diff options
Diffstat (limited to 'drivers/staging/rt2860/common/cmm_tkip.c')
| -rw-r--r-- | drivers/staging/rt2860/common/cmm_tkip.c | 833 |
1 files changed, 0 insertions, 833 deletions
diff --git a/drivers/staging/rt2860/common/cmm_tkip.c b/drivers/staging/rt2860/common/cmm_tkip.c deleted file mode 100644 index 4881ef9ba022..000000000000 --- a/drivers/staging/rt2860/common/cmm_tkip.c +++ /dev/null @@ -1,833 +0,0 @@ -/* - ************************************************************************* - * Ralink Tech Inc. - * 5F., No.36, Taiyuan St., Jhubei City, - * Hsinchu County 302, - * Taiwan, R.O.C. - * - * (c) Copyright 2002-2007, Ralink Technology, Inc. - * - * This program is free software; you can redistribute it and/or modify * - * it under the terms of the GNU General Public License as published by * - * the Free Software Foundation; either version 2 of the License, or * - * (at your option) any later version. * - * * - * This program is distributed in the hope that it will be useful, * - * but WITHOUT ANY WARRANTY; without even the implied warranty of * - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * - * GNU General Public License for more details. * - * * - * You should have received a copy of the GNU General Public License * - * along with this program; if not, write to the * - * Free Software Foundation, Inc., * - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * - * * - ************************************************************************* - - Module Name: - cmm_tkip.c - - Abstract: - - Revision History: - Who When What - -------- ---------- ---------------------------------------------- - Paul Wu 02-25-02 Initial -*/ - -#include "../rt_config.h" - -/* Rotation functions on 32 bit values */ -#define ROL32( A, n ) \ - ( ((A) << (n)) | ( ((A)>>(32-(n))) & ( (1UL << (n)) - 1 ) ) ) -#define ROR32( A, n ) ROL32( (A), 32-(n) ) - -u32 Tkip_Sbox_Lower[256] = { - 0xA5, 0x84, 0x99, 0x8D, 0x0D, 0xBD, 0xB1, 0x54, - 0x50, 0x03, 0xA9, 0x7D, 0x19, 0x62, 0xE6, 0x9A, - 0x45, 0x9D, 0x40, 0x87, 0x15, 0xEB, 0xC9, 0x0B, - 0xEC, 0x67, 0xFD, 0xEA, 0xBF, 0xF7, 0x96, 0x5B, - 0xC2, 0x1C, 0xAE, 0x6A, 0x5A, 0x41, 0x02, 0x4F, - 0x5C, 0xF4, 0x34, 0x08, 0x93, 0x73, 0x53, 0x3F, - 0x0C, 0x52, 0x65, 0x5E, 0x28, 0xA1, 0x0F, 0xB5, - 0x09, 0x36, 0x9B, 0x3D, 0x26, 0x69, 0xCD, 0x9F, - 0x1B, 0x9E, 0x74, 0x2E, 0x2D, 0xB2, 0xEE, 0xFB, - 0xF6, 0x4D, 0x61, 0xCE, 0x7B, 0x3E, 0x71, 0x97, - 0xF5, 0x68, 0x00, 0x2C, 0x60, 0x1F, 0xC8, 0xED, - 0xBE, 0x46, 0xD9, 0x4B, 0xDE, 0xD4, 0xE8, 0x4A, - 0x6B, 0x2A, 0xE5, 0x16, 0xC5, 0xD7, 0x55, 0x94, - 0xCF, 0x10, 0x06, 0x81, 0xF0, 0x44, 0xBA, 0xE3, - 0xF3, 0xFE, 0xC0, 0x8A, 0xAD, 0xBC, 0x48, 0x04, - 0xDF, 0xC1, 0x75, 0x63, 0x30, 0x1A, 0x0E, 0x6D, - 0x4C, 0x14, 0x35, 0x2F, 0xE1, 0xA2, 0xCC, 0x39, - 0x57, 0xF2, 0x82, 0x47, 0xAC, 0xE7, 0x2B, 0x95, - 0xA0, 0x98, 0xD1, 0x7F, 0x66, 0x7E, 0xAB, 0x83, - 0xCA, 0x29, 0xD3, 0x3C, 0x79, 0xE2, 0x1D, 0x76, - 0x3B, 0x56, 0x4E, 0x1E, 0xDB, 0x0A, 0x6C, 0xE4, - 0x5D, 0x6E, 0xEF, 0xA6, 0xA8, 0xA4, 0x37, 0x8B, - 0x32, 0x43, 0x59, 0xB7, 0x8C, 0x64, 0xD2, 0xE0, - 0xB4, 0xFA, 0x07, 0x25, 0xAF, 0x8E, 0xE9, 0x18, - 0xD5, 0x88, 0x6F, 0x72, 0x24, 0xF1, 0xC7, 0x51, - 0x23, 0x7C, 0x9C, 0x21, 0xDD, 0xDC, 0x86, 0x85, - 0x90, 0x42, 0xC4, 0xAA, 0xD8, 0x05, 0x01, 0x12, - 0xA3, 0x5F, 0xF9, 0xD0, 0x91, 0x58, 0x27, 0xB9, - 0x38, 0x13, 0xB3, 0x33, 0xBB, 0x70, 0x89, 0xA7, - 0xB6, 0x22, 0x92, 0x20, 0x49, 0xFF, 0x78, 0x7A, - 0x8F, 0xF8, 0x80, 0x17, 0xDA, 0x31, 0xC6, 0xB8, - 0xC3, 0xB0, 0x77, 0x11, 0xCB, 0xFC, 0xD6, 0x3A -}; - -u32 Tkip_Sbox_Upper[256] = { - 0xC6, 0xF8, 0xEE, 0xF6, 0xFF, 0xD6, 0xDE, 0x91, - 0x60, 0x02, 0xCE, 0x56, 0xE7, 0xB5, 0x4D, 0xEC, - 0x8F, 0x1F, 0x89, 0xFA, 0xEF, 0xB2, 0x8E, 0xFB, - 0x41, 0xB3, 0x5F, 0x45, 0x23, 0x53, 0xE4, 0x9B, - 0x75, 0xE1, 0x3D, 0x4C, 0x6C, 0x7E, 0xF5, 0x83, - 0x68, 0x51, 0xD1, 0xF9, 0xE2, 0xAB, 0x62, 0x2A, - 0x08, 0x95, 0x46, 0x9D, 0x30, 0x37, 0x0A, 0x2F, - 0x0E, 0x24, 0x1B, 0xDF, 0xCD, 0x4E, 0x7F, 0xEA, - 0x12, 0x1D, 0x58, 0x34, 0x36, 0xDC, 0xB4, 0x5B, - 0xA4, 0x76, 0xB7, 0x7D, 0x52, 0xDD, 0x5E, 0x13, - 0xA6, 0xB9, 0x00, 0xC1, 0x40, 0xE3, 0x79, 0xB6, - 0xD4, 0x8D, 0x67, 0x72, 0x94, 0x98, 0xB0, 0x85, - 0xBB, 0xC5, 0x4F, 0xED, 0x86, 0x9A, 0x66, 0x11, - 0x8A, 0xE9, 0x04, 0xFE, 0xA0, 0x78, 0x25, 0x4B, - 0xA2, 0x5D, 0x80, 0x05, 0x3F, 0x21, 0x70, 0xF1, - 0x63, 0x77, 0xAF, 0x42, 0x20, 0xE5, 0xFD, 0xBF, - 0x81, 0x18, 0x26, 0xC3, 0xBE, 0x35, 0x88, 0x2E, - 0x93, 0x55, 0xFC, 0x7A, 0xC8, 0xBA, 0x32, 0xE6, - 0xC0, 0x19, 0x9E, 0xA3, 0x44, 0x54, 0x3B, 0x0B, - 0x8C, 0xC7, 0x6B, 0x28, 0xA7, 0xBC, 0x16, 0xAD, - 0xDB, 0x64, 0x74, 0x14, 0x92, 0x0C, 0x48, 0xB8, - 0x9F, 0xBD, 0x43, 0xC4, 0x39, 0x31, 0xD3, 0xF2, - 0xD5, 0x8B, 0x6E, 0xDA, 0x01, 0xB1, 0x9C, 0x49, - 0xD8, 0xAC, 0xF3, 0xCF, 0xCA, 0xF4, 0x47, 0x10, - 0x6F, 0xF0, 0x4A, 0x5C, 0x38, 0x57, 0x73, 0x97, - 0xCB, 0xA1, 0xE8, 0x3E, 0x96, 0x61, 0x0D, 0x0F, - 0xE0, 0x7C, 0x71, 0xCC, 0x90, 0x06, 0xF7, 0x1C, - 0xC2, 0x6A, 0xAE, 0x69, 0x17, 0x99, 0x3A, 0x27, - 0xD9, 0xEB, 0x2B, 0x22, 0xD2, 0xA9, 0x07, 0x33, - 0x2D, 0x3C, 0x15, 0xC9, 0x87, 0xAA, 0x50, 0xA5, - 0x03, 0x59, 0x09, 0x1A, 0x65, 0xD7, 0x84, 0xD0, - 0x82, 0x29, 0x5A, 0x1E, 0x7B, 0xA8, 0x6D, 0x2C -}; - -/* */ -/* Expanded IV for TKIP function. */ -/* */ -struct PACKED rt_tkip_iv { - union PACKED { - struct PACKED { - u8 rc0; - u8 rc1; - u8 rc2; - - union PACKED { - struct PACKED { - u8 Rsvd:5; - u8 ExtIV:1; - u8 KeyID:2; - } field; - u8 Byte; - } CONTROL; - } field; - - unsigned long word; - } IV16; - - unsigned long IV32; -}; - -/* - ======================================================================== - - Routine Description: - Convert from u8[] to unsigned long in a portable way - - Arguments: - pMICKey pointer to MIC Key - - Return Value: - None - - Note: - - ======================================================================== -*/ -unsigned long RTMPTkipGetUInt32(u8 *pMICKey) -{ - unsigned long res = 0; - int i; - - for (i = 0; i < 4; i++) { - res |= (*pMICKey++) << (8 * i); - } - - return res; -} - -/* - ======================================================================== - - Routine Description: - Convert from unsigned long to u8[] in a portable way - - Arguments: - pDst pointer to destination for convert unsigned long to u8[] - val the value for convert - - Return Value: - None - - IRQL = DISPATCH_LEVEL - - Note: - - ======================================================================== -*/ -void RTMPTkipPutUInt32(IN u8 *pDst, unsigned long val) -{ - int i; - - for (i = 0; i < 4; i++) { - *pDst++ = (u8)(val & 0xff); - val >>= 8; - } -} - -/* - ======================================================================== - - Routine Description: - Set the MIC Key. - - Arguments: - pAd Pointer to our adapter - pMICKey pointer to MIC Key - - Return Value: - None - - IRQL = DISPATCH_LEVEL - - Note: - - ======================================================================== -*/ -void RTMPTkipSetMICKey(struct rt_tkip_key_info *pTkip, u8 *pMICKey) -{ - /* Set the key */ - pTkip->K0 = RTMPTkipGetUInt32(pMICKey); - pTkip->K1 = RTMPTkipGetUInt32(pMICKey + 4); - /* and reset the message */ - pTkip->L = pTkip->K0; - pTkip->R = pTkip->K1; - pTkip->nBytesInM = 0; - pTkip->M = 0; -} - -/* - ======================================================================== - - Routine Description: - Calculate the MIC Value. - - Arguments: - pAd Pointer to our adapter - uChar Append this uChar - - Return Value: - None - - IRQL = DISPATCH_LEVEL - - Note: - - ======================================================================== -*/ -void RTMPTkipAppendByte(struct rt_tkip_key_info *pTkip, u8 uChar) -{ - /* Append the byte to our word-sized buffer */ - pTkip->M |= (uChar << (8 * pTkip->nBytesInM)); - pTkip->nBytesInM++; - /* Process the word if it is full. */ - if (pTkip->nBytesInM >= 4) { - pTkip->L ^= pTkip->M; - pTkip->R ^= ROL32(pTkip->L, 17); - pTkip->L += pTkip->R; - pTkip->R ^= - ((pTkip->L & 0xff00ff00) >> 8) | ((pTkip-> - L & 0x00ff00ff) << 8); - pTkip->L += pTkip->R; - pTkip->R ^= ROL32(pTkip->L, 3); - pTkip->L += pTkip->R; - pTkip->R ^= ROR32(pTkip->L, 2); - pTkip->L += pTkip->R; - /* Clear the buffer */ - pTkip->M = 0; - pTkip->nBytesInM = 0; - } -} - -/* - ======================================================================== - - Routine Description: - Calculate the MIC Value. - - Arguments: - pAd Pointer to our adapter - pSrc Pointer to source data for Calculate MIC Value - Len Indicate the length of the source data - - Return Value: - None - - IRQL = DISPATCH_LEVEL - - Note: - - ======================================================================== -*/ -void RTMPTkipAppend(struct rt_tkip_key_info *pTkip, u8 *pSrc, u32 nBytes) -{ - /* This is simple */ - while (nBytes > 0) { - RTMPTkipAppendByte(pTkip, *pSrc++); - nBytes--; - } -} - -/* - ======================================================================== - - Routine Description: - Get the MIC Value. - - Arguments: - pAd Pointer to our adapter - - Return Value: - None - - IRQL = DISPATCH_LEVEL - - Note: - the MIC Value is store in pAd->PrivateInfo.MIC - ======================================================================== -*/ -void RTMPTkipGetMIC(struct rt_tkip_key_info *pTkip) -{ - /* Append the minimum padding */ - RTMPTkipAppendByte(pTkip, 0x5a); - RTMPTkipAppendByte(pTkip, 0); - RTMPTkipAppendByte(pTkip, 0); - RTMPTkipAppendByte(pTkip, 0); - RTMPTkipAppendByte(pTkip, 0); - /* and then zeroes until the length is a multiple of 4 */ - while (pTkip->nBytesInM != 0) { - RTMPTkipAppendByte(pTkip, 0); - } - /* The appendByte function has already computed the result. */ - RTMPTkipPutUInt32(pTkip->MIC, pTkip->L); - RTMPTkipPutUInt32(pTkip->MIC + 4, pTkip->R); -} - -/* - ======================================================================== - - Routine Description: - Init Tkip function. - - Arguments: - pAd Pointer to our adapter - pTKey Pointer to the Temporal Key (TK), TK shall be 128bits. - KeyId TK Key ID - pTA Pointer to transmitter address - pMICKey pointer to MIC Key - - Return Value: - None - - IRQL = DISPATCH_LEVEL - - Note: - - ======================================================================== -*/ -void RTMPInitTkipEngine(struct rt_rtmp_adapter *pAd, - u8 *pKey, - u8 KeyId, - u8 *pTA, - u8 *pMICKey, - u8 *pTSC, unsigned long *pIV16, unsigned long *pIV32) -{ - struct rt_tkip_iv tkipIv; - - /* Prepare 8 bytes TKIP encapsulation for MPDU */ - NdisZeroMemory(&tkipIv, sizeof(struct rt_tkip_iv)); - tkipIv.IV16.field.rc0 = *(pTSC + 1); - tkipIv.IV16.field.rc1 = (tkipIv.IV16.field.rc0 | 0x20) & 0x7f; - tkipIv.IV16.field.rc2 = *pTSC; - tkipIv.IV16.field.CONTROL.field.ExtIV = 1; /* 0: non-extended IV, 1: an extended IV */ - tkipIv.IV16.field.CONTROL.field.KeyID = KeyId; -/* tkipIv.IV32 = *(unsigned long *)(pTSC + 2); */ - NdisMoveMemory(&tkipIv.IV32, (pTSC + 2), 4); /* Copy IV */ - - *pIV16 = tkipIv.IV16.word; - *pIV32 = tkipIv.IV32; -} - -/* - ======================================================================== - - Routine Description: - Init MIC Value calculation function which include set MIC key & - calculate first 16 bytes (DA + SA + priority + 0) - - Arguments: - pAd Pointer to our adapter - pTKey Pointer to the Temporal Key (TK), TK shall be 128bits. - pDA Pointer to DA address - pSA Pointer to SA address - pMICKey pointer to MIC Key - - Return Value: - None - - Note: - - ======================================================================== -*/ -void RTMPInitMICEngine(struct rt_rtmp_adapter *pAd, - u8 *pKey, - u8 *pDA, - u8 *pSA, u8 UserPriority, u8 *pMICKey) -{ - unsigned long Priority = UserPriority; - - /* Init MIC value calculation */ - RTMPTkipSetMICKey(&pAd->PrivateInfo.Tx, pMICKey); - /* DA */ - RTMPTkipAppend(&pAd->PrivateInfo.Tx, pDA, MAC_ADDR_LEN); - /* SA */ - RTMPTkipAppend(&pAd->PrivateInfo.Tx, pSA, MAC_ADDR_LEN); - /* Priority + 3 bytes of 0 */ - RTMPTkipAppend(&pAd->PrivateInfo.Tx, (u8 *)& Priority, 4); -} - -/* - ======================================================================== - - Routine Description: - Compare MIC value of received MSDU - - Arguments: - pAd Pointer to our adapter - pSrc Pointer to the received Plain text data - pDA Pointer to DA address - pSA Pointer to SA address - pMICKey pointer to MIC Key - Len the length of the received plain text data exclude MIC value - - Return Value: - TRUE MIC value matched - FALSE MIC value mismatched - - IRQL = DISPATCH_LEVEL - - Note: - - ======================================================================== -*/ -BOOLEAN RTMPTkipCompareMICValue(struct rt_rtmp_adapter *pAd, - u8 *pSrc, - u8 *pDA, - u8 *pSA, - u8 *pMICKey, - u8 UserPriority, u32 Len) -{ - u8 OldMic[8]; - unsigned long Priority = UserPriority; - - /* Init MIC value calculation */ - RTMPTkipSetMICKey(&pAd->PrivateInfo.Rx, pMICKey); - /* DA */ - RTMPTkipAppend(&pAd->PrivateInfo.Rx, pDA, MAC_ADDR_LEN); - /* SA */ - RTMPTkipAppend(&pAd->PrivateInfo.Rx, pSA, MAC_ADDR_LEN); - /* Priority + 3 bytes of 0 */ - RTMPTkipAppend(&pAd->PrivateInfo.Rx, (u8 *)& Priority, 4); - - /* Calculate MIC value from plain text data */ - RTMPTkipAppend(&pAd->PrivateInfo.Rx, pSrc, Len); - - /* Get MIC valude from received frame */ - NdisMoveMemory(OldMic, pSrc + Len, 8); - - /* Get MIC value from decrypted plain data */ - RTMPTkipGetMIC(&pAd->PrivateInfo.Rx); - - /* Move MIC value from MSDU, this steps should move to data path. */ - /* Since the MIC value might cross MPDUs. */ - if (!NdisEqualMemory(pAd->PrivateInfo.Rx.MIC, OldMic, 8)) { - DBGPRINT_RAW(RT_DEBUG_ERROR, ("RTMPTkipCompareMICValue(): TKIP MIC Error !\n")); /*MIC error. */ - - return (FALSE); - } - return (TRUE); -} - -/* - ======================================================================== - - Routine Description: - Copy frame from waiting queue into relative ring buffer and set - appropriate ASIC register to kick hardware transmit function - - Arguments: - pAd Pointer to our adapter - void * Pointer to Ndis Packet for MIC calculation - pEncap Pointer to LLC encap data - LenEncap Total encap length, might be 0 which indicates no encap - - Return Value: - None - - IRQL = DISPATCH_LEVEL - - Note: - - ======================================================================== -*/ -void RTMPCalculateMICValue(struct rt_rtmp_adapter *pAd, - void *pPacket, - u8 *pEncap, - struct rt_cipher_key *pKey, u8 apidx) -{ - struct rt_packet_info PacketInfo; - u8 *pSrcBufVA; - u32 SrcBufLen; - u8 *pSrc; - u8 UserPriority; - u8 vlan_offset = 0; - - RTMP_QueryPacketInfo(pPacket, &PacketInfo, &pSrcBufVA, &SrcBufLen); - - UserPriority = RTMP_GET_PACKET_UP(pPacket); - pSrc = pSrcBufVA; - - /* determine if this is a vlan packet */ - if (((*(pSrc + 12) << 8) + *(pSrc + 13)) == 0x8100) - vlan_offset = 4; - - { - RTMPInitMICEngine(pAd, - pKey->Key, - pSrc, pSrc + 6, UserPriority, pKey->TxMic); - } - - if (pEncap != NULL) { - /* LLC encapsulation */ - RTMPTkipAppend(&pAd->PrivateInfo.Tx, pEncap, 6); - /* Protocol Type */ - RTMPTkipAppend(&pAd->PrivateInfo.Tx, pSrc + 12 + vlan_offset, - 2); - } - SrcBufLen -= (14 + vlan_offset); - pSrc += (14 + vlan_offset); - do { - if (SrcBufLen > 0) { - RTMPTkipAppend(&pAd->PrivateInfo.Tx, pSrc, SrcBufLen); - } - - break; /* No need handle next packet */ - - } while (TRUE); /* End of copying payload */ - - /* Compute the final MIC Value */ - RTMPTkipGetMIC(&pAd->PrivateInfo.Tx); -} - -/************************************************************/ -/* tkip_sbox() */ -/* Returns a 16 bit value from a 64K entry table. The Table */ -/* is synthesized from two 256 entry byte wide tables. */ -/************************************************************/ - -u32 tkip_sbox(u32 index) -{ - u32 index_low; - u32 index_high; - u32 left, right; - - index_low = (index % 256); - index_high = ((index >> 8) % 256); - - left = Tkip_Sbox_Lower[index_low] + (Tkip_Sbox_Upper[index_low] * 256); - right = - Tkip_Sbox_Upper[index_high] + (Tkip_Sbox_Lower[index_high] * 256); - - return (left ^ right); -} - -u32 rotr1(u32 a) -{ - unsigned int b; - - if ((a & 0x01) == 0x01) { - b = (a >> 1) | 0x8000; - } else { - b = (a >> 1) & 0x7fff; - } - b = b % 65536; - return b; -} - -void RTMPTkipMixKey(u8 * key, u8 * ta, unsigned long pnl, /* Least significant 16 bits of PN */ - unsigned long pnh, /* Most significant 32 bits of PN */ - u8 * rc4key, u32 * p1k) -{ - - u32 tsc0; - u32 tsc1; - u32 tsc2; - - u32 ppk0; - u32 ppk1; - u32 ppk2; - u32 ppk3; - u32 ppk4; - u32 ppk5; - - int i; - int j; - - tsc0 = (unsigned int)((pnh >> 16) % 65536); /* msb */ - tsc1 = (unsigned int)(pnh % 65536); - tsc2 = (unsigned int)(pnl % 65536); /* lsb */ - - /* Phase 1, step 1 */ - p1k[0] = tsc1; - p1k[1] = tsc0; - p1k[2] = (u32)(ta[0] + (ta[1] * 256)); - p1k[3] = (u32)(ta[2] + (ta[3] * 256)); - p1k[4] = (u32)(ta[4] + (ta[5] * 256)); - - /* Phase 1, step 2 */ - for (i = 0; i < 8; i++) { - j = 2 * (i & 1); - p1k[0] = - (p1k[0] + - tkip_sbox((p1k[4] ^ ((256 * key[1 + j]) + key[j])) % - 65536)) % 65536; - p1k[1] = - (p1k[1] + - tkip_sbox((p1k[0] ^ ((256 * key[5 + j]) + key[4 + j])) % - 65536)) % 65536; - p1k[2] = - (p1k[2] + - tkip_sbox((p1k[1] ^ ((256 * key[9 + j]) + key[8 + j])) % - 65536)) % 65536; - p1k[3] = - (p1k[3] + - tkip_sbox((p1k[2] ^ ((256 * key[13 + j]) + key[12 + j])) % - 65536)) % 65536; - p1k[4] = - (p1k[4] + - tkip_sbox((p1k[3] ^ (((256 * key[1 + j]) + key[j]))) % - 65536)) % 65536; - p1k[4] = (p1k[4] + i) % 65536; - } - - /* Phase 2, Step 1 */ - ppk0 = p1k[0]; - ppk1 = p1k[1]; - ppk2 = p1k[2]; - ppk3 = p1k[3]; - ppk4 = p1k[4]; - ppk5 = (p1k[4] + tsc2) % 65536; - - /* Phase2, Step 2 */ - ppk0 = ppk0 + tkip_sbox((ppk5 ^ ((256 * key[1]) + key[0])) % 65536); - ppk1 = ppk1 + tkip_sbox((ppk0 ^ ((256 * key[3]) + key[2])) % 65536); - ppk2 = ppk2 + tkip_sbox((ppk1 ^ ((256 * key[5]) + key[4])) % 65536); - ppk3 = ppk3 + tkip_sbox((ppk2 ^ ((256 * key[7]) + key[6])) % 65536); - ppk4 = ppk4 + tkip_sbox((ppk3 ^ ((256 * key[9]) + key[8])) % 65536); - ppk5 = ppk5 + tkip_sbox((ppk4 ^ ((256 * key[11]) + key[10])) % 65536); - - ppk0 = ppk0 + rotr1(ppk5 ^ ((256 * key[13]) + key[12])); - ppk1 = ppk1 + rotr1(ppk0 ^ ((256 * key[15]) + key[14])); - ppk2 = ppk2 + rotr1(ppk1); - ppk3 = ppk3 + rotr1(ppk2); - ppk4 = ppk4 + rotr1(ppk3); - ppk5 = ppk5 + rotr1(ppk4); - - /* Phase 2, Step 3 */ - /* Phase 2, Step 3 */ - - tsc0 = (unsigned int)((pnh >> 16) % 65536); /* msb */ - tsc1 = (unsigned int)(pnh % 65536); - tsc2 = (unsigned int)(pnl % 65536); /* lsb */ - - rc4key[0] = (tsc2 >> 8) % 256; - rc4key[1] = (((tsc2 >> 8) % 256) | 0x20) & 0x7f; - rc4key[2] = tsc2 % 256; - rc4key[3] = ((ppk5 ^ ((256 * key[1]) + key[0])) >> 1) % 256; - - rc4key[4] = ppk0 % 256; - rc4key[5] = (ppk0 >> 8) % 256; - - rc4key[6] = ppk1 % 256; - rc4key[7] = (ppk1 >> 8) % 256; - - rc4key[8] = ppk2 % 256; - rc4key[9] = (ppk2 >> 8) % 256; - - rc4key[10] = ppk3 % 256; - rc4key[11] = (ppk3 >> 8) % 256; - - rc4key[12] = ppk4 % 256; - rc4key[13] = (ppk4 >> 8) % 256; - - rc4key[14] = ppk5 % 256; - rc4key[15] = (ppk5 >> 8) % 256; -} - -/* */ -/* TRUE: Success! */ -/* FALSE: Decrypt Error! */ -/* */ -BOOLEAN RTMPSoftDecryptTKIP(struct rt_rtmp_adapter *pAd, - u8 *pData, - unsigned long DataByteCnt, - u8 UserPriority, struct rt_cipher_key *pWpaKey) -{ - u8 KeyID; - u32 HeaderLen; - u8 fc0; - u8 fc1; - u16 fc; - u32 frame_type; - u32 frame_subtype; - u32 from_ds; - u32 to_ds; - int a4_exists; - int qc_exists; - u16 duration; - u16 seq_control; - u16 qos_control; - u8 TA[MAC_ADDR_LEN]; - u8 DA[MAC_ADDR_LEN]; - u8 SA[MAC_ADDR_LEN]; - u8 RC4Key[16]; - u32 p1k[5]; /*for mix_key; */ - unsigned long pnl; /* Least significant 16 bits of PN */ - unsigned long pnh; /* Most significant 32 bits of PN */ - u32 num_blocks; - u32 payload_remainder; - struct rt_arcfourcontext ArcFourContext; - u32 crc32 = 0; - u32 trailfcs = 0; - u8 MIC[8]; - u8 TrailMIC[8]; - - fc0 = *pData; - fc1 = *(pData + 1); - - fc = *((u16 *)pData); - - frame_type = ((fc0 >> 2) & 0x03); - frame_subtype = ((fc0 >> 4) & 0x0f); - - from_ds = (fc1 & 0x2) >> 1; - to_ds = (fc1 & 0x1); - - a4_exists = (from_ds & to_ds); - qc_exists = ((frame_subtype == 0x08) || /* Assumed QoS subtypes */ - (frame_subtype == 0x09) || /* Likely to change. */ - (frame_subtype == 0x0a) || (frame_subtype == 0x0b) - ); - - HeaderLen = 24; - if (a4_exists) - HeaderLen += 6; - - KeyID = *((u8 *)(pData + HeaderLen + 3)); - KeyID = KeyID >> 6; - - if (pWpaKey[KeyID].KeyLen == 0) { - DBGPRINT(RT_DEBUG_TRACE, - ("RTMPSoftDecryptTKIP failed!(KeyID[%d] Length can not be 0)\n", - KeyID)); - return FALSE; - } - - duration = *((u16 *)(pData + 2)); - - seq_control = *((u16 *)(pData + 22)); - - if (qc_exists) { - if (a4_exists) { - qos_control = *((u16 *)(pData + 30)); - } else { - qos_control = *((u16 *)(pData + 24)); - } - } - - if (to_ds == 0 && from_ds == 1) { - NdisMoveMemory(DA, pData + 4, MAC_ADDR_LEN); - NdisMoveMemory(SA, pData + 16, MAC_ADDR_LEN); - NdisMoveMemory(TA, pData + 10, MAC_ADDR_LEN); /*BSSID */ - } else if (to_ds == 0 && from_ds == 0) { - NdisMoveMemory(TA, pData + 10, MAC_ADDR_LEN); - NdisMoveMemory(DA, pData + 4, MAC_ADDR_LEN); - NdisMoveMemory(SA, pData + 10, MAC_ADDR_LEN); - } else if (to_ds == 1 && from_ds == 0) { - NdisMoveMemory(SA, pData + 10, MAC_ADDR_LEN); - NdisMoveMemory(TA, pData + 10, MAC_ADDR_LEN); - NdisMoveMemory(DA, pData + 16, MAC_ADDR_LEN); - } else if (to_ds == 1 && from_ds == 1) { - NdisMoveMemory(TA, pData + 10, MAC_ADDR_LEN); - NdisMoveMemory(DA, pData + 16, MAC_ADDR_LEN); - NdisMoveMemory(SA, pData + 22, MAC_ADDR_LEN); - } - - num_blocks = (DataByteCnt - 16) / 16; - payload_remainder = (DataByteCnt - 16) % 16; - - pnl = (*(pData + HeaderLen)) * 256 + *(pData + HeaderLen + 2); - pnh = *((unsigned long *)(pData + HeaderLen + 4)); - pnh = cpu2le32(pnh); - RTMPTkipMixKey(pWpaKey[KeyID].Key, TA, pnl, pnh, RC4Key, p1k); - - ARCFOUR_INIT(&ArcFourContext, RC4Key, 16); - - ARCFOUR_DECRYPT(&ArcFourContext, pData + HeaderLen, - pData + HeaderLen + 8, DataByteCnt - HeaderLen - 8); - NdisMoveMemory(&trailfcs, pData + DataByteCnt - 8 - 4, 4); - crc32 = RTMP_CALC_FCS32(PPPINITFCS32, pData + HeaderLen, DataByteCnt - HeaderLen - 8 - 4); /*Skip IV+EIV 8 bytes & Skip last 4 bytes(FCS). */ - crc32 ^= 0xffffffff; /* complement */ - - if (crc32 != cpu2le32(trailfcs)) { - DBGPRINT(RT_DEBUG_TRACE, ("RTMPSoftDecryptTKIP, WEP Data ICV Error !\n")); /*ICV error. */ - - return (FALSE); - } - - NdisMoveMemory(TrailMIC, pData + DataByteCnt - 8 - 8 - 4, 8); - RTMPInitMICEngine(pAd, pWpaKey[KeyID].Key, DA, SA, UserPriority, - pWpaKey[KeyID].RxMic); - RTMPTkipAppend(&pAd->PrivateInfo.Tx, pData + HeaderLen, - DataByteCnt - HeaderLen - 8 - 12); - RTMPTkipGetMIC(&pAd->PrivateInfo.Tx); - NdisMoveMemory(MIC, pAd->PrivateInfo.Tx.MIC, 8); - - if (!NdisEqualMemory(MIC, TrailMIC, 8)) { - DBGPRINT(RT_DEBUG_ERROR, ("RTMPSoftDecryptTKIP, WEP Data MIC Error !\n")); /*MIC error. */ - /*RTMPReportMicError(pAd, &pWpaKey[KeyID]); // marked by AlbertY @ 20060630 */ - return (FALSE); - } - /*DBGPRINT(RT_DEBUG_TRACE, "RTMPSoftDecryptTKIP Decript done!\n"); */ - return TRUE; -} |