Windows Dev Center

KeyDerivationAlgorithmNames.Sp80056aConcatSha256 | sp80056aConcatSha256 property

Retrieves a string that contains "SP800_108_CTR_HMAC_SHA256".

Syntax


Public Shared ReadOnly Property Sp80056aConcatSha256 As String

Property value

Type: String [JavaScript] | System.String [.NET] | Platform::String [C++]

String that contains "SP800_108_CTR_HMAC_SHA256".

Remarks

Use the string retrieved by this property to set the Key Derivation Function (KDF) name when you call the OpenAlgorithm method on the KeyDerivationAlgorithmProvider class. The string represents an Sp800-56a algorithm that uses a Hashed Message Authentication Code (HMAC) based on the SHA256 (Secure Hash Algorithm 256) message digest algorithm as the underlying pseudorandom function.

To use this KDF, you must specify the appropriate parameters by calling the BuildForSP80056a method on the KeyDerivationParameters class. The parameters are internally concatenated before the function is used by the CreateKey method to derive a key.

Requirements (device family)

Device family

Universal

API contract

Windows.Foundation.UniversalApiContract, introduced version 1.0

Namespace

Windows.Security.Cryptography.Core
Windows::Security::Cryptography::Core [C++]

Metadata

Windows.Foundation.UniversalApiContract.winmd

Requirements (operating system)

Minimum supported client

Windows 8

Minimum supported server

Windows Server 2012

Minimum supported phone

Windows Phone 8.1 [Windows Runtime apps only]

Namespace

Windows.Security.Cryptography.Core
Windows::Security::Cryptography::Core [C++]

Metadata

Windows.winmd

See also

KeyDerivationAlgorithmNames
KeyDerivationAlgorithmProvider
KeyDerivationParameters

 

 

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