security/utils/__tests__/parseSAMLMetadataFromXMLFile.test.ts

@@ -28,6 +28,31 @@ describe('parseSAMLMetadataFromXMLFile', () => {
       },
     });
   });
+  it('should parse SAML metadata from XML file with prefix', () => {
+    const xmlString = `<?xml version="1.0" encoding="UTF-8"?><ns0:EntityDescriptor xmlns:ns0="urn:oasis:names:tc:SAML:2.0:metadata" entityID="https://test.com" validUntil="2026-02-04T17:46:23.000Z">
+    <ns0:IDPSSODescriptor WantAuthnRequestsSigned="false" protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol">
+        <ns0:KeyDescriptor use="signing">
+            <ns2:KeyInfo xmlns:ns2="http://www.w3.org/2000/09/xmldsig#">
+                <ns2:X509Data>
+                    <ns2:X509Certificate>test</ns2:X509Certificate>
+                </ns2:X509Data>
+            </ns2:KeyInfo>
+        </ns0:KeyDescriptor>
+        <ns0:NameIDFormat>urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress</ns0:NameIDFormat>
+        <ns0:SingleSignOnService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect" Location="https://test.com"/>
+        <ns0:SingleSignOnService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://test.com"/>
+    </ns0:IDPSSODescriptor>
+</ns0:EntityDescriptor>`;
+    const result = parseSAMLMetadataFromXMLFile(xmlString);
+    expect(result).toEqual({
+      success: true,
+      data: {
+        entityID: 'https://test.com',
+        ssoUrl: 'https://test.com',
+        certificate: 'test',
+      },
+    });
+  });
   it('should return error if XML is invalid', () => {
     const xmlString = 'invalid xml';
     const result = parseSAMLMetadataFromXMLFile(xmlString);

packages/twenty-front/src/modules/settings/security/utils/parseSAMLMetadataFromXMLFile.ts

@@ -8,26 +8,36 @@ const validator = z.object({
   certificate: z.string().min(1),
 });
 
+const allPrefix = ['md', 'ns0', 'ns2', 'dsig', 'ds'];
+
 const getByPrefixAndKey = (
   xmlDoc: Document | Element,
   key: string,
-  prefix = 'md',
+  prefixList = [...allPrefix],
 ): Element | undefined => {
+  if (prefixList.length === 0) return undefined;
   return (
-    xmlDoc.getElementsByTagName(`${prefix}:${key}`)?.[0] ??
-    xmlDoc.getElementsByTagName(`${key}`)?.[0]
+    xmlDoc.getElementsByTagName(`${prefixList[0]}:${key}`)?.[0] ??
+    getByPrefixAndKey(xmlDoc, key, prefixList.slice(1)) ??
+    xmlDoc.getElementsByTagName(key)?.[0]
   );
 };
 
 const getAllByPrefixAndKey = (
   xmlDoc: Document | Element,
   key: string,
-  prefix = 'md',
-) => {
-  const withPrefix = xmlDoc.getElementsByTagName(`${prefix}:${key}`);
+  prefixList = [...allPrefix],
+): Array<Element> => {
+  const withPrefix = xmlDoc.getElementsByTagName(`${prefixList[0]}:${key}`);
+
   if (withPrefix.length !== 0) {
     return Array.from(withPrefix);
   }
+
+  if (prefixList.length > 0) {
+    return getAllByPrefixAndKey(xmlDoc, key, prefixList.slice(1));
+  }
+
   return Array.from(xmlDoc.getElementsByTagName(`${key}`));
 };
 
@@ -52,16 +62,15 @@ export const parseSAMLMetadataFromXMLFile = (
     const keyDescriptors = getByPrefixAndKey(IDPSSODescriptor, 'KeyDescriptor');
     if (!keyDescriptors) throw new Error('No KeyDescriptor found');
 
-    const keyInfo = getByPrefixAndKey(keyDescriptors, 'KeyInfo', 'ds');
+    const keyInfo = getByPrefixAndKey(keyDescriptors, 'KeyInfo');
     if (!keyInfo) throw new Error('No KeyInfo found');
 
-    const x509Data = getByPrefixAndKey(keyInfo, 'X509Data', 'ds');
+    const x509Data = getByPrefixAndKey(keyInfo, 'X509Data');
     if (!x509Data) throw new Error('No X509Data found');
 
     const x509Certificate = getByPrefixAndKey(
       x509Data,
       'X509Certificate',
-      'ds',
     )?.textContent?.trim();
     if (!x509Certificate) throw new Error('No X509Certificate found');