sha1-pbkdf2.c File Reference

SHA1-based key derivation function (PBKDF2) for IEEE 802.11i. More...

#include "includes.h"
#include "common.h"
#include "sha1.h"

Functions
int	pbkdf2_sha1 (const char *passphrase, const u8 *ssid, size_t ssid_len, int iterations, u8 *buf, size_t buflen)
	SHA1-based key derivation function (PBKDF2) for IEEE 802.11i. More...

Detailed Description

SHA1-based key derivation function (PBKDF2) for IEEE 802.11i.

Function Documentation

int pbkdf2_sha1	(	const char *	passphrase,
		const u8 *	ssid,
		size_t	ssid_len,
		int	iterations,
		u8 *	buf,
		size_t	buflen
	)

SHA1-based key derivation function (PBKDF2) for IEEE 802.11i.

Parameters

passphrase	ASCII passphrase
ssid	SSID
ssid_len	SSID length in bytes
iterations	Number of iterations to run
buf	Buffer for the generated key
buflen	Length of the buffer in bytes

Returns

0 on success, -1 of failure

This function is used to derive PSK for WPA-PSK. For this protocol, iterations is set to 4096 and buflen to 32. This function is described in IEEE Std 802.11-2004, Clause H.4. The main construction is from PKCS#5 v2.0.