rtw_security.h

/******************************************************************************
 *
 * Copyright(c) 2007 - 2017 Realtek Corporation.
 *
 * 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.
 *
 *****************************************************************************/
#ifndef __RTW_SECURITY_H_
#define __RTW_SECURITY_H_


#define _NO_PRIVACY_		0x0
#define _WEP40_				0x1
#define _TKIP_				0x2
#define _TKIP_WTMIC_		0x3
#define _AES_				0x4
#define _WEP104_			0x5
#define _SMS4_				0x06
#define _WEP_WPA_MIXED_		0x07 /* WEP + WPA */
#define _BIP_				0x8

/* 802.11W use wrong key */
#define IEEE80211W_RIGHT_KEY	0x0
#define IEEE80211W_WRONG_KEY	0x1
#define IEEE80211W_NO_KEY		0x2

#define CCMPH_2_PN(ch)	((ch) & 0x000000000000ffff) \
			| (((ch) & 0xffffffff00000000) >> 16)

#define is_wep_enc(alg) (((alg) == _WEP40_) || ((alg) == _WEP104_))

const char *security_type_str(u8 value);

#define _WPA_IE_ID_	0xdd
#define _WPA2_IE_ID_	0x30

#define RTW_SHA256_MAC_LEN 32
#define AES_BLOCK_SIZE 16
#define AES_PRIV_SIZE (4 * 44)

#define RTW_KEK_LEN 16
#define RTW_KCK_LEN 16
#define RTW_TKIP_MIC_LEN 8
#define RTW_REPLAY_CTR_LEN 8

#define INVALID_SEC_MAC_CAM_ID	0xFF

typedef enum {
	ENCRYP_PROTOCOL_OPENSYS,   /* open system */
	ENCRYP_PROTOCOL_WEP,       /* WEP */
	ENCRYP_PROTOCOL_WPA,       /* WPA */
	ENCRYP_PROTOCOL_WPA2,      /* WPA2 */
	ENCRYP_PROTOCOL_WAPI,      /* WAPI: Not support in this version */
	ENCRYP_PROTOCOL_MAX
} ENCRYP_PROTOCOL_E;


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

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

union pn48	{

	u64	val;

#ifdef CONFIG_LITTLE_ENDIAN

struct {
	u8 TSC0;
	u8 TSC1;
	u8 TSC2;
	u8 TSC3;
	u8 TSC4;
	u8 TSC5;
	u8 TSC6;
	u8 TSC7;
} _byte_;

#elif defined(CONFIG_BIG_ENDIAN)

struct {
	u8 TSC7;
	u8 TSC6;
	u8 TSC5;
	u8 TSC4;
	u8 TSC3;
	u8 TSC2;
	u8 TSC1;
	u8 TSC0;
} _byte_;

#endif

};

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


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


struct security_priv {
	u32	  dot11AuthAlgrthm;		/* 802.11 auth, could be open, shared, 8021x and authswitch */
	u32	  dot11PrivacyAlgrthm;	/* This specify the privacy for shared auth. algorithm. */

	/* WEP */
	u32	  dot11PrivacyKeyIndex;	/* this is only valid for legendary wep, 0~3 for key id. (tx key index) */
	union Keytype dot11DefKey[6];			/* this is only valid for def. key	 */
	u32	dot11DefKeylen[6];
	u8	dot11Def_camid[6];
	u8 	key_mask; /* use to restore wep key after hal_init */

	u32 dot118021XGrpPrivacy;	/* This specify the privacy algthm. used for Grp key */
	u32	dot118021XGrpKeyid;		/* key id used for Grp Key ( tx key index) */
	union Keytype	dot118021XGrpKey[6];	/* 802.1x Group Key, for inx0 and inx1	 */
	union Keytype	dot118021XGrptxmickey[6];
	union Keytype	dot118021XGrprxmickey[6];
	union pn48		dot11Grptxpn;			/* PN48 used for Grp Key xmit. */
	union pn48		dot11Grprxpn;			/* PN48 used for Grp Key recv. */
	u8				iv_seq[4][8];
#ifdef CONFIG_IEEE80211W
	u32	dot11wBIPKeyid;						/* key id used for BIP Key ( tx key index) */
	union Keytype	dot11wBIPKey[6];		/* BIP Key, for index4 and index5 */
	union pn48		dot11wBIPtxpn;			/* PN48 used for BIP xmit. */
	union pn48		dot11wBIPrxpn;			/* PN48 used for BIP recv. */
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_AP_MODE
	/* extend security capabilities for AP_MODE */
	unsigned int dot8021xalg;/* 0:disable, 1:psk, 2:802.1x */
	unsigned int wpa_psk;/* 0:disable, bit(0): WPA, bit(1):WPA2 */
	unsigned int wpa_group_cipher;
	unsigned int wpa2_group_cipher;
	unsigned int wpa_pairwise_cipher;
	unsigned int wpa2_pairwise_cipher;
	u8 mfp_opt;
#endif
#ifdef CONFIG_CONCURRENT_MODE
	u8	dot118021x_bmc_cam_id;
#endif
	/*IEEE802.11-2012 Std. Table 8-101 AKM Suite Selectors*/
	u32	rsn_akm_suite_type;

	u8 wps_ie[MAX_WPS_IE_LEN];/* added in assoc req */
	int wps_ie_len;


	u8	binstallGrpkey;
#ifdef CONFIG_GTK_OL
	u8	binstallKCK_KEK;
#endif /* CONFIG_GTK_OL */
#ifdef CONFIG_IEEE80211W
	u8	binstallBIPkey;
#endif /* CONFIG_IEEE80211W */
	u8	busetkipkey;
	u8	bcheck_grpkey;
	u8	bgrpkey_handshake;

	/* u8	packet_cnt; */ /* unused, removed */

	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. */


	/* keeps the auth_type & enc_status from upper layer ioctl(wpa_supplicant or wzc) */
	u32 ndisauthtype;	/* NDIS_802_11_AUTHENTICATION_MODE */
	u32 ndisencryptstatus;	/* NDIS_802_11_ENCRYPTION_STATUS */

	NDIS_802_11_WEP ndiswep;
#ifdef PLATFORM_WINDOWS
	u8 KeyMaterial[16];/* variable length depending on above field. */
#endif

	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 */
	systime last_mic_err_time;
	u8	btkip_countermeasure;
	u8	btkip_wait_report;
	systime btkip_countermeasure_time;

	/* --------------------------------------------------------------------------- */
	/* For WPA2 Pre-Authentication. */
	/* --------------------------------------------------------------------------- */
	/* u8				RegEnablePreAuth;				 */ /* Default value: Pre-Authentication enabled or not, from registry "EnablePreAuth". Added by Annie, 2005-11-01. */
	/* u8				EnablePreAuthentication;			 */ /* Current Value: Pre-Authentication enabled or not. */
	RT_PMKID_LIST		PMKIDList[NUM_PMKID_CACHE];	/* Renamed from PreAuthKey[NUM_PRE_AUTH_KEY]. Annie, 2006-10-13. */
	u8				PMKIDIndex;
	/* u32				PMKIDCount;						 */ /* Added by Annie, 2006-10-13. */
	/* u8				szCapability[256];				 */ /* For WPA2-PSK using zero-config, by Annie, 2005-09-20. */

	u8 bWepDefaultKeyIdxSet;

#define DBG_SW_SEC_CNT
#ifdef DBG_SW_SEC_CNT
	u64 wep_sw_enc_cnt_bc;
	u64 wep_sw_enc_cnt_mc;
	u64 wep_sw_enc_cnt_uc;
	u64 wep_sw_dec_cnt_bc;
	u64 wep_sw_dec_cnt_mc;
	u64 wep_sw_dec_cnt_uc;

	u64 tkip_sw_enc_cnt_bc;
	u64 tkip_sw_enc_cnt_mc;
	u64 tkip_sw_enc_cnt_uc;
	u64 tkip_sw_dec_cnt_bc;
	u64 tkip_sw_dec_cnt_mc;
	u64 tkip_sw_dec_cnt_uc;

	u64 aes_sw_enc_cnt_bc;
	u64 aes_sw_enc_cnt_mc;
	u64 aes_sw_enc_cnt_uc;
	u64 aes_sw_dec_cnt_bc;
	u64 aes_sw_dec_cnt_mc;
	u64 aes_sw_dec_cnt_uc;
#endif /* DBG_SW_SEC_CNT */
};

#ifdef CONFIG_IEEE80211W
#define SEC_IS_BIP_KEY_INSTALLED(sec) ((sec)->binstallBIPkey)
#else
#define SEC_IS_BIP_KEY_INSTALLED(sec) _FALSE
#endif

struct rtw_sha256_state {
	u64 length;
	u32 state[8], curlen;
	u8 buf[64];
};

#define GET_ENCRY_ALGO(psecuritypriv, psta, encry_algo, bmcst)\
	do {\
		switch (psecuritypriv->dot11AuthAlgrthm) {\
		case dot11AuthAlgrthm_Open:\
		case dot11AuthAlgrthm_Shared:\
		case dot11AuthAlgrthm_Auto:\
			encry_algo = (u8)psecuritypriv->dot11PrivacyAlgrthm;\
			break;\
		case dot11AuthAlgrthm_8021X:\
			if (bmcst)\
				encry_algo = (u8)psecuritypriv->dot118021XGrpPrivacy;\
			else\
				encry_algo = (u8) psta->dot118021XPrivacy;\
			break;\
		case dot11AuthAlgrthm_WAPI:\
			encry_algo = (u8)psecuritypriv->dot11PrivacyAlgrthm;\
			break;\
		} \
	} while (0)

#define _AES_IV_LEN_ 8

#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;\
		case _SMS4_:\
			iv_len = 18;\
			icv_len = 16;\
			break;\
		default:\
			iv_len = 0;\
			icv_len = 0;\
			break;\
		} \
	} while (0)


#define GET_TKIP_PN(iv, dot11txpn)\
	do {\
		dot11txpn._byte_.TSC0 = iv[2];\
		dot11txpn._byte_.TSC1 = iv[0];\
		dot11txpn._byte_.TSC2 = iv[4];\
		dot11txpn._byte_.TSC3 = iv[5];\
		dot11txpn._byte_.TSC4 = iv[6];\
		dot11txpn._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 */
};

extern const u32 Te0[256];
extern const u32 Te1[256];
extern const u32 Te2[256];
extern const u32 Te3[256];
extern const u32 Te4[256];
extern const u32 Td0[256];
extern const u32 Td1[256];
extern const u32 Td2[256];
extern const u32 Td3[256];
extern const u32 Td4[256];
extern const u32 rcon[10];
extern const u8 Td4s[256];
extern const u8 rcons[10];

#define RCON(i) (rcons[(i)] << 24)

static inline u32 rotr(u32 val, int bits)
{
	return (val >> bits) | (val << (32 - bits));
}

#define TE0(i) Te0[((i) >> 24) & 0xff]
#define TE1(i) rotr(Te0[((i) >> 16) & 0xff], 8)
#define TE2(i) rotr(Te0[((i) >> 8) & 0xff], 16)
#define TE3(i) rotr(Te0[(i) & 0xff], 24)
#define TE41(i) ((Te0[((i) >> 24) & 0xff] << 8) & 0xff000000)
#define TE42(i) (Te0[((i) >> 16) & 0xff] & 0x00ff0000)
#define TE43(i) (Te0[((i) >> 8) & 0xff] & 0x0000ff00)
#define TE44(i) ((Te0[(i) & 0xff] >> 8) & 0x000000ff)
#define TE421(i) ((Te0[((i) >> 16) & 0xff] << 8) & 0xff000000)
#define TE432(i) (Te0[((i) >> 8) & 0xff] & 0x00ff0000)
#define TE443(i) (Te0[(i) & 0xff] & 0x0000ff00)
#define TE414(i) ((Te0[((i) >> 24) & 0xff] >> 8) & 0x000000ff)
#define TE4(i) ((Te0[(i)] >> 8) & 0x000000ff)

#define TD0(i) Td0[((i) >> 24) & 0xff]
#define TD1(i) rotr(Td0[((i) >> 16) & 0xff], 8)
#define TD2(i) rotr(Td0[((i) >> 8) & 0xff], 16)
#define TD3(i) rotr(Td0[(i) & 0xff], 24)
#define TD41(i) (Td4s[((i) >> 24) & 0xff] << 24)
#define TD42(i) (Td4s[((i) >> 16) & 0xff] << 16)
#define TD43(i) (Td4s[((i) >> 8) & 0xff] << 8)
#define TD44(i) (Td4s[(i) & 0xff])
#define TD0_(i) Td0[(i) & 0xff]
#define TD1_(i) rotr(Td0[(i) & 0xff], 8)
#define TD2_(i) rotr(Td0[(i) & 0xff], 16)
#define TD3_(i) rotr(Td0[(i) & 0xff], 24)

#define GETU32(pt) (((u32)(pt)[0] << 24) ^ ((u32)(pt)[1] << 16) ^ \
			((u32)(pt)[2] <<  8) ^ ((u32)(pt)[3]))

#define PUTU32(ct, st) { \
		(ct)[0] = (u8)((st) >> 24); (ct)[1] = (u8)((st) >> 16); \
		(ct)[2] = (u8)((st) >>  8); (ct)[3] = (u8)(st); }

#define WPA_GET_BE32(a) ((((u32) (a)[0]) << 24) | (((u32) (a)[1]) << 16) | \
			 (((u32) (a)[2]) << 8) | ((u32) (a)[3]))

#define WPA_PUT_LE16(a, val)			\
	do {					\
		(a)[1] = ((u16) (val)) >> 8;	\
		(a)[0] = ((u16) (val)) & 0xff;	\
	} while (0)

#define WPA_PUT_BE32(a, val)					\
	do {							\
		(a)[0] = (u8) ((((u32) (val)) >> 24) & 0xff);	\
		(a)[1] = (u8) ((((u32) (val)) >> 16) & 0xff);	\
		(a)[2] = (u8) ((((u32) (val)) >> 8) & 0xff);	\
		(a)[3] = (u8) (((u32) (val)) & 0xff);		\
	} while (0)

#define WPA_PUT_BE64(a, val)				\
	do {						\
		(a)[0] = (u8) (((u64) (val)) >> 56);	\
		(a)[1] = (u8) (((u64) (val)) >> 48);	\
		(a)[2] = (u8) (((u64) (val)) >> 40);	\
		(a)[3] = (u8) (((u64) (val)) >> 32);	\
		(a)[4] = (u8) (((u64) (val)) >> 24);	\
		(a)[5] = (u8) (((u64) (val)) >> 16);	\
		(a)[6] = (u8) (((u64) (val)) >> 8);	\
		(a)[7] = (u8) (((u64) (val)) & 0xff);	\
	} while (0)

/* the K array */
static const unsigned long K[64] = {
	0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL, 0x3956c25bUL,
	0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL, 0xd807aa98UL, 0x12835b01UL,
	0x243185beUL, 0x550c7dc3UL, 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL,
	0xc19bf174UL, 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
	0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL, 0x983e5152UL,
	0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL, 0xc6e00bf3UL, 0xd5a79147UL,
	0x06ca6351UL, 0x14292967UL, 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL,
	0x53380d13UL, 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
	0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL, 0xd192e819UL,
	0xd6990624UL, 0xf40e3585UL, 0x106aa070UL, 0x19a4c116UL, 0x1e376c08UL,
	0x2748774cUL, 0x34b0bcb5UL, 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL,
	0x682e6ff3UL, 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
	0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
};


/* Various logical functions */
#define RORc(x, y) \
	(((((unsigned long) (x) & 0xFFFFFFFFUL) >> (unsigned long) ((y) & 31)) | \
	  ((unsigned long) (x) << (unsigned long) (32 - ((y) & 31)))) & 0xFFFFFFFFUL)
#define Ch(x, y, z)       (z ^ (x & (y ^ z)))
#define Maj(x, y, z)      (((x | y) & z) | (x & y))
#define S(x, n)         RORc((x), (n))
#define R(x, n)         (((x) & 0xFFFFFFFFUL)>>(n))
#define Sigma0(x)       (S(x, 2) ^ S(x, 13) ^ S(x, 22))
#define Sigma1(x)       (S(x, 6) ^ S(x, 11) ^ S(x, 25))
#define Gamma0(x)       (S(x, 7) ^ S(x, 18) ^ R(x, 3))
#define Gamma1(x)       (S(x, 17) ^ S(x, 19) ^ R(x, 10))
#ifndef MIN
#define MIN(x, y) (((x) < (y)) ? (x) : (y))
#endif
#ifdef CONFIG_IEEE80211W
int omac1_aes_128(const u8 *key, const u8 *data, size_t data_len, u8 *mac);
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_RTW_MESH_AEK
int aes_siv_encrypt(const u8 *key, const u8 *pw, size_t pwlen
	, size_t num_elem, const u8 *addr[], const size_t *len, u8 *out);
int aes_siv_decrypt(const u8 *key, const u8 *iv_crypt, size_t iv_c_len
	, size_t num_elem, const u8 *addr[], const size_t *len, u8 *out);
#endif
void rtw_secmicsetkey(struct mic_data *pmicdata, u8 *key);
void rtw_secmicappendbyte(struct mic_data *pmicdata, u8 b);
void rtw_secmicappend(struct mic_data *pmicdata, u8 *src, u32 nBytes);
void rtw_secgetmic(struct mic_data *pmicdata, u8 *dst);

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

u32 rtw_aes_encrypt(_adapter *padapter, u8 *pxmitframe);
u32 rtw_tkip_encrypt(_adapter *padapter, u8 *pxmitframe);
void rtw_wep_encrypt(_adapter *padapter, u8  *pxmitframe);

u32 rtw_aes_decrypt(_adapter *padapter, u8  *precvframe);
u32 rtw_tkip_decrypt(_adapter *padapter, u8  *precvframe);
void rtw_wep_decrypt(_adapter *padapter, u8  *precvframe);
#ifdef CONFIG_IEEE80211W
u32	rtw_BIP_verify(_adapter *padapter, u8 *whdr_pos, sint flen
	, const u8 *key, u16 id, u64* ipn);
#endif
#ifdef CONFIG_TDLS
void wpa_tdls_generate_tpk(_adapter *padapter, PVOID sta);
int wpa_tdls_ftie_mic(u8 *kck, u8 trans_seq,
			u8 *lnkid, u8 *rsnie, u8 *timeoutie, u8 *ftie,
			u8 *mic);
int wpa_tdls_teardown_ftie_mic(u8 *kck, u8 *lnkid, u16 reason,
			u8 dialog_token, u8 trans_seq, u8 *ftie, u8 *mic);
int tdls_verify_mic(u8 *kck, u8 trans_seq,
			u8 *lnkid, u8 *rsnie, u8 *timeoutie, u8 *ftie);
#endif /* CONFIG_TDLS */

void rtw_sec_restore_wep_key(_adapter *adapter);
u8 rtw_handle_tkip_countermeasure(_adapter *adapter, const char *caller);

#ifdef CONFIG_WOWLAN
u16 rtw_calc_crc(u8  *pdata, int length);
#endif /*CONFIG_WOWLAN*/

#endif /* __RTL871X_SECURITY_H_ */