X509SubjectKeyIdentifierExtension Constructors
Definition
Important
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Initializes a new instance of the X509SubjectKeyIdentifierExtension class.
Overloads
| X509SubjectKeyIdentifierExtension() |
Initializes a new instance of the X509SubjectKeyIdentifierExtension class. |
| X509SubjectKeyIdentifierExtension(Byte[], Boolean) |
Initializes a new instance of the X509SubjectKeyIdentifierExtension class using a byte array and a value that identifies whether the extension is critical. |
| X509SubjectKeyIdentifierExtension(ReadOnlySpan<Byte>, Boolean) |
Initializes a new instance of the X509SubjectKeyIdentifierExtension class using a read-only span of bytes and a value that identifies whether the extension is critical. |
| X509SubjectKeyIdentifierExtension(AsnEncodedData, Boolean) |
Initializes a new instance of the X509SubjectKeyIdentifierExtension class using encoded data and a value that identifies whether the extension is critical. |
| X509SubjectKeyIdentifierExtension(PublicKey, Boolean) |
Initializes a new instance of the X509SubjectKeyIdentifierExtension class using a public key and a value indicating whether the extension is critical. |
| X509SubjectKeyIdentifierExtension(String, Boolean) |
Initializes a new instance of the X509SubjectKeyIdentifierExtension class using a string and a value that identifies whether the extension is critical. |
| X509SubjectKeyIdentifierExtension(PublicKey, X509SubjectKeyIdentifierHashAlgorithm, Boolean) |
Initializes a new instance of the X509SubjectKeyIdentifierExtension class using a public key, a hash algorithm identifier, and a value indicating whether the extension is critical. |
X509SubjectKeyIdentifierExtension()
Initializes a new instance of the X509SubjectKeyIdentifierExtension class.
public:
X509SubjectKeyIdentifierExtension();public X509SubjectKeyIdentifierExtension();Public Sub New ()Examples
The following code example demonstrates how to open a user's personal certificate store and display information about each certificate in the store. This example uses the X509SubjectKeyIdentifierExtension class to display the information.
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
Applies to
X509SubjectKeyIdentifierExtension(Byte[], Boolean)
Initializes a new instance of the X509SubjectKeyIdentifierExtension class using a byte array and a value that identifies whether the extension is critical.
public:
X509SubjectKeyIdentifierExtension(cli::array <System::Byte> ^ subjectKeyIdentifier, bool critical);public X509SubjectKeyIdentifierExtension(byte[] subjectKeyIdentifier, bool critical);new System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierExtension : byte[] * bool -> System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierExtensionPublic Sub New (subjectKeyIdentifier As Byte(), critical As Boolean)Parameters
- subjectKeyIdentifier
- Byte[]
A byte array that represents data to use to create the extension.
- critical
- Boolean
true if the extension is critical; otherwise, false.
Applies to
X509SubjectKeyIdentifierExtension(ReadOnlySpan<Byte>, Boolean)
Initializes a new instance of the X509SubjectKeyIdentifierExtension class using a read-only span of bytes and a value that identifies whether the extension is critical.
public:
X509SubjectKeyIdentifierExtension(ReadOnlySpan<System::Byte> subjectKeyIdentifier, bool critical);public X509SubjectKeyIdentifierExtension(ReadOnlySpan<byte> subjectKeyIdentifier, bool critical);new System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierExtension : ReadOnlySpan<byte> * bool -> System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierExtensionPublic Sub New (subjectKeyIdentifier As ReadOnlySpan(Of Byte), critical As Boolean)Parameters
- subjectKeyIdentifier
- ReadOnlySpan<Byte>
A read-only span of bytes that represents data to use to create the extension.
- critical
- Boolean
true if the extension is critical; otherwise, false.
Applies to
X509SubjectKeyIdentifierExtension(AsnEncodedData, Boolean)
Initializes a new instance of the X509SubjectKeyIdentifierExtension class using encoded data and a value that identifies whether the extension is critical.
public:
X509SubjectKeyIdentifierExtension(System::Security::Cryptography::AsnEncodedData ^ encodedSubjectKeyIdentifier, bool critical);public X509SubjectKeyIdentifierExtension(System.Security.Cryptography.AsnEncodedData encodedSubjectKeyIdentifier, bool critical);new System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierExtension : System.Security.Cryptography.AsnEncodedData * bool -> System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierExtensionPublic Sub New (encodedSubjectKeyIdentifier As AsnEncodedData, critical As Boolean)Parameters
- encodedSubjectKeyIdentifier
- AsnEncodedData
The AsnEncodedData object to use to create the extension.
- critical
- Boolean
true if the extension is critical; otherwise, false.
Remarks
Use this constructor if the information to create the extension is already in an AsnEncodedData object.
Applies to
X509SubjectKeyIdentifierExtension(PublicKey, Boolean)
Initializes a new instance of the X509SubjectKeyIdentifierExtension class using a public key and a value indicating whether the extension is critical.
public:
X509SubjectKeyIdentifierExtension(System::Security::Cryptography::X509Certificates::PublicKey ^ key, bool critical);public X509SubjectKeyIdentifierExtension(System.Security.Cryptography.X509Certificates.PublicKey key, bool critical);new System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierExtension : System.Security.Cryptography.X509Certificates.PublicKey * bool -> System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierExtensionPublic Sub New (key As PublicKey, critical As Boolean)Parameters
- critical
- Boolean
true if the extension is critical; otherwise, false.
Applies to
X509SubjectKeyIdentifierExtension(String, Boolean)
Initializes a new instance of the X509SubjectKeyIdentifierExtension class using a string and a value that identifies whether the extension is critical.
public:
X509SubjectKeyIdentifierExtension(System::String ^ subjectKeyIdentifier, bool critical);public X509SubjectKeyIdentifierExtension(string subjectKeyIdentifier, bool critical);new System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierExtension : string * bool -> System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierExtensionPublic Sub New (subjectKeyIdentifier As String, critical As Boolean)Parameters
- subjectKeyIdentifier
- String
A string, encoded in hexadecimal format, that represents the subject key identifier (SKI) for a certificate.
- critical
- Boolean
true if the extension is critical; otherwise, false.
Remarks
The subject key identifier (SKI) can be used to identify the certificate and is often used when working with XML digital signing.
Applies to
X509SubjectKeyIdentifierExtension(PublicKey, X509SubjectKeyIdentifierHashAlgorithm, Boolean)
Initializes a new instance of the X509SubjectKeyIdentifierExtension class using a public key, a hash algorithm identifier, and a value indicating whether the extension is critical.
public:
X509SubjectKeyIdentifierExtension(System::Security::Cryptography::X509Certificates::PublicKey ^ key, System::Security::Cryptography::X509Certificates::X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical);public X509SubjectKeyIdentifierExtension(System.Security.Cryptography.X509Certificates.PublicKey key, System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical);new System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierExtension : System.Security.Cryptography.X509Certificates.PublicKey * System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierHashAlgorithm * bool -> System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierExtensionPublic Sub New (key As PublicKey, algorithm As X509SubjectKeyIdentifierHashAlgorithm, critical As Boolean)Parameters
- algorithm
- X509SubjectKeyIdentifierHashAlgorithm
One of the X509SubjectKeyIdentifierHashAlgorithm values that identifies which hash algorithm to use.
- critical
- Boolean
true if the extension is critical; otherwise, false.
