/****************************************************************************
 * net/ieee80211/ieee80211_crypto.h
 * 802.11 protocol crypto-related definitions.
 *
 * Copyright (c) 2007, 2008 Damien Bergamini <damien.bergamini@free.fr>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 ****************************************************************************/

#ifndef __INCLUDE_NUTTX_WIRELESS_IEEE80211_IEEE80211_CRYPTO_H
#define __INCLUDE_NUTTX_WIRELESS_IEEE80211_IEEE80211_CRYPTO_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

#define IEEE80211_KEYBUF_SIZE    16

#define IEEE80211_TKIP_HDRLEN    8
#define IEEE80211_TKIP_MICLEN    8
#define IEEE80211_TKIP_ICVLEN    4
#define IEEE80211_CCMP_HDRLEN    8
#define IEEE80211_CCMP_MICLEN    8

#define IEEE80211_PMK_LEN    32

/****************************************************************************
 * Public Types
 ****************************************************************************/

/* 802.11 ciphers */

enum ieee80211_cipher
{
  IEEE80211_CIPHER_NONE      = 0x00000000,
  IEEE80211_CIPHER_USEGROUP  = 0x00000001,
  IEEE80211_CIPHER_WEP40     = 0x00000002,
  IEEE80211_CIPHER_TKIP      = 0x00000004,
  IEEE80211_CIPHER_CCMP      = 0x00000008,
  IEEE80211_CIPHER_WEP104    = 0x00000010,
  IEEE80211_CIPHER_BIP       = 0x00000020   /* 11w */
};

/* 802.11 Authentication and Key Management Protocols */

enum ieee80211_akm
{
  IEEE80211_AKM_NONE         = 0x00000000,
  IEEE80211_AKM_8021X        = 0x00000001,
  IEEE80211_AKM_PSK          = 0x00000002,
  IEEE80211_AKM_SHA256_8021X = 0x00000004,  /* 11w */
  IEEE80211_AKM_SHA256_PSK   = 0x00000008   /* 11w */
};

struct ieee80211_key
{
  uint8_t k_id;                             /* Identifier (0-5) */
  enum ieee80211_cipher k_cipher;
  unsigned int k_flags;

#define IEEE80211_KEY_GROUP    0x00000001   /* Group data key */
#define IEEE80211_KEY_TX       0x00000002   /* Tx+Rx */
#define IEEE80211_KEY_IGTK     0x00000004   /* Integrity group key */

  unsigned int k_len;
  uint64_t k_rsc[IEEE80211_NUM_TID];
  uint64_t k_mgmt_rsc;
  uint64_t k_tsc;
  uint8_t k_key[32];
  FAR void *k_priv;
};

/* Entry in the PMKSA cache */

struct ieee80211_pmk
{
  sq_entry_t pmk_next;
  enum ieee80211_akm pmk_akm;
  uint32_t pmk_lifetime;

#define IEEE80211_PMK_INFINITE  0

  uint8_t pmk_pmkid[IEEE80211_PMKID_LEN];
  uint8_t pmk_macaddr[IEEE80211_ADDR_LEN];
  uint8_t pmk_key[IEEE80211_PMK_LEN];
};

/****************************************************************************
 * Inline Functions
 ****************************************************************************/

static __inline int ieee80211_is_8021x_akm(enum ieee80211_akm akm)
{
  return akm == IEEE80211_AKM_8021X || akm == IEEE80211_AKM_SHA256_8021X;
}

static __inline int ieee80211_is_sha256_akm(enum ieee80211_akm akm)
{
  return akm == IEEE80211_AKM_SHA256_8021X || akm == IEEE80211_AKM_SHA256_PSK;
}

#endif /* __INCLUDE_NUTTX_WIRELESS_IEEE80211_IEEE80211_CRYPTO_H */