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DataProtector.ProviderUnprotect Method

.NET Framework 4.5

Specifies the delegate method in the derived class that the Unprotect method in the base class calls back into.

Namespace:  System.Security.Cryptography
Assembly:  System.Security (in System.Security.dll)

protected abstract byte[] ProviderUnprotect(
	byte[] encryptedData
)

Parameters

encryptedData
Type: System.Byte[]

The data to be unencrypted.

Return Value

Type: System.Byte[]
The unencrypted data..

The following example shows an implementation of the ProviderUnProtect method. It is part of a larger code example for the DataProtector class.

// 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;
}

.NET Framework

Supported in: 4.5

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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