--- /dev/null
+/******************************************************************************
+ * rtl871x_security.c
+ *
+ * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
+ * Linux device driver for RTL8192SU
+ *
+ * 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.
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ * Modifications for inclusion into the Linux staging tree are
+ * Copyright(c) 2010 Larry Finger. All rights reserved.
+ *
+ * Contact information:
+ * WLAN FAE <wlanfae@realtek.com>
+ * Larry Finger <Larry.Finger@lwfinger.net>
+ *
+ ******************************************************************************/
+
+#define _RTL871X_SECURITY_C_
+
+#include "osdep_service.h"
+#include "drv_types.h"
+#include "wifi.h"
+#include "osdep_intf.h"
+
+/* =====WEP related===== */
+
+#define CRC32_POLY 0x04c11db7
+
+struct arc4context {
+ u32 x;
+ u32 y;
+ u8 state[256];
+};
+
+static void arcfour_init(struct arc4context *parc4ctx, u8 * key, u32 key_len)
+{
+ u32 t, u;
+ u32 keyindex;
+ u32 stateindex;
+ u8 *state;
+ u32 counter;
+
+ state = parc4ctx->state;
+ parc4ctx->x = 0;
+ parc4ctx->y = 0;
+ for (counter = 0; counter < 256; counter++)
+ state[counter] = (u8)counter;
+ keyindex = 0;
+ stateindex = 0;
+ for (counter = 0; counter < 256; counter++) {
+ t = state[counter];
+ stateindex = (stateindex + key[keyindex] + t) & 0xff;
+ u = state[stateindex];
+ state[stateindex] = (u8)t;
+ state[counter] = (u8)u;
+ if (++keyindex >= key_len)
+ keyindex = 0;
+ }
+}
+
+static u32 arcfour_byte(struct arc4context *parc4ctx)
+{
+ u32 x;
+ u32 y;
+ u32 sx, sy;
+ u8 *state;
+
+ state = parc4ctx->state;
+ x = (parc4ctx->x + 1) & 0xff;
+ sx = state[x];
+ y = (sx + parc4ctx->y) & 0xff;
+ sy = state[y];
+ parc4ctx->x = x;
+ parc4ctx->y = y;
+ state[y] = (u8)sx;
+ state[x] = (u8)sy;
+ return state[(sx + sy) & 0xff];
+}
+
+static void arcfour_encrypt(struct arc4context *parc4ctx,
+ u8 *dest, u8 *src, u32 len)
+{
+ u32 i;
+
+ for (i = 0; i < len; i++)
+ dest[i] = src[i] ^ (unsigned char)arcfour_byte(parc4ctx);
+}
+
+static sint bcrc32initialized;
+static u32 crc32_table[256];
+
+static u8 crc32_reverseBit(u8 data)
+{
+ return ((u8)(data << 7) & 0x80) | ((data << 5) & 0x40) | ((data << 3)
+ & 0x20) | ((data << 1) & 0x10) | ((data >> 1) & 0x08) |
+ ((data >> 3) & 0x04) | ((data >> 5) & 0x02) | ((data >> 7) &
+ 0x01);
+}
+
+static void crc32_init(void)
+{
+ if (bcrc32initialized == 1)
+ return;
+ else {
+ sint i, j;
+ u32 c;
+ u8 *p = (u8 *)&c, *p1;
+ u8 k;
+
+ c = 0x12340000;
+ for (i = 0; i < 256; ++i) {
+ k = crc32_reverseBit((u8)i);
+ for (c = ((u32)k) << 24, j = 8; j > 0; --j)
+ c = c & 0x80000000 ? (c << 1) ^ CRC32_POLY :
+ (c << 1);
+ p1 = (u8 *)&crc32_table[i];
+ p1[0] = crc32_reverseBit(p[3]);
+ p1[1] = crc32_reverseBit(p[2]);
+ p1[2] = crc32_reverseBit(p[1]);
+ p1[3] = crc32_reverseBit(p[0]);
+ }
+ bcrc32initialized = 1;
+ }
+}
+
+static u32 getcrc32(u8 *buf, u32 len)
+{
+ u8 *p;
+ u32 crc;
+
+ if (bcrc32initialized == 0)
+ crc32_init();
+ crc = 0xffffffff; /* preload shift register, per CRC-32 spec */
+ for (p = buf; len > 0; ++p, --len)
+ crc = crc32_table[(crc ^ *p) & 0xff] ^ (crc >> 8);
+ return ~crc; /* transmit complement, per CRC-32 spec */
+}
+
+/*
+ Need to consider the fragment situation
+*/
+void r8712_wep_encrypt(struct _adapter *padapter, u8 *pxmitframe)
+{ /* exclude ICV */
+ unsigned char crc[4];
+ struct arc4context mycontext;
+ u32 curfragnum, length, keylength;
+ u8 *pframe, *payload, *iv; /*,*wepkey*/
+ u8 wepkey[16];
+ struct pkt_attrib *pattrib = &((struct xmit_frame *)
+ pxmitframe)->attrib;
+ struct security_priv *psecuritypriv = &padapter->securitypriv;
+ struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
+
+ if (((struct xmit_frame *)pxmitframe)->buf_addr == NULL)
+ return;
+ pframe = ((struct xmit_frame *)pxmitframe)->buf_addr+TXDESC_OFFSET;
+ /*start to encrypt each fragment*/
+ if ((pattrib->encrypt == _WEP40_) || (pattrib->encrypt == _WEP104_)) {
+ keylength = psecuritypriv->DefKeylen[psecuritypriv->
+ PrivacyKeyIndex];
+ for (curfragnum = 0; curfragnum < pattrib->nr_frags;
+ curfragnum++) {
+ iv = pframe+pattrib->hdrlen;
+ memcpy(&wepkey[0], iv, 3);
+ memcpy(&wepkey[3], &psecuritypriv->DefKey[
+ psecuritypriv->PrivacyKeyIndex].skey[0],
+ keylength);
+ payload = pframe+pattrib->iv_len+pattrib->hdrlen;
+ if ((curfragnum + 1) == pattrib->nr_frags) {
+ length = pattrib->last_txcmdsz-pattrib->
+ hdrlen-pattrib->iv_len -
+ pattrib->icv_len;
+ *((u32 *)crc) = cpu_to_le32(getcrc32(
+ payload, length));
+ arcfour_init(&mycontext, wepkey, 3 + keylength);
+ arcfour_encrypt(&mycontext, payload, payload,
+ length);
+ arcfour_encrypt(&mycontext, payload + length,
+ crc, 4);
+ } else {
+ length = pxmitpriv->frag_len-pattrib->hdrlen -
+ pattrib->iv_len-pattrib->icv_len;
+ *((u32 *)crc) = cpu_to_le32(getcrc32(
+ payload, length));
+ arcfour_init(&mycontext, wepkey, 3 + keylength);
+ arcfour_encrypt(&mycontext, payload, payload,
+ length);
+ arcfour_encrypt(&mycontext, payload+length,
+ crc, 4);
+ pframe += pxmitpriv->frag_len;
+ pframe = (u8 *)RND4((addr_t)(pframe));
+ }
+ }
+ }
+}
+
+void r8712_wep_decrypt(struct _adapter *padapter, u8 *precvframe)
+{
+ /* exclude ICV */
+ u8 crc[4];
+ struct arc4context mycontext;
+ u32 length, 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;
+
+ 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);
+ keylength = psecuritypriv->DefKeylen[keyindex];
+ memcpy(&wepkey[0], iv, 3);
+ memcpy(&wepkey[3], &psecuritypriv->DefKey[
+ psecuritypriv->PrivacyKeyIndex].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 */
+ arcfour_init(&mycontext, wepkey, 3 + keylength);
+ arcfour_encrypt(&mycontext, payload, payload, length);
+ /* calculate icv and compare the icv */
+ *((u32 *)crc) = cpu_to_le32(getcrc32(payload, length - 4));
+ }
+ return;
+}
+
+/* 3 =====TKIP related===== */
+
+static u32 secmicgetuint32(u8 *p)
+/* Convert from Byte[] to Us4Byte32 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 Us4Byte32 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 r8712_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);
+}
+
+static void secmicappendbyte(struct mic_data *pmicdata, u8 b)
+{
+ /* Append the byte to our word-sized buffer */
+ pmicdata->M |= ((u32)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 r8712_secmicappend(struct mic_data *pmicdata, u8 * src, u32 nbytes)
+{
+ /* This is simple */
+ while (nbytes > 0) {
+ secmicappendbyte(pmicdata, *src++);
+ nbytes--;
+ }
+}
+
+void r8712_secgetmic(struct mic_data *pmicdata, u8 *dst)
+{
+ /* Append the minimum padding */
+ secmicappendbyte(pmicdata, 0x5a);
+ secmicappendbyte(pmicdata, 0);
+ secmicappendbyte(pmicdata, 0);
+ secmicappendbyte(pmicdata, 0);
+ secmicappendbyte(pmicdata, 0);
+ /* and then zeroes until the length is a multiple of 4 */
+ while (pmicdata->nBytesInM != 0)
+ 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 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};
+
+ r8712_secmicsetkey(&micdata, key);
+ priority[0] = pri;
+ /* Michael MIC pseudo header: DA, SA, 3 x 0, Priority */
+ if (header[1] & 1) { /* ToDS==1 */
+ r8712_secmicappend(&micdata, &header[16], 6); /* DA */
+ if (header[1] & 2) /* From Ds==1 */
+ r8712_secmicappend(&micdata, &header[24], 6);
+ else
+ r8712_secmicappend(&micdata, &header[10], 6);
+ } else { /* ToDS==0 */
+ r8712_secmicappend(&micdata, &header[4], 6); /* DA */
+ if (header[1] & 2) /* From Ds==1 */
+ r8712_secmicappend(&micdata, &header[16], 6);
+ else
+ r8712_secmicappend(&micdata, &header[10], 6);
+ }
+ r8712_secmicappend(&micdata, &priority[0], 4);
+ r8712_secmicappend(&micdata, data, data_len);
+ r8712_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" */
+#define TA_SIZE 6 /* 48-bit transmitter address */
+#define TK_SIZE 16 /* 128-bit temporal key */
+#define P1K_SIZE 10 /* 80-bit Phase1 key */
+#define RC4_KEY_SIZE 16 /* 128-bit RC4KEY (104 bits unknown) */
+
+
+/* 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 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)
+{
+ sint 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 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)
+{
+ sint 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 r8712_tkip_encrypt(struct _adapter *padapter, u8 *pxmitframe)
+{ /* exclude ICV */
+ u16 pnl;
+ u32 pnh;
+ u8 rc4key[16];
+ u8 ttkey[16];
+ u8 crc[4];
+ struct arc4context mycontext;
+ u32 curfragnum, length, prwskeylen;
+
+ u8 *pframe, *payload, *iv, *prwskey;
+ union pn48 txpn;
+ struct sta_info *stainfo;
+ struct pkt_attrib *pattrib = &((struct xmit_frame *)pxmitframe)->attrib;
+ struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
+ u32 res = _SUCCESS;
+
+ if (((struct xmit_frame *)pxmitframe)->buf_addr == NULL)
+ return _FAIL;
+
+ pframe = ((struct xmit_frame *)pxmitframe)->buf_addr+TXDESC_OFFSET;
+ /* 4 start to encrypt each fragment */
+ if (pattrib->encrypt == _TKIP_) {
+ if (pattrib->psta)
+ stainfo = pattrib->psta;
+ else
+ stainfo = r8712_get_stainfo(&padapter->stapriv,
+ &pattrib->ra[0]);
+ if (stainfo != NULL) {
+ prwskey = &stainfo->x_UncstKey.skey[0];
+ prwskeylen = 16;
+ for (curfragnum = 0; curfragnum < pattrib->nr_frags;
+ curfragnum++) {
+ iv = pframe + pattrib->hdrlen;
+ payload = pframe+pattrib->iv_len +
+ pattrib->hdrlen;
+ GET_TKIP_PN(iv, txpn);
+ pnl = (u16)(txpn.val);
+ pnh = (u32)(txpn.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;
+ *((u32 *)crc) = cpu_to_le32(
+ getcrc32(payload, length));
+ arcfour_init(&mycontext, rc4key, 16);
+ arcfour_encrypt(&mycontext, payload,
+ payload, length);
+ arcfour_encrypt(&mycontext, payload +
+ length, crc, 4);
+ } else {
+ length = pxmitpriv->frag_len-pattrib->
+ hdrlen-pattrib->
+ iv_len-pattrib->icv_len;
+ *((u32 *)crc) = cpu_to_le32(getcrc32(
+ payload, length));
+ arcfour_init(&mycontext, rc4key, 16);
+ arcfour_encrypt(&mycontext, payload,
+ payload, length);
+ arcfour_encrypt(&mycontext,
+ payload+length, crc, 4);
+ pframe += pxmitpriv->frag_len;
+ pframe = (u8 *)RND4((addr_t)(pframe));
+ }
+ }
+ } else
+ res = _FAIL;
+ }
+ return res;
+}
+
+/* The hlen doesn't include the IV */
+u32 r8712_tkip_decrypt(struct _adapter *padapter, u8 *precvframe)
+{ /* exclude ICV */
+ u16 pnl;
+ u32 pnh;
+ u8 rc4key[16];
+ u8 ttkey[16];
+ u8 crc[4];
+ struct arc4context mycontext;
+ u32 length, prwskeylen;
+ u8 *pframe, *payload, *iv, *prwskey, idx = 0;
+ union pn48 txpn;
+ struct sta_info *stainfo;
+ struct rx_pkt_attrib *prxattrib = &((union recv_frame *)
+ precvframe)->u.hdr.attrib;
+ struct security_priv *psecuritypriv = &padapter->securitypriv;
+
+ pframe = (unsigned char *)((union recv_frame *)
+ precvframe)->u.hdr.rx_data;
+ /* 4 start to decrypt recvframe */
+ if (prxattrib->encrypt == _TKIP_) {
+ stainfo = r8712_get_stainfo(&padapter->stapriv,
+ &prxattrib->ta[0]);
+ if (stainfo != NULL) {
+ iv = pframe+prxattrib->hdrlen;
+ payload = pframe+prxattrib->iv_len + prxattrib->hdrlen;
+ length = ((union recv_frame *)precvframe)->
+ u.hdr.len - prxattrib->hdrlen -
+ prxattrib->iv_len;
+ if (IS_MCAST(prxattrib->ra)) {
+ idx = iv[3];
+ prwskey = &psecuritypriv->XGrpKey[
+ ((idx >> 6) & 0x3) - 1].skey[0];
+ if (psecuritypriv->binstallGrpkey == false)
+ return _FAIL;
+ } else
+ prwskey = &stainfo->x_UncstKey.skey[0];
+ prwskeylen = 16;
+ GET_TKIP_PN(iv, txpn);
+ pnl = (u16)(txpn.val);
+ pnh = (u32)(txpn.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 */
+ arcfour_init(&mycontext, rc4key, 16);
+ arcfour_encrypt(&mycontext, payload, payload, length);
+ *((u32 *)crc) = cpu_to_le32(getcrc32(payload,
+ length - 4));
+ if (crc[3] != payload[length - 1] ||
+ crc[2] != payload[length - 2] ||
+ crc[1] != payload[length - 3] ||
+ crc[0] != payload[length - 4])
+ return _FAIL;
+ } else
+ return _FAIL;
+ }
+ return _SUCCESS;
+}
+
+/* 3 =====AES related===== */
+
+#define MAX_MSG_SIZE 2048
+/*****************************/
+/******** SBOX Table *********/
+/*****************************/
+
+static const u8 sbox_table[256] = {
+ 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5,
+ 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
+ 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0,
+ 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
+ 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc,
+ 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
+ 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a,
+ 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
+ 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0,
+ 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
+ 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b,
+ 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
+ 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85,
+ 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
+ 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5,
+ 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
+ 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17,
+ 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
+ 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88,
+ 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
+ 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c,
+ 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
+ 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9,
+ 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
+ 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6,
+ 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
+ 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e,
+ 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
+ 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94,
+ 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
+ 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68,
+ 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
+};
+
+/****************************************/
+/* aes128k128d() */
+/* Performs a 128 bit AES encrypt with */
+/* 128 bit data. */
+/****************************************/
+static void xor_128(u8 *a, u8 *b, u8 *out)
+{
+ sint i;
+
+ for (i = 0; i < 16; i++)
+ out[i] = a[i] ^ b[i];
+}
+
+static void xor_32(u8 *a, u8 *b, u8 *out)
+{
+ sint i;
+ for (i = 0; i < 4; i++)
+ out[i] = a[i] ^ b[i];
+}
+
+static u8 sbox(u8 a)
+{
+ return sbox_table[(sint)a];
+}
+
+static void next_key(u8 *key, sint round)
+{
+ u8 rcon;
+ u8 sbox_key[4];
+ u8 rcon_table[12] = {
+ 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80,
+ 0x1b, 0x36, 0x36, 0x36
+ };
+
+ sbox_key[0] = sbox(key[13]);
+ sbox_key[1] = sbox(key[14]);
+ sbox_key[2] = sbox(key[15]);
+ sbox_key[3] = sbox(key[12]);
+ rcon = rcon_table[round];
+ xor_32(&key[0], sbox_key, &key[0]);
+ key[0] = key[0] ^ rcon;
+ xor_32(&key[4], &key[0], &key[4]);
+ xor_32(&key[8], &key[4], &key[8]);
+ xor_32(&key[12], &key[8], &key[12]);
+}
+
+static void byte_sub(u8 *in, u8 *out)
+{
+ sint i;
+ for (i = 0; i < 16; i++)
+ out[i] = sbox(in[i]);
+}
+
+static void shift_row(u8 *in, u8 *out)
+{
+ out[0] = in[0];
+ out[1] = in[5];
+ out[2] = in[10];
+ out[3] = in[15];
+ out[4] = in[4];
+ out[5] = in[9];
+ out[6] = in[14];
+ out[7] = in[3];
+ out[8] = in[8];
+ out[9] = in[13];
+ out[10] = in[2];
+ out[11] = in[7];
+ out[12] = in[12];
+ out[13] = in[1];
+ out[14] = in[6];
+ out[15] = in[11];
+}
+
+static void mix_column(u8 *in, u8 *out)
+{
+ sint i;
+ u8 add1b[4];
+ u8 add1bf7[4];
+ u8 rotl[4];
+ u8 swap_halfs[4];
+ u8 andf7[4];
+ u8 rotr[4];
+ u8 temp[4];
+ u8 tempb[4];
+
+ for (i = 0 ; i < 4; i++) {
+ if ((in[i] & 0x80) == 0x80)
+ add1b[i] = 0x1b;
+ else
+ add1b[i] = 0x00;
+ }
+ swap_halfs[0] = in[2]; /* Swap halves */
+ swap_halfs[1] = in[3];
+ swap_halfs[2] = in[0];
+ swap_halfs[3] = in[1];
+ rotl[0] = in[3]; /* Rotate left 8 bits */
+ rotl[1] = in[0];
+ rotl[2] = in[1];
+ rotl[3] = in[2];
+ andf7[0] = in[0] & 0x7f;
+ andf7[1] = in[1] & 0x7f;
+ andf7[2] = in[2] & 0x7f;
+ andf7[3] = in[3] & 0x7f;
+ for (i = 3; i > 0; i--) { /* logical shift left 1 bit */
+ andf7[i] = andf7[i] << 1;
+ if ((andf7[i-1] & 0x80) == 0x80)
+ andf7[i] = (andf7[i] | 0x01);
+ }
+ andf7[0] = andf7[0] << 1;
+ andf7[0] = andf7[0] & 0xfe;
+ xor_32(add1b, andf7, add1bf7);
+ xor_32(in, add1bf7, rotr);
+ temp[0] = rotr[0]; /* Rotate right 8 bits */
+ rotr[0] = rotr[1];
+ rotr[1] = rotr[2];
+ rotr[2] = rotr[3];
+ rotr[3] = temp[0];
+ xor_32(add1bf7, rotr, temp);
+ xor_32(swap_halfs, rotl, tempb);
+ xor_32(temp, tempb, out);
+}
+
+static void aes128k128d(u8 *key, u8 *data, u8 *ciphertext)
+{
+ sint round;
+ sint i;
+ u8 intermediatea[16];
+ u8 intermediateb[16];
+ u8 round_key[16];
+
+ for (i = 0; i < 16; i++)
+ round_key[i] = key[i];
+ for (round = 0; round < 11; round++) {
+ if (round == 0) {
+ xor_128(round_key, data, ciphertext);
+ next_key(round_key, round);
+ } else if (round == 10) {
+ byte_sub(ciphertext, intermediatea);
+ shift_row(intermediatea, intermediateb);
+ xor_128(intermediateb, round_key, ciphertext);
+ } else { /* 1 - 9 */
+ byte_sub(ciphertext, intermediatea);
+ shift_row(intermediatea, intermediateb);
+ mix_column(&intermediateb[0], &intermediatea[0]);
+ mix_column(&intermediateb[4], &intermediatea[4]);
+ mix_column(&intermediateb[8], &intermediatea[8]);
+ mix_column(&intermediateb[12], &intermediatea[12]);
+ xor_128(intermediatea, round_key, ciphertext);
+ next_key(round_key, round);
+ }
+ }
+}
+
+/************************************************/
+/* construct_mic_iv() */
+/* Builds the MIC IV from header fields and PN */
+/************************************************/
+static void construct_mic_iv(u8 *mic_iv, sint qc_exists, sint a4_exists,
+ u8 *mpdu, uint payload_length, u8 *pn_vector)
+{
+ sint 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;
+ for (i = 2; i < 8; i++)
+ mic_iv[i] = mpdu[i + 8];
+ for (i = 8; i < 14; i++)
+ mic_iv[i] = pn_vector[13 - i]; /* mic_iv[8:13] = PN[5:0] */
+ 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. */
+/************************************************/
+static void construct_mic_header1(u8 *mic_header1, sint header_length, u8 *mpdu)
+{
+ mic_header1[0] = (u8)((header_length - 2) / 256);
+ mic_header1[1] = (u8)((header_length - 2) % 256);
+ mic_header1[2] = mpdu[0] & 0xcf; /* Mute CF poll & CF ack bits */
+ /* Mute retry, more data and pwr mgt bits */
+ mic_header1[3] = mpdu[1] & 0xc7;
+ 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, sint a4_exists,
+ sint qc_exists)
+{
+ sint 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. */
+/************************************************/
+static void construct_ctr_preload(u8 *ctr_preload, sint a4_exists, sint qc_exists,
+ u8 *mpdu, u8 *pn_vector, sint c)
+{
+ sint i;
+
+ 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;
+ if (qc_exists && !a4_exists)
+ ctr_preload[1] = mpdu[24] & 0x0f;
+ for (i = 2; i < 8; i++)
+ ctr_preload[i] = mpdu[i + 8];
+ for (i = 8; i < 14; i++)
+ ctr_preload[i] = pn_vector[13 - i];
+ 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)
+{
+ sint i;
+
+ for (i = 0; i < 16; i++)
+ out[i] = ina[i] ^ inb[i];
+}
+
+static sint aes_cipher(u8 *key, uint hdrlen,
+ u8 *pframe, uint plen)
+{
+ uint qc_exists, a4_exists, i, j, payload_remainder;
+ uint 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 == WIFI_DATA_CFACK) ||
+ (frtype == WIFI_DATA_CFPOLL) ||
+ (frtype == WIFI_DATA_CFACKPOLL)) {
+ qc_exists = 1;
+ if (hdrlen != WLAN_HDR_A3_QOS_LEN)
+ hdrlen += 2;
+ } else if ((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, plen, pn_vector);
+ construct_mic_header1(mic_header1, hdrlen, pframe);
+ construct_mic_header2(mic_header2, pframe, 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, pn_vector, i + 1);
+ 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 short final block, then pad it,*/
+ /* encrypt and copy unpadded part back */
+ construct_ctr_preload(ctr_preload, a4_exists, qc_exists,
+ pframe, pn_vector, num_blocks+1);
+ 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, pn_vector, 0);
+ 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 r8712_aes_encrypt(struct _adapter *padapter, u8 *pxmitframe)
+{ /* exclude ICV */
+ /* Intermediate Buffers */
+ sint curfragnum, length;
+ u32 prwskeylen;
+ u8 *pframe, *prwskey;
+ struct sta_info *stainfo;
+ struct pkt_attrib *pattrib = &((struct xmit_frame *)
+ pxmitframe)->attrib;
+ struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
+ u32 res = _SUCCESS;
+
+ if (((struct xmit_frame *)pxmitframe)->buf_addr == NULL)
+ return _FAIL;
+ pframe = ((struct xmit_frame *)pxmitframe)->buf_addr + TXDESC_OFFSET;
+ /* 4 start to encrypt each fragment */
+ if ((pattrib->encrypt == _AES_)) {
+ if (pattrib->psta)
+ stainfo = pattrib->psta;
+ else
+ stainfo = r8712_get_stainfo(&padapter->stapriv,
+ &pattrib->ra[0]);
+ if (stainfo != NULL) {
+ prwskey = &stainfo->x_UncstKey.skey[0];
+ prwskeylen = 16;
+ for (curfragnum = 0; curfragnum < pattrib->nr_frags;
+ curfragnum++) {
+ if ((curfragnum + 1) == pattrib->nr_frags) {\
+ 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 *)RND4((addr_t)(pframe));
+ }
+ }
+ } else
+ res = _FAIL;
+ }
+ return res;
+}
+
+static sint 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;
+ uint 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);
+ /* start to decrypt the payload */
+ /*(plen including llc, payload and mic) */
+ num_blocks = (plen - 8) / 16;
+ 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 == WIFI_DATA_CFACK) ||
+ (frtype == WIFI_DATA_CFPOLL) ||
+ (frtype == WIFI_DATA_CFACKPOLL)) {
+ qc_exists = 1;
+ if (hdrlen != WLAN_HDR_A3_QOS_LEN)
+ hdrlen += 2;
+ } else if ((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);
+ 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 short final block, 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);
+ 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 */
+ memcpy((void *)message, pframe, (hdrlen + plen + 8));
+ 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);
+ construct_mic_header1(mic_header1, hdrlen, message);
+ 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);
+ 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 short final block, pad it,*/
+ /* encrypt and copy unpadded part back */
+ construct_ctr_preload(ctr_preload, a4_exists, qc_exists,
+ message, pn_vector, num_blocks+1);
+ 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);
+ for (j = 0; j < 16; j++)
+ padded_buffer[j] = 0x00;
+ for (j = 0; j < 8; j++)
+ padded_buffer[j] = message[j + hdrlen + plen];
+ 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 */
+ return _SUCCESS;
+}
+
+u32 r8712_aes_decrypt(struct _adapter *padapter, u8 *precvframe)
+{ /* exclude ICV */
+ /* Intermediate Buffers */
+ sint length;
+ u32 prwskeylen;
+ u8 *pframe, *prwskey, *iv, idx;
+ struct sta_info *stainfo;
+ struct rx_pkt_attrib *prxattrib = &((union recv_frame *)
+ precvframe)->u.hdr.attrib;
+ struct security_priv *psecuritypriv = &padapter->securitypriv;
+
+ pframe = (unsigned char *)((union recv_frame*)precvframe)->
+ u.hdr.rx_data;
+ /* 4 start to encrypt each fragment */
+ if ((prxattrib->encrypt == _AES_)) {
+ stainfo = r8712_get_stainfo(&padapter->stapriv,
+ &prxattrib->ta[0]);
+ if (stainfo != NULL) {
+ if (IS_MCAST(prxattrib->ra)) {
+ iv = pframe+prxattrib->hdrlen;
+ idx = iv[3];
+ prwskey = &psecuritypriv->XGrpKey[
+ ((idx >> 6) & 0x3) - 1].skey[0];
+ if (psecuritypriv->binstallGrpkey == false)
+ return _FAIL;
+
+ } else
+ prwskey = &stainfo->x_UncstKey.skey[0];
+ prwskeylen = 16;
+ length = ((union recv_frame *)precvframe)->
+ u.hdr.len-prxattrib->hdrlen-prxattrib->iv_len;
+ aes_decipher(prwskey, prxattrib->hdrlen, pframe,
+ length);
+ } else
+ return _FAIL;
+ }
+ return _SUCCESS;
+}
+
+void r8712_use_tkipkey_handler(void *FunctionContext)
+{
+ struct _adapter *padapter = (struct _adapter *)FunctionContext;
+
+ padapter->securitypriv.busetkipkey = true;
+}
projects / mv-sheeva.git / blobdiff