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Import OpenSSL-0.9.8i.
[dragonfly.git] / crypto / openssl-0.9.7d / crypto / des / des.c
blob343135ff9ec505e2c0865706997a44bb249b17c7
1 /* crypto/des/des.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
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 (tjh@cryptsoft.com).
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 (eay@cryptsoft.com)"
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 (tjh@cryptsoft.com)"
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
59 #include <stdio.h>
60 #include <stdlib.h>
61 #include <string.h>
62 #include <openssl/opensslconf.h>
63 #ifndef OPENSSL_SYS_MSDOS
64 #ifndef OPENSSL_SYS_VMS
65 #include OPENSSL_UNISTD
66 #else /* OPENSSL_SYS_VMS */
67 #ifdef __DECC
68 #include <unistd.h>
69 #else /* not __DECC */
70 #include <math.h>
71 #endif /* __DECC */
72 #endif /* OPENSSL_SYS_VMS */
73 #else /* OPENSSL_SYS_MSDOS */
74 #include <io.h>
75 #endif
76
77 #include <time.h>
78 #include "des_ver.h"
79
80 #ifdef OPENSSL_SYS_VMS
81 #include <types.h>
82 #include <stat.h>
83 #else
84 #ifndef _IRIX
85 #include <sys/types.h>
86 #endif
87 #include <sys/stat.h>
88 #endif
89 #include <openssl/des.h>
90 #include <openssl/rand.h>
91 #include <openssl/ui_compat.h>
92
93 void usage(void);
94 void doencryption(void);
95 int uufwrite(unsigned char *data, int size, unsigned int num, FILE *fp);
96 void uufwriteEnd(FILE *fp);
97 int uufread(unsigned char *out,int size,unsigned int num,FILE *fp);
98 int uuencode(unsigned char *in,int num,unsigned char *out);
99 int uudecode(unsigned char *in,int num,unsigned char *out);
100 void DES_3cbc_encrypt(DES_cblock *input,DES_cblock *output,long length,
101 DES_key_schedule sk1,DES_key_schedule sk2,
102 DES_cblock *ivec1,DES_cblock *ivec2,int enc);
103 #ifdef OPENSSL_SYS_VMS
104 #define EXIT(a) exit(a&0x10000000L)
105 #else
106 #define EXIT(a) exit(a)
107 #endif
108
109 #define BUFSIZE (8*1024)
110 #define VERIFY 1
111 #define KEYSIZ 8
112 #define KEYSIZB 1024 /* should hit tty line limit first :-) */
113 char key[KEYSIZB+1];
114 int do_encrypt,longk=0;
115 FILE *DES_IN,*DES_OUT,*CKSUM_OUT;
116 char uuname[200];
117 unsigned char uubuf[50];
118 int uubufnum=0;
119 #define INUUBUFN (45*100)
120 #define OUTUUBUF (65*100)
121 unsigned char b[OUTUUBUF];
122 unsigned char bb[300];
123 DES_cblock cksum={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
124 char cksumname[200]="";
125
126 int vflag,cflag,eflag,dflag,kflag,bflag,fflag,sflag,uflag,flag3,hflag,error;
127
128 int main(int argc, char **argv)
129 {
130 int i;
131 struct stat ins,outs;
132 char *p;
133 char *in=NULL,*out=NULL;
134
135 vflag=cflag=eflag=dflag=kflag=hflag=bflag=fflag=sflag=uflag=flag3=0;
136 error=0;
137 memset(key,0,sizeof(key));
138
139 for (i=1; i<argc; i++)
140 {
141 p=argv[i];
142 if ((p[0] == '-') && (p[1] != '\0'))
143 {
144 p++;
145 while (*p)
146 {
147 switch (*(p++))
148 {
149 case '3':
150 flag3=1;
151 longk=1;
152 break;
153 case 'c':
154 cflag=1;
155 strncpy(cksumname,p,200);
156 cksumname[sizeof(cksumname)-1]='\0';
157 p+=strlen(cksumname);
158 break;
159 case 'C':
160 cflag=1;
161 longk=1;
162 strncpy(cksumname,p,200);
163 cksumname[sizeof(cksumname)-1]='\0';
164 p+=strlen(cksumname);
165 break;
166 case 'e':
167 eflag=1;
168 break;
169 case 'v':
170 vflag=1;
171 break;
172 case 'E':
173 eflag=1;
174 longk=1;
175 break;
176 case 'd':
177 dflag=1;
178 break;
179 case 'D':
180 dflag=1;
181 longk=1;
182 break;
183 case 'b':
184 bflag=1;
185 break;
186 case 'f':
187 fflag=1;
188 break;
189 case 's':
190 sflag=1;
191 break;
192 case 'u':
193 uflag=1;
194 strncpy(uuname,p,200);
195 uuname[sizeof(uuname)-1]='\0';
196 p+=strlen(uuname);
197 break;
198 case 'h':
199 hflag=1;
200 break;
201 case 'k':
202 kflag=1;
203 if ((i+1) == argc)
204 {
205 fputs("must have a key with the -k option\n",stderr);
206 error=1;
207 }
208 else
209 {
210 int j;
211
212 i++;
213 strncpy(key,argv[i],KEYSIZB);
214 for (j=strlen(argv[i])-1; j>=0; j--)
215 argv[i][j]='\0';
216 }
217 break;
218 default:
219 fprintf(stderr,"'%c' unknown flag\n",p[-1]);
220 error=1;
221 break;
222 }
223 }
224 }
225 else
226 {
227 if (in == NULL)
228 in=argv[i];
229 else if (out == NULL)
230 out=argv[i];
231 else
232 error=1;
233 }
234 }
235 if (error) usage();
236 /* We either
237 * do checksum or
238 * do encrypt or
239 * do decrypt or
240 * do decrypt then ckecksum or
241 * do checksum then encrypt
242 */
243 if (((eflag+dflag) == 1) || cflag)
244 {
245 if (eflag) do_encrypt=DES_ENCRYPT;
246 if (dflag) do_encrypt=DES_DECRYPT;
247 }
248 else
249 {
250 if (vflag)
251 {
252 #ifndef _Windows
253 fprintf(stderr,"des(1) built with %s\n",libdes_version);
254 #endif
255 EXIT(1);
256 }
257 else usage();
258 }
259
260 #ifndef _Windows
261 if (vflag) fprintf(stderr,"des(1) built with %s\n",libdes_version);
262 #endif
263 if ( (in != NULL) &&
264 (out != NULL) &&
265 #ifndef OPENSSL_SYS_MSDOS
266 (stat(in,&ins) != -1) &&
267 (stat(out,&outs) != -1) &&
268 (ins.st_dev == outs.st_dev) &&
269 (ins.st_ino == outs.st_ino))
270 #else /* OPENSSL_SYS_MSDOS */
271 (strcmp(in,out) == 0))
272 #endif
273 {
274 fputs("input and output file are the same\n",stderr);
275 EXIT(3);
276 }
277
278 if (!kflag)
279 if (des_read_pw_string(key,KEYSIZB+1,"Enter key:",eflag?VERIFY:0))
280 {
281 fputs("password error\n",stderr);
282 EXIT(2);
283 }
284
285 if (in == NULL)
286 DES_IN=stdin;
287 else if ((DES_IN=fopen(in,"r")) == NULL)
288 {
289 perror("opening input file");
290 EXIT(4);
291 }
292
293 CKSUM_OUT=stdout;
294 if (out == NULL)
295 {
296 DES_OUT=stdout;
297 CKSUM_OUT=stderr;
298 }
299 else if ((DES_OUT=fopen(out,"w")) == NULL)
300 {
301 perror("opening output file");
302 EXIT(5);
303 }
304
305 #ifdef OPENSSL_SYS_MSDOS
306 /* This should set the file to binary mode. */
307 {
308 #include <fcntl.h>
309 if (!(uflag && dflag))
310 setmode(fileno(DES_IN),O_BINARY);
311 if (!(uflag && eflag))
312 setmode(fileno(DES_OUT),O_BINARY);
313 }
314 #endif
315
316 doencryption();
317 fclose(DES_IN);
318 fclose(DES_OUT);
319 EXIT(0);
320 }
321
322 void usage(void)
323 {
324 char **u;
325 static const char *Usage[]={
326 "des <options> [input-file [output-file]]",
327 "options:",
328 "-v : des(1) version number",
329 "-e : encrypt using SunOS compatible user key to DES key conversion.",
330 "-E : encrypt ",
331 "-d : decrypt using SunOS compatible user key to DES key conversion.",
332 "-D : decrypt ",
333 "-c[ckname] : generate a cbc_cksum using SunOS compatible user key to",
334 " DES key conversion and output to ckname (stdout default,",
335 " stderr if data being output on stdout). The checksum is",
336 " generated before encryption and after decryption if used",
337 " in conjunction with -[eEdD].",
338 "-C[ckname] : generate a cbc_cksum as for -c but compatible with -[ED].",
339 "-k key : use key 'key'",
340 "-h : the key that is entered will be a hexadecimal number",
341 " that is used directly as the des key",
342 "-u[uuname] : input file is uudecoded if -[dD] or output uuencoded data if -[eE]",
343 " (uuname is the filename to put in the uuencode header).",
344 "-b : encrypt using DES in ecb encryption mode, the default is cbc mode.",
345 "-3 : encrypt using triple DES encryption. This uses 2 keys",
346 " generated from the input key. If the input key is less",
347 " than 8 characters long, this is equivalent to normal",
348 " encryption. Default is triple cbc, -b makes it triple ecb.",
349 NULL
350 };
351 for (u=(char **)Usage; *u; u++)
352 {
353 fputs(*u,stderr);
354 fputc('\n',stderr);
355 }
356
357 EXIT(1);
358 }
359
360 void doencryption(void)
361 {
362 #ifdef _LIBC
363 extern unsigned long time();
364 #endif
365
366 register int i;
367 DES_key_schedule ks,ks2;
368 DES_cblock iv,iv2;
369 char *p;
370 int num=0,j,k,l,rem,ll,len,last,ex=0;
371 DES_cblock kk,k2;
372 FILE *O;
373 int Exit=0;
374 #ifndef OPENSSL_SYS_MSDOS
375 static unsigned char buf[BUFSIZE+8],obuf[BUFSIZE+8];
376 #else
377 static unsigned char *buf=NULL,*obuf=NULL;
378
379 if (buf == NULL)
380 {
381 if ( (( buf=OPENSSL_malloc(BUFSIZE+8)) == NULL) ||
382 ((obuf=OPENSSL_malloc(BUFSIZE+8)) == NULL))
383 {
384 fputs("Not enough memory\n",stderr);
385 Exit=10;
386 goto problems;
387 }
388 }
389 #endif
390
391 if (hflag)
392 {
393 j=(flag3?16:8);
394 p=key;
395 for (i=0; i<j; i++)
396 {
397 k=0;
398 if ((*p <= '9') && (*p >= '0'))
399 k=(*p-'0')<<4;
400 else if ((*p <= 'f') && (*p >= 'a'))
401 k=(*p-'a'+10)<<4;
402 else if ((*p <= 'F') && (*p >= 'A'))
403 k=(*p-'A'+10)<<4;
404 else
405 {
406 fputs("Bad hex key\n",stderr);
407 Exit=9;
408 goto problems;
409 }
410 p++;
411 if ((*p <= '9') && (*p >= '0'))
412 k|=(*p-'0');
413 else if ((*p <= 'f') && (*p >= 'a'))
414 k|=(*p-'a'+10);
415 else if ((*p <= 'F') && (*p >= 'A'))
416 k|=(*p-'A'+10);
417 else
418 {
419 fputs("Bad hex key\n",stderr);
420 Exit=9;
421 goto problems;
422 }
423 p++;
424 if (i < 8)
425 kk[i]=k;
426 else
427 k2[i-8]=k;
428 }
429 DES_set_key_unchecked(&k2,&ks2);
430 OPENSSL_cleanse(k2,sizeof(k2));
431 }
432 else if (longk || flag3)
433 {
434 if (flag3)
435 {
436 DES_string_to_2keys(key,&kk,&k2);
437 DES_set_key_unchecked(&k2,&ks2);
438 OPENSSL_cleanse(k2,sizeof(k2));
439 }
440 else
441 DES_string_to_key(key,&kk);
442 }
443 else
444 for (i=0; i<KEYSIZ; i++)
445 {
446 l=0;
447 k=key[i];
448 for (j=0; j<8; j++)
449 {
450 if (k&1) l++;
451 k>>=1;
452 }
453 if (l & 1)
454 kk[i]=key[i]&0x7f;
455 else
456 kk[i]=key[i]|0x80;
457 }
458
459 DES_set_key_unchecked(&kk,&ks);
460 OPENSSL_cleanse(key,sizeof(key));
461 OPENSSL_cleanse(kk,sizeof(kk));
462 /* woops - A bug that does not showup under unix :-( */
463 memset(iv,0,sizeof(iv));
464 memset(iv2,0,sizeof(iv2));
465
466 l=1;
467 rem=0;
468 /* first read */
469 if (eflag || (!dflag && cflag))
470 {
471 for (;;)
472 {
473 num=l=fread(&(buf[rem]),1,BUFSIZE,DES_IN);
474 l+=rem;
475 num+=rem;
476 if (l < 0)
477 {
478 perror("read error");
479 Exit=6;
480 goto problems;
481 }
482
483 rem=l%8;
484 len=l-rem;
485 if (feof(DES_IN))
486 {
487 for (i=7-rem; i>0; i--)
488 RAND_pseudo_bytes(buf + l++, 1);
489 buf[l++]=rem;
490 ex=1;
491 len+=rem;
492 }
493 else
494 l-=rem;
495
496 if (cflag)
497 {
498 DES_cbc_cksum(buf,&cksum,
499 (long)len,&ks,&cksum);
500 if (!eflag)
501 {
502 if (feof(DES_IN)) break;
503 else continue;
504 }
505 }
506
507 if (bflag && !flag3)
508 for (i=0; i<l; i+=8)
509 DES_ecb_encrypt(
510 (DES_cblock *)&(buf[i]),
511 (DES_cblock *)&(obuf[i]),
512 &ks,do_encrypt);
513 else if (flag3 && bflag)
514 for (i=0; i<l; i+=8)
515 DES_ecb2_encrypt(
516 (DES_cblock *)&(buf[i]),
517 (DES_cblock *)&(obuf[i]),
518 &ks,&ks2,do_encrypt);
519 else if (flag3 && !bflag)
520 {
521 char tmpbuf[8];
522
523 if (rem) memcpy(tmpbuf,&(buf[l]),
524 (unsigned int)rem);
525 DES_3cbc_encrypt(
526 (DES_cblock *)buf,(DES_cblock *)obuf,
527 (long)l,ks,ks2,&iv,
528 &iv2,do_encrypt);
529 if (rem) memcpy(&(buf[l]),tmpbuf,
530 (unsigned int)rem);
531 }
532 else
533 {
534 DES_cbc_encrypt(
535 buf,obuf,
536 (long)l,&ks,&iv,do_encrypt);
537 if (l >= 8) memcpy(iv,&(obuf[l-8]),8);
538 }
539 if (rem) memcpy(buf,&(buf[l]),(unsigned int)rem);
540
541 i=0;
542 while (i < l)
543 {
544 if (uflag)
545 j=uufwrite(obuf,1,(unsigned int)l-i,
546 DES_OUT);
547 else
548 j=fwrite(obuf,1,(unsigned int)l-i,
549 DES_OUT);
550 if (j == -1)
551 {
552 perror("Write error");
553 Exit=7;
554 goto problems;
555 }
556 i+=j;
557 }
558 if (feof(DES_IN))
559 {
560 if (uflag) uufwriteEnd(DES_OUT);
561 break;
562 }
563 }
564 }
565 else /* decrypt */
566 {
567 ex=1;
568 for (;;)
569 {
570 if (ex) {
571 if (uflag)
572 l=uufread(buf,1,BUFSIZE,DES_IN);
573 else
574 l=fread(buf,1,BUFSIZE,DES_IN);
575 ex=0;
576 rem=l%8;
577 l-=rem;
578 }
579 if (l < 0)
580 {
581 perror("read error");
582 Exit=6;
583 goto problems;
584 }
585
586 if (bflag && !flag3)
587 for (i=0; i<l; i+=8)
588 DES_ecb_encrypt(
589 (DES_cblock *)&(buf[i]),
590 (DES_cblock *)&(obuf[i]),
591 &ks,do_encrypt);
592 else if (flag3 && bflag)
593 for (i=0; i<l; i+=8)
594 DES_ecb2_encrypt(
595 (DES_cblock *)&(buf[i]),
596 (DES_cblock *)&(obuf[i]),
597 &ks,&ks2,do_encrypt);
598 else if (flag3 && !bflag)
599 {
600 DES_3cbc_encrypt(
601 (DES_cblock *)buf,(DES_cblock *)obuf,
602 (long)l,ks,ks2,&iv,
603 &iv2,do_encrypt);
604 }
605 else
606 {
607 DES_cbc_encrypt(
608 buf,obuf,
609 (long)l,&ks,&iv,do_encrypt);
610 if (l >= 8) memcpy(iv,&(buf[l-8]),8);
611 }
612
613 if (uflag)
614 ll=uufread(&(buf[rem]),1,BUFSIZE,DES_IN);
615 else
616 ll=fread(&(buf[rem]),1,BUFSIZE,DES_IN);
617 ll+=rem;
618 rem=ll%8;
619 ll-=rem;
620 if (feof(DES_IN) && (ll == 0))
621 {
622 last=obuf[l-1];
623
624 if ((last > 7) || (last < 0))
625 {
626 fputs("The file was not decrypted correctly.\n",
627 stderr);
628 Exit=8;
629 last=0;
630 }
631 l=l-8+last;
632 }
633 i=0;
634 if (cflag) DES_cbc_cksum(obuf,
635 (DES_cblock *)cksum,(long)l/8*8,&ks,
636 (DES_cblock *)cksum);
637 while (i != l)
638 {
639 j=fwrite(obuf,1,(unsigned int)l-i,DES_OUT);
640 if (j == -1)
641 {
642 perror("Write error");
643 Exit=7;
644 goto problems;
645 }
646 i+=j;
647 }
648 l=ll;
649 if ((l == 0) && feof(DES_IN)) break;
650 }
651 }
652 if (cflag)
653 {
654 l=0;
655 if (cksumname[0] != '\0')
656 {
657 if ((O=fopen(cksumname,"w")) != NULL)
658 {
659 CKSUM_OUT=O;
660 l=1;
661 }
662 }
663 for (i=0; i<8; i++)
664 fprintf(CKSUM_OUT,"%02X",cksum[i]);
665 fprintf(CKSUM_OUT,"\n");
666 if (l) fclose(CKSUM_OUT);
667 }
668 problems:
669 OPENSSL_cleanse(buf,sizeof(buf));
670 OPENSSL_cleanse(obuf,sizeof(obuf));
671 OPENSSL_cleanse(&ks,sizeof(ks));
672 OPENSSL_cleanse(&ks2,sizeof(ks2));
673 OPENSSL_cleanse(iv,sizeof(iv));
674 OPENSSL_cleanse(iv2,sizeof(iv2));
675 OPENSSL_cleanse(kk,sizeof(kk));
676 OPENSSL_cleanse(k2,sizeof(k2));
677 OPENSSL_cleanse(uubuf,sizeof(uubuf));
678 OPENSSL_cleanse(b,sizeof(b));
679 OPENSSL_cleanse(bb,sizeof(bb));
680 OPENSSL_cleanse(cksum,sizeof(cksum));
681 if (Exit) EXIT(Exit);
682 }
683
684 /* We ignore this parameter but it should be > ~50 I believe */
685 int uufwrite(unsigned char *data, int size, unsigned int num, FILE *fp)
686 {
687 int i,j,left,rem,ret=num;
688 static int start=1;
689
690 if (start)
691 {
692 fprintf(fp,"begin 600 %s\n",
693 (uuname[0] == '\0')?"text.d":uuname);
694 start=0;
695 }
696
697 if (uubufnum)
698 {
699 if (uubufnum+num < 45)
700 {
701 memcpy(&(uubuf[uubufnum]),data,(unsigned int)num);
702 uubufnum+=num;
703 return(num);
704 }
705 else
706 {
707 i=45-uubufnum;
708 memcpy(&(uubuf[uubufnum]),data,(unsigned int)i);
709 j=uuencode((unsigned char *)uubuf,45,b);
710 fwrite(b,1,(unsigned int)j,fp);
711 uubufnum=0;
712 data+=i;
713 num-=i;
714 }
715 }
716
717 for (i=0; i<(((int)num)-INUUBUFN); i+=INUUBUFN)
718 {
719 j=uuencode(&(data[i]),INUUBUFN,b);
720 fwrite(b,1,(unsigned int)j,fp);
721 }
722 rem=(num-i)%45;
723 left=(num-i-rem);
724 if (left)
725 {
726 j=uuencode(&(data[i]),left,b);
727 fwrite(b,1,(unsigned int)j,fp);
728 i+=left;
729 }
730 if (i != num)
731 {
732 memcpy(uubuf,&(data[i]),(unsigned int)rem);
733 uubufnum=rem;
734 }
735 return(ret);
736 }
737
738 void uufwriteEnd(FILE *fp)
739 {
740 int j;
741 static const char *end=" \nend\n";
742
743 if (uubufnum != 0)
744 {
745 uubuf[uubufnum]='\0';
746 uubuf[uubufnum+1]='\0';
747 uubuf[uubufnum+2]='\0';
748 j=uuencode(uubuf,uubufnum,b);
749 fwrite(b,1,(unsigned int)j,fp);
750 }
751 fwrite(end,1,strlen(end),fp);
752 }
753
754 /* int size: should always be > ~ 60; I actually ignore this parameter :-) */
755 int uufread(unsigned char *out, int size, unsigned int num, FILE *fp)
756 {
757 int i,j,tot;
758 static int done=0;
759 static int valid=0;
760 static int start=1;
761
762 if (start)
763 {
764 for (;;)
765 {
766 b[0]='\0';
767 fgets((char *)b,300,fp);
768 if (b[0] == '\0')
769 {
770 fprintf(stderr,"no 'begin' found in uuencoded input\n");
771 return(-1);
772 }
773 if (strncmp((char *)b,"begin ",6) == 0) break;
774 }
775 start=0;
776 }
777 if (done) return(0);
778 tot=0;
779 if (valid)
780 {
781 memcpy(out,bb,(unsigned int)valid);
782 tot=valid;
783 valid=0;
784 }
785 for (;;)
786 {
787 b[0]='\0';
788 fgets((char *)b,300,fp);
789 if (b[0] == '\0') break;
790 i=strlen((char *)b);
791 if ((b[0] == 'e') && (b[1] == 'n') && (b[2] == 'd'))
792 {
793 done=1;
794 while (!feof(fp))
795 {
796 fgets((char *)b,300,fp);
797 }
798 break;
799 }
800 i=uudecode(b,i,bb);
801 if (i < 0) break;
802 if ((i+tot+8) > num)
803 {
804 /* num to copy to make it a multiple of 8 */
805 j=(num/8*8)-tot-8;
806 memcpy(&(out[tot]),bb,(unsigned int)j);
807 tot+=j;
808 memcpy(bb,&(bb[j]),(unsigned int)i-j);
809 valid=i-j;
810 break;
811 }
812 memcpy(&(out[tot]),bb,(unsigned int)i);
813 tot+=i;
814 }
815 return(tot);
816 }
817
818 #define ccc2l(c,l) (l =((DES_LONG)(*((c)++)))<<16, \
819 l|=((DES_LONG)(*((c)++)))<< 8, \
820 l|=((DES_LONG)(*((c)++))))
821
822 #define l2ccc(l,c) (*((c)++)=(unsigned char)(((l)>>16)&0xff), \
823 *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
824 *((c)++)=(unsigned char)(((l) )&0xff))
825
826
827 int uuencode(unsigned char *in, int num, unsigned char *out)
828 {
829 int j,i,n,tot=0;
830 DES_LONG l;
831 register unsigned char *p;
832 p=out;
833
834 for (j=0; j<num; j+=45)
835 {
836 if (j+45 > num)
837 i=(num-j);
838 else i=45;
839 *(p++)=i+' ';
840 for (n=0; n<i; n+=3)
841 {
842 ccc2l(in,l);
843 *(p++)=((l>>18)&0x3f)+' ';
844 *(p++)=((l>>12)&0x3f)+' ';
845 *(p++)=((l>> 6)&0x3f)+' ';
846 *(p++)=((l )&0x3f)+' ';
847 tot+=4;
848 }
849 *(p++)='\n';
850 tot+=2;
851 }
852 *p='\0';
853 l=0;
854 return(tot);
855 }
856
857 int uudecode(unsigned char *in, int num, unsigned char *out)
858 {
859 int j,i,k;
860 unsigned int n=0,space=0;
861 DES_LONG l;
862 DES_LONG w,x,y,z;
863 unsigned int blank=(unsigned int)'\n'-' ';
864
865 for (j=0; j<num; )
866 {
867 n= *(in++)-' ';
868 if (n == blank)
869 {
870 n=0;
871 in--;
872 }
873 if (n > 60)
874 {
875 fprintf(stderr,"uuencoded line length too long\n");
876 return(-1);
877 }
878 j++;
879
880 for (i=0; i<n; j+=4,i+=3)
881 {
882 /* the following is for cases where spaces are
883 * removed from lines.
884 */
885 if (space)
886 {
887 w=x=y=z=0;
888 }
889 else
890 {
891 w= *(in++)-' ';
892 x= *(in++)-' ';
893 y= *(in++)-' ';
894 z= *(in++)-' ';
895 }
896 if ((w > 63) || (x > 63) || (y > 63) || (z > 63))
897 {
898 k=0;
899 if (w == blank) k=1;
900 if (x == blank) k=2;
901 if (y == blank) k=3;
902 if (z == blank) k=4;
903 space=1;
904 switch (k) {
905 case 1: w=0; in--;
906 case 2: x=0; in--;
907 case 3: y=0; in--;
908 case 4: z=0; in--;
909 break;
910 case 0:
911 space=0;
912 fprintf(stderr,"bad uuencoded data values\n");
913 w=x=y=z=0;
914 return(-1);
915 break;
916 }
917 }
918 l=(w<<18)|(x<<12)|(y<< 6)|(z );
919 l2ccc(l,out);
920 }
921 if (*(in++) != '\n')
922 {
923 fprintf(stderr,"missing nl in uuencoded line\n");
924 w=x=y=z=0;
925 return(-1);
926 }
927 j++;
928 }
929 *out='\0';
930 w=x=y=z=0;
931 return(n);
932 }
DragonFly BSD