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


KeyInfoEncryptedKey クラスは、EncryptedKey クラスをラップします。これにより、KeyInfo クラスのサブ要素として EncryptedKey クラスを追加できます。暗号化したセッション キーを暗号化した XML ドキュメントに追加する必要があるときは、KeyInfoEncryptedKey クラスを EncryptedKey クラスのインスタンスに初期化します。

非対称キーを使用して、XML ドキュメントを暗号化するコード例を次に示します。この例は、対称セッション キーを作成して文書を暗号化した後、非対称キーを使用して暗号化済みのセッション キーを XML ドキュメントに埋め込みます。
Imports System Imports System.Xml Imports System.Security.Cryptography Imports System.Security.Cryptography.Xml Module Program Sub Main(ByVal args() As String) ' Create an XmlDocument object. Dim xmlDoc As New XmlDocument() ' Load an XML file into the XmlDocument object. Try xmlDoc.PreserveWhitespace = True xmlDoc.Load("test.xml") Catch e As Exception Console.WriteLine(e.Message) End Try ' Create a new RSA key. This key will encrypt a symmetric key , ' which will then be imbedded in the XML document. Dim rsaKey = New RSACryptoServiceProvider() Try ' Encrypt the "creditcard" element. Encrypt(xmlDoc, "creditcard", rsaKey, "rsaKey") ' Display the encrypted XML to the console. Console.WriteLine("Encrypted XML:") Console.WriteLine() Console.WriteLine(xmlDoc.OuterXml) ' Decrypt the "creditcard" element. Decrypt(xmlDoc, rsaKey, "rsaKey") ' Display the encrypted XML to the console. Console.WriteLine() Console.WriteLine("Decrypted XML:") Console.WriteLine() Console.WriteLine(xmlDoc.OuterXml) Catch e As Exception Console.WriteLine(e.Message) Finally ' Clear the RSA key. rsaKey.Clear() End Try End Sub Sub Encrypt(ByVal Doc As XmlDocument, ByVal ElementToEncrypt As String, ByVal Alg As RSA, ByVal KeyName As String) ' Check the arguments. If Doc Is Nothing Then Throw New ArgumentNullException("Doc") End If If ElementToEncrypt Is Nothing Then Throw New ArgumentNullException("ElementToEncrypt") End If If Alg Is Nothing Then Throw New ArgumentNullException("Alg") End If ''''''''''''''''''''''''''''''''''''''''''''''''''' ' Find the specified element in the XmlDocument ' object and create a new XmlElemnt object. ''''''''''''''''''''''''''''''''''''''''''''''''''' Dim elementEncrypt As XmlElement = Doc.GetElementsByTagName(ElementToEncrypt)(0) ' Throw an XmlException if the element was not found. If elementToEncrypt Is Nothing Then Throw New XmlException("The specified element was not found") End If ''''''''''''''''''''''''''''''''''''''''''''''''''' ' Create a new instance of the EncryptedXml class ' and use it to encrypt the XmlElement with the ' a new random symmetric key. ''''''''''''''''''''''''''''''''''''''''''''''''''' ' Create a 256 bit Rijndael key. Dim sessionKey As New RijndaelManaged() sessionKey.KeySize = 256 Dim eXml As New EncryptedXml() Dim encryptedElement As Byte() = eXml.EncryptData(elementEncrypt, sessionKey, False) ''''''''''''''''''''''''''''''''''''''''''''''''''' ' Construct an EncryptedData object and populate ' it with the desired encryption information. ''''''''''''''''''''''''''''''''''''''''''''''''''' Dim edElement As New EncryptedData() edElement.Type = EncryptedXml.XmlEncElementUrl ' Create an EncryptionMethod element so that the ' receiver knows which algorithm to use for decryption. edElement.EncryptionMethod = New EncryptionMethod(EncryptedXml.XmlEncAES256Url) ' Encrypt the session key and add it to an EncryptedKey element. Dim ek As New EncryptedKey() Dim encryptedKey As Byte() = EncryptedXml.EncryptKey(sessionKey.Key, Alg, False) ek.CipherData = New CipherData(encryptedKey) ek.EncryptionMethod = New EncryptionMethod(EncryptedXml.XmlEncRSA15Url) ' Set the KeyInfo element to specify the ' name of the RSA key. ' Create a new KeyInfo element. edElement.KeyInfo = New KeyInfo() ' Create a new KeyInfoName element. Dim kin As New KeyInfoName() ' Specify a name for the key. kin.Value = KeyName ' Add the KeyInfoName element to the ' EncryptedKey object. ek.KeyInfo.AddClause(kin) ' Add the encrypted key to the ' EncryptedData object. edElement.KeyInfo.AddClause(New KeyInfoEncryptedKey(ek)) ' Add the encrypted element data to the ' EncryptedData object. edElement.CipherData.CipherValue = encryptedElement ''''''''''''''''''''''''''''''''''''''''''''''''''' ' Replace the element from the original XmlDocument ' object with the EncryptedData element. ''''''''''''''''''''''''''''''''''''''''''''''''''' EncryptedXml.ReplaceElement(elementEncrypt, edElement, False) End Sub Sub Decrypt(ByVal Doc As XmlDocument, ByVal Alg As RSA, ByVal KeyName As String) ' Check the arguments. If Doc Is Nothing Then Throw New ArgumentNullException("Doc") End If If Alg Is Nothing Then Throw New ArgumentNullException("Alg") End If If KeyName Is Nothing Then Throw New ArgumentNullException("KeyName") End If ' Create a new EncryptedXml object. Dim exml As New EncryptedXml(Doc) ' Add a key-name mapping. ' This method can only decrypt documents ' that present the specified key name. exml.AddKeyNameMapping(KeyName, Alg) ' Decrypt the element. exml.DecryptDocument() End Sub End Module
using System; using System.Xml; using System.Security.Cryptography; using System.Security.Cryptography.Xml; class Program { static void Main(string[] args) { // Create an XmlDocument object. XmlDocument xmlDoc = new XmlDocument(); // Load an XML file into the XmlDocument object. try { xmlDoc.PreserveWhitespace = true; xmlDoc.Load("test.xml"); } catch (Exception e) { Console.WriteLine(e.Message); } // Create a new RSA key. This key will encrypt a symmetric key, // which will then be imbedded in the XML document. RSA rsaKey = new RSACryptoServiceProvider(); try { // Encrypt the "creditcard" element. Encrypt(xmlDoc, "creditcard", rsaKey, "rsaKey"); // Display the encrypted XML to the console. Console.WriteLine("Encrypted XML:"); Console.WriteLine(); Console.WriteLine(xmlDoc.OuterXml); // Decrypt the "creditcard" element. Decrypt(xmlDoc, rsaKey, "rsaKey"); // Display the encrypted XML to the console. Console.WriteLine(); Console.WriteLine("Decrypted XML:"); Console.WriteLine(); Console.WriteLine(xmlDoc.OuterXml); } catch (Exception e) { Console.WriteLine(e.Message); } finally { // Clear the RSA key. rsaKey.Clear(); } } public static void Encrypt(XmlDocument Doc, string ElementToEncrypt, RSA Alg, string KeyName) { // Check the arguments. if (Doc == null) throw new ArgumentNullException("Doc"); if (ElementToEncrypt == null) throw new ArgumentNullException("ElementToEncrypt"); if (Alg == null) throw new ArgumentNullException("Alg"); //////////////////////////////////////////////// // Find the specified element in the XmlDocument // object and create a new XmlElemnt object. //////////////////////////////////////////////// XmlElement elementToEncrypt = Doc.GetElementsByTagName(ElementToEncrypt)[0] as XmlElement; // Throw an XmlException if the element was not found. if (elementToEncrypt == null) { throw new XmlException("The specified element was not found"); } ////////////////////////////////////////////////// // Create a new instance of the EncryptedXml class // and use it to encrypt the XmlElement with the // a new random symmetric key. ////////////////////////////////////////////////// // Create a 256 bit Rijndael key. RijndaelManaged sessionKey = new RijndaelManaged(); sessionKey.KeySize = 256; EncryptedXml eXml = new EncryptedXml(); byte[] encryptedElement = eXml.EncryptData(elementToEncrypt, sessionKey, false); //////////////////////////////////////////////// // Construct an EncryptedData object and populate // it with the desired encryption information. //////////////////////////////////////////////// EncryptedData edElement = new EncryptedData(); edElement.Type = EncryptedXml.XmlEncElementUrl; // Create an EncryptionMethod element so that the // receiver knows which algorithm to use for decryption. edElement.EncryptionMethod = new EncryptionMethod(EncryptedXml.XmlEncAES256Url); // Encrypt the session key and add it to an EncryptedKey element. EncryptedKey ek = new EncryptedKey(); byte[] encryptedKey = EncryptedXml.EncryptKey(sessionKey.Key, Alg, false); ek.CipherData = new CipherData(encryptedKey); ek.EncryptionMethod = new EncryptionMethod(EncryptedXml.XmlEncRSA15Url); // Set the KeyInfo element to specify the // name of the RSA key. // Create a new KeyInfo element. edElement.KeyInfo = new KeyInfo(); // Create a new KeyInfoName element. KeyInfoName kin = new KeyInfoName(); // Specify a name for the key. kin.Value = KeyName; // Add the KeyInfoName element to the // EncryptedKey object. ek.KeyInfo.AddClause(kin); // Add the encrypted key to the // EncryptedData object. edElement.KeyInfo.AddClause(new KeyInfoEncryptedKey(ek)); // Add the encrypted element data to the // EncryptedData object. edElement.CipherData.CipherValue = encryptedElement; //////////////////////////////////////////////////// // Replace the element from the original XmlDocument // object with the EncryptedData element. //////////////////////////////////////////////////// EncryptedXml.ReplaceElement(elementToEncrypt, edElement, false); } public static void Decrypt(XmlDocument Doc, RSA Alg, string KeyName) { // Check the arguments. if (Doc == null) throw new ArgumentNullException("Doc"); if (Alg == null) throw new ArgumentNullException("Alg"); if (KeyName == null) throw new ArgumentNullException("KeyName"); // Create a new EncryptedXml object. EncryptedXml exml = new EncryptedXml(Doc); // Add a key-name mapping. // This method can only decrypt documents // that present the specified key name. exml.AddKeyNameMapping(KeyName, Alg); // Decrypt the element. exml.DecryptDocument(); } }
#using <System.Xml.dll> #using <System.Security.dll> #using <System.dll> using namespace System; using namespace System::Xml; using namespace System::Security::Cryptography; using namespace System::Security::Cryptography::Xml; static void Encrypt( XmlDocument^ Doc, String^ ElementToEncrypt, RSA^ Alg, String^ KeyName ) { // Check the arguments. if ( Doc == nullptr ) throw gcnew ArgumentNullException( L"Doc" ); if ( ElementToEncrypt == nullptr ) throw gcnew ArgumentNullException( L"ElementToEncrypt" ); if ( Alg == nullptr ) throw gcnew ArgumentNullException( L"Alg" ); //////////////////////////////////////////////// // Find the specified element in the XmlDocument // object and create a new XmlElemnt object. //////////////////////////////////////////////// XmlElement^ elementToEncrypt = dynamic_cast<XmlElement^>(Doc->GetElementsByTagName( ElementToEncrypt )->Item( 0 )); // Throw an XmlException if the element was not found. if ( elementToEncrypt == nullptr ) { throw gcnew XmlException( L"The specified element was not found" ); } ////////////////////////////////////////////////// // Create a new instance of the EncryptedXml class // and use it to encrypt the XmlElement with the // a new random symmetric key. ////////////////////////////////////////////////// // Create a 256 bit Rijndael key. RijndaelManaged^ sessionKey = gcnew RijndaelManaged; sessionKey->KeySize = 256; EncryptedXml^ eXml = gcnew EncryptedXml; array<Byte>^encryptedElement = eXml->EncryptData( elementToEncrypt, sessionKey, false ); //////////////////////////////////////////////// // Construct an EncryptedData object and populate // it with the desired encryption information. //////////////////////////////////////////////// EncryptedData^ edElement = gcnew EncryptedData; edElement->Type = EncryptedXml::XmlEncElementUrl; // Create an EncryptionMethod element so that the // receiver knows which algorithm to use for decryption. edElement->EncryptionMethod = gcnew EncryptionMethod( EncryptedXml::XmlEncAES256Url ); // Encrypt the session key and add it to an EncryptedKey element. EncryptedKey^ ek = gcnew EncryptedKey; array<Byte>^encryptedKey = EncryptedXml::EncryptKey( sessionKey->Key, Alg, false ); ek->CipherData = gcnew CipherData( encryptedKey ); ek->EncryptionMethod = gcnew EncryptionMethod( EncryptedXml::XmlEncRSA15Url ); // Set the KeyInfo element to specify the // name of the RSA key. // Create a new KeyInfo element. edElement->KeyInfo = gcnew KeyInfo; // Create a new KeyInfoName element. KeyInfoName^ kin = gcnew KeyInfoName; // Specify a name for the key. kin->Value = KeyName; // Add the KeyInfoName element to the // EncryptedKey object. ek->KeyInfo->AddClause( kin ); // Add the encrypted key to the // EncryptedData object. edElement->KeyInfo->AddClause( gcnew KeyInfoEncryptedKey( ek ) ); // Add the encrypted element data to the // EncryptedData object. edElement->CipherData->CipherValue = encryptedElement; //////////////////////////////////////////////////// // Replace the element from the original XmlDocument // object with the EncryptedData element. //////////////////////////////////////////////////// EncryptedXml::ReplaceElement( elementToEncrypt, edElement, false ); } static void Decrypt( XmlDocument^ Doc, RSA^ Alg, String^ KeyName ) { // Check the arguments. if ( Doc == nullptr ) throw gcnew ArgumentNullException( L"Doc" ); if ( Alg == nullptr ) throw gcnew ArgumentNullException( L"Alg" ); if ( KeyName == nullptr ) throw gcnew ArgumentNullException( L"KeyName" ); // Create a new EncryptedXml object. EncryptedXml^ exml = gcnew EncryptedXml( Doc ); // Add a key-name mapping. // This method can only decrypt documents // that present the specified key name. exml->AddKeyNameMapping( KeyName, Alg ); // Decrypt the element. exml->DecryptDocument(); } int main() { // Create an XmlDocument object. XmlDocument^ xmlDoc = gcnew XmlDocument; // Load an XML file into the XmlDocument object. try { xmlDoc->PreserveWhitespace = true; xmlDoc->Load( L"test.xml" ); } catch ( Exception^ e ) { Console::WriteLine( e->Message ); } // Create a new RSA key. This key will encrypt a symmetric key, // which will then be imbedded in the XML document. RSA^ rsaKey = gcnew RSACryptoServiceProvider; try { // Encrypt the "creditcard" element. Encrypt( xmlDoc, L"creditcard", rsaKey, L"rsaKey" ); // Display the encrypted XML to the console. Console::WriteLine( L"Encrypted XML:" ); Console::WriteLine(); Console::WriteLine( xmlDoc->OuterXml ); // Decrypt the "creditcard" element. Decrypt( xmlDoc, rsaKey, L"rsaKey" ); // Display the encrypted XML to the console. Console::WriteLine(); Console::WriteLine( L"Decrypted XML:" ); Console::WriteLine(); Console::WriteLine( xmlDoc->OuterXml ); } catch ( Exception^ e ) { Console::WriteLine( e->Message ); } finally { // Clear the RSA key. rsaKey->Clear(); } return 1; }
import System.*; import System.Xml.*; import System.Security.Cryptography.*; import System.Security.Cryptography.Xml.*; class Program { public static void main(String[] args) { // Create an XmlDocument object. XmlDocument xmlDoc = new XmlDocument(); // Load an XML file into the XmlDocument object. try { xmlDoc.set_PreserveWhitespace(true); xmlDoc.Load("test.xml"); } catch (System.Exception e) { Console.WriteLine(e.get_Message()); } // Create a new RSA key. This key will encrypt a symmetric key, // which will then be imbedded in the XML document. RSA rsaKey = new RSACryptoServiceProvider(); try { // Encrypt the "creditcard" element. Encrypt(xmlDoc, "creditcard", rsaKey, "rsaKey"); // Display the encrypted XML to the console. Console.WriteLine("Encrypted XML:"); Console.WriteLine(); Console.WriteLine(xmlDoc.get_OuterXml()); // Decrypt the "creditcard" element. Decrypt(xmlDoc, rsaKey, "rsaKey"); // Display the encrypted XML to the console. Console.WriteLine(); Console.WriteLine("Decrypted XML:"); Console.WriteLine(); Console.WriteLine(xmlDoc.get_OuterXml()); } catch (System.Exception e) { Console.WriteLine(e.get_Message()); } finally { // Clear the RSA key. rsaKey.Clear(); } } //main public static void Encrypt(XmlDocument doc, String elementToEncrypt, RSA alg, String keyName) throws ArgumentNullException,XmlException { // Check the arguments. if (doc == null) { throw new ArgumentNullException("doc"); } if (elementToEncrypt == null) { throw new ArgumentNullException("elementToEncrypt"); } if (alg == null) { throw new ArgumentNullException("alg"); } //////////////////////////////////////////////// // Find the specified element in the XmlDocument // object and create a new XmlElemnt object. //////////////////////////////////////////////// XmlElement elementToEncrypt1 = (XmlElement)doc.GetElementsByTagName( elementToEncrypt).get_ItemOf(0); // Throw an XmlException if the element was not found. if (elementToEncrypt1 == null) { throw new XmlException("The specified element was not found"); } ////////////////////////////////////////////////// // Create a new instance of the EncryptedXml class // and use it to encrypt the XmlElement with the // a new random symmetric key. ////////////////////////////////////////////////// // Create a 256 bit Rijndael key. RijndaelManaged sessionKey = new RijndaelManaged(); sessionKey.set_KeySize(256); EncryptedXml eXml = new EncryptedXml(); ubyte encryptedElement[] = eXml.EncryptData(elementToEncrypt1, sessionKey, false); //////////////////////////////////////////////// // Construct an EncryptedData object and populate // it with the desired encryption information. //////////////////////////////////////////////// EncryptedData edElement = new EncryptedData(); edElement.set_Type(EncryptedXml.XmlEncElementUrl); // Create an EncryptionMethod element so that the // receiver knows which algorithm to use for decryption. edElement.set_EncryptionMethod(new EncryptionMethod( EncryptedXml.XmlEncAES256Url)); // Encrypt the session key and add it to an EncryptedKey element. EncryptedKey ek = new EncryptedKey(); ubyte encryptedKey[] = EncryptedXml.EncryptKey(sessionKey.get_Key(), alg, false); ek.set_CipherData(new CipherData(encryptedKey)); ek.set_EncryptionMethod(new EncryptionMethod(EncryptedXml. XmlEncRSA15Url)); // Set the KeyInfo element to specify the // name of the RSA key. // Create a new KeyInfo element. edElement.set_KeyInfo(new KeyInfo()); // Create a new KeyInfoName element. KeyInfoName kin = new KeyInfoName(); // Specify a name for the key. kin.set_Value(keyName); // Add the KeyInfoName element to the // EncryptedKey object. ek.get_KeyInfo().AddClause(kin); // Add the encrypted key to the // EncryptedData object. edElement.get_KeyInfo().AddClause(new KeyInfoEncryptedKey(ek)); // Add the encrypted element data to the // EncryptedData object. edElement.get_CipherData().set_CipherValue(encryptedElement); //////////////////////////////////////////////////// // Replace the element from the original XmlDocument // object with the EncryptedData element. //////////////////////////////////////////////////// EncryptedXml.ReplaceElement(elementToEncrypt1, edElement, false); } //Encrypt public static void Decrypt(XmlDocument doc, RSA alg, String keyName) { // Check the arguments. if (doc == null) { throw new ArgumentNullException("doc"); } if (alg == null) { throw new ArgumentNullException("alg"); } if (keyName == null) { throw new ArgumentNullException("keyName"); } // Create a new EncryptedXml object. EncryptedXml eXml = new EncryptedXml(doc); // Add a key-name mapping. // This method can only decrypt documents // that present the specified key name. eXml.AddKeyNameMapping(keyName, alg); // Decrypt the element. eXml.DecryptDocument(); } //Decrypt } //Program

System.Security.Cryptography.Xml.KeyInfoClause
System.Security.Cryptography.Xml.KeyInfoEncryptedKey


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。


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


このコンストラクタは、EncryptedKey クラスのインスタンスを使用して KeyInfoEncryptedKey クラスを初期化しません。EncryptedKey プロパティは、このコンストラクタを使用するときに EncryptedKey オブジェクトを指定するために使用します。

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。


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


非対称キーを使用して、XML ドキュメントを暗号化するコード例を次に示します。この例は、対称セッション キーを作成して文書を暗号化した後、非対称キーを使用して暗号化済みのセッション キーを XML ドキュメントに埋め込みます。
Imports System Imports System.Xml Imports System.Security.Cryptography Imports System.Security.Cryptography.Xml Module Program Sub Main(ByVal args() As String) ' Create an XmlDocument object. Dim xmlDoc As New XmlDocument() ' Load an XML file into the XmlDocument object. Try xmlDoc.PreserveWhitespace = True xmlDoc.Load("test.xml") Catch e As Exception Console.WriteLine(e.Message) End Try ' Create a new RSA key. This key will encrypt a symmetric key , ' which will then be imbedded in the XML document. Dim rsaKey = New RSACryptoServiceProvider() Try ' Encrypt the "creditcard" element. Encrypt(xmlDoc, "creditcard", rsaKey, "rsaKey") ' Display the encrypted XML to the console. Console.WriteLine("Encrypted XML:") Console.WriteLine() Console.WriteLine(xmlDoc.OuterXml) ' Decrypt the "creditcard" element. Decrypt(xmlDoc, rsaKey, "rsaKey") ' Display the encrypted XML to the console. Console.WriteLine() Console.WriteLine("Decrypted XML:") Console.WriteLine() Console.WriteLine(xmlDoc.OuterXml) Catch e As Exception Console.WriteLine(e.Message) Finally ' Clear the RSA key. rsaKey.Clear() End Try End Sub Sub Encrypt(ByVal Doc As XmlDocument, ByVal ElementToEncrypt As String, ByVal Alg As RSA, ByVal KeyName As String) ' Check the arguments. If Doc Is Nothing Then Throw New ArgumentNullException("Doc") End If If ElementToEncrypt Is Nothing Then Throw New ArgumentNullException("ElementToEncrypt") End If If Alg Is Nothing Then Throw New ArgumentNullException("Alg") End If ''''''''''''''''''''''''''''''''''''''''''''''''''' ' Find the specified element in the XmlDocument ' object and create a new XmlElemnt object. ''''''''''''''''''''''''''''''''''''''''''''''''''' Dim elementEncrypt As XmlElement = Doc.GetElementsByTagName(ElementToEncrypt)(0) ' Throw an XmlException if the element was not found. If elementToEncrypt Is Nothing Then Throw New XmlException("The specified element was not found") End If ''''''''''''''''''''''''''''''''''''''''''''''''''' ' Create a new instance of the EncryptedXml class ' and use it to encrypt the XmlElement with the ' a new random symmetric key. ''''''''''''''''''''''''''''''''''''''''''''''''''' ' Create a 256 bit Rijndael key. Dim sessionKey As New RijndaelManaged() sessionKey.KeySize = 256 Dim eXml As New EncryptedXml() Dim encryptedElement As Byte() = eXml.EncryptData(elementEncrypt, sessionKey, False) ''''''''''''''''''''''''''''''''''''''''''''''''''' ' Construct an EncryptedData object and populate ' it with the desired encryption information. ''''''''''''''''''''''''''''''''''''''''''''''''''' Dim edElement As New EncryptedData() edElement.Type = EncryptedXml.XmlEncElementUrl ' Create an EncryptionMethod element so that the ' receiver knows which algorithm to use for decryption. edElement.EncryptionMethod = New EncryptionMethod(EncryptedXml.XmlEncAES256Url) ' Encrypt the session key and add it to an EncryptedKey element. Dim ek As New EncryptedKey() Dim encryptedKey As Byte() = EncryptedXml.EncryptKey(sessionKey.Key, Alg, False) ek.CipherData = New CipherData(encryptedKey) ek.EncryptionMethod = New EncryptionMethod(EncryptedXml.XmlEncRSA15Url) ' Set the KeyInfo element to specify the ' name of the RSA key. ' Create a new KeyInfo element. edElement.KeyInfo = New KeyInfo() ' Create a new KeyInfoName element. Dim kin As New KeyInfoName() ' Specify a name for the key. kin.Value = KeyName ' Add the KeyInfoName element to the ' EncryptedKey object. ek.KeyInfo.AddClause(kin) ' Add the encrypted key to the ' EncryptedData object. edElement.KeyInfo.AddClause(New KeyInfoEncryptedKey(ek)) ' Add the encrypted element data to the ' EncryptedData object. edElement.CipherData.CipherValue = encryptedElement ''''''''''''''''''''''''''''''''''''''''''''''''''' ' Replace the element from the original XmlDocument ' object with the EncryptedData element. ''''''''''''''''''''''''''''''''''''''''''''''''''' EncryptedXml.ReplaceElement(elementEncrypt, edElement, False) End Sub Sub Decrypt(ByVal Doc As XmlDocument, ByVal Alg As RSA, ByVal KeyName As String) ' Check the arguments. If Doc Is Nothing Then Throw New ArgumentNullException("Doc") End If If Alg Is Nothing Then Throw New ArgumentNullException("Alg") End If If KeyName Is Nothing Then Throw New ArgumentNullException("KeyName") End If ' Create a new EncryptedXml object. Dim exml As New EncryptedXml(Doc) ' Add a key-name mapping. ' This method can only decrypt documents ' that present the specified key name. exml.AddKeyNameMapping(KeyName, Alg) ' Decrypt the element. exml.DecryptDocument() End Sub End Module
using System; using System.Xml; using System.Security.Cryptography; using System.Security.Cryptography.Xml; class Program { static void Main(string[] args) { // Create an XmlDocument object. XmlDocument xmlDoc = new XmlDocument(); // Load an XML file into the XmlDocument object. try { xmlDoc.PreserveWhitespace = true; xmlDoc.Load("test.xml"); } catch (Exception e) { Console.WriteLine(e.Message); } // Create a new RSA key. This key will encrypt a symmetric key, // which will then be imbedded in the XML document. RSA rsaKey = new RSACryptoServiceProvider(); try { // Encrypt the "creditcard" element. Encrypt(xmlDoc, "creditcard", rsaKey, "rsaKey"); // Display the encrypted XML to the console. Console.WriteLine("Encrypted XML:"); Console.WriteLine(); Console.WriteLine(xmlDoc.OuterXml); // Decrypt the "creditcard" element. Decrypt(xmlDoc, rsaKey, "rsaKey"); // Display the encrypted XML to the console. Console.WriteLine(); Console.WriteLine("Decrypted XML:"); Console.WriteLine(); Console.WriteLine(xmlDoc.OuterXml); } catch (Exception e) { Console.WriteLine(e.Message); } finally { // Clear the RSA key. rsaKey.Clear(); } } public static void Encrypt(XmlDocument Doc, string ElementToEncrypt, RSA Alg, string KeyName) { // Check the arguments. if (Doc == null) throw new ArgumentNullException("Doc"); if (ElementToEncrypt == null) throw new ArgumentNullException("ElementToEncrypt"); if (Alg == null) throw new ArgumentNullException("Alg"); //////////////////////////////////////////////// // Find the specified element in the XmlDocument // object and create a new XmlElemnt object. //////////////////////////////////////////////// XmlElement elementToEncrypt = Doc.GetElementsByTagName(ElementToEncrypt)[0] as XmlElement; // Throw an XmlException if the element was not found. if (elementToEncrypt == null) { throw new XmlException("The specified element was not found"); } ////////////////////////////////////////////////// // Create a new instance of the EncryptedXml class // and use it to encrypt the XmlElement with the // a new random symmetric key. ////////////////////////////////////////////////// // Create a 256 bit Rijndael key. RijndaelManaged sessionKey = new RijndaelManaged(); sessionKey.KeySize = 256; EncryptedXml eXml = new EncryptedXml(); byte[] encryptedElement = eXml.EncryptData(elementToEncrypt, sessionKey, false); //////////////////////////////////////////////// // Construct an EncryptedData object and populate // it with the desired encryption information. //////////////////////////////////////////////// EncryptedData edElement = new EncryptedData(); edElement.Type = EncryptedXml.XmlEncElementUrl; // Create an EncryptionMethod element so that the // receiver knows which algorithm to use for decryption. edElement.EncryptionMethod = new EncryptionMethod(EncryptedXml.XmlEncAES256Url); // Encrypt the session key and add it to an EncryptedKey element. EncryptedKey ek = new EncryptedKey(); byte[] encryptedKey = EncryptedXml.EncryptKey(sessionKey.Key, Alg, false); ek.CipherData = new CipherData(encryptedKey); ek.EncryptionMethod = new EncryptionMethod(EncryptedXml.XmlEncRSA15Url); // Set the KeyInfo element to specify the // name of the RSA key. // Create a new KeyInfo element. edElement.KeyInfo = new KeyInfo(); // Create a new KeyInfoName element. KeyInfoName kin = new KeyInfoName(); // Specify a name for the key. kin.Value = KeyName; // Add the KeyInfoName element to the // EncryptedKey object. ek.KeyInfo.AddClause(kin); // Add the encrypted key to the // EncryptedData object. edElement.KeyInfo.AddClause(new KeyInfoEncryptedKey(ek)); // Add the encrypted element data to the // EncryptedData object. edElement.CipherData.CipherValue = encryptedElement; //////////////////////////////////////////////////// // Replace the element from the original XmlDocument // object with the EncryptedData element. //////////////////////////////////////////////////// EncryptedXml.ReplaceElement(elementToEncrypt, edElement, false); } public static void Decrypt(XmlDocument Doc, RSA Alg, string KeyName) { // Check the arguments. if (Doc == null) throw new ArgumentNullException("Doc"); if (Alg == null) throw new ArgumentNullException("Alg"); if (KeyName == null) throw new ArgumentNullException("KeyName"); // Create a new EncryptedXml object. EncryptedXml exml = new EncryptedXml(Doc); // Add a key-name mapping. // This method can only decrypt documents // that present the specified key name. exml.AddKeyNameMapping(KeyName, Alg); // Decrypt the element. exml.DecryptDocument(); } }
#using <System.Xml.dll> #using <System.Security.dll> #using <System.dll> using namespace System; using namespace System::Xml; using namespace System::Security::Cryptography; using namespace System::Security::Cryptography::Xml; static void Encrypt( XmlDocument^ Doc, String^ ElementToEncrypt, RSA^ Alg, String^ KeyName ) { // Check the arguments. if ( Doc == nullptr ) throw gcnew ArgumentNullException( L"Doc" ); if ( ElementToEncrypt == nullptr ) throw gcnew ArgumentNullException( L"ElementToEncrypt" ); if ( Alg == nullptr ) throw gcnew ArgumentNullException( L"Alg" ); //////////////////////////////////////////////// // Find the specified element in the XmlDocument // object and create a new XmlElemnt object. //////////////////////////////////////////////// XmlElement^ elementToEncrypt = dynamic_cast<XmlElement^>(Doc->GetElementsByTagName( ElementToEncrypt )->Item( 0 )); // Throw an XmlException if the element was not found. if ( elementToEncrypt == nullptr ) { throw gcnew XmlException( L"The specified element was not found" ); } ////////////////////////////////////////////////// // Create a new instance of the EncryptedXml class // and use it to encrypt the XmlElement with the // a new random symmetric key. ////////////////////////////////////////////////// // Create a 256 bit Rijndael key. RijndaelManaged^ sessionKey = gcnew RijndaelManaged; sessionKey->KeySize = 256; EncryptedXml^ eXml = gcnew EncryptedXml; array<Byte>^encryptedElement = eXml->EncryptData( elementToEncrypt, sessionKey, false ); //////////////////////////////////////////////// // Construct an EncryptedData object and populate // it with the desired encryption information. //////////////////////////////////////////////// EncryptedData^ edElement = gcnew EncryptedData; edElement->Type = EncryptedXml::XmlEncElementUrl; // Create an EncryptionMethod element so that the // receiver knows which algorithm to use for decryption. edElement->EncryptionMethod = gcnew EncryptionMethod( EncryptedXml::XmlEncAES256Url ); // Encrypt the session key and add it to an EncryptedKey element. EncryptedKey^ ek = gcnew EncryptedKey; array<Byte>^encryptedKey = EncryptedXml::EncryptKey( sessionKey->Key, Alg, false ); ek->CipherData = gcnew CipherData( encryptedKey ); ek->EncryptionMethod = gcnew EncryptionMethod( EncryptedXml::XmlEncRSA15Url ); // Set the KeyInfo element to specify the // name of the RSA key. // Create a new KeyInfo element. edElement->KeyInfo = gcnew KeyInfo; // Create a new KeyInfoName element. KeyInfoName^ kin = gcnew KeyInfoName; // Specify a name for the key. kin->Value = KeyName; // Add the KeyInfoName element to the // EncryptedKey object. ek->KeyInfo->AddClause( kin ); // Add the encrypted key to the // EncryptedData object. edElement->KeyInfo->AddClause( gcnew KeyInfoEncryptedKey( ek ) ); // Add the encrypted element data to the // EncryptedData object. edElement->CipherData->CipherValue = encryptedElement; //////////////////////////////////////////////////// // Replace the element from the original XmlDocument // object with the EncryptedData element. //////////////////////////////////////////////////// EncryptedXml::ReplaceElement( elementToEncrypt, edElement, false ); } static void Decrypt( XmlDocument^ Doc, RSA^ Alg, String^ KeyName ) { // Check the arguments. if ( Doc == nullptr ) throw gcnew ArgumentNullException( L"Doc" ); if ( Alg == nullptr ) throw gcnew ArgumentNullException( L"Alg" ); if ( KeyName == nullptr ) throw gcnew ArgumentNullException( L"KeyName" ); // Create a new EncryptedXml object. EncryptedXml^ exml = gcnew EncryptedXml( Doc ); // Add a key-name mapping. // This method can only decrypt documents // that present the specified key name. exml->AddKeyNameMapping( KeyName, Alg ); // Decrypt the element. exml->DecryptDocument(); } int main() { // Create an XmlDocument object. XmlDocument^ xmlDoc = gcnew XmlDocument; // Load an XML file into the XmlDocument object. try { xmlDoc->PreserveWhitespace = true; xmlDoc->Load( L"test.xml" ); } catch ( Exception^ e ) { Console::WriteLine( e->Message ); } // Create a new RSA key. This key will encrypt a symmetric key, // which will then be imbedded in the XML document. RSA^ rsaKey = gcnew RSACryptoServiceProvider; try { // Encrypt the "creditcard" element. Encrypt( xmlDoc, L"creditcard", rsaKey, L"rsaKey" ); // Display the encrypted XML to the console. Console::WriteLine( L"Encrypted XML:" ); Console::WriteLine(); Console::WriteLine( xmlDoc->OuterXml ); // Decrypt the "creditcard" element. Decrypt( xmlDoc, rsaKey, L"rsaKey" ); // Display the encrypted XML to the console. Console::WriteLine(); Console::WriteLine( L"Decrypted XML:" ); Console::WriteLine(); Console::WriteLine( xmlDoc->OuterXml ); } catch ( Exception^ e ) { Console::WriteLine( e->Message ); } finally { // Clear the RSA key. rsaKey->Clear(); } return 1; }
import System.*; import System.Xml.*; import System.Security.Cryptography.*; import System.Security.Cryptography.Xml.*; class Program { public static void main(String[] args) { // Create an XmlDocument object. XmlDocument xmlDoc = new XmlDocument(); // Load an XML file into the XmlDocument object. try { xmlDoc.set_PreserveWhitespace(true); xmlDoc.Load("test.xml"); } catch (System.Exception e) { Console.WriteLine(e.get_Message()); } // Create a new RSA key. This key will encrypt a symmetric key, // which will then be imbedded in the XML document. RSA rsaKey = new RSACryptoServiceProvider(); try { // Encrypt the "creditcard" element. Encrypt(xmlDoc, "creditcard", rsaKey, "rsaKey"); // Display the encrypted XML to the console. Console.WriteLine("Encrypted XML:"); Console.WriteLine(); Console.WriteLine(xmlDoc.get_OuterXml()); // Decrypt the "creditcard" element. Decrypt(xmlDoc, rsaKey, "rsaKey"); // Display the encrypted XML to the console. Console.WriteLine(); Console.WriteLine("Decrypted XML:"); Console.WriteLine(); Console.WriteLine(xmlDoc.get_OuterXml()); } catch (System.Exception e) { Console.WriteLine(e.get_Message()); } finally { // Clear the RSA key. rsaKey.Clear(); } } //main public static void Encrypt(XmlDocument doc, String elementToEncrypt, RSA alg, String keyName) throws ArgumentNullException,XmlException { // Check the arguments. if (doc == null) { throw new ArgumentNullException("doc"); } if (elementToEncrypt == null) { throw new ArgumentNullException("elementToEncrypt"); } if (alg == null) { throw new ArgumentNullException("alg"); } //////////////////////////////////////////////// // Find the specified element in the XmlDocument // object and create a new XmlElemnt object. //////////////////////////////////////////////// XmlElement elementToEncrypt1 = (XmlElement)doc.GetElementsByTagName( elementToEncrypt).get_ItemOf(0); // Throw an XmlException if the element was not found. if (elementToEncrypt1 == null) { throw new XmlException("The specified element was not found"); } ////////////////////////////////////////////////// // Create a new instance of the EncryptedXml class // and use it to encrypt the XmlElement with the // a new random symmetric key. ////////////////////////////////////////////////// // Create a 256 bit Rijndael key. RijndaelManaged sessionKey = new RijndaelManaged(); sessionKey.set_KeySize(256); EncryptedXml eXml = new EncryptedXml(); ubyte encryptedElement[] = eXml.EncryptData(elementToEncrypt1, sessionKey, false); //////////////////////////////////////////////// // Construct an EncryptedData object and populate // it with the desired encryption information. //////////////////////////////////////////////// EncryptedData edElement = new EncryptedData(); edElement.set_Type(EncryptedXml.XmlEncElementUrl); // Create an EncryptionMethod element so that the // receiver knows which algorithm to use for decryption. edElement.set_EncryptionMethod(new EncryptionMethod( EncryptedXml.XmlEncAES256Url)); // Encrypt the session key and add it to an EncryptedKey element. EncryptedKey ek = new EncryptedKey(); ubyte encryptedKey[] = EncryptedXml.EncryptKey(sessionKey.get_Key(), alg, false); ek.set_CipherData(new CipherData(encryptedKey)); ek.set_EncryptionMethod(new EncryptionMethod(EncryptedXml. XmlEncRSA15Url)); // Set the KeyInfo element to specify the // name of the RSA key. // Create a new KeyInfo element. edElement.set_KeyInfo(new KeyInfo()); // Create a new KeyInfoName element. KeyInfoName kin = new KeyInfoName(); // Specify a name for the key. kin.set_Value(keyName); // Add the KeyInfoName element to the // EncryptedKey object. ek.get_KeyInfo().AddClause(kin); // Add the encrypted key to the // EncryptedData object. edElement.get_KeyInfo().AddClause(new KeyInfoEncryptedKey(ek)); // Add the encrypted element data to the // EncryptedData object. edElement.get_CipherData().set_CipherValue(encryptedElement); //////////////////////////////////////////////////// // Replace the element from the original XmlDocument // object with the EncryptedData element. //////////////////////////////////////////////////// EncryptedXml.ReplaceElement(elementToEncrypt1, edElement, false); } //Encrypt public static void Decrypt(XmlDocument doc, RSA alg, String keyName) { // Check the arguments. if (doc == null) { throw new ArgumentNullException("doc"); } if (alg == null) { throw new ArgumentNullException("alg"); } if (keyName == null) { throw new ArgumentNullException("keyName"); } // Create a new EncryptedXml object. EncryptedXml eXml = new EncryptedXml(doc); // Add a key-name mapping. // This method can only decrypt documents // that present the specified key name. eXml.AddKeyNameMapping(keyName, alg); // Decrypt the element. eXml.DecryptDocument(); } //Decrypt } //Program

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。


KeyInfoEncryptedKey コンストラクタ

名前 | 説明 |
---|---|
KeyInfoEncryptedKey () | KeyInfoEncryptedKey クラスの新しいインスタンスを初期化します。 |
KeyInfoEncryptedKey (EncryptedKey) | EncryptedKey オブジェクトを使用して KeyInfoEncryptedKey クラスの新しいインスタンスを 初期化します。 |

KeyInfoEncryptedKey プロパティ
KeyInfoEncryptedKey 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。 KeyInfoEncryptedKey オブジェクトの XML 表現を返します。 |
![]() | LoadXml | オーバーライドされます。 入力 XmlElement オブジェクトを解析し、一致させる KeyInfoEncryptedKey オブジェクトの内部状態を設定します。 |
![]() | 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。) |

KeyInfoEncryptedKey メンバ
EncryptedKey クラスをラップして、KeyInfo クラスのサブ要素として使用できるようにします。
KeyInfoEncryptedKey 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。 KeyInfoEncryptedKey オブジェクトの XML 表現を返します。 |
![]() | LoadXml | オーバーライドされます。 入力 XmlElement オブジェクトを解析し、一致させる KeyInfoEncryptedKey オブジェクトの内部状態を設定します。 |
![]() | 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。) |

Weblioに収録されているすべての辞書からKeyInfoEncryptedKeyを検索する場合は、下記のリンクをクリックしてください。

- KeyInfoEncryptedKeyのページへのリンク