drivers/staging/rtl8723bs/include/rtw_security.h

/* SPDX-License-Identifier: GPL-2.0 */
/******************************************************************************
 *
 * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
 *
 ******************************************************************************/
#ifndef __RTW_SECURITY_H_
#define __RTW_SECURITY_H_

#include <crypto/arc4.h>

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

const char *security_type_str(u8 value);

#define 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_REPLAY_CTR_LEN 8

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
};


#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 __LITTLE_ENDIAN

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


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   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[4];	/*  this is only valid for def. key */
	u32 dot11DefKeylen[4];
	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[BIP_MAX_KEYID];	/*  802.1x Group Key, for inx0 and inx1 */
	union Keytype	dot118021XGrptxmickey[BIP_MAX_KEYID];
	union Keytype	dot118021XGrprxmickey[BIP_MAX_KEYID];
	union pn48		dot11Grptxpn;			/*  PN48 used for Grp Key xmit. */
	union pn48		dot11Grprxpn;			/*  PN48 used for Grp Key recv. */
	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 Grp Key xmit. */
	union pn48		dot11wBIPrxpn;			/*  PN48 used for Grp Key recv. */

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

	struct arc4_ctx xmit_arc4_ctx;
	struct arc4_ctx recv_arc4_ctx;

	u8 binstallGrpkey;
	u8 binstallBIPkey;
	u8 busetkipkey;
	/* _timer 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. */


	/* keeps the auth_type & enc_status from upper layer ioctl(wpa_supplicant or wzc) */
	u32 ndisauthtype;	/*  enum ndis_802_11_authentication_mode */
	u32 ndisencryptstatus;	/*  NDIS_802_11_ENCRYPTION_STATUS */

	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 */
	unsigned long 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];	/*  Renamed from PreAuthKey[NUM_PRE_AUTH_KEY]. Annie, 2006-10-13. */
	u8 		PMKIDIndex;

	u8 bWepDefaultKeyIdxSet;

};

#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 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 */
};

/* ===== start - public domain SHA256 implementation ===== */

/* This is based on SHA256 implementation in LibTomCrypt that was released into
 * public domain by Tom St Denis. */

int omac1_aes_128(u8 *key, u8 *data, size_t data_len, u8 *mac);
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(struct adapter *padapter, u8 *pxmitframe);
u32 rtw_tkip_encrypt(struct adapter *padapter, u8 *pxmitframe);
void rtw_wep_encrypt(struct adapter *padapter, u8  *pxmitframe);

u32 rtw_aes_decrypt(struct adapter *padapter, u8  *precvframe);
u32 rtw_tkip_decrypt(struct adapter *padapter, u8  *precvframe);
void rtw_wep_decrypt(struct adapter *padapter, u8  *precvframe);
u32 rtw_BIP_verify(struct adapter *padapter, u8 *precvframe);

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

#endif	/* __RTL871X_SECURITY_H_ */