X509Extension コンストラクター

リファレンス

定義

名前空間:: System.Security.Cryptography.X509Certificates

アセンブリ:: netstandard.dll, System.Security.Cryptography.dll

アセンブリ:: netstandard.dll, System.Security.Cryptography.X509Certificates.dll

アセンブリ:: netstandard.dll, System.Security.Cryptography.dll, System.Security.Cryptography.X509Certificates.dll

アセンブリ:: System.Security.Cryptography.X509Certificates.dll

アセンブリ:: System.dll

アセンブリ:: netstandard.dll

重要

一部の情報は、リリース前に大きく変更される可能性があるプレリリースされた製品に関するものです。 Microsoft は、ここに記載されている情報について、明示または黙示を問わず、一切保証しません。

X509Extension クラスの新しいインスタンスを初期化します。

オーバーロード

X509Extension()	X509Extension クラスの新しいインスタンスを初期化します。
X509Extension(AsnEncodedData, Boolean)	X509Extension クラスの新しいインスタンスを初期化します。
X509Extension(Oid, Byte[], Boolean)	X509Extension クラスの新しいインスタンスを初期化します。
X509Extension(Oid, ReadOnlySpan<Byte>, Boolean)	X509Extension クラスの新しいインスタンスを初期化します。
X509Extension(String, Byte[], Boolean)	X509Extension クラスの新しいインスタンスを初期化します。
X509Extension(String, ReadOnlySpan<Byte>, Boolean)	X509Extension クラスの新しいインスタンスを初期化します。

X509Extension()

ソース:: X509Extension.cs

ソース:: X509Extension.cs

ソース:: X509Extension.cs

ソース:: X509Extension.cs

X509Extension クラスの新しいインスタンスを初期化します。

protected:
 X509Extension();

protected X509Extension();

Protected Sub New ()

例

次のコード例では、クラスの使用方法を X509Extension 示します。

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

public class CertSelect
{
    public static void Main()
    {
        try
        {
            X509Store store = new X509Store("MY", StoreLocation.CurrentUser);
            store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);

            X509Certificate2Collection collection = (X509Certificate2Collection)store.Certificates;
            for (int i = 0; i < collection.Count; i++)
            {
                foreach (X509Extension extension in collection[i].Extensions)
                {
                    Console.WriteLine(extension.Oid.FriendlyName + "(" + extension.Oid.Value + ")");

                    if (extension.Oid.FriendlyName == "Key Usage")
                    {
                        X509KeyUsageExtension ext = (X509KeyUsageExtension)extension;
                        Console.WriteLine(ext.KeyUsages);
                    }

                    if (extension.Oid.FriendlyName == "Basic Constraints")
                    {
                        X509BasicConstraintsExtension ext = (X509BasicConstraintsExtension)extension;
                        Console.WriteLine(ext.CertificateAuthority);
                        Console.WriteLine(ext.HasPathLengthConstraint);
                        Console.WriteLine(ext.PathLengthConstraint);
                    }

                    if (extension.Oid.FriendlyName == "Subject Key Identifier")
                    {
                        X509SubjectKeyIdentifierExtension ext = (X509SubjectKeyIdentifierExtension)extension;
                        Console.WriteLine(ext.SubjectKeyIdentifier);
                    }

                    if (extension.Oid.FriendlyName == "Enhanced Key Usage")
                    {
                        X509EnhancedKeyUsageExtension ext = (X509EnhancedKeyUsageExtension)extension;
                        OidCollection oids = ext.EnhancedKeyUsages;
                        foreach (Oid oid in oids)
                        {
                            Console.WriteLine(oid.FriendlyName + "(" + oid.Value + ")");
                        }
                    }
                }
            }
            store.Close();
        }
        catch (CryptographicException)
        {
            Console.WriteLine("Information could not be written out for this certificate.");
        }
    }
}

Imports System.Security.Cryptography
Imports System.Security.Cryptography.X509Certificates



Module CertSelect

    Sub Main()
        Try
            Dim store As New X509Store("MY", StoreLocation.CurrentUser)
            store.Open(OpenFlags.ReadOnly Or OpenFlags.OpenExistingOnly)

            Dim collection As X509Certificate2Collection = CType(store.Certificates, X509Certificate2Collection)
            For i As Integer = 0 To collection.Count - 1
                Dim extension As X509Extension
                For Each extension In collection(i).Extensions
                    Console.WriteLine(extension.Oid.FriendlyName + "(" + extension.Oid.Value + ")")


                    If extension.Oid.FriendlyName = "Key Usage" Then
                        Dim ext As X509KeyUsageExtension = CType(extension, X509KeyUsageExtension)
                        Console.WriteLine(ext.KeyUsages)
                    End If

                    If extension.Oid.FriendlyName = "Basic Constraints" Then
                        Dim ext As X509BasicConstraintsExtension = CType(extension, X509BasicConstraintsExtension)
                        Console.WriteLine(ext.CertificateAuthority)
                        Console.WriteLine(ext.HasPathLengthConstraint)
                        Console.WriteLine(ext.PathLengthConstraint)
                    End If

                    If extension.Oid.FriendlyName = "Subject Key Identifier" Then
                        Dim ext As X509SubjectKeyIdentifierExtension = CType(extension, X509SubjectKeyIdentifierExtension)
                        Console.WriteLine(ext.SubjectKeyIdentifier)
                    End If

                    If extension.Oid.FriendlyName = "Enhanced Key Usage" Then
                        Dim ext As X509EnhancedKeyUsageExtension = CType(extension, X509EnhancedKeyUsageExtension)
                        Dim oids As OidCollection = ext.EnhancedKeyUsages
                        Dim oid As Oid
                        For Each oid In oids
                            Console.WriteLine(oid.FriendlyName + "(" + oid.Value + ")")
                        Next oid
                    End If
                Next extension
            Next i
            store.Close()
        Catch
            Console.WriteLine("Information could not be written out for this certificate.")
        End Try

    End Sub
End Module

注釈

このコンストラクターは、バイト配列、ポインター、または証明書ファイルの証明書情報を使用してオブジェクトを作成する、このクラスの他のコンストラクターとは異なり、空 X509Extension のオブジェクトを作成します。

適用対象

X509Extension(AsnEncodedData, Boolean)

ソース:: X509Extension.cs

ソース:: X509Extension.cs

ソース:: X509Extension.cs

ソース:: X509Extension.cs

X509Extension クラスの新しいインスタンスを初期化します。

public:
 X509Extension(System::Security::Cryptography::AsnEncodedData ^ encodedExtension, bool critical);

public X509Extension(System.Security.Cryptography.AsnEncodedData encodedExtension, bool critical);

new System.Security.Cryptography.X509Certificates.X509Extension : System.Security.Cryptography.AsnEncodedData * bool -> System.Security.Cryptography.X509Certificates.X509Extension

Public Sub New (encodedExtension As AsnEncodedData, critical As Boolean)

パラメーター

encodedExtension: AsnEncodedData

拡張機能の作成に使用するエンコード済みのデータ。

critical: Boolean

拡張機能がクリティカルである場合は true。それ以外の場合は false。

例

次のコード例では、クラスの使用方法を X509Extension 示します。

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

public class CertSelect
{
    public static void Main()
    {
        try
        {
            X509Store store = new X509Store("MY", StoreLocation.CurrentUser);
            store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);

            X509Certificate2Collection collection = (X509Certificate2Collection)store.Certificates;
            for (int i = 0; i < collection.Count; i++)
            {
                foreach (X509Extension extension in collection[i].Extensions)
                {
                    Console.WriteLine(extension.Oid.FriendlyName + "(" + extension.Oid.Value + ")");

                    if (extension.Oid.FriendlyName == "Key Usage")
                    {
                        X509KeyUsageExtension ext = (X509KeyUsageExtension)extension;
                        Console.WriteLine(ext.KeyUsages);
                    }

                    if (extension.Oid.FriendlyName == "Basic Constraints")
                    {
                        X509BasicConstraintsExtension ext = (X509BasicConstraintsExtension)extension;
                        Console.WriteLine(ext.CertificateAuthority);
                        Console.WriteLine(ext.HasPathLengthConstraint);
                        Console.WriteLine(ext.PathLengthConstraint);
                    }

                    if (extension.Oid.FriendlyName == "Subject Key Identifier")
                    {
                        X509SubjectKeyIdentifierExtension ext = (X509SubjectKeyIdentifierExtension)extension;
                        Console.WriteLine(ext.SubjectKeyIdentifier);
                    }

                    if (extension.Oid.FriendlyName == "Enhanced Key Usage")
                    {
                        X509EnhancedKeyUsageExtension ext = (X509EnhancedKeyUsageExtension)extension;
                        OidCollection oids = ext.EnhancedKeyUsages;
                        foreach (Oid oid in oids)
                        {
                            Console.WriteLine(oid.FriendlyName + "(" + oid.Value + ")");
                        }
                    }
                }
            }
            store.Close();
        }
        catch (CryptographicException)
        {
            Console.WriteLine("Information could not be written out for this certificate.");
        }
    }
}

Imports System.Security.Cryptography
Imports System.Security.Cryptography.X509Certificates



Module CertSelect

    Sub Main()
        Try
            Dim store As New X509Store("MY", StoreLocation.CurrentUser)
            store.Open(OpenFlags.ReadOnly Or OpenFlags.OpenExistingOnly)

            Dim collection As X509Certificate2Collection = CType(store.Certificates, X509Certificate2Collection)
            For i As Integer = 0 To collection.Count - 1
                Dim extension As X509Extension
                For Each extension In collection(i).Extensions
                    Console.WriteLine(extension.Oid.FriendlyName + "(" + extension.Oid.Value + ")")


                    If extension.Oid.FriendlyName = "Key Usage" Then
                        Dim ext As X509KeyUsageExtension = CType(extension, X509KeyUsageExtension)
                        Console.WriteLine(ext.KeyUsages)
                    End If

                    If extension.Oid.FriendlyName = "Basic Constraints" Then
                        Dim ext As X509BasicConstraintsExtension = CType(extension, X509BasicConstraintsExtension)
                        Console.WriteLine(ext.CertificateAuthority)
                        Console.WriteLine(ext.HasPathLengthConstraint)
                        Console.WriteLine(ext.PathLengthConstraint)
                    End If

                    If extension.Oid.FriendlyName = "Subject Key Identifier" Then
                        Dim ext As X509SubjectKeyIdentifierExtension = CType(extension, X509SubjectKeyIdentifierExtension)
                        Console.WriteLine(ext.SubjectKeyIdentifier)
                    End If

                    If extension.Oid.FriendlyName = "Enhanced Key Usage" Then
                        Dim ext As X509EnhancedKeyUsageExtension = CType(extension, X509EnhancedKeyUsageExtension)
                        Dim oids As OidCollection = ext.EnhancedKeyUsages
                        Dim oid As Oid
                        For Each oid In oids
                            Console.WriteLine(oid.FriendlyName + "(" + oid.Value + ")")
                        Next oid
                    End If
                Next extension
            Next i
            store.Close()
        Catch
            Console.WriteLine("Information could not be written out for this certificate.")
        End Try

    End Sub
End Module

注釈

拡張機能を作成する情報が既にオブジェクトにある場合は、このコンストラクターを AsnEncodedData 使用します。

適用対象

X509Extension(Oid, Byte[], Boolean)

ソース:: X509Extension.cs

ソース:: X509Extension.cs

ソース:: X509Extension.cs

ソース:: X509Extension.cs

X509Extension クラスの新しいインスタンスを初期化します。

public:
 X509Extension(System::Security::Cryptography::Oid ^ oid, cli::array <System::Byte> ^ rawData, bool critical);

public X509Extension(System.Security.Cryptography.Oid oid, byte[] rawData, bool critical);

new System.Security.Cryptography.X509Certificates.X509Extension : System.Security.Cryptography.Oid * byte[] * bool -> System.Security.Cryptography.X509Certificates.X509Extension

Public Sub New (oid As Oid, rawData As Byte(), critical As Boolean)

パラメーター

oid: Oid

拡張機能の識別に使用するオブジェクト識別子。

rawData: Byte[]

拡張機能の作成に使用するエンコード済みのデータ。

critical: Boolean

拡張機能がクリティカルである場合は true。それ以外の場合は false。

例外

ArgumentNullException

oid が nullです。

ArgumentException

oid が空の文字列 ("") です。

例

次のコード例では、クラスの使用方法を X509Extension 示します。

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

public class CertSelect
{
    public static void Main()
    {
        try
        {
            X509Store store = new X509Store("MY", StoreLocation.CurrentUser);
            store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);

            X509Certificate2Collection collection = (X509Certificate2Collection)store.Certificates;
            for (int i = 0; i < collection.Count; i++)
            {
                foreach (X509Extension extension in collection[i].Extensions)
                {
                    Console.WriteLine(extension.Oid.FriendlyName + "(" + extension.Oid.Value + ")");

                    if (extension.Oid.FriendlyName == "Key Usage")
                    {
                        X509KeyUsageExtension ext = (X509KeyUsageExtension)extension;
                        Console.WriteLine(ext.KeyUsages);
                    }

                    if (extension.Oid.FriendlyName == "Basic Constraints")
                    {
                        X509BasicConstraintsExtension ext = (X509BasicConstraintsExtension)extension;
                        Console.WriteLine(ext.CertificateAuthority);
                        Console.WriteLine(ext.HasPathLengthConstraint);
                        Console.WriteLine(ext.PathLengthConstraint);
                    }

                    if (extension.Oid.FriendlyName == "Subject Key Identifier")
                    {
                        X509SubjectKeyIdentifierExtension ext = (X509SubjectKeyIdentifierExtension)extension;
                        Console.WriteLine(ext.SubjectKeyIdentifier);
                    }

                    if (extension.Oid.FriendlyName == "Enhanced Key Usage")
                    {
                        X509EnhancedKeyUsageExtension ext = (X509EnhancedKeyUsageExtension)extension;
                        OidCollection oids = ext.EnhancedKeyUsages;
                        foreach (Oid oid in oids)
                        {
                            Console.WriteLine(oid.FriendlyName + "(" + oid.Value + ")");
                        }
                    }
                }
            }
            store.Close();
        }
        catch (CryptographicException)
        {
            Console.WriteLine("Information could not be written out for this certificate.");
        }
    }
}

Imports System.Security.Cryptography
Imports System.Security.Cryptography.X509Certificates



Module CertSelect

    Sub Main()
        Try
            Dim store As New X509Store("MY", StoreLocation.CurrentUser)
            store.Open(OpenFlags.ReadOnly Or OpenFlags.OpenExistingOnly)

            Dim collection As X509Certificate2Collection = CType(store.Certificates, X509Certificate2Collection)
            For i As Integer = 0 To collection.Count - 1
                Dim extension As X509Extension
                For Each extension In collection(i).Extensions
                    Console.WriteLine(extension.Oid.FriendlyName + "(" + extension.Oid.Value + ")")


                    If extension.Oid.FriendlyName = "Key Usage" Then
                        Dim ext As X509KeyUsageExtension = CType(extension, X509KeyUsageExtension)
                        Console.WriteLine(ext.KeyUsages)
                    End If

                    If extension.Oid.FriendlyName = "Basic Constraints" Then
                        Dim ext As X509BasicConstraintsExtension = CType(extension, X509BasicConstraintsExtension)
                        Console.WriteLine(ext.CertificateAuthority)
                        Console.WriteLine(ext.HasPathLengthConstraint)
                        Console.WriteLine(ext.PathLengthConstraint)
                    End If

                    If extension.Oid.FriendlyName = "Subject Key Identifier" Then
                        Dim ext As X509SubjectKeyIdentifierExtension = CType(extension, X509SubjectKeyIdentifierExtension)
                        Console.WriteLine(ext.SubjectKeyIdentifier)
                    End If

                    If extension.Oid.FriendlyName = "Enhanced Key Usage" Then
                        Dim ext As X509EnhancedKeyUsageExtension = CType(extension, X509EnhancedKeyUsageExtension)
                        Dim oids As OidCollection = ext.EnhancedKeyUsages
                        Dim oid As Oid
                        For Each oid In oids
                            Console.WriteLine(oid.FriendlyName + "(" + oid.Value + ")")
                        Next oid
                    End If
                Next extension
            Next i
            store.Close()
        Catch
            Console.WriteLine("Information could not be written out for this certificate.")
        End Try

    End Sub
End Module

注釈

このコンストラクターは、パラメーターの情報を oid 使用して、拡張機能のオブジェクト識別子を提供します。

適用対象

X509Extension(Oid, ReadOnlySpan<Byte>, Boolean)

ソース:: X509Extension.cs

ソース:: X509Extension.cs

ソース:: X509Extension.cs

ソース:: X509Extension.cs

X509Extension クラスの新しいインスタンスを初期化します。

public:
 X509Extension(System::Security::Cryptography::Oid ^ oid, ReadOnlySpan<System::Byte> rawData, bool critical);

public X509Extension(System.Security.Cryptography.Oid oid, ReadOnlySpan<byte> rawData, bool critical);

new System.Security.Cryptography.X509Certificates.X509Extension : System.Security.Cryptography.Oid * ReadOnlySpan<byte> * bool -> System.Security.Cryptography.X509Certificates.X509Extension

Public Sub New (oid As Oid, rawData As ReadOnlySpan(Of Byte), critical As Boolean)

パラメーター

oid: Oid

拡張機能の識別に使用するオブジェクト識別子。

rawData: ReadOnlySpan<Byte>

拡張機能の作成に使用するエンコード済みのデータ。

critical: Boolean

拡張機能がクリティカルである場合は true。それ以外の場合は false。

適用対象

X509Extension(String, Byte[], Boolean)

ソース:: X509Extension.cs

ソース:: X509Extension.cs

ソース:: X509Extension.cs

ソース:: X509Extension.cs

X509Extension クラスの新しいインスタンスを初期化します。

public:
 X509Extension(System::String ^ oid, cli::array <System::Byte> ^ rawData, bool critical);

public X509Extension(string oid, byte[] rawData, bool critical);

new System.Security.Cryptography.X509Certificates.X509Extension : string * byte[] * bool -> System.Security.Cryptography.X509Certificates.X509Extension

Public Sub New (oid As String, rawData As Byte(), critical As Boolean)

パラメーター

oid: String

オブジェクト識別子を表す文字列。

rawData: Byte[]

拡張機能の作成に使用するエンコード済みのデータ。

critical: Boolean

拡張機能がクリティカルである場合は true。それ以外の場合は false。

例

次のコード例では、クラスの使用方法を X509Extension 示します。

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

public class CertSelect
{
    public static void Main()
    {
        try
        {
            X509Store store = new X509Store("MY", StoreLocation.CurrentUser);
            store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);

            X509Certificate2Collection collection = (X509Certificate2Collection)store.Certificates;
            for (int i = 0; i < collection.Count; i++)
            {
                foreach (X509Extension extension in collection[i].Extensions)
                {
                    Console.WriteLine(extension.Oid.FriendlyName + "(" + extension.Oid.Value + ")");

                    if (extension.Oid.FriendlyName == "Key Usage")
                    {
                        X509KeyUsageExtension ext = (X509KeyUsageExtension)extension;
                        Console.WriteLine(ext.KeyUsages);
                    }

                    if (extension.Oid.FriendlyName == "Basic Constraints")
                    {
                        X509BasicConstraintsExtension ext = (X509BasicConstraintsExtension)extension;
                        Console.WriteLine(ext.CertificateAuthority);
                        Console.WriteLine(ext.HasPathLengthConstraint);
                        Console.WriteLine(ext.PathLengthConstraint);
                    }

                    if (extension.Oid.FriendlyName == "Subject Key Identifier")
                    {
                        X509SubjectKeyIdentifierExtension ext = (X509SubjectKeyIdentifierExtension)extension;
                        Console.WriteLine(ext.SubjectKeyIdentifier);
                    }

                    if (extension.Oid.FriendlyName == "Enhanced Key Usage")
                    {
                        X509EnhancedKeyUsageExtension ext = (X509EnhancedKeyUsageExtension)extension;
                        OidCollection oids = ext.EnhancedKeyUsages;
                        foreach (Oid oid in oids)
                        {
                            Console.WriteLine(oid.FriendlyName + "(" + oid.Value + ")");
                        }
                    }
                }
            }
            store.Close();
        }
        catch (CryptographicException)
        {
            Console.WriteLine("Information could not be written out for this certificate.");
        }
    }
}

Imports System.Security.Cryptography
Imports System.Security.Cryptography.X509Certificates



Module CertSelect

    Sub Main()
        Try
            Dim store As New X509Store("MY", StoreLocation.CurrentUser)
            store.Open(OpenFlags.ReadOnly Or OpenFlags.OpenExistingOnly)

            Dim collection As X509Certificate2Collection = CType(store.Certificates, X509Certificate2Collection)
            For i As Integer = 0 To collection.Count - 1
                Dim extension As X509Extension
                For Each extension In collection(i).Extensions
                    Console.WriteLine(extension.Oid.FriendlyName + "(" + extension.Oid.Value + ")")


                    If extension.Oid.FriendlyName = "Key Usage" Then
                        Dim ext As X509KeyUsageExtension = CType(extension, X509KeyUsageExtension)
                        Console.WriteLine(ext.KeyUsages)
                    End If

                    If extension.Oid.FriendlyName = "Basic Constraints" Then
                        Dim ext As X509BasicConstraintsExtension = CType(extension, X509BasicConstraintsExtension)
                        Console.WriteLine(ext.CertificateAuthority)
                        Console.WriteLine(ext.HasPathLengthConstraint)
                        Console.WriteLine(ext.PathLengthConstraint)
                    End If

                    If extension.Oid.FriendlyName = "Subject Key Identifier" Then
                        Dim ext As X509SubjectKeyIdentifierExtension = CType(extension, X509SubjectKeyIdentifierExtension)
                        Console.WriteLine(ext.SubjectKeyIdentifier)
                    End If

                    If extension.Oid.FriendlyName = "Enhanced Key Usage" Then
                        Dim ext As X509EnhancedKeyUsageExtension = CType(extension, X509EnhancedKeyUsageExtension)
                        Dim oids As OidCollection = ext.EnhancedKeyUsages
                        Dim oid As Oid
                        For Each oid In oids
                            Console.WriteLine(oid.FriendlyName + "(" + oid.Value + ")")
                        Next oid
                    End If
                Next extension
            Next i
            store.Close()
        Catch
            Console.WriteLine("Information could not be written out for this certificate.")
        End Try

    End Sub
End Module

注釈

このコンストラクターは、パラメーターの情報を oid 使用して、拡張機能のオブジェクト識別子を提供します。

適用対象

X509Extension(String, ReadOnlySpan<Byte>, Boolean)

ソース:: X509Extension.cs

ソース:: X509Extension.cs

ソース:: X509Extension.cs

ソース:: X509Extension.cs

X509Extension クラスの新しいインスタンスを初期化します。

public:
 X509Extension(System::String ^ oid, ReadOnlySpan<System::Byte> rawData, bool critical);

public X509Extension(string oid, ReadOnlySpan<byte> rawData, bool critical);

new System.Security.Cryptography.X509Certificates.X509Extension : string * ReadOnlySpan<byte> * bool -> System.Security.Cryptography.X509Certificates.X509Extension

Public Sub New (oid As String, rawData As ReadOnlySpan(Of Byte), critical As Boolean)

パラメーター

oid: String

拡張機能の識別に使用するオブジェクト識別子。

rawData: ReadOnlySpan<Byte>

拡張機能の作成に使用するエンコード済みのデータ。

critical: Boolean

拡張機能がクリティカルである場合は true。それ以外の場合は false。

適用対象

次の方法で共有

X509Extension コンストラクター

定義

オーバーロード

X509Extension()

例

注釈

適用対象

X509Extension(AsnEncodedData, Boolean)

パラメーター

例

注釈

適用対象

X509Extension(Oid, Byte[], Boolean)

パラメーター

例外

例

注釈

適用対象

X509Extension(Oid, ReadOnlySpan<Byte>, Boolean)

パラメーター

適用対象

X509Extension(String, Byte[], Boolean)

パラメーター

例

注釈

適用対象

X509Extension(String, ReadOnlySpan<Byte>, Boolean)

パラメーター

適用対象