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ProduceLegacyHmacValues Property
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HMACSHA512.ProduceLegacyHmacValues Property

Provides a workaround for the .NET Framework version 2.0 implementation of the HMACSHA512 algorithm, which is inconsistent with the .NET Framework version 2.0 Service Pack 1 implementation.

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

public bool ProduceLegacyHmacValues { get; set; }

Property Value

Type: System.Boolean
true to enable .NET Framework version 2.0 Service Pack 1 applications to interact with .NET Framework 2.0 applications; otherwise, false.

The purpose of the ProduceLegacyHmacValues Boolean property is to enable .NET Framework version 2.0 Service Pack 1 applications to interact with .NET Framework 2.0 applications. When you set this property to true, the HMACSHA512 object produces values that match the values produced by the .NET Framework 2.0. You should set this property only once after you create your HMAC object. You will need to reset your key afterwards, as shown in the following example. 

public static void Test()
    HMACSHA512 hmac = new HMACSHA512();
    hmac.ProduceLegacyHmacValues = true;
    hmac.Key = // ...Get the HMAC key.
    // ...
    // Use the HMAC algorithm.
    // ...

For additional information about the changes introduced by .NET Framework 2.0 SP1 to support HMACSHA512 output in the .NET Framework 2.0 environment, see the HMACSHA512 class.

.NET Framework

Supported in: 4, 3.5 SP1, 3.0 SP1, 2.0 SP1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

Community Additions

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