hkdf

HMAC-based Extract-and-Expand Key Derivation Function (HKDF) in pure V Language. See RFC 5869 for more detail.

Contents

• new
• Hkdf
  • hasher
  • sum
  • size
  • hmac
  • extract
  • expand

new

fn new(h crypto.Hash) &Hkdf

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Hkdf

hasher

fn (k Hkdf) hasher() crypto.Hash

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sum

fn (k Hkdf) sum(data []u8) ![]u8

sum return sum of the data for Hkdf hash

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size

fn (k Hkdf) size() !int

size return size of the checksum underlying hash

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hmac

fn (k Hkdf) hmac(key []u8, data []u8) ![]u8

hmac create new hmac

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extract

fn (k Hkdf) extract(salt []u8, ikm []u8) ![]u8

extract create pseudorandom key (prk) from input given.
its output is hmac based hash with length (size) of Hashing checksum size

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expand

fn (k Hkdf) expand(prk []u8, info []u8, length int) ![]u8

// expand expand pseudorandom key to build output keying materi.
where length is the length of output keying material in octets (<= 255*HashLen) where HashLen denotes the length of the hash function output in octets

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