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1.1 root 1: /*
2: * This is D3DES (V5.09) by Richard Outerbridge with the double and
3: * triple-length support removed for use in VNC. Also the bytebit[] array
4: * has been reversed so that the most significant bit in each byte of the
5: * key is ignored, not the least significant.
6: *
7: * These changes are:
8: * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
9: *
10: * This software is distributed in the hope that it will be useful,
11: * but WITHOUT ANY WARRANTY; without even the implied warranty of
12: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13: */
14:
15: /* D3DES (V5.09) -
16: *
17: * A portable, public domain, version of the Data Encryption Standard.
18: *
19: * Written with Symantec's THINK (Lightspeed) C by Richard Outerbridge.
20: * Thanks to: Dan Hoey for his excellent Initial and Inverse permutation
21: * code; Jim Gillogly & Phil Karn for the DES key schedule code; Dennis
22: * Ferguson, Eric Young and Dana How for comparing notes; and Ray Lau,
23: * for humouring me on.
24: *
25: * Copyright (c) 1988,1989,1990,1991,1992 by Richard Outerbridge.
26: * (GEnie : OUTER; CIS : [71755,204]) Graven Imagery, 1992.
27: */
28:
29: #include "d3des.h"
30:
31: static void scrunch(unsigned char *, unsigned long *);
32: static void unscrun(unsigned long *, unsigned char *);
33: static void desfunc(unsigned long *, unsigned long *);
34: static void cookey(unsigned long *);
35:
36: static unsigned long KnL[32] = { 0L };
37:
38: static const unsigned short bytebit[8] = {
39: 01, 02, 04, 010, 020, 040, 0100, 0200 };
40:
41: static const unsigned long bigbyte[24] = {
42: 0x800000L, 0x400000L, 0x200000L, 0x100000L,
43: 0x80000L, 0x40000L, 0x20000L, 0x10000L,
44: 0x8000L, 0x4000L, 0x2000L, 0x1000L,
45: 0x800L, 0x400L, 0x200L, 0x100L,
46: 0x80L, 0x40L, 0x20L, 0x10L,
47: 0x8L, 0x4L, 0x2L, 0x1L };
48:
49: /* Use the key schedule specified in the Standard (ANSI X3.92-1981). */
50:
51: static const unsigned char pc1[56] = {
52: 56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, 33, 25, 17,
53: 9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35,
54: 62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21,
55: 13, 5, 60, 52, 44, 36, 28, 20, 12, 4, 27, 19, 11, 3 };
56:
57: static const unsigned char totrot[16] = {
58: 1,2,4,6,8,10,12,14,15,17,19,21,23,25,27,28 };
59:
60: static const unsigned char pc2[48] = {
61: 13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, 9,
62: 22, 18, 11, 3, 25, 7, 15, 6, 26, 19, 12, 1,
63: 40, 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47,
64: 43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31 };
65:
66: /* Thanks to James Gillogly & Phil Karn! */
67: void deskey(unsigned char *key, int edf)
68: {
69: register int i, j, l, m, n;
70: unsigned char pc1m[56], pcr[56];
71: unsigned long kn[32];
72:
73: for ( j = 0; j < 56; j++ ) {
74: l = pc1[j];
75: m = l & 07;
76: pc1m[j] = (key[l >> 3] & bytebit[m]) ? 1 : 0;
77: }
78: for( i = 0; i < 16; i++ ) {
79: if( edf == DE1 ) m = (15 - i) << 1;
80: else m = i << 1;
81: n = m + 1;
82: kn[m] = kn[n] = 0L;
83: for( j = 0; j < 28; j++ ) {
84: l = j + totrot[i];
85: if( l < 28 ) pcr[j] = pc1m[l];
86: else pcr[j] = pc1m[l - 28];
87: }
88: for( j = 28; j < 56; j++ ) {
89: l = j + totrot[i];
90: if( l < 56 ) pcr[j] = pc1m[l];
91: else pcr[j] = pc1m[l - 28];
92: }
93: for( j = 0; j < 24; j++ ) {
94: if( pcr[pc2[j]] ) kn[m] |= bigbyte[j];
95: if( pcr[pc2[j+24]] ) kn[n] |= bigbyte[j];
96: }
97: }
98: cookey(kn);
99: return;
100: }
101:
102: static void cookey(register unsigned long *raw1)
103: {
104: register unsigned long *cook, *raw0;
105: unsigned long dough[32];
106: register int i;
107:
108: cook = dough;
109: for( i = 0; i < 16; i++, raw1++ ) {
110: raw0 = raw1++;
111: *cook = (*raw0 & 0x00fc0000L) << 6;
112: *cook |= (*raw0 & 0x00000fc0L) << 10;
113: *cook |= (*raw1 & 0x00fc0000L) >> 10;
114: *cook++ |= (*raw1 & 0x00000fc0L) >> 6;
115: *cook = (*raw0 & 0x0003f000L) << 12;
116: *cook |= (*raw0 & 0x0000003fL) << 16;
117: *cook |= (*raw1 & 0x0003f000L) >> 4;
118: *cook++ |= (*raw1 & 0x0000003fL);
119: }
120: usekey(dough);
121: return;
122: }
123:
124: void cpkey(register unsigned long *into)
125: {
126: register unsigned long *from, *endp;
127:
128: from = KnL, endp = &KnL[32];
129: while( from < endp ) *into++ = *from++;
130: return;
131: }
132:
133: void usekey(register unsigned long *from)
134: {
135: register unsigned long *to, *endp;
136:
137: to = KnL, endp = &KnL[32];
138: while( to < endp ) *to++ = *from++;
139: return;
140: }
141:
142: void des(unsigned char *inblock, unsigned char *outblock)
143: {
144: unsigned long work[2];
145:
146: scrunch(inblock, work);
147: desfunc(work, KnL);
148: unscrun(work, outblock);
149: return;
150: }
151:
152: static void scrunch(register unsigned char *outof, register unsigned long *into)
153: {
154: *into = (*outof++ & 0xffL) << 24;
155: *into |= (*outof++ & 0xffL) << 16;
156: *into |= (*outof++ & 0xffL) << 8;
157: *into++ |= (*outof++ & 0xffL);
158: *into = (*outof++ & 0xffL) << 24;
159: *into |= (*outof++ & 0xffL) << 16;
160: *into |= (*outof++ & 0xffL) << 8;
161: *into |= (*outof & 0xffL);
162: return;
163: }
164:
165: static void unscrun(register unsigned long *outof, register unsigned char *into)
166: {
167: *into++ = (unsigned char)((*outof >> 24) & 0xffL);
168: *into++ = (unsigned char)((*outof >> 16) & 0xffL);
169: *into++ = (unsigned char)((*outof >> 8) & 0xffL);
170: *into++ = (unsigned char)(*outof++ & 0xffL);
171: *into++ = (unsigned char)((*outof >> 24) & 0xffL);
172: *into++ = (unsigned char)((*outof >> 16) & 0xffL);
173: *into++ = (unsigned char)((*outof >> 8) & 0xffL);
174: *into = (unsigned char)(*outof & 0xffL);
175: return;
176: }
177:
178: static const unsigned long SP1[64] = {
179: 0x01010400L, 0x00000000L, 0x00010000L, 0x01010404L,
180: 0x01010004L, 0x00010404L, 0x00000004L, 0x00010000L,
181: 0x00000400L, 0x01010400L, 0x01010404L, 0x00000400L,
182: 0x01000404L, 0x01010004L, 0x01000000L, 0x00000004L,
183: 0x00000404L, 0x01000400L, 0x01000400L, 0x00010400L,
184: 0x00010400L, 0x01010000L, 0x01010000L, 0x01000404L,
185: 0x00010004L, 0x01000004L, 0x01000004L, 0x00010004L,
186: 0x00000000L, 0x00000404L, 0x00010404L, 0x01000000L,
187: 0x00010000L, 0x01010404L, 0x00000004L, 0x01010000L,
188: 0x01010400L, 0x01000000L, 0x01000000L, 0x00000400L,
189: 0x01010004L, 0x00010000L, 0x00010400L, 0x01000004L,
190: 0x00000400L, 0x00000004L, 0x01000404L, 0x00010404L,
191: 0x01010404L, 0x00010004L, 0x01010000L, 0x01000404L,
192: 0x01000004L, 0x00000404L, 0x00010404L, 0x01010400L,
193: 0x00000404L, 0x01000400L, 0x01000400L, 0x00000000L,
194: 0x00010004L, 0x00010400L, 0x00000000L, 0x01010004L };
195:
196: static const unsigned long SP2[64] = {
197: 0x80108020L, 0x80008000L, 0x00008000L, 0x00108020L,
198: 0x00100000L, 0x00000020L, 0x80100020L, 0x80008020L,
199: 0x80000020L, 0x80108020L, 0x80108000L, 0x80000000L,
200: 0x80008000L, 0x00100000L, 0x00000020L, 0x80100020L,
201: 0x00108000L, 0x00100020L, 0x80008020L, 0x00000000L,
202: 0x80000000L, 0x00008000L, 0x00108020L, 0x80100000L,
203: 0x00100020L, 0x80000020L, 0x00000000L, 0x00108000L,
204: 0x00008020L, 0x80108000L, 0x80100000L, 0x00008020L,
205: 0x00000000L, 0x00108020L, 0x80100020L, 0x00100000L,
206: 0x80008020L, 0x80100000L, 0x80108000L, 0x00008000L,
207: 0x80100000L, 0x80008000L, 0x00000020L, 0x80108020L,
208: 0x00108020L, 0x00000020L, 0x00008000L, 0x80000000L,
209: 0x00008020L, 0x80108000L, 0x00100000L, 0x80000020L,
210: 0x00100020L, 0x80008020L, 0x80000020L, 0x00100020L,
211: 0x00108000L, 0x00000000L, 0x80008000L, 0x00008020L,
212: 0x80000000L, 0x80100020L, 0x80108020L, 0x00108000L };
213:
214: static const unsigned long SP3[64] = {
215: 0x00000208L, 0x08020200L, 0x00000000L, 0x08020008L,
216: 0x08000200L, 0x00000000L, 0x00020208L, 0x08000200L,
217: 0x00020008L, 0x08000008L, 0x08000008L, 0x00020000L,
218: 0x08020208L, 0x00020008L, 0x08020000L, 0x00000208L,
219: 0x08000000L, 0x00000008L, 0x08020200L, 0x00000200L,
220: 0x00020200L, 0x08020000L, 0x08020008L, 0x00020208L,
221: 0x08000208L, 0x00020200L, 0x00020000L, 0x08000208L,
222: 0x00000008L, 0x08020208L, 0x00000200L, 0x08000000L,
223: 0x08020200L, 0x08000000L, 0x00020008L, 0x00000208L,
224: 0x00020000L, 0x08020200L, 0x08000200L, 0x00000000L,
225: 0x00000200L, 0x00020008L, 0x08020208L, 0x08000200L,
226: 0x08000008L, 0x00000200L, 0x00000000L, 0x08020008L,
227: 0x08000208L, 0x00020000L, 0x08000000L, 0x08020208L,
228: 0x00000008L, 0x00020208L, 0x00020200L, 0x08000008L,
229: 0x08020000L, 0x08000208L, 0x00000208L, 0x08020000L,
230: 0x00020208L, 0x00000008L, 0x08020008L, 0x00020200L };
231:
232: static const unsigned long SP4[64] = {
233: 0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L,
234: 0x00802080L, 0x00800081L, 0x00800001L, 0x00002001L,
235: 0x00000000L, 0x00802000L, 0x00802000L, 0x00802081L,
236: 0x00000081L, 0x00000000L, 0x00800080L, 0x00800001L,
237: 0x00000001L, 0x00002000L, 0x00800000L, 0x00802001L,
238: 0x00000080L, 0x00800000L, 0x00002001L, 0x00002080L,
239: 0x00800081L, 0x00000001L, 0x00002080L, 0x00800080L,
240: 0x00002000L, 0x00802080L, 0x00802081L, 0x00000081L,
241: 0x00800080L, 0x00800001L, 0x00802000L, 0x00802081L,
242: 0x00000081L, 0x00000000L, 0x00000000L, 0x00802000L,
243: 0x00002080L, 0x00800080L, 0x00800081L, 0x00000001L,
244: 0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L,
245: 0x00802081L, 0x00000081L, 0x00000001L, 0x00002000L,
246: 0x00800001L, 0x00002001L, 0x00802080L, 0x00800081L,
247: 0x00002001L, 0x00002080L, 0x00800000L, 0x00802001L,
248: 0x00000080L, 0x00800000L, 0x00002000L, 0x00802080L };
249:
250: static const unsigned long SP5[64] = {
251: 0x00000100L, 0x02080100L, 0x02080000L, 0x42000100L,
252: 0x00080000L, 0x00000100L, 0x40000000L, 0x02080000L,
253: 0x40080100L, 0x00080000L, 0x02000100L, 0x40080100L,
254: 0x42000100L, 0x42080000L, 0x00080100L, 0x40000000L,
255: 0x02000000L, 0x40080000L, 0x40080000L, 0x00000000L,
256: 0x40000100L, 0x42080100L, 0x42080100L, 0x02000100L,
257: 0x42080000L, 0x40000100L, 0x00000000L, 0x42000000L,
258: 0x02080100L, 0x02000000L, 0x42000000L, 0x00080100L,
259: 0x00080000L, 0x42000100L, 0x00000100L, 0x02000000L,
260: 0x40000000L, 0x02080000L, 0x42000100L, 0x40080100L,
261: 0x02000100L, 0x40000000L, 0x42080000L, 0x02080100L,
262: 0x40080100L, 0x00000100L, 0x02000000L, 0x42080000L,
263: 0x42080100L, 0x00080100L, 0x42000000L, 0x42080100L,
264: 0x02080000L, 0x00000000L, 0x40080000L, 0x42000000L,
265: 0x00080100L, 0x02000100L, 0x40000100L, 0x00080000L,
266: 0x00000000L, 0x40080000L, 0x02080100L, 0x40000100L };
267:
268: static const unsigned long SP6[64] = {
269: 0x20000010L, 0x20400000L, 0x00004000L, 0x20404010L,
270: 0x20400000L, 0x00000010L, 0x20404010L, 0x00400000L,
271: 0x20004000L, 0x00404010L, 0x00400000L, 0x20000010L,
272: 0x00400010L, 0x20004000L, 0x20000000L, 0x00004010L,
273: 0x00000000L, 0x00400010L, 0x20004010L, 0x00004000L,
274: 0x00404000L, 0x20004010L, 0x00000010L, 0x20400010L,
275: 0x20400010L, 0x00000000L, 0x00404010L, 0x20404000L,
276: 0x00004010L, 0x00404000L, 0x20404000L, 0x20000000L,
277: 0x20004000L, 0x00000010L, 0x20400010L, 0x00404000L,
278: 0x20404010L, 0x00400000L, 0x00004010L, 0x20000010L,
279: 0x00400000L, 0x20004000L, 0x20000000L, 0x00004010L,
280: 0x20000010L, 0x20404010L, 0x00404000L, 0x20400000L,
281: 0x00404010L, 0x20404000L, 0x00000000L, 0x20400010L,
282: 0x00000010L, 0x00004000L, 0x20400000L, 0x00404010L,
283: 0x00004000L, 0x00400010L, 0x20004010L, 0x00000000L,
284: 0x20404000L, 0x20000000L, 0x00400010L, 0x20004010L };
285:
286: static const unsigned long SP7[64] = {
287: 0x00200000L, 0x04200002L, 0x04000802L, 0x00000000L,
288: 0x00000800L, 0x04000802L, 0x00200802L, 0x04200800L,
289: 0x04200802L, 0x00200000L, 0x00000000L, 0x04000002L,
290: 0x00000002L, 0x04000000L, 0x04200002L, 0x00000802L,
291: 0x04000800L, 0x00200802L, 0x00200002L, 0x04000800L,
292: 0x04000002L, 0x04200000L, 0x04200800L, 0x00200002L,
293: 0x04200000L, 0x00000800L, 0x00000802L, 0x04200802L,
294: 0x00200800L, 0x00000002L, 0x04000000L, 0x00200800L,
295: 0x04000000L, 0x00200800L, 0x00200000L, 0x04000802L,
296: 0x04000802L, 0x04200002L, 0x04200002L, 0x00000002L,
297: 0x00200002L, 0x04000000L, 0x04000800L, 0x00200000L,
298: 0x04200800L, 0x00000802L, 0x00200802L, 0x04200800L,
299: 0x00000802L, 0x04000002L, 0x04200802L, 0x04200000L,
300: 0x00200800L, 0x00000000L, 0x00000002L, 0x04200802L,
301: 0x00000000L, 0x00200802L, 0x04200000L, 0x00000800L,
302: 0x04000002L, 0x04000800L, 0x00000800L, 0x00200002L };
303:
304: static const unsigned long SP8[64] = {
305: 0x10001040L, 0x00001000L, 0x00040000L, 0x10041040L,
306: 0x10000000L, 0x10001040L, 0x00000040L, 0x10000000L,
307: 0x00040040L, 0x10040000L, 0x10041040L, 0x00041000L,
308: 0x10041000L, 0x00041040L, 0x00001000L, 0x00000040L,
309: 0x10040000L, 0x10000040L, 0x10001000L, 0x00001040L,
310: 0x00041000L, 0x00040040L, 0x10040040L, 0x10041000L,
311: 0x00001040L, 0x00000000L, 0x00000000L, 0x10040040L,
312: 0x10000040L, 0x10001000L, 0x00041040L, 0x00040000L,
313: 0x00041040L, 0x00040000L, 0x10041000L, 0x00001000L,
314: 0x00000040L, 0x10040040L, 0x00001000L, 0x00041040L,
315: 0x10001000L, 0x00000040L, 0x10000040L, 0x10040000L,
316: 0x10040040L, 0x10000000L, 0x00040000L, 0x10001040L,
317: 0x00000000L, 0x10041040L, 0x00040040L, 0x10000040L,
318: 0x10040000L, 0x10001000L, 0x10001040L, 0x00000000L,
319: 0x10041040L, 0x00041000L, 0x00041000L, 0x00001040L,
320: 0x00001040L, 0x00040040L, 0x10000000L, 0x10041000L };
321:
322: static void desfunc(register unsigned long *block, register unsigned long *keys)
323: {
324: register unsigned long fval, work, right, leftt;
325: register int round;
326:
327: leftt = block[0];
328: right = block[1];
329: work = ((leftt >> 4) ^ right) & 0x0f0f0f0fL;
330: right ^= work;
331: leftt ^= (work << 4);
332: work = ((leftt >> 16) ^ right) & 0x0000ffffL;
333: right ^= work;
334: leftt ^= (work << 16);
335: work = ((right >> 2) ^ leftt) & 0x33333333L;
336: leftt ^= work;
337: right ^= (work << 2);
338: work = ((right >> 8) ^ leftt) & 0x00ff00ffL;
339: leftt ^= work;
340: right ^= (work << 8);
341: right = ((right << 1) | ((right >> 31) & 1L)) & 0xffffffffL;
342: work = (leftt ^ right) & 0xaaaaaaaaL;
343: leftt ^= work;
344: right ^= work;
345: leftt = ((leftt << 1) | ((leftt >> 31) & 1L)) & 0xffffffffL;
346:
347: for( round = 0; round < 8; round++ ) {
348: work = (right << 28) | (right >> 4);
349: work ^= *keys++;
350: fval = SP7[ work & 0x3fL];
351: fval |= SP5[(work >> 8) & 0x3fL];
352: fval |= SP3[(work >> 16) & 0x3fL];
353: fval |= SP1[(work >> 24) & 0x3fL];
354: work = right ^ *keys++;
355: fval |= SP8[ work & 0x3fL];
356: fval |= SP6[(work >> 8) & 0x3fL];
357: fval |= SP4[(work >> 16) & 0x3fL];
358: fval |= SP2[(work >> 24) & 0x3fL];
359: leftt ^= fval;
360: work = (leftt << 28) | (leftt >> 4);
361: work ^= *keys++;
362: fval = SP7[ work & 0x3fL];
363: fval |= SP5[(work >> 8) & 0x3fL];
364: fval |= SP3[(work >> 16) & 0x3fL];
365: fval |= SP1[(work >> 24) & 0x3fL];
366: work = leftt ^ *keys++;
367: fval |= SP8[ work & 0x3fL];
368: fval |= SP6[(work >> 8) & 0x3fL];
369: fval |= SP4[(work >> 16) & 0x3fL];
370: fval |= SP2[(work >> 24) & 0x3fL];
371: right ^= fval;
372: }
373:
374: right = (right << 31) | (right >> 1);
375: work = (leftt ^ right) & 0xaaaaaaaaL;
376: leftt ^= work;
377: right ^= work;
378: leftt = (leftt << 31) | (leftt >> 1);
379: work = ((leftt >> 8) ^ right) & 0x00ff00ffL;
380: right ^= work;
381: leftt ^= (work << 8);
382: work = ((leftt >> 2) ^ right) & 0x33333333L;
383: right ^= work;
384: leftt ^= (work << 2);
385: work = ((right >> 16) ^ leftt) & 0x0000ffffL;
386: leftt ^= work;
387: right ^= (work << 16);
388: work = ((right >> 4) ^ leftt) & 0x0f0f0f0fL;
389: leftt ^= work;
390: right ^= (work << 4);
391: *block++ = right;
392: *block = leftt;
393: return;
394: }
395:
396: /* Validation sets:
397: *
398: * Single-length key, single-length plaintext -
399: * Key : 0123 4567 89ab cdef
400: * Plain : 0123 4567 89ab cde7
401: * Cipher : c957 4425 6a5e d31d
402: *
403: * Double-length key, single-length plaintext -
404: * Key : 0123 4567 89ab cdef fedc ba98 7654 3210
405: * Plain : 0123 4567 89ab cde7
406: * Cipher : 7f1d 0a77 826b 8aff
407: *
408: * Double-length key, double-length plaintext -
409: * Key : 0123 4567 89ab cdef fedc ba98 7654 3210
410: * Plain : 0123 4567 89ab cdef 0123 4567 89ab cdff
411: * Cipher : 27a0 8440 406a df60 278f 47cf 42d6 15d7
412: *
413: * Triple-length key, single-length plaintext -
414: * Key : 0123 4567 89ab cdef fedc ba98 7654 3210 89ab cdef 0123 4567
415: * Plain : 0123 4567 89ab cde7
416: * Cipher : de0b 7c06 ae5e 0ed5
417: *
418: * Triple-length key, double-length plaintext -
419: * Key : 0123 4567 89ab cdef fedc ba98 7654 3210 89ab cdef 0123 4567
420: * Plain : 0123 4567 89ab cdef 0123 4567 89ab cdff
421: * Cipher : ad0d 1b30 ac17 cf07 0ed1 1c63 81e4 4de5
422: *
423: * d3des V5.0a rwo 9208.07 18:44 Graven Imagery
424: **********************************************************************/
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