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MOXA linux-2.6.x / linux-2.6.9-uc0 from sdlinux-moxaart.tgz
[linux-2.6.9-moxart.git] / drivers / net / wireless / rtlink / Module / md5.c
blob75d58fcffdd3af3aab7f1a355906749d0ad80e5e
1 /*
2 ***************************************************************************
3 * Ralink Tech Inc.
4 * 4F, No. 2 Technology 5th Rd.
5 * Science-based Industrial Park
6 * Hsin-chu, Taiwan, R.O.C.
7 *
8 * (c) Copyright 2002-2004, Ralink Technology, Inc.
9 *
10 * All rights reserved. Ralink's source code is an unpublished work and the
11 * use of a copyright notice does not imply otherwise. This source code
12 * contains confidential trade secret material of Ralink Tech. Any attemp
13 * or participation in deciphering, decoding, reverse engineering or in any
14 * way altering the source code is stricitly prohibited, unless the prior
15 * written consent of Ralink Technology, Inc. is obtained.
16 ***************************************************************************
17
18 Module Name:
19 md5.c
20
21 Abstract:
22
23 Revision History:
24 Who When What
25 -------- ---------- ----------------------------------------------
26 jan 10-28-03 Initial
27 Rita 11-23-04 Modify MD5 and SHA-1
28 Rita 10-14-05 Modify SHA-1 in big-endian platform
29 */
30 #include "rt_config.h"
31
32 /**
33 * md5_mac:
34 * @key: pointer to the key used for MAC generation
35 * @key_len: length of the key in bytes
36 * @data: pointer to the data area for which the MAC is generated
37 * @data_len: length of the data in bytes
38 * @mac: pointer to the buffer holding space for the MAC; the buffer should
39 * have space for 128-bit (16 bytes) MD5 hash value
40 *
41 * md5_mac() determines the message authentication code by using secure hash
42 * MD5(key | data | key).
43 */
44 void md5_mac(UCHAR *key, ULONG key_len, UCHAR *data, ULONG data_len, UCHAR *mac)
45 {
46 MD5_CTX context;
47
48 MD5Init(&context);
49 MD5Update(&context, key, key_len);
50 MD5Update(&context, data, data_len);
51 MD5Update(&context, key, key_len);
52 MD5Final(mac, &context);
53 }
54
55
56 /**
57 * hmac_md5:
58 * @key: pointer to the key used for MAC generation
59 * @key_len: length of the key in bytes
60 * @data: pointer to the data area for which the MAC is generated
61 * @data_len: length of the data in bytes
62 * @mac: pointer to the buffer holding space for the MAC; the buffer should
63 * have space for 128-bit (16 bytes) MD5 hash value
64 *
65 * hmac_md5() determines the message authentication code using HMAC-MD5.
66 * This implementation is based on the sample code presented in RFC 2104.
67 */
68 void hmac_md5(UCHAR *key, ULONG key_len, UCHAR *data, ULONG data_len, UCHAR *mac)
69 {
70 MD5_CTX context;
71 UCHAR k_ipad[65]; /* inner padding - key XORd with ipad */
72 UCHAR k_opad[65]; /* outer padding - key XORd with opad */
73 UCHAR tk[16];
74 int i;
75
76 //assert(key != NULL && data != NULL && mac != NULL);
77
78 /* if key is longer than 64 bytes reset it to key = MD5(key) */
79 if (key_len > 64) {
80 MD5_CTX ttcontext;
81
82 MD5Init(&ttcontext);
83 MD5Update(&ttcontext, key, key_len);
84 MD5Final(tk, &ttcontext);
85 //key=(PUCHAR)ttcontext.buf;
86 key = tk;
87 key_len = 16;
88 }
89
90 /* the HMAC_MD5 transform looks like:
91 *
92 * MD5(K XOR opad, MD5(K XOR ipad, text))
93 *
94 * where K is an n byte key
95 * ipad is the byte 0x36 repeated 64 times
96 * opad is the byte 0x5c repeated 64 times
97 * and text is the data being protected */
98
99 /* start out by storing key in pads */
100 NdisZeroMemory(k_ipad, sizeof(k_ipad));
101 NdisZeroMemory(k_opad, sizeof(k_opad));
102 //assert(key_len < sizeof(k_ipad));
103 NdisMoveMemory(k_ipad, key, key_len);
104 NdisMoveMemory(k_opad, key, key_len);
105
106 /* XOR key with ipad and opad values */
107 for (i = 0; i < 64; i++) {
108 k_ipad[i] ^= 0x36;
109 k_opad[i] ^= 0x5c;
110 }
111
112 /* perform inner MD5 */
113 MD5Init(&context); /* init context for 1st pass */
114 MD5Update(&context, k_ipad, 64); /* start with inner pad */
115 MD5Update(&context, data, data_len); /* then text of datagram */
116 MD5Final(mac, &context); /* finish up 1st pass */
117
118 /* perform outer MD5 */
119 MD5Init(&context); /* init context for 2nd pass */
120 MD5Update(&context, k_opad, 64); /* start with outer pad */
121 MD5Update(&context, mac, 16); /* then results of 1st hash */
122 MD5Final(mac, &context); /* finish up 2nd pass */
123 }
124
125 #ifndef BIG_ENDIAN
126 #define byteReverse(buf, len) /* Nothing */
127 #else
128 void byteReverse(unsigned char *buf, unsigned longs);
129 void byteReverse(unsigned char *buf, unsigned longs)
130 {
131 do {
132 *(ULONG *)buf = SWAP32(*(ULONG *)buf);
133 buf += 4;
134 } while (--longs);
135 }
136 #endif
137
138
139 /* ========================== MD5 implementation =========================== */
140 // four base functions for MD5
141 #define MD5_F1(x, y, z) (((x) & (y)) | ((~x) & (z)))
142 #define MD5_F2(x, y, z) (((x) & (z)) | ((y) & (~z)))
143 #define MD5_F3(x, y, z) ((x) ^ (y) ^ (z))
144 #define MD5_F4(x, y, z) ((y) ^ ((x) | (~z)))
145 #define CYCLIC_LEFT_SHIFT(w, s) (((w) << (s)) | ((w) >> (32-(s))))
146
147 #define MD5Step(f, w, x, y, z, data, t, s) \
148 ( w += f(x, y, z) + data + t, w = (CYCLIC_LEFT_SHIFT(w, s)) & 0xffffffff, w += x )
149
150
151 /*
152 * Function Description:
153 * Initiate MD5 Context satisfied in RFC 1321
154 *
155 * Arguments:
156 * pCtx Pointer to MD5 context
157 *
158 * Return Value:
159 * None
160 */
161 VOID MD5Init(MD5_CTX *pCtx)
162 {
163 pCtx->Buf[0]=0x67452301;
164 pCtx->Buf[1]=0xefcdab89;
165 pCtx->Buf[2]=0x98badcfe;
166 pCtx->Buf[3]=0x10325476;
167
168 pCtx->LenInBitCount[0]=0;
169 pCtx->LenInBitCount[1]=0;
170 }
171
172
173 /*
174 * Function Description:
175 * Update MD5 Context, allow of an arrary of octets as the next portion
176 * of the message
177 *
178 * Arguments:
179 * pCtx Pointer to MD5 context
180 * pData Pointer to input data
181 * LenInBytes The length of input data (unit: byte)
182 *
183 * Return Value:
184 * None
185 *
186 * Note:
187 * Called after MD5Init or MD5Update(itself)
188 */
189 VOID MD5Update(MD5_CTX *pCtx, UCHAR *pData, ULONG LenInBytes)
190 {
191
192 ULONG TfTimes;
193 ULONG temp;
194 unsigned int i;
195
196 temp = pCtx->LenInBitCount[0];
197
198 pCtx->LenInBitCount[0] = (ULONG) (pCtx->LenInBitCount[0] + (LenInBytes << 3));
199
200 if (pCtx->LenInBitCount[0] < temp)
201 pCtx->LenInBitCount[1]++; //carry in
202
203 pCtx->LenInBitCount[1] += LenInBytes >> 29;
204
205 // mod 64 bytes
206 temp = (temp >> 3) & 0x3f;
207
208 // process lacks of 64-byte data
209 if (temp)
210 {
211 UCHAR *pAds = (UCHAR *) pCtx->Input + temp;
212
213 if ((temp+LenInBytes) < 64)
214 {
215 NdisMoveMemory(pAds, (UCHAR *)pData, LenInBytes);
216 return;
217 }
218
219 NdisMoveMemory(pAds, (UCHAR *)pData, 64-temp);
220 byteReverse(pCtx->Input, 16);
221 MD5Transform(pCtx->Buf, (ULONG *)pCtx->Input);
222
223 pData += 64-temp;
224 LenInBytes -= 64-temp;
225 } // end of if (temp)
226
227
228 TfTimes = (LenInBytes >> 6);
229
230 for (i=TfTimes; i>0; i--)
231 {
232 NdisMoveMemory(pCtx->Input, (UCHAR *)pData, 64);
233 byteReverse(pCtx->Input, 16);
234 MD5Transform(pCtx->Buf, (ULONG *)pCtx->Input);
235 pData += 64;
236 LenInBytes -= 64;
237 } // end of for
238
239 // buffering lacks of 64-byte data
240 if(LenInBytes)
241 NdisMoveMemory(pCtx->Input, (UCHAR *)pData, LenInBytes);
242
243 }
244
245
246 /*
247 * Function Description:
248 * Append padding bits and length of original message in the tail
249 * The message digest has to be completed in the end
250 *
251 * Arguments:
252 * Digest Output of Digest-Message for MD5
253 * pCtx Pointer to MD5 context
254 *
255 * Return Value:
256 * None
257 *
258 * Note:
259 * Called after MD5Update
260 */
261 VOID MD5Final(UCHAR Digest[16], MD5_CTX *pCtx)
262 {
263 UCHAR Remainder;
264 UCHAR PadLenInBytes;
265 UCHAR *pAppend=0;
266 unsigned int i;
267
268 Remainder = (UCHAR)((pCtx->LenInBitCount[0] >> 3) & 0x3f);
269
270 PadLenInBytes = (Remainder < 56) ? (56-Remainder) : (120-Remainder);
271
272 pAppend = (UCHAR *)pCtx->Input + Remainder;
273
274 // padding bits without crossing block(64-byte based) boundary
275 if (Remainder < 56)
276 {
277 *pAppend = 0x80;
278 PadLenInBytes --;
279
280 NdisZeroMemory((UCHAR *)pCtx->Input + Remainder+1, PadLenInBytes);
281
282 // add data-length field, from low to high
283 for (i=0; i<4; i++)
284 {
285 pCtx->Input[56+i] = (UCHAR)((pCtx->LenInBitCount[0] >> (i << 3)) & 0xff);
286 pCtx->Input[60+i] = (UCHAR)((pCtx->LenInBitCount[1] >> (i << 3)) & 0xff);
287 }
288
289 byteReverse(pCtx->Input, 16);
290 MD5Transform(pCtx->Buf, (ULONG *)pCtx->Input);
291 } // end of if
292
293 // padding bits with crossing block(64-byte based) boundary
294 else
295 {
296 // the first block ===
297 *pAppend = 0x80;
298 PadLenInBytes --;
299
300 NdisZeroMemory((UCHAR *)pCtx->Input + Remainder+1, (64-Remainder-1));
301 PadLenInBytes -= (64 - Remainder - 1);
302
303 byteReverse(pCtx->Input, 16);
304 MD5Transform(pCtx->Buf, (ULONG *)pCtx->Input);
305
306
307 // the second block ===
308 NdisZeroMemory((UCHAR *)pCtx->Input, PadLenInBytes);
309
310 // add data-length field
311 for (i=0; i<4; i++)
312 {
313 pCtx->Input[56+i] = (UCHAR)((pCtx->LenInBitCount[0] >> (i << 3)) & 0xff);
314 pCtx->Input[60+i] = (UCHAR)((pCtx->LenInBitCount[1] >> (i << 3)) & 0xff);
315 }
316
317 byteReverse(pCtx->Input, 16);
318 MD5Transform(pCtx->Buf, (ULONG *)pCtx->Input);
319 } // end of else
320
321
322 NdisMoveMemory((UCHAR *)Digest, (ULONG *)pCtx->Buf, 16); // output
323 byteReverse((UCHAR *)Digest, 4);
324 NdisZeroMemory(pCtx, sizeof(pCtx)); // memory free
325 }
326
327
328 /*
329 * Function Description:
330 * The central algorithm of MD5, consists of four rounds and sixteen
331 * steps per round
332 *
333 * Arguments:
334 * Buf Buffers of four states (output: 16 bytes)
335 * Mes Input data (input: 64 bytes)
336 *
337 * Return Value:
338 * None
339 *
340 * Note:
341 * Called by MD5Update or MD5Final
342 */
343 VOID MD5Transform(ULONG Buf[4], ULONG Mes[16])
344 {
345 ULONG Reg[4], Temp;
346 unsigned int i;
347
348 static UCHAR LShiftVal[16] =
349 {
350 7, 12, 17, 22,
351 5, 9 , 14, 20,
352 4, 11, 16, 23,
353 6, 10, 15, 21,
354 };
355
356
357 // [equal to 4294967296*abs(sin(index))]
358 static ULONG MD5Table[64] =
359 {
360 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
361 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
362 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
363 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
364
365 0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
366 0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
367 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
368 0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
369
370 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
371 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
372 0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05,
373 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
374
375 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
376 0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
377 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
378 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391
379 };
380
381
382 for (i=0; i<4; i++)
383 Reg[i]=Buf[i];
384
385
386 // 64 steps in MD5 algorithm
387 for (i=0; i<16; i++)
388 {
389 MD5Step(MD5_F1, Reg[0], Reg[1], Reg[2], Reg[3], Mes[i],
390 MD5Table[i], LShiftVal[i & 0x3]);
391
392 // one-word right shift
393 Temp = Reg[3];
394 Reg[3] = Reg[2];
395 Reg[2] = Reg[1];
396 Reg[1] = Reg[0];
397 Reg[0] = Temp;
398 }
399 for (i=16; i<32; i++)
400 {
401 MD5Step(MD5_F2, Reg[0], Reg[1], Reg[2], Reg[3], Mes[(5*(i & 0xf)+1) & 0xf],
402 MD5Table[i], LShiftVal[(0x1 << 2)+(i & 0x3)]);
403
404 // one-word right shift
405 Temp = Reg[3];
406 Reg[3] = Reg[2];
407 Reg[2] = Reg[1];
408 Reg[1] = Reg[0];
409 Reg[0] = Temp;
410 }
411 for (i=32; i<48; i++)
412 {
413 MD5Step(MD5_F3, Reg[0], Reg[1], Reg[2], Reg[3], Mes[(3*(i & 0xf)+5) & 0xf],
414 MD5Table[i], LShiftVal[(0x1 << 3)+(i & 0x3)]);
415
416 // one-word right shift
417 Temp = Reg[3];
418 Reg[3] = Reg[2];
419 Reg[2] = Reg[1];
420 Reg[1] = Reg[0];
421 Reg[0] = Temp;
422 }
423 for (i=48; i<64; i++)
424 {
425 MD5Step(MD5_F4, Reg[0], Reg[1], Reg[2], Reg[3], Mes[(7*(i & 0xf)) & 0xf],
426 MD5Table[i], LShiftVal[(0x3 << 2)+(i & 0x3)]);
427
428 // one-word right shift
429 Temp = Reg[3];
430 Reg[3] = Reg[2];
431 Reg[2] = Reg[1];
432 Reg[1] = Reg[0];
433 Reg[0] = Temp;
434 }
435
436
437 // (temporary)output
438 for (i=0; i<4; i++)
439 Buf[i] += Reg[i];
440
441 }
442
443
444
445 /* ========================= SHA-1 implementation ========================== */
446 // four base functions for SHA-1
447 #define SHA1_F1(b, c, d) (((b) & (c)) | ((~b) & (d)))
448 #define SHA1_F2(b, c, d) ((b) ^ (c) ^ (d))
449 #define SHA1_F3(b, c, d) (((b) & (c)) | ((b) & (d)) | ((c) & (d)))
450
451
452 #define SHA1Step(f, a, b, c, d, e, w, k) \
453 ( e += ( f(b, c, d) + w + k + CYCLIC_LEFT_SHIFT(a, 5)) & 0xffffffff, \
454 b = CYCLIC_LEFT_SHIFT(b, 30) )
455
456 //Initiate SHA-1 Context satisfied in RFC 3174
457 VOID SHAInit(SHA_CTX *pCtx)
458 {
459 pCtx->Buf[0]=0x67452301;
460 pCtx->Buf[1]=0xefcdab89;
461 pCtx->Buf[2]=0x98badcfe;
462 pCtx->Buf[3]=0x10325476;
463 pCtx->Buf[4]=0xc3d2e1f0;
464
465 pCtx->LenInBitCount[0]=0;
466 pCtx->LenInBitCount[1]=0;
467 }
468
469 /*
470 * Function Description:
471 * Update SHA-1 Context, allow of an arrary of octets as the next
472 * portion of the message
473 *
474 * Arguments:
475 * pCtx Pointer to SHA-1 context
476 * pData Pointer to input data
477 * LenInBytes The length of input data (unit: byte)
478 *
479 * Return Value:
480 * error indicate more than pow(2,64) bits of data
481 *
482 * Note:
483 * Called after SHAInit or SHAUpdate(itself)
484 */
485 UCHAR SHAUpdate(SHA_CTX *pCtx, UCHAR *pData, ULONG LenInBytes)
486 {
487 ULONG TfTimes;
488 ULONG temp1,temp2;
489 unsigned int i;
490 UCHAR err=1;
491
492 temp1 = pCtx->LenInBitCount[0];
493 temp2 = pCtx->LenInBitCount[1];
494
495 pCtx->LenInBitCount[0] = (ULONG) (pCtx->LenInBitCount[0] + (LenInBytes << 3));
496 if (pCtx->LenInBitCount[0] < temp1)
497 pCtx->LenInBitCount[1]++; //carry in
498
499
500 pCtx->LenInBitCount[1] = (ULONG) (pCtx->LenInBitCount[1] +(LenInBytes >> 29));
501 if (pCtx->LenInBitCount[1] < temp2)
502 return (err); //check total length of original data
503
504
505 // mod 64 bytes
506 temp1 = (temp1 >> 3) & 0x3f;
507
508 // process lacks of 64-byte data
509 if (temp1)
510 {
511 UCHAR *pAds = (UCHAR *) pCtx->Input + temp1;
512
513 if ((temp1+LenInBytes) < 64)
514 {
515 NdisMoveMemory(pAds, (UCHAR *)pData, LenInBytes);
516 return (0);
517 }
518
519 NdisMoveMemory(pAds, (UCHAR *)pData, 64-temp1);
520 byteReverse((UCHAR *)pCtx->Input, 16);
521
522 NdisZeroMemory((UCHAR *)pCtx->Input + 64, 16);
523 SHATransform(pCtx->Buf, (ULONG *)pCtx->Input);
524
525 pData += 64-temp1;
526 LenInBytes -= 64-temp1;
527 } // end of if (temp1)
528
529
530 TfTimes = (LenInBytes >> 6);
531
532 for (i=TfTimes; i>0; i--)
533 {
534 NdisMoveMemory(pCtx->Input, (UCHAR *)pData, 64);
535 byteReverse((UCHAR *)pCtx->Input, 16);
536
537 NdisZeroMemory((UCHAR *)pCtx->Input + 64, 16);
538 SHATransform(pCtx->Buf, (ULONG *)pCtx->Input);
539 pData += 64;
540 LenInBytes -= 64;
541 } // end of for
542
543 // buffering lacks of 64-byte data
544 if(LenInBytes)
545 NdisMoveMemory(pCtx->Input, (UCHAR *)pData, LenInBytes);
546
547 return (0);
548
549 }
550
551 // Append padding bits and length of original message in the tail
552 // The message digest has to be completed in the end
553 VOID SHAFinal(SHA_CTX *pCtx, UCHAR Digest[20])
554 {
555 UCHAR Remainder;
556 UCHAR PadLenInBytes;
557 UCHAR *pAppend=0;
558 unsigned int i;
559
560 Remainder = (UCHAR)((pCtx->LenInBitCount[0] >> 3) & 0x3f);
561
562 pAppend = (UCHAR *)pCtx->Input + Remainder;
563
564 PadLenInBytes = (Remainder < 56) ? (56-Remainder) : (120-Remainder);
565
566 // padding bits without crossing block(64-byte based) boundary
567 if (Remainder < 56)
568 {
569 *pAppend = 0x80;
570 PadLenInBytes --;
571
572 NdisZeroMemory((UCHAR *)pCtx->Input + Remainder+1, PadLenInBytes);
573
574 // add data-length field, from high to low
575 for (i=0; i<4; i++)
576 {
577 pCtx->Input[56+i] = (UCHAR)((pCtx->LenInBitCount[1] >> ((3-i) << 3)) & 0xff);
578 pCtx->Input[60+i] = (UCHAR)((pCtx->LenInBitCount[0] >> ((3-i) << 3)) & 0xff);
579 }
580
581 byteReverse((UCHAR *)pCtx->Input, 16);
582 NdisZeroMemory((UCHAR *)pCtx->Input + 64, 14);
583 SHATransform(pCtx->Buf, (ULONG *)pCtx->Input);
584 } // end of if
585
586 // padding bits with crossing block(64-byte based) boundary
587 else
588 {
589 // the first block ===
590 *pAppend = 0x80;
591 PadLenInBytes --;
592
593 NdisZeroMemory((UCHAR *)pCtx->Input + Remainder+1, (64-Remainder-1));
594 PadLenInBytes -= (64 - Remainder - 1);
595
596 byteReverse((UCHAR *)pCtx->Input, 16);
597 NdisZeroMemory((UCHAR *)pCtx->Input + 64, 16);
598 SHATransform(pCtx->Buf, (ULONG *)pCtx->Input);
599
600
601 // the second block ===
602 NdisZeroMemory((UCHAR *)pCtx->Input, PadLenInBytes);
603
604 // add data-length field
605 for (i=0; i<4; i++)
606 {
607 pCtx->Input[56+i] = (UCHAR)((pCtx->LenInBitCount[1] >> ((3-i) << 3)) & 0xff);
608 pCtx->Input[60+i] = (UCHAR)((pCtx->LenInBitCount[0] >> ((3-i) << 3)) & 0xff);
609 }
610
611 byteReverse((UCHAR *)pCtx->Input, 16);
612 NdisZeroMemory((UCHAR *)pCtx->Input + 64, 16);
613 SHATransform(pCtx->Buf, (ULONG *)pCtx->Input);
614 } // end of else
615
616
617 //Output, bytereverse
618 for (i=0; i<20; i++)
619 {
620 Digest [i] = (UCHAR)(pCtx->Buf[i>>2] >> 8*(3-(i & 0x3)));
621 }
622
623 NdisZeroMemory(pCtx, sizeof(pCtx)); // memory free
624 }
625
626
627 // The central algorithm of SHA-1, consists of four rounds and
628 // twenty steps per round
629 VOID SHATransform(ULONG Buf[5], ULONG Mes[20])
630 {
631 ULONG Reg[5],Temp;
632 unsigned int i;
633 ULONG W[80];
634
635 static ULONG SHA1Table[4] = { 0x5a827999, 0x6ed9eba1,
636 0x8f1bbcdc, 0xca62c1d6 };
637
638 Reg[0]=Buf[0];
639 Reg[1]=Buf[1];
640 Reg[2]=Buf[2];
641 Reg[3]=Buf[3];
642 Reg[4]=Buf[4];
643
644 //the first octet of a word is stored in the 0th element, bytereverse
645 for(i = 0; i < 16; i++)
646 {
647 W[i] = (Mes[i] >> 24) & 0xff;
648 W[i] |= (Mes[i] >> 8 ) & 0xff00;
649 W[i] |= (Mes[i] << 8 ) & 0xff0000;
650 W[i] |= (Mes[i] << 24) & 0xff000000;
651 }
652
653
654 for (i = 0; i < 64; i++)
655 W[16+i] = CYCLIC_LEFT_SHIFT(W[i] ^ W[2+i] ^ W[8+i] ^ W[13+i], 1);
656
657
658 // 80 steps in SHA-1 algorithm
659 for (i=0; i<80; i++)
660 {
661 if (i<20)
662 SHA1Step(SHA1_F1, Reg[0], Reg[1], Reg[2], Reg[3], Reg[4],
663 W[i], SHA1Table[0]);
664
665 else if (i>=20 && i<40)
666 SHA1Step(SHA1_F2, Reg[0], Reg[1], Reg[2], Reg[3], Reg[4],
667 W[i], SHA1Table[1]);
668
669 else if (i>=40 && i<60)
670 SHA1Step(SHA1_F3, Reg[0], Reg[1], Reg[2], Reg[3], Reg[4],
671 W[i], SHA1Table[2]);
672
673 else
674 SHA1Step(SHA1_F2, Reg[0], Reg[1], Reg[2], Reg[3], Reg[4],
675 W[i], SHA1Table[3]);
676
677
678 // one-word right shift
679 Temp = Reg[4];
680 Reg[4] = Reg[3];
681 Reg[3] = Reg[2];
682 Reg[2] = Reg[1];
683 Reg[1] = Reg[0];
684 Reg[0] = Temp;
685
686 } // end of for-loop
687
688
689 // (temporary)output
690 for (i=0; i<5; i++)
691 Buf[i] += Reg[i];
692
693 }
694
695
696 /* ========================= AES En/Decryption ========================== */
697
698 /* forward S-box */
699 static uint32 FSb[256] =
700 {
701 0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5,
702 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76,
703 0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0,
704 0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0,
705 0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC,
706 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15,
707 0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A,
708 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75,
709 0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0,
710 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84,
711 0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B,
712 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF,
713 0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85,
714 0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8,
715 0x51, 0xA3, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5,
716 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2,
717 0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17,
718 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73,
719 0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88,
720 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB,
721 0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C,
722 0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79,
723 0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9,
724 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08,
725 0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6,
726 0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A,
727 0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E,
728 0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E,
729 0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94,
730 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF,
731 0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68,
732 0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16
733 };
734
735 /* forward table */
736 #define FT \
737 \
738 V(C6,63,63,A5), V(F8,7C,7C,84), V(EE,77,77,99), V(F6,7B,7B,8D), \
739 V(FF,F2,F2,0D), V(D6,6B,6B,BD), V(DE,6F,6F,B1), V(91,C5,C5,54), \
740 V(60,30,30,50), V(02,01,01,03), V(CE,67,67,A9), V(56,2B,2B,7D), \
741 V(E7,FE,FE,19), V(B5,D7,D7,62), V(4D,AB,AB,E6), V(EC,76,76,9A), \
742 V(8F,CA,CA,45), V(1F,82,82,9D), V(89,C9,C9,40), V(FA,7D,7D,87), \
743 V(EF,FA,FA,15), V(B2,59,59,EB), V(8E,47,47,C9), V(FB,F0,F0,0B), \
744 V(41,AD,AD,EC), V(B3,D4,D4,67), V(5F,A2,A2,FD), V(45,AF,AF,EA), \
745 V(23,9C,9C,BF), V(53,A4,A4,F7), V(E4,72,72,96), V(9B,C0,C0,5B), \
746 V(75,B7,B7,C2), V(E1,FD,FD,1C), V(3D,93,93,AE), V(4C,26,26,6A), \
747 V(6C,36,36,5A), V(7E,3F,3F,41), V(F5,F7,F7,02), V(83,CC,CC,4F), \
748 V(68,34,34,5C), V(51,A5,A5,F4), V(D1,E5,E5,34), V(F9,F1,F1,08), \
749 V(E2,71,71,93), V(AB,D8,D8,73), V(62,31,31,53), V(2A,15,15,3F), \
750 V(08,04,04,0C), V(95,C7,C7,52), V(46,23,23,65), V(9D,C3,C3,5E), \
751 V(30,18,18,28), V(37,96,96,A1), V(0A,05,05,0F), V(2F,9A,9A,B5), \
752 V(0E,07,07,09), V(24,12,12,36), V(1B,80,80,9B), V(DF,E2,E2,3D), \
753 V(CD,EB,EB,26), V(4E,27,27,69), V(7F,B2,B2,CD), V(EA,75,75,9F), \
754 V(12,09,09,1B), V(1D,83,83,9E), V(58,2C,2C,74), V(34,1A,1A,2E), \
755 V(36,1B,1B,2D), V(DC,6E,6E,B2), V(B4,5A,5A,EE), V(5B,A0,A0,FB), \
756 V(A4,52,52,F6), V(76,3B,3B,4D), V(B7,D6,D6,61), V(7D,B3,B3,CE), \
757 V(52,29,29,7B), V(DD,E3,E3,3E), V(5E,2F,2F,71), V(13,84,84,97), \
758 V(A6,53,53,F5), V(B9,D1,D1,68), V(00,00,00,00), V(C1,ED,ED,2C), \
759 V(40,20,20,60), V(E3,FC,FC,1F), V(79,B1,B1,C8), V(B6,5B,5B,ED), \
760 V(D4,6A,6A,BE), V(8D,CB,CB,46), V(67,BE,BE,D9), V(72,39,39,4B), \
761 V(94,4A,4A,DE), V(98,4C,4C,D4), V(B0,58,58,E8), V(85,CF,CF,4A), \
762 V(BB,D0,D0,6B), V(C5,EF,EF,2A), V(4F,AA,AA,E5), V(ED,FB,FB,16), \
763 V(86,43,43,C5), V(9A,4D,4D,D7), V(66,33,33,55), V(11,85,85,94), \
764 V(8A,45,45,CF), V(E9,F9,F9,10), V(04,02,02,06), V(FE,7F,7F,81), \
765 V(A0,50,50,F0), V(78,3C,3C,44), V(25,9F,9F,BA), V(4B,A8,A8,E3), \
766 V(A2,51,51,F3), V(5D,A3,A3,FE), V(80,40,40,C0), V(05,8F,8F,8A), \
767 V(3F,92,92,AD), V(21,9D,9D,BC), V(70,38,38,48), V(F1,F5,F5,04), \
768 V(63,BC,BC,DF), V(77,B6,B6,C1), V(AF,DA,DA,75), V(42,21,21,63), \
769 V(20,10,10,30), V(E5,FF,FF,1A), V(FD,F3,F3,0E), V(BF,D2,D2,6D), \
770 V(81,CD,CD,4C), V(18,0C,0C,14), V(26,13,13,35), V(C3,EC,EC,2F), \
771 V(BE,5F,5F,E1), V(35,97,97,A2), V(88,44,44,CC), V(2E,17,17,39), \
772 V(93,C4,C4,57), V(55,A7,A7,F2), V(FC,7E,7E,82), V(7A,3D,3D,47), \
773 V(C8,64,64,AC), V(BA,5D,5D,E7), V(32,19,19,2B), V(E6,73,73,95), \
774 V(C0,60,60,A0), V(19,81,81,98), V(9E,4F,4F,D1), V(A3,DC,DC,7F), \
775 V(44,22,22,66), V(54,2A,2A,7E), V(3B,90,90,AB), V(0B,88,88,83), \
776 V(8C,46,46,CA), V(C7,EE,EE,29), V(6B,B8,B8,D3), V(28,14,14,3C), \
777 V(A7,DE,DE,79), V(BC,5E,5E,E2), V(16,0B,0B,1D), V(AD,DB,DB,76), \
778 V(DB,E0,E0,3B), V(64,32,32,56), V(74,3A,3A,4E), V(14,0A,0A,1E), \
779 V(92,49,49,DB), V(0C,06,06,0A), V(48,24,24,6C), V(B8,5C,5C,E4), \
780 V(9F,C2,C2,5D), V(BD,D3,D3,6E), V(43,AC,AC,EF), V(C4,62,62,A6), \
781 V(39,91,91,A8), V(31,95,95,A4), V(D3,E4,E4,37), V(F2,79,79,8B), \
782 V(D5,E7,E7,32), V(8B,C8,C8,43), V(6E,37,37,59), V(DA,6D,6D,B7), \
783 V(01,8D,8D,8C), V(B1,D5,D5,64), V(9C,4E,4E,D2), V(49,A9,A9,E0), \
784 V(D8,6C,6C,B4), V(AC,56,56,FA), V(F3,F4,F4,07), V(CF,EA,EA,25), \
785 V(CA,65,65,AF), V(F4,7A,7A,8E), V(47,AE,AE,E9), V(10,08,08,18), \
786 V(6F,BA,BA,D5), V(F0,78,78,88), V(4A,25,25,6F), V(5C,2E,2E,72), \
787 V(38,1C,1C,24), V(57,A6,A6,F1), V(73,B4,B4,C7), V(97,C6,C6,51), \
788 V(CB,E8,E8,23), V(A1,DD,DD,7C), V(E8,74,74,9C), V(3E,1F,1F,21), \
789 V(96,4B,4B,DD), V(61,BD,BD,DC), V(0D,8B,8B,86), V(0F,8A,8A,85), \
790 V(E0,70,70,90), V(7C,3E,3E,42), V(71,B5,B5,C4), V(CC,66,66,AA), \
791 V(90,48,48,D8), V(06,03,03,05), V(F7,F6,F6,01), V(1C,0E,0E,12), \
792 V(C2,61,61,A3), V(6A,35,35,5F), V(AE,57,57,F9), V(69,B9,B9,D0), \
793 V(17,86,86,91), V(99,C1,C1,58), V(3A,1D,1D,27), V(27,9E,9E,B9), \
794 V(D9,E1,E1,38), V(EB,F8,F8,13), V(2B,98,98,B3), V(22,11,11,33), \
795 V(D2,69,69,BB), V(A9,D9,D9,70), V(07,8E,8E,89), V(33,94,94,A7), \
796 V(2D,9B,9B,B6), V(3C,1E,1E,22), V(15,87,87,92), V(C9,E9,E9,20), \
797 V(87,CE,CE,49), V(AA,55,55,FF), V(50,28,28,78), V(A5,DF,DF,7A), \
798 V(03,8C,8C,8F), V(59,A1,A1,F8), V(09,89,89,80), V(1A,0D,0D,17), \
799 V(65,BF,BF,DA), V(D7,E6,E6,31), V(84,42,42,C6), V(D0,68,68,B8), \
800 V(82,41,41,C3), V(29,99,99,B0), V(5A,2D,2D,77), V(1E,0F,0F,11), \
801 V(7B,B0,B0,CB), V(A8,54,54,FC), V(6D,BB,BB,D6), V(2C,16,16,3A)
802
803 #define V(a,b,c,d) 0x##a##b##c##d
804 static uint32 FT0[256] = { FT };
805 #undef V
806
807 #define V(a,b,c,d) 0x##d##a##b##c
808 static uint32 FT1[256] = { FT };
809 #undef V
810
811 #define V(a,b,c,d) 0x##c##d##a##b
812 static uint32 FT2[256] = { FT };
813 #undef V
814
815 #define V(a,b,c,d) 0x##b##c##d##a
816 static uint32 FT3[256] = { FT };
817 #undef V
818
819 #undef FT
820
821 /* reverse S-box */
822
823 static uint32 RSb[256] =
824 {
825 0x52, 0x09, 0x6A, 0xD5, 0x30, 0x36, 0xA5, 0x38,
826 0xBF, 0x40, 0xA3, 0x9E, 0x81, 0xF3, 0xD7, 0xFB,
827 0x7C, 0xE3, 0x39, 0x82, 0x9B, 0x2F, 0xFF, 0x87,
828 0x34, 0x8E, 0x43, 0x44, 0xC4, 0xDE, 0xE9, 0xCB,
829 0x54, 0x7B, 0x94, 0x32, 0xA6, 0xC2, 0x23, 0x3D,
830 0xEE, 0x4C, 0x95, 0x0B, 0x42, 0xFA, 0xC3, 0x4E,
831 0x08, 0x2E, 0xA1, 0x66, 0x28, 0xD9, 0x24, 0xB2,
832 0x76, 0x5B, 0xA2, 0x49, 0x6D, 0x8B, 0xD1, 0x25,
833 0x72, 0xF8, 0xF6, 0x64, 0x86, 0x68, 0x98, 0x16,
834 0xD4, 0xA4, 0x5C, 0xCC, 0x5D, 0x65, 0xB6, 0x92,
835 0x6C, 0x70, 0x48, 0x50, 0xFD, 0xED, 0xB9, 0xDA,
836 0x5E, 0x15, 0x46, 0x57, 0xA7, 0x8D, 0x9D, 0x84,
837 0x90, 0xD8, 0xAB, 0x00, 0x8C, 0xBC, 0xD3, 0x0A,
838 0xF7, 0xE4, 0x58, 0x05, 0xB8, 0xB3, 0x45, 0x06,
839 0xD0, 0x2C, 0x1E, 0x8F, 0xCA, 0x3F, 0x0F, 0x02,
840 0xC1, 0xAF, 0xBD, 0x03, 0x01, 0x13, 0x8A, 0x6B,
841 0x3A, 0x91, 0x11, 0x41, 0x4F, 0x67, 0xDC, 0xEA,
842 0x97, 0xF2, 0xCF, 0xCE, 0xF0, 0xB4, 0xE6, 0x73,
843 0x96, 0xAC, 0x74, 0x22, 0xE7, 0xAD, 0x35, 0x85,
844 0xE2, 0xF9, 0x37, 0xE8, 0x1C, 0x75, 0xDF, 0x6E,
845 0x47, 0xF1, 0x1A, 0x71, 0x1D, 0x29, 0xC5, 0x89,
846 0x6F, 0xB7, 0x62, 0x0E, 0xAA, 0x18, 0xBE, 0x1B,
847 0xFC, 0x56, 0x3E, 0x4B, 0xC6, 0xD2, 0x79, 0x20,
848 0x9A, 0xDB, 0xC0, 0xFE, 0x78, 0xCD, 0x5A, 0xF4,
849 0x1F, 0xDD, 0xA8, 0x33, 0x88, 0x07, 0xC7, 0x31,
850 0xB1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xEC, 0x5F,
851 0x60, 0x51, 0x7F, 0xA9, 0x19, 0xB5, 0x4A, 0x0D,
852 0x2D, 0xE5, 0x7A, 0x9F, 0x93, 0xC9, 0x9C, 0xEF,
853 0xA0, 0xE0, 0x3B, 0x4D, 0xAE, 0x2A, 0xF5, 0xB0,
854 0xC8, 0xEB, 0xBB, 0x3C, 0x83, 0x53, 0x99, 0x61,
855 0x17, 0x2B, 0x04, 0x7E, 0xBA, 0x77, 0xD6, 0x26,
856 0xE1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0C, 0x7D
857 };
858
859 /* reverse table */
860
861 #define RT \
862 \
863 V(51,F4,A7,50), V(7E,41,65,53), V(1A,17,A4,C3), V(3A,27,5E,96), \
864 V(3B,AB,6B,CB), V(1F,9D,45,F1), V(AC,FA,58,AB), V(4B,E3,03,93), \
865 V(20,30,FA,55), V(AD,76,6D,F6), V(88,CC,76,91), V(F5,02,4C,25), \
866 V(4F,E5,D7,FC), V(C5,2A,CB,D7), V(26,35,44,80), V(B5,62,A3,8F), \
867 V(DE,B1,5A,49), V(25,BA,1B,67), V(45,EA,0E,98), V(5D,FE,C0,E1), \
868 V(C3,2F,75,02), V(81,4C,F0,12), V(8D,46,97,A3), V(6B,D3,F9,C6), \
869 V(03,8F,5F,E7), V(15,92,9C,95), V(BF,6D,7A,EB), V(95,52,59,DA), \
870 V(D4,BE,83,2D), V(58,74,21,D3), V(49,E0,69,29), V(8E,C9,C8,44), \
871 V(75,C2,89,6A), V(F4,8E,79,78), V(99,58,3E,6B), V(27,B9,71,DD), \
872 V(BE,E1,4F,B6), V(F0,88,AD,17), V(C9,20,AC,66), V(7D,CE,3A,B4), \
873 V(63,DF,4A,18), V(E5,1A,31,82), V(97,51,33,60), V(62,53,7F,45), \
874 V(B1,64,77,E0), V(BB,6B,AE,84), V(FE,81,A0,1C), V(F9,08,2B,94), \
875 V(70,48,68,58), V(8F,45,FD,19), V(94,DE,6C,87), V(52,7B,F8,B7), \
876 V(AB,73,D3,23), V(72,4B,02,E2), V(E3,1F,8F,57), V(66,55,AB,2A), \
877 V(B2,EB,28,07), V(2F,B5,C2,03), V(86,C5,7B,9A), V(D3,37,08,A5), \
878 V(30,28,87,F2), V(23,BF,A5,B2), V(02,03,6A,BA), V(ED,16,82,5C), \
879 V(8A,CF,1C,2B), V(A7,79,B4,92), V(F3,07,F2,F0), V(4E,69,E2,A1), \
880 V(65,DA,F4,CD), V(06,05,BE,D5), V(D1,34,62,1F), V(C4,A6,FE,8A), \
881 V(34,2E,53,9D), V(A2,F3,55,A0), V(05,8A,E1,32), V(A4,F6,EB,75), \
882 V(0B,83,EC,39), V(40,60,EF,AA), V(5E,71,9F,06), V(BD,6E,10,51), \
883 V(3E,21,8A,F9), V(96,DD,06,3D), V(DD,3E,05,AE), V(4D,E6,BD,46), \
884 V(91,54,8D,B5), V(71,C4,5D,05), V(04,06,D4,6F), V(60,50,15,FF), \
885 V(19,98,FB,24), V(D6,BD,E9,97), V(89,40,43,CC), V(67,D9,9E,77), \
886 V(B0,E8,42,BD), V(07,89,8B,88), V(E7,19,5B,38), V(79,C8,EE,DB), \
887 V(A1,7C,0A,47), V(7C,42,0F,E9), V(F8,84,1E,C9), V(00,00,00,00), \
888 V(09,80,86,83), V(32,2B,ED,48), V(1E,11,70,AC), V(6C,5A,72,4E), \
889 V(FD,0E,FF,FB), V(0F,85,38,56), V(3D,AE,D5,1E), V(36,2D,39,27), \
890 V(0A,0F,D9,64), V(68,5C,A6,21), V(9B,5B,54,D1), V(24,36,2E,3A), \
891 V(0C,0A,67,B1), V(93,57,E7,0F), V(B4,EE,96,D2), V(1B,9B,91,9E), \
892 V(80,C0,C5,4F), V(61,DC,20,A2), V(5A,77,4B,69), V(1C,12,1A,16), \
893 V(E2,93,BA,0A), V(C0,A0,2A,E5), V(3C,22,E0,43), V(12,1B,17,1D), \
894 V(0E,09,0D,0B), V(F2,8B,C7,AD), V(2D,B6,A8,B9), V(14,1E,A9,C8), \
895 V(57,F1,19,85), V(AF,75,07,4C), V(EE,99,DD,BB), V(A3,7F,60,FD), \
896 V(F7,01,26,9F), V(5C,72,F5,BC), V(44,66,3B,C5), V(5B,FB,7E,34), \
897 V(8B,43,29,76), V(CB,23,C6,DC), V(B6,ED,FC,68), V(B8,E4,F1,63), \
898 V(D7,31,DC,CA), V(42,63,85,10), V(13,97,22,40), V(84,C6,11,20), \
899 V(85,4A,24,7D), V(D2,BB,3D,F8), V(AE,F9,32,11), V(C7,29,A1,6D), \
900 V(1D,9E,2F,4B), V(DC,B2,30,F3), V(0D,86,52,EC), V(77,C1,E3,D0), \
901 V(2B,B3,16,6C), V(A9,70,B9,99), V(11,94,48,FA), V(47,E9,64,22), \
902 V(A8,FC,8C,C4), V(A0,F0,3F,1A), V(56,7D,2C,D8), V(22,33,90,EF), \
903 V(87,49,4E,C7), V(D9,38,D1,C1), V(8C,CA,A2,FE), V(98,D4,0B,36), \
904 V(A6,F5,81,CF), V(A5,7A,DE,28), V(DA,B7,8E,26), V(3F,AD,BF,A4), \
905 V(2C,3A,9D,E4), V(50,78,92,0D), V(6A,5F,CC,9B), V(54,7E,46,62), \
906 V(F6,8D,13,C2), V(90,D8,B8,E8), V(2E,39,F7,5E), V(82,C3,AF,F5), \
907 V(9F,5D,80,BE), V(69,D0,93,7C), V(6F,D5,2D,A9), V(CF,25,12,B3), \
908 V(C8,AC,99,3B), V(10,18,7D,A7), V(E8,9C,63,6E), V(DB,3B,BB,7B), \
909 V(CD,26,78,09), V(6E,59,18,F4), V(EC,9A,B7,01), V(83,4F,9A,A8), \
910 V(E6,95,6E,65), V(AA,FF,E6,7E), V(21,BC,CF,08), V(EF,15,E8,E6), \
911 V(BA,E7,9B,D9), V(4A,6F,36,CE), V(EA,9F,09,D4), V(29,B0,7C,D6), \
912 V(31,A4,B2,AF), V(2A,3F,23,31), V(C6,A5,94,30), V(35,A2,66,C0), \
913 V(74,4E,BC,37), V(FC,82,CA,A6), V(E0,90,D0,B0), V(33,A7,D8,15), \
914 V(F1,04,98,4A), V(41,EC,DA,F7), V(7F,CD,50,0E), V(17,91,F6,2F), \
915 V(76,4D,D6,8D), V(43,EF,B0,4D), V(CC,AA,4D,54), V(E4,96,04,DF), \
916 V(9E,D1,B5,E3), V(4C,6A,88,1B), V(C1,2C,1F,B8), V(46,65,51,7F), \
917 V(9D,5E,EA,04), V(01,8C,35,5D), V(FA,87,74,73), V(FB,0B,41,2E), \
918 V(B3,67,1D,5A), V(92,DB,D2,52), V(E9,10,56,33), V(6D,D6,47,13), \
919 V(9A,D7,61,8C), V(37,A1,0C,7A), V(59,F8,14,8E), V(EB,13,3C,89), \
920 V(CE,A9,27,EE), V(B7,61,C9,35), V(E1,1C,E5,ED), V(7A,47,B1,3C), \
921 V(9C,D2,DF,59), V(55,F2,73,3F), V(18,14,CE,79), V(73,C7,37,BF), \
922 V(53,F7,CD,EA), V(5F,FD,AA,5B), V(DF,3D,6F,14), V(78,44,DB,86), \
923 V(CA,AF,F3,81), V(B9,68,C4,3E), V(38,24,34,2C), V(C2,A3,40,5F), \
924 V(16,1D,C3,72), V(BC,E2,25,0C), V(28,3C,49,8B), V(FF,0D,95,41), \
925 V(39,A8,01,71), V(08,0C,B3,DE), V(D8,B4,E4,9C), V(64,56,C1,90), \
926 V(7B,CB,84,61), V(D5,32,B6,70), V(48,6C,5C,74), V(D0,B8,57,42)
927
928 #define V(a,b,c,d) 0x##a##b##c##d
929 static uint32 RT0[256] = { RT };
930 #undef V
931
932 #define V(a,b,c,d) 0x##d##a##b##c
933 static uint32 RT1[256] = { RT };
934 #undef V
935
936 #define V(a,b,c,d) 0x##c##d##a##b
937 static uint32 RT2[256] = { RT };
938 #undef V
939
940 #define V(a,b,c,d) 0x##b##c##d##a
941 static uint32 RT3[256] = { RT };
942 #undef V
943
944 #undef RT
945
946 /* round constants */
947
948 static uint32 RCON[10] =
949 {
950 0x01000000, 0x02000000, 0x04000000, 0x08000000,
951 0x10000000, 0x20000000, 0x40000000, 0x80000000,
952 0x1B000000, 0x36000000
953 };
954
955 /* key schedule tables */
956
957 static int KT_init = 1;
958
959 static uint32 KT0[256];
960 static uint32 KT1[256];
961 static uint32 KT2[256];
962 static uint32 KT3[256];
963
964 /* platform-independant 32-bit integer manipulation macros */
965
966 #define GET_UINT32(n,b,i) \
967 { \
968 (n) = ( (uint32) (b)[(i) ] << 24 ) \
969 | ( (uint32) (b)[(i) + 1] << 16 ) \
970 | ( (uint32) (b)[(i) + 2] << 8 ) \
971 | ( (uint32) (b)[(i) + 3] ); \
972 }
973
974 #define PUT_UINT32(n,b,i) \
975 { \
976 (b)[(i) ] = (uint8) ( (n) >> 24 ); \
977 (b)[(i) + 1] = (uint8) ( (n) >> 16 ); \
978 (b)[(i) + 2] = (uint8) ( (n) >> 8 ); \
979 (b)[(i) + 3] = (uint8) ( (n) ); \
980 }
981
982 /* AES key scheduling routine */
983
984 int aes_set_key( aes_context *ctx, uint8 *key, int nbits )
985 {
986 int i;
987 uint32 *RK, *SK;
988
989 switch( nbits )
990 {
991 case 128: ctx->nr = 10; break;
992 case 192: ctx->nr = 12; break;
993 case 256: ctx->nr = 14; break;
994 default : return( 1 );
995 }
996
997 RK = ctx->erk;
998
999 for( i = 0; i < (nbits >> 5); i++ )
1000 {
1001 GET_UINT32( RK[i], key, i * 4 );
1002 }
1003
1004 /* setup encryption round keys */
1005
1006 switch( nbits )
1007 {
1008 case 128:
1009
1010 for( i = 0; i < 10; i++, RK += 4 )
1011 {
1012 RK[4] = RK[0] ^ RCON[i] ^
1013 ( FSb[ (uint8) ( RK[3] >> 16 ) ] << 24 ) ^
1014 ( FSb[ (uint8) ( RK[3] >> 8 ) ] << 16 ) ^
1015 ( FSb[ (uint8) ( RK[3] ) ] << 8 ) ^
1016 ( FSb[ (uint8) ( RK[3] >> 24 ) ] );
1017
1018 RK[5] = RK[1] ^ RK[4];
1019 RK[6] = RK[2] ^ RK[5];
1020 RK[7] = RK[3] ^ RK[6];
1021 }
1022 break;
1023
1024 case 192:
1025
1026 for( i = 0; i < 8; i++, RK += 6 )
1027 {
1028 RK[6] = RK[0] ^ RCON[i] ^
1029 ( FSb[ (uint8) ( RK[5] >> 16 ) ] << 24 ) ^
1030 ( FSb[ (uint8) ( RK[5] >> 8 ) ] << 16 ) ^
1031 ( FSb[ (uint8) ( RK[5] ) ] << 8 ) ^
1032 ( FSb[ (uint8) ( RK[5] >> 24 ) ] );
1033
1034 RK[7] = RK[1] ^ RK[6];
1035 RK[8] = RK[2] ^ RK[7];
1036 RK[9] = RK[3] ^ RK[8];
1037 RK[10] = RK[4] ^ RK[9];
1038 RK[11] = RK[5] ^ RK[10];
1039 }
1040 break;
1041
1042 case 256:
1043
1044 for( i = 0; i < 7; i++, RK += 8 )
1045 {
1046 RK[8] = RK[0] ^ RCON[i] ^
1047 ( FSb[ (uint8) ( RK[7] >> 16 ) ] << 24 ) ^
1048 ( FSb[ (uint8) ( RK[7] >> 8 ) ] << 16 ) ^
1049 ( FSb[ (uint8) ( RK[7] ) ] << 8 ) ^
1050 ( FSb[ (uint8) ( RK[7] >> 24 ) ] );
1051
1052 RK[9] = RK[1] ^ RK[8];
1053 RK[10] = RK[2] ^ RK[9];
1054 RK[11] = RK[3] ^ RK[10];
1055
1056 RK[12] = RK[4] ^
1057 ( FSb[ (uint8) ( RK[11] >> 24 ) ] << 24 ) ^
1058 ( FSb[ (uint8) ( RK[11] >> 16 ) ] << 16 ) ^
1059 ( FSb[ (uint8) ( RK[11] >> 8 ) ] << 8 ) ^
1060 ( FSb[ (uint8) ( RK[11] ) ] );
1061
1062 RK[13] = RK[5] ^ RK[12];
1063 RK[14] = RK[6] ^ RK[13];
1064 RK[15] = RK[7] ^ RK[14];
1065 }
1066 break;
1067 }
1068
1069 /* setup decryption round keys */
1070
1071 if( KT_init )
1072 {
1073 for( i = 0; i < 256; i++ )
1074 {
1075 KT0[i] = RT0[ FSb[i] ];
1076 KT1[i] = RT1[ FSb[i] ];
1077 KT2[i] = RT2[ FSb[i] ];
1078 KT3[i] = RT3[ FSb[i] ];
1079 }
1080
1081 KT_init = 0;
1082 }
1083
1084 SK = ctx->drk;
1085
1086 *SK++ = *RK++;
1087 *SK++ = *RK++;
1088 *SK++ = *RK++;
1089 *SK++ = *RK++;
1090
1091 for( i = 1; i < ctx->nr; i++ )
1092 {
1093 RK -= 8;
1094
1095 *SK++ = KT0[ (uint8) ( *RK >> 24 ) ] ^
1096 KT1[ (uint8) ( *RK >> 16 ) ] ^
1097 KT2[ (uint8) ( *RK >> 8 ) ] ^
1098 KT3[ (uint8) ( *RK ) ]; RK++;
1099
1100 *SK++ = KT0[ (uint8) ( *RK >> 24 ) ] ^
1101 KT1[ (uint8) ( *RK >> 16 ) ] ^
1102 KT2[ (uint8) ( *RK >> 8 ) ] ^
1103 KT3[ (uint8) ( *RK ) ]; RK++;
1104
1105 *SK++ = KT0[ (uint8) ( *RK >> 24 ) ] ^
1106 KT1[ (uint8) ( *RK >> 16 ) ] ^
1107 KT2[ (uint8) ( *RK >> 8 ) ] ^
1108 KT3[ (uint8) ( *RK ) ]; RK++;
1109
1110 *SK++ = KT0[ (uint8) ( *RK >> 24 ) ] ^
1111 KT1[ (uint8) ( *RK >> 16 ) ] ^
1112 KT2[ (uint8) ( *RK >> 8 ) ] ^
1113 KT3[ (uint8) ( *RK ) ]; RK++;
1114 }
1115
1116 RK -= 8;
1117
1118 *SK++ = *RK++;
1119 *SK++ = *RK++;
1120 *SK++ = *RK++;
1121 *SK++ = *RK++;
1122
1123 return( 0 );
1124 }
1125
1126 /* AES 128-bit block encryption routine */
1127
1128 void aes_encrypt(aes_context *ctx, uint8 input[16], uint8 output[16] )
1129 {
1130 uint32 *RK, X0, X1, X2, X3, Y0, Y1, Y2, Y3;
1131
1132 RK = ctx->erk;
1133 GET_UINT32( X0, input, 0 ); X0 ^= RK[0];
1134 GET_UINT32( X1, input, 4 ); X1 ^= RK[1];
1135 GET_UINT32( X2, input, 8 ); X2 ^= RK[2];
1136 GET_UINT32( X3, input, 12 ); X3 ^= RK[3];
1137
1138 #define AES_FROUND(X0,X1,X2,X3,Y0,Y1,Y2,Y3) \
1139 { \
1140 RK += 4; \
1141 \
1142 X0 = RK[0] ^ FT0[ (uint8) ( Y0 >> 24 ) ] ^ \
1143 FT1[ (uint8) ( Y1 >> 16 ) ] ^ \
1144 FT2[ (uint8) ( Y2 >> 8 ) ] ^ \
1145 FT3[ (uint8) ( Y3 ) ]; \
1146 \
1147 X1 = RK[1] ^ FT0[ (uint8) ( Y1 >> 24 ) ] ^ \
1148 FT1[ (uint8) ( Y2 >> 16 ) ] ^ \
1149 FT2[ (uint8) ( Y3 >> 8 ) ] ^ \
1150 FT3[ (uint8) ( Y0 ) ]; \
1151 \
1152 X2 = RK[2] ^ FT0[ (uint8) ( Y2 >> 24 ) ] ^ \
1153 FT1[ (uint8) ( Y3 >> 16 ) ] ^ \
1154 FT2[ (uint8) ( Y0 >> 8 ) ] ^ \
1155 FT3[ (uint8) ( Y1 ) ]; \
1156 \
1157 X3 = RK[3] ^ FT0[ (uint8) ( Y3 >> 24 ) ] ^ \
1158 FT1[ (uint8) ( Y0 >> 16 ) ] ^ \
1159 FT2[ (uint8) ( Y1 >> 8 ) ] ^ \
1160 FT3[ (uint8) ( Y2 ) ]; \
1161 }
1162
1163 AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 1 */
1164 AES_FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 2 */
1165 AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 3 */
1166 AES_FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 4 */
1167 AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 5 */
1168 AES_FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 6 */
1169 AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 7 */
1170 AES_FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 8 */
1171 AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 9 */
1172
1173 if( ctx->nr > 10 )
1174 {
1175 AES_FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 10 */
1176 AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 11 */
1177 }
1178
1179 if( ctx->nr > 12 )
1180 {
1181 AES_FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 12 */
1182 AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 13 */
1183 }
1184
1185 /* last round */
1186
1187 RK += 4;
1188
1189 X0 = RK[0] ^ ( FSb[ (uint8) ( Y0 >> 24 ) ] << 24 ) ^
1190 ( FSb[ (uint8) ( Y1 >> 16 ) ] << 16 ) ^
1191 ( FSb[ (uint8) ( Y2 >> 8 ) ] << 8 ) ^
1192 ( FSb[ (uint8) ( Y3 ) ] );
1193
1194 X1 = RK[1] ^ ( FSb[ (uint8) ( Y1 >> 24 ) ] << 24 ) ^
1195 ( FSb[ (uint8) ( Y2 >> 16 ) ] << 16 ) ^
1196 ( FSb[ (uint8) ( Y3 >> 8 ) ] << 8 ) ^
1197 ( FSb[ (uint8) ( Y0 ) ] );
1198
1199 X2 = RK[2] ^ ( FSb[ (uint8) ( Y2 >> 24 ) ] << 24 ) ^
1200 ( FSb[ (uint8) ( Y3 >> 16 ) ] << 16 ) ^
1201 ( FSb[ (uint8) ( Y0 >> 8 ) ] << 8 ) ^
1202 ( FSb[ (uint8) ( Y1 ) ] );
1203
1204 X3 = RK[3] ^ ( FSb[ (uint8) ( Y3 >> 24 ) ] << 24 ) ^
1205 ( FSb[ (uint8) ( Y0 >> 16 ) ] << 16 ) ^
1206 ( FSb[ (uint8) ( Y1 >> 8 ) ] << 8 ) ^
1207 ( FSb[ (uint8) ( Y2 ) ] );
1208
1209 PUT_UINT32( X0, output, 0 );
1210 PUT_UINT32( X1, output, 4 );
1211 PUT_UINT32( X2, output, 8 );
1212 PUT_UINT32( X3, output, 12 );
1213 }
1214
1215 /* AES 128-bit block decryption routine */
1216
1217 void aes_decrypt( aes_context *ctx, uint8 input[16], uint8 output[16] )
1218 {
1219 uint32 *RK, X0, X1, X2, X3, Y0, Y1, Y2, Y3;
1220
1221 RK = ctx->drk;
1222
1223 GET_UINT32( X0, input, 0 ); X0 ^= RK[0];
1224 GET_UINT32( X1, input, 4 ); X1 ^= RK[1];
1225 GET_UINT32( X2, input, 8 ); X2 ^= RK[2];
1226 GET_UINT32( X3, input, 12 ); X3 ^= RK[3];
1227
1228 #define AES_RROUND(X0,X1,X2,X3,Y0,Y1,Y2,Y3) \
1229 { \
1230 RK += 4; \
1231 \
1232 X0 = RK[0] ^ RT0[ (uint8) ( Y0 >> 24 ) ] ^ \
1233 RT1[ (uint8) ( Y3 >> 16 ) ] ^ \
1234 RT2[ (uint8) ( Y2 >> 8 ) ] ^ \
1235 RT3[ (uint8) ( Y1 ) ]; \
1236 \
1237 X1 = RK[1] ^ RT0[ (uint8) ( Y1 >> 24 ) ] ^ \
1238 RT1[ (uint8) ( Y0 >> 16 ) ] ^ \
1239 RT2[ (uint8) ( Y3 >> 8 ) ] ^ \
1240 RT3[ (uint8) ( Y2 ) ]; \
1241 \
1242 X2 = RK[2] ^ RT0[ (uint8) ( Y2 >> 24 ) ] ^ \
1243 RT1[ (uint8) ( Y1 >> 16 ) ] ^ \
1244 RT2[ (uint8) ( Y0 >> 8 ) ] ^ \
1245 RT3[ (uint8) ( Y3 ) ]; \
1246 \
1247 X3 = RK[3] ^ RT0[ (uint8) ( Y3 >> 24 ) ] ^ \
1248 RT1[ (uint8) ( Y2 >> 16 ) ] ^ \
1249 RT2[ (uint8) ( Y1 >> 8 ) ] ^ \
1250 RT3[ (uint8) ( Y0 ) ]; \
1251 }
1252
1253 AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 1 */
1254 AES_RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 2 */
1255 AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 3 */
1256 AES_RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 4 */
1257 AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 5 */
1258 AES_RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 6 */
1259 AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 7 */
1260 AES_RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 8 */
1261 AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 9 */
1262
1263 if( ctx->nr > 10 )
1264 {
1265 AES_RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 10 */
1266 AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 11 */
1267 }
1268
1269 if( ctx->nr > 12 )
1270 {
1271 AES_RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 12 */
1272 AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 13 */
1273 }
1274
1275 /* last round */
1276
1277 RK += 4;
1278
1279 X0 = RK[0] ^ ( RSb[ (uint8) ( Y0 >> 24 ) ] << 24 ) ^
1280 ( RSb[ (uint8) ( Y3 >> 16 ) ] << 16 ) ^
1281 ( RSb[ (uint8) ( Y2 >> 8 ) ] << 8 ) ^
1282 ( RSb[ (uint8) ( Y1 ) ] );
1283
1284 X1 = RK[1] ^ ( RSb[ (uint8) ( Y1 >> 24 ) ] << 24 ) ^
1285 ( RSb[ (uint8) ( Y0 >> 16 ) ] << 16 ) ^
1286 ( RSb[ (uint8) ( Y3 >> 8 ) ] << 8 ) ^
1287 ( RSb[ (uint8) ( Y2 ) ] );
1288
1289 X2 = RK[2] ^ ( RSb[ (uint8) ( Y2 >> 24 ) ] << 24 ) ^
1290 ( RSb[ (uint8) ( Y1 >> 16 ) ] << 16 ) ^
1291 ( RSb[ (uint8) ( Y0 >> 8 ) ] << 8 ) ^
1292 ( RSb[ (uint8) ( Y3 ) ] );
1293
1294 X3 = RK[3] ^ ( RSb[ (uint8) ( Y3 >> 24 ) ] << 24 ) ^
1295 ( RSb[ (uint8) ( Y2 >> 16 ) ] << 16 ) ^
1296 ( RSb[ (uint8) ( Y1 >> 8 ) ] << 8 ) ^
1297 ( RSb[ (uint8) ( Y0 ) ] );
1298
1299 PUT_UINT32( X0, output, 0 );
1300 PUT_UINT32( X1, output, 4 );
1301 PUT_UINT32( X2, output, 8 );
1302 PUT_UINT32( X3, output, 12 );
1303 }
1304
1305 void hmac_sha1(unsigned char *text, int text_len, unsigned char *key, int key_len, unsigned char *digest)
1306 {
1307 SHA_CTX context;
1308 unsigned char k_ipad[65]; /* inner padding - key XORd with ipad */
1309 unsigned char k_opad[65]; /* outer padding - key XORd with opad */
1310 int i;
1311
1312 /* if key is longer than 64 bytes reset it to key=SHA1(key) */
1313 if (key_len > 64)
1314 {
1315 SHA_CTX tctx;
1316
1317 SHAInit(&tctx);
1318 SHAUpdate(&tctx, key, key_len);
1319 SHAFinal(&tctx, key);
1320
1321 key_len = 20;
1322 }
1323
1324 /*
1325 * the HMAC_SHA1 transform looks like:
1326 *
1327 * SHA1(K XOR opad, SHA1(K XOR ipad, text))
1328 *
1329 * where K is an n byte key
1330 * ipad is the byte 0x36 repeated 64 times
1331 * opad is the byte 0x5c repeated 64 times
1332 * and text is the data being protected
1333 */
1334
1335 /* start out by storing key in pads */
1336 memset(k_ipad, 0, sizeof k_ipad);
1337 memset(k_opad, 0, sizeof k_opad);
1338 memcpy(k_ipad, key, key_len);
1339 memcpy(k_opad, key, key_len);
1340
1341 /* XOR key with ipad and opad values */
1342 for (i = 0; i < 64; i++)
1343 {
1344 k_ipad[i] ^= 0x36;
1345 k_opad[i] ^= 0x5c;
1346 }
1347
1348 /* perform inner SHA1*/
1349 SHAInit(&context); /* init context for 1st pass */
1350 SHAUpdate(&context, k_ipad, 64); /* start with inner pad */
1351 SHAUpdate(&context, text, text_len); /* then text of datagram */
1352 SHAFinal(&context, digest); /* finish up 1st pass */
1353
1354 /* perform outer SHA1 */
1355 SHAInit(&context); /* init context for 2nd pass */
1356 SHAUpdate(&context, k_opad, 64); /* start with outer pad */
1357 SHAUpdate(&context, digest, 20); /* then results of 1st hash */
1358 SHAFinal(&context, digest); /* finish up 2nd pass */
1359 }
1360
1361 /*
1362 * F(P, S, c, i) = U1 xor U2 xor ... Uc
1363 * U1 = PRF(P, S || Int(i))
1364 * U2 = PRF(P, U1)
1365 * Uc = PRF(P, Uc-1)
1366 */
1367
1368 void F(char *password, unsigned char *ssid, int ssidlength, int iterations, int count, unsigned char *output)
1369 {
1370 unsigned char digest[36], digest1[SHA_DIGEST_LEN];
1371 int i, j;
1372
1373 /* U1 = PRF(P, S || int(i)) */
1374 memcpy(digest, ssid, ssidlength);
1375 digest[ssidlength] = (unsigned char)((count>>24) & 0xff);
1376 digest[ssidlength+1] = (unsigned char)((count>>16) & 0xff);
1377 digest[ssidlength+2] = (unsigned char)((count>>8) & 0xff);
1378 digest[ssidlength+3] = (unsigned char)(count & 0xff);
1379 hmac_sha1(digest, ssidlength+4, (unsigned char*) password, (int) strlen(password), digest1); // for WPA update
1380
1381 /* output = U1 */
1382 memcpy(output, digest1, SHA_DIGEST_LEN);
1383
1384 for (i = 1; i < iterations; i++)
1385 {
1386 /* Un = PRF(P, Un-1) */
1387 hmac_sha1(digest1, SHA_DIGEST_LEN, (unsigned char*) password, (int) strlen(password), digest); // for WPA update
1388 memcpy(digest1, digest, SHA_DIGEST_LEN);
1389
1390 /* output = output xor Un */
1391 for (j = 0; j < SHA_DIGEST_LEN; j++)
1392 {
1393 output[j] ^= digest[j];
1394 }
1395 }
1396 }
1397
1398 /*
1399 * password - ascii string up to 63 characters in length
1400 * ssid - octet string up to 32 octets
1401 * ssidlength - length of ssid in octets
1402 * output must be 40 octets in length and outputs 256 bits of key
1403 */
1404 int PasswordHash(char *password, unsigned char *ssid, int ssidlength, unsigned char *output)
1405 {
1406 if ((strlen(password) > 63) || (ssidlength > 32))
1407 return 0;
1408
1409 F(password, ssid, ssidlength, 4096, 1, output);
1410 F(password, ssid, ssidlength, 4096, 2, &output[SHA_DIGEST_LEN]);
1411 return 1;
1412 }
MOXA 2.6.9 from sdlinux-moxaart.tgz