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"
#include "md5.h"
#include "crypto.h"

Include dependency graph for sha1-pbkdf2.c:

Go to the source code of this file.

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

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Detailed Description

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

Copyright

Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.

Alternatively, this software may be distributed under the terms of BSD license.

See README and COPYING for more details.

Definition in file sha1-pbkdf2.c.

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Function Documentation

int pbkdf2_sha1	(	const char *	passphrase,
		const char *	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.

Definition at line 82 of file sha1-pbkdf2.c.