crypto/heimdal-0.6.3/lib/des/des.c

   1 /* crypto/des/des.c */
   2 /* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@mincom.oz.au).
   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@mincom.oz.au).
  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@mincom.oz.au)"
  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@mincom.oz.au)"
  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 #ifdef HAVE_CONFIG_H
  60 #include <config.h>
  61 #endif
  62
  63 #include <stdio.h>
  64 #include <stdlib.h>
  65 #include <string.h>
  66 #ifdef HAVE_UNISTD_H
  67 #include <unistd.h>
  68 #endif
  69 #ifdef HAVE_IO_H
  70 #include <io.h>
  71 #endif
  72
  73 #include <time.h>
  74 #include "des_ver.h"
  75
  76 #ifdef VMS
  77 #include <types.h>
  78 #include <stat.h>
  79 #endif
  80 #ifdef HAVE_SYS_TYPES_H
  81 #include <sys/types.h>
  82 #endif
  83 #ifdef HAVE_SYS_STAT_H
  84 #include <sys/stat.h>
  85 #endif
  86 #include "des.h"
  87
  88 #ifndef HAVE_RANDOM
  89 #define random rand
  90 #define srandom(s) srand(s)
  91 #endif
  92
  93 #ifndef NOPROTO
  94 void usage(void);
  95 void doencryption(void);
  96 int uufwrite(unsigned char *data, int size, unsigned int num, FILE *fp);
  97 void uufwriteEnd(FILE *fp);
  98 int uufread(unsigned char *out,int size,unsigned int num,FILE *fp);
  99 int uuencode(unsigned char *in,int num,unsigned char *out);
 100 int uudecode(unsigned char *in,int num,unsigned char *out);
 101 #else
 102 void usage();
 103 void doencryption();
 104 int uufwrite();
 105 void uufwriteEnd();
 106 int uufread();
 107 int uuencode();
 108 int uudecode();
 109 #endif
 110
 111 #ifdef VMS
 112 #define EXIT(a) exit(a&0x10000000)
 113 #else
 114 #define EXIT(a) exit(a)
 115 #endif
 116
 117 #define BUFSIZE (8*1024)
 118 #define VERIFY  1
 119 #define KEYSIZ  8
 120 #define KEYSIZB 1024 /* should hit tty line limit first :-) */
 121 char key[KEYSIZB+1];
 122 int do_encrypt,longk=0;
 123 FILE *DES_IN,*DES_OUT,*CKSUM_OUT;
 124 char uuname[200];
 125 unsigned char uubuf[50];
 126 int uubufnum=0;
 127 #define INUUBUFN        (45*100)
 128 #define OUTUUBUF        (65*100)
 129 unsigned char b[OUTUUBUF];
 130 unsigned char bb[300];
 131 des_cblock cksum={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
 132 char cksumname[200]="";
 133
 134 int vflag,cflag,eflag,dflag,kflag,bflag,fflag,sflag,uflag,flag3,hflag,error;
 135
 136 int main(argc, argv)
 137 int argc;
 138 char **argv;
 139         {
 140         int i;
 141         struct stat ins,outs;
 142         char *p;
 143         char *in=NULL,*out=NULL;
 144
 145         vflag=cflag=eflag=dflag=kflag=hflag=bflag=fflag=sflag=uflag=flag3=0;
 146         error=0;
 147         memset(key,0,sizeof(key));
 148
 149         for (i=1; i<argc; i++)
 150                 {
 151                 p=argv[i];
 152                 if ((p[0] == '-') && (p[1] != '\0'))
 153                         {
 154                         p++;
 155                         while (*p)
 156                                 {
 157                                 switch (*(p++))
 158                                         {
 159                                 case '3':
 160                                         flag3=1;
 161                                         longk=1;
 162                                         break;
 163                                 case 'c':
 164                                         cflag=1;
 165                                         strncpy(cksumname,p,200);
 166                                         p+=strlen(cksumname);
 167                                         break;
 168                                 case 'C':
 169                                         cflag=1;
 170                                         longk=1;
 171                                         strncpy(cksumname,p,200);
 172                                         p+=strlen(cksumname);
 173                                         break;
 174                                 case 'e':
 175                                         eflag=1;
 176                                         break;
 177                                 case 'v':
 178                                         vflag=1;
 179                                         break;
 180                                 case 'E':
 181                                         eflag=1;
 182                                         longk=1;
 183                                         break;
 184                                 case 'd':
 185                                         dflag=1;
 186                                         break;
 187                                 case 'D':
 188                                         dflag=1;
 189                                         longk=1;
 190                                         break;
 191                                 case 'b':
 192                                         bflag=1;
 193                                         break;
 194                                 case 'f':
 195                                         fflag=1;
 196                                         break;
 197                                 case 's':
 198                                         sflag=1;
 199                                         break;
 200                                 case 'u':
 201                                         uflag=1;
 202                                         strncpy(uuname,p,200);
 203                                         p+=strlen(uuname);
 204                                         break;
 205                                 case 'h':
 206                                         hflag=1;
 207                                         break;
 208                                 case 'k':
 209                                         kflag=1;
 210                                         if ((i+1) == argc)
 211                                                 {
 212                                                 fputs("must have a key with the -k option\n",stderr);
 213                                                 error=1;
 214                                                 }
 215                                         else
 216                                                 {
 217                                                 int j;
 218
 219                                                 i++;
 220                                                 strncpy(key,argv[i],KEYSIZB);
 221                                                 for (j=strlen(argv[i])-1; j>=0; j--)
 222                                                         argv[i][j]='\0';
 223                                                 }
 224                                         break;
 225                                 default:
 226                                         fprintf(stderr,"'%c' unknown flag\n",p[-1]);
 227                                         error=1;
 228                                         break;
 229                                         }
 230                                 }
 231                         }
 232                 else
 233                         {
 234                         if (in == NULL)
 235                                 in=argv[i];
 236                         else if (out == NULL)
 237                                 out=argv[i];
 238                         else
 239                                 error=1;
 240                         }
 241                 }
 242         if (error) usage();
 243         /* We either
 244          * do checksum or
 245          * do encrypt or
 246          * do decrypt or
 247          * do decrypt then ckecksum or
 248          * do checksum then encrypt
 249          */
 250         if (((eflag+dflag) == 1) || cflag)
 251                 {
 252                 if (eflag) do_encrypt=DES_ENCRYPT;
 253                 if (dflag) do_encrypt=DES_DECRYPT;
 254                 }
 255         else
 256                 {
 257                 if (vflag)
 258                         {
 259 #ifndef _Windows
 260                         fprintf(stderr,"des(1) built with %s\n",libdes_version);
 261 #endif
 262                         EXIT(1);
 263                         }
 264                 else usage();
 265                 }
 266
 267 #ifndef _Windows
 268         if (vflag) fprintf(stderr,"des(1) built with %s\n",libdes_version);
 269 #endif
 270         if (    (in != NULL) &&
 271                 (out != NULL) &&
 272 #ifndef MSDOS
 273                 (stat(in,&ins) != -1) &&
 274                 (stat(out,&outs) != -1) &&
 275                 (ins.st_dev == outs.st_dev) &&
 276                 (ins.st_ino == outs.st_ino))
 277 #else /* MSDOS */
 278                 (strcmp(in,out) == 0))
 279 #endif
 280                         {
 281                         fputs("input and output file are the same\n",stderr);
 282                         EXIT(3);
 283                         }
 284
 285         if (!kflag)
 286                 if (des_read_pw_string(key,KEYSIZB+1,"Enter key:",eflag?VERIFY:0))
 287                         {
 288                         fputs("password error\n",stderr);
 289                         EXIT(2);
 290                         }
 291
 292         if (in == NULL)
 293                 DES_IN=stdin;
 294         else if ((DES_IN=fopen(in,"r")) == NULL)
 295                 {
 296                 perror("opening input file");
 297                 EXIT(4);
 298                 }
 299
 300         CKSUM_OUT=stdout;
 301         if (out == NULL)
 302                 {
 303                 DES_OUT=stdout;
 304                 CKSUM_OUT=stderr;
 305                 }
 306         else if ((DES_OUT=fopen(out,"w")) == NULL)
 307                 {
 308                 perror("opening output file");
 309                 EXIT(5);
 310                 }
 311
 312 #ifdef MSDOS
 313         /* This should set the file to binary mode. */
 314         {
 315 #include <fcntl.h>
 316         if (!(uflag && dflag))
 317                 setmode(fileno(DES_IN),O_BINARY);
 318         if (!(uflag && eflag))
 319                 setmode(fileno(DES_OUT),O_BINARY);
 320         }
 321 #endif
 322
 323         doencryption();
 324         fclose(DES_IN);
 325         fclose(DES_OUT);
 326         EXIT(0);
 327         }
 328
 329 void usage()
 330         {
 331         char **u;
 332         static const char *Usage[]={
 333 "des <options> [input-file [output-file]]",
 334 "options:",
 335 "-v         : des(1) version number",
 336 "-e         : encrypt using sunOS compatible user key to DES key conversion.",
 337 "-E         : encrypt ",
 338 "-d         : decrypt using sunOS compatible user key to DES key conversion.",
 339 "-D         : decrypt ",
 340 "-c[ckname] : generate a cbc_cksum using sunOS compatible user key to",
 341 "             DES key conversion and output to ckname (stdout default,",
 342 "             stderr if data being output on stdout).  The checksum is",
 343 "             generated before encryption and after decryption if used",
 344 "             in conjunction with -[eEdD].",
 345 "-C[ckname] : generate a cbc_cksum as for -c but compatible with -[ED].",
 346 "-k key     : use key 'key'",
 347 "-h         : the key that is entered will be a hexidecimal number",
 348 "             that is used directly as the des key",
 349 "-u[uuname] : input file is uudecoded if -[dD] or output uuencoded data if -[eE]",
 350 "             (uuname is the filename to put in the uuencode header).",
 351 "-b         : encrypt using DES in ecb encryption mode, the defaut is cbc mode.",
 352 "-3         : encrypt using tripple DES encryption.  This uses 2 keys",
 353 "             generated from the input key.  If the input key is less",
 354 "             than 8 characters long, this is equivelent to normal",
 355 "             encryption.  Default is tripple cbc, -b makes it tripple ecb.",
 356 NULL
 357 };
 358         for (u=(char **)Usage; *u; u++)
 359                 {
 360                 fputs(*u,stderr);
 361                 fputc('\n',stderr);
 362                 }
 363
 364         EXIT(1);
 365         }
 366
 367 void doencryption()
 368         {
 369 #ifdef _LIBC
 370         extern int srandom();
 371         extern int random();
 372         extern unsigned long time();
 373 #endif
 374
 375         register int i;
 376         des_key_schedule ks,ks2;
 377         unsigned char iv[8],iv2[8];
 378         char *p;
 379         int num=0,j,k,l,rem,ll,len,last,ex=0;
 380         des_cblock kk,k2;
 381         FILE *O;
 382         int Exit=0;
 383 #ifndef MSDOS
 384         static unsigned char buf[BUFSIZE+8],obuf[BUFSIZE+8];
 385 #else
 386         static unsigned char *buf=NULL,*obuf=NULL;
 387
 388         if (buf == NULL)
 389                 {
 390                 if (    (( buf=(unsigned char *)Malloc(BUFSIZE+8)) == NULL) ||
 391                         ((obuf=(unsigned char *)Malloc(BUFSIZE+8)) == NULL))
 392                         {
 393                         fputs("Not enough memory\n",stderr);
 394                         Exit=10;
 395                         goto problems;
 396                         }
 397                 }
 398 #endif
 399
 400         if (hflag)
 401                 {
 402                 j=(flag3?16:8);
 403                 p=key;
 404                 for (i=0; i<j; i++)
 405                         {
 406                         k=0;
 407                         if ((*p <= '9') && (*p >= '0'))
 408                                 k=(*p-'0')<<4;
 409                         else if ((*p <= 'f') && (*p >= 'a'))
 410                                 k=(*p-'a'+10)<<4;
 411                         else if ((*p <= 'F') && (*p >= 'A'))
 412                                 k=(*p-'A'+10)<<4;
 413                         else
 414                                 {
 415                                 fputs("Bad hex key\n",stderr);
 416                                 Exit=9;
 417                                 goto problems;
 418                                 }
 419                         p++;
 420                         if ((*p <= '9') && (*p >= '0'))
 421                                 k|=(*p-'0');
 422                         else if ((*p <= 'f') && (*p >= 'a'))
 423                                 k|=(*p-'a'+10);
 424                         else if ((*p <= 'F') && (*p >= 'A'))
 425                                 k|=(*p-'A'+10);
 426                         else
 427                                 {
 428                                 fputs("Bad hex key\n",stderr);
 429                                 Exit=9;
 430                                 goto problems;
 431                                 }
 432                         p++;
 433                         if (i < 8)
 434                                 kk[i]=k;
 435                         else
 436                                 k2[i-8]=k;
 437                         }
 438                 des_set_key((C_Block *)k2,ks2);
 439                 memset(k2,0,sizeof(k2));
 440                 }
 441         else if (longk || flag3)
 442                 {
 443                 if (flag3)
 444                         {
 445                         des_string_to_2keys(key,(C_Block *)kk,(C_Block *)k2);
 446                         des_set_key((C_Block *)k2,ks2);
 447                         memset(k2,0,sizeof(k2));
 448                         }
 449                 else
 450                         des_string_to_key(key,(C_Block *)kk);
 451                 }
 452         else
 453                 for (i=0; i<KEYSIZ; i++)
 454                         {
 455                         l=0;
 456                         k=key[i];
 457                         for (j=0; j<8; j++)
 458                                 {
 459                                 if (k&1) l++;
 460                                 k>>=1;
 461                                 }
 462                         if (l & 1)
 463                                 kk[i]=key[i]&0x7f;
 464                         else
 465                                 kk[i]=key[i]|0x80;
 466                         }
 467
 468         des_set_key((C_Block *)kk,ks);
 469         memset(key,0,sizeof(key));
 470         memset(kk,0,sizeof(kk));
 471         /* woops - A bug that does not showup under unix :-( */
 472         memset(iv,0,sizeof(iv));
 473         memset(iv2,0,sizeof(iv2));
 474
 475         l=1;
 476         rem=0;
 477         /* first read */
 478         if (eflag || (!dflag && cflag))
 479                 {
 480                 for (;;)
 481                         {
 482                         num=l=fread(&(buf[rem]),1,BUFSIZE,DES_IN);
 483                         l+=rem;
 484                         num+=rem;
 485                         if (l < 0)
 486                                 {
 487                                 perror("read error");
 488                                 Exit=6;
 489                                 goto problems;
 490                                 }
 491
 492                         rem=l%8;
 493                         len=l-rem;
 494                         if (feof(DES_IN))
 495                                 {
 496                                 srandom((unsigned int)time(NULL));
 497                                 for (i=7-rem; i>0; i--)
 498                                         buf[l++]=random()&0xff;
 499                                 buf[l++]=rem;
 500                                 ex=1;
 501                                 len+=rem;
 502                                 }
 503                         else
 504                                 l-=rem;
 505
 506                         if (cflag)
 507                                 {
 508                                 des_cbc_cksum((C_Block *)buf,(C_Block *)cksum,
 509                                         (long)len,ks,(C_Block *)cksum);
 510                                 if (!eflag)
 511                                         {
 512                                         if (feof(DES_IN)) break;
 513                                         else continue;
 514                                         }
 515                                 }
 516
 517                         if (bflag && !flag3)
 518                                 for (i=0; i<l; i+=8)
 519                                         des_ecb_encrypt(
 520                                                 (des_cblock *)&(buf[i]),
 521                                                 (des_cblock *)&(obuf[i]),
 522                                                 ks,do_encrypt);
 523                         else if (flag3 && bflag)
 524                                 for (i=0; i<l; i+=8)
 525                                         des_ecb2_encrypt(
 526                                                 (des_cblock *)&(buf[i]),
 527                                                 (des_cblock *)&(obuf[i]),
 528                                                 ks,ks2,do_encrypt);
 529                         else if (flag3 && !bflag)
 530                                 {
 531                                 char tmpbuf[8];
 532
 533                                 if (rem) memcpy(tmpbuf,&(buf[l]),
 534                                         (unsigned int)rem);
 535                                 des_3cbc_encrypt(
 536                                         (des_cblock *)buf,(des_cblock *)obuf,
 537                                         (long)l,ks,ks2,(des_cblock *)iv,
 538                                         (des_cblock *)iv2,do_encrypt);
 539                                 if (rem) memcpy(&(buf[l]),tmpbuf,
 540                                         (unsigned int)rem);
 541                                 }
 542                         else
 543                                 {
 544                                 des_cbc_encrypt(
 545                                         (des_cblock *)buf,(des_cblock *)obuf,
 546                                         (long)l,ks,(des_cblock *)iv,do_encrypt);
 547                                 if (l >= 8) memcpy(iv,&(obuf[l-8]),8);
 548                                 }
 549                         if (rem) memcpy(buf,&(buf[l]),(unsigned int)rem);
 550
 551                         i=0;
 552                         while (i < l)
 553                                 {
 554                                 if (uflag)
 555                                         j=uufwrite(obuf,1,(unsigned int)l-i,
 556                                                 DES_OUT);
 557                                 else
 558                                         j=fwrite(obuf,1,(unsigned int)l-i,
 559                                                 DES_OUT);
 560                                 if (j == -1)
 561                                         {
 562                                         perror("Write error");
 563                                         Exit=7;
 564                                         goto problems;
 565                                         }
 566                                 i+=j;
 567                                 }
 568                         if (feof(DES_IN))
 569                                 {
 570                                 if (uflag) uufwriteEnd(DES_OUT);
 571                                 break;
 572                                 }
 573                         }
 574                 }
 575         else /* decrypt */
 576                 {
 577                 ex=1;
 578                 for (;;)
 579                         {
 580                         if (ex) {
 581                                 if (uflag)
 582                                         l=uufread(buf,1,BUFSIZE,DES_IN);
 583                                 else
 584                                         l=fread(buf,1,BUFSIZE,DES_IN);
 585                                 ex=0;
 586                                 rem=l%8;
 587                                 l-=rem;
 588                                 }
 589                         if (l < 0)
 590                                 {
 591                                 perror("read error");
 592                                 Exit=6;
 593                                 goto problems;
 594                                 }
 595
 596                         if (bflag && !flag3)
 597                                 for (i=0; i<l; i+=8)
 598                                         des_ecb_encrypt(
 599                                                 (des_cblock *)&(buf[i]),
 600                                                 (des_cblock *)&(obuf[i]),
 601                                                 ks,do_encrypt);
 602                         else if (flag3 && bflag)
 603                                 for (i=0; i<l; i+=8)
 604                                         des_ecb2_encrypt(
 605                                                 (des_cblock *)&(buf[i]),
 606                                                 (des_cblock *)&(obuf[i]),
 607                                                 ks,ks2,do_encrypt);
 608                         else if (flag3 && !bflag)
 609                                 {
 610                                 des_3cbc_encrypt(
 611                                         (des_cblock *)buf,(des_cblock *)obuf,
 612                                         (long)l,ks,ks2,(des_cblock *)iv,
 613                                         (des_cblock *)iv2,do_encrypt);
 614                                 }
 615                         else
 616                                 {
 617                                 des_cbc_encrypt(
 618                                         (des_cblock *)buf,(des_cblock *)obuf,
 619                                         (long)l,ks,(des_cblock *)iv,do_encrypt);
 620                                 if (l >= 8) memcpy(iv,&(buf[l-8]),8);
 621                                 }
 622
 623                         if (uflag)
 624                                 ll=uufread(&(buf[rem]),1,BUFSIZE,DES_IN);
 625                         else
 626                                 ll=fread(&(buf[rem]),1,BUFSIZE,DES_IN);
 627                         ll+=rem;
 628                         rem=ll%8;
 629                         ll-=rem;
 630                         if (feof(DES_IN) && (ll == 0))
 631                                 {
 632                                 last=obuf[l-1];
 633
 634                                 if ((last > 7) || (last < 0))
 635                                         {
 636                                         fputs("The file was not decrypted correctly.\n",
 637                                                 stderr);
 638                                         Exit=8;
 639                                         last=0;
 640                                         }
 641                                 l=l-8+last;
 642                                 }
 643                         i=0;
 644                         if (cflag) des_cbc_cksum((C_Block *)obuf,
 645                                 (C_Block *)cksum,(long)l/8*8,ks,
 646                                 (C_Block *)cksum);
 647                         while (i != l)
 648                                 {
 649                                 j=fwrite(obuf,1,(unsigned int)l-i,DES_OUT);
 650                                 if (j == -1)
 651                                         {
 652                                         perror("Write error");
 653                                         Exit=7;
 654                                         goto problems;
 655                                         }
 656                                 i+=j;
 657                                 }
 658                         l=ll;
 659                         if ((l == 0) && feof(DES_IN)) break;
 660                         }
 661                 }
 662         if (cflag)
 663                 {
 664                 l=0;
 665                 if (cksumname[0] != '\0')
 666                         {
 667                         if ((O=fopen(cksumname,"w")) != NULL)
 668                                 {
 669                                 CKSUM_OUT=O;
 670                                 l=1;
 671                                 }
 672                         }
 673                 for (i=0; i<8; i++)
 674                         fprintf(CKSUM_OUT,"%02X",cksum[i]);
 675                 fprintf(CKSUM_OUT,"\n");
 676                 if (l) fclose(CKSUM_OUT);
 677                 }
 678 problems:
 679         memset(buf,0,sizeof(buf));
 680         memset(obuf,0,sizeof(obuf));
 681         memset(ks,0,sizeof(ks));
 682         memset(ks2,0,sizeof(ks2));
 683         memset(iv,0,sizeof(iv));
 684         memset(iv2,0,sizeof(iv2));
 685         memset(kk,0,sizeof(kk));
 686         memset(k2,0,sizeof(k2));
 687         memset(uubuf,0,sizeof(uubuf));
 688         memset(b,0,sizeof(b));
 689         memset(bb,0,sizeof(bb));
 690         memset(cksum,0,sizeof(cksum));
 691         if (Exit) EXIT(Exit);
 692         }
 693
 694 int uufwrite(data, size, num, fp)
 695 unsigned char *data;
 696 int size;
 697 unsigned int num;
 698 FILE *fp;
 699
 700      /* We ignore this parameter but it should be > ~50 I believe */
 701
 702
 703         {
 704         int i,j,left,rem,ret=num;
 705         static int start=1;
 706
 707         if (start)
 708                 {
 709                 fprintf(fp,"begin 600 %s\n",
 710                         (uuname[0] == '\0')?"text.d":uuname);
 711                 start=0;
 712                 }
 713
 714         if (uubufnum)
 715                 {
 716                 if (uubufnum+num < 45)
 717                         {
 718                         memcpy(&(uubuf[uubufnum]),data,(unsigned int)num);
 719                         uubufnum+=num;
 720                         return(num);
 721                         }
 722                 else
 723                         {
 724                         i=45-uubufnum;
 725                         memcpy(&(uubuf[uubufnum]),data,(unsigned int)i);
 726                         j=uuencode((unsigned char *)uubuf,45,b);
 727                         fwrite(b,1,(unsigned int)j,fp);
 728                         uubufnum=0;
 729                         data+=i;
 730                         num-=i;
 731                         }
 732                 }
 733
 734         for (i=0; i<(((int)num)-INUUBUFN); i+=INUUBUFN)
 735                 {
 736                 j=uuencode(&(data[i]),INUUBUFN,b);
 737                 fwrite(b,1,(unsigned int)j,fp);
 738                 }
 739         rem=(num-i)%45;
 740         left=(num-i-rem);
 741         if (left)
 742                 {
 743                 j=uuencode(&(data[i]),left,b);
 744                 fwrite(b,1,(unsigned int)j,fp);
 745                 i+=left;
 746                 }
 747         if (i != num)
 748                 {
 749                 memcpy(uubuf,&(data[i]),(unsigned int)rem);
 750                 uubufnum=rem;
 751                 }
 752         return(ret);
 753         }
 754
 755 void uufwriteEnd(fp)
 756 FILE *fp;
 757         {
 758         int j;
 759         static const char *end=" \nend\n";
 760
 761         if (uubufnum != 0)
 762                 {
 763                 uubuf[uubufnum]='\0';
 764                 uubuf[uubufnum+1]='\0';
 765                 uubuf[uubufnum+2]='\0';
 766                 j=uuencode(uubuf,uubufnum,b);
 767                 fwrite(b,1,(unsigned int)j,fp);
 768                 }
 769         fwrite(end,1,strlen(end),fp);
 770         }
 771
 772 int uufread(out, size, num, fp)
 773 unsigned char *out;
 774 int size; /* should always be > ~ 60; I actually ignore this parameter :-) */
 775 unsigned int num;
 776 FILE *fp;
 777         {
 778         int i,j,tot;
 779         static int done=0;
 780         static int valid=0;
 781         static int start=1;
 782
 783         if (start)
 784                 {
 785                 for (;;)
 786                         {
 787                         b[0]='\0';
 788                         fgets((char *)b,300,fp);
 789                         if (b[0] == '\0')
 790                                 {
 791                                 fprintf(stderr,"no 'begin' found in uuencoded input\n");
 792                                 return(-1);
 793                                 }
 794                         if (strncmp((char *)b,"begin ",6) == 0) break;
 795                         }
 796                 start=0;
 797                 }
 798         if (done) return(0);
 799         tot=0;
 800         if (valid)
 801                 {
 802                 memcpy(out,bb,(unsigned int)valid);
 803                 tot=valid;
 804                 valid=0;
 805                 }
 806         for (;;)
 807                 {
 808                 b[0]='\0';
 809                 fgets((char *)b,300,fp);
 810                 if (b[0] == '\0') break;
 811                 i=strlen((char *)b);
 812                 if ((b[0] == 'e') && (b[1] == 'n') && (b[2] == 'd'))
 813                         {
 814                         done=1;
 815                         while (!feof(fp))
 816                                 {
 817                                 fgets((char *)b,300,fp);
 818                                 }
 819                         break;
 820                         }
 821                 i=uudecode(b,i,bb);
 822                 if (i < 0) break;
 823                 if ((i+tot+8) > num)
 824                         {
 825                         /* num to copy to make it a multiple of 8 */
 826                         j=(num/8*8)-tot-8;
 827                         memcpy(&(out[tot]),bb,(unsigned int)j);
 828                         tot+=j;
 829                         memcpy(bb,&(bb[j]),(unsigned int)i-j);
 830                         valid=i-j;
 831                         break;
 832                         }
 833                 memcpy(&(out[tot]),bb,(unsigned int)i);
 834                 tot+=i;
 835                 }
 836         return(tot);
 837         }
 838
 839 #define ccc2l(c,l)      (l =((DES_LONG)(*((c)++)))<<16, \
 840                          l|=((DES_LONG)(*((c)++)))<< 8, \
 841                          l|=((DES_LONG)(*((c)++))))
 842
 843 #define l2ccc(l,c)      (*((c)++)=(unsigned char)(((l)>>16)&0xff), \
 844                     *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
 845                     *((c)++)=(unsigned char)(((l)    )&0xff))
 846
 847
 848 int uuencode(in, num, out)
 849 unsigned char *in;
 850 int num;
 851 unsigned char *out;
 852         {
 853         int j,i,n,tot=0;
 854         DES_LONG l;
 855         register unsigned char *p;
 856         p=out;
 857
 858         for (j=0; j<num; j+=45)
 859                 {
 860                 if (j+45 > num)
 861                         i=(num-j);
 862                 else    i=45;
 863                 *(p++)=i+' ';
 864                 for (n=0; n<i; n+=3)
 865                         {
 866                         ccc2l(in,l);
 867                         *(p++)=((l>>18)&0x3f)+' ';
 868                         *(p++)=((l>>12)&0x3f)+' ';
 869                         *(p++)=((l>> 6)&0x3f)+' ';
 870                         *(p++)=((l    )&0x3f)+' ';
 871                         tot+=4;
 872                         }
 873                 *(p++)='\n';
 874                 tot+=2;
 875                 }
 876         *p='\0';
 877         l=0;
 878         return(tot);
 879         }
 880
 881 int uudecode(in, num, out)
 882 unsigned char *in;
 883 int num;
 884 unsigned char *out;
 885         {
 886         int j,i,k;
 887         unsigned int n=0,space=0;
 888         DES_LONG l;
 889         DES_LONG w,x,y,z;
 890         unsigned int blank=(unsigned int)'\n'-' ';
 891
 892         for (j=0; j<num; )
 893                 {
 894                 n= *(in++)-' ';
 895                 if (n == blank)
 896                         {
 897                         n=0;
 898                         in--;
 899                         }
 900                 if (n > 60)
 901                         {
 902                         fprintf(stderr,"uuencoded line length too long\n");
 903                         return(-1);
 904                         }
 905                 j++;
 906
 907                 for (i=0; i<n; j+=4,i+=3)
 908                         {
 909                         /* the following is for cases where spaces are
 910                          * removed from lines.
 911                          */
 912                         if (space)
 913                                 {
 914                                 w=x=y=z=0;
 915                                 }
 916                         else
 917                                 {
 918                                 w= *(in++)-' ';
 919                                 x= *(in++)-' ';
 920                                 y= *(in++)-' ';
 921                                 z= *(in++)-' ';
 922                                 }
 923                         if ((w > 63) || (x > 63) || (y > 63) || (z > 63))
 924                                 {
 925                                 k=0;
 926                                 if (w == blank) k=1;
 927                                 if (x == blank) k=2;
 928                                 if (y == blank) k=3;
 929                                 if (z == blank) k=4;
 930                                 space=1;
 931                                 switch (k) {
 932                                 case 1: w=0; in--;
 933                                 case 2: x=0; in--;
 934                                 case 3: y=0; in--;
 935                                 case 4: z=0; in--;
 936                                         break;
 937                                 case 0:
 938                                         space=0;
 939                                         fprintf(stderr,"bad uuencoded data values\n");
 940                                         w=x=y=z=0;
 941                                         return(-1);
 942                                         break;
 943                                         }
 944                                 }
 945                         l=(w<<18)|(x<<12)|(y<< 6)|(z    );
 946                         l2ccc(l,out);
 947                         }
 948                 if (*(in++) != '\n')
 949                         {
 950                         fprintf(stderr,"missing nl in uuencoded line\n");
 951                         w=x=y=z=0;
 952                         return(-1);
 953                         }
 954                 j++;
 955                 }
 956         *out='\0';
 957         w=x=y=z=0;
 958         return(n);
 959         }