Ios 如何向NWProtocolTLS.Options（）添加自定义字符串

Multipeer Connectivity framework具有一个参数，用于添加peerID，例如设备名称：

var peerID: MCPeerID!
var mcSession: MCSession!

peerID = MCPeerID(displayName: UIDevice.current.name)
mcSession = MCSession(peer: peerID, securityIdentity: nil, encryptionPreference: .required)

如何将相同的内容添加到NWProtocolTLS.Options（）

我看了看苹果公司在其发展过程中的做法。他们使用安全密码，但我不需要任何复杂的东西，我只需要设备名或uid

使用

苹果的代码：

// Create TLS options using a passcode to derive a pre-shared key.
func tlsOptions(passcode: String) -> NWProtocolTLS.Options {
    let tlsOptions = NWProtocolTLS.Options()

    let authenticationKey = SymmetricKey(data: passcode.data(using: .utf8)!)
    var authenticationCode = HMAC<SHA256>.authenticationCode(for: "TicTacToe".data(using: .utf8)!, using: authenticationKey)

    let authenticationDispatchData = withUnsafeBytes(of: &authenticationCode) { (ptr: UnsafeRawBufferPointer) in
        DispatchData(bytes: ptr)
    }

    sec_protocol_options_add_pre_shared_key(tlsOptions.securityProtocolOptions,
                                            authenticationDispatchData as __DispatchData,
                                            stringToDispatchData("TicTacToe")! as __DispatchData)
    sec_protocol_options_append_tls_ciphersuite(tlsOptions.securityProtocolOptions,
                                                tls_ciphersuite_t(rawValue: TLS_PSK_WITH_AES_128_GCM_SHA256)!)
    return tlsOptions
}

// Create a utility function to encode strings as pre-shared key data.
func stringToDispatchData(_ string: String) -> DispatchData? {
    guard let stringData = string.data(using: .unicode) else {
        return nil
    }
    let dispatchData = withUnsafeBytes(of: stringData) { (ptr: UnsafeRawBufferPointer) in
        DispatchData(bytes: UnsafeRawBufferPointer(start: ptr.baseAddress, count: stringData.count))
    }
    return dispatchData
}

//使用密码派生预共享密钥创建TLS选项。
func tlsOptions（密码：String）->NWProtocolTLS.Options{
设tlsOptions=NWProtocolTLS.Options（）
让authenticationKey=SymmetricKey（数据：passcode.data（使用：.utf8）！）
var authenticationCode=HMAC.authenticationCode（用于“TicTacToe”.data（使用：.utf8）！，使用：authenticationKey）
让authenticationDispatchData=withUnsafeBytes（of:&authenticationCode）{（ptr:UnsafeRawBufferPointer）位于
DispatchData（字节：ptr）
}
sec协议选项添加预共享密钥（tlsOptions.securityProtocolOptions、，
身份验证DispatchData为uu DispatchData，
stringToDispatchData（“TicTacToe”）！作为DispatchData）
sec_协议_选项_附加_tls_密码套件（tlsOptions.securityProtocolOptions，
tls_密码套件（原始值：tls_PSK_，带AES_128_GCM_SHA256）！）
返回时间间隔
}
//创建一个实用函数，将字符串编码为预共享密钥数据。
func stringToDispatchData（\uString:string）->DispatchData？{
guard let stringData=string.data（使用：.unicode）else{
归零
}
让dispatchData=withUnsafeBytes（of:stringData）{（ptr:UnsafeRawBufferPointer）在
DispatchData（字节：UnsafeRawBufferPointer（开始：ptr.baseAddress，计数：stringData.count））
}
返回调度数据
}

// Create TLS options using a passcode to derive a pre-shared key.
func tlsOptions(passcode: String) -> NWProtocolTLS.Options {
    let tlsOptions = NWProtocolTLS.Options()

    let authenticationKey = SymmetricKey(data: passcode.data(using: .utf8)!)
    var authenticationCode = HMAC<SHA256>.authenticationCode(for: "TicTacToe".data(using: .utf8)!, using: authenticationKey)

    let authenticationDispatchData = withUnsafeBytes(of: &authenticationCode) { (ptr: UnsafeRawBufferPointer) in
        DispatchData(bytes: ptr)
    }

    sec_protocol_options_add_pre_shared_key(tlsOptions.securityProtocolOptions,
                                            authenticationDispatchData as __DispatchData,
                                            stringToDispatchData("TicTacToe")! as __DispatchData)
    sec_protocol_options_append_tls_ciphersuite(tlsOptions.securityProtocolOptions,
                                                tls_ciphersuite_t(rawValue: TLS_PSK_WITH_AES_128_GCM_SHA256)!)
    return tlsOptions
}

// Create a utility function to encode strings as pre-shared key data.
func stringToDispatchData(_ string: String) -> DispatchData? {
    guard let stringData = string.data(using: .unicode) else {
        return nil
    }
    let dispatchData = withUnsafeBytes(of: stringData) { (ptr: UnsafeRawBufferPointer) in
        DispatchData(bytes: UnsafeRawBufferPointer(start: ptr.baseAddress, count: stringData.count))
    }
    return dispatchData
}