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1.1 root 1: /* crypto/des/des_enc.c */
2: /* Copyright (C) 1995-1997 Eric Young ([email protected])
3: * All rights reserved.
4: *
5: * This package is an SSL implementation written
6: * by Eric Young ([email protected]).
7: * The implementation was written so as to conform with Netscapes SSL.
8: *
9: * This library is free for commercial and non-commercial use as long as
10: * the following conditions are aheared to. The following conditions
11: * apply to all code found in this distribution, be it the RC4, RSA,
12: * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13: * included with this distribution is covered by the same copyright terms
14: * except that the holder is Tim Hudson ([email protected]).
15: *
16: * Copyright remains Eric Young's, and as such any Copyright notices in
17: * the code are not to be removed.
18: * If this package is used in a product, Eric Young should be given attribution
19: * as the author of the parts of the library used.
20: * This can be in the form of a textual message at program startup or
21: * in documentation (online or textual) provided with the package.
22: *
23: * Redistribution and use in source and binary forms, with or without
24: * modification, are permitted provided that the following conditions
25: * are met:
26: * 1. Redistributions of source code must retain the copyright
27: * notice, this list of conditions and the following disclaimer.
28: * 2. Redistributions in binary form must reproduce the above copyright
29: * notice, this list of conditions and the following disclaimer in the
30: * documentation and/or other materials provided with the distribution.
31: * 3. All advertising materials mentioning features or use of this software
32: * must display the following acknowledgement:
33: * "This product includes cryptographic software written by
34: * Eric Young ([email protected])"
35: * The word 'cryptographic' can be left out if the rouines from the library
36: * being used are not cryptographic related :-).
37: * 4. If you include any Windows specific code (or a derivative thereof) from
38: * the apps directory (application code) you must include an acknowledgement:
39: * "This product includes software written by Tim Hudson ([email protected])"
40: *
41: * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51: * SUCH DAMAGE.
52: *
53: * The licence and distribution terms for any publically available version or
54: * derivative of this code cannot be changed. i.e. this code cannot simply be
55: * copied and put under another distribution licence
56: * [including the GNU Public Licence.]
57: */
58:
1.1.1.2 root 59: /* Adapted for TrueCrypt by the TrueCrypt Foundation */
1.1 root 60:
1.1.1.2 root 61: #include "Des_locl.h"
1.1.1.3 ! root 62: #include "Common/Endian.h"
1.1 root 63:
64: void des_encrypt(data, ks, enc)
65: DES_LONG *data;
66: des_key_schedule ks;
67: int enc;
68: {
69: register DES_LONG l,r,t,u;
70: #ifdef DES_PTR
71: register unsigned char *des_SP=(unsigned char *)des_SPtrans;
72: #endif
73: #ifndef DES_UNROLL
74: register int i;
75: #endif
76: register DES_LONG *s;
77:
1.1.1.2 root 78: r=LE32(data[0]);
79: l=LE32(data[1]);
1.1 root 80:
81: IP(r,l);
82: /* Things have been modified so that the initial rotate is
83: * done outside the loop. This required the
84: * des_SPtrans values in sp.h to be rotated 1 bit to the right.
85: * One perl script later and things have a 5% speed up on a sparc2.
86: * Thanks to Richard Outerbridge <[email protected]>
87: * for pointing this out. */
88: /* clear the top bits on machines with 8byte longs */
89: /* shift left by 2 */
90: r=ROTATE(r,29)&0xffffffffL;
91: l=ROTATE(l,29)&0xffffffffL;
92:
93: s=(DES_LONG *)ks;
94: /* I don't know if it is worth the effort of loop unrolling the
95: * inner loop */
96: if (enc)
97: {
98: #ifdef DES_UNROLL
99: D_ENCRYPT(l,r, 0); /* 1 */
100: D_ENCRYPT(r,l, 2); /* 2 */
101: D_ENCRYPT(l,r, 4); /* 3 */
102: D_ENCRYPT(r,l, 6); /* 4 */
103: D_ENCRYPT(l,r, 8); /* 5 */
104: D_ENCRYPT(r,l,10); /* 6 */
105: D_ENCRYPT(l,r,12); /* 7 */
106: D_ENCRYPT(r,l,14); /* 8 */
107: D_ENCRYPT(l,r,16); /* 9 */
108: D_ENCRYPT(r,l,18); /* 10 */
109: D_ENCRYPT(l,r,20); /* 11 */
110: D_ENCRYPT(r,l,22); /* 12 */
111: D_ENCRYPT(l,r,24); /* 13 */
112: D_ENCRYPT(r,l,26); /* 14 */
113: D_ENCRYPT(l,r,28); /* 15 */
114: D_ENCRYPT(r,l,30); /* 16 */
115: #else
116: for (i=0; i<32; i+=8)
117: {
118: D_ENCRYPT(l,r,i+0); /* 1 */
119: D_ENCRYPT(r,l,i+2); /* 2 */
120: D_ENCRYPT(l,r,i+4); /* 3 */
121: D_ENCRYPT(r,l,i+6); /* 4 */
122: }
123: #endif
124: }
125: else
126: {
127: #ifdef DES_UNROLL
128: D_ENCRYPT(l,r,30); /* 16 */
129: D_ENCRYPT(r,l,28); /* 15 */
130: D_ENCRYPT(l,r,26); /* 14 */
131: D_ENCRYPT(r,l,24); /* 13 */
132: D_ENCRYPT(l,r,22); /* 12 */
133: D_ENCRYPT(r,l,20); /* 11 */
134: D_ENCRYPT(l,r,18); /* 10 */
135: D_ENCRYPT(r,l,16); /* 9 */
136: D_ENCRYPT(l,r,14); /* 8 */
137: D_ENCRYPT(r,l,12); /* 7 */
138: D_ENCRYPT(l,r,10); /* 6 */
139: D_ENCRYPT(r,l, 8); /* 5 */
140: D_ENCRYPT(l,r, 6); /* 4 */
141: D_ENCRYPT(r,l, 4); /* 3 */
142: D_ENCRYPT(l,r, 2); /* 2 */
143: D_ENCRYPT(r,l, 0); /* 1 */
144: #else
145: for (i=30; i>0; i-=8)
146: {
147: D_ENCRYPT(l,r,i-0); /* 16 */
148: D_ENCRYPT(r,l,i-2); /* 15 */
149: D_ENCRYPT(l,r,i-4); /* 14 */
150: D_ENCRYPT(r,l,i-6); /* 13 */
151: }
152: #endif
153: }
154:
155: /* rotate and clear the top bits on machines with 8byte longs */
156: l=ROTATE(l,3)&0xffffffffL;
157: r=ROTATE(r,3)&0xffffffffL;
158:
159: FP(r,l);
1.1.1.2 root 160: data[0]=LE32(l);
161: data[1]=LE32(r);
1.1 root 162: l=r=t=u=0;
163: }
164:
165: void des_encrypt2(data, ks, enc)
166: DES_LONG *data;
167: des_key_schedule ks;
168: int enc;
169: {
170: register DES_LONG l,r,t,u;
171: #ifdef DES_PTR
172: register unsigned char *des_SP=(unsigned char *)des_SPtrans;
173: #endif
174: #ifndef DES_UNROLL
175: register int i;
176: #endif
177: register DES_LONG *s;
178:
179: r=data[0];
180: l=data[1];
181:
182: /* Things have been modified so that the initial rotate is
183: * done outside the loop. This required the
184: * des_SPtrans values in sp.h to be rotated 1 bit to the right.
185: * One perl script later and things have a 5% speed up on a sparc2.
186: * Thanks to Richard Outerbridge <[email protected]>
187: * for pointing this out. */
188: /* clear the top bits on machines with 8byte longs */
189: r=ROTATE(r,29)&0xffffffffL;
190: l=ROTATE(l,29)&0xffffffffL;
191:
192: s=(DES_LONG *)ks;
193: /* I don't know if it is worth the effort of loop unrolling the
194: * inner loop */
195: if (enc)
196: {
197: #ifdef DES_UNROLL
198: D_ENCRYPT(l,r, 0); /* 1 */
199: D_ENCRYPT(r,l, 2); /* 2 */
200: D_ENCRYPT(l,r, 4); /* 3 */
201: D_ENCRYPT(r,l, 6); /* 4 */
202: D_ENCRYPT(l,r, 8); /* 5 */
203: D_ENCRYPT(r,l,10); /* 6 */
204: D_ENCRYPT(l,r,12); /* 7 */
205: D_ENCRYPT(r,l,14); /* 8 */
206: D_ENCRYPT(l,r,16); /* 9 */
207: D_ENCRYPT(r,l,18); /* 10 */
208: D_ENCRYPT(l,r,20); /* 11 */
209: D_ENCRYPT(r,l,22); /* 12 */
210: D_ENCRYPT(l,r,24); /* 13 */
211: D_ENCRYPT(r,l,26); /* 14 */
212: D_ENCRYPT(l,r,28); /* 15 */
213: D_ENCRYPT(r,l,30); /* 16 */
214: #else
215: for (i=0; i<32; i+=8)
216: {
217: D_ENCRYPT(l,r,i+0); /* 1 */
218: D_ENCRYPT(r,l,i+2); /* 2 */
219: D_ENCRYPT(l,r,i+4); /* 3 */
220: D_ENCRYPT(r,l,i+6); /* 4 */
221: }
222: #endif
223: }
224: else
225: {
226: #ifdef DES_UNROLL
227: D_ENCRYPT(l,r,30); /* 16 */
228: D_ENCRYPT(r,l,28); /* 15 */
229: D_ENCRYPT(l,r,26); /* 14 */
230: D_ENCRYPT(r,l,24); /* 13 */
231: D_ENCRYPT(l,r,22); /* 12 */
232: D_ENCRYPT(r,l,20); /* 11 */
233: D_ENCRYPT(l,r,18); /* 10 */
234: D_ENCRYPT(r,l,16); /* 9 */
235: D_ENCRYPT(l,r,14); /* 8 */
236: D_ENCRYPT(r,l,12); /* 7 */
237: D_ENCRYPT(l,r,10); /* 6 */
238: D_ENCRYPT(r,l, 8); /* 5 */
239: D_ENCRYPT(l,r, 6); /* 4 */
240: D_ENCRYPT(r,l, 4); /* 3 */
241: D_ENCRYPT(l,r, 2); /* 2 */
242: D_ENCRYPT(r,l, 0); /* 1 */
243: #else
244: for (i=30; i>0; i-=8)
245: {
246: D_ENCRYPT(l,r,i-0); /* 16 */
247: D_ENCRYPT(r,l,i-2); /* 15 */
248: D_ENCRYPT(l,r,i-4); /* 14 */
249: D_ENCRYPT(r,l,i-6); /* 13 */
250: }
251: #endif
252: }
253: /* rotate and clear the top bits on machines with 8byte longs */
254: data[0]=ROTATE(l,3)&0xffffffffL;
255: data[1]=ROTATE(r,3)&0xffffffffL;
256: l=r=t=u=0;
257: }
258:
259: void des_encrypt3(data,ks1,ks2,ks3)
260: DES_LONG *data;
261: des_key_schedule ks1;
262: des_key_schedule ks2;
263: des_key_schedule ks3;
264: {
265: register DES_LONG l,r;
266:
267: l=data[0];
268: r=data[1];
269: IP(l,r);
270: data[0]=l;
271: data[1]=r;
272: des_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT);
273: des_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT);
274: des_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT);
275: l=data[0];
276: r=data[1];
277: FP(r,l);
278: data[0]=l;
279: data[1]=r;
280: }
281:
282: void des_decrypt3(data,ks1,ks2,ks3)
283: DES_LONG *data;
284: des_key_schedule ks1;
285: des_key_schedule ks2;
286: des_key_schedule ks3;
287: {
288: register DES_LONG l,r;
289:
290: l=data[0];
291: r=data[1];
292: IP(l,r);
293: data[0]=l;
294: data[1]=r;
295: des_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT);
296: des_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT);
297: des_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT);
298: l=data[0];
299: r=data[1];
300: FP(r,l);
301: data[0]=l;
302: data[1]=r;
303: }
304:
305: #ifndef DES_DEFAULT_OPTIONS
306:
307: void des_ncbc_encrypt(input, output, length, schedule, ivec, enc)
308: des_cblock (*input);
309: des_cblock (*output);
310: long length;
311: des_key_schedule schedule;
312: des_cblock (*ivec);
313: int enc;
314: {
315: register DES_LONG tin0,tin1;
316: register DES_LONG tout0,tout1,xor0,xor1;
317: register unsigned char *in,*out;
318: register long l=length;
319: DES_LONG tin[2];
320: unsigned char *iv;
321:
322: in=(unsigned char *)input;
323: out=(unsigned char *)output;
324: iv=(unsigned char *)ivec;
325:
326: if (enc)
327: {
328: c2l(iv,tout0);
329: c2l(iv,tout1);
330: for (l-=8; l>=0; l-=8)
331: {
332: c2l(in,tin0);
333: c2l(in,tin1);
334: tin0^=tout0; tin[0]=tin0;
335: tin1^=tout1; tin[1]=tin1;
336: des_encrypt((DES_LONG *)tin,schedule,DES_ENCRYPT);
337: tout0=tin[0]; l2c(tout0,out);
338: tout1=tin[1]; l2c(tout1,out);
339: }
340: if (l != -8)
341: {
342: c2ln(in,tin0,tin1,l+8);
343: tin0^=tout0; tin[0]=tin0;
344: tin1^=tout1; tin[1]=tin1;
345: des_encrypt((DES_LONG *)tin,schedule,DES_ENCRYPT);
346: tout0=tin[0]; l2c(tout0,out);
347: tout1=tin[1]; l2c(tout1,out);
348: }
349: iv=(unsigned char *)ivec;
350: l2c(tout0,iv);
351: l2c(tout1,iv);
352: }
353: else
354: {
355: c2l(iv,xor0);
356: c2l(iv,xor1);
357: for (l-=8; l>=0; l-=8)
358: {
359: c2l(in,tin0); tin[0]=tin0;
360: c2l(in,tin1); tin[1]=tin1;
361: des_encrypt((DES_LONG *)tin,schedule,DES_DECRYPT);
362: tout0=tin[0]^xor0;
363: tout1=tin[1]^xor1;
364: l2c(tout0,out);
365: l2c(tout1,out);
366: xor0=tin0;
367: xor1=tin1;
368: }
369: if (l != -8)
370: {
371: c2l(in,tin0); tin[0]=tin0;
372: c2l(in,tin1); tin[1]=tin1;
373: des_encrypt((DES_LONG *)tin,schedule,DES_DECRYPT);
374: tout0=tin[0]^xor0;
375: tout1=tin[1]^xor1;
376: l2cn(tout0,tout1,out,l+8);
377: xor0=tin0;
378: xor1=tin1;
379: }
380:
381: iv=(unsigned char *)ivec;
382: l2c(xor0,iv);
383: l2c(xor1,iv);
384: }
385: tin0=tin1=tout0=tout1=xor0=xor1=0;
386: tin[0]=tin[1]=0;
387: }
388:
389: void des_ede3_cbc_encrypt(input, output, length, ks1, ks2, ks3, ivec, enc)
390: des_cblock (*input);
391: des_cblock (*output);
392: long length;
393: des_key_schedule ks1;
394: des_key_schedule ks2;
395: des_key_schedule ks3;
396: des_cblock (*ivec);
397: int enc;
398: {
399: register DES_LONG tin0,tin1;
400: register DES_LONG tout0,tout1,xor0,xor1;
401: register unsigned char *in,*out;
402: register long l=length;
403: DES_LONG tin[2];
404: unsigned char *iv;
405:
406: in=(unsigned char *)input;
407: out=(unsigned char *)output;
408: iv=(unsigned char *)ivec;
409:
410: if (enc)
411: {
412: c2l(iv,tout0);
413: c2l(iv,tout1);
414: for (l-=8; l>=0; l-=8)
415: {
416: c2l(in,tin0);
417: c2l(in,tin1);
418: tin0^=tout0;
419: tin1^=tout1;
420:
421: tin[0]=tin0;
422: tin[1]=tin1;
423: des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
424: tout0=tin[0];
425: tout1=tin[1];
426:
427: l2c(tout0,out);
428: l2c(tout1,out);
429: }
430: if (l != -8)
431: {
432: c2ln(in,tin0,tin1,l+8);
433: tin0^=tout0;
434: tin1^=tout1;
435:
436: tin[0]=tin0;
437: tin[1]=tin1;
438: des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
439: tout0=tin[0];
440: tout1=tin[1];
441:
442: l2c(tout0,out);
443: l2c(tout1,out);
444: }
445: iv=(unsigned char *)ivec;
446: l2c(tout0,iv);
447: l2c(tout1,iv);
448: }
449: else
450: {
451: register DES_LONG t0,t1;
452:
453: c2l(iv,xor0);
454: c2l(iv,xor1);
455: for (l-=8; l>=0; l-=8)
456: {
457: c2l(in,tin0);
458: c2l(in,tin1);
459:
460: t0=tin0;
461: t1=tin1;
462:
463: tin[0]=tin0;
464: tin[1]=tin1;
465: des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
466: tout0=tin[0];
467: tout1=tin[1];
468:
469: tout0^=xor0;
470: tout1^=xor1;
471: l2c(tout0,out);
472: l2c(tout1,out);
473: xor0=t0;
474: xor1=t1;
475: }
476: if (l != -8)
477: {
478: c2l(in,tin0);
479: c2l(in,tin1);
480:
481: t0=tin0;
482: t1=tin1;
483:
484: tin[0]=tin0;
485: tin[1]=tin1;
486: des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
487: tout0=tin[0];
488: tout1=tin[1];
489:
490: tout0^=xor0;
491: tout1^=xor1;
492: l2cn(tout0,tout1,out,l+8);
493: xor0=t0;
494: xor1=t1;
495: }
496:
497: iv=(unsigned char *)ivec;
498: l2c(xor0,iv);
499: l2c(xor1,iv);
500: }
501: tin0=tin1=tout0=tout1=xor0=xor1=0;
502: tin[0]=tin[1]=0;
503: }
504:
505: #endif /* DES_DEFAULT_OPTIONS */
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