X509Certificate.CreateFromCertFile(String) メソッド

  • リファレンス

定義

名前空間:
System.Security.Cryptography.X509Certificates
アセンブリ:
System.Security.Cryptography.X509Certificates.dll
アセンブリ:
System.Security.Cryptography.dll
アセンブリ:
mscorlib.dll
アセンブリ:
netstandard.dll
ソース:
X509Certificate.cs
ソース:
X509Certificate.cs
ソース:
X509Certificate.cs

注意事項

Loading certificate data through the constructor or Import is obsolete. Use X509CertificateLoader instead to load certificates.

指定した PKCS7 署名済みファイルから X.509v3 証明書を作成します。

public:
 static System::Security::Cryptography::X509Certificates::X509Certificate ^ CreateFromCertFile(System::String ^ filename);
public static System.Security.Cryptography.X509Certificates.X509Certificate CreateFromCertFile (string filename);
[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public static System.Security.Cryptography.X509Certificates.X509Certificate CreateFromCertFile (string filename);
[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
[System.Obsolete("Loading certificate data through the constructor or Import is obsolete. Use X509CertificateLoader instead to load certificates.", DiagnosticId="SYSLIB0057", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public static System.Security.Cryptography.X509Certificates.X509Certificate CreateFromCertFile (string filename);
static member CreateFromCertFile : string -> System.Security.Cryptography.X509Certificates.X509Certificate
[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
static member CreateFromCertFile : string -> System.Security.Cryptography.X509Certificates.X509Certificate
[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
[<System.Obsolete("Loading certificate data through the constructor or Import is obsolete. Use X509CertificateLoader instead to load certificates.", DiagnosticId="SYSLIB0057", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
static member CreateFromCertFile : string -> System.Security.Cryptography.X509Certificates.X509Certificate
Public Shared Function CreateFromCertFile (filename As String) As X509Certificate

パラメーター

filename
String

X.509 証明書の作成元となる PKCS7 署名済みファイルのパス。

戻り値

X509Certificate

新しく作成された X.509 証明書。

属性
UnsupportedOSPlatformAttribute ObsoleteAttribute

例外

ArgumentException

filename パラメーターは nullです。

例

次の例では、指定した認定ファイルから X509Certificate を作成します。

using namespace System;
using namespace System::Security::Cryptography::X509Certificates;
int main()
{
   
   // The path to the certificate.
   String^ Certificate = "Certificate.cer";
   
   // Load the certificate into an X509Certificate object.
   X509Certificate^ cert = X509Certificate::CreateFromCertFile( Certificate );
   
   // Get the value.
   String^ resultsTrue = cert->ToString( true );
   
   // Display the value to the console.
   Console::WriteLine( resultsTrue );
   
   // Get the value.
   String^ resultsFalse = cert->ToString( false );
   
   // Display the value to the console.
   Console::WriteLine( resultsFalse );
}

using System;
using System.Security.Cryptography.X509Certificates;

public class X509
{
    public static void Main()
    {
        // The path to the certificate.
        string Certificate =  "Certificate.cer";

        // Load the certificate into an X509Certificate object.
        X509Certificate cert = X509Certificate.CreateFromCertFile(Certificate);

        // Get the value.
        string resultsTrue = cert.ToString(true);

        // Display the value to the console.
        Console.WriteLine(resultsTrue);

        // Get the value.
        string resultsFalse = cert.ToString(false);

        // Display the value to the console.
        Console.WriteLine(resultsFalse);
    }
}

Imports System.Security.Cryptography.X509Certificates




Public Class X509
   
   
   Public Shared Sub Main()
      
      ' The path to the certificate.
      Dim Certificate As String = "Certificate.cer"
      
      ' Load the certificate into an X509Certificate object.
      Dim cert As X509Certificate = X509Certificate.CreateFromCertFile(Certificate)
      
      ' Get the value.
      Dim resultsTrue As String = cert.ToString(True)
      
      ' Display the value to the console.
      Console.WriteLine(resultsTrue)
      
      ' Get the value.
      Dim resultsFalse As String = cert.ToString(False)
      
      ' Display the value to the console.
      Console.WriteLine(resultsFalse)
   End Sub  
End Class

注釈

ASN.1 DER は、このクラスでサポートされている唯一の証明書形式です。

手記

証明書ファイルは、.cer ファイルに限定されません。 Authenticode 署名付き .pfx ファイルを含め、任意の PKCS7 署名済みファイルを使用できます。

適用対象