diff options
Diffstat (limited to 'drivers/staging/rt3090/common/cmm_tkip.c')
| -rw-r--r-- | drivers/staging/rt3090/common/cmm_tkip.c | 966 |
1 files changed, 966 insertions, 0 deletions
diff --git a/drivers/staging/rt3090/common/cmm_tkip.c b/drivers/staging/rt3090/common/cmm_tkip.c new file mode 100644 index 000000000000..0b474f20859b --- /dev/null +++ b/drivers/staging/rt3090/common/cmm_tkip.c @@ -0,0 +1,966 @@ +/* + ************************************************************************* + * 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) ) + +UINT 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 +}; + +UINT 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. +// +typedef struct PACKED _IV_CONTROL_ +{ + union PACKED + { + struct PACKED + { + UCHAR rc0; + UCHAR rc1; + UCHAR rc2; + + union PACKED + { + struct PACKED + { +#ifdef RT_BIG_ENDIAN + UCHAR KeyID:2; + UCHAR ExtIV:1; + UCHAR Rsvd:5; +#else + UCHAR Rsvd:5; + UCHAR ExtIV:1; + UCHAR KeyID:2; +#endif + } field; + UCHAR Byte; + } CONTROL; + } field; + + ULONG word; + } IV16; + + ULONG IV32; +} TKIP_IV, *PTKIP_IV; + + +/* + ======================================================================== + + Routine Description: + Convert from UCHAR[] to ULONG in a portable way + + Arguments: + pMICKey pointer to MIC Key + + Return Value: + None + + Note: + + ======================================================================== +*/ +ULONG RTMPTkipGetUInt32( + IN PUCHAR pMICKey) +{ + ULONG res = 0; + INT i; + + for (i = 0; i < 4; i++) + { + res |= (*pMICKey++) << (8 * i); + } + + return res; +} + +/* + ======================================================================== + + Routine Description: + Convert from ULONG to UCHAR[] in a portable way + + Arguments: + pDst pointer to destination for convert ULONG to UCHAR[] + val the value for convert + + Return Value: + None + + IRQL = DISPATCH_LEVEL + + Note: + + ======================================================================== +*/ +VOID RTMPTkipPutUInt32( + IN OUT PUCHAR pDst, + IN ULONG val) +{ + INT i; + + for(i = 0; i < 4; i++) + { + *pDst++ = (UCHAR) (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( + IN PTKIP_KEY_INFO pTkip, + IN PUCHAR 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( + IN PTKIP_KEY_INFO pTkip, + IN UCHAR 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( + IN PTKIP_KEY_INFO pTkip, + IN PUCHAR pSrc, + IN UINT 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( + IN PTKIP_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( + IN PRTMP_ADAPTER pAd, + IN PUCHAR pKey, + IN UCHAR KeyId, + IN PUCHAR pTA, + IN PUCHAR pMICKey, + IN PUCHAR pTSC, + OUT PULONG pIV16, + OUT PULONG pIV32) +{ + TKIP_IV tkipIv; + + // Prepare 8 bytes TKIP encapsulation for MPDU + NdisZeroMemory(&tkipIv, sizeof(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 = *(PULONG)(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( + IN PRTMP_ADAPTER pAd, + IN PUCHAR pKey, + IN PUCHAR pDA, + IN PUCHAR pSA, + IN UCHAR UserPriority, + IN PUCHAR pMICKey) +{ + ULONG 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, (PUCHAR)&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( + IN PRTMP_ADAPTER pAd, + IN PUCHAR pSrc, + IN PUCHAR pDA, + IN PUCHAR pSA, + IN PUCHAR pMICKey, + IN UCHAR UserPriority, + IN UINT Len) +{ + UCHAR OldMic[8]; + ULONG 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, (PUCHAR)&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: + Compare MIC value of received MSDU + + Arguments: + pAd Pointer to our adapter + pLLC LLC header + 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 RTMPTkipCompareMICValueWithLLC( + IN PRTMP_ADAPTER pAd, + IN PUCHAR pLLC, + IN PUCHAR pSrc, + IN PUCHAR pDA, + IN PUCHAR pSA, + IN PUCHAR pMICKey, + IN UINT Len) +{ + UCHAR OldMic[8]; + ULONG Priority = 0; + + // 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, (PUCHAR)&Priority, 4); + + // Start with LLC header + RTMPTkipAppend(&pAd->PrivateInfo.Rx, pLLC, 8); + + // 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, ("RTMPTkipCompareMICValueWithLLC(): 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 + PNDIS_PACKET 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( + IN PRTMP_ADAPTER pAd, + IN PNDIS_PACKET pPacket, + IN PUCHAR pEncap, + IN PCIPHER_KEY pKey, + IN UCHAR apidx) +{ + PACKET_INFO PacketInfo; + PUCHAR pSrcBufVA; + UINT SrcBufLen; + PUCHAR pSrc; + UCHAR UserPriority; + UCHAR 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; + +#ifdef CONFIG_STA_SUPPORT +#endif // CONFIG_STA_SUPPORT // + { + 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. */ +/************************************************************/ + +UINT tkip_sbox(UINT index) +{ + UINT index_low; + UINT index_high; + UINT 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); +} + +UINT rotr1(UINT a) +{ + unsigned int b; + + if ((a & 0x01) == 0x01) + { + b = (a >> 1) | 0x8000; + } + else + { + b = (a >> 1) & 0x7fff; + } + b = b % 65536; + return b; +} + +VOID RTMPTkipMixKey( + UCHAR *key, + UCHAR *ta, + ULONG pnl, /* Least significant 16 bits of PN */ + ULONG pnh, /* Most significant 32 bits of PN */ + UCHAR *rc4key, + UINT *p1k) +{ + + UINT tsc0; + UINT tsc1; + UINT tsc2; + + UINT ppk0; + UINT ppk1; + UINT ppk2; + UINT ppk3; + UINT ppk4; + UINT 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] = (UINT)(ta[0] + (ta[1]*256)); + p1k[3] = (UINT)(ta[2] + (ta[3]*256)); + p1k[4] = (UINT)(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( + IN PRTMP_ADAPTER pAd, + IN PUCHAR pData, + IN ULONG DataByteCnt, + IN UCHAR UserPriority, + IN PCIPHER_KEY pWpaKey) +{ + UCHAR KeyID; + UINT HeaderLen; + UCHAR fc0; + UCHAR fc1; + USHORT fc; + UINT frame_type; + UINT frame_subtype; + UINT from_ds; + UINT to_ds; + INT a4_exists; + INT qc_exists; + USHORT duration; + USHORT seq_control; + USHORT qos_control; + UCHAR TA[MAC_ADDR_LEN]; + UCHAR DA[MAC_ADDR_LEN]; + UCHAR SA[MAC_ADDR_LEN]; + UCHAR RC4Key[16]; + UINT p1k[5]; //for mix_key; + ULONG pnl;/* Least significant 16 bits of PN */ + ULONG pnh;/* Most significant 32 bits of PN */ + UINT num_blocks; + UINT payload_remainder; + ARCFOURCONTEXT ArcFourContext; + UINT crc32 = 0; + UINT trailfcs = 0; + UCHAR MIC[8]; + UCHAR TrailMIC[8]; + +#ifdef RT_BIG_ENDIAN + RTMPFrameEndianChange(pAd, (PUCHAR)pData, DIR_READ, FALSE); +#endif + + fc0 = *pData; + fc1 = *(pData + 1); + + fc = *((PUSHORT)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 = *((PUCHAR)(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 = *((PUSHORT)(pData+2)); + + seq_control = *((PUSHORT)(pData+22)); + + if (qc_exists) + { + if (a4_exists) + { + qos_control = *((PUSHORT)(pData+30)); + } + else + { + qos_control = *((PUSHORT)(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 = *((PULONG)(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); + } + +#ifdef RT_BIG_ENDIAN + RTMPFrameEndianChange(pAd, (PUCHAR)pData, DIR_READ, FALSE); +#endif + //DBGPRINT(RT_DEBUG_TRACE, "RTMPSoftDecryptTKIP Decript done!!\n"); + return TRUE; +} |