package hkdf

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RFC 5869 specifies a HMAC-based Extract-and-Expand Key Derivation Function (HKDF), which is abstracted over a specific hash function.

module type S = sig ... end

Given a Hash function, get the HKDF

val extract : hash:Mirage_crypto.Hash.hash -> ?salt:Cstruct.t -> Cstruct.t -> Cstruct.t

convenience extract hash salt ikm where the hash has to be provided explicitly

val expand : hash:Mirage_crypto.Hash.hash -> prk:Cstruct.t -> ?info:Cstruct.t -> int -> Cstruct.t

convenience expand hash prk info len where the hash has to be provided explicitly

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