DSAKeyValue クラス
アセンブリ: System.Security (system.security.dll 内)


KeyInfo クラスは、DSA 公開キーを保持する <KeyInfo> 要素を表します。
デジタル署名の作成に使用された DSA 秘密キーに対応する公開キーを識別するには、DSAKeyValue を使用します。
キーがコンストラクタに明示的に提供されない場合は、新しい DSA キー ペアがランダムに生成されます。
DSAKeyValue クラスは、XML 署名と一緒に使用します。W3C 仕様の詳細については、http://www.w3.org/TR/xmldsig-core/ を参照してください。

XML 暗号化に DSAKeyValue クラスを使用してデタッチ シグネチャを作成する方法を次のコード例に示します。
' ' This example signs a file specified by a URI ' using a detached signature. It then verifies ' the signed XML. ' Imports System 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 DSA signing key. Dim DSAKey As New DSACryptoServiceProvider() Console.WriteLine("Signing: {0}", resourceToSign) ' Sign the detached resourceand save the signature in an XML file. SignDetachedResource(resourceToSign, XmlFileName, DSAKey) Console.WriteLine("XML signature was succesfully 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) ' 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, DSAKey As DSA) ' Create a SignedXml object. Dim signedXml As New SignedXml() ' Assign the DSA key to the SignedXml object. signedXml.SigningKey = DSAKey ' 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) ' Add a DSAKeyValue to the KeyInfo (optional; helps recipient find key to validate). Dim keyInfo As New KeyInfo() keyInfo.AddClause(New DSAKeyValue(CType(DSAKey, DSA))) 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() ' 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) As [Boolean] ' Create a new XML document. Dim xmlDocument As New XmlDocument() ' Load the passed XML 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 and return the result. Return signedXml.CheckSignature() End Function
// // 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 DSA signing key. DSACryptoServiceProvider DSAKey = new DSACryptoServiceProvider(); Console.WriteLine("Signing: {0}", resourceToSign); // Sign the detached resourceand save the signature in an XML file. SignDetachedResource(resourceToSign, XmlFileName, DSAKey); Console.WriteLine("XML signature was succesfully 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); // 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, DSA DSAKey) { // Create a SignedXml object. SignedXml signedXml = new SignedXml(); // Assign the DSA key to the SignedXml object. signedXml.SigningKey = DSAKey; // 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); // Add a DSAKeyValue to the KeyInfo (optional; helps recipient find key to validate). KeyInfo keyInfo = new KeyInfo(); keyInfo.AddClause(new DSAKeyValue((DSA)DSAKey)); 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(); // 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) { // Create a new XML document. XmlDocument xmlDocument = new XmlDocument(); // Load the passed XML 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 and return the result. return signedXml.CheckSignature(); } }
// // This example signs a file specified by a URI // using a detached signature. It then verifies // the signed XML. // #using <System.Security.dll> #using <System.Xml.dll> using namespace System; using namespace System::Security::Cryptography; using namespace System::Security::Cryptography::Xml; using namespace System::Text; using namespace System::Xml; // Sign an XML file and save the signature in a new file. void SignDetachedResource( String^ URIString, String^ XmlSigFileName, DSA^ DSAKey ) { // Create a SignedXml Object*. SignedXml^ signedXml = gcnew SignedXml; // Assign the DSA key to the SignedXml object. signedXml->SigningKey = DSAKey; // Create a reference to be signed. Reference^ reference = gcnew Reference; // Add the passed URI to the reference object. reference->Uri = URIString; // Add the reference to the SignedXml object. signedXml->AddReference( reference ); // Add a DSAKeyValue to the KeyInfo (optional; helps recipient find key to validate). KeyInfo^ keyInfo = gcnew KeyInfo; keyInfo->AddClause( gcnew DSAKeyValue( safe_cast<DSA^>(DSAKey) ) ); 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(); // Save the signed XML document to a file specified // using the passed string. XmlTextWriter^ xmltw = gcnew XmlTextWriter( XmlSigFileName,gcnew UTF8Encoding( false ) ); xmlDigitalSignature->WriteTo( xmltw ); xmltw->Close(); } // Verify the signature of an XML file and return the result. Boolean VerifyDetachedSignature( String^ XmlSigFileName ) { // Create a new XML document. XmlDocument^ xmlDocument = gcnew XmlDocument; // Load the passed XML file into the document. xmlDocument->Load( XmlSigFileName ); // Create a new SignedXMl object. SignedXml^ signedXml = gcnew SignedXml; // Find the S"Signature" node and create a new // XmlNodeList object. XmlNodeList^ nodeList = xmlDocument->GetElementsByTagName( "Signature" ); // Load the signature node. signedXml->LoadXml( safe_cast<XmlElement^>(nodeList->Item( 0 )) ); // Check the signature and return the result. return signedXml->CheckSignature(); } [STAThread] int main() { array<String^>^args = Environment::GetCommandLineArgs(); // 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 DSA signing key. DSACryptoServiceProvider^ DSAKey = gcnew DSACryptoServiceProvider; Console::WriteLine( "Signing: {0}", resourceToSign ); // Sign the detached resourceand save the signature in an XML file. SignDetachedResource( resourceToSign, XmlFileName, DSAKey ); Console::WriteLine( "XML signature was succesfully 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 ); // 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 ); } }
// // This example signs a file specified by a URI // using a detached signature. It then verifies // the signed XML. // import System.*; import System.Security.Cryptography.*; import System.Security.Cryptography.Xml.*; import System.Text.*; import System.Xml.*; class XMLDSIGDetached { /** @attribute STAThread() */ public 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 DSA signing key. DSACryptoServiceProvider dsaKey = new DSACryptoServiceProvider(); Console.WriteLine("Signing: {0}", resourceToSign); // Sign the detached resourceand save the signature in an XML file. SignDetachedResource(resourceToSign, xmlFileName, dsaKey); Console.WriteLine("XML signature was succesfully 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. boolean result = VerifyDetachedSignature(xmlFileName).booleanValue(); // 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.get_Message()); } } //main // Sign an XML file and save the signature in a new file. public static void SignDetachedResource(String uriString, String xmlSigFileName, DSA dsaKey) { // Create a SignedXml object. SignedXml signedXml = new SignedXml(); // Assign the DSA key to the SignedXml object. signedXml.set_SigningKey ( dsaKey); // Create a reference to be signed. Reference reference = new Reference(); // Add the passed URI to the reference object. reference.set_Uri ( uriString); // Add a transformation if the URI is an XML file. if (uriString.EndsWith("xml")) { reference.AddTransform(new XmlDsigC14NTransform()); } // Add the reference to the SignedXml object. signedXml.AddReference(reference); // Add a DSAKeyValue to the KeyInfo (optional; // helps recipient find key to validate). KeyInfo keyInfo = new KeyInfo(); keyInfo.AddClause(new DSAKeyValue(((DSA)(dsaKey)))); signedXml.set_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(); // 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(); } //SignDetachedResource // Verify the signature of an XML file and return the result. public static Boolean VerifyDetachedSignature(String xmlSigFileName) { // Create a new XML document. XmlDocument xmlDocument = new XmlDocument(); // Load the passed XML 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.get_ItemOf(0)))); // Check the signature and return the result. return new Boolean(signedXml.CheckSignature()) ; } //VerifyDetachedSignature } //XMLDSIGDetached
XML 暗号化に DSAKeyValue クラスを使用してエンベロープ シグネチャを作成する方法を次のコード例に示します。
' ' This example signs an XML file using an ' envelope signature. It then verifies the ' signed XML. ' Imports System Imports System.Security.Cryptography 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 DSA signing key. Dim DSAKey As New DSACryptoServiceProvider() ' 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", DSAKey) 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) 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, DSAKey As DSA) ' 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 DSA key to the SignedXml document. signedXml.SigningKey = DSAKey ' Create a reference to be signed. Dim reference As New Reference() reference.Uri = "" ' Add a transformation to the reference. Dim trns = New XmlDsigC14NTransform() reference.AddTransform(trns) ' 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) ' Add a DSAKeyValue to the KeyInfo (optional; helps recipient find key to validate). Dim keyInfo As New KeyInfo() keyInfo.AddClause(New DSAKeyValue(CType(DSAKey, DSA))) 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. Public Shared Function VerifyXmlFile(Name As [String]) 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() 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
// // 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) { try { // Generate a DSA signing key. DSACryptoServiceProvider DSAKey = new DSACryptoServiceProvider(); // 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", DSAKey); 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); } } // Sign an XML file and save the signature in a new file. public static void SignXmlFile(string FileName, string SignedFileName, DSA DSAKey) { // 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 DSA key to the SignedXml document. signedXml.SigningKey = DSAKey; // Create a reference to be signed. Reference reference = new Reference(); reference.Uri = ""; // Add a transformation to the reference. Transform trns = new XmlDsigC14NTransform(); reference.AddTransform(trns); // 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 a DSAKeyValue to the KeyInfo (optional; helps recipient find key to validate). KeyInfo keyInfo = new KeyInfo(); keyInfo.AddClause(new DSAKeyValue((DSA)DSAKey)); 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) { // 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(); } // 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. // #using <System.Security.dll> #using <System.Xml.dll> using namespace System; using namespace System::Security::Cryptography; using namespace System::Security::Cryptography::Xml; using namespace System::Text; using namespace System::Xml; // Sign an XML file and save the signature in a new file. void SignXmlFile( String^ FileName, String^ SignedFileName, DSA^ DSAKey ) { // Create a new XML document. XmlDocument^ doc = gcnew XmlDocument; // Format the document to ignore white spaces. doc->PreserveWhitespace = false; // Load the passed XML file using its name. doc->Load( gcnew XmlTextReader( FileName ) ); // Create a SignedXml object. SignedXml^ signedXml = gcnew SignedXml( doc ); // Add the DSA key to the SignedXml document. signedXml->SigningKey = DSAKey; // Create a reference to be signed. Reference^ reference = gcnew Reference; reference->Uri = ""; // Add a transformation to the reference. Transform^ trns = gcnew XmlDsigC14NTransform; reference->AddTransform( trns ); // Add an enveloped transformation to the reference. XmlDsigEnvelopedSignatureTransform^ env = gcnew XmlDsigEnvelopedSignatureTransform; reference->AddTransform( env ); // Add the reference to the SignedXml object. signedXml->AddReference( reference ); // Add a DSAKeyValue to the KeyInfo (optional; helps recipient find key to validate). KeyInfo^ keyInfo = gcnew KeyInfo; keyInfo->AddClause( gcnew DSAKeyValue( safe_cast<DSA^>(DSAKey) ) ); 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)->GetType() == XmlDeclaration::typeid ) { doc->RemoveChild( doc->FirstChild ); } // Save the signed XML document to a file specified // using the passed string. XmlTextWriter^ xmltw = gcnew XmlTextWriter( SignedFileName,gcnew UTF8Encoding( false ) ); doc->WriteTo( xmltw ); xmltw->Close(); } // Verify the signature of an XML file and return the result. Boolean VerifyXmlFile( String^ Name ) { // Create a new XML document. XmlDocument^ xmlDocument = gcnew 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 = gcnew SignedXml( xmlDocument ); // Find the "Signature" node and create a new // XmlNodeList object. XmlNodeList^ nodeList = xmlDocument->GetElementsByTagName( "Signature" ); // Load the signature node. signedXml->LoadXml( safe_cast<XmlElement^>(nodeList->Item( 0 )) ); // Check the signature and return the result. return signedXml->CheckSignature(); } // Create example data to sign. void CreateSomeXml( String^ FileName ) { // Create a new XmlDocument object. XmlDocument^ document = gcnew 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 = gcnew XmlTextWriter( FileName,gcnew UTF8Encoding( false ) ); document->WriteTo( xmltw ); xmltw->Close(); } int main() { try { // Generate a DSA signing key. DSACryptoServiceProvider^ DSAKey = gcnew DSACryptoServiceProvider; // 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", DSAKey ); 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 ); } }

System.Security.Cryptography.Xml.KeyInfoClause
System.Security.Cryptography.Xml.DSAKeyValue


Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


DSAKeyValue コンストラクタ ()
アセンブリ: System.Security (system.security.dll 内)



Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


DSAKeyValue コンストラクタ (DSA)
アセンブリ: System.Security (system.security.dll 内)


XML 暗号化における DSAKeyValue クラスの使用方法を次のコード例に示します。
' Sign an XML file and save the signature in a new file. Public Shared Sub SignDetachedResource(URIString As String, XmlSigFileName As String, DSAKey As DSA) ' Create a SignedXml object. Dim signedXml As New SignedXml() ' Assign the DSA key to the SignedXml object. signedXml.SigningKey = DSAKey ' 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) ' Add a DSAKeyValue to the KeyInfo (optional; helps recipient find key to validate). Dim keyInfo As New KeyInfo() keyInfo.AddClause(New DSAKeyValue(CType(DSAKey, DSA))) 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() ' 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
// Sign an XML file and save the signature in a new file. public static void SignDetachedResource(string URIString, string XmlSigFileName, DSA DSAKey) { // Create a SignedXml object. SignedXml signedXml = new SignedXml(); // Assign the DSA key to the SignedXml object. signedXml.SigningKey = DSAKey; // 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); // Add a DSAKeyValue to the KeyInfo (optional; helps recipient find key to validate). KeyInfo keyInfo = new KeyInfo(); keyInfo.AddClause(new DSAKeyValue((DSA)DSAKey)); 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(); // 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(); }
// Sign an XML file and save the signature in a new file. void SignDetachedResource( String^ URIString, String^ XmlSigFileName, DSA^ DSAKey ) { // Create a SignedXml Object*. SignedXml^ signedXml = gcnew SignedXml; // Assign the DSA key to the SignedXml object. signedXml->SigningKey = DSAKey; // Create a reference to be signed. Reference^ reference = gcnew Reference; // Add the passed URI to the reference object. reference->Uri = URIString; // Add the reference to the SignedXml object. signedXml->AddReference( reference ); // Add a DSAKeyValue to the KeyInfo (optional; helps recipient find key to validate). KeyInfo^ keyInfo = gcnew KeyInfo; keyInfo->AddClause( gcnew DSAKeyValue( safe_cast<DSA^>(DSAKey) ) ); 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(); // Save the signed XML document to a file specified // using the passed string. XmlTextWriter^ xmltw = gcnew XmlTextWriter( XmlSigFileName,gcnew UTF8Encoding( false ) ); xmlDigitalSignature->WriteTo( xmltw ); xmltw->Close(); }
// Sign an XML file and save the signature in a new file. public static void SignDetachedResource(String uriString, String xmlSigFileName, DSA dsaKey) { // Create a SignedXml object. SignedXml signedXml = new SignedXml(); // Assign the DSA key to the SignedXml object. signedXml.set_SigningKey ( dsaKey); // Create a reference to be signed. Reference reference = new Reference(); // Add the passed URI to the reference object. reference.set_Uri ( uriString); // Add a transformation if the URI is an XML file. if (uriString.EndsWith("xml")) { reference.AddTransform(new XmlDsigC14NTransform()); } // Add the reference to the SignedXml object. signedXml.AddReference(reference); // Add a DSAKeyValue to the KeyInfo (optional; // helps recipient find key to validate). KeyInfo keyInfo = new KeyInfo(); keyInfo.AddClause(new DSAKeyValue(((DSA)(dsaKey)))); signedXml.set_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(); // 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(); } //SignDetachedResource
' Sign an XML file and save the signature in a new file. Public Shared Sub SignXmlFile(FileName As String, SignedFileName As String, DSAKey As DSA) ' 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 DSA key to the SignedXml document. signedXml.SigningKey = DSAKey ' Create a reference to be signed. Dim reference As New Reference() reference.Uri = "" ' Add a transformation to the reference. Dim trns = New XmlDsigC14NTransform() reference.AddTransform(trns) ' 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) ' Add a DSAKeyValue to the KeyInfo (optional; helps recipient find key to validate). Dim keyInfo As New KeyInfo() keyInfo.AddClause(New DSAKeyValue(CType(DSAKey, DSA))) 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
// Sign an XML file and save the signature in a new file. public static void SignXmlFile(string FileName, string SignedFileName, DSA DSAKey) { // 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 DSA key to the SignedXml document. signedXml.SigningKey = DSAKey; // Create a reference to be signed. Reference reference = new Reference(); reference.Uri = ""; // Add a transformation to the reference. Transform trns = new XmlDsigC14NTransform(); reference.AddTransform(trns); // 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 a DSAKeyValue to the KeyInfo (optional; helps recipient find key to validate). KeyInfo keyInfo = new KeyInfo(); keyInfo.AddClause(new DSAKeyValue((DSA)DSAKey)); 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(); }
// Sign an XML file and save the signature in a new file. void SignXmlFile( String^ FileName, String^ SignedFileName, DSA^ DSAKey ) { // Create a new XML document. XmlDocument^ doc = gcnew XmlDocument; // Format the document to ignore white spaces. doc->PreserveWhitespace = false; // Load the passed XML file using its name. doc->Load( gcnew XmlTextReader( FileName ) ); // Create a SignedXml object. SignedXml^ signedXml = gcnew SignedXml( doc ); // Add the DSA key to the SignedXml document. signedXml->SigningKey = DSAKey; // Create a reference to be signed. Reference^ reference = gcnew Reference; reference->Uri = ""; // Add a transformation to the reference. Transform^ trns = gcnew XmlDsigC14NTransform; reference->AddTransform( trns ); // Add an enveloped transformation to the reference. XmlDsigEnvelopedSignatureTransform^ env = gcnew XmlDsigEnvelopedSignatureTransform; reference->AddTransform( env ); // Add the reference to the SignedXml object. signedXml->AddReference( reference ); // Add a DSAKeyValue to the KeyInfo (optional; helps recipient find key to validate). KeyInfo^ keyInfo = gcnew KeyInfo; keyInfo->AddClause( gcnew DSAKeyValue( safe_cast<DSA^>(DSAKey) ) ); 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)->GetType() == XmlDeclaration::typeid ) { doc->RemoveChild( doc->FirstChild ); } // Save the signed XML document to a file specified // using the passed string. XmlTextWriter^ xmltw = gcnew XmlTextWriter( SignedFileName,gcnew UTF8Encoding( false ) ); doc->WriteTo( xmltw ); xmltw->Close(); }

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


DSAKeyValue コンストラクタ

名前 | 説明 |
---|---|
DSAKeyValue () | ランダムに生成された新しい DSA 公開キーを使用して、DSAKeyValue クラスの新しいインスタンスを初期化します。 |
DSAKeyValue (DSA) | 指定した DSA 公開キーを使用して、DSAKeyValue クラスの新しいインスタンスを初期化します。 |

DSAKeyValue プロパティ
DSAKeyValue メソッド

名前 | 説明 | |
---|---|---|
![]() | Equals | オーバーロードされます。 2 つの Object インスタンスが等しいかどうかを判断します。 ( Object から継承されます。) |
![]() | GetHashCode | 特定の型のハッシュ関数として機能します。GetHashCode は、ハッシュ アルゴリズムや、ハッシュ テーブルのようなデータ構造での使用に適しています。 ( Object から継承されます。) |
![]() | GetType | 現在のインスタンスの Type を取得します。 ( Object から継承されます。) |
![]() | GetXml | オーバーライドされます。 DSAKeyValue 要素の XML 表現を返します。 |
![]() | LoadXml | オーバーライドされます。 XML 要素から DSAKeyValue の状態を読み込みます。 |
![]() | ReferenceEquals | 指定した複数の Object インスタンスが同一かどうかを判断します。 ( Object から継承されます。) |
![]() | ToString | 現在の Object を表す String を返します。 ( Object から継承されます。) |

名前 | 説明 | |
---|---|---|
![]() | Finalize | Object がガベージ コレクションにより収集される前に、その Object がリソースを解放し、その他のクリーンアップ操作を実行できるようにします。 ( Object から継承されます。) |
![]() | MemberwiseClone | 現在の Object の簡易コピーを作成します。 ( Object から継承されます。) |

DSAKeyValue メンバ
DSAKeyValue データ型で公開されるメンバを以下の表に示します。



名前 | 説明 | |
---|---|---|
![]() | Equals | オーバーロードされます。 2 つの Object インスタンスが等しいかどうかを判断します。 (Object から継承されます。) |
![]() | GetHashCode | 特定の型のハッシュ関数として機能します。GetHashCode は、ハッシュ アルゴリズムや、ハッシュ テーブルのようなデータ構造での使用に適しています。 (Object から継承されます。) |
![]() | GetType | 現在のインスタンスの Type を取得します。 (Object から継承されます。) |
![]() | GetXml | オーバーライドされます。 DSAKeyValue 要素の XML 表現を返します。 |
![]() | LoadXml | オーバーライドされます。 XML 要素から DSAKeyValue の状態を読み込みます。 |
![]() | ReferenceEquals | 指定した複数の Object インスタンスが同一かどうかを判断します。 (Object から継承されます。) |
![]() | ToString | 現在の Object を表す String を返します。 (Object から継承されます。) |

名前 | 説明 | |
---|---|---|
![]() | Finalize | Object がガベージ コレクションにより収集される前に、その Object がリソースを解放し、その他のクリーンアップ操作を実行できるようにします。 (Object から継承されます。) |
![]() | MemberwiseClone | 現在の Object の簡易コピーを作成します。 (Object から継承されます。) |

- DSAKeyValueのページへのリンク