SignedXml.CheckSignature 메서드
정의
중요
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속성이 Signature 확인되는지 여부를 결정합니다.
오버로드
| Name | Description |
|---|---|
| CheckSignature() |
속성이 서명의 Signature 공개 키를 사용하여 확인할지 여부를 결정합니다. |
| CheckSignature(AsymmetricAlgorithm) |
속성이 Signature 지정된 키를 확인하는지 여부를 확인합니다. |
| CheckSignature(KeyedHashAlgorithm) |
속성이 Signature 지정된 MAC(메시지 인증 코드) 알고리즘을 확인하는지 여부를 결정합니다. |
| CheckSignature(X509Certificate2, Boolean) |
속성이 Signature 지정된 X509Certificate2 개체를 확인하는지 여부와 인증서가 유효한지 여부를 선택적으로 확인합니다. |
CheckSignature()
속성이 서명의 Signature 공개 키를 사용하여 확인할지 여부를 결정합니다.
public:
bool CheckSignature();public bool CheckSignature();member this.CheckSignature : unit -> boolPublic Function CheckSignature () As Boolean반품
true 속성이 확인되면 .이 Signature 고, false그렇지 않으면 .입니다.
예외
SignatureAlgorithm 서명에 있는 공개 키의 속성이 속성과 SignatureMethod 일치하지 않습니다.
-또는-
서명 설명을 만들 수 없습니다.
-또는
해시 알고리즘을 만들 수 없습니다.
예제
다음 코드 예제에서는 봉투형 서명을 사용하여 전체 XML 문서에 서명하고 확인하는 방법을 보여줍니다.
//
// This example signs an XML file using an
// envelope signature. It then verifies the
// signed XML.
//
using System;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.Security.Cryptography.Xml;
using System.Text;
using System.Xml;
public class SignVerifyEnvelope
{
public static void Main(String[] args)
{
try
{
// Generate a signing key.
RSA Key = RSA.Create();
// 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", Key);
Console.WriteLine("XML file signed.");
// Verify the signature of the signed XML.
Console.WriteLine("Verifying signature...");
bool result = VerifyXmlFile("SignedExample.xml", Key);
// Display the results of the signature verification to
// the console.
if(result)
{
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. This method does not
// save the public key within the XML file. This file cannot be verified unless
// the verifying code has the key with which it was signed.
public static void SignXmlFile(string FileName, string SignedFileName, RSA Key)
{
// Create a new XML document.
XmlDocument doc = new XmlDocument();
// Load the passed XML file using its name.
doc.Load(new XmlTextReader(FileName));
// Create a SignedXml object.
SignedXml signedXml = new SignedXml(doc);
// Add the key to the SignedXml document.
signedXml.SigningKey = Key;
// 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);
// 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.
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 Name, RSA Key)
{
// Create a new XML document.
XmlDocument xmlDocument = new XmlDocument();
// Load the passed XML file into the document.
xmlDocument.Load(Name);
// 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(Key);
}
// Create example data to sign.
public static void CreateSomeXml(string 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.
XmlTextWriter xmltw = new XmlTextWriter(FileName, new UTF8Encoding(false));
document.WriteTo(xmltw);
xmltw.Close();
}
}
'
' This example signs an XML file using an
' envelope signature. It then verifies the
' signed XML.
'
Imports System.Security.Cryptography
Imports System.Security.Cryptography.X509Certificates
Imports System.Security.Cryptography.Xml
Imports System.Text
Imports System.Xml
Public Class SignVerifyEnvelope
Overloads Public Shared Sub Main(args() As [String])
Try
' Generate a signing key.
Dim Key As RSA = RSA.Create()
' 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", Key)
Console.WriteLine("XML file signed.")
' Verify the signature of the signed XML.
Console.WriteLine("Verifying signature...")
Dim result As Boolean = VerifyXmlFile("SignedExample.xml", Key)
' Display the results of the signature verification to
' the console.
If result 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. This method does not
' save the public key within the XML file. This file cannot be verified unless
' the verifying code has the key with which it was signed.
Public Shared Sub SignXmlFile(FileName As String, SignedFileName As String, Key As RSA)
' Create a new XML document.
Dim doc As New XmlDocument()
' Load the passed XML file using its 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 = Key
' 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)
' 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))
doc.WriteTo(xmltw)
xmltw.Close()
End Sub
' Verify the signature of an XML file against an asymmetric
' algorithm and return the result.
Public Shared Function VerifyXmlFile(Name As [String], Key As RSA) As [Boolean]
' Create a new XML document.
Dim xmlDocument As New XmlDocument()
' Load the passed XML file into the document.
xmlDocument.Load(Name)
' 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(Key)
End Function
' Create example data to sign.
Public Shared Sub CreateSomeXml(FileName As String)
' 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))
document.WriteTo(xmltw)
xmltw.Close()
End Sub
End Class
다음 코드 예제에서는 분리된 서명을 사용하여 URI(Uniform Resource Identifier) 주소 지정 가능 개체에 서명하고 확인하는 방법을 보여 줍니다.
//
// This example signs a file specified by a URI
// using a detached signature. It then verifies
// the signed XML.
//
using System;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.Text;
using System.Xml;
class XMLDSIGDetached
{
[STAThread]
static void Main(string[] args)
{
// The URI to sign.
string resourceToSign = "http://www.microsoft.com";
// The name of the file to which to save the XML signature.
string XmlFileName = "xmldsig.xml";
try
{
// Generate a signing key.
RSA Key = RSA.Create();
Console.WriteLine("Signing: {0}", resourceToSign);
// Sign the detached resourceand save the signature in an XML file.
SignDetachedResource(resourceToSign, XmlFileName, Key);
Console.WriteLine("XML Signature was successfully computed and saved to {0}.", XmlFileName);
// Verify the signature of the signed XML.
Console.WriteLine("Verifying signature...");
//Verify the XML signature in the XML file against the key.
bool result = VerifyDetachedSignature(XmlFileName, Key);
// Display the results of the signature verification to
// the console.
if(result)
{
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. This method does not
// save the public key within the XML file. This file cannot be verified unless
// the verifying code has the key with which it was signed.
public static void SignDetachedResource(string URIString, string XmlSigFileName, RSA Key)
{
// Create a SignedXml object.
SignedXml signedXml = new SignedXml();
// Assign the key to the SignedXml object.
signedXml.SigningKey = Key;
// Create a reference to be signed.
Reference reference = new Reference();
// Add the passed URI to the reference object.
reference.Uri = URIString;
// Add the reference to the SignedXml object.
signedXml.AddReference(reference);
// Compute the signature.
signedXml.ComputeSignature();
// Get the XML representation of the signature and save
// it to an XmlElement object.
XmlElement xmlDigitalSignature = signedXml.GetXml();
// Save the signed XML document to a file specified
// using the passed string.
XmlTextWriter xmltw = new XmlTextWriter(XmlSigFileName, new UTF8Encoding(false));
xmlDigitalSignature.WriteTo(xmltw);
xmltw.Close();
}
// Verify the signature of an XML file against an asymmetric
// algorithm and return the result.
public static Boolean VerifyDetachedSignature(string XmlSigFileName, RSA Key)
{
// Create a new XML document.
XmlDocument xmlDocument = new XmlDocument();
// Load the passedXML file into the document.
xmlDocument.Load(XmlSigFileName);
// Create a new SignedXml object.
SignedXml signedXml = new SignedXml();
// 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 against the passed asymmetric key
// and return the result.
return signedXml.CheckSignature(Key);
}
}
'
' This example signs a file specified by a URI
' using a detached signature. It then verifies
' the signed XML.
'
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml
Imports System.Text
Imports System.Xml
Class XMLDSIGDetached
<STAThread()> _
Overloads Shared Sub Main(args() As String)
' The URI to sign.
Dim resourceToSign As String = "http://www.microsoft.com"
' The name of the file to which to save the XML signature.
Dim XmlFileName As String = "xmldsig.xml"
Try
' Generate a signing key.
Dim Key As RSA = RSA.Create()
Console.WriteLine("Signing: {0}", resourceToSign)
' Sign the detached resourceand save the signature in an XML file.
SignDetachedResource(resourceToSign, XmlFileName, Key)
Console.WriteLine("XML Signature was successfully computed and saved to {0}.", XmlFileName)
' Verify the signature of the signed XML.
Console.WriteLine("Verifying signature...")
'Verify the XML signature in the XML file against the key.
Dim result As Boolean = VerifyDetachedSignature(XmlFileName, Key)
' Display the results of the signature verification to
' the console.
If result 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. This method does not
' save the public key within the XML file. This file cannot be verified unless
' the verifying code has the key with which it was signed.
Public Shared Sub SignDetachedResource(URIString As String, XmlSigFileName As String, Key As RSA)
' Create a SignedXml object.
Dim signedXml As New SignedXml()
' Assign the key to the SignedXml object.
signedXml.SigningKey = Key
' Create a reference to be signed.
Dim reference As New Reference()
' Add the passed URI to the reference object.
reference.Uri = URIString
' Add the reference to the SignedXml object.
signedXml.AddReference(reference)
' 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()
' Save the signed XML document to a file specified
' using the passed string.
Dim xmltw As New XmlTextWriter(XmlSigFileName, New UTF8Encoding(False))
xmlDigitalSignature.WriteTo(xmltw)
xmltw.Close()
End Sub
' Verify the signature of an XML file against an asymmetric
' algorithm and return the result.
Public Shared Function VerifyDetachedSignature(XmlSigFileName As String, Key As RSA) As [Boolean]
' Create a new XML document.
Dim xmlDocument As New XmlDocument()
' Load the passedXML file into the document.
xmlDocument.Load(XmlSigFileName)
' Create a new SignedXml object.
Dim signedXml As New SignedXml()
' 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 against the passed asymmetric key
' and return the result.
Return signedXml.CheckSignature(Key)
End Function
End Class
다음 코드 예제에서는 인벨로핑 서명을 사용하여 XML 문서의 단일 요소에 서명하고 확인하는 방법을 보여줍니다.
//
// This example signs an XML file using an
// envelope signature. It then verifies the
// signed XML.
//
using System;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.Text;
using System.Xml;
public class SignVerifyEnvelope
{
public static void Main(String[] args)
{
// Generate a signing key.
RSA Key = RSA.Create();
try
{
// Specify an element to sign.
string[] elements = { "#tag1" };
// Sign an XML file and save the signature to a
// new file.
SignXmlFile("Test.xml", "SignedExample.xml", Key, elements);
Console.WriteLine("XML file signed.");
// Verify the signature of the signed XML.
Console.WriteLine("Verifying signature...");
bool result = VerifyXmlFile("SignedExample.xml");
// Display the results of the signature verification to
// the console.
if (result)
{
Console.WriteLine("The XML signature is valid.");
}
else
{
Console.WriteLine("The XML signature is not valid.");
}
}
catch (CryptographicException e)
{
Console.WriteLine(e.Message);
}
finally
{
// Clear resources associated with the
// RSA instance.
Key.Clear();
}
}
// Sign an XML file and save the signature in a new file.
public static void SignXmlFile(string FileName, string SignedFileName, RSA Key, string[] ElementsToSign)
{
// Check the arguments.
if (FileName == null)
throw new ArgumentNullException("FileName");
if (SignedFileName == null)
throw new ArgumentNullException("SignedFileName");
if (Key == null)
throw new ArgumentNullException("Key");
if (ElementsToSign == null)
throw new ArgumentNullException("ElementsToSign");
// 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 = Key;
// Loop through each passed element to sign
// and create a reference.
foreach (string s in ElementsToSign)
{
// Create a reference to be signed.
Reference reference = new Reference();
reference.Uri = s;
// Add an enveloped transformation to the reference.
XmlDsigEnvelopedSignatureTransform env = new XmlDsigEnvelopedSignatureTransform();
reference.AddTransform(env);
// Add the reference to the SignedXml object.
signedXml.AddReference(reference);
}
// Add an RSAKeyValue KeyInfo (optional; helps recipient find key to validate).
KeyInfo keyInfo = new KeyInfo();
keyInfo.AddClause(new RSAKeyValue((RSA)Key));
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.
XmlTextWriter xmltw = new XmlTextWriter(SignedFileName, new UTF8Encoding(false));
doc.WriteTo(xmltw);
xmltw.Close();
}
// Verify the signature of an XML file and return the result.
public static Boolean VerifyXmlFile(String Name)
{
// Check the arguments.
if (Name == null)
throw new ArgumentNullException("Name");
// Create a new XML document.
XmlDocument xmlDocument = new XmlDocument();
// Format using white spaces.
xmlDocument.PreserveWhitespace = true;
// Load the passed XML file into the document.
xmlDocument.Load(Name);
// 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();
}
}
' This example signs an XML file using an
' envelope signature. It then verifies the
' signed XML.
'
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml
Imports System.Text
Imports System.Xml
Module SignVerifyEnvelope
Sub Main(ByVal args() As String)
' Generate a signing key.
Dim Key As RSA = RSA.Create()
Try
' Specify an element to sign.
Dim elements As String() = New String() {"#tag1"}
' Sign an XML file and save the signature to a
' new file.
SignXmlFile("Test.xml", "SignedExample.xml", Key, elements)
Console.WriteLine("XML file signed.")
' Verify the signature of the signed XML.
Console.WriteLine("Verifying signature...")
Dim result As Boolean = VerifyXmlFile("SignedExample.xml")
' Display the results of the signature verification to \
' the console.
If result 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)
Finally
' Clear resources associated with the
' RSA instance.
Key.Clear()
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 Key As RSA, ByVal ElementsToSign() As String)
' Check the arguments.
If FileName Is Nothing Then
Throw New ArgumentNullException("FileName")
End If
If SignedFileName Is Nothing Then
Throw New ArgumentNullException("SignedFileName")
End If
If Key Is Nothing Then
Throw New ArgumentNullException("Key")
End If
If ElementsToSign Is Nothing Then
Throw New ArgumentNullException("ElementsToSign")
End If
' 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 = Key
' Loop through each passed element to sign
' and create a reference.
Dim s As String
For Each s In ElementsToSign
' Create a reference to be signed.
Dim reference As New Reference()
reference.Uri = s
' 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)
Next s
' Add an RSAKeyValue KeyInfo (optional; helps recipient find key to validate).
Dim keyInfo As New KeyInfo()
keyInfo.AddClause(New RSAKeyValue(CType(Key, RSA)))
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))
doc.WriteTo(xmltw)
xmltw.Close()
End Sub
' Verify the signature of an XML file and return the result.
Function VerifyXmlFile(ByVal Name As String) As [Boolean]
' Check the arguments.
If Name Is Nothing Then
Throw New ArgumentNullException("Name")
End If
' Create a new XML document.
Dim xmlDocument As New XmlDocument()
' Format using white spaces.
xmlDocument.PreserveWhitespace = True
' Load the passed XML file into the document.
xmlDocument.Load(Name)
' 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()
End Function
End Module
설명
또한 이 메서드는 참조의 다이제스트와 서명 값을 계산합니다.
XML 문서가 X.509 서명 CheckSignature 으로 서명된 경우 메서드는 "AddressBook" 저장소에서 확인에 적합한 인증서를 검색합니다. 예를 들어 SKI(주체 키 식별자) CheckSignature 에서 인증서를 참조하는 경우 메서드는 이 SKI를 사용하여 인증서를 선택하고 인증서를 확인할 수 있을 때까지 하나씩 시도합니다.
적용 대상
CheckSignature(AsymmetricAlgorithm)
속성이 Signature 지정된 키를 확인하는지 여부를 확인합니다.
public:
bool CheckSignature(System::Security::Cryptography::AsymmetricAlgorithm ^ key);public bool CheckSignature(System.Security.Cryptography.AsymmetricAlgorithm key);member this.CheckSignature : System.Security.Cryptography.AsymmetricAlgorithm -> boolPublic Function CheckSignature (key As AsymmetricAlgorithm) As Boolean매개 변수
속성을 확인하는 데 사용할 키를 보유하는 속성의 구현 AsymmetricAlgorithm 입니다 Signature .
반품
예외
매개 변수는 key .입니다 null.
SignatureAlgorithm 매개 변수의 속성이 key 속성과 SignatureMethod 일치하지 않습니다.
-또는-
서명 설명을 만들 수 없습니다.
-또는
해시 알고리즘을 만들 수 없습니다.
예제
다음 코드 예제에서는 분리된 서명을 사용하여 URI(Uniform Resource Identifier) 주소 지정 가능 개체에 서명하고 확인하는 방법을 보여 줍니다.
//
// This example signs a file specified by a URI
// using a detached signature. It then verifies
// the signed XML.
//
using System;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.Text;
using System.Xml;
class XMLDSIGDetached
{
[STAThread]
static void Main(string[] args)
{
// The URI to sign.
string resourceToSign = "http://www.microsoft.com";
// The name of the file to which to save the XML signature.
string XmlFileName = "xmldsig.xml";
try
{
// Generate a signing key.
RSA Key = RSA.Create();
Console.WriteLine("Signing: {0}", resourceToSign);
// Sign the detached resourceand save the signature in an XML file.
SignDetachedResource(resourceToSign, XmlFileName, Key);
Console.WriteLine("XML Signature was successfully computed and saved to {0}.", XmlFileName);
// Verify the signature of the signed XML.
Console.WriteLine("Verifying signature...");
//Verify the XML signature in the XML file against the key.
bool result = VerifyDetachedSignature(XmlFileName, Key);
// Display the results of the signature verification to
// the console.
if(result)
{
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. This method does not
// save the public key within the XML file. This file cannot be verified unless
// the verifying code has the key with which it was signed.
public static void SignDetachedResource(string URIString, string XmlSigFileName, RSA Key)
{
// Create a SignedXml object.
SignedXml signedXml = new SignedXml();
// Assign the key to the SignedXml object.
signedXml.SigningKey = Key;
// Create a reference to be signed.
Reference reference = new Reference();
// Add the passed URI to the reference object.
reference.Uri = URIString;
// Add the reference to the SignedXml object.
signedXml.AddReference(reference);
// Compute the signature.
signedXml.ComputeSignature();
// Get the XML representation of the signature and save
// it to an XmlElement object.
XmlElement xmlDigitalSignature = signedXml.GetXml();
// Save the signed XML document to a file specified
// using the passed string.
XmlTextWriter xmltw = new XmlTextWriter(XmlSigFileName, new UTF8Encoding(false));
xmlDigitalSignature.WriteTo(xmltw);
xmltw.Close();
}
// Verify the signature of an XML file against an asymmetric
// algorithm and return the result.
public static Boolean VerifyDetachedSignature(string XmlSigFileName, RSA Key)
{
// Create a new XML document.
XmlDocument xmlDocument = new XmlDocument();
// Load the passedXML file into the document.
xmlDocument.Load(XmlSigFileName);
// Create a new SignedXml object.
SignedXml signedXml = new SignedXml();
// 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 against the passed asymmetric key
// and return the result.
return signedXml.CheckSignature(Key);
}
}
'
' This example signs a file specified by a URI
' using a detached signature. It then verifies
' the signed XML.
'
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml
Imports System.Text
Imports System.Xml
Class XMLDSIGDetached
<STAThread()> _
Overloads Shared Sub Main(args() As String)
' The URI to sign.
Dim resourceToSign As String = "http://www.microsoft.com"
' The name of the file to which to save the XML signature.
Dim XmlFileName As String = "xmldsig.xml"
Try
' Generate a signing key.
Dim Key As RSA = RSA.Create()
Console.WriteLine("Signing: {0}", resourceToSign)
' Sign the detached resourceand save the signature in an XML file.
SignDetachedResource(resourceToSign, XmlFileName, Key)
Console.WriteLine("XML Signature was successfully computed and saved to {0}.", XmlFileName)
' Verify the signature of the signed XML.
Console.WriteLine("Verifying signature...")
'Verify the XML signature in the XML file against the key.
Dim result As Boolean = VerifyDetachedSignature(XmlFileName, Key)
' Display the results of the signature verification to
' the console.
If result 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. This method does not
' save the public key within the XML file. This file cannot be verified unless
' the verifying code has the key with which it was signed.
Public Shared Sub SignDetachedResource(URIString As String, XmlSigFileName As String, Key As RSA)
' Create a SignedXml object.
Dim signedXml As New SignedXml()
' Assign the key to the SignedXml object.
signedXml.SigningKey = Key
' Create a reference to be signed.
Dim reference As New Reference()
' Add the passed URI to the reference object.
reference.Uri = URIString
' Add the reference to the SignedXml object.
signedXml.AddReference(reference)
' 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()
' Save the signed XML document to a file specified
' using the passed string.
Dim xmltw As New XmlTextWriter(XmlSigFileName, New UTF8Encoding(False))
xmlDigitalSignature.WriteTo(xmltw)
xmltw.Close()
End Sub
' Verify the signature of an XML file against an asymmetric
' algorithm and return the result.
Public Shared Function VerifyDetachedSignature(XmlSigFileName As String, Key As RSA) As [Boolean]
' Create a new XML document.
Dim xmlDocument As New XmlDocument()
' Load the passedXML file into the document.
xmlDocument.Load(XmlSigFileName)
' Create a new SignedXml object.
Dim signedXml As New SignedXml()
' 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 against the passed asymmetric key
' and return the result.
Return signedXml.CheckSignature(Key)
End Function
End Class
다음 코드 예제에서는 봉투형 서명을 사용하여 전체 XML 문서에 서명하고 확인하는 방법을 보여줍니다.
//
// This example signs an XML file using an
// envelope signature. It then verifies the
// signed XML.
//
using System;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.Security.Cryptography.Xml;
using System.Text;
using System.Xml;
public class SignVerifyEnvelope
{
public static void Main(String[] args)
{
try
{
// Generate a signing key.
RSA Key = RSA.Create();
// 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", Key);
Console.WriteLine("XML file signed.");
// Verify the signature of the signed XML.
Console.WriteLine("Verifying signature...");
bool result = VerifyXmlFile("SignedExample.xml", Key);
// Display the results of the signature verification to
// the console.
if(result)
{
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. This method does not
// save the public key within the XML file. This file cannot be verified unless
// the verifying code has the key with which it was signed.
public static void SignXmlFile(string FileName, string SignedFileName, RSA Key)
{
// Create a new XML document.
XmlDocument doc = new XmlDocument();
// Load the passed XML file using its name.
doc.Load(new XmlTextReader(FileName));
// Create a SignedXml object.
SignedXml signedXml = new SignedXml(doc);
// Add the key to the SignedXml document.
signedXml.SigningKey = Key;
// 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);
// 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.
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 Name, RSA Key)
{
// Create a new XML document.
XmlDocument xmlDocument = new XmlDocument();
// Load the passed XML file into the document.
xmlDocument.Load(Name);
// 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(Key);
}
// Create example data to sign.
public static void CreateSomeXml(string 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.
XmlTextWriter xmltw = new XmlTextWriter(FileName, new UTF8Encoding(false));
document.WriteTo(xmltw);
xmltw.Close();
}
}
'
' This example signs an XML file using an
' envelope signature. It then verifies the
' signed XML.
'
Imports System.Security.Cryptography
Imports System.Security.Cryptography.X509Certificates
Imports System.Security.Cryptography.Xml
Imports System.Text
Imports System.Xml
Public Class SignVerifyEnvelope
Overloads Public Shared Sub Main(args() As [String])
Try
' Generate a signing key.
Dim Key As RSA = RSA.Create()
' 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", Key)
Console.WriteLine("XML file signed.")
' Verify the signature of the signed XML.
Console.WriteLine("Verifying signature...")
Dim result As Boolean = VerifyXmlFile("SignedExample.xml", Key)
' Display the results of the signature verification to
' the console.
If result 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. This method does not
' save the public key within the XML file. This file cannot be verified unless
' the verifying code has the key with which it was signed.
Public Shared Sub SignXmlFile(FileName As String, SignedFileName As String, Key As RSA)
' Create a new XML document.
Dim doc As New XmlDocument()
' Load the passed XML file using its 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 = Key
' 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)
' 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))
doc.WriteTo(xmltw)
xmltw.Close()
End Sub
' Verify the signature of an XML file against an asymmetric
' algorithm and return the result.
Public Shared Function VerifyXmlFile(Name As [String], Key As RSA) As [Boolean]
' Create a new XML document.
Dim xmlDocument As New XmlDocument()
' Load the passed XML file into the document.
xmlDocument.Load(Name)
' 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(Key)
End Function
' Create example data to sign.
Public Shared Sub CreateSomeXml(FileName As String)
' 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))
document.WriteTo(xmltw)
xmltw.Close()
End Sub
End Class
적용 대상
CheckSignature(KeyedHashAlgorithm)
속성이 Signature 지정된 MAC(메시지 인증 코드) 알고리즘을 확인하는지 여부를 결정합니다.
public:
bool CheckSignature(System::Security::Cryptography::KeyedHashAlgorithm ^ macAlg);public bool CheckSignature(System.Security.Cryptography.KeyedHashAlgorithm macAlg);member this.CheckSignature : System.Security.Cryptography.KeyedHashAlgorithm -> boolPublic Function CheckSignature (macAlg As KeyedHashAlgorithm) As Boolean매개 변수
- macAlg
- KeyedHashAlgorithm
해당 구현 KeyedHashAlgorithm 은 속성을 확인하는 데 사용할 MAC를 보유합니다 Signature .
반품
true 속성이 Signature 지정된 MAC에 대해 확인되면 .이고, false그렇지 않으면 .입니다.
예외
매개 변수는 macAlg .입니다 null.
HashSize 지정한 KeyedHashAlgorithm 개체의 속성이 잘못되었습니다.
-또는-
Signature 속성은 null입니다.
-또는-
서명을 확인하는 데 사용되는 암호화 변환을 만들 수 없습니다.
예제
다음 코드 예제에서는 분리된 서명을 사용하여 URI(Uniform Resource Identifier) 주소 지정 가능 개체에 서명하고 확인하는 방법을 보여 줍니다.
//
// This example signs a file specified by a URI
// using a detached signature. It then verifies
// the signed XML.
//
using System;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.Text;
using System.Xml;
class XMLDSIGDetached
{
[STAThread]
static void Main(string[] args)
{
try
{
// The URI to sign.
string resourceToSign = "http://www.microsoft.com";
// The name of the file to which to save the XML signature.
string XmlFileName = "xmlsig.xml";
// Generate a signing key.
HMACSHA256 Key = new HMACSHA256();
Console.WriteLine("Signing: {0}", resourceToSign);
// Sign the detached resourceand save the signature in an XML file.
SignDetachedResource(resourceToSign, XmlFileName, Key);
Console.WriteLine("XML signature was successfully computed and saved to {0}.", XmlFileName);
// Verify the signature of the signed XML.
Console.WriteLine("Verifying signature...");
//Verify the XML signature in the XML file.
bool result = VerifyDetachedSignature(XmlFileName, Key);
// Display the results of the signature verification to
// the console.
if(result)
{
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 SignDetachedResource(string URIString, string XmlSigFileName, KeyedHashAlgorithm Key)
{
// Create a SignedXml object.
SignedXml signedXml = new SignedXml();
// Create a reference to be signed.
Reference reference = new Reference();
// Add the passed URI to the reference object.
reference.Uri = URIString;
// Add the reference to the SignedXml object.
signedXml.AddReference(reference);
// Compute the signature.
signedXml.ComputeSignature(Key);
// Get the XML representation of the signature and save
// it to an XmlElement object.
XmlElement xmlDigitalSignature = signedXml.GetXml();
// Save the signed XML document to a file specified
// using the passed string.
XmlTextWriter xmltw = new XmlTextWriter(XmlSigFileName, new UTF8Encoding(false));
xmlDigitalSignature.WriteTo(xmltw);
xmltw.Close();
}
// Verify the signature of an XML file and return the result.
public static Boolean VerifyDetachedSignature(string XmlSigFileName, KeyedHashAlgorithm Key)
{
// Create a new XML document.
XmlDocument xmlDocument = new XmlDocument();
// Load the passedXML file into the document.
xmlDocument.Load(XmlSigFileName);
// Create a new SignedXml object and pass it
// the XML document class.
SignedXml signedXml = new SignedXml();
// 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(Key);
}
}
'
' This example signs a file specified by a URI
' using a detached signature. It then verifies
' the signed XML.
'
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml
Imports System.Text
Imports System.Xml
Class XMLDSIGDetached
<STAThread()> _
Overloads Shared Sub Main(args() As String)
Try
' The URI to sign.
Dim resourceToSign As String = "http://www.microsoft.com"
' The name of the file to which to save the XML signature.
Dim XmlFileName As String = "xmlsig.xml"
' Generate a signing key.
Dim Key As New HMACSHA256()
Console.WriteLine("Signing: {0}", resourceToSign)
' Sign the detached resourceand save the signature in an XML file.
SignDetachedResource(resourceToSign, XmlFileName, Key)
Console.WriteLine("XML signature was successfully computed and saved to {0}.", XmlFileName)
' Verify the signature of the signed XML.
Console.WriteLine("Verifying signature...")
'Verify the XML signature in the XML file.
Dim result As Boolean = VerifyDetachedSignature(XmlFileName, Key)
' Display the results of the signature verification to
' the console.
If result 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.
Public Shared Sub SignDetachedResource(URIString As String, XmlSigFileName As String, Key As KeyedHashAlgorithm)
' Create a SignedXml object.
Dim signedXml As New SignedXml()
' Create a reference to be signed.
Dim reference As New Reference()
' Add the passed URI to the reference object.
reference.Uri = URIString
' Add the reference to the SignedXml object.
signedXml.AddReference(reference)
' Compute the signature.
signedXml.ComputeSignature(Key)
' Get the XML representation of the signature and save
' it to an XmlElement object.
Dim xmlDigitalSignature As XmlElement = signedXml.GetXml()
' Save the signed XML document to a file specified
' using the passed string.
Dim xmltw As New XmlTextWriter(XmlSigFileName, New UTF8Encoding(False))
xmlDigitalSignature.WriteTo(xmltw)
xmltw.Close()
End Sub
' Verify the signature of an XML file and return the result.
Public Shared Function VerifyDetachedSignature(XmlSigFileName As String, Key As KeyedHashAlgorithm) As [Boolean]
' Create a new XML document.
Dim xmlDocument As New XmlDocument()
' Load the passedXML file into the document.
xmlDocument.Load(XmlSigFileName)
' Create a new SignedXml object and pass it
' the XML document class.
Dim signedXml As New SignedXml()
' 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(Key)
End Function
End Class
다음 코드 예제에서는 인벨로핑 서명을 사용하여 전체 XML 문서에 서명하고 확인하는 방법을 보여줍니다.
//
// This example signs an XML file using an
// envelope signature. It then verifies the
// signed XML.
//
using System;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.Security.Cryptography.Xml;
using System.Text;
using System.Xml;
public class SignVerifyEnvelope
{
public static void Main(String[] args)
{
try
{
// Generate a signing key.
HMACSHA256 Key = new HMACSHA256();
// 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", Key);
Console.WriteLine("XML file signed.");
// Verify the signature of the signed XML.
Console.WriteLine("Verifying Signature...");
bool result = VerifyXmlFile("SignedExample.xml", Key);
// Display the results of the signature verification to \
// the console.
if(result)
{
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, KeyedHashAlgorithm Key)
{
// 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);
// 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);
// Compute the signature.
signedXml.ComputeSignature(Key);
// 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.
XmlTextWriter xmltw = new XmlTextWriter(SignedFileName, new UTF8Encoding(false));
doc.WriteTo(xmltw);
xmltw.Close();
}
// Verify the signature of an XML file and return the result.
public static Boolean VerifyXmlFile(String Name, KeyedHashAlgorithm Key)
{
// Create a new XML document.
XmlDocument xmlDocument = new XmlDocument();
// Format using white spaces.
xmlDocument.PreserveWhitespace = true;
// Load the passed XML file into the document.
xmlDocument.Load(Name);
// 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(Key);
}
// Create example data to sign.
public static void CreateSomeXml(string 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 filename specified.
XmlTextWriter xmltw = new XmlTextWriter(FileName, new UTF8Encoding(false));
document.WriteTo(xmltw);
xmltw.Close();
}
}
'
' This example signs an XML file using an
' envelope signature. It then verifies the
' signed XML.
'
Imports System.Security.Cryptography
Imports System.Security.Cryptography.X509Certificates
Imports System.Security.Cryptography.Xml
Imports System.Text
Imports System.Xml
Public Class SignVerifyEnvelope
Overloads Public Shared Sub Main(args() As [String])
Try
' Generate a signing key.
Dim Key As New HMACSHA256()
' 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", Key)
Console.WriteLine("XML file signed.")
' Verify the signature of the signed XML.
Console.WriteLine("Verifying Signature...")
Dim result As Boolean = VerifyXmlFile("SignedExample.xml", Key)
' Display the results of the signature verification to \
' the console.
If result 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.
Public Shared Sub SignXmlFile(FileName As String, SignedFileName As String, Key As KeyedHashAlgorithm)
' 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)
' 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)
' Compute the signature.
signedXml.ComputeSignature(Key)
' 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))
doc.WriteTo(xmltw)
xmltw.Close()
End Sub
' Verify the signature of an XML file and return the result.
Public Shared Function VerifyXmlFile(Name As [String], Key As KeyedHashAlgorithm) As [Boolean]
' Create a new XML document.
Dim xmlDocument As New XmlDocument()
' Format using white spaces.
xmlDocument.PreserveWhitespace = True
' Load the passed XML file into the document.
xmlDocument.Load(Name)
' 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(Key)
End Function
' Create example data to sign.
Public Shared Sub CreateSomeXml(FileName As String)
' 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 filename specified.
Dim xmltw As New XmlTextWriter(FileName, New UTF8Encoding(False))
document.WriteTo(xmltw)
xmltw.Close()
End Sub
End Class
적용 대상
CheckSignature(X509Certificate2, Boolean)
속성이 Signature 지정된 X509Certificate2 개체를 확인하는지 여부와 인증서가 유효한지 여부를 선택적으로 확인합니다.
public:
bool CheckSignature(System::Security::Cryptography::X509Certificates::X509Certificate2 ^ certificate, bool verifySignatureOnly);[System.Runtime.InteropServices.ComVisible(false)]
public bool CheckSignature(System.Security.Cryptography.X509Certificates.X509Certificate2 certificate, bool verifySignatureOnly);[<System.Runtime.InteropServices.ComVisible(false)>]
member this.CheckSignature : System.Security.Cryptography.X509Certificates.X509Certificate2 * bool -> boolPublic Function CheckSignature (certificate As X509Certificate2, verifySignatureOnly As Boolean) As Boolean매개 변수
- certificate
- X509Certificate2
X509Certificate2 속성을 확인하는 데 사용할 개체입니다Signature.
- verifySignatureOnly
- Boolean
true 서명만 확인하려면 입니다. false 서명과 인증서를 모두 확인합니다.
반품
true서명이 유효한 경우 그렇지 않으면 . false
-또는-
true서명 및 인증서가 유효하면 이고, 그렇지 않으면 . false
- 특성
예외
매개 변수는 certificate .입니다 null.
매개 변수에 대한 certificate 서명 설명을 만들 수 없습니다.
예제
다음 코드 예제에서는 인증서 저장소의 X.509 인증서를 사용하여 XML 문서에 서명하고 확인합니다.
//
// 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.
keyInfo.AddClause(new KeyInfoX509Data(cert));
// 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.
keyInfo.AddClause(New KeyInfoX509Data(cert))
' 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.
설명
.NET Framework 버전 1.1에서는 X.509 인증서가 확인되지 않습니다. 버전 2.0 이상에서는 X.509 인증서가 확인됩니다.
.NET Framework 버전 2.0 이상에서 CheckSignature 메서드는 "AddressBook" 저장소에서 확인에 적합한 인증서를 검색합니다. 예를 들어 SKI(주체 키 식별자) CheckSignature 에서 인증서를 참조하는 경우 메서드는 이 SKI를 사용하여 인증서를 선택하고 인증서를 확인할 수 있을 때까지 하나씩 시도합니다.