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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)

'Declaration
Protected MustOverride Function ProviderUnprotect ( _
	encryptedData As Byte() _
) As Byte()

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 Overrides Function ProviderUnprotect(ByVal encryptedData() As Byte) As Byte()

        ProtectedMemory.Unprotect(encryptedData, Scope)
        Return encryptedData

    End Function 'ProviderUnprotect

.NET Framework

Supported in: 4.6, 4.5
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