EncryptedXml.XmlEncAES256Url フィールド
メモ : このフィールドは、.NET Framework version 2.0 で新しく追加されたものです。 256 ビット AES (Advanced Encryption Standard) アルゴリズム (Rijndael アルゴリズムとも呼ばれます) の名前空間 URI (Uniform Resource Identifier) を表します。このフィールドは定数です。 名前空間: System.Security.Cryptography.Xml
アセンブリ: System.Security (system.security.dll 内)
構文
解説
使用例
プラットフォーム
バージョン情報
参照
アセンブリ: System.Security (system.security.dll 内)
構文解説使用例共通キーを使用して、XML ドキュメントを暗号化するコード例を次に示します。この例では、暗号化された XML ドキュメントのキー情報は含まれません。
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 TripleDES key. Dim tDESkey As New TripleDESCryptoServiceProvider() Try ' Encrypt the "creditcard" element. Encrypt(xmlDoc, "creditcard", tDESkey) ' Display the encrypted XML to the console. Console.WriteLine("Encrypted XML:") Console.WriteLine() Console.WriteLine(xmlDoc.OuterXml) ' Decrypt the "creditcard" element. Decrypt(xmlDoc, tDESkey) ' 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 TripleDES key. tDESkey.Clear() End Try End Sub Sub Encrypt(ByVal Doc As XmlDocument, ByVal ElementToEncrypt As String, ByVal Alg As SymmetricAlgorithm) ' 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 ' symmetric key. ''''''''''''''''''''''''''''''''''''''''''''''''''' Dim eXml As New EncryptedXml() Dim encryptedElement As Byte() = eXml.EncryptData(elementEncrypt, Alg, 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. ' Determine what kind of algorithm is being used and ' supply the appropriate URL to the EncryptionMethod element. Dim encryptionMethod As String = Nothing If TypeOf Alg Is TripleDES Then encryptionMethod = EncryptedXml.XmlEncTripleDESUrl ElseIf TypeOf Alg Is DES Then encryptionMethod = EncryptedXml.XmlEncDESUrl ElseIf TypeOf Alg Is Rijndael Then Select Case Alg.KeySize Case 128 encryptionMethod = EncryptedXml.XmlEncAES128Url Case 192 encryptionMethod = EncryptedXml.XmlEncAES192Url Case 256 encryptionMethod = EncryptedXml.XmlEncAES256Url End Select Else ' Throw an exception if the transform is not in the previous categories Throw New CryptographicException("The specified algorithm is not supported for XML Encryption.") End If edElement.EncryptionMethod = New EncryptionMethod(encryptionMethod) ' 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 'Encrypt Sub Decrypt(ByVal Doc As XmlDocument, ByVal Alg As SymmetricAlgorithm) ' 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 ' Find the EncryptedData element in the XmlDocument. Dim encryptedElement As XmlElement = Doc.GetElementsByTagName("EncryptedData")(0) ' If the EncryptedData element was not found, throw an exception. If encryptedElement Is Nothing Then Throw New XmlException("The EncryptedData element was not found.") End If ' Create an EncryptedData object and populate it. Dim edElement As New EncryptedData() edElement.LoadXml(encryptedElement) ' Create a new EncryptedXml object. Dim exml As New EncryptedXml() ' Decrypt the element using the symmetric key. Dim rgbOutput As Byte() = exml.DecryptData(edElement, Alg) ' Replace the encryptedData element with the plaintext XML element. exml.ReplaceData(encryptedElement, rgbOutput) 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 TripleDES key. TripleDESCryptoServiceProvider tDESkey = new TripleDESCryptoServiceProvider(); try { // Encrypt the "creditcard" element. Encrypt(xmlDoc, "creditcard", tDESkey); // Display the encrypted XML to the console. Console.WriteLine("Encrypted XML:"); Console.WriteLine(); Console.WriteLine(xmlDoc.OuterXml); // Decrypt the "creditcard" element. Decrypt(xmlDoc, tDESkey); // 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 TripleDES key. tDESkey.Clear(); } } public static void Encrypt(XmlDocument Doc, string ElementToEncrypt, SymmetricAlgorithm Alg) { // 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 // symmetric key. ////////////////////////////////////////////////// EncryptedXml eXml = new EncryptedXml(); byte[] encryptedElement = eXml.EncryptData(elementToEncrypt, Alg, 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. // Determine what kind of algorithm is being used and // supply the appropriate URL to the EncryptionMethod element. string encryptionMethod = null; if (Alg is TripleDES) { encryptionMethod = EncryptedXml.XmlEncTripleDESUrl; } else if (Alg is DES) { encryptionMethod = EncryptedXml.XmlEncDESUrl; } else if (Alg is Rijndael) { switch (Alg.KeySize) { case 128: encryptionMethod = EncryptedXml.XmlEncAES128Url; break; case 192: encryptionMethod = EncryptedXml.XmlEncAES192Url; break; case 256: encryptionMethod = EncryptedXml.XmlEncAES256Url; break; } } else { // Throw an exception if the transform is not in the previous categories throw new CryptographicException("The specified algorithm is not supported for XML Encryption."); } edElement.EncryptionMethod = new EncryptionMethod(encryptionMethod); // 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, SymmetricAlgorithm Alg) { // Check the arguments. if (Doc == null) throw new ArgumentNullException("Doc"); if (Alg == null) throw new ArgumentNullException("Alg"); // Find the EncryptedData element in the XmlDocument. XmlElement encryptedElement = Doc.GetElementsByTagName("EncryptedData")[0] as XmlElement; // If the EncryptedData element was not found, throw an exception. if (encryptedElement == null) { throw new XmlException("The EncryptedData element was not found."); } // Create an EncryptedData object and populate it. EncryptedData edElement = new EncryptedData(); edElement.LoadXml(encryptedElement); // Create a new EncryptedXml object. EncryptedXml exml = new EncryptedXml(); // Decrypt the element using the symmetric key. byte[] rgbOutput = exml.DecryptData(edElement, Alg); // Replace the encryptedData element with the plaintext XML element. exml.ReplaceData(encryptedElement, rgbOutput); } }
#using <System.Security.dll> #using <System.dll> #using <System.Xml.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, SymmetricAlgorithm^ Alg ) { // 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 // symmetric key. ////////////////////////////////////////////////// EncryptedXml^ eXml = gcnew EncryptedXml; array<Byte>^encryptedElement = eXml->EncryptData( elementToEncrypt, Alg, 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. // Determine what kind of algorithm is being used and // supply the appropriate URL to the EncryptionMethod element. String^ encryptionMethod = nullptr; if ( dynamic_cast<TripleDES^>(Alg) ) { encryptionMethod = EncryptedXml::XmlEncTripleDESUrl; } else if ( dynamic_cast<DES^>(Alg) ) { encryptionMethod = EncryptedXml::XmlEncDESUrl; } else if ( dynamic_cast<Rijndael^>(Alg) ) { switch ( Alg->KeySize ) { case 128: encryptionMethod = EncryptedXml::XmlEncAES128Url; break; case 192: encryptionMethod = EncryptedXml::XmlEncAES192Url; break; case 256: encryptionMethod = EncryptedXml::XmlEncAES256Url; break; } } else { // Throw an exception if the transform is not in the previous categories throw gcnew CryptographicException( L"The specified algorithm is not supported for XML Encryption." ); } edElement->EncryptionMethod = gcnew EncryptionMethod( encryptionMethod ); // 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, SymmetricAlgorithm^ Alg ) { // Check the arguments. if ( Doc == nullptr ) throw gcnew ArgumentNullException( L"Doc" ); if ( Alg == nullptr ) throw gcnew ArgumentNullException( L"Alg" ); // Find the EncryptedData element in the XmlDocument. XmlElement^ encryptedElement = dynamic_cast<XmlElement^>(Doc->GetElementsByTagName( L"EncryptedData" )->Item( 0 )); // If the EncryptedData element was not found, throw an exception. if ( encryptedElement == nullptr ) { throw gcnew XmlException( L"The EncryptedData element was not found." ); } // Create an EncryptedData object and populate it. EncryptedData^ edElement = gcnew EncryptedData; edElement->LoadXml( encryptedElement ); // Create a new EncryptedXml object. EncryptedXml^ exml = gcnew EncryptedXml; // Decrypt the element using the symmetric key. array<Byte>^rgbOutput = exml->DecryptData( edElement, Alg ); // Replace the encryptedData element with the plaintext XML element. exml->ReplaceData( encryptedElement, rgbOutput ); } 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 TripleDES key. TripleDESCryptoServiceProvider^ tDESkey = gcnew TripleDESCryptoServiceProvider; try { // Encrypt the "creditcard" element. Encrypt( xmlDoc, L"creditcard", tDESkey ); // Display the encrypted XML to the console. Console::WriteLine( L"Encrypted XML:" ); Console::WriteLine(); Console::WriteLine( xmlDoc->OuterXml ); // Decrypt the "creditcard" element. Decrypt( xmlDoc, tDESkey ); // 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 TripleDES key. tDESkey->Clear(); } }
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 TripleDES key. TripleDESCryptoServiceProvider tDESkey = new TripleDESCryptoServiceProvider(); try { // Encrypt the "creditcard" element. Encrypt(xmlDoc, "creditcard", tDESkey); // Display the encrypted XML to the console. Console.WriteLine("Encrypted XML:"); Console.WriteLine(); Console.WriteLine(xmlDoc.get_OuterXml()); // Decrypt the "creditcard" element. Decrypt(xmlDoc, tDESkey); // 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 TripleDES key. tDESkey.Clear(); } } //main public static void Encrypt(XmlDocument doc, String elementToEncrypt, SymmetricAlgorithm alg) throws XmlException,CryptographicException { // 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 // symmetric key. ////////////////////////////////////////////////// EncryptedXml eXml = new EncryptedXml(); ubyte encryptedElement[] = eXml.EncryptData(elementToEncrypt1, alg, 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. // Determine what kind of algorithm is being used and // supply the appropriate URL to the EncryptionMethod element. String encryptionMethod = null; if (alg instanceof TripleDES) { encryptionMethod = EncryptedXml.XmlEncTripleDESUrl; } else { if (alg instanceof DES) { encryptionMethod = EncryptedXml.XmlEncDESUrl; } else { if (alg instanceof Rijndael) { switch (alg.get_KeySize()) { case 128: encryptionMethod = EncryptedXml.XmlEncAES128Url; break; case 192: encryptionMethod = EncryptedXml.XmlEncAES192Url; break; case 256: encryptionMethod = EncryptedXml.XmlEncAES256Url; break; } } else { // Throw an exception if the transform is not in the // previous categories throw new CryptographicException("The specified algorithm" +" is not supported for XML Encryption."); } } } edElement.set_EncryptionMethod(new EncryptionMethod(encryptionMethod)); // 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, SymmetricAlgorithm alg) throws XmlException { // Check the arguments. if (doc == null) { throw new ArgumentNullException("doc"); } if (alg == null) { throw new ArgumentNullException("alg"); } // Find the EncryptedData element in the XmlDocument. XmlElement encryptedElement = (XmlElement)doc.GetElementsByTagName( "EncryptedData").get_ItemOf(0); // If the EncryptedData element was not found, throw an exception. if (encryptedElement == null) { throw new XmlException("The EncryptedData element was not found."); } // Create an EncryptedData object and populate it. EncryptedData edElement = new EncryptedData(); edElement.LoadXml(encryptedElement); // Create a new EncryptedXml object. EncryptedXml eXml = new EncryptedXml(); // Decrypt the element using the symmetric key. ubyte rgbOutput[] = eXml.DecryptData(edElement, alg); // Replace the encryptedData element with the plaintext XML element. eXml.ReplaceData(encryptedElement, rgbOutput); } //Decrypt } //Program
プラットフォーム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。
バージョン情報参照- EncryptedXml.XmlEncAES256Url フィールドのページへのリンク
