Library crypto.hkdf | Standard libraries

Library hkdf

To use this library in your code:

import crypto.hkdf

HMAC-based Extract-and-Expand Key Derivation Function (HKDF).

See RFC 5869.

hkdf --ikm/ByteArray --salt/ByteArray --info/ByteArray --size/int [hasher-creator] -> ByteArray

Generic HKDF implementation.

The hasher-creator is a block that creates an HMAC object for a given key.

The size is the desired size of the output key in bytes.

hkdf-expand --prk/ByteArray --info/ByteArray --size/int [hasher-creator] -> ByteArray

HKDF-Expand step.

The size is the desired size of the output key in bytes.

HKDF-Extract step.

Derives a key using HKDF-SHA256.

The ikm is the input keying material.

The salt is optional.

The info is optional context information.

The size is the desired size of the output key in bytes.