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DataProtector.ProviderUnprotect(Byte[]) 方法

  • 參考

定義

命名空間:
System.Security.Cryptography
組件:
System.Security.dll

指定衍生類別中的委派方法，基底類別中的 Unprotect(Byte[]) 方法會呼叫回此方法中。

protected:
 abstract cli::array <System::Byte> ^ ProviderUnprotect(cli::array <System::Byte> ^ encryptedData);
protected abstract byte[] ProviderUnprotect (byte[] encryptedData);
abstract member ProviderUnprotect : byte[] -> byte[]
Protected MustOverride Function ProviderUnprotect (encryptedData As Byte()) As Byte()

參數

encryptedData
Byte[]

要解密的資料。

傳回

Byte[]

未加密的資料。

範例

下列範例會示範 ProviderUnprotect 方法的實作。 它是類別較大程式代碼範例的 DataProtector 一部分。

// To allow a service to hand out instances of a DataProtector we demand unrestricted DataProtectionPermission
// in the constructor, but Assert the permission when ProviderUnprotect is called..  This is similar to FileStream
// where access is checked at time of creation, not time of use.
[SecuritySafeCritical]
[DataProtectionPermission(SecurityAction.Assert, UnprotectData = true)]
protected override byte[] ProviderUnprotect(byte[] encryptedData)
{

    ProtectedMemory.Unprotect(encryptedData,Scope);
        return encryptedData;
}

' To allow a service to hand out instances of a DataProtector we demand unrestricted DataProtectionPermission 
' in the constructor, but Assert the permission when ProviderUnprotect is called..  This is similar to FileStream
' where access is checked at time of creation, not time of use.
<SecuritySafeCritical(), DataProtectionPermission(SecurityAction.Assert, UnprotectData:=True)> _
Protected Overrides Function ProviderUnprotect(ByVal encryptedData() As Byte) As Byte()

    ProtectedMemory.Unprotect(encryptedData, Scope)
    Return encryptedData

End Function 'ProviderUnprotect

適用於