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DataProtector.ProviderUnprotect Method

.NET Framework 4.6 and 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: 4.6, 4.5
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