X509Certificate2 Kelas

Definisi

Ruang nama:

System.Security.Cryptography.X509Certificates

Rakitan:

System.Security.Cryptography.dll

Sumber:

X509Certificate2.cs

Mewakili sertifikat X.509.

public ref class X509Certificate2 : System::Security::Cryptography::X509Certificates::X509Certificate

public class X509Certificate2 : System.Security.Cryptography.X509Certificates.X509Certificate

type X509Certificate2 = class
    inherit X509Certificate

Public Class X509Certificate2
Inherits X509Certificate

Warisan

Object

X509Certificate

X509Certificate2

Contoh

Contoh berikut menunjukkan cara menggunakan X509Certificate2 objek untuk mengenkripsi dan mendekripsi file.

using System;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.IO;
using System.Text;

// To run this sample use the Certificate Creation Tool (Makecert.exe) to generate a test X.509 certificate and
// place it in the local user store.
// To generate an exchange key and make the key exportable run the following command from a Visual Studio command prompt:

//makecert -r -pe -n "CN=CERT_SIGN_TEST_CERT" -b 01/01/2010 -e 01/01/2012 -sky exchange -ss my
namespace X509CertEncrypt
{
    class Program
    {

        // Path variables for source, encryption, and
        // decryption folders. Must end with a backslash.
        private static string encrFolder = @"C:\Encrypt\";
        private static string decrFolder = @"C:\Decrypt\";
        private static string originalFile = "TestData.txt";
        private static string encryptedFile = "TestData.enc";

        static void Main(string[] args)
        {

            // Create an input file with test data.
            StreamWriter sw = File.CreateText(originalFile);
            sw.WriteLine("Test data to be encrypted");
            sw.Close();

            // Get the certificate to use to encrypt the key.
            X509Certificate2 cert = GetCertificateFromStore("CN=CERT_SIGN_TEST_CERT");
            if (cert == null)
            {
                Console.WriteLine("Certificate 'CN=CERT_SIGN_TEST_CERT' not found.");
                Console.ReadLine();
            }

            // Encrypt the file using the public key from the certificate.
            EncryptFile(originalFile, (RSA)cert.PublicKey.Key);

            // Decrypt the file using the private key from the certificate.
            DecryptFile(encryptedFile, cert.GetRSAPrivateKey());

            //Display the original data and the decrypted data.
            Console.WriteLine("Original:   {0}", File.ReadAllText(originalFile));
            Console.WriteLine("Round Trip: {0}", File.ReadAllText(decrFolder + originalFile));
            Console.WriteLine("Press the Enter key to exit.");
            Console.ReadLine();
        }
        private static X509Certificate2 GetCertificateFromStore(string certName)
        {

            // Get the certificate store for the current user.
            X509Store store = new X509Store(StoreLocation.CurrentUser);
            try
            {
                store.Open(OpenFlags.ReadOnly);

                // Place all certificates in an X509Certificate2Collection object.
                X509Certificate2Collection certCollection = store.Certificates;
                // If using a certificate with a trusted root you do not need to FindByTimeValid, instead:
                // currentCerts.Find(X509FindType.FindBySubjectDistinguishedName, certName, true);
                X509Certificate2Collection currentCerts = certCollection.Find(X509FindType.FindByTimeValid, DateTime.Now, false);
                X509Certificate2Collection signingCert = currentCerts.Find(X509FindType.FindBySubjectDistinguishedName, certName, false);
                if (signingCert.Count == 0)
                    return null;
                // Return the first certificate in the collection, has the right name and is current.
                return signingCert[0];
            }
            finally
            {
                store.Close();
            }
        }

        // Encrypt a file using a public key.
        private static void EncryptFile(string inFile, RSA rsaPublicKey)
        {
            using (Aes aes = Aes.Create())
            {
                // Create instance of Aes for
                // symmetric encryption of the data.
                aes.KeySize = 256;
                aes.Mode = CipherMode.CBC;
                using (ICryptoTransform transform = aes.CreateEncryptor())
                {
                    RSAPKCS1KeyExchangeFormatter keyFormatter = new RSAPKCS1KeyExchangeFormatter(rsaPublicKey);
                    byte[] keyEncrypted = keyFormatter.CreateKeyExchange(aes.Key, aes.GetType());

                    // Create byte arrays to contain
                    // the length values of the key and IV.
                    byte[] LenK = new byte[4];
                    byte[] LenIV = new byte[4];

                    int lKey = keyEncrypted.Length;
                    LenK = BitConverter.GetBytes(lKey);
                    int lIV = aes.IV.Length;
                    LenIV = BitConverter.GetBytes(lIV);

                    // Write the following to the FileStream
                    // for the encrypted file (outFs):
                    // - length of the key
                    // - length of the IV
                    // - encrypted key
                    // - the IV
                    // - the encrypted cipher content

                    int startFileName = inFile.LastIndexOf("\\") + 1;
                    // Change the file's extension to ".enc"
                    string outFile = encrFolder + inFile.Substring(startFileName, inFile.LastIndexOf(".") - startFileName) + ".enc";
                    Directory.CreateDirectory(encrFolder);

                    using (FileStream outFs = new FileStream(outFile, FileMode.Create))
                    {

                        outFs.Write(LenK, 0, 4);
                        outFs.Write(LenIV, 0, 4);
                        outFs.Write(keyEncrypted, 0, lKey);
                        outFs.Write(aes.IV, 0, lIV);

                        // Now write the cipher text using
                        // a CryptoStream for encrypting.
                        using (CryptoStream outStreamEncrypted = new CryptoStream(outFs, transform, CryptoStreamMode.Write))
                        {

                            // By encrypting a chunk at
                            // a time, you can save memory
                            // and accommodate large files.
                            int count = 0;

                            // blockSizeBytes can be any arbitrary size.
                            int blockSizeBytes = aes.BlockSize / 8;
                            byte[] data = new byte[blockSizeBytes];
                            int bytesRead = 0;

                            using (FileStream inFs = new FileStream(inFile, FileMode.Open))
                            {
                                do
                                {
                                    count = inFs.Read(data, 0, blockSizeBytes);
                                    outStreamEncrypted.Write(data, 0, count);
                                    bytesRead += count;
                                }
                                while (count > 0);
                                inFs.Close();
                            }
                            outStreamEncrypted.FlushFinalBlock();
                            outStreamEncrypted.Close();
                        }
                        outFs.Close();
                    }
                }
            }
        }


        // Decrypt a file using a private key.
        private static void DecryptFile(string inFile, RSA rsaPrivateKey)
        {

            // Create instance of Aes for
            // symmetric decryption of the data.
            using (Aes aes = Aes.Create())
            {
                aes.KeySize = 256;
                aes.Mode = CipherMode.CBC;

                // Create byte arrays to get the length of
                // the encrypted key and IV.
                // These values were stored as 4 bytes each
                // at the beginning of the encrypted package.
                byte[] LenK = new byte[4];
                byte[] LenIV = new byte[4];

                // Construct the file name for the decrypted file.
                string outFile = decrFolder + inFile.Substring(0, inFile.LastIndexOf(".")) + ".txt";

                // Use FileStream objects to read the encrypted
                // file (inFs) and save the decrypted file (outFs).
                using (FileStream inFs = new FileStream(encrFolder + inFile, FileMode.Open))
                {

                    inFs.Seek(0, SeekOrigin.Begin);
                    inFs.Seek(0, SeekOrigin.Begin);
                    inFs.Read(LenK, 0, 3);
                    inFs.Seek(4, SeekOrigin.Begin);
                    inFs.Read(LenIV, 0, 3);

                    // Convert the lengths to integer values.
                    int lenK = BitConverter.ToInt32(LenK, 0);
                    int lenIV = BitConverter.ToInt32(LenIV, 0);

                    // Determine the start position of
                    // the cipher text (startC)
                    // and its length(lenC).
                    int startC = lenK + lenIV + 8;
                    int lenC = (int)inFs.Length - startC;

                    // Create the byte arrays for
                    // the encrypted Aes key,
                    // the IV, and the cipher text.
                    byte[] KeyEncrypted = new byte[lenK];
                    byte[] IV = new byte[lenIV];

                    // Extract the key and IV
                    // starting from index 8
                    // after the length values.
                    inFs.Seek(8, SeekOrigin.Begin);
                    inFs.Read(KeyEncrypted, 0, lenK);
                    inFs.Seek(8 + lenK, SeekOrigin.Begin);
                    inFs.Read(IV, 0, lenIV);
                    Directory.CreateDirectory(decrFolder);
                    // Use RSA
                    // to decrypt the Aes key.
                    byte[] KeyDecrypted = rsaPrivateKey.Decrypt(KeyEncrypted, RSAEncryptionPadding.Pkcs1);

                    // Decrypt the key.
                    using (ICryptoTransform transform = aes.CreateDecryptor(KeyDecrypted, IV))
                    {

                        // Decrypt the cipher text from
                        // from the FileSteam of the encrypted
                        // file (inFs) into the FileStream
                        // for the decrypted file (outFs).
                        using (FileStream outFs = new FileStream(outFile, FileMode.Create))
                        {

                            int count = 0;

                            int blockSizeBytes = aes.BlockSize / 8;
                            byte[] data = new byte[blockSizeBytes];

                            // By decrypting a chunk a time,
                            // you can save memory and
                            // accommodate large files.

                            // Start at the beginning
                            // of the cipher text.
                            inFs.Seek(startC, SeekOrigin.Begin);
                            using (CryptoStream outStreamDecrypted = new CryptoStream(outFs, transform, CryptoStreamMode.Write))
                            {
                                do
                                {
                                    count = inFs.Read(data, 0, blockSizeBytes);
                                    outStreamDecrypted.Write(data, 0, count);
                                }
                                while (count > 0);

                                outStreamDecrypted.FlushFinalBlock();
                                outStreamDecrypted.Close();
                            }
                            outFs.Close();
                        }
                        inFs.Close();
                    }
                }
            }
        }
    }
}

Imports System.Security.Cryptography
Imports System.Security.Cryptography.X509Certificates
Imports System.IO
Imports System.Text


' To run this sample use the Certificate Creation Tool (Makecert.exe) to generate a test X.509 certificate and
' place it in the local user store.
' To generate an exchange key and make the key exportable run the following command from a Visual Studio command prompt:
'makecert -r -pe -n "CN=CERT_SIGN_TEST_CERT" -b 01/01/2010 -e 01/01/2012 -sky exchange -ss my

Class Program

    ' Path variables for source, encryption, and
    ' decryption folders. Must end with a backslash.
    Private Shared encrFolder As String = "C:\Encrypt\"
    Private Shared decrFolder As String = "C:\Decrypt\"
    Private Shared originalFile As String = "TestData.txt"
    Private Shared encryptedFile As String = "TestData.enc"


    Shared Sub Main(ByVal args() As String)

        ' Create an input file with test data.
        Dim sw As StreamWriter = File.CreateText(originalFile)
        sw.WriteLine("Test data to be encrypted")
        sw.Close()

        ' Get the certificate to use to encrypt the key.
        Dim cert As X509Certificate2 = GetCertificateFromStore("CN=CERT_SIGN_TEST_CERT")
        If cert Is Nothing Then
            Console.WriteLine("Certificate 'CN=CERT_SIGN_TEST_CERT' not found.")
            Console.ReadLine()
        End If


        ' Encrypt the file using the public key from the certificate.
        EncryptFile(originalFile, CType(cert.PublicKey.Key, RSA))

        ' Decrypt the file using the private key from the certificate.
        DecryptFile(encryptedFile, cert.GetRSAPrivateKey())

        'Display the original data and the decrypted data.
        Console.WriteLine("Original:   {0}", File.ReadAllText(originalFile))
        Console.WriteLine("Round Trip: {0}", File.ReadAllText(decrFolder + originalFile))
        Console.WriteLine("Press the Enter key to exit.")
        Console.ReadLine()

    End Sub

    Private Shared Function GetCertificateFromStore(ByVal certName As String) As X509Certificate2
        ' Get the certificate store for the current user.
        Dim store As New X509Store(StoreLocation.CurrentUser)
        Try
            store.Open(OpenFlags.ReadOnly)

            ' Place all certificates in an X509Certificate2Collection object.
            Dim certCollection As X509Certificate2Collection = store.Certificates
            ' If using a certificate with a trusted root you do not need to FindByTimeValid, instead use:
            ' currentCerts.Find(X509FindType.FindBySubjectDistinguishedName, certName, true);
            Dim currentCerts As X509Certificate2Collection = certCollection.Find(X509FindType.FindByTimeValid, DateTime.Now, False)
            Dim signingCert As X509Certificate2Collection = currentCerts.Find(X509FindType.FindBySubjectDistinguishedName, certName, False)
            If signingCert.Count = 0 Then
                Return Nothing
            End If ' Return the first certificate in the collection, has the right name and is current.
            Return signingCert(0)
        Finally
            store.Close()
        End Try


    End Function 'GetCertificateFromStore

    ' Encrypt a file using a public key.
    Private Shared Sub EncryptFile(ByVal inFile As String, ByVal rsaPublicKey As RSA)
        Dim aes As Aes = Aes.Create()
        Try
            ' Create instance of Aes for
            ' symmetric encryption of the data.
            aes.KeySize = 256
            aes.Mode = CipherMode.CBC
            Dim transform As ICryptoTransform = aes.CreateEncryptor()
            Try
                Dim keyFormatter As New RSAPKCS1KeyExchangeFormatter(rsaPublicKey)
                Dim keyEncrypted As Byte() = keyFormatter.CreateKeyExchange(aes.Key, aes.GetType())

                ' Create byte arrays to contain
                ' the length values of the key and IV.
                Dim LenK(3) As Byte
                Dim LenIV(3) As Byte

                Dim lKey As Integer = keyEncrypted.Length
                LenK = BitConverter.GetBytes(lKey)
                Dim lIV As Integer = aes.IV.Length
                LenIV = BitConverter.GetBytes(lIV)

                ' Write the following to the FileStream
                ' for the encrypted file (outFs):
                ' - length of the key
                ' - length of the IV
                ' - encrypted key
                ' - the IV
                ' - the encrypted cipher content
                Dim startFileName As Integer = inFile.LastIndexOf("\") + 1
                ' Change the file's extension to ".enc"
                Dim outFile As String = encrFolder + inFile.Substring(startFileName, inFile.LastIndexOf(".") - startFileName) + ".enc"
                Directory.CreateDirectory(encrFolder)

                Dim outFs As New FileStream(outFile, FileMode.Create)
                Try

                    outFs.Write(LenK, 0, 4)
                    outFs.Write(LenIV, 0, 4)
                    outFs.Write(keyEncrypted, 0, lKey)
                    outFs.Write(aes.IV, 0, lIV)

                    ' Now write the cipher text using
                    ' a CryptoStream for encrypting.
                    Dim outStreamEncrypted As New CryptoStream(outFs, transform, CryptoStreamMode.Write)
                    Try

                        ' By encrypting a chunk at
                        ' a time, you can save memory
                        ' and accommodate large files.
                        Dim count As Integer = 0

                        ' blockSizeBytes can be any arbitrary size.
                        Dim blockSizeBytes As Integer = aes.BlockSize / 8
                        Dim data(blockSizeBytes) As Byte
                        Dim bytesRead As Integer = 0

                        Dim inFs As New FileStream(inFile, FileMode.Open)
                        Try
                            Do
                                count = inFs.Read(data, 0, blockSizeBytes)
                                outStreamEncrypted.Write(data, 0, count)
                                bytesRead += count
                            Loop While count > 0
                            inFs.Close()
                        Finally
                            inFs.Dispose()
                        End Try
                        outStreamEncrypted.FlushFinalBlock()
                        outStreamEncrypted.Close()
                    Finally
                        outStreamEncrypted.Dispose()
                    End Try
                    outFs.Close()
                Finally
                    outFs.Dispose()
                End Try
            Finally
                transform.Dispose()
            End Try
        Finally
            aes.Dispose()
        End Try

    End Sub


    ' Decrypt a file using a private key.
    Private Shared Sub DecryptFile(ByVal inFile As String, ByVal rsaPrivateKey As RSA)

        ' Create instance of Aes for
        ' symmetric decryption of the data.
        Dim aes As Aes = Aes.Create()
        Try
            aes.KeySize = 256
            aes.Mode = CipherMode.CBC

            ' Create byte arrays to get the length of
            ' the encrypted key and IV.
            ' These values were stored as 4 bytes each
            ' at the beginning of the encrypted package.
            Dim LenK() As Byte = New Byte(4 - 1) {}
            Dim LenIV() As Byte = New Byte(4 - 1) {}

            ' Consruct the file name for the decrypted file.
            Dim outFile As String = decrFolder + inFile.Substring(0, inFile.LastIndexOf(".")) + ".txt"

            ' Use FileStream objects to read the encrypted
            ' file (inFs) and save the decrypted file (outFs).
            Dim inFs As New FileStream(encrFolder + inFile, FileMode.Open)
            Try

                inFs.Seek(0, SeekOrigin.Begin)
                inFs.Seek(0, SeekOrigin.Begin)
                inFs.Read(LenK, 0, 3)
                inFs.Seek(4, SeekOrigin.Begin)
                inFs.Read(LenIV, 0, 3)

                ' Convert the lengths to integer values.
                Dim lengthK As Integer = BitConverter.ToInt32(LenK, 0)
                Dim lengthIV As Integer = BitConverter.ToInt32(LenIV, 0)

                ' Determine the start postition of
                ' the cipher text (startC)
                ' and its length(lenC).
                Dim startC As Integer = lengthK + lengthIV + 8
                Dim lenC As Integer = (CType(inFs.Length, Integer) - startC)

                ' Create the byte arrays for
                ' the encrypted AES key,
                ' the IV, and the cipher text.
                Dim KeyEncrypted() As Byte = New Byte(lengthK - 1) {}
                Dim IV() As Byte = New Byte(lengthIV - 1) {}

                ' Extract the key and IV
                ' starting from index 8
                ' after the length values.
                inFs.Seek(8, SeekOrigin.Begin)
                inFs.Read(KeyEncrypted, 0, lengthK)
                inFs.Seek(8 + lengthK, SeekOrigin.Begin)
                inFs.Read(IV, 0, lengthIV)
                Directory.CreateDirectory(decrFolder)
                ' Use RSA
                ' to decrypt the AES key.
                Dim KeyDecrypted As Byte() = rsaPrivateKey.Decrypt(KeyEncrypted, RSAEncryptionPadding.Pkcs1)

                ' Decrypt the key.
                Dim transform As ICryptoTransform = aes.CreateDecryptor(KeyDecrypted, IV)
                ' Decrypt the cipher text from
                ' from the FileSteam of the encrypted
                ' file (inFs) into the FileStream
                ' for the decrypted file (outFs).
                Dim outFs As New FileStream(outFile, FileMode.Create)
                Try
                    ' Decrypt the cipher text from
                    ' from the FileSteam of the encrypted
                    ' file (inFs) into the FileStream
                    ' for the decrypted file (outFs).

                    Dim count As Integer = 0

                    Dim blockSizeBytes As Integer = aes.BlockSize / 8
                    Dim data(blockSizeBytes) As Byte

                    ' By decrypting a chunk a time,
                    ' you can save memory and
                    ' accommodate large files.
                    ' Start at the beginning
                    ' of the cipher text.
                    inFs.Seek(startC, SeekOrigin.Begin)
                    Dim outStreamDecrypted As New CryptoStream(outFs, transform, CryptoStreamMode.Write)
                    Try
                        Do
                            count = inFs.Read(data, 0, blockSizeBytes)
                            outStreamDecrypted.Write(data, 0, count)
                        Loop While count > 0

                        outStreamDecrypted.FlushFinalBlock()
                        outStreamDecrypted.Close()
                    Finally
                        outStreamDecrypted.Dispose()
                    End Try
                    outFs.Close()
                Finally
                    outFs.Dispose()
                End Try
                inFs.Close()

            Finally
                inFs.Dispose()

            End Try

        Finally
            aes.Dispose()
        End Try


    End Sub
End Class

Contoh berikut membuat executable baris perintah yang mengambil file sertifikat sebagai argumen dan mencetak berbagai properti sertifikat ke konsol.

#using <System.dll>

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Security::Permissions;
using namespace System::IO;
using namespace System::Security::Cryptography::X509Certificates;

//Reads a file.
array<Byte>^ ReadFile( String^ fileName )
{
   FileStream^ f = gcnew FileStream( fileName,FileMode::Open,FileAccess::Read );
   int size = (int)f->Length;
   array<Byte>^data = gcnew array<Byte>(size);
   size = f->Read( data, 0, size );
   f->Close();
   return data;
}

[SecurityPermissionAttribute(SecurityAction::LinkDemand, Unrestricted = true)]
int main()
{
   array<String^>^args = Environment::GetCommandLineArgs();

   //Test for correct number of arguments.
   if ( args->Length < 2 )
   {
      Console::WriteLine( "Usage: CertInfo <filename>" );
      return  -1;
   }

   try
   {
      System::Security::Cryptography::X509Certificates::X509Certificate2 ^ x509 =
            gcnew System::Security::Cryptography::X509Certificates::X509Certificate2;

      //Create X509Certificate2 object from .cer file.
      array<Byte>^rawData = ReadFile( args[ 1 ] );

      x509->Import(rawData);

      //Print to console information contained in the certificate.
      Console::WriteLine( "{0}Subject: {1}{0}", Environment::NewLine, x509->Subject );
      Console::WriteLine( "{0}Issuer: {1}{0}", Environment::NewLine, x509->Issuer );
      Console::WriteLine( "{0}Version: {1}{0}", Environment::NewLine, x509->Version );
      Console::WriteLine( "{0}Valid Date: {1}{0}", Environment::NewLine, x509->NotBefore );
      Console::WriteLine( "{0}Expiry Date: {1}{0}", Environment::NewLine, x509->NotAfter );
      Console::WriteLine( "{0}Thumbprint: {1}{0}", Environment::NewLine, x509->Thumbprint );
      Console::WriteLine( "{0}Serial Number: {1}{0}", Environment::NewLine, x509->SerialNumber );
      Console::WriteLine( "{0}Friendly Name: {1}{0}", Environment::NewLine, x509->PublicKey->Oid->FriendlyName );
      Console::WriteLine( "{0}Public Key Format: {1}{0}", Environment::NewLine, x509->PublicKey->EncodedKeyValue->Format(true) );
      Console::WriteLine( "{0}Raw Data Length: {1}{0}", Environment::NewLine, x509->RawData->Length );
      Console::WriteLine( "{0}Certificate to string: {1}{0}", Environment::NewLine, x509->ToString( true ) );
      Console::WriteLine( "{0}Certificate to XML String: {1}{0}", Environment::NewLine, x509->PublicKey->Key->ToXmlString( false ) );

      //Add the certificate to a X509Store.
      X509Store ^ store = gcnew X509Store;
      store->Open( OpenFlags::MaxAllowed );
      store->Add( x509 );
      store->Close();
   }
   catch ( DirectoryNotFoundException^ )
   {
      Console::WriteLine( "Error: The directory specified could not be found." );
   }
   catch ( IOException^ )
   {
      Console::WriteLine( "Error: A file in the directory could not be accessed." );
   }
   catch ( NullReferenceException^ )
   {
      Console::WriteLine( "File must be a .cer file. Program does not have access to that type of file." );
   }

}

using System;
using System.Security.Cryptography;
using System.Security.Permissions;
using System.IO;
using System.Security.Cryptography.X509Certificates;

class CertInfo
{
    //Reads a file.
    internal static byte[] ReadFile (string fileName)
    {
        FileStream f = new FileStream(fileName, FileMode.Open, FileAccess.Read);
        int size = (int)f.Length;
        byte[] data = new byte[size];
        size = f.Read(data, 0, size);
        f.Close();
        return data;
    }
    //Main method begins here.
    static void Main(string[] args)
    {
        //Test for correct number of arguments.
        if (args.Length < 1)
        {
            Console.WriteLine("Usage: CertInfo <filename>");
            return;
        }
        try
        {
            byte[] rawData = ReadFile(args[0]);
            //Create X509Certificate2 object from .cer file.
            X509Certificate2 x509 = new X509Certificate2(rawData);

            //Print to console information contained in the certificate.
            Console.WriteLine("{0}Subject: {1}{0}", Environment.NewLine, x509.Subject);
            Console.WriteLine("{0}Issuer: {1}{0}", Environment.NewLine, x509.Issuer);
            Console.WriteLine("{0}Version: {1}{0}", Environment.NewLine, x509.Version);
            Console.WriteLine("{0}Valid Date: {1}{0}", Environment.NewLine, x509.NotBefore);
            Console.WriteLine("{0}Expiry Date: {1}{0}", Environment.NewLine, x509.NotAfter);
            Console.WriteLine("{0}Thumbprint: {1}{0}", Environment.NewLine, x509.Thumbprint);
            Console.WriteLine("{0}Serial Number: {1}{0}", Environment.NewLine, x509.SerialNumber);
            Console.WriteLine("{0}Friendly Name: {1}{0}", Environment.NewLine, x509.PublicKey.Oid.FriendlyName);
            Console.WriteLine("{0}Public Key Format: {1}{0}", Environment.NewLine, x509.PublicKey.EncodedKeyValue.Format(true));
            Console.WriteLine("{0}Raw Data Length: {1}{0}", Environment.NewLine, x509.RawData.Length);
            Console.WriteLine("{0}Certificate to string: {1}{0}", Environment.NewLine, x509.ToString(true));
            Console.WriteLine("{0}Certificate to XML String: {1}{0}", Environment.NewLine, x509.PublicKey.Key.ToXmlString(false));

            //Add the certificate to a X509Store.
            X509Store store = new X509Store();
            store.Open(OpenFlags.MaxAllowed);
            store.Add(x509);
            store.Close();
        }
        catch (DirectoryNotFoundException)
        {
               Console.WriteLine("Error: The directory specified could not be found.");
        }
        catch (IOException)
        {
            Console.WriteLine("Error: A file in the directory could not be accessed.");
        }
        catch (NullReferenceException)
        {
            Console.WriteLine("File must be a .cer file. Program does not have access to that type of file.");
        }
    }
}

Imports System.Security.Cryptography
Imports System.Security.Permissions
Imports System.IO
Imports System.Security.Cryptography.X509Certificates

Class CertInfo

    'Reads a file.
    Friend Shared Function ReadFile(ByVal fileName As String) As Byte()
        Dim f As New FileStream(fileName, FileMode.Open, FileAccess.Read)
        Dim size As Integer = Fix(f.Length)
        Dim data(size - 1) As Byte
        size = f.Read(data, 0, size)
        f.Close()
        Return data

    End Function 

    <SecurityPermission(SecurityAction.LinkDemand, Unrestricted:=True)> _
    Shared Sub Main(ByVal args() As String)
        'Test for correct number of arguments.
        If args.Length < 1 Then
            Console.WriteLine("Usage: CertInfo <filename>")
            Return
        End If
        Try
            Dim x509 As New X509Certificate2()
            'Create X509Certificate2 object from .cer file.
            Dim rawData As Byte() = ReadFile(args(0))
            
            x509.Import(rawData)

            'Print to console information contained in the certificate.
            Console.WriteLine("{0}Subject: {1}{0}", Environment.NewLine, x509.Subject)
            Console.WriteLine("{0}Issuer: {1}{0}", Environment.NewLine, x509.Issuer)
            Console.WriteLine("{0}Version: {1}{0}", Environment.NewLine, x509.Version)
            Console.WriteLine("{0}Valid Date: {1}{0}", Environment.NewLine, x509.NotBefore)
            Console.WriteLine("{0}Expiry Date: {1}{0}", Environment.NewLine, x509.NotAfter)
            Console.WriteLine("{0}Thumbprint: {1}{0}", Environment.NewLine, x509.Thumbprint)
            Console.WriteLine("{0}Serial Number: {1}{0}", Environment.NewLine, x509.SerialNumber)
            Console.WriteLine("{0}Friendly Name: {1}{0}", Environment.NewLine, x509.PublicKey.Oid.FriendlyName)
            Console.WriteLine("{0}Public Key Format: {1}{0}", Environment.NewLine, x509.PublicKey.EncodedKeyValue.Format(True))
            Console.WriteLine("{0}Raw Data Length: {1}{0}", Environment.NewLine, x509.RawData.Length)
            Console.WriteLine("{0}Certificate to string: {1}{0}", Environment.NewLine, x509.ToString(True))

            Console.WriteLine("{0}Certificate to XML String: {1}{0}", Environment.NewLine, x509.PublicKey.Key.ToXmlString(False))

            'Add the certificate to a X509Store.
            Dim store As New X509Store()
            store.Open(OpenFlags.MaxAllowed)
            store.Add(x509)
            store.Close()

        Catch dnfExcept As DirectoryNotFoundException
            Console.WriteLine("Error: The directory specified could not be found.")
        Catch ioExpcept As IOException
            Console.WriteLine("Error: A file in the directory could not be accessed.")
        Catch nrExcept As NullReferenceException
            Console.WriteLine("File must be a .cer file. Program does not have access to that type of file.")
        End Try

    End Sub
End Class

Keterangan

Struktur X.509 berasal dari grup kerja Organisasi Internasional untuk Standardisasi (ISO). Struktur ini dapat digunakan untuk mewakili berbagai jenis informasi termasuk identitas, hak, dan atribut pemegang (izin, usia, jenis kelamin, lokasi, afiliasi, dan sebagainya). Meskipun spesifikasi ISO paling informatif pada struktur itu X509Certificate2 sendiri, kelas ini dirancang untuk memodelkan skenario penggunaan yang ditentukan dalam spesifikasi yang dikeluarkan oleh Infrastruktur Kunci Umum Internet Engineering Task Force (IETF), X.509 (PKIX). Yang paling informatif dari spesifikasi ini adalah RFC 3280, "Sertifikat dan Profil Daftar Pencabutan Sertifikat (CRL). "

Penting

Dimulai dengan .NET Framework 4.6, jenis ini mengimplementasikan IDisposable antarmuka. Ketika Anda telah selesai menggunakan jenis , Anda harus membuangnya baik secara langsung atau tidak langsung. Untuk membuang jenis secara langsung, panggil metodenya Dispose dalam try/catch blok. Untuk membuangnya secara tidak langsung, gunakan konstruksi bahasa seperti using (dalam C#) atau Using (di Visual Basic). Untuk informasi selengkapnya, lihat bagian "Menggunakan Objek yang Mengimplementasikan IDisposable" dalam IDisposable topik antarmuka.

Untuk aplikasi yang menargetkan .NET Framework 4.5.2 dan versi yang lebih lama, X509Certificate2 kelas tidak mengimplementasikan IDisposable antarmuka dan karenanya tidak memiliki Dispose metode .

Konstruktor

X509Certificate2()	Kedaluwarsa. Menginisialisasi instans baru kelas X509Certificate2.
X509Certificate2(Byte[])	Menginisialisasi instans X509Certificate2 baru kelas menggunakan informasi dari array byte.
X509Certificate2(Byte[], SecureString)	Menginisialisasi instans X509Certificate2 baru kelas menggunakan array byte dan kata sandi.
X509Certificate2(Byte[], SecureString, X509KeyStorageFlags)	Menginisialisasi instans X509Certificate2 baru kelas menggunakan array byte, kata sandi, dan bendera penyimpanan kunci.
X509Certificate2(Byte[], String)	Menginisialisasi instans X509Certificate2 baru kelas menggunakan array byte dan kata sandi.
X509Certificate2(Byte[], String, X509KeyStorageFlags)	Menginisialisasi instans X509Certificate2 baru kelas menggunakan array byte, kata sandi, dan bendera penyimpanan kunci.
X509Certificate2(IntPtr)	Menginisialisasi instans X509Certificate2 baru kelas menggunakan handel yang tidak terkelola.
X509Certificate2(ReadOnlySpan<Byte>)	Menginisialisasi instans X509Certificate2 baru kelas dari data sertifikat.
X509Certificate2(ReadOnlySpan<Byte>, ReadOnlySpan<Char>, X509KeyStorageFlags)	Menginisialisasi instans X509Certificate2 baru kelas dari data sertifikat, kata sandi, dan bendera penyimpanan kunci.
X509Certificate2(SerializationInfo, StreamingContext)	Kedaluwarsa. Menginisialisasi instans X509Certificate2 baru kelas menggunakan serialisasi yang ditentukan dan mengalirkan informasi konteks.
X509Certificate2(String)	Menginisialisasi instans X509Certificate2 baru kelas menggunakan nama file sertifikat.
X509Certificate2(String, ReadOnlySpan<Char>, X509KeyStorageFlags)	Menginisialisasi instans X509Certificate2 baru kelas menggunakan nama file sertifikat, kata sandi, dan bendera penyimpanan kunci.
X509Certificate2(String, SecureString)	Menginisialisasi instans X509Certificate2 baru kelas menggunakan nama file sertifikat dan kata sandi.
X509Certificate2(String, SecureString, X509KeyStorageFlags)	Menginisialisasi instans X509Certificate2 baru kelas menggunakan nama file sertifikat, kata sandi, dan bendera penyimpanan kunci.
X509Certificate2(String, String)	Menginisialisasi instans X509Certificate2 baru kelas menggunakan nama file sertifikat dan kata sandi yang digunakan untuk mengakses sertifikat.
X509Certificate2(String, String, X509KeyStorageFlags)	Menginisialisasi instans X509Certificate2 baru kelas menggunakan nama file sertifikat, kata sandi yang digunakan untuk mengakses sertifikat, dan bendera penyimpanan kunci.
X509Certificate2(X509Certificate)	Menginisialisasi instans X509Certificate2 baru kelas menggunakan X509Certificate objek .

Properti

Archived	Mendapatkan atau menetapkan nilai yang menunjukkan bahwa sertifikat X.509 diarsipkan.
Extensions	Mendapatkan kumpulan X509Extension objek.
FriendlyName	Mendapatkan atau mengatur alias terkait untuk sertifikat.
Handle	Mendapatkan handel ke konteks sertifikat MICROSOFT Cryptographic API yang dijelaskan oleh struktur yang tidak dikelola PCCERT_CONTEXT . (Diperoleh dari X509Certificate)
HasPrivateKey	Mendapatkan nilai yang menunjukkan apakah X509Certificate2 objek berisi kunci privat.
Issuer	Mendapatkan nama otoritas sertifikat yang menerbitkan sertifikat X.509v3. (Diperoleh dari X509Certificate)
IssuerName	Mendapatkan nama yang dibedakan dari penerbit sertifikat.
NotAfter	Mendapatkan tanggal dalam waktu lokal setelah sertifikat tidak lagi valid.
NotBefore	Mendapatkan tanggal di waktu lokal di mana sertifikat menjadi valid.
PrivateKey	Kedaluwarsa. Mendapatkan atau mengatur AsymmetricAlgorithm objek yang mewakili kunci privat yang terkait dengan sertifikat.
PublicKey	Mendapatkan objek yang PublicKey terkait dengan sertifikat.
RawData	Mendapatkan data publik X.509 mentah dari sertifikat.
RawDataMemory	Mendapatkan data publik X.509 mentah dari sertifikat.
SerialNumber	Mendapatkan nomor seri sertifikat sebagai string heksadesimal big-endian.
SerialNumberBytes	Mendapatkan representasi big-endian dari nomor seri sertifikat. (Diperoleh dari X509Certificate)
SignatureAlgorithm	Mendapatkan algoritma yang digunakan untuk membuat tanda tangan sertifikat.
Subject	Mendapatkan nama yang dibedakan subjek dari sertifikat. (Diperoleh dari X509Certificate)
SubjectName	Mendapat nama yang dibedakan subjek dari sertifikat.
Thumbprint	Mendapatkan thumbprint sertifikat.
Version	Mendapatkan versi format X.509 dari sertifikat.

Metode

CopyWithPrivateKey(ECDiffieHellman)	Menggabungkan kunci privat dengan kunci ECDiffieHellman umum sertifikat untuk menghasilkan sertifikat ECDiffieHellman baru.
CreateFromEncryptedPem(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>)	Membuat sertifikat X509 baru dari konten sertifikat yang dikodekan RFC 7468 PEM dan kunci privat yang dilindungi kata sandi.
CreateFromEncryptedPemFile(String, ReadOnlySpan<Char>, String)	Membuat sertifikat X509 baru dari konten file sertifikat yang dikodekan RFC 7468 PEM dan kunci privat yang dilindungi kata sandi.
CreateFromPem(ReadOnlySpan<Char>)	Membuat sertifikat X509 baru dari konten sertifikat yang dikodekan RFC 7468 PEM.
CreateFromPem(ReadOnlySpan<Char>, ReadOnlySpan<Char>)	Membuat sertifikat X509 baru dari konten sertifikat yang dikodekan RFC 7468 PEM dan kunci privat.
CreateFromPemFile(String, String)	Membuat sertifikat X509 baru dari konten file sertifikat yang dikodekan RFC 7468 PEM dan kunci privat.
Dispose()	Melepaskan semua sumber daya yang digunakan oleh objek saat ini X509Certificate . (Diperoleh dari X509Certificate)
Dispose(Boolean)	Merilis semua sumber daya tidak terkelola yang digunakan oleh ini X509Certificate dan secara opsional merilis sumber daya terkelola. (Diperoleh dari X509Certificate)
Equals(Object)	Membandingkan dua X509Certificate objek untuk kesetaraan. (Diperoleh dari X509Certificate)
Equals(X509Certificate)	Membandingkan dua X509Certificate objek untuk kesetaraan. (Diperoleh dari X509Certificate)
Export(X509ContentType)	Mengekspor objek saat ini X509Certificate ke array byte dalam format yang dijelaskan oleh salah X509ContentType satu nilai. (Diperoleh dari X509Certificate)
Export(X509ContentType, SecureString)	Mengekspor objek saat ini X509Certificate ke array byte menggunakan format dan kata sandi yang ditentukan. (Diperoleh dari X509Certificate)
Export(X509ContentType, String)	Mengekspor objek saat ini X509Certificate ke array byte dalam format yang dijelaskan oleh salah X509ContentType satu nilai, dan menggunakan kata sandi yang ditentukan. (Diperoleh dari X509Certificate)
ExportCertificatePem()	Mengekspor sertifikat X.509 publik, yang dikodekan sebagai PEM.
GetCertContentType(Byte[])	Menunjukkan jenis sertifikat yang terkandung dalam array byte.
GetCertContentType(ReadOnlySpan<Byte>)	Menunjukkan jenis sertifikat yang terkandung dalam data yang disediakan.
GetCertContentType(String)	Menunjukkan jenis sertifikat yang terkandung dalam file.
GetCertHash()	Mengembalikan nilai hash untuk sertifikat X.509v3 sebagai array byte. (Diperoleh dari X509Certificate)
GetCertHash(HashAlgorithmName)	Mengembalikan nilai hash untuk sertifikat X.509v3 yang dihitung dengan menggunakan algoritma hash kriptografi yang ditentukan. (Diperoleh dari X509Certificate)
GetCertHashString()	Mengembalikan nilai hash SHA1 untuk sertifikat X.509v3 sebagai string heksadesimal. (Diperoleh dari X509Certificate)
GetCertHashString(HashAlgorithmName)	Mengembalikan string heksadesimal yang berisi nilai hash untuk sertifikat X.509v3 yang dihitung menggunakan algoritma hash kriptografi yang ditentukan. (Diperoleh dari X509Certificate)
GetECDiffieHellmanPrivateKey()	ECDiffieHellman Mendapatkan kunci privat dari sertifikat ini.
GetECDiffieHellmanPublicKey()	ECDiffieHellman Mendapatkan kunci umum dari sertifikat ini.
GetEffectiveDateString()	Mengembalikan tanggal berlaku sertifikat X.509v3 ini. (Diperoleh dari X509Certificate)
GetExpirationDateString()	Mengembalikan tanggal kedaluwarsa sertifikat X.509v3 ini. (Diperoleh dari X509Certificate)
GetFormat()	Menampilkan nama format sertifikat X.509v3 ini. (Diperoleh dari X509Certificate)
GetHashCode()	Mengembalikan kode hash untuk sertifikat X.509v3 sebagai bilangan bulat. (Diperoleh dari X509Certificate)
GetIssuerName()	Kedaluwarsa. Mengembalikan nama otoritas sertifikasi yang mengeluarkan sertifikat X.509v3. (Diperoleh dari X509Certificate)
GetKeyAlgorithm()	Mengembalikan informasi algoritme kunci untuk sertifikat X.509v3 ini sebagai string. (Diperoleh dari X509Certificate)
GetKeyAlgorithmParameters()	Mengembalikan parameter algoritma kunci untuk sertifikat X.509v3 sebagai array byte. (Diperoleh dari X509Certificate)
GetKeyAlgorithmParametersString()	Mengembalikan parameter algoritme kunci untuk sertifikat X.509v3 sebagai string heksadesimal. (Diperoleh dari X509Certificate)
GetName()	Kedaluwarsa. Mengembalikan nama prinsipal tempat sertifikat diterbitkan. (Diperoleh dari X509Certificate)
GetNameInfo(X509NameType, Boolean)	Mendapatkan nama subjek dan penerbit dari sertifikat.
GetPublicKey()	Mengembalikan kunci umum untuk sertifikat X.509v3 sebagai array byte. (Diperoleh dari X509Certificate)
GetPublicKeyString()	Mengembalikan kunci publik untuk sertifikat X.509v3 sebagai string heksadesimal. (Diperoleh dari X509Certificate)
GetRawCertData()	Mengembalikan data mentah untuk seluruh sertifikat X.509v3 sebagai array byte. (Diperoleh dari X509Certificate)
GetRawCertDataString()	Mengembalikan data mentah untuk seluruh sertifikat X.509v3 sebagai string heksadesimal. (Diperoleh dari X509Certificate)
GetSerialNumber()	Mengembalikan nomor seri sertifikat X.509v3 sebagai array byte dalam urutan little-endian. (Diperoleh dari X509Certificate)
GetSerialNumberString()	Mengembalikan nomor seri sertifikat X.509v3 sebagai string heksadesimal little-endian . (Diperoleh dari X509Certificate)
GetType()	Mendapatkan instans Type saat ini. (Diperoleh dari Object)
Import(Byte[])	Kedaluwarsa. Mengisi X509Certificate2 objek dengan data dari array byte.
Import(Byte[], SecureString, X509KeyStorageFlags)	Kedaluwarsa. Mengisi X509Certificate2 objek menggunakan data dari array byte, kata sandi, dan bendera penyimpanan kunci.
Import(Byte[], String, X509KeyStorageFlags)	Kedaluwarsa. Mengisi X509Certificate2 objek menggunakan data dari array byte, kata sandi, dan bendera untuk menentukan cara mengimpor kunci privat.
Import(String)	Kedaluwarsa. Mengisi X509Certificate2 objek dengan informasi dari file sertifikat.
Import(String, SecureString, X509KeyStorageFlags)	Kedaluwarsa. Mengisi X509Certificate2 objek dengan informasi dari file sertifikat, kata sandi, dan bendera penyimpanan kunci.
Import(String, String, X509KeyStorageFlags)	Kedaluwarsa. Mengisi X509Certificate2 objek dengan informasi dari file sertifikat, kata sandi, dan X509KeyStorageFlags nilai.
MatchesHostname(String, Boolean, Boolean)	Memeriksa untuk melihat apakah sertifikat cocok dengan nama host yang disediakan.
MemberwiseClone()	Membuat salinan dangkal dari yang saat ini Object. (Diperoleh dari Object)
Reset()	Mereset status X509Certificate2 objek.
ToString()	Menampilkan sertifikat X.509 dalam format teks.
ToString(Boolean)	Menampilkan sertifikat X.509 dalam format teks.
TryExportCertificatePem(Span<Char>, Int32)	Upaya untuk mengekspor sertifikat X.509 publik, dikodekan sebagai PEM.
TryGetCertHash(HashAlgorithmName, Span<Byte>, Int32)	Mencoba menghasilkan "thumbprint" untuk sertifikat dengan hash representasi sertifikat yang dikodekan dengan algoritma hash yang ditentukan. (Diperoleh dari X509Certificate)
Verify()	Melakukan validasi rantai X.509 menggunakan kebijakan validasi dasar.

Implementasi Antarmuka Eksplisit

IDeserializationCallback.OnDeserialization(Object)	ISerializable Mengimplementasikan antarmuka dan dipanggil kembali oleh peristiwa deserialisasi ketika deserialisasi selesai. (Diperoleh dari X509Certificate)
ISerializable.GetObjectData(SerializationInfo, StreamingContext)	Mendapatkan informasi serialisasi dengan semua data yang diperlukan untuk membuat ulang instans objek saat ini X509Certificate . (Diperoleh dari X509Certificate)

Metode Ekstensi

CopyWithPrivateKey(X509Certificate2, DSA)	Menggabungkan kunci privat dengan kunci DSA umum sertifikat untuk menghasilkan sertifikat DSA baru.
GetDSAPrivateKey(X509Certificate2)	DSA Mendapatkan kunci privat dari X509Certificate2.
GetDSAPublicKey(X509Certificate2)	DSA Mendapatkan kunci publik dari X509Certificate2.
CopyWithPrivateKey(X509Certificate2, ECDsa)	Menggabungkan kunci privat dengan kunci ECDsa publik sertifikat untuk menghasilkan sertifikat ECDSA baru.
GetECDsaPrivateKey(X509Certificate2)	ECDsa Mendapatkan kunci privat dari X509Certificate2 sertifikat.
GetECDsaPublicKey(X509Certificate2)	ECDsa Mendapatkan kunci publik dari X509Certificate2 sertifikat.
CopyWithPrivateKey(X509Certificate2, RSA)	Menggabungkan kunci privat dengan kunci RSA umum sertifikat untuk menghasilkan sertifikat RSA baru.
GetRSAPrivateKey(X509Certificate2)	RSA Mendapatkan kunci privat dari X509Certificate2.
GetRSAPublicKey(X509Certificate2)	RSA Mendapatkan kunci publik dari X509Certificate2.