Class HKDF

HMAC-based Extract-and-Expand Key Derivation Function.

Implements HKDF from RFC5869.

Expands the given master key with salt and info into a limited stream of key material.

Index

Constructors

Methods

Constructors

constructor

new HKDF(hash, key, salt?, info?): HKDF
Create a new HKDF instance for the given hash function with the master key, optional salt, and info.
- Master key is a high-entropy secret key (not a password).
- Salt is a non-secret random value.
- Info is application- and/or context-specific information.
Parameters
- hash: (new () => Hash)
  - - new (): Hash
    - Returns Hash
- key: Uint8Array
- salt: Uint8Array = ...
- Optionalinfo: Uint8Array
Returns HKDF
- Defined in hkdf.ts:36

Methods

clean

clean(): void
Returns void
- Defined in hkdf.ts:108

expand

expand(length): Uint8Array
Expand returns next key material of the given length.

It throws if expansion limit is reached (which is 254 digests of the underlying HMAC function).
Parameters
- length: number
Returns Uint8Array
- Defined in hkdf.ts:97