X509IssuerSerial Struktur
Definition
Wichtig
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Stellt das <X509IssuerSerial>-Element einer XML-Digitalsignatur dar.
public value class X509IssuerSerialpublic struct X509IssuerSerialtype X509IssuerSerial = structPublic Structure X509IssuerSerial- Vererbung
Beispiele
Im folgenden Codebeispiel wird veranschaulicht, wie Sie ein XML-Dokument mithilfe eines X.509-Zertifikats aus einem Zertifikatspeicher signieren und überprüfen. In diesem Beispiel werden wichtige Informationen mithilfe des X509IssuerSerial Objekts im signierten Dokument gespeichert.
//
// This example signs an XML file using an
// envelope signature. It then verifies the
// signed XML.
//
// You must have a certificate with a subject name
// of "CN=XMLDSIG_Test" in the "My" certificate store.
//
// Run the following command to create a certificate
// and place it in the store.
// makecert -r -pe -n "CN=XMLDSIG_Test" -b 01/01/2005 -e 01/01/2010 -sky signing -ss my
using System;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Xml;
public class SignVerifyEnvelope
{
public static void Main(String[] args)
{
string Certificate = "CN=XMLDSIG_Test";
try
{
// Create an XML file to sign.
CreateSomeXml("Example.xml");
Console.WriteLine("New XML file created.");
// Sign the XML that was just created and save it in a
// new file.
SignXmlFile("Example.xml", "SignedExample.xml", Certificate);
Console.WriteLine("XML file signed.");
if (VerifyXmlFile("SignedExample.xml", Certificate))
{
Console.WriteLine("The XML signature is valid.");
}
else
{
Console.WriteLine("The XML signature is not valid.");
}
}
catch (CryptographicException e)
{
Console.WriteLine(e.Message);
}
}
// Sign an XML file and save the signature in a new file.
public static void SignXmlFile(string FileName, string SignedFileName, string SubjectName)
{
if (null == FileName)
throw new ArgumentNullException("FileName");
if (null == SignedFileName)
throw new ArgumentNullException("SignedFileName");
if (null == SubjectName)
throw new ArgumentNullException("SubjectName");
// Load the certificate from the certificate store.
X509Certificate2 cert = GetCertificateBySubject(SubjectName);
// Create a new XML document.
XmlDocument doc = new XmlDocument();
// Format the document to ignore white spaces.
doc.PreserveWhitespace = false;
// Load the passed XML file using it's name.
doc.Load(new XmlTextReader(FileName));
// Create a SignedXml object.
SignedXml signedXml = new SignedXml(doc);
// Add the key to the SignedXml document.
signedXml.SigningKey = cert.GetRSAPrivateKey();
// Create a reference to be signed.
Reference reference = new Reference();
reference.Uri = "";
// Add an enveloped transformation to the reference.
XmlDsigEnvelopedSignatureTransform env = new XmlDsigEnvelopedSignatureTransform();
reference.AddTransform(env);
// Add the reference to the SignedXml object.
signedXml.AddReference(reference);
// Create a new KeyInfo object.
KeyInfo keyInfo = new KeyInfo();
// Load the certificate into a KeyInfoX509Data object
// and add it to the KeyInfo object.
// Create an X509IssuerSerial object and add it to the
// KeyInfoX509Data object.
KeyInfoX509Data kdata = new KeyInfoX509Data(cert);
X509IssuerSerial xserial;
xserial.IssuerName = cert.IssuerName.ToString();
xserial.SerialNumber = cert.SerialNumber;
kdata.AddIssuerSerial(xserial.IssuerName, xserial.SerialNumber);
keyInfo.AddClause(kdata);
// Add the KeyInfo object to the SignedXml object.
signedXml.KeyInfo = keyInfo;
// Compute the signature.
signedXml.ComputeSignature();
// Get the XML representation of the signature and save
// it to an XmlElement object.
XmlElement xmlDigitalSignature = signedXml.GetXml();
// Append the element to the XML document.
doc.DocumentElement.AppendChild(doc.ImportNode(xmlDigitalSignature, true));
if (doc.FirstChild is XmlDeclaration)
{
doc.RemoveChild(doc.FirstChild);
}
// Save the signed XML document to a file specified
// using the passed string.
using (XmlTextWriter xmltw = new XmlTextWriter(SignedFileName, new UTF8Encoding(false)))
{
doc.WriteTo(xmltw);
xmltw.Close();
}
}
// Verify the signature of an XML file against an asymmetric
// algorithm and return the result.
public static Boolean VerifyXmlFile(String FileName, String CertificateSubject)
{
// Check the args.
if (null == FileName)
throw new ArgumentNullException("FileName");
if (null == CertificateSubject)
throw new ArgumentNullException("CertificateSubject");
// Load the certificate from the store.
X509Certificate2 cert = GetCertificateBySubject(CertificateSubject);
// Create a new XML document.
XmlDocument xmlDocument = new XmlDocument();
// Load the passed XML file into the document.
xmlDocument.Load(FileName);
// Create a new SignedXml object and pass it
// the XML document class.
SignedXml signedXml = new SignedXml(xmlDocument);
// Find the "Signature" node and create a new
// XmlNodeList object.
XmlNodeList nodeList = xmlDocument.GetElementsByTagName("Signature");
// Load the signature node.
signedXml.LoadXml((XmlElement)nodeList[0]);
// Check the signature and return the result.
return signedXml.CheckSignature(cert, true);
}
public static X509Certificate2 GetCertificateBySubject(string CertificateSubject)
{
// Check the args.
if (null == CertificateSubject)
throw new ArgumentNullException("CertificateSubject");
// Load the certificate from the certificate store.
X509Certificate2 cert = null;
X509Store store = new X509Store("My", StoreLocation.CurrentUser);
try
{
// Open the store.
store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);
// Get the certs from the store.
X509Certificate2Collection CertCol = store.Certificates;
// Find the certificate with the specified subject.
foreach (X509Certificate2 c in CertCol)
{
if (c.Subject == CertificateSubject)
{
cert = c;
break;
}
}
// Throw an exception of the certificate was not found.
if (cert == null)
{
throw new CryptographicException("The certificate could not be found.");
}
}
finally
{
// Close the store even if an exception was thrown.
store.Close();
}
return cert;
}
// Create example data to sign.
public static void CreateSomeXml(string FileName)
{
// Check the args.
if (null == FileName)
throw new ArgumentNullException("FileName");
// Create a new XmlDocument object.
XmlDocument document = new XmlDocument();
// Create a new XmlNode object.
XmlNode node = document.CreateNode(XmlNodeType.Element, "", "MyElement", "samples");
// Add some text to the node.
node.InnerText = "Example text to be signed.";
// Append the node to the document.
document.AppendChild(node);
// Save the XML document to the file name specified.
using (XmlTextWriter xmltw = new XmlTextWriter(FileName, new UTF8Encoding(false)))
{
document.WriteTo(xmltw);
xmltw.Close();
}
}
}
// This code example displays the following to the console:
//
// New XML file created.
// XML file signed.
// The XML signature is valid.
'
' This example signs an XML file using an
' envelope signature. It then verifies the
' signed XML.
'
' You must have a certificate with a subject name
' of "CN=XMLDSIG_Test" in the "My" certificate store.
'
' Run the following command to create a certificate
' and place it in the store.
' makecert -r -pe -n "CN=XMLDSIG_Test" -b 01/01/2005 -e 01/01/2010 -sky signing -ss my
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml
Imports System.Security.Cryptography.X509Certificates
Imports System.Text
Imports System.Xml
Module SignVerifyEnvelope
Sub Main(ByVal args() As String)
Dim Certificate As String = "CN=XMLDSIG_Test"
Try
' Create an XML file to sign.
CreateSomeXml("Example.xml")
Console.WriteLine("New XML file created.")
' Sign the XML that was just created and save it in a
' new file.
SignXmlFile("Example.xml", "SignedExample.xml", Certificate)
Console.WriteLine("XML file signed.")
If VerifyXmlFile("SignedExample.xml", Certificate) Then
Console.WriteLine("The XML signature is valid.")
Else
Console.WriteLine("The XML signature is not valid.")
End If
Catch e As CryptographicException
Console.WriteLine(e.Message)
End Try
End Sub
' Sign an XML file and save the signature in a new file.
Sub SignXmlFile(ByVal FileName As String, ByVal SignedFileName As String, ByVal SubjectName As String)
If Nothing = FileName Then
Throw New ArgumentNullException("FileName")
End If
If Nothing = SignedFileName Then
Throw New ArgumentNullException("SignedFileName")
End If
If Nothing = SubjectName Then
Throw New ArgumentNullException("SubjectName")
End If
' Load the certificate from the certificate store.
Dim cert As X509Certificate2 = GetCertificateBySubject(SubjectName)
' Create a new XML document.
Dim doc As New XmlDocument()
' Format the document to ignore white spaces.
doc.PreserveWhitespace = False
' Load the passed XML file using it's name.
doc.Load(New XmlTextReader(FileName))
' Create a SignedXml object.
Dim signedXml As New SignedXml(doc)
' Add the key to the SignedXml document.
signedXml.SigningKey = cert.GetRSAPrivateKey()
' Create a reference to be signed.
Dim reference As New Reference()
reference.Uri = ""
' Add an enveloped transformation to the reference.
Dim env As New XmlDsigEnvelopedSignatureTransform()
reference.AddTransform(env)
' Add the reference to the SignedXml object.
signedXml.AddReference(reference)
' Create a new KeyInfo object.
Dim keyInfo As New KeyInfo()
' Load the certificate into a KeyInfoX509Data object
' and add it to the KeyInfo object.
' Create an X509IssuerSerial object and add it to the
' KeyInfoX509Data object.
Dim kdata As New KeyInfoX509Data(cert)
Dim xserial As X509IssuerSerial
xserial.IssuerName = cert.IssuerName.ToString()
xserial.SerialNumber = cert.SerialNumber
kdata.AddIssuerSerial(xserial.IssuerName, xserial.SerialNumber)
keyInfo.AddClause(kdata)
' Add the KeyInfo object to the SignedXml object.
signedXml.KeyInfo = keyInfo
' Compute the signature.
signedXml.ComputeSignature()
' Get the XML representation of the signature and save
' it to an XmlElement object.
Dim xmlDigitalSignature As XmlElement = signedXml.GetXml()
' Append the element to the XML document.
doc.DocumentElement.AppendChild(doc.ImportNode(xmlDigitalSignature, True))
If TypeOf doc.FirstChild Is XmlDeclaration Then
doc.RemoveChild(doc.FirstChild)
End If
' Save the signed XML document to a file specified
' using the passed string.
Dim xmltw As New XmlTextWriter(SignedFileName, New UTF8Encoding(False))
Try
doc.WriteTo(xmltw)
Finally
xmltw.Close()
End Try
End Sub
' Verify the signature of an XML file against an asymmetric
' algorithm and return the result.
Function VerifyXmlFile(ByVal FileName As String, ByVal CertificateSubject As String) As [Boolean]
' Check the args.
If Nothing = FileName Then
Throw New ArgumentNullException("FileName")
End If
If Nothing = CertificateSubject Then
Throw New ArgumentNullException("CertificateSubject")
End If
' Load the certificate from the store.
Dim cert As X509Certificate2 = GetCertificateBySubject(CertificateSubject)
' Create a new XML document.
Dim xmlDocument As New XmlDocument()
' Load the passed XML file into the document.
xmlDocument.Load(FileName)
' Create a new SignedXml object and pass it
' the XML document class.
Dim signedXml As New SignedXml(xmlDocument)
' Find the "Signature" node and create a new
' XmlNodeList object.
Dim nodeList As XmlNodeList = xmlDocument.GetElementsByTagName("Signature")
' Load the signature node.
signedXml.LoadXml(CType(nodeList(0), XmlElement))
' Check the signature and return the result.
Return signedXml.CheckSignature(cert, True)
End Function
Function GetCertificateBySubject(ByVal CertificateSubject As String) As X509Certificate2
' Check the args.
If Nothing = CertificateSubject Then
Throw New ArgumentNullException("CertificateSubject")
End If
' Load the certificate from the certificate store.
Dim cert As X509Certificate2 = Nothing
Dim store As New X509Store("My", StoreLocation.CurrentUser)
Try
' Open the store.
store.Open(OpenFlags.ReadOnly Or OpenFlags.OpenExistingOnly)
' Get the certs from the store.
Dim CertCol As X509Certificate2Collection = store.Certificates
' Find the certificate with the specified subject.
Dim c As X509Certificate2
For Each c In CertCol
If c.Subject = CertificateSubject Then
cert = c
Exit For
End If
Next c
' Throw an exception of the certificate was not found.
If cert Is Nothing Then
Throw New CryptographicException("The certificate could not be found.")
End If
Finally
' Close the store even if an exception was thrown.
store.Close()
End Try
Return cert
End Function
' Create example data to sign.
Sub CreateSomeXml(ByVal FileName As String)
' Check the args.
If Nothing = FileName Then
Throw New ArgumentNullException("FileName")
End If
' Create a new XmlDocument object.
Dim document As New XmlDocument()
' Create a new XmlNode object.
Dim node As XmlNode = document.CreateNode(XmlNodeType.Element, "", "MyElement", "samples")
' Add some text to the node.
node.InnerText = "Example text to be signed."
' Append the node to the document.
document.AppendChild(node)
' Save the XML document to the file name specified.
Dim xmltw As New XmlTextWriter(FileName, New UTF8Encoding(False))
Try
document.WriteTo(xmltw)
Finally
xmltw.Close()
End Try
End Sub
End Module
' This code example displays the following to the console:
'
' New XML file created.
' XML file signed.
' The XML signature is valid.
Hinweise
Die X509IssuerSerial Struktur stellt das <X509IssuerSerial> Element einer digitalen XML-Signatur dar, die durch die SPEZIFIKATION der digitalen XML-Signatur definiert wird. Das <X509IssuerSerial> Element ist das Unterelement des <X509Data> Elements, das ein X.509v3-Zertifikatheraussteller-Namen und fortlaufendes Nummernpaar enthält. Das unterscheidungsbezogene Name- und Seriennummernpaar hilft beim Identifizieren eines bestimmten X.509v3-Zertifikats.
Der Aussteller eines X.509-Zertifikats ist der Name der Zertifizierungsstelle, die das Zertifikat ausgestellt hat. Zertifizierungsstellen weisen jedes Zertifikat zu, das sie zur Identifizierung einer eindeutigen Seriennummer ausstellen.
Verwenden Sie die Struktur, um bei Verwendung der X509IssuerSerial KeyInfoX509Data Klasse den unterschiedenen Namen und das Seriennummernpaar eines Zertifikatausgebers anzugeben. Sie können der Klasse mithilfe der KeyInfoX509Data IssuerSerials Eigenschaft eine X509IssuerSerial Struktur hinzufügen. Alternativ können Sie mithilfe der AddIssuerSerial Methode Zeichenfolgenwerte hinzufügen, die den eindeutigen Namen und das Seriennummernpaar des X.509-Zertifikatausgebers darstellen.
Weitere Informationen zum <X509IssuerSerial> Element finden Sie in der Spezifikation des World Wide Web Consortium (W3C).
Eigenschaften
| IssuerName |
Ruft den Distinguished Name eines X.509-Zertifikatsausstellers ab oder legt diesen fest. |
| SerialNumber |
Ruft die Seriennummer eines X.509-Zertifikatsausstellers ab oder legt diese fest. |