crypto/des/des.c

   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 #ifndef MSDOS
  62 #include <unistd.h>
  63 #else
  64 #include <io.h>
  65 #define RAND
  66 #endif
  67
  68 #include <time.h>
  69 #include "des_ver.h"
  70
  71 #ifdef VMS
  72 #include <types.h>
  73 #include <stat.h>
  74 #else
  75 #ifndef _IRIX
  76 #include <sys/types.h>
  77 #endif
  78 #include <sys/stat.h>
  79 #endif
  80 #if defined(NOCONST)
  81 #define const
  82 #endif
  83 #include "des.h"
  84
  85 #if defined(__STDC__) || defined(VMS) || defined(M_XENIX) || defined(MSDOS)
  86 #include <string.h>
  87 #endif
  88
  89 #ifdef RAND
  90 #define random rand
  91 #define srandom(s) srand(s)
  92 #endif
  93
  94 #ifndef NOPROTO
  95 void usage(void);
  96 void doencryption(void);
  97 int uufwrite(unsigned char *data, int size, unsigned int num, FILE *fp);
  98 void uufwriteEnd(FILE *fp);
  99 int uufread(unsigned char *out,int size,unsigned int num,FILE *fp);
 100 int uuencode(unsigned char *in,int num,unsigned char *out);
 101 int uudecode(unsigned char *in,int num,unsigned char *out);
 102 void des_3cbc_encrypt(des_cblock *input,des_cblock *output,long length,
 103         des_key_schedule sk1,des_key_schedule sk2,
 104         des_cblock *ivec1,des_cblock *ivec2,int enc);
 105 #else
 106 void usage();
 107 void doencryption();
 108 int uufwrite();
 109 void uufwriteEnd();
 110 int uufread();
 111 int uuencode();
 112 int uudecode();
 113 void des_3cbc_encrypt();
 114 #endif
 115
 116 #ifdef VMS
 117 #define EXIT(a) exit(a&0x10000000L)
 118 #else
 119 #define EXIT(a) exit(a)
 120 #endif
 121
 122 #define BUFSIZE (8*1024)
 123 #define VERIFY  1
 124 #define KEYSIZ  8
 125 #define KEYSIZB 1024 /* should hit tty line limit first :-) */
 126 char key[KEYSIZB+1];
 127 int do_encrypt,longk=0;
 128 FILE *DES_IN,*DES_OUT,*CKSUM_OUT;
 129 char uuname[200];
 130 unsigned char uubuf[50];
 131 int uubufnum=0;
 132 #define INUUBUFN        (45*100)
 133 #define OUTUUBUF        (65*100)
 134 unsigned char b[OUTUUBUF];
 135 unsigned char bb[300];
 136 des_cblock cksum={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
 137 char cksumname[200]="";
 138
 139 int vflag,cflag,eflag,dflag,kflag,bflag,fflag,sflag,uflag,flag3,hflag,error;
 140
 141 int main(int argc, char **argv)
 142         {
 143         int i;
 144         struct stat ins,outs;
 145         char *p;
 146         char *in=NULL,*out=NULL;
 147
 148         vflag=cflag=eflag=dflag=kflag=hflag=bflag=fflag=sflag=uflag=flag3=0;
 149         error=0;
 150         memset(key,0,sizeof(key));
 151
 152         for (i=1; i<argc; i++)
 153                 {
 154                 p=argv[i];
 155                 if ((p[0] == '-') && (p[1] != '\0'))
 156                         {
 157                         p++;
 158                         while (*p)
 159                                 {
 160                                 switch (*(p++))
 161                                         {
 162                                 case '3':
 163                                         flag3=1;
 164                                         longk=1;
 165                                         break;
 166                                 case 'c':
 167                                         cflag=1;
 168                                         strncpy(cksumname,p,200);
 169                                         p+=strlen(cksumname);
 170                                         break;
 171                                 case 'C':
 172                                         cflag=1;
 173                                         longk=1;
 174                                         strncpy(cksumname,p,200);
 175                                         p+=strlen(cksumname);
 176                                         break;
 177                                 case 'e':
 178                                         eflag=1;
 179                                         break;
 180                                 case 'v':
 181                                         vflag=1;
 182                                         break;
 183                                 case 'E':
 184                                         eflag=1;
 185                                         longk=1;
 186                                         break;
 187                                 case 'd':
 188                                         dflag=1;
 189                                         break;
 190                                 case 'D':
 191                                         dflag=1;
 192                                         longk=1;
 193                                         break;
 194                                 case 'b':
 195                                         bflag=1;
 196                                         break;
 197                                 case 'f':
 198                                         fflag=1;
 199                                         break;
 200                                 case 's':
 201                                         sflag=1;
 202                                         break;
 203                                 case 'u':
 204                                         uflag=1;
 205                                         strncpy(uuname,p,200);
 206                                         p+=strlen(uuname);
 207                                         break;
 208                                 case 'h':
 209                                         hflag=1;
 210                                         break;
 211                                 case 'k':
 212                                         kflag=1;
 213                                         if ((i+1) == argc)
 214                                                 {
 215                                                 fputs("must have a key with the -k option\n",stderr);
 216                                                 error=1;
 217                                                 }
 218                                         else
 219                                                 {
 220                                                 int j;
 221
 222                                                 i++;
 223                                                 strncpy(key,argv[i],KEYSIZB);
 224                                                 for (j=strlen(argv[i])-1; j>=0; j--)
 225                                                         argv[i][j]='\0';
 226                                                 }
 227                                         break;
 228                                 default:
 229                                         fprintf(stderr,"'%c' unknown flag\n",p[-1]);
 230                                         error=1;
 231                                         break;
 232                                         }
 233                                 }
 234                         }
 235                 else
 236                         {
 237                         if (in == NULL)
 238                                 in=argv[i];
 239                         else if (out == NULL)
 240                                 out=argv[i];
 241                         else
 242                                 error=1;
 243                         }
 244                 }
 245         if (error) usage();
 246         /* We either
 247          * do checksum or
 248          * do encrypt or
 249          * do decrypt or
 250          * do decrypt then ckecksum or
 251          * do checksum then encrypt
 252          */
 253         if (((eflag+dflag) == 1) || cflag)
 254                 {
 255                 if (eflag) do_encrypt=DES_ENCRYPT;
 256                 if (dflag) do_encrypt=DES_DECRYPT;
 257                 }
 258         else
 259                 {
 260                 if (vflag)
 261                         {
 262 #ifndef _Windows
 263                         fprintf(stderr,"des(1) built with %s\n",libdes_version);
 264 #endif
 265                         EXIT(1);
 266                         }
 267                 else usage();
 268                 }
 269
 270 #ifndef _Windows
 271         if (vflag) fprintf(stderr,"des(1) built with %s\n",libdes_version);
 272 #endif
 273         if (    (in != NULL) &&
 274                 (out != NULL) &&
 275 #ifndef MSDOS
 276                 (stat(in,&ins) != -1) &&
 277                 (stat(out,&outs) != -1) &&
 278                 (ins.st_dev == outs.st_dev) &&
 279                 (ins.st_ino == outs.st_ino))
 280 #else /* MSDOS */
 281                 (strcmp(in,out) == 0))
 282 #endif
 283                         {
 284                         fputs("input and output file are the same\n",stderr);
 285                         EXIT(3);
 286                         }
 287
 288         if (!kflag)
 289                 if (des_read_pw_string(key,KEYSIZB+1,"Enter key:",eflag?VERIFY:0))
 290                         {
 291                         fputs("password error\n",stderr);
 292                         EXIT(2);
 293                         }
 294
 295         if (in == NULL)
 296                 DES_IN=stdin;
 297         else if ((DES_IN=fopen(in,"r")) == NULL)
 298                 {
 299                 perror("opening input file");
 300                 EXIT(4);
 301                 }
 302
 303         CKSUM_OUT=stdout;
 304         if (out == NULL)
 305                 {
 306                 DES_OUT=stdout;
 307                 CKSUM_OUT=stderr;
 308                 }
 309         else if ((DES_OUT=fopen(out,"w")) == NULL)
 310                 {
 311                 perror("opening output file");
 312                 EXIT(5);
 313                 }
 314
 315 #ifdef MSDOS
 316         /* This should set the file to binary mode. */
 317         {
 318 #include <fcntl.h>
 319         if (!(uflag && dflag))
 320                 setmode(fileno(DES_IN),O_BINARY);
 321         if (!(uflag && eflag))
 322                 setmode(fileno(DES_OUT),O_BINARY);
 323         }
 324 #endif
 325
 326         doencryption();
 327         fclose(DES_IN);
 328         fclose(DES_OUT);
 329         EXIT(0);
 330         }
 331
 332 void usage(void)
 333         {
 334         char **u;
 335         static const char *Usage[]={
 336 "des <options> [input-file [output-file]]",
 337 "options:",
 338 "-v         : des(1) version number",
 339 "-e         : encrypt using sunOS compatible user key to DES key conversion.",
 340 "-E         : encrypt ",
 341 "-d         : decrypt using sunOS compatible user key to DES key conversion.",
 342 "-D         : decrypt ",
 343 "-c[ckname] : generate a cbc_cksum using sunOS compatible user key to",
 344 "             DES key conversion and output to ckname (stdout default,",
 345 "             stderr if data being output on stdout).  The checksum is",
 346 "             generated before encryption and after decryption if used",
 347 "             in conjunction with -[eEdD].",
 348 "-C[ckname] : generate a cbc_cksum as for -c but compatible with -[ED].",
 349 "-k key     : use key 'key'",
 350 "-h         : the key that is entered will be a hexidecimal number",
 351 "             that is used directly as the des key",
 352 "-u[uuname] : input file is uudecoded if -[dD] or output uuencoded data if -[eE]",
 353 "             (uuname is the filename to put in the uuencode header).",
 354 "-b         : encrypt using DES in ecb encryption mode, the defaut is cbc mode.",
 355 "-3         : encrypt using tripple DES encryption.  This uses 2 keys",
 356 "             generated from the input key.  If the input key is less",
 357 "             than 8 characters long, this is equivelent to normal",
 358 "             encryption.  Default is triple cbc, -b makes it triple ecb.",
 359 NULL
 360 };
 361         for (u=(char **)Usage; *u; u++)
 362                 {
 363                 fputs(*u,stderr);
 364                 fputc('\n',stderr);
 365                 }
 366
 367         EXIT(1);
 368         }
 369
 370 void doencryption(void)
 371         {
 372 #ifdef _LIBC
 373         extern int srandom();
 374         extern int random();
 375         extern unsigned long time();
 376 #endif
 377
 378         register int i;
 379         des_key_schedule ks,ks2;
 380         unsigned char iv[8],iv2[8];
 381         char *p;
 382         int num=0,j,k,l,rem,ll,len,last,ex=0;
 383         des_cblock kk,k2;
 384         FILE *O;
 385         int Exit=0;
 386 #ifndef MSDOS
 387         static unsigned char buf[BUFSIZE+8],obuf[BUFSIZE+8];
 388 #else
 389         static unsigned char *buf=NULL,*obuf=NULL;
 390
 391         if (buf == NULL)
 392                 {
 393                 if (    (( buf=(unsigned char *)Malloc(BUFSIZE+8)) == NULL) ||
 394                         ((obuf=(unsigned char *)Malloc(BUFSIZE+8)) == NULL))
 395                         {
 396                         fputs("Not enough memory\n",stderr);
 397                         Exit=10;
 398                         goto problems;
 399                         }
 400                 }
 401 #endif
 402
 403         if (hflag)
 404                 {
 405                 j=(flag3?16:8);
 406                 p=key;
 407                 for (i=0; i<j; i++)
 408                         {
 409                         k=0;
 410                         if ((*p <= '9') && (*p >= '0'))
 411                                 k=(*p-'0')<<4;
 412                         else if ((*p <= 'f') && (*p >= 'a'))
 413                                 k=(*p-'a'+10)<<4;
 414                         else if ((*p <= 'F') && (*p >= 'A'))
 415                                 k=(*p-'A'+10)<<4;
 416                         else
 417                                 {
 418                                 fputs("Bad hex key\n",stderr);
 419                                 Exit=9;
 420                                 goto problems;
 421                                 }
 422                         p++;
 423                         if ((*p <= '9') && (*p >= '0'))
 424                                 k|=(*p-'0');
 425                         else if ((*p <= 'f') && (*p >= 'a'))
 426                                 k|=(*p-'a'+10);
 427                         else if ((*p <= 'F') && (*p >= 'A'))
 428                                 k|=(*p-'A'+10);
 429                         else
 430                                 {
 431                                 fputs("Bad hex key\n",stderr);
 432                                 Exit=9;
 433                                 goto problems;
 434                                 }
 435                         p++;
 436                         if (i < 8)
 437                                 kk[i]=k;
 438                         else
 439                                 k2[i-8]=k;
 440                         }
 441                 des_set_key((C_Block *)k2,ks2);
 442                 memset(k2,0,sizeof(k2));
 443                 }
 444         else if (longk || flag3)
 445                 {
 446                 if (flag3)
 447                         {
 448                         des_string_to_2keys(key,(C_Block *)kk,(C_Block *)k2);
 449                         des_set_key((C_Block *)k2,ks2);
 450                         memset(k2,0,sizeof(k2));
 451                         }
 452                 else
 453                         des_string_to_key(key,(C_Block *)kk);
 454                 }
 455         else
 456                 for (i=0; i<KEYSIZ; i++)
 457                         {
 458                         l=0;
 459                         k=key[i];
 460                         for (j=0; j<8; j++)
 461                                 {
 462                                 if (k&1) l++;
 463                                 k>>=1;
 464                                 }
 465                         if (l & 1)
 466                                 kk[i]=key[i]&0x7f;
 467                         else
 468                                 kk[i]=key[i]|0x80;
 469                         }
 470
 471         des_set_key((C_Block *)kk,ks);
 472         memset(key,0,sizeof(key));
 473         memset(kk,0,sizeof(kk));
 474         /* woops - A bug that does not showup under unix :-( */
 475         memset(iv,0,sizeof(iv));
 476         memset(iv2,0,sizeof(iv2));
 477
 478         l=1;
 479         rem=0;
 480         /* first read */
 481         if (eflag || (!dflag && cflag))
 482                 {
 483                 for (;;)
 484                         {
 485                         num=l=fread(&(buf[rem]),1,BUFSIZE,DES_IN);
 486                         l+=rem;
 487                         num+=rem;
 488                         if (l < 0)
 489                                 {
 490                                 perror("read error");
 491                                 Exit=6;
 492                                 goto problems;
 493                                 }
 494
 495                         rem=l%8;
 496                         len=l-rem;
 497                         if (feof(DES_IN))
 498                                 {
 499                                 srandom((unsigned int)time(NULL));
 500                                 for (i=7-rem; i>0; i--)
 501                                         buf[l++]=random()&0xff;
 502                                 buf[l++]=rem;
 503                                 ex=1;
 504                                 len+=rem;
 505                                 }
 506                         else
 507                                 l-=rem;
 508
 509                         if (cflag)
 510                                 {
 511                                 des_cbc_cksum((C_Block *)buf,(C_Block *)cksum,
 512                                         (long)len,ks,(C_Block *)cksum);
 513                                 if (!eflag)
 514                                         {
 515                                         if (feof(DES_IN)) break;
 516                                         else continue;
 517                                         }
 518                                 }
 519
 520                         if (bflag && !flag3)
 521                                 for (i=0; i<l; i+=8)
 522                                         des_ecb_encrypt(
 523                                                 (des_cblock *)&(buf[i]),
 524                                                 (des_cblock *)&(obuf[i]),
 525                                                 ks,do_encrypt);
 526                         else if (flag3 && bflag)
 527                                 for (i=0; i<l; i+=8)
 528                                         des_ecb2_encrypt(
 529                                                 (des_cblock *)&(buf[i]),
 530                                                 (des_cblock *)&(obuf[i]),
 531                                                 ks,ks2,do_encrypt);
 532                         else if (flag3 && !bflag)
 533                                 {
 534                                 char tmpbuf[8];
 535
 536                                 if (rem) memcpy(tmpbuf,&(buf[l]),
 537                                         (unsigned int)rem);
 538                                 des_3cbc_encrypt(
 539                                         (des_cblock *)buf,(des_cblock *)obuf,
 540                                         (long)l,ks,ks2,(des_cblock *)iv,
 541                                         (des_cblock *)iv2,do_encrypt);
 542                                 if (rem) memcpy(&(buf[l]),tmpbuf,
 543                                         (unsigned int)rem);
 544                                 }
 545                         else
 546                                 {
 547                                 des_cbc_encrypt(
 548                                         (des_cblock *)buf,(des_cblock *)obuf,
 549                                         (long)l,ks,(des_cblock *)iv,do_encrypt);
 550                                 if (l >= 8) memcpy(iv,&(obuf[l-8]),8);
 551                                 }
 552                         if (rem) memcpy(buf,&(buf[l]),(unsigned int)rem);
 553
 554                         i=0;
 555                         while (i < l)
 556                                 {
 557                                 if (uflag)
 558                                         j=uufwrite(obuf,1,(unsigned int)l-i,
 559                                                 DES_OUT);
 560                                 else
 561                                         j=fwrite(obuf,1,(unsigned int)l-i,
 562                                                 DES_OUT);
 563                                 if (j == -1)
 564                                         {
 565                                         perror("Write error");
 566                                         Exit=7;
 567                                         goto problems;
 568                                         }
 569                                 i+=j;
 570                                 }
 571                         if (feof(DES_IN))
 572                                 {
 573                                 if (uflag) uufwriteEnd(DES_OUT);
 574                                 break;
 575                                 }
 576                         }
 577                 }
 578         else /* decrypt */
 579                 {
 580                 ex=1;
 581                 for (;;)
 582                         {
 583                         if (ex) {
 584                                 if (uflag)
 585                                         l=uufread(buf,1,BUFSIZE,DES_IN);
 586                                 else
 587                                         l=fread(buf,1,BUFSIZE,DES_IN);
 588                                 ex=0;
 589                                 rem=l%8;
 590                                 l-=rem;
 591                                 }
 592                         if (l < 0)
 593                                 {
 594                                 perror("read error");
 595                                 Exit=6;
 596                                 goto problems;
 597                                 }
 598
 599                         if (bflag && !flag3)
 600                                 for (i=0; i<l; i+=8)
 601                                         des_ecb_encrypt(
 602                                                 (des_cblock *)&(buf[i]),
 603                                                 (des_cblock *)&(obuf[i]),
 604                                                 ks,do_encrypt);
 605                         else if (flag3 && bflag)
 606                                 for (i=0; i<l; i+=8)
 607                                         des_ecb2_encrypt(
 608                                                 (des_cblock *)&(buf[i]),
 609                                                 (des_cblock *)&(obuf[i]),
 610                                                 ks,ks2,do_encrypt);
 611                         else if (flag3 && !bflag)
 612                                 {
 613                                 des_3cbc_encrypt(
 614                                         (des_cblock *)buf,(des_cblock *)obuf,
 615                                         (long)l,ks,ks2,(des_cblock *)iv,
 616                                         (des_cblock *)iv2,do_encrypt);
 617                                 }
 618                         else
 619                                 {
 620                                 des_cbc_encrypt(
 621                                         (des_cblock *)buf,(des_cblock *)obuf,
 622                                         (long)l,ks,(des_cblock *)iv,do_encrypt);
 623                                 if (l >= 8) memcpy(iv,&(buf[l-8]),8);
 624                                 }
 625
 626                         if (uflag)
 627                                 ll=uufread(&(buf[rem]),1,BUFSIZE,DES_IN);
 628                         else
 629                                 ll=fread(&(buf[rem]),1,BUFSIZE,DES_IN);
 630                         ll+=rem;
 631                         rem=ll%8;
 632                         ll-=rem;
 633                         if (feof(DES_IN) && (ll == 0))
 634                                 {
 635                                 last=obuf[l-1];
 636
 637                                 if ((last > 7) || (last < 0))
 638                                         {
 639                                         fputs("The file was not decrypted correctly.\n",
 640                                                 stderr);
 641                                         Exit=8;
 642                                         last=0;
 643                                         }
 644                                 l=l-8+last;
 645                                 }
 646                         i=0;
 647                         if (cflag) des_cbc_cksum((C_Block *)obuf,
 648                                 (C_Block *)cksum,(long)l/8*8,ks,
 649                                 (C_Block *)cksum);
 650                         while (i != l)
 651                                 {
 652                                 j=fwrite(obuf,1,(unsigned int)l-i,DES_OUT);
 653                                 if (j == -1)
 654                                         {
 655                                         perror("Write error");
 656                                         Exit=7;
 657                                         goto problems;
 658                                         }
 659                                 i+=j;
 660                                 }
 661                         l=ll;
 662                         if ((l == 0) && feof(DES_IN)) break;
 663                         }
 664                 }
 665         if (cflag)
 666                 {
 667                 l=0;
 668                 if (cksumname[0] != '\0')
 669                         {
 670                         if ((O=fopen(cksumname,"w")) != NULL)
 671                                 {
 672                                 CKSUM_OUT=O;
 673                                 l=1;
 674                                 }
 675                         }
 676                 for (i=0; i<8; i++)
 677                         fprintf(CKSUM_OUT,"%02X",cksum[i]);
 678                 fprintf(CKSUM_OUT,"\n");
 679                 if (l) fclose(CKSUM_OUT);
 680                 }
 681 problems:
 682         memset(buf,0,sizeof(buf));
 683         memset(obuf,0,sizeof(obuf));
 684         memset(ks,0,sizeof(ks));
 685         memset(ks2,0,sizeof(ks2));
 686         memset(iv,0,sizeof(iv));
 687         memset(iv2,0,sizeof(iv2));
 688         memset(kk,0,sizeof(kk));
 689         memset(k2,0,sizeof(k2));
 690         memset(uubuf,0,sizeof(uubuf));
 691         memset(b,0,sizeof(b));
 692         memset(bb,0,sizeof(bb));
 693         memset(cksum,0,sizeof(cksum));
 694         if (Exit) EXIT(Exit);
 695         }
 696
 697 /*    We ignore this parameter but it should be > ~50 I believe    */
 698 int uufwrite(unsigned char *data, int size, unsigned int num, FILE *fp)
 699         {
 700         int i,j,left,rem,ret=num;
 701         static int start=1;
 702
 703         if (start)
 704                 {
 705                 fprintf(fp,"begin 600 %s\n",
 706                         (uuname[0] == '\0')?"text.d":uuname);
 707                 start=0;
 708                 }
 709
 710         if (uubufnum)
 711                 {
 712                 if (uubufnum+num < 45)
 713                         {
 714                         memcpy(&(uubuf[uubufnum]),data,(unsigned int)num);
 715                         uubufnum+=num;
 716                         return(num);
 717                         }
 718                 else
 719                         {
 720                         i=45-uubufnum;
 721                         memcpy(&(uubuf[uubufnum]),data,(unsigned int)i);
 722                         j=uuencode((unsigned char *)uubuf,45,b);
 723                         fwrite(b,1,(unsigned int)j,fp);
 724                         uubufnum=0;
 725                         data+=i;
 726                         num-=i;
 727                         }
 728                 }
 729
 730         for (i=0; i<(((int)num)-INUUBUFN); i+=INUUBUFN)
 731                 {
 732                 j=uuencode(&(data[i]),INUUBUFN,b);
 733                 fwrite(b,1,(unsigned int)j,fp);
 734                 }
 735         rem=(num-i)%45;
 736         left=(num-i-rem);
 737         if (left)
 738                 {
 739                 j=uuencode(&(data[i]),left,b);
 740                 fwrite(b,1,(unsigned int)j,fp);
 741                 i+=left;
 742                 }
 743         if (i != num)
 744                 {
 745                 memcpy(uubuf,&(data[i]),(unsigned int)rem);
 746                 uubufnum=rem;
 747                 }
 748         return(ret);
 749         }
 750
 751 void uufwriteEnd(FILE *fp)
 752         {
 753         int j;
 754         static const char *end=" \nend\n";
 755
 756         if (uubufnum != 0)
 757                 {
 758                 uubuf[uubufnum]='\0';
 759                 uubuf[uubufnum+1]='\0';
 760                 uubuf[uubufnum+2]='\0';
 761                 j=uuencode(uubuf,uubufnum,b);
 762                 fwrite(b,1,(unsigned int)j,fp);
 763                 }
 764         fwrite(end,1,strlen(end),fp);
 765         }
 766
 767 /* int size:  should always be > ~ 60; I actually ignore this parameter :-)    */
 768 int uufread(unsigned char *out, int size, unsigned int num, FILE *fp)
 769         {
 770         int i,j,tot;
 771         static int done=0;
 772         static int valid=0;
 773         static int start=1;
 774
 775         if (start)
 776                 {
 777                 for (;;)
 778                         {
 779                         b[0]='\0';
 780                         fgets((char *)b,300,fp);
 781                         if (b[0] == '\0')
 782                                 {
 783                                 fprintf(stderr,"no 'begin' found in uuencoded input\n");
 784                                 return(-1);
 785                                 }
 786                         if (strncmp((char *)b,"begin ",6) == 0) break;
 787                         }
 788                 start=0;
 789                 }
 790         if (done) return(0);
 791         tot=0;
 792         if (valid)
 793                 {
 794                 memcpy(out,bb,(unsigned int)valid);
 795                 tot=valid;
 796                 valid=0;
 797                 }
 798         for (;;)
 799                 {
 800                 b[0]='\0';
 801                 fgets((char *)b,300,fp);
 802                 if (b[0] == '\0') break;
 803                 i=strlen((char *)b);
 804                 if ((b[0] == 'e') && (b[1] == 'n') && (b[2] == 'd'))
 805                         {
 806                         done=1;
 807                         while (!feof(fp))
 808                                 {
 809                                 fgets((char *)b,300,fp);
 810                                 }
 811                         break;
 812                         }
 813                 i=uudecode(b,i,bb);
 814                 if (i < 0) break;
 815                 if ((i+tot+8) > num)
 816                         {
 817                         /* num to copy to make it a multiple of 8 */
 818                         j=(num/8*8)-tot-8;
 819                         memcpy(&(out[tot]),bb,(unsigned int)j);
 820                         tot+=j;
 821                         memcpy(bb,&(bb[j]),(unsigned int)i-j);
 822                         valid=i-j;
 823                         break;
 824                         }
 825                 memcpy(&(out[tot]),bb,(unsigned int)i);
 826                 tot+=i;
 827                 }
 828         return(tot);
 829         }
 830
 831 #define ccc2l(c,l)      (l =((DES_LONG)(*((c)++)))<<16, \
 832                          l|=((DES_LONG)(*((c)++)))<< 8, \
 833                          l|=((DES_LONG)(*((c)++))))
 834
 835 #define l2ccc(l,c)      (*((c)++)=(unsigned char)(((l)>>16)&0xff), \
 836                     *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
 837                     *((c)++)=(unsigned char)(((l)    )&0xff))
 838
 839
 840 int uuencode(unsigned char *in, int num, unsigned char *out)
 841         {
 842         int j,i,n,tot=0;
 843         DES_LONG l;
 844         register unsigned char *p;
 845         p=out;
 846
 847         for (j=0; j<num; j+=45)
 848                 {
 849                 if (j+45 > num)
 850                         i=(num-j);
 851                 else    i=45;
 852                 *(p++)=i+' ';
 853                 for (n=0; n<i; n+=3)
 854                         {
 855                         ccc2l(in,l);
 856                         *(p++)=((l>>18)&0x3f)+' ';
 857                         *(p++)=((l>>12)&0x3f)+' ';
 858                         *(p++)=((l>> 6)&0x3f)+' ';
 859                         *(p++)=((l    )&0x3f)+' ';
 860                         tot+=4;
 861                         }
 862                 *(p++)='\n';
 863                 tot+=2;
 864                 }
 865         *p='\0';
 866         l=0;
 867         return(tot);
 868         }
 869
 870 int uudecode(unsigned char *in, int num, unsigned char *out)
 871         {
 872         int j,i,k;
 873         unsigned int n=0,space=0;
 874         DES_LONG l;
 875         DES_LONG w,x,y,z;
 876         unsigned int blank=(unsigned int)'\n'-' ';
 877
 878         for (j=0; j<num; )
 879                 {
 880                 n= *(in++)-' ';
 881                 if (n == blank)
 882                         {
 883                         n=0;
 884                         in--;
 885                         }
 886                 if (n > 60)
 887                         {
 888                         fprintf(stderr,"uuencoded line length too long\n");
 889                         return(-1);
 890                         }
 891                 j++;
 892
 893                 for (i=0; i<n; j+=4,i+=3)
 894                         {
 895                         /* the following is for cases where spaces are
 896                          * removed from lines.
 897                          */
 898                         if (space)
 899                                 {
 900                                 w=x=y=z=0;
 901                                 }
 902                         else
 903                                 {
 904                                 w= *(in++)-' ';
 905                                 x= *(in++)-' ';
 906                                 y= *(in++)-' ';
 907                                 z= *(in++)-' ';
 908                                 }
 909                         if ((w > 63) || (x > 63) || (y > 63) || (z > 63))
 910                                 {
 911                                 k=0;
 912                                 if (w == blank) k=1;
 913                                 if (x == blank) k=2;
 914                                 if (y == blank) k=3;
 915                                 if (z == blank) k=4;
 916                                 space=1;
 917                                 switch (k) {
 918                                 case 1: w=0; in--;
 919                                 case 2: x=0; in--;
 920                                 case 3: y=0; in--;
 921                                 case 4: z=0; in--;
 922                                         break;
 923                                 case 0:
 924                                         space=0;
 925                                         fprintf(stderr,"bad uuencoded data values\n");
 926                                         w=x=y=z=0;
 927                                         return(-1);
 928                                         break;
 929                                         }
 930                                 }
 931                         l=(w<<18)|(x<<12)|(y<< 6)|(z    );
 932                         l2ccc(l,out);
 933                         }
 934                 if (*(in++) != '\n')
 935                         {
 936                         fprintf(stderr,"missing nl in uuencoded line\n");
 937                         w=x=y=z=0;
 938                         return(-1);
 939                         }
 940                 j++;
 941                 }
 942         *out='\0';
 943         w=x=y=z=0;
 944         return(n);
 945         }