eap_gpsk_common.c File Reference

EAP server/peer: EAP-GPSK shared routines. More...

#include "includes.h"
#include "common.h"
#include "crypto/aes_wrap.h"
#include "crypto/sha256.h"
#include "eap_defs.h"
#include "eap_gpsk_common.h"

Macros
#define	EAP_GPSK_SK_LEN_AES   16
#define	EAP_GPSK_PK_LEN_AES   16
#define	SID_LABEL   "Method ID"

Functions
int	eap_gpsk_supported_ciphersuite (int vendor, int specifier)
	Check whether ciphersuite is supported. More...
int	eap_gpsk_derive_keys (const u8 *psk, size_t psk_len, int vendor, int specifier, const u8 *rand_peer, const u8 *rand_server, const u8 *id_peer, size_t id_peer_len, const u8 *id_server, size_t id_server_len, u8 *msk, u8 *emsk, u8 *sk, size_t *sk_len, u8 *pk, size_t *pk_len)
	Derive EAP-GPSK keys. More...
int	eap_gpsk_derive_session_id (const u8 *psk, size_t psk_len, int vendor, int specifier, const u8 *rand_peer, const u8 *rand_server, const u8 *id_peer, size_t id_peer_len, const u8 *id_server, size_t id_server_len, u8 method_type, u8 *sid, size_t *sid_len)
	Derive EAP-GPSK Session ID. More...
size_t	eap_gpsk_mic_len (int vendor, int specifier)
	Get the length of the MIC. More...
int	eap_gpsk_compute_mic (const u8 *sk, size_t sk_len, int vendor, int specifier, const u8 *data, size_t len, u8 *mic)
	Compute EAP-GPSK MIC for an EAP packet. More...

Detailed Description

EAP server/peer: EAP-GPSK shared routines.

Function Documentation

int eap_gpsk_compute_mic	(	const u8 *	sk,
		size_t	sk_len,
		int	vendor,
		int	specifier,
		const u8 *	data,
		size_t	len,
		u8 *	mic
	)

Compute EAP-GPSK MIC for an EAP packet.

Parameters

sk	Session key SK from eap_gpsk_derive_keys()
sk_len	SK length in bytes from eap_gpsk_derive_keys()
vendor	CSuite/Vendor
specifier	CSuite/Specifier
data	Input data to MIC
len	Input data length in bytes
mic	Buffer for the computed MIC, eap_gpsk_mic_len(cipher) bytes

Returns

0 on success, -1 on failure

int eap_gpsk_derive_keys	(	const u8 *	psk,
		size_t	psk_len,
		int	vendor,
		int	specifier,
		const u8 *	rand_peer,
		const u8 *	rand_server,
		const u8 *	id_peer,
		size_t	id_peer_len,
		const u8 *	id_server,
		size_t	id_server_len,
		u8 *	msk,
		u8 *	emsk,
		u8 *	sk,
		size_t *	sk_len,
		u8 *	pk,
		size_t *	pk_len
	)

Derive EAP-GPSK keys.

Parameters

psk	Pre-shared key
psk_len	Length of psk in bytes
vendor	CSuite/Vendor
specifier	CSuite/Specifier
rand_peer	32-byte RAND_Peer
rand_server	32-byte RAND_Server
id_peer	ID_Peer
id_peer_len	Length of ID_Peer
id_server	ID_Server
id_server_len	Length of ID_Server
msk	Buffer for 64-byte MSK
emsk	Buffer for 64-byte EMSK
sk	Buffer for SK (at least EAP_GPSK_MAX_SK_LEN bytes)
sk_len	Buffer for returning length of SK
pk	Buffer for PK (at least EAP_GPSK_MAX_PK_LEN bytes)
pk_len	Buffer for returning length of PK

Returns

0 on success, -1 on failure

int eap_gpsk_derive_session_id	(	const u8 *	psk,
		size_t	psk_len,
		int	vendor,
		int	specifier,
		const u8 *	rand_peer,
		const u8 *	rand_server,
		const u8 *	id_peer,
		size_t	id_peer_len,
		const u8 *	id_server,
		size_t	id_server_len,
		u8	method_type,
		u8 *	sid,
		size_t *	sid_len
	)

Derive EAP-GPSK Session ID.

Parameters

psk	Pre-shared key
psk_len	Length of psk in bytes
vendor	CSuite/Vendor
specifier	CSuite/Specifier
rand_peer	32-byte RAND_Peer
rand_server	32-byte RAND_Server
id_peer	ID_Peer
id_peer_len	Length of ID_Peer
id_server	ID_Server
id_server_len	Length of ID_Server
method_type	EAP Authentication Method Type
sid	Buffer for 17-byte Session ID
sid_len	Buffer for returning length of Session ID

Returns

0 on success, -1 on failure

size_t eap_gpsk_mic_len	(	int	vendor,
		int	specifier
	)

Get the length of the MIC.

Parameters

vendor	CSuite/Vendor
specifier	CSuite/Specifier

Returns

MIC length in bytes

int eap_gpsk_supported_ciphersuite	(	int	vendor,
		int	specifier
	)

Check whether ciphersuite is supported.

Parameters

vendor	CSuite/Vendor
specifier	CSuite/Specifier

Returns

1 if ciphersuite is support, or 0 if not