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33#include "device.h"
34#include "80211hdr.h"
35
36
37
38
39
40u8 sbox_table[256] = {
41 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
42 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
43 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
44 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
45 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
46 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
47 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
48 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
49 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
50 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
51 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
52 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
53 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
54 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
55 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
56 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
57};
58
59u8 dot2_table[256] = {
60 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
61 0x20, 0x22, 0x24, 0x26, 0x28, 0x2a, 0x2c, 0x2e, 0x30, 0x32, 0x34, 0x36, 0x38, 0x3a, 0x3c, 0x3e,
62 0x40, 0x42, 0x44, 0x46, 0x48, 0x4a, 0x4c, 0x4e, 0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e,
63 0x60, 0x62, 0x64, 0x66, 0x68, 0x6a, 0x6c, 0x6e, 0x70, 0x72, 0x74, 0x76, 0x78, 0x7a, 0x7c, 0x7e,
64 0x80, 0x82, 0x84, 0x86, 0x88, 0x8a, 0x8c, 0x8e, 0x90, 0x92, 0x94, 0x96, 0x98, 0x9a, 0x9c, 0x9e,
65 0xa0, 0xa2, 0xa4, 0xa6, 0xa8, 0xaa, 0xac, 0xae, 0xb0, 0xb2, 0xb4, 0xb6, 0xb8, 0xba, 0xbc, 0xbe,
66 0xc0, 0xc2, 0xc4, 0xc6, 0xc8, 0xca, 0xcc, 0xce, 0xd0, 0xd2, 0xd4, 0xd6, 0xd8, 0xda, 0xdc, 0xde,
67 0xe0, 0xe2, 0xe4, 0xe6, 0xe8, 0xea, 0xec, 0xee, 0xf0, 0xf2, 0xf4, 0xf6, 0xf8, 0xfa, 0xfc, 0xfe,
68 0x1b, 0x19, 0x1f, 0x1d, 0x13, 0x11, 0x17, 0x15, 0x0b, 0x09, 0x0f, 0x0d, 0x03, 0x01, 0x07, 0x05,
69 0x3b, 0x39, 0x3f, 0x3d, 0x33, 0x31, 0x37, 0x35, 0x2b, 0x29, 0x2f, 0x2d, 0x23, 0x21, 0x27, 0x25,
70 0x5b, 0x59, 0x5f, 0x5d, 0x53, 0x51, 0x57, 0x55, 0x4b, 0x49, 0x4f, 0x4d, 0x43, 0x41, 0x47, 0x45,
71 0x7b, 0x79, 0x7f, 0x7d, 0x73, 0x71, 0x77, 0x75, 0x6b, 0x69, 0x6f, 0x6d, 0x63, 0x61, 0x67, 0x65,
72 0x9b, 0x99, 0x9f, 0x9d, 0x93, 0x91, 0x97, 0x95, 0x8b, 0x89, 0x8f, 0x8d, 0x83, 0x81, 0x87, 0x85,
73 0xbb, 0xb9, 0xbf, 0xbd, 0xb3, 0xb1, 0xb7, 0xb5, 0xab, 0xa9, 0xaf, 0xad, 0xa3, 0xa1, 0xa7, 0xa5,
74 0xdb, 0xd9, 0xdf, 0xdd, 0xd3, 0xd1, 0xd7, 0xd5, 0xcb, 0xc9, 0xcf, 0xcd, 0xc3, 0xc1, 0xc7, 0xc5,
75 0xfb, 0xf9, 0xff, 0xfd, 0xf3, 0xf1, 0xf7, 0xf5, 0xeb, 0xe9, 0xef, 0xed, 0xe3, 0xe1, 0xe7, 0xe5
76};
77
78u8 dot3_table[256] = {
79 0x00, 0x03, 0x06, 0x05, 0x0c, 0x0f, 0x0a, 0x09, 0x18, 0x1b, 0x1e, 0x1d, 0x14, 0x17, 0x12, 0x11,
80 0x30, 0x33, 0x36, 0x35, 0x3c, 0x3f, 0x3a, 0x39, 0x28, 0x2b, 0x2e, 0x2d, 0x24, 0x27, 0x22, 0x21,
81 0x60, 0x63, 0x66, 0x65, 0x6c, 0x6f, 0x6a, 0x69, 0x78, 0x7b, 0x7e, 0x7d, 0x74, 0x77, 0x72, 0x71,
82 0x50, 0x53, 0x56, 0x55, 0x5c, 0x5f, 0x5a, 0x59, 0x48, 0x4b, 0x4e, 0x4d, 0x44, 0x47, 0x42, 0x41,
83 0xc0, 0xc3, 0xc6, 0xc5, 0xcc, 0xcf, 0xca, 0xc9, 0xd8, 0xdb, 0xde, 0xdd, 0xd4, 0xd7, 0xd2, 0xd1,
84 0xf0, 0xf3, 0xf6, 0xf5, 0xfc, 0xff, 0xfa, 0xf9, 0xe8, 0xeb, 0xee, 0xed, 0xe4, 0xe7, 0xe2, 0xe1,
85 0xa0, 0xa3, 0xa6, 0xa5, 0xac, 0xaf, 0xaa, 0xa9, 0xb8, 0xbb, 0xbe, 0xbd, 0xb4, 0xb7, 0xb2, 0xb1,
86 0x90, 0x93, 0x96, 0x95, 0x9c, 0x9f, 0x9a, 0x99, 0x88, 0x8b, 0x8e, 0x8d, 0x84, 0x87, 0x82, 0x81,
87 0x9b, 0x98, 0x9d, 0x9e, 0x97, 0x94, 0x91, 0x92, 0x83, 0x80, 0x85, 0x86, 0x8f, 0x8c, 0x89, 0x8a,
88 0xab, 0xa8, 0xad, 0xae, 0xa7, 0xa4, 0xa1, 0xa2, 0xb3, 0xb0, 0xb5, 0xb6, 0xbf, 0xbc, 0xb9, 0xba,
89 0xfb, 0xf8, 0xfd, 0xfe, 0xf7, 0xf4, 0xf1, 0xf2, 0xe3, 0xe0, 0xe5, 0xe6, 0xef, 0xec, 0xe9, 0xea,
90 0xcb, 0xc8, 0xcd, 0xce, 0xc7, 0xc4, 0xc1, 0xc2, 0xd3, 0xd0, 0xd5, 0xd6, 0xdf, 0xdc, 0xd9, 0xda,
91 0x5b, 0x58, 0x5d, 0x5e, 0x57, 0x54, 0x51, 0x52, 0x43, 0x40, 0x45, 0x46, 0x4f, 0x4c, 0x49, 0x4a,
92 0x6b, 0x68, 0x6d, 0x6e, 0x67, 0x64, 0x61, 0x62, 0x73, 0x70, 0x75, 0x76, 0x7f, 0x7c, 0x79, 0x7a,
93 0x3b, 0x38, 0x3d, 0x3e, 0x37, 0x34, 0x31, 0x32, 0x23, 0x20, 0x25, 0x26, 0x2f, 0x2c, 0x29, 0x2a,
94 0x0b, 0x08, 0x0d, 0x0e, 0x07, 0x04, 0x01, 0x02, 0x13, 0x10, 0x15, 0x16, 0x1f, 0x1c, 0x19, 0x1a
95};
96
97static void xor_128(u8 *a, u8 *b, u8 *out)
98{
99 u32 * dwPtrA = (u32 *) a;
100 u32 * dwPtrB = (u32 *) b;
101 u32 * dwPtrOut = (u32 *) out;
102
103 (*dwPtrOut++) = (*dwPtrA++) ^ (*dwPtrB++);
104 (*dwPtrOut++) = (*dwPtrA++) ^ (*dwPtrB++);
105 (*dwPtrOut++) = (*dwPtrA++) ^ (*dwPtrB++);
106 (*dwPtrOut++) = (*dwPtrA++) ^ (*dwPtrB++);
107}
108
109static void xor_32(u8 *a, u8 *b, u8 *out)
110{
111 u32 * dwPtrA = (u32 *) a;
112 u32 * dwPtrB = (u32 *) b;
113 u32 * dwPtrOut = (u32 *) out;
114
115 (*dwPtrOut++) = (*dwPtrA++) ^ (*dwPtrB++);
116}
117
118void AddRoundKey(u8 *key, int round)
119{
120 u8 sbox_key[4];
121 u8 rcon_table[10] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36};
122
123 sbox_key[0] = sbox_table[key[13]];
124 sbox_key[1] = sbox_table[key[14]];
125 sbox_key[2] = sbox_table[key[15]];
126 sbox_key[3] = sbox_table[key[12]];
127
128 key[0] = key[0] ^ rcon_table[round];
129 xor_32(&key[0], sbox_key, &key[0]);
130
131 xor_32(&key[4], &key[0], &key[4]);
132 xor_32(&key[8], &key[4], &key[8]);
133 xor_32(&key[12], &key[8], &key[12]);
134}
135
136void SubBytes(u8 *in, u8 *out)
137{
138 int i;
139
140 for (i = 0; i < 16; i++)
141 out[i] = sbox_table[in[i]];
142}
143
144void ShiftRows(u8 *in, u8 *out)
145{
146 out[0] = in[0];
147 out[1] = in[5];
148 out[2] = in[10];
149 out[3] = in[15];
150 out[4] = in[4];
151 out[5] = in[9];
152 out[6] = in[14];
153 out[7] = in[3];
154 out[8] = in[8];
155 out[9] = in[13];
156 out[10] = in[2];
157 out[11] = in[7];
158 out[12] = in[12];
159 out[13] = in[1];
160 out[14] = in[6];
161 out[15] = in[11];
162}
163
164void MixColumns(u8 *in, u8 *out)
165{
166
167 out[0] = dot2_table[in[0]] ^ dot3_table[in[1]] ^ in[2] ^ in[3];
168 out[1] = in[0] ^ dot2_table[in[1]] ^ dot3_table[in[2]] ^ in[3];
169 out[2] = in[0] ^ in[1] ^ dot2_table[in[2]] ^ dot3_table[in[3]];
170 out[3] = dot3_table[in[0]] ^ in[1] ^ in[2] ^ dot2_table[in[3]];
171}
172
173void AESv128(u8 *key, u8 *data, u8 *ciphertext)
174{
175 int i;
176 int round;
177 u8 TmpdataA[16];
178 u8 TmpdataB[16];
179 u8 abyRoundKey[16];
180
181 for (i = 0; i < 16; i++)
182 abyRoundKey[i] = key[i];
183
184 for (round = 0; round < 11; round++) {
185 if (round == 0) {
186 xor_128(abyRoundKey, data, ciphertext);
187 AddRoundKey(abyRoundKey, round);
188 } else if (round == 10) {
189 SubBytes(ciphertext, TmpdataA);
190 ShiftRows(TmpdataA, TmpdataB);
191 xor_128(TmpdataB, abyRoundKey, ciphertext);
192 } else {
193 SubBytes(ciphertext, TmpdataA);
194 ShiftRows(TmpdataA, TmpdataB);
195 MixColumns(&TmpdataB[0], &TmpdataA[0]);
196 MixColumns(&TmpdataB[4], &TmpdataA[4]);
197 MixColumns(&TmpdataB[8], &TmpdataA[8]);
198 MixColumns(&TmpdataB[12], &TmpdataA[12]);
199 xor_128(TmpdataA, abyRoundKey, ciphertext);
200 AddRoundKey(abyRoundKey, round);
201 }
202 }
203
204}
205
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220
221bool AESbGenCCMP(u8 * pbyRxKey, u8 * pbyFrame, u16 wFrameSize)
222{
223 u8 abyNonce[13];
224 u8 MIC_IV[16];
225 u8 MIC_HDR1[16];
226 u8 MIC_HDR2[16];
227 u8 abyMIC[16];
228 u8 abyCTRPLD[16];
229 u8 abyTmp[16];
230 u8 abyPlainText[16];
231 u8 abyLastCipher[16];
232
233 struct ieee80211_hdr *pMACHeader = (struct ieee80211_hdr *) pbyFrame;
234 u8 * pbyIV;
235 u8 * pbyPayload;
236 u16 wHLen = 22;
237
238 u16 wPayloadSize = wFrameSize - 8 - 8 - 4 - WLAN_HDR_ADDR3_LEN;
239 bool bA4 = false;
240 u8 byTmp;
241 u16 wCnt;
242 int ii, jj, kk;
243
244 pbyIV = pbyFrame + WLAN_HDR_ADDR3_LEN;
245 if (WLAN_GET_FC_TODS(*(u16 *) pbyFrame) &&
246 WLAN_GET_FC_FROMDS(*(u16 *) pbyFrame)) {
247 bA4 = true;
248 pbyIV += 6;
249 wHLen += 6;
250 wPayloadSize -= 6;
251 }
252 pbyPayload = pbyIV + 8;
253
254 abyNonce[0] = 0x00;
255 memcpy(&(abyNonce[1]), pMACHeader->addr2, ETH_ALEN);
256 abyNonce[7] = pbyIV[7];
257 abyNonce[8] = pbyIV[6];
258 abyNonce[9] = pbyIV[5];
259 abyNonce[10] = pbyIV[4];
260 abyNonce[11] = pbyIV[1];
261 abyNonce[12] = pbyIV[0];
262
263
264 MIC_IV[0] = 0x59;
265 memcpy(&(MIC_IV[1]), &(abyNonce[0]), 13);
266 MIC_IV[14] = (u8)(wPayloadSize >> 8);
267 MIC_IV[15] = (u8)(wPayloadSize & 0xff);
268
269
270 MIC_HDR1[0] = (u8)(wHLen >> 8);
271 MIC_HDR1[1] = (u8)(wHLen & 0xff);
272 byTmp = (u8)(pMACHeader->frame_control & 0xff);
273 MIC_HDR1[2] = byTmp & 0x8f;
274 byTmp = (u8)(pMACHeader->frame_control >> 8);
275 byTmp &= 0x87;
276 MIC_HDR1[3] = byTmp | 0x40;
277 memcpy(&(MIC_HDR1[4]), pMACHeader->addr1, ETH_ALEN);
278 memcpy(&(MIC_HDR1[10]), pMACHeader->addr2, ETH_ALEN);
279
280
281 memcpy(&(MIC_HDR2[0]), pMACHeader->addr3, ETH_ALEN);
282 byTmp = (u8)(pMACHeader->seq_ctrl & 0xff);
283 MIC_HDR2[6] = byTmp & 0x0f;
284 MIC_HDR2[7] = 0;
285
286 if (bA4) {
287 memcpy(&(MIC_HDR2[8]), pMACHeader->addr4, ETH_ALEN);
288 } else {
289 MIC_HDR2[8] = 0x00;
290 MIC_HDR2[9] = 0x00;
291 MIC_HDR2[10] = 0x00;
292 MIC_HDR2[11] = 0x00;
293 MIC_HDR2[12] = 0x00;
294 MIC_HDR2[13] = 0x00;
295 }
296 MIC_HDR2[14] = 0x00;
297 MIC_HDR2[15] = 0x00;
298
299
300 AESv128(pbyRxKey, MIC_IV, abyMIC);
301 for (kk = 0; kk < 16; kk++)
302 abyTmp[kk] = MIC_HDR1[kk] ^ abyMIC[kk];
303
304 AESv128(pbyRxKey, abyTmp, abyMIC);
305 for (kk = 0; kk < 16; kk++)
306 abyTmp[kk] = MIC_HDR2[kk] ^ abyMIC[kk];
307
308 AESv128(pbyRxKey, abyTmp, abyMIC);
309
310 wCnt = 1;
311 abyCTRPLD[0] = 0x01;
312 memcpy(&(abyCTRPLD[1]), &(abyNonce[0]), 13);
313
314 for (jj = wPayloadSize; jj > 16; jj = jj-16) {
315
316 abyCTRPLD[14] = (u8) (wCnt >> 8);
317 abyCTRPLD[15] = (u8) (wCnt & 0xff);
318
319 AESv128(pbyRxKey, abyCTRPLD, abyTmp);
320
321 for (kk = 0; kk < 16; kk++)
322 abyPlainText[kk] = abyTmp[kk] ^ pbyPayload[kk];
323
324 for (kk = 0; kk < 16; kk++)
325 abyTmp[kk] = abyMIC[kk] ^ abyPlainText[kk];
326
327 AESv128(pbyRxKey, abyTmp, abyMIC);
328
329 memcpy(pbyPayload, abyPlainText, 16);
330 wCnt++;
331 pbyPayload += 16;
332 }
333
334
335 memcpy(&(abyLastCipher[0]), pbyPayload, jj);
336 for (ii = jj; ii < 16; ii++)
337 abyLastCipher[ii] = 0x00;
338
339 abyCTRPLD[14] = (u8) (wCnt >> 8);
340 abyCTRPLD[15] = (u8) (wCnt & 0xff);
341
342 AESv128(pbyRxKey, abyCTRPLD, abyTmp);
343 for (kk = 0; kk < 16; kk++)
344 abyPlainText[kk] = abyTmp[kk] ^ abyLastCipher[kk];
345
346 memcpy(pbyPayload, abyPlainText, jj);
347 pbyPayload += jj;
348
349
350 for (ii = jj; ii < 16; ii++)
351 abyPlainText[ii] = 0x00;
352 for (kk = 0; kk < 16; kk++)
353 abyTmp[kk] = abyMIC[kk] ^ abyPlainText[kk];
354
355 AESv128(pbyRxKey, abyTmp, abyMIC);
356
357
358
359 wCnt = 0;
360 abyCTRPLD[14] = (u8) (wCnt >> 8);
361 abyCTRPLD[15] = (u8) (wCnt & 0xff);
362 AESv128(pbyRxKey, abyCTRPLD, abyTmp);
363
364 for (kk = 0; kk < 8; kk++)
365 abyTmp[kk] = abyTmp[kk] ^ pbyPayload[kk];
366
367
368
369 if (!memcmp(abyMIC, abyTmp, 8))
370 return true;
371 else
372 return false;
373}
374
