LocalCertificateSelectionCallback 代理人

定義

選取用於驗證的本機 Secure Sockets Layer (SSL) 憑證。Selects the local Secure Sockets Layer (SSL) certificate used for authentication.

public delegate System::Security::Cryptography::X509Certificates::X509Certificate ^ LocalCertificateSelectionCallback(System::Object ^ sender, System::String ^ targetHost, X509CertificateCollection ^ localCertificates, X509Certificate ^ remoteCertificate, cli::array <System::String ^> ^ acceptableIssuers);
public delegate System.Security.Cryptography.X509Certificates.X509Certificate LocalCertificateSelectionCallback(object sender, string targetHost, X509CertificateCollection localCertificates, X509Certificate? remoteCertificate, string[] acceptableIssuers);
public delegate System.Security.Cryptography.X509Certificates.X509Certificate LocalCertificateSelectionCallback(object sender, string targetHost, X509CertificateCollection localCertificates, X509Certificate remoteCertificate, string[] acceptableIssuers);
type LocalCertificateSelectionCallback = delegate of obj * string * X509CertificateCollection * X509Certificate * string[] -> X509Certificate
Public Delegate Function LocalCertificateSelectionCallback(sender As Object, targetHost As String, localCertificates As X509CertificateCollection, remoteCertificate As X509Certificate, acceptableIssuers As String()) As X509Certificate 

參數

sender
Object

物件,包含這個驗證的狀態資訊。An object that contains state information for this validation.

targetHost
String

由用戶端指定的主機伺服器。The host server specified by the client.

localCertificates
X509CertificateCollection

X509CertificateCollection,包含本機憑證。An X509CertificateCollection containing local certificates.

remoteCertificate
X509Certificate

憑證,用於驗證遠端群體。The certificate used to authenticate the remote party.

acceptableIssuers
String[]

遠端群體可接受之憑證簽發者的 String 陣列。A String array of certificate issuers acceptable to the remote party.

傳回值

X509Certificate

X509Certificate,用於建立 SSL 連線。An X509Certificate used for establishing an SSL connection.

範例

下列程式碼範例示範這個委派的方法執行。The following code example demonstrates a method implementation for this delegate.

static X509Certificate^ SelectLocalCertificate(
        Object^ sender, 
        String^ targetHost, 
        X509CertificateCollection^ localCertificates, 
        X509Certificate^ remoteCertificate, 
        array<String^>^ acceptableIssuers
)
{	
    Console::WriteLine("Client is selecting a local certificate.");
    if (acceptableIssuers != nullptr && 
            acceptableIssuers->Length > 0 &&
            localCertificates != nullptr &&
            localCertificates->Count > 0)
    {
        // Use the first certificate that is from an acceptable issuer.
        IEnumerator^ myEnum1 = localCertificates->GetEnumerator();
        while ( myEnum1->MoveNext() )
        {
            X509Certificate^ certificate = safe_cast<X509Certificate^>(myEnum1->Current);
            String^ issuer = certificate->Issuer;
            if ( Array::IndexOf( acceptableIssuers, issuer ) != -1 )
                return certificate;
        }
    }
    if (localCertificates != nullptr &&
            localCertificates->Count > 0)
        return localCertificates[0];
            
    return nullptr;
 }

public static X509Certificate SelectLocalCertificate(
    object sender,
    string targetHost,
    X509CertificateCollection localCertificates,
    X509Certificate remoteCertificate,
    string[] acceptableIssuers)
{	
    Console.WriteLine("Client is selecting a local certificate.");
    if (acceptableIssuers != null &&
        acceptableIssuers.Length > 0 &&
        localCertificates != null &&
        localCertificates.Count > 0)
    {
        // Use the first certificate that is from an acceptable issuer.
        foreach (X509Certificate certificate in localCertificates)
        {
            string issuer = certificate.Issuer;
            if (Array.IndexOf(acceptableIssuers, issuer) != -1)
                return certificate;
        }
    }
    if (localCertificates != null &&
        localCertificates.Count > 0)
        return localCertificates[0];

    return null;
}

下列程式碼範例將示範如何建立這個委派的實例。The following code example demonstrates creating an instance of this delegate.

// Server name must match the host name and the name on the host's certificate. 
serverName = args[ 1 ];

// Create a TCP/IP client socket.
TcpClient^ client = gcnew TcpClient( serverName,80 );
Console::WriteLine( L"Client connected." );

// Create an SSL stream that will close the client's stream.
SslStream^ sslStream = gcnew SslStream( 
    client->GetStream(),
    false,
    gcnew RemoteCertificateValidationCallback( ValidateServerCertificate ),
    gcnew LocalCertificateSelectionCallback( SelectLocalCertificate ) );

// Server name must match the host name and the name on the host's certificate.
serverName = args[0];
// Create a TCP/IP client socket.
TcpClient client = new TcpClient(serverName,80);
Console.WriteLine("Client connected.");
// Create an SSL stream that will close the client's stream.
SslStream sslStream = new SslStream(
    client.GetStream(),
    false,
    new RemoteCertificateValidationCallback (ValidateServerCertificate),
    new LocalCertificateSelectionCallback(SelectLocalCertificate)
    );

備註

這個委派會用來建立類別的實例 SslStreamThis delegate is used to construct instances of the SslStream class. SslStream類別是用來協助保護用戶端與伺服器之間交換的資訊。The SslStream class is used to help secure information exchanged between a client and server. 用戶端和伺服器使用此委派來選取要用於驗證的憑證。The client and server use this delegate to select a certificate to be used for authentication.

擴充方法

GetMethodInfo(Delegate)

取得表示特定委派所代表之方法的物件。Gets an object that represents the method represented by the specified delegate.

適用於

另請參閱