The digest algorithm to use.
The salt value. Must be provided but can be zero-length.
Additional info value. Must be provided but can be zero-length, and cannot be more than 1024 bytes.
The length of the key to generate. Must be greater than 0. The maximum allowable value is 255 times the number of bytes produced by the selected digest function (e.g. sha512
generates 64-byte hashes, making the maximum HKDF output 16320 bytes).
HKDF is a simple key derivation function defined in RFC 5869. The given ikm,salt and info are used with the digest to derive a key of keylen bytes.
The supplied callback function is called with two arguments: err andderivedKey. If an errors occurs while deriving the key, err will be set;
otherwise err will be null. The successfully generated derivedKey will
be passed to the callback as an ArrayBuffer. An error will be thrown if any
of the input arguments specify invalid values or types.
import { Buffer } from 'buffer';
const {
hkdf
} = await import('crypto');
hkdf('sha512', 'key', 'salt', 'info', 64, (err, derivedKey) => {
if (err) throw err;
console.log(Buffer.from(derivedKey).toString('hex')); // '24156e2...5391653'
});
The digest algorithm to use.
The salt value. Must be provided but can be zero-length.
Additional info value. Must be provided but can be zero-length, and cannot be more than 1024 bytes.
The length of the key to generate. Must be greater than 0. The maximum allowable value is 255 times the number of bytes produced by the selected digest function (e.g. sha512
generates 64-byte hashes, making the maximum HKDF output 16320 bytes).
Generated using TypeDoc
HKDF is a simple key derivation function defined in RFC 5869. The given
ikm,saltandinfoare used with thedigestto derive a key ofkeylenbytes.The supplied
callbackfunction is called with two arguments:errandderivedKey. If an errors occurs while deriving the key,errwill be set; otherwiseerrwill benull. The successfully generatedderivedKeywill be passed to the callback as an ArrayBuffer. An error will be thrown if any of the input arguments specify invalid values or types.