Swift中的iOS SSL连接

我正在尝试从我的iOS应用程序到我的后端服务器(Node.js)建立一个简单的套接字连接(无HTTP).已使用我自己创建的自定义CA创建并签署了服务器证书.我相信,为了让iOS信任我的服务器,我必须以某种方式将这个自定义CA证书添加到可信证书列表中,这些证书用于确定Java / Android中的TrustStore如何工作的信任类型.

我尝试使用下面的代码进行连接,但没有错误,但write()函数似乎没有成功.

主视图控制器：

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view,typically from a nib.

    let api: APIClient = APIClient()

    api.initialiseSSL("10.13.37.200",port: 8080)

    api.write("Hello")

    api.deinitialise()

    print("Done")
}

APIClient类

class APIClient: NSObject,NSStreamDelegate {

var readStream: Unmanaged<CFReadStreamRef>?
var writeStream: Unmanaged<CFWriteStreamRef>?

var inputStream: NSInputStream?
var outputStream: NSOutputStream?

func initialiseSSL(host: String,port: UInt32) {
    CFStreamCreatePairWithSocketToHost(kCFAllocatorDefault,host,port,&readStream,&writeStream)

    inputStream = readStream!.takeRetainedValue()
    outputStream = writeStream!.takeRetainedValue()

    inputStream?.delegate = self
    outputStream?.delegate = self

    inputStream!.scheduleInRunLoop(NSRunLoop.currentRunLoop(),forMode: NSDefaultRunLoopMode)
    outputStream!.scheduleInRunLoop(NSRunLoop.currentRunLoop(),forMode: NSDefaultRunLoopMode)

    let cert: SecCertificateRef? = CreateCertificateFromFile("ca",ext: "der")

    if cert != nil {
        print("GOT CERTIFICATE")
    }

    let certs: NSArray = NSArray(objects: cert!)

    let sslSettings = [
        NSString(format: kCFStreamSSLLevel): kCFStreamSocketSecurityLevelNegotiatedSSL,NSString(format: kCFStreamSSLValidatesCertificateChain): kCFBooleanFalse,NSString(format: kCFStreamSSLPeerName): kCFNull,NSString(format: kCFStreamSSLCertificates): certs,NSString(format: kCFStreamSSLIsServer): kCFBooleanFalse
    ]

    CFReadStreamSetProperty(inputStream,kCFStreamPropertySSLSettings,sslSettings)
    CFWriteStreamSetProperty(outputStream,sslSettings)

    inputStream!.open()
    outputStream!.open()
}

func write(text: String) {
    let data = [UInt8](text.utf8)

    outputStream?.write(data,maxLength: data.count)
}

func CreateCertificateFromFile(filename: String,ext: String) -> SecCertificateRef? {
    var cert: SecCertificateRef!

    if let path = NSBundle.mainBundle().pathForResource(filename,ofType: ext) {

        let data = NSData(contentsOfFile: path)!

        cert = SecCertificateCreateWithData(kCFAllocatorDefault,data)!
    }
    else {

    }

    return cert
}

func deinitialise() {
    inputStream?.close()
    outputStream?.close()
}

}

我理解SSL / TLS是如何工作的,因为我在同一个应用程序的Android版本中完成了这一切.我只是对SSL的iOS实现感到困惑.

我来自Java背景,已经解决了这个问题3周.任何帮助,将不胜感激.

喜欢Swift代码中的答案,而不是目标C,但如果你只有Obj C那也可以:)

好吧,我在这个问题上花了8个星期:(但我终于设法组建了一个有效的解决方案.我必须说iOS上的SSL / TLS是一个笑话.Java Android上的Java让它死了.这是完全荒谬的,为了评估自签名证书的信任,您必须完全禁用证书链验证并自行完成.完全荒谬.无论如何,这是使用自签名服务器证书连接到远程套接字服务器(无HTTP)的完全可用的解决方案.编辑这个答案以提供更好的答案,因为我还没有更改添加发送和接收数据的代码:)

//  SecureSocket
//
//  Created by snapper26 on 2/9/16.
//  Copyright © 2016 snapper26. All rights reserved.
//
import Foundation

class ProXimityAPIClient: NSObject,StreamDelegate {

    // Input and output streams for socket
    var inputStream: InputStream?
    var outputStream: OutputStream?

    // Secondary delegate reference to prevent ARC deallocating the NSStreamDelegate
    var inputDelegate: StreamDelegate?
    var outputDelegate: StreamDelegate?

    // Add a trusted root CA to out SecTrust object
    func addAnchorToTrust(trust: SecTrust,certificate: SecCertificate) -> SecTrust {
        let array: NSMutableArray = NSMutableArray()

        array.add(certificate)

        SecTrustSetAnchorCertificates(trust,array)

        return trust
    }

    // Create a SecCertificate object from a DER formatted certificate file
    func createCertificateFromFile(filename: String,ext: String) -> SecCertificate {
        let rootCertPath = Bundle.main.path(forResource:filename,ofType: ext)

        let rootCertData = NSData(contentsOfFile: rootCertPath!)

        return SecCertificateCreateWithData(kCFAllocatorDefault,rootCertData!)!
    }

    // Connect to remote host/server
    func connect(host: String,port: Int) {
        // Specify host and port number. Get reference to newly created socket streams both in and out
        Stream.getStreamsToHost(withName:host,port: port,inputStream: &inputStream,outputStream: &outputStream)

        // Create strong delegate reference to stop ARC deallocating the object
        inputDelegate = self
        outputDelegate = self

        // Now that we have a strong reference,assign the object to the stream delegates
        inputStream!.delegate = inputDelegate
        outputStream!.delegate = outputDelegate

        // This doesn't work because of arc memory management. Thats why another strong reference above is needed.
        //inputStream!.delegate = self
        //outputStream!.delegate = self

        // Schedule our run loops. This is needed so that we can receive StreamEvents
        inputStream!.schedule(in:RunLoop.main,forMode: RunLoopMode.defaultRunLoopMode)
        outputStream!.schedule(in:RunLoop.main,forMode: RunLoopMode.defaultRunLoopMode)

        // Enable SSL/TLS on the streams
        inputStream!.setProperty(kCFStreamSocketSecurityLevelNegotiatedSSL,forKey:  Stream.PropertyKey.socketSecurityLevelKey)
        outputStream!.setProperty(kCFStreamSocketSecurityLevelNegotiatedSSL,forKey: Stream.PropertyKey.socketSecurityLevelKey)

        // Defin custom SSL/TLS settings
        let sslSettings : [NSString: Any] = [
            // NSStream automatically sets up the socket,the streams and creates a trust object and evaulates it before you even get a chance to check the trust yourself. Only proper SSL certificates will work with this method. If you have a self signed certificate like I do,you need to disable the trust check here and evaulate the trust against your custom root CA yourself.
            NSString(format: kCFStreamSSLValidatesCertificateChain): kCFBooleanFalse,//
            NSString(format: kCFStreamSSLPeerName): kCFNull,// We are an SSL/TLS client,not a server
            NSString(format: kCFStreamSSLIsServer): kCFBooleanFalse
        ]

        // Set the SSL/TLS settingson the streams
        inputStream!.setProperty(sslSettings,forKey:  kCFStreamPropertySSLSettings as Stream.PropertyKey)
        outputStream!.setProperty(sslSettings,forKey: kCFStreamPropertySSLSettings as Stream.PropertyKey)

        // Open the streams
        inputStream!.open()
        outputStream!.open()
    }

    // This is where we get all our events (haven't finished writing this class)
   func stream(_ aStream: Stream,handle eventCode: Stream.Event) {
        switch eventCode {
        case Stream.Event.endEncountered:
            print("End Encountered")
            break
        case Stream.Event.openCompleted:
            print("Open Completed")
            break
        case Stream.Event.hasSpaceAvailable:
            print("Has Space Available")

            // If you try and obtain the trust object (aka kCFStreamPropertySSLPeerTrust) before the stream is available for writing I found that the oject is always nil!
            var sslTrustInput: SecTrust? =  inputStream! .property(forKey:kCFStreamPropertySSLPeerTrust as Stream.PropertyKey) as! SecTrust?
            var sslTrustOutput: SecTrust? = outputStream!.property(forKey:kCFStreamPropertySSLPeerTrust as Stream.PropertyKey) as! SecTrust?

            if (sslTrustInput == nil) {
                print("INPUT TRUST NIL")
            }
            else {
                print("INPUT TRUST NOT NIL")
            }

            if (sslTrustOutput == nil) {
                print("OUTPUT TRUST NIL")
            }
            else {
                print("OUTPUT TRUST NOT NIL")
            }

            // Get our certificate reference. Make sure to add your root certificate file into your project.
            let rootCert: SecCertificate? = createCertificateFromFile(filename: "ca",ext: "der")

            // TODO: Don't want to keep adding the certificate every time???
            // Make sure to add your trusted root CA to the list of trusted anchors otherwise trust evaulation will fail
            sslTrustInput  = addAnchorToTrust(trust: sslTrustInput!,certificate: rootCert!)
            sslTrustOutput = addAnchorToTrust(trust: sslTrustOutput!,certificate: rootCert!)

            // convert kSecTrustResultUnspecified type to SecTrustResultType for comparison
            var result: SecTrustResultType = SecTrustResultType.unspecified

            // This is it! Evaulate the trust.
            let error: OSStatus = SecTrustEvaluate(sslTrustInput!,&result)

            // An error occured evaluating the trust check the OSStatus codes for Apple at osstatus.com
            if (error != noErr) {
                print("Evaluation Failed")
            }

            if (result != SecTrustResultType.proceed && result != SecTrustResultType.unspecified) {
                // Trust failed. This will happen if you faile to add the trusted anchor as mentioned above
                print("Peer is not trusted :(")
            }
            else {
                // Peer certificate is trusted. Now we can send data. Woohoo!
                print("Peer is trusted :)")
            }

            break
        case Stream.Event.hasBytesAvailable:
            print("Has Bytes Available")
            break
        case Stream.Event.errorOccurred:
            print("Error Occured")
            break
        default:
            print("Default")
            break
        }
    }
}