/*
 * IKEv2 initiator (RFC 4306) for EAP-IKEV2
 * Copyright (c) 2007, 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.
 */

#ifndef IKEV2_H
#define IKEV2_H

#include "eap_common/ikev2_common.h"

struct ikev2_proposal_data {
	u8 proposal_num;
	int integ;
	int prf;
	int encr;
	int dh;
};


struct ikev2_initiator_data {
	enum { SA_INIT, SA_AUTH, CHILD_SA, IKEV2_DONE } state;
	u8 i_spi[IKEV2_SPI_LEN];
	u8 r_spi[IKEV2_SPI_LEN];
	u8 i_nonce[IKEV2_NONCE_MAX_LEN];
	size_t i_nonce_len;
	u8 r_nonce[IKEV2_NONCE_MAX_LEN];
	size_t r_nonce_len;
	struct wpabuf *r_dh_public;
	struct wpabuf *i_dh_private;
	struct ikev2_proposal_data proposal;
	const struct dh_group *dh;
	struct ikev2_keys keys;
	u8 *IDi;
	size_t IDi_len;
	u8 *IDr;
	size_t IDr_len;
	u8 IDr_type;
	struct wpabuf *r_sign_msg;
	struct wpabuf *i_sign_msg;
	u8 *shared_secret;
	size_t shared_secret_len;
	enum { PEER_AUTH_CERT, PEER_AUTH_SECRET } peer_auth;
	u8 *key_pad;
	size_t key_pad_len;

	const u8 * (*get_shared_secret)(void *ctx, const u8 *IDr,
					size_t IDr_len, size_t *secret_len);
	void *cb_ctx;
	int unknown_user;
};


void ikev2_initiator_deinit(struct ikev2_initiator_data *data);
int ikev2_initiator_process(struct ikev2_initiator_data *data,
			    const struct wpabuf *buf);
struct wpabuf * ikev2_initiator_build(struct ikev2_initiator_data *data);

#endif /* IKEV2_H */