keyderivationparameters_buildforsp800108_1459175055.md

-api-id	-api-type
M:Windows.Security.Cryptography.Core.KeyDerivationParameters.BuildForSP800108(Windows.Storage.Streams.IBuffer,Windows.Storage.Streams.IBuffer)	winrt method

Windows.Security.Cryptography.Core.KeyDerivationParameters.BuildForSP800108

-description

Creates a KeyDerivationParameters object for use in a counter mode, hash-based message authentication code (HMAC) key derivation function.

-parameters

-param label

Buffer that specifies the purpose for the derived keying material.

-param context

Buffer that specifies information related to the derived keying material. For example, the context can identify the parties who are deriving the keying material and, optionally, a nonce known by the parties.

-returns

Refers to the parameters used during key derivation.

-remarks

You can use the following algorithm names with the OpenAlgorithm function to open a SP800108 KDF algorithm provider:

• KeyDerivationAlgorithmNames.Sp800108CtrHmacMd5
• KeyDerivationAlgorithmNames.Sp800108CtrHmacSha1
• KeyDerivationAlgorithmNames.Sp800108CtrHmacSha256
• KeyDerivationAlgorithmNames.Sp800108CtrHmacSha384
• KeyDerivationAlgorithmNames.Sp800108CtrHmacSha512

-examples

[!code-csharpShowDerivationFromSP800108]

-see-also