Update cert pinning implementation

Use binary certificate (der)

Sources/ReportingFeature/SendReport.swift

@@ -51,30 +51,32 @@ private final class SessionDelegate: NSObject, URLSessionDelegate {
         didReceive challenge: URLAuthenticationChallenge,
         completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void
     ) {
-        let authenticationMethod = challenge.protectionSpace.authenticationMethod
-        if authenticationMethod == NSURLAuthenticationMethodServerTrust,
-           let serverTrust = challenge.protectionSpace.serverTrust,
-           handleServerTrustChallenge(serverTrust) {
-            completionHandler(.useCredential, URLCredential(trust: serverTrust))
-            return
-        }
-        completionHandler(.cancelAuthenticationChallenge, nil)
+        let authMethod = challenge.protectionSpace.authenticationMethod
+        guard authMethod == NSURLAuthenticationMethodServerTrust else {
+            return completionHandler(.cancelAuthenticationChallenge, nil)
         }
+
+        guard let serverTrust = challenge.protectionSpace.serverTrust else {
+            return completionHandler(.cancelAuthenticationChallenge, nil)
         }
 
-private func handleServerTrustChallenge(_ serverTrust: SecTrust) -> Bool {
         guard let serverCert = SecTrustGetCertificateAtIndex(serverTrust, 0) else {
-        return false
+            return completionHandler(.cancelAuthenticationChallenge, nil)
         }
 
         let serverCertCFData = SecCertificateCopyData(serverCert)
-    let serverCertNSData = NSData(
+        let serverCertData = Data(
             bytes: CFDataGetBytePtr(serverCertCFData),
-        length: CFDataGetLength(serverCertCFData)
+            count: CFDataGetLength(serverCertCFData)
         )
 
-    let localCertPath = Bundle.module.path(forResource: "report_cert", ofType: "crt")!
-    let localCertNSData = NSData(contentsOfFile: localCertPath)!
+        let localCertURL = Bundle.module.url(forResource: "report_cert", withExtension: "der")!
+        let localCertData = try! Data(contentsOf: localCertURL)
 
-    return serverCertNSData.isEqual(to: localCertNSData as Data)
+        guard serverCertData == localCertData else {
+            return completionHandler(.cancelAuthenticationChallenge, nil)
+        }
+
+        completionHandler(.useCredential, URLCredential(trust: serverTrust))
+    }
 }