/******************************************************************************
 *
 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * Modifications for inclusion into the Linux staging tree are
 * Copyright(c) 2010 Larry Finger. All rights reserved.
 *
 * Contact information:
 * WLAN FAE <wlanfae@realtek.com>
 * Larry Finger <Larry.Finger@lwfinger.net>
 *
 ******************************************************************************/
#ifndef __RTL871X_SECURITY_H_
#define __RTL871X_SECURITY_H_

#include "osdep_service.h"
#include "drv_types.h"

#define _NO_PRIVACY_    0x0
#define _WEP40_         0x1
#define _TKIP_          0x2
#define _TKIP_WTMIC_    0x3
#define _AES_           0x4
#define _WEP104_        0x5

#define _WPA_IE_ID_     0xdd
#define _WPA2_IE_ID_    0x30

#ifndef Ndis802_11AuthModeWPA2
#define Ndis802_11AuthModeWPA2 (Ndis802_11AuthModeWPANone + 1)
#endif

#ifndef Ndis802_11AuthModeWPA2PSK
#define Ndis802_11AuthModeWPA2PSK (Ndis802_11AuthModeWPANone + 2)
#endif

union pn48 {
        u64 val;
#if defined(__BIG_ENDIAN)
        struct {
                u8 TSC7;
                u8 TSC6;
                u8 TSC5;
                u8 TSC4;
                u8 TSC3;
                u8 TSC2;
                u8 TSC1;
                u8 TSC0;
        } _byte_;
#else
        struct {
                u8 TSC0;
                u8 TSC1;
                u8 TSC2;
                u8 TSC3;
                u8 TSC4;
                u8 TSC5;
                u8 TSC6;
                u8 TSC7;
        } _byte_;
#endif
};

union Keytype {
        u8 skey[16];
        u32 lkey[4];
};

struct RT_PMKID_LIST {
        u8 bUsed;
        u8 Bssid[6];
        u8 PMKID[16];
        u8 SsidBuf[33];
        u8 *ssid_octet;
        u16 ssid_length;
};

struct security_priv {
        u32 AuthAlgrthm;                /* 802.11 auth, could be open, shared,
                                         * 8021x and authswitch
                                         */
        u32 PrivacyAlgrthm;             /* This specify the privacy for shared
                                         * auth. algorithm.
                                         */
        u32 PrivacyKeyIndex;            /* this is only valid for legendary
                                         * wep, 0~3 for key id.
                                         */
        union Keytype DefKey[4];        /* this is only valid for def. key */
        u32 DefKeylen[4];
        u32 XGrpPrivacy;                /* This specify the privacy algthm.
                                         * used for Grp key
                                         */
        u32 XGrpKeyid;                  /* key id used for Grp Key */
        union Keytype   XGrpKey[2];     /* 802.1x Group Key, for
                                         * inx0 and inx1
                                         */
        union Keytype   XGrptxmickey[2];
        union Keytype   XGrprxmickey[2];
        union pn48 Grptxpn;             /* PN48 used for Grp Key xmit. */
        union pn48 Grprxpn;             /* PN48 used for Grp Key recv. */
        u8 wps_hw_pbc_pressed;/*for hw pbc pressed*/
        u8 wps_phase;/*for wps*/
        u8 wps_ie[MAX_WPA_IE_LEN<<2];
        int wps_ie_len;
        u8      binstallGrpkey;
        u8      busetkipkey;
        struct timer_list tkip_timer;
        u8      bcheck_grpkey;
        u8      bgrpkey_handshake;
        s32     sw_encrypt;     /* from registry_priv */
        s32     sw_decrypt;     /* from registry_priv */
        s32     hw_decrypted;   /* if the rx packets is hw_decrypted==false,
                                 * it means the hw has not been ready.
                                 */
        u32 ndisauthtype;       /* keeps the auth_type & enc_status from upper
                                 * layer ioctl(wpa_supplicant or wzc)
                                 */
        u32 ndisencryptstatus;
        struct wlan_bssid_ex sec_bss;  /* for joinbss (h2c buffer) usage */
        struct NDIS_802_11_WEP ndiswep;
        u8 assoc_info[600];
        u8 szofcapability[256]; /* for wpa2 usage */
        u8 oidassociation[512]; /* for wpa/wpa2 usage */
        u8 authenticator_ie[256];  /* store ap security information element */
        u8 supplicant_ie[256];  /* store sta security information element */
        /* for tkip countermeasure */
        u32 last_mic_err_time;
        u8      btkip_countermeasure;
        u8      btkip_wait_report;
        u32 btkip_countermeasure_time;
        /*-------------------------------------------------------------------
         * For WPA2 Pre-Authentication.
         *------------------------------------------------------------------
         **/
        struct RT_PMKID_LIST            PMKIDList[NUM_PMKID_CACHE];
        u8                              PMKIDIndex;
};

#define GET_ENCRY_ALGO(psecuritypriv, psta, encry_algo, bmcst) \
do { \
        switch (psecuritypriv->AuthAlgrthm) { \
        case 0: \
        case 1: \
        case 3: \
                encry_algo = (u8)psecuritypriv->PrivacyAlgrthm; \
                break; \
        case 2: \
                if (bmcst) \
                        encry_algo = (u8)psecuritypriv->XGrpPrivacy; \
                else \
                        encry_algo = (u8)psta->XPrivacy; \
                break; \
        } \
} while (0)
#define SET_ICE_IV_LEN(iv_len, icv_len, encrypt)\
do {\
        switch (encrypt) { \
        case _WEP40_: \
        case _WEP104_: \
                iv_len = 4; \
                icv_len = 4; \
                break; \
        case _TKIP_: \
                iv_len = 8; \
                icv_len = 4; \
                break; \
        case _AES_: \
                iv_len = 8; \
                icv_len = 8; \
                break; \
        default: \
                iv_len = 0; \
                icv_len = 0; \
                break; \
        } \
} while (0)
#define GET_TKIP_PN(iv, txpn) \
do {\
        txpn._byte_.TSC0 = iv[2];\
        txpn._byte_.TSC1 = iv[0];\
        txpn._byte_.TSC2 = iv[4];\
        txpn._byte_.TSC3 = iv[5];\
        txpn._byte_.TSC4 = iv[6];\
        txpn._byte_.TSC5 = iv[7];\
} while (0)

#define ROL32(A, n) (((A) << (n)) | (((A)>>(32-(n)))  & ((1UL << (n)) - 1)))
#define ROR32(A, n) ROL32((A), 32 - (n))

struct mic_data {
        u32  K0, K1;         /* Key */
        u32  L, R;           /* Current state */
        u32  M;              /* Message accumulator (single word) */
        u32  nBytesInM;      /* # bytes in M */
};

void seccalctkipmic(
        u8  *key,
        u8  *header,
        u8  *data,
        u32  data_len,
        u8  *Miccode,
        u8   priority);

void r8712_secmicsetkey(struct mic_data *pmicdata, u8 *key);
void r8712_secmicappend(struct mic_data *pmicdata, u8 *src, u32 nBytes);
void r8712_secgetmic(struct mic_data *pmicdata, u8 *dst);
u32 r8712_aes_encrypt(struct _adapter *padapter, u8 *pxmitframe);
u32 r8712_tkip_encrypt(struct _adapter *padapter, u8 *pxmitframe);
void r8712_wep_encrypt(struct _adapter *padapter, u8  *pxmitframe);
u32 r8712_aes_decrypt(struct _adapter *padapter, u8  *precvframe);
u32 r8712_tkip_decrypt(struct _adapter *padapter, u8  *precvframe);
void r8712_wep_decrypt(struct _adapter *padapter, u8  *precvframe);
void r8712_use_tkipkey_handler(struct timer_list *t);

#endif  /*__RTL871X_SECURITY_H_ */