Swift 2.0 和 XCode 7 中的服务器身份验证被破坏

Question

我刚刚将我的代码更新到 Swift 2.0 以使用 Xcode 7。我的应用程序执行 NSURLAuthenticationMethodServerTrust 和 NSURLAuthenticationMethodClientCertificate 身份验证。

问题是NSURLAuthenticationMethodServerTrust 身份验证在我的模拟器上停止工作 - 但在我的 iOS 8.3 测试设备上仍然有效。除了我不是 Swift 2.0 的旧项目外，它还在工作。

错误：NSURLSession/NSURLConnection HTTP load failed (kCFStreamErrorDomainSSL, -9802)

从 NSURLSession 检索到的错误：

Error Domain=NSURLErrorDomain Code=-1200 "An SSL error has occurred and a secure connection to the server cannot be made." UserInfo=0x7fcf75053070 {NSURLErrorFailingURLPeerTrustErrorKey=<SecTrustRef: 0x7fcf73700d00>, NSLocalizedRecoverySuggestion=Would you like to connect to the server anyway?, _kCFStreamErrorCodeKey=-9802, NSUnderlyingError=0x7fcf735284b0 "The operation couldn’t be completed. (kCFErrorDomainCFNetwork error -1200.)", NSLocalizedDescription=An SSL error has occurred and a secure connection to the server cannot be made., NSErrorFailingURLKey=https://mywebapi/dosomething, NSErrorFailingURLStringKey=https://mywebapi/dosomething, _kCFStreamErrorDomainKey=3} [GetOneTimeTokenController.swift:76]

我仍然以 iOS 8.0 为目标进行部署。

这是我处理身份验证挑战的方式（使用自签名证书）：

if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodClientCertificate {

        let urlCredential:NSURLCredential = NSURLCredential(
            identity: identityAndTrust.identityRef,
            certificates: identityAndTrust.certArray as [AnyObject],
            persistence: NSURLCredentialPersistence.ForSession);

        completionHandler(NSURLSessionAuthChallengeDisposition.UseCredential, urlCredential);

    } else if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust {

        completionHandler(NSURLSessionAuthChallengeDisposition.UseCredential, NSURLCredential(trust: challenge.protectionSpace.serverTrust!));

    } else {

        challenge.sender?.continueWithoutCredentialForAuthenticationChallenge(challenge)
        Logger.sharedInstance.logMessage("Unexpected Authentication Challange", .Error);

    }

Answer 1

那么您的模拟器很可能正在运行 iOS 9。在 iOS 9 中，强制执行 TLS 1.2。如果您不使用它，您的请求将失败。

查看this post 了解更多信息。

您可以通过将其放入您的 Info.plist 来绕过它：

<key>NSAppTransportSecurity</key>
<dict>
  <!--Include to allow all connections (DANGER)-->
  <key>NSAllowsArbitraryLoads</key>
      <true/>
</dict>

但这只是一种临时解决方法，直到您可以实施 TLS 1.2。

Answer 2

您没有绕过 TLS 层。请在下面找到使用自签名证书对我有用的答案。

以下是适用于自签名 SSL 证书的代码更改

  func URLSession(session: NSURLSession, didReceiveChallenge challenge: NSURLAuthenticationChallenge, completionHandler: (NSURLSessionAuthChallengeDisposition, NSURLCredential?) -> Void) {

    if challenge.protectionSpace.authenticationMethod == (NSURLAuthenticationMethodServerTrust) {


    let serverTrust:SecTrustRef = challenge.protectionSpace.serverTrust!
    let certificate: SecCertificateRef = SecTrustGetCertificateAtIndex(serverTrust, 0)!
    let remoteCertificateData = CFBridgingRetain(SecCertificateCopyData(certificate))!
    let cerPath: String = NSBundle.mainBundle().pathForResource("xyz.com", ofType: "cer")!
    let localCertificateData = NSData(contentsOfFile:cerPath)!


        if (remoteCertificateData.isEqualToData(localCertificateData) == true) {
            let credential:NSURLCredential = NSURLCredential(forTrust: serverTrust)

            challenge.sender?.useCredential(credential, forAuthenticationChallenge: challenge)


            completionHandler(NSURLSessionAuthChallengeDisposition.UseCredential, NSURLCredential(forTrust: challenge.protectionSpace.serverTrust!))

        } else {

            completionHandler(NSURLSessionAuthChallengeDisposition.CancelAuthenticationChallenge, nil)
        }
    }
    else if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodClientCertificate
    {

        let path: String = NSBundle.mainBundle().pathForResource("client", ofType: "p12")!
        let PKCS12Data = NSData(contentsOfFile:path)!


        let identityAndTrust:IdentityAndTrust = self.extractIdentity(PKCS12Data);



            let urlCredential:NSURLCredential = NSURLCredential(
                identity: identityAndTrust.identityRef,
                certificates: identityAndTrust.certArray as? [AnyObject],
                persistence: NSURLCredentialPersistence.ForSession);

            completionHandler(NSURLSessionAuthChallengeDisposition.UseCredential, urlCredential);




    }
    else
    {
        completionHandler(NSURLSessionAuthChallengeDisposition.CancelAuthenticationChallenge, nil);
    }
}

 struct IdentityAndTrust {

    var identityRef:SecIdentityRef
    var trust:SecTrustRef
    var certArray:AnyObject
}

func extractIdentity(certData:NSData) -> IdentityAndTrust {
    var identityAndTrust:IdentityAndTrust!
    var securityError:OSStatus = errSecSuccess

    let path: String = NSBundle.mainBundle().pathForResource("client", ofType: "p12")!
    let PKCS12Data = NSData(contentsOfFile:path)!
    let key : NSString = kSecImportExportPassphrase as NSString
    let options : NSDictionary = [key : "xyz"]
    //create variable for holding security information
    //var privateKeyRef: SecKeyRef? = nil

    var items : CFArray?

     securityError = SecPKCS12Import(PKCS12Data, options, &items)

    if securityError == errSecSuccess {
        let certItems:CFArray = items as CFArray!;
        let certItemsArray:Array = certItems as Array
        let dict:AnyObject? = certItemsArray.first;
        if let certEntry:Dictionary = dict as? Dictionary<String, AnyObject> {

            // grab the identity
            let identityPointer:AnyObject? = certEntry["identity"];
            let secIdentityRef:SecIdentityRef = identityPointer as! SecIdentityRef!;
            print("\(identityPointer)  :::: \(secIdentityRef)")
            // grab the trust
            let trustPointer:AnyObject? = certEntry["trust"];
            let trustRef:SecTrustRef = trustPointer as! SecTrustRef;
            print("\(trustPointer)  :::: \(trustRef)")
            // grab the cert
            let chainPointer:AnyObject? = certEntry["chain"];
            identityAndTrust = IdentityAndTrust(identityRef: secIdentityRef, trust: trustRef, certArray:  chainPointer!);
        }
    }
    return identityAndTrust;
}

在 info.plist 文件中所做的更改

     <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>NSExceptionDomains</key>
    <dict>
        <key>amazonaws.com.cn</key>
        <dict>
            <key>NSIncludesSubdomains</key>
            <true/>
            <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>
            <false/>
            <key>NSThirdPartyExceptionMinimumTLSVersion</key>
            <string>TLSv1.0</string>
        </dict>
        <key>amazonaws.com</key>
        <dict>
            <key>NSIncludesSubdomains</key>
            <true/>
            <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>
            <false/>
            <key>NSThirdPartyExceptionMinimumTLSVersion</key>
            <string>TLSv1.0</string>
        </dict>
        <key>xyz.com</key>
        <dict>
            <key>NSExceptionAllowsInsecureHTTPLoads</key>
            <true/>
            <key>NSTemporaryExceptionMinimumTLSVersion</key>
            <string>TLSv1.2</string>
            <key>NSRequiresCertificateTransparency</key>
            <false/>
            <key>NSIncludesSubdomains</key>
            <true/>
        </dict>
    </dict>
    <key>NSAllowsArbitraryLoads</key>
    <false/>
</dict>
</plist>

Answer 3

我在 iOS9 和 xcode 7 上遇到了同样的问题只需添加：

<key>NSAppTransportSecurity</key> 
<dict> 
    <key>NSAllowsArbitraryLoads</key> 
    <true/> 
</dict> 

到 plist 文件。它正在工作，但在您可以实施 TLS 1.2 之前，这是一个临时解决方法。