EncryptionProperty 클래스
정의
중요
일부 정보는 릴리스되기 전에 상당 부분 수정될 수 있는 시험판 제품과 관련이 있습니다. Microsoft는 여기에 제공된 정보에 대해 어떠한 명시적이거나 묵시적인 보증도 하지 않습니다.
XML 암호화에 사용되는 <EncryptionProperty> 요소를 나타냅니다. 이 클래스는 상속될 수 없습니다.
public ref class EncryptionProperty sealedpublic sealed class EncryptionPropertytype EncryptionProperty = classPublic NotInheritable Class EncryptionProperty- 상속
-
EncryptionProperty
예제
다음 코드 예제에서는 XML 문서를 암호화하고 암호를 해독합니다. 이 코드 예제에서는 요소에 대한 사용자 지정 정보를 포함하는 개체를 EncryptedKey 만들고 EncryptionProperty 개체를 EncryptionProperty 클래스의 컬렉션에 EncryptionPropertyCollectionEncryptedXml 추가합니다. 마지막으로 이 코드 예제에서는 개체 및 컬렉션에 EncryptionProperty 대한 정보를 표시합니다 EncryptionPropertyCollection .
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 = RSA.Create();
try
{
// Encrypt the "creditcard" element.
Encrypt(xmlDoc, "creditcard", rsaKey, "rsaKey");
// Inspect the EncryptedKey element.
InspectElement(xmlDoc);
// Decrypt the "creditcard" element.
Decrypt(xmlDoc, rsaKey, "rsaKey");
}
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 Aes key.
Aes sessionKey = Aes.Create();
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);
// Save some more information about the key using
// the EncryptionProperty element. In this example,
// we will save the value "LibVersion1". You can save
// anything you want here.
// Create a new "EncryptionProperty" XmlElement object.
XmlElement element = new XmlDocument().CreateElement("EncryptionProperty", EncryptedXml.XmlEncNamespaceUrl);
// Set the value of the EncryptionProperty" XmlElement object.
element.InnerText = "LibVersion1";
// Create the EncryptionProperty object using the XmlElement object.
EncryptionProperty encProp = new EncryptionProperty(element);
// Add the EncryptionProperty object to the EncryptedData object.
edElement.AddProperty(encProp);
// 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();
}
static void InspectElement(XmlDocument Doc)
{
// Get the EncryptedData element from the XMLDocument object.
XmlElement encryptedData = Doc.GetElementsByTagName("EncryptedData")[0] as XmlElement;
// Create a new EncryptedData object.
EncryptedData encData = new EncryptedData();
// Load the XML from the document to
// initialize the EncryptedData object.
encData.LoadXml(encryptedData);
// Display the properties.
// Most values are Null by default.
Console.WriteLine("EncryptedData.CipherData: " + encData.CipherData.GetXml().InnerXml);
Console.WriteLine("EncryptedData.Encoding: " + encData.Encoding);
Console.WriteLine("EncryptedData.EncryptionMethod: " + encData.EncryptionMethod.GetXml().InnerXml);
EncryptionPropertyCollection encPropCollection = encData.EncryptionProperties;
Console.WriteLine("Number of elements in the EncryptionPropertyCollection: " + encPropCollection.Count);
//encPropCollection.
foreach(EncryptionProperty encProp in encPropCollection)
{
Console.WriteLine("EncryptionProperty.ID: " + encProp.Id);
Console.WriteLine("EncryptionProperty.PropertyElement: " + encProp.PropertyElement.InnerXml);
Console.WriteLine("EncryptionProperty.Target: " + encProp.Target);
}
Console.WriteLine("EncryptedData.Id: " + encData.Id);
Console.WriteLine("EncryptedData.KeyInfo: " + encData.KeyInfo.GetXml().InnerXml);
Console.WriteLine("EncryptedData.MimeType: " + encData.MimeType);
}
}
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 As RSA = RSA.Create()
Try
' Encrypt the "creditcard" element.
Encrypt(xmlDoc, "creditcard", rsaKey, "rsaKey")
' Inspect the EncryptedKey element.
InspectElement(xmlDoc)
' Decrypt the "creditcard" element.
Decrypt(xmlDoc, rsaKey, "rsaKey")
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 ElementToEncryptValue 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 ElementToEncryptValue 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 elementToEncrypt As XmlElement = Doc.GetElementsByTagName(ElementToEncryptValue)(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 Aes key.
Dim sessionKey As Aes = Aes.Create()
sessionKey.KeySize = 256
Dim eXml As New EncryptedXml()
Dim encryptedElement As Byte() = eXml.EncryptData(elementToEncrypt, 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)
' Save some more information about the key using
' the EncryptionProperty element. In this example,
' we will save the value "LibVersion1". You can save
' anything you want here.
' Create a new "EncryptionProperty" XmlElement object.
Dim element As XmlElement = New XmlDocument().CreateElement("EncryptionProperty", EncryptedXml.XmlEncNamespaceUrl)
' Set the value of the EncryptionProperty" XmlElement object.
element.InnerText = "LibVersion1"
' Create the EncryptionProperty object using the XmlElement object.
Dim encProp As New EncryptionProperty(element)
' Add the EncryptionProperty object to the EncryptedData object.
edElement.AddProperty(encProp)
' 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(elementToEncrypt, 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
Sub InspectElement(ByVal Doc As XmlDocument)
' Get the EncryptedData element from the XMLDocument object.
Dim encryptedData As XmlElement = Doc.GetElementsByTagName("EncryptedData")(0)
' Create a new EncryptedData object.
Dim encData As New EncryptedData()
' Load the XML from the document to
' initialize the EncryptedData object.
encData.LoadXml(encryptedData)
' Display the properties.
' Most values are Null by default.
Console.WriteLine("EncryptedData.CipherData: " + encData.CipherData.GetXml().InnerXml)
Console.WriteLine("EncryptedData.Encoding: " + encData.Encoding)
Console.WriteLine("EncryptedData.EncryptionMethod: " + encData.EncryptionMethod.GetXml().InnerXml)
Dim encPropCollection As EncryptionPropertyCollection = encData.EncryptionProperties
Console.WriteLine("Number of elements in the EncryptionPropertyCollection: " + encPropCollection.Count.ToString())
'encPropCollection.
Dim encProp As EncryptionProperty
For Each encProp In encPropCollection
Console.WriteLine("EncryptionProperty.ID: " + encProp.Id)
Console.WriteLine("EncryptionProperty.PropertyElement: " + encProp.PropertyElement.InnerXml)
Console.WriteLine("EncryptionProperty.Target: " + encProp.Target)
Next encProp
Console.WriteLine("EncryptedData.Id: " + encData.Id)
Console.WriteLine("EncryptedData.KeyInfo: " + encData.KeyInfo.GetXml().InnerXml)
Console.WriteLine("EncryptedData.MimeType: " + encData.MimeType)
End Sub
End Module
설명
클래스는 EncryptionProperty World Wide Web 컨소시엄 XML 암호화 구문 및 처리 사양에 정의된 요소를 캡슐화 <EncryptionProperty> 합니다.
클래스를 EncryptionProperty 사용하여 및 요소와 EncryptedKey 관련된 EncryptedData 추가 암호화 정보를 제공합니다. 예를 들어 이 클래스를 사용하여 타임스탬프를 지정합니다.
생성자
| EncryptionProperty() |
EncryptionProperty 클래스의 새 인스턴스를 초기화합니다. |
| EncryptionProperty(XmlElement) |
EncryptionProperty 개체를 사용하여 XmlElement 클래스의 새 인스턴스를 초기화합니다. |
속성
| Id |
현재 EncryptionProperty 개체의 ID를 가져옵니다. |
| PropertyElement |
XmlElement 개체를 나타내는 EncryptionProperty 개체를 가져오거나 설정합니다. |
| Target |
EncryptionProperty 개체의 대상을 가져옵니다. |
메서드
| Equals(Object) |
지정된 개체가 현재 개체와 같은지 확인합니다. (다음에서 상속됨 Object) |
| GetHashCode() |
기본 해시 함수로 작동합니다. (다음에서 상속됨 Object) |
| GetType() |
현재 인스턴스의 Type을 가져옵니다. (다음에서 상속됨 Object) |
| GetXml() |
XmlElement 클래스의 인스턴스를 캡슐화하는 EncryptionProperty 개체를 반환합니다. |
| LoadXml(XmlElement) |
입력 XmlElement를 구문 분석하여 EncryptionProperty 개체의 내부 상태를 이와 일치하도록 구성합니다. |
| MemberwiseClone() |
현재 Object의 단순 복사본을 만듭니다. (다음에서 상속됨 Object) |
| ToString() |
현재 개체를 나타내는 문자열을 반환합니다. (다음에서 상속됨 Object) |
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