MachineKey.Unprotect(Byte[], String[]) Method

Reference

Definition

Namespace:: System.Web.Security

Assembly:: System.Web.dll

Important

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Unprotects the specified data, which was protected by the Protect(Byte[], String[]) method.

public:
 static cli::array <System::Byte> ^ Unprotect(cli::array <System::Byte> ^ protectedData, ... cli::array <System::String ^> ^ purposes);

public static byte[] Unprotect (byte[] protectedData, params string[] purposes);

static member Unprotect : byte[] * string[] -> byte[]

Public Shared Function Unprotect (protectedData As Byte(), ParamArray purposes As String()) As Byte()

Parameters

protectedData: Byte[]

The ciphertext data to unprotect.

purposes: String[]

A list of purposes that describe what the data is meant for. This must be the same value that was passed to the Protect(Byte[], String[]) method when the data was protected.

Returns

Byte[]

The plaintext data.

Exceptions

ArgumentNullException

The protectedData parameter is null.

ArgumentException

The purposes array contains one or more white-space-only entries.

CryptographicException

Possible causes include the following:

The protected data was tampered with.
The value of the purposes parameter is not the same as the value that was specified when the data was protected.
The application is deployed to more than one server and is using auto-generated encryption keys.

Remarks

For information about this method, see the Protect method.

Applies to

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