/****************************************************************************** * * Copyright(c) 2016 - 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. * *****************************************************************************/ #ifdef CONFIG_WAPI_SUPPORT #include #include #include #include #ifdef CONFIG_WAPI_SW_SMS4 #define WAPI_LITTLE_ENDIAN /* #define BIG_ENDIAN */ #define ENCRYPT 0 #define DECRYPT 1 /********************************************************** **********************************************************/ const u8 Sbox[256] = { 0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05, 0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99, 0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62, 0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6, 0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8, 0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35, 0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87, 0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e, 0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1, 0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3, 0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f, 0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51, 0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8, 0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0, 0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84, 0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48 }; const u32 CK[32] = { 0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269, 0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9, 0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249, 0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9, 0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229, 0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299, 0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209, 0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279 }; #define Rotl(_x, _y) (((_x) << (_y)) | ((_x) >> (32 - (_y)))) #define ByteSub(_A) (Sbox[(_A) >> 24 & 0xFF] << 24 | \ Sbox[(_A) >> 16 & 0xFF] << 16 | \ Sbox[(_A) >> 8 & 0xFF] << 8 | \ Sbox[(_A) & 0xFF]) #define L1(_B) ((_B) ^ Rotl(_B, 2) ^ Rotl(_B, 10) ^ Rotl(_B, 18) ^ Rotl(_B, 24)) #define L2(_B) ((_B) ^ Rotl(_B, 13) ^ Rotl(_B, 23)) static void xor_block(void *dst, void *src1, void *src2) /* 128-bit xor: *dst = *src1 xor *src2. Pointers must be 32-bit aligned */ { ((u32 *)dst)[0] = ((u32 *)src1)[0] ^ ((u32 *)src2)[0]; ((u32 *)dst)[1] = ((u32 *)src1)[1] ^ ((u32 *)src2)[1]; ((u32 *)dst)[2] = ((u32 *)src1)[2] ^ ((u32 *)src2)[2]; ((u32 *)dst)[3] = ((u32 *)src1)[3] ^ ((u32 *)src2)[3]; } void SMS4Crypt(u8 *Input, u8 *Output, u32 *rk) { u32 r, mid, x0, x1, x2, x3, *p; p = (u32 *)Input; x0 = p[0]; x1 = p[1]; x2 = p[2]; x3 = p[3]; #ifdef WAPI_LITTLE_ENDIAN x0 = Rotl(x0, 16); x0 = ((x0 & 0x00FF00FF) << 8) | ((x0 & 0xFF00FF00) >> 8); x1 = Rotl(x1, 16); x1 = ((x1 & 0x00FF00FF) << 8) | ((x1 & 0xFF00FF00) >> 8); x2 = Rotl(x2, 16); x2 = ((x2 & 0x00FF00FF) << 8) | ((x2 & 0xFF00FF00) >> 8); x3 = Rotl(x3, 16); x3 = ((x3 & 0x00FF00FF) << 8) | ((x3 & 0xFF00FF00) >> 8); #endif for (r = 0; r < 32; r += 4) { mid = x1 ^ x2 ^ x3 ^ rk[r + 0]; mid = ByteSub(mid); x0 ^= L1(mid); mid = x2 ^ x3 ^ x0 ^ rk[r + 1]; mid = ByteSub(mid); x1 ^= L1(mid); mid = x3 ^ x0 ^ x1 ^ rk[r + 2]; mid = ByteSub(mid); x2 ^= L1(mid); mid = x0 ^ x1 ^ x2 ^ rk[r + 3]; mid = ByteSub(mid); x3 ^= L1(mid); } #ifdef WAPI_LITTLE_ENDIAN x0 = Rotl(x0, 16); x0 = ((x0 & 0x00FF00FF) << 8) | ((x0 & 0xFF00FF00) >> 8); x1 = Rotl(x1, 16); x1 = ((x1 & 0x00FF00FF) << 8) | ((x1 & 0xFF00FF00) >> 8); x2 = Rotl(x2, 16); x2 = ((x2 & 0x00FF00FF) << 8) | ((x2 & 0xFF00FF00) >> 8); x3 = Rotl(x3, 16); x3 = ((x3 & 0x00FF00FF) << 8) | ((x3 & 0xFF00FF00) >> 8); #endif p = (u32 *)Output; p[0] = x3; p[1] = x2; p[2] = x1; p[3] = x0; } void SMS4KeyExt(u8 *Key, u32 *rk, u32 CryptFlag) { u32 r, mid, x0, x1, x2, x3, *p; p = (u32 *)Key; x0 = p[0]; x1 = p[1]; x2 = p[2]; x3 = p[3]; #ifdef WAPI_LITTLE_ENDIAN x0 = Rotl(x0, 16); x0 = ((x0 & 0xFF00FF) << 8) | ((x0 & 0xFF00FF00) >> 8); x1 = Rotl(x1, 16); x1 = ((x1 & 0xFF00FF) << 8) | ((x1 & 0xFF00FF00) >> 8); x2 = Rotl(x2, 16); x2 = ((x2 & 0xFF00FF) << 8) | ((x2 & 0xFF00FF00) >> 8); x3 = Rotl(x3, 16); x3 = ((x3 & 0xFF00FF) << 8) | ((x3 & 0xFF00FF00) >> 8); #endif x0 ^= 0xa3b1bac6; x1 ^= 0x56aa3350; x2 ^= 0x677d9197; x3 ^= 0xb27022dc; for (r = 0; r < 32; r += 4) { mid = x1 ^ x2 ^ x3 ^ CK[r + 0]; mid = ByteSub(mid); rk[r + 0] = x0 ^= L2(mid); mid = x2 ^ x3 ^ x0 ^ CK[r + 1]; mid = ByteSub(mid); rk[r + 1] = x1 ^= L2(mid); mid = x3 ^ x0 ^ x1 ^ CK[r + 2]; mid = ByteSub(mid); rk[r + 2] = x2 ^= L2(mid); mid = x0 ^ x1 ^ x2 ^ CK[r + 3]; mid = ByteSub(mid); rk[r + 3] = x3 ^= L2(mid); } if (CryptFlag == DECRYPT) { for (r = 0; r < 16; r++) mid = rk[r], rk[r] = rk[31 - r], rk[31 - r] = mid; } } void WapiSMS4Cryption(u8 *Key, u8 *IV, u8 *Input, u16 InputLength, u8 *Output, u16 *OutputLength, u32 CryptFlag) { u32 blockNum, i, j, rk[32]; u16 remainder; u8 blockIn[16], blockOut[16], tempIV[16], k; *OutputLength = 0; remainder = InputLength & 0x0F; blockNum = InputLength >> 4; if (remainder != 0) blockNum++; else remainder = 16; for (k = 0; k < 16; k++) tempIV[k] = IV[15 - k]; memcpy(blockIn, tempIV, 16); SMS4KeyExt((u8 *)Key, rk, CryptFlag); for (i = 0; i < blockNum - 1; i++) { SMS4Crypt((u8 *)blockIn, blockOut, rk); xor_block(&Output[i * 16], &Input[i * 16], blockOut); memcpy(blockIn, blockOut, 16); } *OutputLength = i * 16; SMS4Crypt((u8 *)blockIn, blockOut, rk); for (j = 0; j < remainder; j++) Output[i * 16 + j] = Input[i * 16 + j] ^ blockOut[j]; *OutputLength += remainder; } void WapiSMS4Encryption(u8 *Key, u8 *IV, u8 *Input, u16 InputLength, u8 *Output, u16 *OutputLength) { WapiSMS4Cryption(Key, IV, Input, InputLength, Output, OutputLength, ENCRYPT); } void WapiSMS4Decryption(u8 *Key, u8 *IV, u8 *Input, u16 InputLength, u8 *Output, u16 *OutputLength) { /* OFB mode: is also ENCRYPT flag */ WapiSMS4Cryption(Key, IV, Input, InputLength, Output, OutputLength, ENCRYPT); } void WapiSMS4CalculateMic(u8 *Key, u8 *IV, u8 *Input1, u8 Input1Length, u8 *Input2, u16 Input2Length, u8 *Output, u8 *OutputLength) { u32 blockNum, i, remainder, rk[32]; u8 BlockIn[16], BlockOut[16], TempBlock[16], tempIV[16], k; *OutputLength = 0; remainder = Input1Length & 0x0F; blockNum = Input1Length >> 4; for (k = 0; k < 16; k++) tempIV[k] = IV[15 - k]; memcpy(BlockIn, tempIV, 16); SMS4KeyExt((u8 *)Key, rk, ENCRYPT); SMS4Crypt((u8 *)BlockIn, BlockOut, rk); for (i = 0; i < blockNum; i++) { xor_block(BlockIn, (Input1 + i * 16), BlockOut); SMS4Crypt((u8 *)BlockIn, BlockOut, rk); } if (remainder != 0) { memset(TempBlock, 0, 16); memcpy(TempBlock, (Input1 + blockNum * 16), remainder); xor_block(BlockIn, TempBlock, BlockOut); SMS4Crypt((u8 *)BlockIn, BlockOut, rk); } remainder = Input2Length & 0x0F; blockNum = Input2Length >> 4; for (i = 0; i < blockNum; i++) { xor_block(BlockIn, (Input2 + i * 16), BlockOut); SMS4Crypt((u8 *)BlockIn, BlockOut, rk); } if (remainder != 0) { memset(TempBlock, 0, 16); memcpy(TempBlock, (Input2 + blockNum * 16), remainder); xor_block(BlockIn, TempBlock, BlockOut); SMS4Crypt((u8 *)BlockIn, BlockOut, rk); } memcpy(Output, BlockOut, 16); *OutputLength = 16; } void SecCalculateMicSMS4( u8 KeyIdx, u8 *MicKey, u8 *pHeader, u8 *pData, u16 DataLen, u8 *MicBuffer ) { #if 0 struct ieee80211_hdr_3addr_qos *header; u8 TempBuf[34], TempLen = 32, MicLen, QosOffset, *IV; u16 *pTemp, fc; WAPI_TRACE(WAPI_TX | WAPI_RX, "=========>%s\n", __FUNCTION__); header = (struct ieee80211_hdr_3addr_qos *)pHeader; memset(TempBuf, 0, 34); memcpy(TempBuf, pHeader, 2); /* FrameCtrl */ pTemp = (u16 *)TempBuf; *pTemp &= 0xc78f; /* bit4,5,6,11,12,13 */ memcpy((TempBuf + 2), (pHeader + 4), 12); /* Addr1, Addr2 */ memcpy((TempBuf + 14), (pHeader + 22), 2); /* SeqCtrl */ pTemp = (u16 *)(TempBuf + 14); *pTemp &= 0x000f; memcpy((TempBuf + 16), (pHeader + 16), 6); /* Addr3 */ fc = le16_to_cpu(header->frame_ctl); if (GetFrDs((u16 *)&fc) && GetToDs((u16 *)&fc)) { memcpy((TempBuf + 22), (pHeader + 24), 6); QosOffset = 30; } else { memset((TempBuf + 22), 0, 6); QosOffset = 24; } if ((fc & 0x0088) == 0x0088) { memcpy((TempBuf + 28), (pHeader + QosOffset), 2); TempLen += 2; /* IV = pHeader + QosOffset + 2 + SNAP_SIZE + sizeof(u16) + 2; */ IV = pHeader + QosOffset + 2 + 2; } else { IV = pHeader + QosOffset + 2; /* IV = pHeader + QosOffset + SNAP_SIZE + sizeof(u16) + 2; */ } TempBuf[TempLen - 1] = (u8)(DataLen & 0xff); TempBuf[TempLen - 2] = (u8)((DataLen & 0xff00) >> 8); TempBuf[TempLen - 4] = KeyIdx; WAPI_DATA(WAPI_TX, "CalculateMic - KEY", MicKey, 16); WAPI_DATA(WAPI_TX, "CalculateMic - IV", IV, 16); WAPI_DATA(WAPI_TX, "CalculateMic - TempBuf", TempBuf, TempLen); WAPI_DATA(WAPI_TX, "CalculateMic - pData", pData, DataLen); WapiSMS4CalculateMic(MicKey, IV, TempBuf, TempLen, pData, DataLen, MicBuffer, &MicLen); if (MicLen != 16) WAPI_TRACE(WAPI_ERR, "%s: MIC Length Error!!\n", __FUNCTION__); WAPI_TRACE(WAPI_TX | WAPI_RX, "<=========%s\n", __FUNCTION__); #endif } /* AddCount: 1 or 2. * If overflow, return 1, * else return 0. */ u8 WapiIncreasePN(u8 *PN, u8 AddCount) { u8 i; if (NULL == PN) return 1; /* YJ,test,091102 */ /* if(AddCount == 2){ RTW_INFO("############################%s(): PN[0]=0x%x\n", __FUNCTION__, PN[0]); if(PN[0] == 0x48){ PN[0] += AddCount; return 1; }else{ PN[0] += AddCount; return 0; } } */ /* YJ,test,091102,end */ for (i = 0; i < 16; i++) { if (PN[i] + AddCount <= 0xff) { PN[i] += AddCount; return 0; } else { PN[i] += AddCount; AddCount = 1; } } return 1; } void WapiGetLastRxUnicastPNForQoSData( u8 UserPriority, PRT_WAPI_STA_INFO pWapiStaInfo, u8 *PNOut ) { WAPI_TRACE(WAPI_RX, "===========> %s\n", __FUNCTION__); switch (UserPriority) { case 0: case 3: memcpy(PNOut, pWapiStaInfo->lastRxUnicastPNBEQueue, 16); break; case 1: case 2: memcpy(PNOut, pWapiStaInfo->lastRxUnicastPNBKQueue, 16); break; case 4: case 5: memcpy(PNOut, pWapiStaInfo->lastRxUnicastPNVIQueue, 16); break; case 6: case 7: memcpy(PNOut, pWapiStaInfo->lastRxUnicastPNVOQueue, 16); break; default: WAPI_TRACE(WAPI_ERR, "%s: Unknown TID\n", __FUNCTION__); break; } WAPI_TRACE(WAPI_RX, "<=========== %s\n", __FUNCTION__); } void WapiSetLastRxUnicastPNForQoSData( u8 UserPriority, u8 *PNIn, PRT_WAPI_STA_INFO pWapiStaInfo ) { WAPI_TRACE(WAPI_RX, "===========> %s\n", __FUNCTION__); switch (UserPriority) { case 0: case 3: memcpy(pWapiStaInfo->lastRxUnicastPNBEQueue, PNIn, 16); break; case 1: case 2: memcpy(pWapiStaInfo->lastRxUnicastPNBKQueue, PNIn, 16); break; case 4: case 5: memcpy(pWapiStaInfo->lastRxUnicastPNVIQueue, PNIn, 16); break; case 6: case 7: memcpy(pWapiStaInfo->lastRxUnicastPNVOQueue, PNIn, 16); break; default: WAPI_TRACE(WAPI_ERR, "%s: Unknown TID\n", __FUNCTION__); break; } WAPI_TRACE(WAPI_RX, "<=========== %s\n", __FUNCTION__); } /**************************************************************************** FALSE not RX-Reorder TRUE do RX Reorder add to support WAPI to N-mode *****************************************************************************/ u8 WapiCheckPnInSwDecrypt( _adapter *padapter, struct sk_buff *pskb ) { u8 ret = false; #if 0 struct ieee80211_hdr_3addr_qos *header; u16 fc; u8 *pDaddr, *pTaddr, *pRaddr; header = (struct ieee80211_hdr_3addr_qos *)pskb->data; pTaddr = header->addr2; pRaddr = header->addr1; fc = le16_to_cpu(header->frame_ctl); if (GetToDs(&fc)) pDaddr = header->addr3; else pDaddr = header->addr1; if ((_rtw_memcmp(pRaddr, padapter->pnetdev->dev_addr, ETH_ALEN) == 0) && !(pDaddr) && (GetFrameType(&fc) == WIFI_QOS_DATA_TYPE)) /* && ieee->pHTInfo->bCurrentHTSupport && */ /* ieee->pHTInfo->bCurRxReorderEnable) */ ret = false; else ret = true; #endif WAPI_TRACE(WAPI_RX, "%s: return %d\n", __FUNCTION__, ret); return ret; } int SecSMS4HeaderFillIV(_adapter *padapter, u8 *pxmitframe) { struct pkt_attrib *pattrib = &((struct xmit_frame *)pxmitframe)->attrib; u8 *frame = ((struct xmit_frame *)pxmitframe)->buf_addr + TXDESC_OFFSET; u8 *pSecHeader = NULL, *pos = NULL, *pRA = NULL; u8 bPNOverflow = false, bFindMatchPeer = false, hdr_len = 0; PWLAN_HEADER_WAPI_EXTENSION pWapiExt = NULL; PRT_WAPI_T pWapiInfo = &padapter->wapiInfo; PRT_WAPI_STA_INFO pWapiSta = NULL; int ret = 0; WAPI_TRACE(WAPI_TX, "=========>%s\n", __FUNCTION__); return ret; #if 0 hdr_len = sMacHdrLng; if (GetFrameType(pskb->data) == WIFI_QOS_DATA_TYPE) hdr_len += 2; /* hdr_len += SNAP_SIZE + sizeof(u16); */ pos = skb_push(pskb, padapter->wapiInfo.extra_prefix_len); memmove(pos, pos + padapter->wapiInfo.extra_prefix_len, hdr_len); pSecHeader = pskb->data + hdr_len; pWapiExt = (PWLAN_HEADER_WAPI_EXTENSION)pSecHeader; pRA = pskb->data + 4; WAPI_DATA(WAPI_TX, "FillIV - Before Fill IV", pskb->data, pskb->len); /* Address 1 is always receiver's address */ if (IS_MCAST(pRA)) { if (!pWapiInfo->wapiTxMsk.bTxEnable) { WAPI_TRACE(WAPI_ERR, "%s: bTxEnable = 0!!\n", __FUNCTION__); return -2; } if (pWapiInfo->wapiTxMsk.keyId <= 1) { pWapiExt->KeyIdx = pWapiInfo->wapiTxMsk.keyId; pWapiExt->Reserved = 0; bPNOverflow = WapiIncreasePN(pWapiInfo->lastTxMulticastPN, 1); memcpy(pWapiExt->PN, pWapiInfo->lastTxMulticastPN, 16); if (bPNOverflow) { /* Update MSK Notification. */ WAPI_TRACE(WAPI_ERR, "===============>%s():multicast PN overflow\n", __FUNCTION__); rtw_wapi_app_event_handler(padapter, NULL, 0, pRA, false, false, true, 0, false); } } else { WAPI_TRACE(WAPI_ERR, "%s: Invalid Wapi Multicast KeyIdx!!\n", __FUNCTION__); ret = -3; } } else { list_for_each_entry(pWapiSta, &pWapiInfo->wapiSTAUsedList, list) { if (!memcmp(pWapiSta->PeerMacAddr, pRA, 6)) { bFindMatchPeer = true; break; } } if (bFindMatchPeer) { if ((!pWapiSta->wapiUskUpdate.bTxEnable) && (!pWapiSta->wapiUsk.bTxEnable)) { WAPI_TRACE(WAPI_ERR, "%s: bTxEnable = 0!!\n", __FUNCTION__); return -4; } if (pWapiSta->wapiUsk.keyId <= 1) { if (pWapiSta->wapiUskUpdate.bTxEnable) pWapiExt->KeyIdx = pWapiSta->wapiUskUpdate.keyId; else pWapiExt->KeyIdx = pWapiSta->wapiUsk.keyId; pWapiExt->Reserved = 0; bPNOverflow = WapiIncreasePN(pWapiSta->lastTxUnicastPN, 2); memcpy(pWapiExt->PN, pWapiSta->lastTxUnicastPN, 16); if (bPNOverflow) { /* Update USK Notification. */ WAPI_TRACE(WAPI_ERR, "===============>%s():unicast PN overflow\n", __FUNCTION__); rtw_wapi_app_event_handler(padapter, NULL, 0, pWapiSta->PeerMacAddr, false, true, false, 0, false); } } else { WAPI_TRACE(WAPI_ERR, "%s: Invalid Wapi Unicast KeyIdx!!\n", __FUNCTION__); ret = -5; } } else { WAPI_TRACE(WAPI_ERR, "%s: Can not find Peer Sta "MAC_FMT"!!\n", __FUNCTION__, MAC_ARG(pRA)); ret = -6; } } WAPI_DATA(WAPI_TX, "FillIV - After Fill IV", pskb->data, pskb->len); WAPI_TRACE(WAPI_TX, "<=========%s\n", __FUNCTION__); return ret; #endif } /* WAPI SW Enc: must have done Coalesce! */ void SecSWSMS4Encryption( _adapter *padapter, u8 *pxmitframe ) { PRT_WAPI_T pWapiInfo = &padapter->wapiInfo; PRT_WAPI_STA_INFO pWapiSta = NULL; u8 *pframe = ((struct xmit_frame *)pxmitframe)->buf_addr + TXDESC_SIZE; struct pkt_attrib *pattrib = &((struct xmit_frame *)pxmitframe)->attrib; u8 *SecPtr = NULL, *pRA, *pMicKey = NULL, *pDataKey = NULL, *pIV = NULL; u8 IVOffset, DataOffset, bFindMatchPeer = false, KeyIdx = 0, MicBuffer[16]; u16 OutputLength; WAPI_TRACE(WAPI_TX, "=========>%s\n", __FUNCTION__); WAPI_TRACE(WAPI_TX, "hdrlen: %d\n", pattrib->hdrlen); return; DataOffset = pattrib->hdrlen + pattrib->iv_len; pRA = pframe + 4; if (IS_MCAST(pRA)) { KeyIdx = pWapiInfo->wapiTxMsk.keyId; pIV = pWapiInfo->lastTxMulticastPN; pMicKey = pWapiInfo->wapiTxMsk.micKey; pDataKey = pWapiInfo->wapiTxMsk.dataKey; } else { if (!list_empty(&(pWapiInfo->wapiSTAUsedList))) { list_for_each_entry(pWapiSta, &pWapiInfo->wapiSTAUsedList, list) { if (0 == memcmp(pWapiSta->PeerMacAddr, pRA, 6)) { bFindMatchPeer = true; break; } } if (bFindMatchPeer) { if (pWapiSta->wapiUskUpdate.bTxEnable) { KeyIdx = pWapiSta->wapiUskUpdate.keyId; WAPI_TRACE(WAPI_TX, "%s(): Use update USK!! KeyIdx=%d\n", __FUNCTION__, KeyIdx); pIV = pWapiSta->lastTxUnicastPN; pMicKey = pWapiSta->wapiUskUpdate.micKey; pDataKey = pWapiSta->wapiUskUpdate.dataKey; } else { KeyIdx = pWapiSta->wapiUsk.keyId; WAPI_TRACE(WAPI_TX, "%s(): Use USK!! KeyIdx=%d\n", __FUNCTION__, KeyIdx); pIV = pWapiSta->lastTxUnicastPN; pMicKey = pWapiSta->wapiUsk.micKey; pDataKey = pWapiSta->wapiUsk.dataKey; } } else { WAPI_TRACE(WAPI_ERR, "%s: Can not find Peer Sta!!\n", __FUNCTION__); return; } } else { WAPI_TRACE(WAPI_ERR, "%s: wapiSTAUsedList is empty!!\n", __FUNCTION__); return; } } SecPtr = pframe; SecCalculateMicSMS4(KeyIdx, pMicKey, SecPtr, (SecPtr + DataOffset), pattrib->pktlen, MicBuffer); WAPI_DATA(WAPI_TX, "Encryption - MIC", MicBuffer, padapter->wapiInfo.extra_postfix_len); memcpy(pframe + pattrib->hdrlen + pattrib->iv_len + pattrib->pktlen - pattrib->icv_len, (u8 *)MicBuffer, padapter->wapiInfo.extra_postfix_len ); WapiSMS4Encryption(pDataKey, pIV, (SecPtr + DataOffset), pattrib->pktlen + pattrib->icv_len, (SecPtr + DataOffset), &OutputLength); WAPI_DATA(WAPI_TX, "Encryption - After SMS4 encryption", pframe, pattrib->hdrlen + pattrib->iv_len + pattrib->pktlen); WAPI_TRACE(WAPI_TX, "<=========%s\n", __FUNCTION__); } u8 SecSWSMS4Decryption( _adapter *padapter, u8 *precv_frame, struct recv_priv *precv_priv ) { PRT_WAPI_T pWapiInfo = &padapter->wapiInfo; struct recv_frame_hdr *precv_hdr; PRT_WAPI_STA_INFO pWapiSta = NULL; u8 IVOffset, DataOffset, bFindMatchPeer = false, bUseUpdatedKey = false; u8 KeyIdx, MicBuffer[16], lastRxPNforQoS[16]; u8 *pRA, *pTA, *pMicKey, *pDataKey, *pLastRxPN, *pRecvPN, *pSecData, *pRecvMic, *pos; u8 TID = 0; u16 OutputLength, DataLen; u8 bQosData; struct sk_buff *pskb; WAPI_TRACE(WAPI_RX, "=========>%s\n", __FUNCTION__); return 0; precv_hdr = &((union recv_frame *)precv_frame)->u.hdr; pskb = (struct sk_buff *)(precv_hdr->rx_data); precv_hdr->bWapiCheckPNInDecrypt = WapiCheckPnInSwDecrypt(padapter, pskb); WAPI_TRACE(WAPI_RX, "=========>%s: check PN %d\n", __FUNCTION__, precv_hdr->bWapiCheckPNInDecrypt); WAPI_DATA(WAPI_RX, "Decryption - Before decryption", pskb->data, pskb->len); IVOffset = sMacHdrLng; bQosData = GetFrameType(pskb->data) == WIFI_QOS_DATA_TYPE; if (bQosData) IVOffset += 2; /* if(GetHTC()) */ /* IVOffset += 4; */ /* IVOffset += SNAP_SIZE + sizeof(u16); */ DataOffset = IVOffset + padapter->wapiInfo.extra_prefix_len; pRA = pskb->data + 4; pTA = pskb->data + 10; KeyIdx = *(pskb->data + IVOffset); pRecvPN = pskb->data + IVOffset + 2; pSecData = pskb->data + DataOffset; DataLen = pskb->len - DataOffset; pRecvMic = pskb->data + pskb->len - padapter->wapiInfo.extra_postfix_len; TID = GetTid(pskb->data); if (!list_empty(&(pWapiInfo->wapiSTAUsedList))) { list_for_each_entry(pWapiSta, &pWapiInfo->wapiSTAUsedList, list) { if (0 == memcmp(pWapiSta->PeerMacAddr, pTA, 6)) { bFindMatchPeer = true; break; } } } if (!bFindMatchPeer) { WAPI_TRACE(WAPI_ERR, "%s: Can not find Peer Sta "MAC_FMT" for Key Info!!!\n", __FUNCTION__, MAC_ARG(pTA)); return false; } if (IS_MCAST(pRA)) { WAPI_TRACE(WAPI_RX, "%s: Multicast decryption !!!\n", __FUNCTION__); if (pWapiSta->wapiMsk.keyId == KeyIdx && pWapiSta->wapiMsk.bSet) { pLastRxPN = pWapiSta->lastRxMulticastPN; if (!WapiComparePN(pRecvPN, pLastRxPN)) { WAPI_TRACE(WAPI_ERR, "%s: MSK PN is not larger than last, Dropped!!!\n", __FUNCTION__); WAPI_DATA(WAPI_ERR, "pRecvPN:", pRecvPN, 16); WAPI_DATA(WAPI_ERR, "pLastRxPN:", pLastRxPN, 16); return false; } memcpy(pLastRxPN, pRecvPN, 16); pMicKey = pWapiSta->wapiMsk.micKey; pDataKey = pWapiSta->wapiMsk.dataKey; } else if (pWapiSta->wapiMskUpdate.keyId == KeyIdx && pWapiSta->wapiMskUpdate.bSet) { WAPI_TRACE(WAPI_RX, "%s: Use Updated MSK for Decryption !!!\n", __FUNCTION__); bUseUpdatedKey = true; memcpy(pWapiSta->lastRxMulticastPN, pRecvPN, 16); pMicKey = pWapiSta->wapiMskUpdate.micKey; pDataKey = pWapiSta->wapiMskUpdate.dataKey; } else { WAPI_TRACE(WAPI_ERR, "%s: Can not find MSK with matched KeyIdx(%d), Dropped !!!\n", __FUNCTION__, KeyIdx); return false; } } else { WAPI_TRACE(WAPI_RX, "%s: Unicast decryption !!!\n", __FUNCTION__); if (pWapiSta->wapiUsk.keyId == KeyIdx && pWapiSta->wapiUsk.bSet) { WAPI_TRACE(WAPI_RX, "%s: Use USK for Decryption!!!\n", __FUNCTION__); if (precv_hdr->bWapiCheckPNInDecrypt) { if (GetFrameType(pskb->data) == WIFI_QOS_DATA_TYPE) { WapiGetLastRxUnicastPNForQoSData(TID, pWapiSta, lastRxPNforQoS); pLastRxPN = lastRxPNforQoS; } else pLastRxPN = pWapiSta->lastRxUnicastPN; if (!WapiComparePN(pRecvPN, pLastRxPN)) return false; if (bQosData) WapiSetLastRxUnicastPNForQoSData(TID, pRecvPN, pWapiSta); else memcpy(pWapiSta->lastRxUnicastPN, pRecvPN, 16); } else memcpy(precv_hdr->WapiTempPN, pRecvPN, 16); if (check_fwstate(&padapter->mlmepriv, WIFI_STATION_STATE)) { if ((pRecvPN[0] & 0x1) == 0) { WAPI_TRACE(WAPI_ERR, "%s: Rx USK PN is not odd when Infra STA mode, Dropped !!!\n", __FUNCTION__); return false; } } pMicKey = pWapiSta->wapiUsk.micKey; pDataKey = pWapiSta->wapiUsk.dataKey; } else if (pWapiSta->wapiUskUpdate.keyId == KeyIdx && pWapiSta->wapiUskUpdate.bSet) { WAPI_TRACE(WAPI_RX, "%s: Use Updated USK for Decryption!!!\n", __FUNCTION__); if (pWapiSta->bAuthenticatorInUpdata) bUseUpdatedKey = true; else bUseUpdatedKey = false; if (bQosData) WapiSetLastRxUnicastPNForQoSData(TID, pRecvPN, pWapiSta); else memcpy(pWapiSta->lastRxUnicastPN, pRecvPN, 16); pMicKey = pWapiSta->wapiUskUpdate.micKey; pDataKey = pWapiSta->wapiUskUpdate.dataKey; } else { WAPI_TRACE(WAPI_ERR, "%s: No valid USK!!!KeyIdx=%d pWapiSta->wapiUsk.keyId=%d pWapiSta->wapiUskUpdate.keyId=%d\n", __FUNCTION__, KeyIdx, pWapiSta->wapiUsk.keyId, pWapiSta->wapiUskUpdate.keyId); /* dump_buf(pskb->data,pskb->len); */ return false; } } WAPI_DATA(WAPI_RX, "Decryption - DataKey", pDataKey, 16); WAPI_DATA(WAPI_RX, "Decryption - IV", pRecvPN, 16); WapiSMS4Decryption(pDataKey, pRecvPN, pSecData, DataLen, pSecData, &OutputLength); if (OutputLength != DataLen) WAPI_TRACE(WAPI_ERR, "%s: Output Length Error!!!!\n", __FUNCTION__); WAPI_DATA(WAPI_RX, "Decryption - After decryption", pskb->data, pskb->len); DataLen -= padapter->wapiInfo.extra_postfix_len; SecCalculateMicSMS4(KeyIdx, pMicKey, pskb->data, pSecData, DataLen, MicBuffer); WAPI_DATA(WAPI_RX, "Decryption - MIC received", pRecvMic, SMS4_MIC_LEN); WAPI_DATA(WAPI_RX, "Decryption - MIC calculated", MicBuffer, SMS4_MIC_LEN); if (0 == memcmp(MicBuffer, pRecvMic, padapter->wapiInfo.extra_postfix_len)) { WAPI_TRACE(WAPI_RX, "%s: Check MIC OK!!\n", __FUNCTION__); if (bUseUpdatedKey) { /* delete the old key */ if (IS_MCAST(pRA)) { WAPI_TRACE(WAPI_API, "%s(): AE use new update MSK!!\n", __FUNCTION__); pWapiSta->wapiMsk.keyId = pWapiSta->wapiMskUpdate.keyId; memcpy(pWapiSta->wapiMsk.dataKey, pWapiSta->wapiMskUpdate.dataKey, 16); memcpy(pWapiSta->wapiMsk.micKey, pWapiSta->wapiMskUpdate.micKey, 16); pWapiSta->wapiMskUpdate.bTxEnable = pWapiSta->wapiMskUpdate.bSet = false; } else { WAPI_TRACE(WAPI_API, "%s(): AE use new update USK!!\n", __FUNCTION__); pWapiSta->wapiUsk.keyId = pWapiSta->wapiUskUpdate.keyId; memcpy(pWapiSta->wapiUsk.dataKey, pWapiSta->wapiUskUpdate.dataKey, 16); memcpy(pWapiSta->wapiUsk.micKey, pWapiSta->wapiUskUpdate.micKey, 16); pWapiSta->wapiUskUpdate.bTxEnable = pWapiSta->wapiUskUpdate.bSet = false; } } } else { WAPI_TRACE(WAPI_ERR, "%s: Check MIC Error, Dropped !!!!\n", __FUNCTION__); return false; } pos = pskb->data; memmove(pos + padapter->wapiInfo.extra_prefix_len, pos, IVOffset); skb_pull(pskb, padapter->wapiInfo.extra_prefix_len); WAPI_TRACE(WAPI_RX, "<=========%s\n", __FUNCTION__); return true; } u32 rtw_sms4_encrypt(_adapter *padapter, u8 *pxmitframe) { u8 *pframe; u32 res = _SUCCESS; WAPI_TRACE(WAPI_TX, "=========>%s\n", __FUNCTION__); if ((!padapter->WapiSupport) || (!padapter->wapiInfo.bWapiEnable)) { WAPI_TRACE(WAPI_TX, "<========== %s, WAPI not supported or enabled!\n", __FUNCTION__); return _FAIL; } if (((struct xmit_frame *)pxmitframe)->buf_addr == NULL) return _FAIL; pframe = ((struct xmit_frame *)pxmitframe)->buf_addr + TXDESC_OFFSET; SecSWSMS4Encryption(padapter, pxmitframe); WAPI_TRACE(WAPI_TX, "<=========%s\n", __FUNCTION__); return res; } u32 rtw_sms4_decrypt(_adapter *padapter, u8 *precvframe) { u8 *pframe; u32 res = _SUCCESS; WAPI_TRACE(WAPI_RX, "=========>%s\n", __FUNCTION__); if ((!padapter->WapiSupport) || (!padapter->wapiInfo.bWapiEnable)) { WAPI_TRACE(WAPI_RX, "<========== %s, WAPI not supported or enabled!\n", __FUNCTION__); return _FAIL; } /* drop packet when hw decrypt fail * return tempraily */ return _FAIL; /* pframe=(unsigned char *)((union recv_frame*)precvframe)->u.hdr.rx_data; */ if (false == SecSWSMS4Decryption(padapter, precvframe, &padapter->recvpriv)) { WAPI_TRACE(WAPI_ERR, "%s():SMS4 decrypt frame error\n", __FUNCTION__); return _FAIL; } WAPI_TRACE(WAPI_RX, "<=========%s\n", __FUNCTION__); return res; } #else u32 rtw_sms4_encrypt(_adapter *padapter, u8 *pxmitframe) { WAPI_TRACE(WAPI_TX, "=========>Dummy %s\n", __FUNCTION__); WAPI_TRACE(WAPI_TX, "<=========Dummy %s\n", __FUNCTION__); return _SUCCESS; } u32 rtw_sms4_decrypt(_adapter *padapter, u8 *precvframe) { WAPI_TRACE(WAPI_RX, "=========>Dummy %s\n", __FUNCTION__); WAPI_TRACE(WAPI_RX, "<=========Dummy %s\n", __FUNCTION__); return _SUCCESS; } #endif #endif