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/*
* cifra - embedded cryptography library
* Written in 2014 by Joseph Birr-Pixton <jpixton@gmail.com>
*
* To the extent possible under law, the author(s) have dedicated all
* copyright and related and neighboring rights to this software to the
* public domain worldwide. This software is distributed without any
* warranty.
*
* You should have received a copy of the CC0 Public Domain Dedication
* along with this software. If not, see
* <http://creativecommons.org/publicdomain/zero/1.0/>.
*/
#ifndef PBKDF2_H
#define PBKDF2_H
#include <stddef.h>
#include <stdint.h>
#include "chash.h"
/**
* PBKDF2-HMAC
* ===========
* This is PBKDF2 as described by PKCS#5/RFC2898 with HMAC as the PRF.
*/
/* .. c:function:: $DECL
* This computes PBKDF2-HMAC with the given hash functon.
*
* :param pw: password input buffer.
* :param npw: password length.
* :param salt: salt input buffer.
* :param nsalt: salt length.
* :param iterations: non-zero iteration count. Tune this for performance/security tradeoff.
* :param out: key material output buffer. `nout` bytes are written here.
* :param nout: key material length.
* :param hash: hash function description.
*/
void cf_pbkdf2_hmac(const uint8_t *pw, size_t npw,
const uint8_t *salt, size_t nsalt,
uint32_t iterations,
uint8_t *out, size_t nout,
const cf_chash *hash);
#endif
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