// SPDX-License-Identifier: GPL-2.0 /****************************************************************************** * * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved. * ******************************************************************************/ #include #include #include #include static const char * const _security_type_str[] = { "N/A", "WEP40", "TKIP", "TKIP_WM", "AES", "WEP104", "SMS4", "WEP_WPA", "BIP", }; const char *security_type_str(u8 value) { if (value <= _BIP_) return _security_type_str[value]; return NULL; } /* WEP related ===== */ /* Need to consider the fragment situation */ void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe) { /* exclude ICV */ union { __le32 f0; unsigned char f1[4]; } crc; signed int curfragnum, length; u32 keylength; u8 *pframe, *payload, *iv; /* wepkey */ u8 wepkey[16]; u8 hw_hdr_offset = 0; struct pkt_attrib *pattrib = &((struct xmit_frame *)pxmitframe)->attrib; struct security_priv *psecuritypriv = &padapter->securitypriv; struct xmit_priv *pxmitpriv = &padapter->xmitpriv; struct arc4_ctx *ctx = &psecuritypriv->xmit_arc4_ctx; if (!((struct xmit_frame *)pxmitframe)->buf_addr) return; hw_hdr_offset = TXDESC_OFFSET; pframe = ((struct xmit_frame *)pxmitframe)->buf_addr + hw_hdr_offset; /* start to encrypt each fragment */ if ((pattrib->encrypt == _WEP40_) || (pattrib->encrypt == _WEP104_)) { keylength = psecuritypriv->dot11DefKeylen[psecuritypriv->dot11PrivacyKeyIndex]; for (curfragnum = 0; curfragnum < pattrib->nr_frags; curfragnum++) { iv = pframe+pattrib->hdrlen; memcpy(&wepkey[0], iv, 3); memcpy(&wepkey[3], &psecuritypriv->dot11DefKey[psecuritypriv->dot11PrivacyKeyIndex].skey[0], keylength); payload = pframe+pattrib->iv_len+pattrib->hdrlen; if ((curfragnum+1) == pattrib->nr_frags) { /* the last fragment */ length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len; crc.f0 = cpu_to_le32(~crc32_le(~0, payload, length)); arc4_setkey(ctx, wepkey, 3 + keylength); arc4_crypt(ctx, payload, payload, length); arc4_crypt(ctx, payload + length, crc.f1, 4); } else { length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len; crc.f0 = cpu_to_le32(~crc32_le(~0, payload, length)); arc4_setkey(ctx, wepkey, 3 + keylength); arc4_crypt(ctx, payload, payload, length); arc4_crypt(ctx, payload + length, crc.f1, 4); pframe += pxmitpriv->frag_len; pframe = (u8 *)round_up((SIZE_PTR)(pframe), 4); } } } } void rtw_wep_decrypt(struct adapter *padapter, u8 *precvframe) { /* exclude ICV */ u8 crc[4]; signed int length; u32 keylength; u8 *pframe, *payload, *iv, wepkey[16]; u8 keyindex; struct rx_pkt_attrib *prxattrib = &(((union recv_frame *)precvframe)->u.hdr.attrib); struct security_priv *psecuritypriv = &padapter->securitypriv; struct arc4_ctx *ctx = &psecuritypriv->recv_arc4_ctx; pframe = (unsigned char *)((union recv_frame *)precvframe)->u.hdr.rx_data; /* start to decrypt recvframe */ if ((prxattrib->encrypt == _WEP40_) || (prxattrib->encrypt == _WEP104_)) { iv = pframe+prxattrib->hdrlen; /* keyindex =(iv[3]&0x3); */ keyindex = prxattrib->key_index; keylength = psecuritypriv->dot11DefKeylen[keyindex]; memcpy(&wepkey[0], iv, 3); /* memcpy(&wepkey[3], &psecuritypriv->dot11DefKey[psecuritypriv->dot11PrivacyKeyIndex].skey[0], keylength); */ memcpy(&wepkey[3], &psecuritypriv->dot11DefKey[keyindex].skey[0], keylength); length = ((union recv_frame *)precvframe)->u.hdr.len-prxattrib->hdrlen-prxattrib->iv_len; payload = pframe+prxattrib->iv_len+prxattrib->hdrlen; /* decrypt payload include icv */ arc4_setkey(ctx, wepkey, 3 + keylength); arc4_crypt(ctx, payload, payload, length); /* calculate icv and compare the icv */ *((u32 *)crc) = ~crc32_le(~0, payload, length - 4); } } /* 3 =====TKIP related ===== */ static u32 secmicgetuint32(u8 *p) /* Convert from Byte[] to Us3232 in a portable way */ { s32 i; u32 res = 0; for (i = 0; i < 4; i++) res |= ((u32)(*p++)) << (8 * i); return res; } static void secmicputuint32(u8 *p, u32 val) /* Convert from Us3232 to Byte[] in a portable way */ { long i; for (i = 0; i < 4; i++) { *p++ = (u8) (val & 0xff); val >>= 8; } } static void secmicclear(struct mic_data *pmicdata) { /* Reset the state to the empty message. */ pmicdata->L = pmicdata->K0; pmicdata->R = pmicdata->K1; pmicdata->nBytesInM = 0; pmicdata->M = 0; } void rtw_secmicsetkey(struct mic_data *pmicdata, u8 *key) { /* Set the key */ pmicdata->K0 = secmicgetuint32(key); pmicdata->K1 = secmicgetuint32(key + 4); /* and reset the message */ secmicclear(pmicdata); } void rtw_secmicappendbyte(struct mic_data *pmicdata, u8 b) { /* Append the byte to our word-sized buffer */ pmicdata->M |= ((unsigned long)b) << (8*pmicdata->nBytesInM); pmicdata->nBytesInM++; /* Process the word if it is full. */ if (pmicdata->nBytesInM >= 4) { pmicdata->L ^= pmicdata->M; pmicdata->R ^= ROL32(pmicdata->L, 17); pmicdata->L += pmicdata->R; pmicdata->R ^= ((pmicdata->L & 0xff00ff00) >> 8) | ((pmicdata->L & 0x00ff00ff) << 8); pmicdata->L += pmicdata->R; pmicdata->R ^= ROL32(pmicdata->L, 3); pmicdata->L += pmicdata->R; pmicdata->R ^= ROR32(pmicdata->L, 2); pmicdata->L += pmicdata->R; /* Clear the buffer */ pmicdata->M = 0; pmicdata->nBytesInM = 0; } } void rtw_secmicappend(struct mic_data *pmicdata, u8 *src, u32 nbytes) { /* This is simple */ while (nbytes > 0) { rtw_secmicappendbyte(pmicdata, *src++); nbytes--; } } void rtw_secgetmic(struct mic_data *pmicdata, u8 *dst) { /* Append the minimum padding */ rtw_secmicappendbyte(pmicdata, 0x5a); rtw_secmicappendbyte(pmicdata, 0); rtw_secmicappendbyte(pmicdata, 0); rtw_secmicappendbyte(pmicdata, 0); rtw_secmicappendbyte(pmicdata, 0); /* and then zeroes until the length is a multiple of 4 */ while (pmicdata->nBytesInM != 0) rtw_secmicappendbyte(pmicdata, 0); /* The appendByte function has already computed the result. */ secmicputuint32(dst, pmicdata->L); secmicputuint32(dst + 4, pmicdata->R); /* Reset to the empty message. */ secmicclear(pmicdata); } void rtw_seccalctkipmic(u8 *key, u8 *header, u8 *data, u32 data_len, u8 *mic_code, u8 pri) { struct mic_data micdata; u8 priority[4] = {0x0, 0x0, 0x0, 0x0}; rtw_secmicsetkey(&micdata, key); priority[0] = pri; /* Michael MIC pseudo header: DA, SA, 3 x 0, Priority */ if (header[1] & 1) { /* ToDS == 1 */ rtw_secmicappend(&micdata, &header[16], 6); /* DA */ if (header[1] & 2) /* From Ds == 1 */ rtw_secmicappend(&micdata, &header[24], 6); else rtw_secmicappend(&micdata, &header[10], 6); } else { /* ToDS == 0 */ rtw_secmicappend(&micdata, &header[4], 6); /* DA */ if (header[1] & 2) /* From Ds == 1 */ rtw_secmicappend(&micdata, &header[16], 6); else rtw_secmicappend(&micdata, &header[10], 6); } rtw_secmicappend(&micdata, &priority[0], 4); rtw_secmicappend(&micdata, data, data_len); rtw_secgetmic(&micdata, mic_code); } /* macros for extraction/creation of unsigned char/unsigned short values */ #define RotR1(v16) ((((v16) >> 1) & 0x7FFF) ^ (((v16) & 1) << 15)) #define Lo8(v16) ((u8)((v16) & 0x00FF)) #define Hi8(v16) ((u8)(((v16) >> 8) & 0x00FF)) #define Lo16(v32) ((u16)((v32) & 0xFFFF)) #define Hi16(v32) ((u16)(((v32) >> 16) & 0xFFFF)) #define Mk16(hi, lo) ((lo) ^ (((u16)(hi)) << 8)) /* select the Nth 16-bit word of the temporal key unsigned char array TK[] */ #define TK16(N) Mk16(tk[2*(N)+1], tk[2*(N)]) /* S-box lookup: 16 bits --> 16 bits */ #define _S_(v16) (Sbox1[0][Lo8(v16)] ^ Sbox1[1][Hi8(v16)]) /* fixed algorithm "parameters" */ #define PHASE1_LOOP_CNT 8 /* this needs to be "big enough" */ /* 2-unsigned char by 2-unsigned char subset of the full AES S-box table */ static const unsigned short Sbox1[2][256] = { /* Sbox for hash (can be in ROM) */ { 0xC6A5, 0xF884, 0xEE99, 0xF68D, 0xFF0D, 0xD6BD, 0xDEB1, 0x9154, 0x6050, 0x0203, 0xCEA9, 0x567D, 0xE719, 0xB562, 0x4DE6, 0xEC9A, 0x8F45, 0x1F9D, 0x8940, 0xFA87, 0xEF15, 0xB2EB, 0x8EC9, 0xFB0B, 0x41EC, 0xB367, 0x5FFD, 0x45EA, 0x23BF, 0x53F7, 0xE496, 0x9B5B, 0x75C2, 0xE11C, 0x3DAE, 0x4C6A, 0x6C5A, 0x7E41, 0xF502, 0x834F, 0x685C, 0x51F4, 0xD134, 0xF908, 0xE293, 0xAB73, 0x6253, 0x2A3F, 0x080C, 0x9552, 0x4665, 0x9D5E, 0x3028, 0x37A1, 0x0A0F, 0x2FB5, 0x0E09, 0x2436, 0x1B9B, 0xDF3D, 0xCD26, 0x4E69, 0x7FCD, 0xEA9F, 0x121B, 0x1D9E, 0x5874, 0x342E, 0x362D, 0xDCB2, 0xB4EE, 0x5BFB, 0xA4F6, 0x764D, 0xB761, 0x7DCE, 0x527B, 0xDD3E, 0x5E71, 0x1397, 0xA6F5, 0xB968, 0x0000, 0xC12C, 0x4060, 0xE31F, 0x79C8, 0xB6ED, 0xD4BE, 0x8D46, 0x67D9, 0x724B, 0x94DE, 0x98D4, 0xB0E8, 0x854A, 0xBB6B, 0xC52A, 0x4FE5, 0xED16, 0x86C5, 0x9AD7, 0x6655, 0x1194, 0x8ACF, 0xE910, 0x0406, 0xFE81, 0xA0F0, 0x7844, 0x25BA, 0x4BE3, 0xA2F3, 0x5DFE, 0x80C0, 0x058A, 0x3FAD, 0x21BC, 0x7048, 0xF104, 0x63DF, 0x77C1, 0xAF75, 0x4263, 0x2030, 0xE51A, 0xFD0E, 0xBF6D, 0x814C, 0x1814, 0x2635, 0xC32F, 0xBEE1, 0x35A2, 0x88CC, 0x2E39, 0x9357, 0x55F2, 0xFC82, 0x7A47, 0xC8AC, 0xBAE7, 0x322B, 0xE695, 0xC0A0, 0x1998, 0x9ED1, 0xA37F, 0x4466, 0x547E, 0x3BAB, 0x0B83, 0x8CCA, 0xC729, 0x6BD3, 0x283C, 0xA779, 0xBCE2, 0x161D, 0xAD76, 0xDB3B, 0x6456, 0x744E, 0x141E, 0x92DB, 0x0C0A, 0x486C, 0xB8E4, 0x9F5D, 0xBD6E, 0x43EF, 0xC4A6, 0x39A8, 0x31A4, 0xD337, 0xF28B, 0xD532, 0x8B43, 0x6E59, 0xDAB7, 0x018C, 0xB164, 0x9CD2, 0x49E0, 0xD8B4, 0xACFA, 0xF307, 0xCF25, 0xCAAF, 0xF48E, 0x47E9, 0x1018, 0x6FD5, 0xF088, 0x4A6F, 0x5C72, 0x3824, 0x57F1, 0x73C7, 0x9751, 0xCB23, 0xA17C, 0xE89C, 0x3E21, 0x96DD, 0x61DC, 0x0D86, 0x0F85, 0xE090, 0x7C42, 0x71C4, 0xCCAA, 0x90D8, 0x0605, 0xF701, 0x1C12, 0xC2A3, 0x6A5F, 0xAEF9, 0x69D0, 0x1791, 0x9958, 0x3A27, 0x27B9, 0xD938, 0xEB13, 0x2BB3, 0x2233, 0xD2BB, 0xA970, 0x0789, 0x33A7, 0x2DB6, 0x3C22, 0x1592, 0xC920, 0x8749, 0xAAFF, 0x5078, 0xA57A, 0x038F, 0x59F8, 0x0980, 0x1A17, 0x65DA, 0xD731, 0x84C6, 0xD0B8, 0x82C3, 0x29B0, 0x5A77, 0x1E11, 0x7BCB, 0xA8FC, 0x6DD6, 0x2C3A, }, { /* second half of table is unsigned char-reversed version of first! */ 0xA5C6, 0x84F8, 0x99EE, 0x8DF6, 0x0DFF, 0xBDD6, 0xB1DE, 0x5491, 0x5060, 0x0302, 0xA9CE, 0x7D56, 0x19E7, 0x62B5, 0xE64D, 0x9AEC, 0x458F, 0x9D1F, 0x4089, 0x87FA, 0x15EF, 0xEBB2, 0xC98E, 0x0BFB, 0xEC41, 0x67B3, 0xFD5F, 0xEA45, 0xBF23, 0xF753, 0x96E4, 0x5B9B, 0xC275, 0x1CE1, 0xAE3D, 0x6A4C, 0x5A6C, 0x417E, 0x02F5, 0x4F83, 0x5C68, 0xF451, 0x34D1, 0x08F9, 0x93E2, 0x73AB, 0x5362, 0x3F2A, 0x0C08, 0x5295, 0x6546, 0x5E9D, 0x2830, 0xA137, 0x0F0A, 0xB52F, 0x090E, 0x3624, 0x9B1B, 0x3DDF, 0x26CD, 0x694E, 0xCD7F, 0x9FEA, 0x1B12, 0x9E1D, 0x7458, 0x2E34, 0x2D36, 0xB2DC, 0xEEB4, 0xFB5B, 0xF6A4, 0x4D76, 0x61B7, 0xCE7D, 0x7B52, 0x3EDD, 0x715E, 0x9713, 0xF5A6, 0x68B9, 0x0000, 0x2CC1, 0x6040, 0x1FE3, 0xC879, 0xEDB6, 0xBED4, 0x468D, 0xD967, 0x4B72, 0xDE94, 0xD498, 0xE8B0, 0x4A85, 0x6BBB, 0x2AC5, 0xE54F, 0x16ED, 0xC586, 0xD79A, 0x5566, 0x9411, 0xCF8A, 0x10E9, 0x0604, 0x81FE, 0xF0A0, 0x4478, 0xBA25, 0xE34B, 0xF3A2, 0xFE5D, 0xC080, 0x8A05, 0xAD3F, 0xBC21, 0x4870, 0x04F1, 0xDF63, 0xC177, 0x75AF, 0x6342, 0x3020, 0x1AE5, 0x0EFD, 0x6DBF, 0x4C81, 0x1418, 0x3526, 0x2FC3, 0xE1BE, 0xA235, 0xCC88, 0x392E, 0x5793, 0xF255, 0x82FC, 0x477A, 0xACC8, 0xE7BA, 0x2B32, 0x95E6, 0xA0C0, 0x9819, 0xD19E, 0x7FA3, 0x6644, 0x7E54, 0xAB3B, 0x830B, 0xCA8C, 0x29C7, 0xD36B, 0x3C28, 0x79A7, 0xE2BC, 0x1D16, 0x76AD, 0x3BDB, 0x5664, 0x4E74, 0x1E14, 0xDB92, 0x0A0C, 0x6C48, 0xE4B8, 0x5D9F, 0x6EBD, 0xEF43, 0xA6C4, 0xA839, 0xA431, 0x37D3, 0x8BF2, 0x32D5, 0x438B, 0x596E, 0xB7DA, 0x8C01, 0x64B1, 0xD29C, 0xE049, 0xB4D8, 0xFAAC, 0x07F3, 0x25CF, 0xAFCA, 0x8EF4, 0xE947, 0x1810, 0xD56F, 0x88F0, 0x6F4A, 0x725C, 0x2438, 0xF157, 0xC773, 0x5197, 0x23CB, 0x7CA1, 0x9CE8, 0x213E, 0xDD96, 0xDC61, 0x860D, 0x850F, 0x90E0, 0x427C, 0xC471, 0xAACC, 0xD890, 0x0506, 0x01F7, 0x121C, 0xA3C2, 0x5F6A, 0xF9AE, 0xD069, 0x9117, 0x5899, 0x273A, 0xB927, 0x38D9, 0x13EB, 0xB32B, 0x3322, 0xBBD2, 0x70A9, 0x8907, 0xA733, 0xB62D, 0x223C, 0x9215, 0x20C9, 0x4987, 0xFFAA, 0x7850, 0x7AA5, 0x8F03, 0xF859, 0x8009, 0x171A, 0xDA65, 0x31D7, 0xC684, 0xB8D0, 0xC382, 0xB029, 0x775A, 0x111E, 0xCB7B, 0xFCA8, 0xD66D, 0x3A2C, } }; /* ********************************************************************** * Routine: Phase 1 -- generate P1K, given TA, TK, IV32 * * Inputs: * tk[] = temporal key [128 bits] * ta[] = transmitter's MAC address [ 48 bits] * iv32 = upper 32 bits of IV [ 32 bits] * Output: * p1k[] = Phase 1 key [ 80 bits] * * Note: * This function only needs to be called every 2**16 packets, * although in theory it could be called every packet. * ********************************************************************** */ static void phase1(u16 *p1k, const u8 *tk, const u8 *ta, u32 iv32) { signed int i; /* Initialize the 80 bits of P1K[] from IV32 and TA[0..5] */ p1k[0] = Lo16(iv32); p1k[1] = Hi16(iv32); p1k[2] = Mk16(ta[1], ta[0]); /* use TA[] as little-endian */ p1k[3] = Mk16(ta[3], ta[2]); p1k[4] = Mk16(ta[5], ta[4]); /* Now compute an unbalanced Feistel cipher with 80-bit block */ /* size on the 80-bit block P1K[], using the 128-bit key TK[] */ for (i = 0; i < PHASE1_LOOP_CNT; i++) { /* Each add operation here is mod 2**16 */ p1k[0] += _S_(p1k[4] ^ TK16((i&1)+0)); p1k[1] += _S_(p1k[0] ^ TK16((i&1)+2)); p1k[2] += _S_(p1k[1] ^ TK16((i&1)+4)); p1k[3] += _S_(p1k[2] ^ TK16((i&1)+6)); p1k[4] += _S_(p1k[3] ^ TK16((i&1)+0)); p1k[4] += (unsigned short)i; /* avoid "slide attacks" */ } } /* ********************************************************************** * Routine: Phase 2 -- generate RC4KEY, given TK, P1K, IV16 * * Inputs: * tk[] = Temporal key [128 bits] * p1k[] = Phase 1 output key [ 80 bits] * iv16 = low 16 bits of IV counter [ 16 bits] * Output: * rc4key[] = the key used to encrypt the packet [128 bits] * * Note: * The value {TA, IV32, IV16} for Phase1/Phase2 must be unique * across all packets using the same key TK value. Then, for a * given value of TK[], this TKIP48 construction guarantees that * the final RC4KEY value is unique across all packets. * * Suggested implementation optimization: if PPK[] is "overlaid" * appropriately on RC4KEY[], there is no need for the final * for loop below that copies the PPK[] result into RC4KEY[]. * ********************************************************************** */ static void phase2(u8 *rc4key, const u8 *tk, const u16 *p1k, u16 iv16) { signed int i; u16 PPK[6]; /* temporary key for mixing */ /* Note: all adds in the PPK[] equations below are mod 2**16 */ for (i = 0; i < 5; i++) PPK[i] = p1k[i]; /* first, copy P1K to PPK */ PPK[5] = p1k[4]+iv16; /* next, add in IV16 */ /* Bijective non-linear mixing of the 96 bits of PPK[0..5] */ PPK[0] += _S_(PPK[5] ^ TK16(0)); /* Mix key in each "round" */ PPK[1] += _S_(PPK[0] ^ TK16(1)); PPK[2] += _S_(PPK[1] ^ TK16(2)); PPK[3] += _S_(PPK[2] ^ TK16(3)); PPK[4] += _S_(PPK[3] ^ TK16(4)); PPK[5] += _S_(PPK[4] ^ TK16(5)); /* Total # S-box lookups == 6 */ /* Final sweep: bijective, "linear". Rotates kill LSB correlations */ PPK[0] += RotR1(PPK[5] ^ TK16(6)); PPK[1] += RotR1(PPK[0] ^ TK16(7)); /* Use all of TK[] in Phase2 */ PPK[2] += RotR1(PPK[1]); PPK[3] += RotR1(PPK[2]); PPK[4] += RotR1(PPK[3]); PPK[5] += RotR1(PPK[4]); /* Note: At this point, for a given key TK[0..15], the 96-bit output */ /* value PPK[0..5] is guaranteed to be unique, as a function */ /* of the 96-bit "input" value {TA, IV32, IV16}. That is, P1K */ /* is now a keyed permutation of {TA, IV32, IV16}. */ /* Set RC4KEY[0..3], which includes "cleartext" portion of RC4 key */ rc4key[0] = Hi8(iv16); /* RC4KEY[0..2] is the WEP IV */ rc4key[1] = (Hi8(iv16) | 0x20) & 0x7F; /* Help avoid weak (FMS) keys */ rc4key[2] = Lo8(iv16); rc4key[3] = Lo8((PPK[5] ^ TK16(0)) >> 1); /* Copy 96 bits of PPK[0..5] to RC4KEY[4..15] (little-endian) */ for (i = 0; i < 6; i++) { rc4key[4+2*i] = Lo8(PPK[i]); rc4key[5+2*i] = Hi8(PPK[i]); } } /* The hlen isn't include the IV */ u32 rtw_tkip_encrypt(struct adapter *padapter, u8 *pxmitframe) { /* exclude ICV */ u16 pnl; u32 pnh; u8 rc4key[16]; u8 ttkey[16]; union { __le32 f0; u8 f1[4]; } crc; u8 hw_hdr_offset = 0; signed int curfragnum, length; u8 *pframe, *payload, *iv, *prwskey; union pn48 dot11txpn; struct pkt_attrib *pattrib = &((struct xmit_frame *)pxmitframe)->attrib; struct security_priv *psecuritypriv = &padapter->securitypriv; struct xmit_priv *pxmitpriv = &padapter->xmitpriv; struct arc4_ctx *ctx = &psecuritypriv->xmit_arc4_ctx; u32 res = _SUCCESS; if (!((struct xmit_frame *)pxmitframe)->buf_addr) return _FAIL; hw_hdr_offset = TXDESC_OFFSET; pframe = ((struct xmit_frame *)pxmitframe)->buf_addr + hw_hdr_offset; /* 4 start to encrypt each fragment */ if (pattrib->encrypt == _TKIP_) { { if (IS_MCAST(pattrib->ra)) prwskey = psecuritypriv->dot118021XGrpKey[psecuritypriv->dot118021XGrpKeyid].skey; else prwskey = pattrib->dot118021x_UncstKey.skey; for (curfragnum = 0; curfragnum < pattrib->nr_frags; curfragnum++) { iv = pframe+pattrib->hdrlen; payload = pframe+pattrib->iv_len+pattrib->hdrlen; GET_TKIP_PN(iv, dot11txpn); pnl = (u16)(dot11txpn.val); pnh = (u32)(dot11txpn.val>>16); phase1((u16 *)&ttkey[0], prwskey, &pattrib->ta[0], pnh); phase2(&rc4key[0], prwskey, (u16 *)&ttkey[0], pnl); if ((curfragnum+1) == pattrib->nr_frags) { /* 4 the last fragment */ length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len; crc.f0 = cpu_to_le32(~crc32_le(~0, payload, length)); arc4_setkey(ctx, rc4key, 16); arc4_crypt(ctx, payload, payload, length); arc4_crypt(ctx, payload + length, crc.f1, 4); } else { length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len; crc.f0 = cpu_to_le32(~crc32_le(~0, payload, length)); arc4_setkey(ctx, rc4key, 16); arc4_crypt(ctx, payload, payload, length); arc4_crypt(ctx, payload + length, crc.f1, 4); pframe += pxmitpriv->frag_len; pframe = (u8 *)round_up((SIZE_PTR)(pframe), 4); } } } } return res; } /* The hlen isn't include the IV */ u32 rtw_tkip_decrypt(struct adapter *padapter, u8 *precvframe) { /* exclude ICV */ u16 pnl; u32 pnh; u8 rc4key[16]; u8 ttkey[16]; u8 crc[4]; signed int length; u8 *pframe, *payload, *iv, *prwskey; union pn48 dot11txpn; struct sta_info *stainfo; struct rx_pkt_attrib *prxattrib = &((union recv_frame *)precvframe)->u.hdr.attrib; struct security_priv *psecuritypriv = &padapter->securitypriv; struct arc4_ctx *ctx = &psecuritypriv->recv_arc4_ctx; u32 res = _SUCCESS; pframe = (unsigned char *)((union recv_frame *)precvframe)->u.hdr.rx_data; /* 4 start to decrypt recvframe */ if (prxattrib->encrypt == _TKIP_) { stainfo = rtw_get_stainfo(&padapter->stapriv, &prxattrib->ta[0]); if (stainfo) { if (IS_MCAST(prxattrib->ra)) { static unsigned long start; static u32 no_gkey_bc_cnt; static u32 no_gkey_mc_cnt; if (!psecuritypriv->binstallGrpkey) { res = _FAIL; if (start == 0) start = jiffies; if (is_broadcast_mac_addr(prxattrib->ra)) no_gkey_bc_cnt++; else no_gkey_mc_cnt++; if (jiffies_to_msecs(jiffies - start) > 1000) { if (no_gkey_bc_cnt || no_gkey_mc_cnt) { netdev_dbg(padapter->pnetdev, FUNC_ADPT_FMT " no_gkey_bc_cnt:%u, no_gkey_mc_cnt:%u\n", FUNC_ADPT_ARG(padapter), no_gkey_bc_cnt, no_gkey_mc_cnt); } start = jiffies; no_gkey_bc_cnt = 0; no_gkey_mc_cnt = 0; } goto exit; } if (no_gkey_bc_cnt || no_gkey_mc_cnt) { netdev_dbg(padapter->pnetdev, FUNC_ADPT_FMT " gkey installed. no_gkey_bc_cnt:%u, no_gkey_mc_cnt:%u\n", FUNC_ADPT_ARG(padapter), no_gkey_bc_cnt, no_gkey_mc_cnt); } start = 0; no_gkey_bc_cnt = 0; no_gkey_mc_cnt = 0; prwskey = psecuritypriv->dot118021XGrpKey[prxattrib->key_index].skey; } else { prwskey = &stainfo->dot118021x_UncstKey.skey[0]; } iv = pframe+prxattrib->hdrlen; payload = pframe+prxattrib->iv_len+prxattrib->hdrlen; length = ((union recv_frame *)precvframe)->u.hdr.len-prxattrib->hdrlen-prxattrib->iv_len; GET_TKIP_PN(iv, dot11txpn); pnl = (u16)(dot11txpn.val); pnh = (u32)(dot11txpn.val>>16); phase1((u16 *)&ttkey[0], prwskey, &prxattrib->ta[0], pnh); phase2(&rc4key[0], prwskey, (unsigned short *)&ttkey[0], pnl); /* 4 decrypt payload include icv */ arc4_setkey(ctx, rc4key, 16); arc4_crypt(ctx, payload, payload, length); *((u32 *)crc) = ~crc32_le(~0, payload, length - 4); if (crc[3] != payload[length - 1] || crc[2] != payload[length - 2] || crc[1] != payload[length - 3] || crc[0] != payload[length - 4]) res = _FAIL; } else { res = _FAIL; } } exit: return res; } /* 3 =====AES related ===== */ #define MAX_MSG_SIZE 2048 /*****************************/ /**** Function Prototypes ****/ /*****************************/ static void bitwise_xor(u8 *ina, u8 *inb, u8 *out); static void construct_mic_iv(u8 *mic_header1, signed int qc_exists, signed int a4_exists, u8 *mpdu, uint payload_length, u8 *pn_vector, uint frtype); /* add for CONFIG_IEEE80211W, none 11w also can use */ static void construct_mic_header1(u8 *mic_header1, signed int header_length, u8 *mpdu, uint frtype); /* for CONFIG_IEEE80211W, none 11w also can use */ static void construct_mic_header2(u8 *mic_header2, u8 *mpdu, signed int a4_exists, signed int qc_exists); static void construct_ctr_preload(u8 *ctr_preload, signed int a4_exists, signed int qc_exists, u8 *mpdu, u8 *pn_vector, signed int c, uint frtype); /* for CONFIG_IEEE80211W, none 11w also can use */ static void aes128k128d(u8 *key, u8 *data, u8 *ciphertext); /****************************************/ /* aes128k128d() */ /* Performs a 128 bit AES encrypt with */ /* 128 bit data. */ /****************************************/ static void aes128k128d(u8 *key, u8 *data, u8 *ciphertext) { struct crypto_aes_ctx ctx; aes_expandkey(&ctx, key, 16); aes_encrypt(&ctx, ciphertext, data); memzero_explicit(&ctx, sizeof(ctx)); } /************************************************/ /* construct_mic_iv() */ /* Builds the MIC IV from header fields and PN */ /* Baron think the function is construct CCM */ /* nonce */ /************************************************/ static void construct_mic_iv(u8 *mic_iv, signed int qc_exists, signed int a4_exists, u8 *mpdu, uint payload_length, u8 *pn_vector, uint frtype) /* add for CONFIG_IEEE80211W, none 11w also can use */ { signed int i; mic_iv[0] = 0x59; if (qc_exists && a4_exists) mic_iv[1] = mpdu[30] & 0x0f; /* QoS_TC */ if (qc_exists && !a4_exists) mic_iv[1] = mpdu[24] & 0x0f; /* mute bits 7-4 */ if (!qc_exists) mic_iv[1] = 0x00; /* 802.11w management frame should set management bit(4) */ if (frtype == WIFI_MGT_TYPE) mic_iv[1] |= BIT(4); for (i = 2; i < 8; i++) mic_iv[i] = mpdu[i + 8]; /* mic_iv[2:7] = A2[0:5] = mpdu[10:15] */ #ifdef CONSISTENT_PN_ORDER for (i = 8; i < 14; i++) mic_iv[i] = pn_vector[i - 8]; /* mic_iv[8:13] = PN[0:5] */ #else for (i = 8; i < 14; i++) mic_iv[i] = pn_vector[13 - i]; /* mic_iv[8:13] = PN[5:0] */ #endif mic_iv[14] = (unsigned char) (payload_length / 256); mic_iv[15] = (unsigned char) (payload_length % 256); } /************************************************/ /* construct_mic_header1() */ /* Builds the first MIC header block from */ /* header fields. */ /* Build AAD SC, A1, A2 */ /************************************************/ static void construct_mic_header1(u8 *mic_header1, signed int header_length, u8 *mpdu, uint frtype) /* for CONFIG_IEEE80211W, none 11w also can use */ { mic_header1[0] = (u8)((header_length - 2) / 256); mic_header1[1] = (u8)((header_length - 2) % 256); /* 802.11w management frame don't AND subtype bits 4, 5, 6 of frame control field */ if (frtype == WIFI_MGT_TYPE) mic_header1[2] = mpdu[0]; else mic_header1[2] = mpdu[0] & 0xcf; /* Mute CF poll & CF ack bits */ mic_header1[3] = mpdu[1] & 0xc7; /* Mute retry, more data and pwr mgt bits */ mic_header1[4] = mpdu[4]; /* A1 */ mic_header1[5] = mpdu[5]; mic_header1[6] = mpdu[6]; mic_header1[7] = mpdu[7]; mic_header1[8] = mpdu[8]; mic_header1[9] = mpdu[9]; mic_header1[10] = mpdu[10]; /* A2 */ mic_header1[11] = mpdu[11]; mic_header1[12] = mpdu[12]; mic_header1[13] = mpdu[13]; mic_header1[14] = mpdu[14]; mic_header1[15] = mpdu[15]; } /************************************************/ /* construct_mic_header2() */ /* Builds the last MIC header block from */ /* header fields. */ /************************************************/ static void construct_mic_header2(u8 *mic_header2, u8 *mpdu, signed int a4_exists, signed int qc_exists) { signed int i; for (i = 0; i < 16; i++) mic_header2[i] = 0x00; mic_header2[0] = mpdu[16]; /* A3 */ mic_header2[1] = mpdu[17]; mic_header2[2] = mpdu[18]; mic_header2[3] = mpdu[19]; mic_header2[4] = mpdu[20]; mic_header2[5] = mpdu[21]; mic_header2[6] = 0x00; mic_header2[7] = 0x00; /* mpdu[23]; */ if (!qc_exists && a4_exists) { for (i = 0; i < 6; i++) mic_header2[8+i] = mpdu[24+i]; /* A4 */ } if (qc_exists && !a4_exists) { mic_header2[8] = mpdu[24] & 0x0f; /* mute bits 15 - 4 */ mic_header2[9] = mpdu[25] & 0x00; } if (qc_exists && a4_exists) { for (i = 0; i < 6; i++) mic_header2[8+i] = mpdu[24+i]; /* A4 */ mic_header2[14] = mpdu[30] & 0x0f; mic_header2[15] = mpdu[31] & 0x00; } } /************************************************/ /* construct_mic_header2() */ /* Builds the last MIC header block from */ /* header fields. */ /* Baron think the function is construct CCM */ /* nonce */ /************************************************/ static void construct_ctr_preload(u8 *ctr_preload, signed int a4_exists, signed int qc_exists, u8 *mpdu, u8 *pn_vector, signed int c, uint frtype) /* for CONFIG_IEEE80211W, none 11w also can use */ { signed int i = 0; for (i = 0; i < 16; i++) ctr_preload[i] = 0x00; i = 0; ctr_preload[0] = 0x01; /* flag */ if (qc_exists && a4_exists) ctr_preload[1] = mpdu[30] & 0x0f; /* QoC_Control */ if (qc_exists && !a4_exists) ctr_preload[1] = mpdu[24] & 0x0f; /* 802.11w management frame should set management bit(4) */ if (frtype == WIFI_MGT_TYPE) ctr_preload[1] |= BIT(4); for (i = 2; i < 8; i++) ctr_preload[i] = mpdu[i + 8]; /* ctr_preload[2:7] = A2[0:5] = mpdu[10:15] */ #ifdef CONSISTENT_PN_ORDER for (i = 8; i < 14; i++) ctr_preload[i] = pn_vector[i - 8]; /* ctr_preload[8:13] = PN[0:5] */ #else for (i = 8; i < 14; i++) ctr_preload[i] = pn_vector[13 - i]; /* ctr_preload[8:13] = PN[5:0] */ #endif ctr_preload[14] = (unsigned char) (c / 256); /* Ctr */ ctr_preload[15] = (unsigned char) (c % 256); } /************************************/ /* bitwise_xor() */ /* A 128 bit, bitwise exclusive or */ /************************************/ static void bitwise_xor(u8 *ina, u8 *inb, u8 *out) { signed int i; for (i = 0; i < 16; i++) out[i] = ina[i] ^ inb[i]; } static signed int aes_cipher(u8 *key, uint hdrlen, u8 *pframe, uint plen) { uint qc_exists, a4_exists, i, j, payload_remainder, num_blocks, payload_index; u8 pn_vector[6]; u8 mic_iv[16]; u8 mic_header1[16]; u8 mic_header2[16]; u8 ctr_preload[16]; /* Intermediate Buffers */ u8 chain_buffer[16]; u8 aes_out[16]; u8 padded_buffer[16]; u8 mic[8]; uint frtype = GetFrameType(pframe); uint frsubtype = GetFrameSubType(pframe); frsubtype = frsubtype>>4; memset((void *)mic_iv, 0, 16); memset((void *)mic_header1, 0, 16); memset((void *)mic_header2, 0, 16); memset((void *)ctr_preload, 0, 16); memset((void *)chain_buffer, 0, 16); memset((void *)aes_out, 0, 16); memset((void *)padded_buffer, 0, 16); if ((hdrlen == WLAN_HDR_A3_LEN) || (hdrlen == WLAN_HDR_A3_QOS_LEN)) a4_exists = 0; else a4_exists = 1; if (((frtype|frsubtype) == WIFI_DATA_CFACK) || ((frtype|frsubtype) == WIFI_DATA_CFPOLL) || ((frtype|frsubtype) == WIFI_DATA_CFACKPOLL)) { qc_exists = 1; if (hdrlen != WLAN_HDR_A3_QOS_LEN) hdrlen += 2; } else if ((frtype == WIFI_DATA) && /* add for CONFIG_IEEE80211W, none 11w also can use */ ((frsubtype == 0x08) || (frsubtype == 0x09) || (frsubtype == 0x0a) || (frsubtype == 0x0b))) { if (hdrlen != WLAN_HDR_A3_QOS_LEN) hdrlen += 2; qc_exists = 1; } else { qc_exists = 0; } pn_vector[0] = pframe[hdrlen]; pn_vector[1] = pframe[hdrlen+1]; pn_vector[2] = pframe[hdrlen+4]; pn_vector[3] = pframe[hdrlen+5]; pn_vector[4] = pframe[hdrlen+6]; pn_vector[5] = pframe[hdrlen+7]; construct_mic_iv(mic_iv, qc_exists, a4_exists, pframe, /* message, */ plen, pn_vector, frtype); /* add for CONFIG_IEEE80211W, none 11w also can use */ construct_mic_header1(mic_header1, hdrlen, pframe, /* message */ frtype); /* add for CONFIG_IEEE80211W, none 11w also can use */ construct_mic_header2(mic_header2, pframe, /* message, */ a4_exists, qc_exists); payload_remainder = plen % 16; num_blocks = plen / 16; /* Find start of payload */ payload_index = (hdrlen + 8); /* Calculate MIC */ aes128k128d(key, mic_iv, aes_out); bitwise_xor(aes_out, mic_header1, chain_buffer); aes128k128d(key, chain_buffer, aes_out); bitwise_xor(aes_out, mic_header2, chain_buffer); aes128k128d(key, chain_buffer, aes_out); for (i = 0; i < num_blocks; i++) { bitwise_xor(aes_out, &pframe[payload_index], chain_buffer); payload_index += 16; aes128k128d(key, chain_buffer, aes_out); } /* Add on the final payload block if it needs padding */ if (payload_remainder > 0) { for (j = 0; j < 16; j++) padded_buffer[j] = 0x00; for (j = 0; j < payload_remainder; j++) padded_buffer[j] = pframe[payload_index++]; bitwise_xor(aes_out, padded_buffer, chain_buffer); aes128k128d(key, chain_buffer, aes_out); } for (j = 0 ; j < 8; j++) mic[j] = aes_out[j]; /* Insert MIC into payload */ for (j = 0; j < 8; j++) pframe[payload_index+j] = mic[j]; payload_index = hdrlen + 8; for (i = 0; i < num_blocks; i++) { construct_ctr_preload(ctr_preload, a4_exists, qc_exists, pframe, /* message, */ pn_vector, i+1, frtype); /* add for CONFIG_IEEE80211W, none 11w also can use */ aes128k128d(key, ctr_preload, aes_out); bitwise_xor(aes_out, &pframe[payload_index], chain_buffer); for (j = 0; j < 16; j++) pframe[payload_index++] = chain_buffer[j]; } if (payload_remainder > 0) { /* If there is a short final block, then pad it,*/ /* encrypt it and copy the unpadded part back */ construct_ctr_preload(ctr_preload, a4_exists, qc_exists, pframe, /* message, */ pn_vector, num_blocks+1, frtype); /* add for CONFIG_IEEE80211W, none 11w also can use */ for (j = 0; j < 16; j++) padded_buffer[j] = 0x00; for (j = 0; j < payload_remainder; j++) padded_buffer[j] = pframe[payload_index+j]; aes128k128d(key, ctr_preload, aes_out); bitwise_xor(aes_out, padded_buffer, chain_buffer); for (j = 0; j < payload_remainder; j++) pframe[payload_index++] = chain_buffer[j]; } /* Encrypt the MIC */ construct_ctr_preload(ctr_preload, a4_exists, qc_exists, pframe, /* message, */ pn_vector, 0, frtype); /* add for CONFIG_IEEE80211W, none 11w also can use */ for (j = 0; j < 16; j++) padded_buffer[j] = 0x00; for (j = 0; j < 8; j++) padded_buffer[j] = pframe[j+hdrlen+8+plen]; aes128k128d(key, ctr_preload, aes_out); bitwise_xor(aes_out, padded_buffer, chain_buffer); for (j = 0; j < 8; j++) pframe[payload_index++] = chain_buffer[j]; return _SUCCESS; } u32 rtw_aes_encrypt(struct adapter *padapter, u8 *pxmitframe) { /* exclude ICV */ /*static*/ /* unsigned char message[MAX_MSG_SIZE]; */ /* Intermediate Buffers */ signed int curfragnum, length; u8 *pframe, *prwskey; /* *payload,*iv */ u8 hw_hdr_offset = 0; struct pkt_attrib *pattrib = &((struct xmit_frame *)pxmitframe)->attrib; struct security_priv *psecuritypriv = &padapter->securitypriv; struct xmit_priv *pxmitpriv = &padapter->xmitpriv; u32 res = _SUCCESS; if (!((struct xmit_frame *)pxmitframe)->buf_addr) return _FAIL; hw_hdr_offset = TXDESC_OFFSET; pframe = ((struct xmit_frame *)pxmitframe)->buf_addr + hw_hdr_offset; /* 4 start to encrypt each fragment */ if (pattrib->encrypt == _AES_) { if (IS_MCAST(pattrib->ra)) prwskey = psecuritypriv->dot118021XGrpKey[psecuritypriv->dot118021XGrpKeyid].skey; else prwskey = pattrib->dot118021x_UncstKey.skey; for (curfragnum = 0; curfragnum < pattrib->nr_frags; curfragnum++) { if ((curfragnum+1) == pattrib->nr_frags) { /* 4 the last fragment */ length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len; aes_cipher(prwskey, pattrib->hdrlen, pframe, length); } else { length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len; aes_cipher(prwskey, pattrib->hdrlen, pframe, length); pframe += pxmitpriv->frag_len; pframe = (u8 *)round_up((SIZE_PTR)(pframe), 4); } } } return res; } static signed int aes_decipher(u8 *key, uint hdrlen, u8 *pframe, uint plen) { static u8 message[MAX_MSG_SIZE]; uint qc_exists, a4_exists, i, j, payload_remainder, num_blocks, payload_index; signed int res = _SUCCESS; u8 pn_vector[6]; u8 mic_iv[16]; u8 mic_header1[16]; u8 mic_header2[16]; u8 ctr_preload[16]; /* Intermediate Buffers */ u8 chain_buffer[16]; u8 aes_out[16]; u8 padded_buffer[16]; u8 mic[8]; uint frtype = GetFrameType(pframe); uint frsubtype = GetFrameSubType(pframe); frsubtype = frsubtype>>4; memset((void *)mic_iv, 0, 16); memset((void *)mic_header1, 0, 16); memset((void *)mic_header2, 0, 16); memset((void *)ctr_preload, 0, 16); memset((void *)chain_buffer, 0, 16); memset((void *)aes_out, 0, 16); memset((void *)padded_buffer, 0, 16); /* start to decrypt the payload */ num_blocks = (plen-8) / 16; /* plen including LLC, payload_length and mic) */ payload_remainder = (plen-8) % 16; pn_vector[0] = pframe[hdrlen]; pn_vector[1] = pframe[hdrlen + 1]; pn_vector[2] = pframe[hdrlen + 4]; pn_vector[3] = pframe[hdrlen + 5]; pn_vector[4] = pframe[hdrlen + 6]; pn_vector[5] = pframe[hdrlen + 7]; if ((hdrlen == WLAN_HDR_A3_LEN) || (hdrlen == WLAN_HDR_A3_QOS_LEN)) a4_exists = 0; else a4_exists = 1; if (((frtype|frsubtype) == WIFI_DATA_CFACK) || ((frtype|frsubtype) == WIFI_DATA_CFPOLL) || ((frtype|frsubtype) == WIFI_DATA_CFACKPOLL)) { qc_exists = 1; if (hdrlen != WLAN_HDR_A3_QOS_LEN) hdrlen += 2; } else if ((frtype == WIFI_DATA) && /* only for data packet . add for CONFIG_IEEE80211W, none 11w also can use */ ((frsubtype == 0x08) || (frsubtype == 0x09) || (frsubtype == 0x0a) || (frsubtype == 0x0b))) { if (hdrlen != WLAN_HDR_A3_QOS_LEN) hdrlen += 2; qc_exists = 1; } else { qc_exists = 0; } /* now, decrypt pframe with hdrlen offset and plen long */ payload_index = hdrlen + 8; /* 8 is for extiv */ for (i = 0; i < num_blocks; i++) { construct_ctr_preload(ctr_preload, a4_exists, qc_exists, pframe, pn_vector, i + 1, frtype); /* add for CONFIG_IEEE80211W, none 11w also can use */ aes128k128d(key, ctr_preload, aes_out); bitwise_xor(aes_out, &pframe[payload_index], chain_buffer); for (j = 0; j < 16; j++) pframe[payload_index++] = chain_buffer[j]; } if (payload_remainder > 0) { /* If there is a short final block, then pad it,*/ /* encrypt it and copy the unpadded part back */ construct_ctr_preload(ctr_preload, a4_exists, qc_exists, pframe, pn_vector, num_blocks+1, frtype); /* add for CONFIG_IEEE80211W, none 11w also can use */ for (j = 0; j < 16; j++) padded_buffer[j] = 0x00; for (j = 0; j < payload_remainder; j++) padded_buffer[j] = pframe[payload_index+j]; aes128k128d(key, ctr_preload, aes_out); bitwise_xor(aes_out, padded_buffer, chain_buffer); for (j = 0; j < payload_remainder; j++) pframe[payload_index++] = chain_buffer[j]; } /* start to calculate the mic */ if ((hdrlen + plen+8) <= MAX_MSG_SIZE) memcpy((void *)message, pframe, (hdrlen + plen+8)); /* 8 is for ext iv len */ pn_vector[0] = pframe[hdrlen]; pn_vector[1] = pframe[hdrlen+1]; pn_vector[2] = pframe[hdrlen+4]; pn_vector[3] = pframe[hdrlen+5]; pn_vector[4] = pframe[hdrlen+6]; pn_vector[5] = pframe[hdrlen+7]; construct_mic_iv(mic_iv, qc_exists, a4_exists, message, plen-8, pn_vector, frtype); /* add for CONFIG_IEEE80211W, none 11w also can use */ construct_mic_header1(mic_header1, hdrlen, message, frtype); /* add for CONFIG_IEEE80211W, none 11w also can use */ construct_mic_header2(mic_header2, message, a4_exists, qc_exists); payload_remainder = (plen-8) % 16; num_blocks = (plen-8) / 16; /* Find start of payload */ payload_index = (hdrlen + 8); /* Calculate MIC */ aes128k128d(key, mic_iv, aes_out); bitwise_xor(aes_out, mic_header1, chain_buffer); aes128k128d(key, chain_buffer, aes_out); bitwise_xor(aes_out, mic_header2, chain_buffer); aes128k128d(key, chain_buffer, aes_out); for (i = 0; i < num_blocks; i++) { bitwise_xor(aes_out, &message[payload_index], chain_buffer); payload_index += 16; aes128k128d(key, chain_buffer, aes_out); } /* Add on the final payload block if it needs padding */ if (payload_remainder > 0) { for (j = 0; j < 16; j++) padded_buffer[j] = 0x00; for (j = 0; j < payload_remainder; j++) padded_buffer[j] = message[payload_index++]; bitwise_xor(aes_out, padded_buffer, chain_buffer); aes128k128d(key, chain_buffer, aes_out); } for (j = 0; j < 8; j++) mic[j] = aes_out[j]; /* Insert MIC into payload */ for (j = 0; j < 8; j++) message[payload_index+j] = mic[j]; payload_index = hdrlen + 8; for (i = 0; i < num_blocks; i++) { construct_ctr_preload(ctr_preload, a4_exists, qc_exists, message, pn_vector, i+1, frtype); /* add for CONFIG_IEEE80211W, none 11w also can use */ aes128k128d(key, ctr_preload, aes_out); bitwise_xor(aes_out, &message[payload_index], chain_buffer); for (j = 0; j < 16; j++) message[payload_index++] = chain_buffer[j]; } if (payload_remainder > 0) { /* If there is a short final block, then pad it,*/ /* encrypt it and copy the unpadded part back */ construct_ctr_preload(ctr_preload, a4_exists, qc_exists, message, pn_vector, num_blocks+1, frtype); /* add for CONFIG_IEEE80211W, none 11w also can use */ for (j = 0; j < 16; j++) padded_buffer[j] = 0x00; for (j = 0; j < payload_remainder; j++) padded_buffer[j] = message[payload_index+j]; aes128k128d(key, ctr_preload, aes_out); bitwise_xor(aes_out, padded_buffer, chain_buffer); for (j = 0; j < payload_remainder; j++) message[payload_index++] = chain_buffer[j]; } /* Encrypt the MIC */ construct_ctr_preload(ctr_preload, a4_exists, qc_exists, message, pn_vector, 0, frtype); /* add for CONFIG_IEEE80211W, none 11w also can use */ for (j = 0; j < 16; j++) padded_buffer[j] = 0x00; for (j = 0; j < 8; j++) padded_buffer[j] = message[j+hdrlen+8+plen-8]; aes128k128d(key, ctr_preload, aes_out); bitwise_xor(aes_out, padded_buffer, chain_buffer); for (j = 0; j < 8; j++) message[payload_index++] = chain_buffer[j]; /* compare the mic */ for (i = 0; i < 8; i++) { if (pframe[hdrlen + 8 + plen - 8 + i] != message[hdrlen + 8 + plen - 8 + i]) res = _FAIL; } return res; } u32 rtw_aes_decrypt(struct adapter *padapter, u8 *precvframe) { /* exclude ICV */ /*static*/ /* unsigned char message[MAX_MSG_SIZE]; */ /* Intermediate Buffers */ signed int length; u8 *pframe, *prwskey; /* *payload,*iv */ struct sta_info *stainfo; struct rx_pkt_attrib *prxattrib = &((union recv_frame *)precvframe)->u.hdr.attrib; struct security_priv *psecuritypriv = &padapter->securitypriv; u32 res = _SUCCESS; pframe = (unsigned char *)((union recv_frame *)precvframe)->u.hdr.rx_data; /* 4 start to encrypt each fragment */ if (prxattrib->encrypt == _AES_) { stainfo = rtw_get_stainfo(&padapter->stapriv, &prxattrib->ta[0]); if (stainfo) { if (IS_MCAST(prxattrib->ra)) { static unsigned long start; static u32 no_gkey_bc_cnt; static u32 no_gkey_mc_cnt; if (!psecuritypriv->binstallGrpkey) { res = _FAIL; if (start == 0) start = jiffies; if (is_broadcast_mac_addr(prxattrib->ra)) no_gkey_bc_cnt++; else no_gkey_mc_cnt++; if (jiffies_to_msecs(jiffies - start) > 1000) { if (no_gkey_bc_cnt || no_gkey_mc_cnt) { netdev_dbg(padapter->pnetdev, FUNC_ADPT_FMT " no_gkey_bc_cnt:%u, no_gkey_mc_cnt:%u\n", FUNC_ADPT_ARG(padapter), no_gkey_bc_cnt, no_gkey_mc_cnt); } start = jiffies; no_gkey_bc_cnt = 0; no_gkey_mc_cnt = 0; } goto exit; } if (no_gkey_bc_cnt || no_gkey_mc_cnt) { netdev_dbg(padapter->pnetdev, FUNC_ADPT_FMT " gkey installed. no_gkey_bc_cnt:%u, no_gkey_mc_cnt:%u\n", FUNC_ADPT_ARG(padapter), no_gkey_bc_cnt, no_gkey_mc_cnt); } start = 0; no_gkey_bc_cnt = 0; no_gkey_mc_cnt = 0; prwskey = psecuritypriv->dot118021XGrpKey[prxattrib->key_index].skey; if (psecuritypriv->dot118021XGrpKeyid != prxattrib->key_index) { res = _FAIL; goto exit; } } else { prwskey = &stainfo->dot118021x_UncstKey.skey[0]; } length = ((union recv_frame *)precvframe)->u.hdr.len-prxattrib->hdrlen-prxattrib->iv_len; res = aes_decipher(prwskey, prxattrib->hdrlen, pframe, length); } else { res = _FAIL; } } exit: return res; } u32 rtw_BIP_verify(struct adapter *padapter, u8 *precvframe) { struct rx_pkt_attrib *pattrib = &((union recv_frame *)precvframe)->u.hdr.attrib; u8 *pframe; u8 *BIP_AAD, *p; u32 res = _FAIL; uint len, ori_len; struct ieee80211_hdr *pwlanhdr; u8 mic[16]; struct mlme_ext_priv *pmlmeext = &padapter->mlmeextpriv; __le16 le_tmp; __le64 le_tmp64; ori_len = pattrib->pkt_len-WLAN_HDR_A3_LEN+BIP_AAD_SIZE; BIP_AAD = rtw_zmalloc(ori_len); if (!BIP_AAD) return _FAIL; /* PKT start */ pframe = (unsigned char *)((union recv_frame *)precvframe)->u.hdr.rx_data; /* mapping to wlan header */ pwlanhdr = (struct ieee80211_hdr *)pframe; /* save the frame body + MME */ memcpy(BIP_AAD+BIP_AAD_SIZE, pframe+WLAN_HDR_A3_LEN, pattrib->pkt_len-WLAN_HDR_A3_LEN); /* find MME IE pointer */ p = rtw_get_ie(BIP_AAD+BIP_AAD_SIZE, WLAN_EID_MMIE, &len, pattrib->pkt_len-WLAN_HDR_A3_LEN); /* Baron */ if (p) { u16 keyid = 0; u64 temp_ipn = 0; /* save packet number */ memcpy(&le_tmp64, p+4, 6); temp_ipn = le64_to_cpu(le_tmp64); /* BIP packet number should bigger than previous BIP packet */ if (temp_ipn <= pmlmeext->mgnt_80211w_IPN_rx) goto BIP_exit; /* copy key index */ memcpy(&le_tmp, p+2, 2); keyid = le16_to_cpu(le_tmp); if (keyid != padapter->securitypriv.dot11wBIPKeyid) goto BIP_exit; /* clear the MIC field of MME to zero */ memset(p+2+len-8, 0, 8); /* conscruct AAD, copy frame control field */ memcpy(BIP_AAD, &pwlanhdr->frame_control, 2); ClearRetry(BIP_AAD); ClearPwrMgt(BIP_AAD); ClearMData(BIP_AAD); /* conscruct AAD, copy address 1 to address 3 */ memcpy(BIP_AAD+2, pwlanhdr->addr1, 18); if (omac1_aes_128(padapter->securitypriv.dot11wBIPKey[padapter->securitypriv.dot11wBIPKeyid].skey , BIP_AAD, ori_len, mic)) goto BIP_exit; /* MIC field should be last 8 bytes of packet (packet without FCS) */ if (!memcmp(mic, pframe+pattrib->pkt_len-8, 8)) { pmlmeext->mgnt_80211w_IPN_rx = temp_ipn; res = _SUCCESS; } else { } } else { res = RTW_RX_HANDLED; } BIP_exit: kfree(BIP_AAD); return res; } static void gf_mulx(u8 *pad) { int i, carry; carry = pad[0] & 0x80; for (i = 0; i < AES_BLOCK_SIZE - 1; i++) pad[i] = (pad[i] << 1) | (pad[i + 1] >> 7); pad[AES_BLOCK_SIZE - 1] <<= 1; if (carry) pad[AES_BLOCK_SIZE - 1] ^= 0x87; } /** * omac1_aes_128_vector - One-Key CBC MAC (OMAC1) hash with AES-128 * @key: 128-bit key for the hash operation * @num_elem: Number of elements in the data vector * @addr: Pointers to the data areas * @len: Lengths of the data blocks * @mac: Buffer for MAC (128 bits, i.e., 16 bytes) * Returns: 0 on success, -1 on failure * * This is a mode for using block cipher (AES in this case) for authentication. * OMAC1 was standardized with the name CMAC by NIST in a Special Publication * (SP) 800-38B. */ static int omac1_aes_128_vector(u8 *key, size_t num_elem, u8 *addr[], size_t *len, u8 *mac) { struct crypto_aes_ctx ctx; u8 cbc[AES_BLOCK_SIZE], pad[AES_BLOCK_SIZE]; u8 *pos, *end; size_t i, e, left, total_len; int ret; ret = aes_expandkey(&ctx, key, 16); if (ret) return -1; memset(cbc, 0, AES_BLOCK_SIZE); total_len = 0; for (e = 0; e < num_elem; e++) total_len += len[e]; left = total_len; e = 0; pos = addr[0]; end = pos + len[0]; while (left >= AES_BLOCK_SIZE) { for (i = 0; i < AES_BLOCK_SIZE; i++) { cbc[i] ^= *pos++; if (pos >= end) { e++; pos = addr[e]; end = pos + len[e]; } } if (left > AES_BLOCK_SIZE) aes_encrypt(&ctx, cbc, cbc); left -= AES_BLOCK_SIZE; } memset(pad, 0, AES_BLOCK_SIZE); aes_encrypt(&ctx, pad, pad); gf_mulx(pad); if (left || total_len == 0) { for (i = 0; i < left; i++) { cbc[i] ^= *pos++; if (pos >= end) { e++; pos = addr[e]; end = pos + len[e]; } } cbc[left] ^= 0x80; gf_mulx(pad); } for (i = 0; i < AES_BLOCK_SIZE; i++) pad[i] ^= cbc[i]; aes_encrypt(&ctx, pad, mac); memzero_explicit(&ctx, sizeof(ctx)); return 0; } /** * omac1_aes_128 - One-Key CBC MAC (OMAC1) hash with AES-128 (aka AES-CMAC) * @key: 128-bit key for the hash operation * @data: Data buffer for which a MAC is determined * @data_len: Length of data buffer in bytes * @mac: Buffer for MAC (128 bits, i.e., 16 bytes) * Returns: 0 on success, -1 on failure * * This is a mode for using block cipher (AES in this case) for authentication. * OMAC1 was standardized with the name CMAC by NIST in a Special Publication * (SP) 800-38B. * modify for CONFIG_IEEE80211W */ int omac1_aes_128(u8 *key, u8 *data, size_t data_len, u8 *mac) { return omac1_aes_128_vector(key, 1, &data, &data_len, mac); } /* Restore HW wep key setting according to key_mask */ void rtw_sec_restore_wep_key(struct adapter *adapter) { struct security_priv *securitypriv = &(adapter->securitypriv); signed int keyid; if ((_WEP40_ == securitypriv->dot11PrivacyAlgrthm) || (_WEP104_ == securitypriv->dot11PrivacyAlgrthm)) { for (keyid = 0; keyid < 4; keyid++) { if (securitypriv->key_mask & BIT(keyid)) { if (keyid == securitypriv->dot11PrivacyKeyIndex) rtw_set_key(adapter, securitypriv, keyid, 1, false); else rtw_set_key(adapter, securitypriv, keyid, 0, false); } } } } u8 rtw_handle_tkip_countermeasure(struct adapter *adapter, const char *caller) { struct security_priv *securitypriv = &(adapter->securitypriv); u8 status = _SUCCESS; if (securitypriv->btkip_countermeasure) { unsigned long passing_ms = jiffies_to_msecs(jiffies - securitypriv->btkip_countermeasure_time); if (passing_ms > 60*1000) { netdev_dbg(adapter->pnetdev, "%s(%s) countermeasure time:%lus > 60s\n", caller, ADPT_ARG(adapter), passing_ms / 1000); securitypriv->btkip_countermeasure = false; securitypriv->btkip_countermeasure_time = 0; } else { netdev_dbg(adapter->pnetdev, "%s(%s) countermeasure time:%lus < 60s\n", caller, ADPT_ARG(adapter), passing_ms / 1000); status = _FAIL; } } return status; }