Struct Hkdf 

pub struct Hkdf<H: Digest> { /* private fields */ }

HKDF key schedule state holding one pseudorandom key (PRK).

Implementations

impl<H: Digest> Hkdf<H>

pub fn extract(salt: Option<&[u8]>, ikm: &[u8]) -> Self

Extract one pseudorandom key from input keying material.

If salt is None, RFC 5869 uses a digest-length all-zero salt.

pub fn from_prk(prk: &[u8]) -> Option<Self>

Build an HKDF state from a previously extracted PRK.

RFC 5869 defines PRK as one digest-width string.

pub fn prk(&self) -> &[u8]

Return the extracted pseudorandom key.

pub fn expand(&self, info: &[u8], out: &mut [u8]) -> bool

Expand into out with caller-supplied context info.

Returns false if out exceeds 255 * H::OUTPUT_LEN, as required by RFC 5869.

pub fn derive( salt: Option<&[u8]>, ikm: &[u8], info: &[u8], len: usize, ) -> Option<Vec<u8>>

Convenience one-shot HKDF (extract + expand).

Trait Implementations

impl<H: Digest> Drop for Hkdf<H>

fn drop(&mut self)

Executes the destructor for this type.