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(argc, argv)
 142 int argc;
 143 char **argv;
 144         {
 145         int i;
 146         struct stat ins,outs;
 147         char *p;
 148         char *in=NULL,*out=NULL;
 149
 150         vflag=cflag=eflag=dflag=kflag=hflag=bflag=fflag=sflag=uflag=flag3=0;
 151         error=0;
 152         memset(key,0,sizeof(key));
 153
 154         for (i=1; i<argc; i++)
 155                 {
 156                 p=argv[i];
 157                 if ((p[0] == '-') && (p[1] != '\0'))
 158                         {
 159                         p++;
 160                         while (*p)
 161                                 {
 162                                 switch (*(p++))
 163                                         {
 164                                 case '3':
 165                                         flag3=1;
 166                                         longk=1;
 167                                         break;
 168                                 case 'c':
 169                                         cflag=1;
 170                                         strncpy(cksumname,p,200);
 171                                         p+=strlen(cksumname);
 172                                         break;
 173                                 case 'C':
 174                                         cflag=1;
 175                                         longk=1;
 176                                         strncpy(cksumname,p,200);
 177                                         p+=strlen(cksumname);
 178                                         break;
 179                                 case 'e':
 180                                         eflag=1;
 181                                         break;
 182                                 case 'v':
 183                                         vflag=1;
 184                                         break;
 185                                 case 'E':
 186                                         eflag=1;
 187                                         longk=1;
 188                                         break;
 189                                 case 'd':
 190                                         dflag=1;
 191                                         break;
 192                                 case 'D':
 193                                         dflag=1;
 194                                         longk=1;
 195                                         break;
 196                                 case 'b':
 197                                         bflag=1;
 198                                         break;
 199                                 case 'f':
 200                                         fflag=1;
 201                                         break;
 202                                 case 's':
 203                                         sflag=1;
 204                                         break;
 205                                 case 'u':
 206                                         uflag=1;
 207                                         strncpy(uuname,p,200);
 208                                         p+=strlen(uuname);
 209                                         break;
 210                                 case 'h':
 211                                         hflag=1;
 212                                         break;
 213                                 case 'k':
 214                                         kflag=1;
 215                                         if ((i+1) == argc)
 216                                                 {
 217                                                 fputs("must have a key with the -k option\n",stderr);
 218                                                 error=1;
 219                                                 }
 220                                         else
 221                                                 {
 222                                                 int j;
 223
 224                                                 i++;
 225                                                 strncpy(key,argv[i],KEYSIZB);
 226                                                 for (j=strlen(argv[i])-1; j>=0; j--)
 227                                                         argv[i][j]='\0';
 228                                                 }
 229                                         break;
 230                                 default:
 231                                         fprintf(stderr,"'%c' unknown flag\n",p[-1]);
 232                                         error=1;
 233                                         break;
 234                                         }
 235                                 }
 236                         }
 237                 else
 238                         {
 239                         if (in == NULL)
 240                                 in=argv[i];
 241                         else if (out == NULL)
 242                                 out=argv[i];
 243                         else
 244                                 error=1;
 245                         }
 246                 }
 247         if (error) usage();
 248         /* We either
 249          * do checksum or
 250          * do encrypt or
 251          * do decrypt or
 252          * do decrypt then ckecksum or
 253          * do checksum then encrypt
 254          */
 255         if (((eflag+dflag) == 1) || cflag)
 256                 {
 257                 if (eflag) do_encrypt=DES_ENCRYPT;
 258                 if (dflag) do_encrypt=DES_DECRYPT;
 259                 }
 260         else
 261                 {
 262                 if (vflag)
 263                         {
 264 #ifndef _Windows
 265                         fprintf(stderr,"des(1) built with %s\n",libdes_version);
 266 #endif
 267                         EXIT(1);
 268                         }
 269                 else usage();
 270                 }
 271
 272 #ifndef _Windows
 273         if (vflag) fprintf(stderr,"des(1) built with %s\n",libdes_version);
 274 #endif
 275         if (    (in != NULL) &&
 276                 (out != NULL) &&
 277 #ifndef MSDOS
 278                 (stat(in,&ins) != -1) &&
 279                 (stat(out,&outs) != -1) &&
 280                 (ins.st_dev == outs.st_dev) &&
 281                 (ins.st_ino == outs.st_ino))
 282 #else /* MSDOS */
 283                 (strcmp(in,out) == 0))
 284 #endif
 285                         {
 286                         fputs("input and output file are the same\n",stderr);
 287                         EXIT(3);
 288                         }
 289
 290         if (!kflag)
 291                 if (des_read_pw_string(key,KEYSIZB+1,"Enter key:",eflag?VERIFY:0))
 292                         {
 293                         fputs("password error\n",stderr);
 294                         EXIT(2);
 295                         }
 296
 297         if (in == NULL)
 298                 DES_IN=stdin;
 299         else if ((DES_IN=fopen(in,"r")) == NULL)
 300                 {
 301                 perror("opening input file");
 302                 EXIT(4);
 303                 }
 304
 305         CKSUM_OUT=stdout;
 306         if (out == NULL)
 307                 {
 308                 DES_OUT=stdout;
 309                 CKSUM_OUT=stderr;
 310                 }
 311         else if ((DES_OUT=fopen(out,"w")) == NULL)
 312                 {
 313                 perror("opening output file");
 314                 EXIT(5);
 315                 }
 316
 317 #ifdef MSDOS
 318         /* This should set the file to binary mode. */
 319         {
 320 #include <fcntl.h>
 321         if (!(uflag && dflag))
 322                 setmode(fileno(DES_IN),O_BINARY);
 323         if (!(uflag && eflag))
 324                 setmode(fileno(DES_OUT),O_BINARY);
 325         }
 326 #endif
 327
 328         doencryption();
 329         fclose(DES_IN);
 330         fclose(DES_OUT);
 331         EXIT(0);
 332         }
 333
 334 void usage()
 335         {
 336         char **u;
 337         static const char *Usage[]={
 338 "des <options> [input-file [output-file]]",
 339 "options:",
 340 "-v         : des(1) version number",
 341 "-e         : encrypt using sunOS compatible user key to DES key conversion.",
 342 "-E         : encrypt ",
 343 "-d         : decrypt using sunOS compatible user key to DES key conversion.",
 344 "-D         : decrypt ",
 345 "-c[ckname] : generate a cbc_cksum using sunOS compatible user key to",
 346 "             DES key conversion and output to ckname (stdout default,",
 347 "             stderr if data being output on stdout).  The checksum is",
 348 "             generated before encryption and after decryption if used",
 349 "             in conjunction with -[eEdD].",
 350 "-C[ckname] : generate a cbc_cksum as for -c but compatible with -[ED].",
 351 "-k key     : use key 'key'",
 352 "-h         : the key that is entered will be a hexidecimal number",
 353 "             that is used directly as the des key",
 354 "-u[uuname] : input file is uudecoded if -[dD] or output uuencoded data if -[eE]",
 355 "             (uuname is the filename to put in the uuencode header).",
 356 "-b         : encrypt using DES in ecb encryption mode, the defaut is cbc mode.",
 357 "-3         : encrypt using tripple DES encryption.  This uses 2 keys",
 358 "             generated from the input key.  If the input key is less",
 359 "             than 8 characters long, this is equivelent to normal",
 360 "             encryption.  Default is tripple cbc, -b makes it tripple ecb.",
 361 NULL
 362 };
 363         for (u=(char **)Usage; *u; u++)
 364                 {
 365                 fputs(*u,stderr);
 366                 fputc('\n',stderr);
 367                 }
 368
 369         EXIT(1);
 370         }
 371
 372 void doencryption()
 373         {
 374 #ifdef _LIBC
 375         extern int srandom();
 376         extern int random();
 377         extern unsigned long time();
 378 #endif
 379
 380         register int i;
 381         des_key_schedule ks,ks2;
 382         unsigned char iv[8],iv2[8];
 383         char *p;
 384         int num=0,j,k,l,rem,ll,len,last,ex=0;
 385         des_cblock kk,k2;
 386         FILE *O;
 387         int Exit=0;
 388 #ifndef MSDOS
 389         static unsigned char buf[BUFSIZE+8],obuf[BUFSIZE+8];
 390 #else
 391         static unsigned char *buf=NULL,*obuf=NULL;
 392
 393         if (buf == NULL)
 394                 {
 395                 if (    (( buf=(unsigned char *)Malloc(BUFSIZE+8)) == NULL) ||
 396                         ((obuf=(unsigned char *)Malloc(BUFSIZE+8)) == NULL))
 397                         {
 398                         fputs("Not enough memory\n",stderr);
 399                         Exit=10;
 400                         goto problems;
 401                         }
 402                 }
 403 #endif
 404
 405         if (hflag)
 406                 {
 407                 j=(flag3?16:8);
 408                 p=key;
 409                 for (i=0; i<j; i++)
 410                         {
 411                         k=0;
 412                         if ((*p <= '9') && (*p >= '0'))
 413                                 k=(*p-'0')<<4;
 414                         else if ((*p <= 'f') && (*p >= 'a'))
 415                                 k=(*p-'a'+10)<<4;
 416                         else if ((*p <= 'F') && (*p >= 'A'))
 417                                 k=(*p-'A'+10)<<4;
 418                         else
 419                                 {
 420                                 fputs("Bad hex key\n",stderr);
 421                                 Exit=9;
 422                                 goto problems;
 423                                 }
 424                         p++;
 425                         if ((*p <= '9') && (*p >= '0'))
 426                                 k|=(*p-'0');
 427                         else if ((*p <= 'f') && (*p >= 'a'))
 428                                 k|=(*p-'a'+10);
 429                         else if ((*p <= 'F') && (*p >= 'A'))
 430                                 k|=(*p-'A'+10);
 431                         else
 432                                 {
 433                                 fputs("Bad hex key\n",stderr);
 434                                 Exit=9;
 435                                 goto problems;
 436                                 }
 437                         p++;
 438                         if (i < 8)
 439                                 kk[i]=k;
 440                         else
 441                                 k2[i-8]=k;
 442                         }
 443                 des_set_key((C_Block *)k2,ks2);
 444                 memset(k2,0,sizeof(k2));
 445                 }
 446         else if (longk || flag3)
 447                 {
 448                 if (flag3)
 449                         {
 450                         des_string_to_2keys(key,(C_Block *)kk,(C_Block *)k2);
 451                         des_set_key((C_Block *)k2,ks2);
 452                         memset(k2,0,sizeof(k2));
 453                         }
 454                 else
 455                         des_string_to_key(key,(C_Block *)kk);
 456                 }
 457         else
 458                 for (i=0; i<KEYSIZ; i++)
 459                         {
 460                         l=0;
 461                         k=key[i];
 462                         for (j=0; j<8; j++)
 463                                 {
 464                                 if (k&1) l++;
 465                                 k>>=1;
 466                                 }
 467                         if (l & 1)
 468                                 kk[i]=key[i]&0x7f;
 469                         else
 470                                 kk[i]=key[i]|0x80;
 471                         }
 472
 473         des_set_key((C_Block *)kk,ks);
 474         memset(key,0,sizeof(key));
 475         memset(kk,0,sizeof(kk));
 476         /* woops - A bug that does not showup under unix :-( */
 477         memset(iv,0,sizeof(iv));
 478         memset(iv2,0,sizeof(iv2));
 479
 480         l=1;
 481         rem=0;
 482         /* first read */
 483         if (eflag || (!dflag && cflag))
 484                 {
 485                 for (;;)
 486                         {
 487                         num=l=fread(&(buf[rem]),1,BUFSIZE,DES_IN);
 488                         l+=rem;
 489                         num+=rem;
 490                         if (l < 0)
 491                                 {
 492                                 perror("read error");
 493                                 Exit=6;
 494                                 goto problems;
 495                                 }
 496
 497                         rem=l%8;
 498                         len=l-rem;
 499                         if (feof(DES_IN))
 500                                 {
 501                                 srandom((unsigned int)time(NULL));
 502                                 for (i=7-rem; i>0; i--)
 503                                         buf[l++]=random()&0xff;
 504                                 buf[l++]=rem;
 505                                 ex=1;
 506                                 len+=rem;
 507                                 }
 508                         else
 509                                 l-=rem;
 510
 511                         if (cflag)
 512                                 {
 513                                 des_cbc_cksum((C_Block *)buf,(C_Block *)cksum,
 514                                         (long)len,ks,(C_Block *)cksum);
 515                                 if (!eflag)
 516                                         {
 517                                         if (feof(DES_IN)) break;
 518                                         else continue;
 519                                         }
 520                                 }
 521
 522                         if (bflag && !flag3)
 523                                 for (i=0; i<l; i+=8)
 524                                         des_ecb_encrypt(
 525                                                 (des_cblock *)&(buf[i]),
 526                                                 (des_cblock *)&(obuf[i]),
 527                                                 ks,do_encrypt);
 528                         else if (flag3 && bflag)
 529                                 for (i=0; i<l; i+=8)
 530                                         des_ecb2_encrypt(
 531                                                 (des_cblock *)&(buf[i]),
 532                                                 (des_cblock *)&(obuf[i]),
 533                                                 ks,ks2,do_encrypt);
 534                         else if (flag3 && !bflag)
 535                                 {
 536                                 char tmpbuf[8];
 537
 538                                 if (rem) memcpy(tmpbuf,&(buf[l]),
 539                                         (unsigned int)rem);
 540                                 des_3cbc_encrypt(
 541                                         (des_cblock *)buf,(des_cblock *)obuf,
 542                                         (long)l,ks,ks2,(des_cblock *)iv,
 543                                         (des_cblock *)iv2,do_encrypt);
 544                                 if (rem) memcpy(&(buf[l]),tmpbuf,
 545                                         (unsigned int)rem);
 546                                 }
 547                         else
 548                                 {
 549                                 des_cbc_encrypt(
 550                                         (des_cblock *)buf,(des_cblock *)obuf,
 551                                         (long)l,ks,(des_cblock *)iv,do_encrypt);
 552                                 if (l >= 8) memcpy(iv,&(obuf[l-8]),8);
 553                                 }
 554                         if (rem) memcpy(buf,&(buf[l]),(unsigned int)rem);
 555
 556                         i=0;
 557                         while (i < l)
 558                                 {
 559                                 if (uflag)
 560                                         j=uufwrite(obuf,1,(unsigned int)l-i,
 561                                                 DES_OUT);
 562                                 else
 563                                         j=fwrite(obuf,1,(unsigned int)l-i,
 564                                                 DES_OUT);
 565                                 if (j == -1)
 566                                         {
 567                                         perror("Write error");
 568                                         Exit=7;
 569                                         goto problems;
 570                                         }
 571                                 i+=j;
 572                                 }
 573                         if (feof(DES_IN))
 574                                 {
 575                                 if (uflag) uufwriteEnd(DES_OUT);
 576                                 break;
 577                                 }
 578                         }
 579                 }
 580         else /* decrypt */
 581                 {
 582                 ex=1;
 583                 for (;;)
 584                         {
 585                         if (ex) {
 586                                 if (uflag)
 587                                         l=uufread(buf,1,BUFSIZE,DES_IN);
 588                                 else
 589                                         l=fread(buf,1,BUFSIZE,DES_IN);
 590                                 ex=0;
 591                                 rem=l%8;
 592                                 l-=rem;
 593                                 }
 594                         if (l < 0)
 595                                 {
 596                                 perror("read error");
 597                                 Exit=6;
 598                                 goto problems;
 599                                 }
 600
 601                         if (bflag && !flag3)
 602                                 for (i=0; i<l; i+=8)
 603                                         des_ecb_encrypt(
 604                                                 (des_cblock *)&(buf[i]),
 605                                                 (des_cblock *)&(obuf[i]),
 606                                                 ks,do_encrypt);
 607                         else if (flag3 && bflag)
 608                                 for (i=0; i<l; i+=8)
 609                                         des_ecb2_encrypt(
 610                                                 (des_cblock *)&(buf[i]),
 611                                                 (des_cblock *)&(obuf[i]),
 612                                                 ks,ks2,do_encrypt);
 613                         else if (flag3 && !bflag)
 614                                 {
 615                                 des_3cbc_encrypt(
 616                                         (des_cblock *)buf,(des_cblock *)obuf,
 617                                         (long)l,ks,ks2,(des_cblock *)iv,
 618                                         (des_cblock *)iv2,do_encrypt);
 619                                 }
 620                         else
 621                                 {
 622                                 des_cbc_encrypt(
 623                                         (des_cblock *)buf,(des_cblock *)obuf,
 624                                         (long)l,ks,(des_cblock *)iv,do_encrypt);
 625                                 if (l >= 8) memcpy(iv,&(buf[l-8]),8);
 626                                 }
 627
 628                         if (uflag)
 629                                 ll=uufread(&(buf[rem]),1,BUFSIZE,DES_IN);
 630                         else
 631                                 ll=fread(&(buf[rem]),1,BUFSIZE,DES_IN);
 632                         ll+=rem;
 633                         rem=ll%8;
 634                         ll-=rem;
 635                         if (feof(DES_IN) && (ll == 0))
 636                                 {
 637                                 last=obuf[l-1];
 638
 639                                 if ((last > 7) || (last < 0))
 640                                         {
 641                                         fputs("The file was not decrypted correctly.\n",
 642                                                 stderr);
 643                                         Exit=8;
 644                                         last=0;
 645                                         }
 646                                 l=l-8+last;
 647                                 }
 648                         i=0;
 649                         if (cflag) des_cbc_cksum((C_Block *)obuf,
 650                                 (C_Block *)cksum,(long)l/8*8,ks,
 651                                 (C_Block *)cksum);
 652                         while (i != l)
 653                                 {
 654                                 j=fwrite(obuf,1,(unsigned int)l-i,DES_OUT);
 655                                 if (j == -1)
 656                                         {
 657                                         perror("Write error");
 658                                         Exit=7;
 659                                         goto problems;
 660                                         }
 661                                 i+=j;
 662                                 }
 663                         l=ll;
 664                         if ((l == 0) && feof(DES_IN)) break;
 665                         }
 666                 }
 667         if (cflag)
 668                 {
 669                 l=0;
 670                 if (cksumname[0] != '\0')
 671                         {
 672                         if ((O=fopen(cksumname,"w")) != NULL)
 673                                 {
 674                                 CKSUM_OUT=O;
 675                                 l=1;
 676                                 }
 677                         }
 678                 for (i=0; i<8; i++)
 679                         fprintf(CKSUM_OUT,"%02X",cksum[i]);
 680                 fprintf(CKSUM_OUT,"\n");
 681                 if (l) fclose(CKSUM_OUT);
 682                 }
 683 problems:
 684         memset(buf,0,sizeof(buf));
 685         memset(obuf,0,sizeof(obuf));
 686         memset(ks,0,sizeof(ks));
 687         memset(ks2,0,sizeof(ks2));
 688         memset(iv,0,sizeof(iv));
 689         memset(iv2,0,sizeof(iv2));
 690         memset(kk,0,sizeof(kk));
 691         memset(k2,0,sizeof(k2));
 692         memset(uubuf,0,sizeof(uubuf));
 693         memset(b,0,sizeof(b));
 694         memset(bb,0,sizeof(bb));
 695         memset(cksum,0,sizeof(cksum));
 696         if (Exit) EXIT(Exit);
 697         }
 698
 699 int uufwrite(data, size, num, fp)
 700 unsigned char *data;
 701 int size;
 702 unsigned int num;
 703 FILE *fp;
 704
 705      /* We ignore this parameter but it should be > ~50 I believe */
 706
 707
 708         {
 709         int i,j,left,rem,ret=num;
 710         static int start=1;
 711
 712         if (start)
 713                 {
 714                 fprintf(fp,"begin 600 %s\n",
 715                         (uuname[0] == '\0')?"text.d":uuname);
 716                 start=0;
 717                 }
 718
 719         if (uubufnum)
 720                 {
 721                 if (uubufnum+num < 45)
 722                         {
 723                         memcpy(&(uubuf[uubufnum]),data,(unsigned int)num);
 724                         uubufnum+=num;
 725                         return(num);
 726                         }
 727                 else
 728                         {
 729                         i=45-uubufnum;
 730                         memcpy(&(uubuf[uubufnum]),data,(unsigned int)i);
 731                         j=uuencode((unsigned char *)uubuf,45,b);
 732                         fwrite(b,1,(unsigned int)j,fp);
 733                         uubufnum=0;
 734                         data+=i;
 735                         num-=i;
 736                         }
 737                 }
 738
 739         for (i=0; i<(((int)num)-INUUBUFN); i+=INUUBUFN)
 740                 {
 741                 j=uuencode(&(data[i]),INUUBUFN,b);
 742                 fwrite(b,1,(unsigned int)j,fp);
 743                 }
 744         rem=(num-i)%45;
 745         left=(num-i-rem);
 746         if (left)
 747                 {
 748                 j=uuencode(&(data[i]),left,b);
 749                 fwrite(b,1,(unsigned int)j,fp);
 750                 i+=left;
 751                 }
 752         if (i != num)
 753                 {
 754                 memcpy(uubuf,&(data[i]),(unsigned int)rem);
 755                 uubufnum=rem;
 756                 }
 757         return(ret);
 758         }
 759
 760 void uufwriteEnd(fp)
 761 FILE *fp;
 762         {
 763         int j;
 764         static const char *end=" \nend\n";
 765
 766         if (uubufnum != 0)
 767                 {
 768                 uubuf[uubufnum]='\0';
 769                 uubuf[uubufnum+1]='\0';
 770                 uubuf[uubufnum+2]='\0';
 771                 j=uuencode(uubuf,uubufnum,b);
 772                 fwrite(b,1,(unsigned int)j,fp);
 773                 }
 774         fwrite(end,1,strlen(end),fp);
 775         }
 776
 777 int uufread(out, size, num, fp)
 778 unsigned char *out;
 779 int size; /* should always be > ~ 60; I actually ignore this parameter :-) */
 780 unsigned int num;
 781 FILE *fp;
 782         {
 783         int i,j,tot;
 784         static int done=0;
 785         static int valid=0;
 786         static int start=1;
 787
 788         if (start)
 789                 {
 790                 for (;;)
 791                         {
 792                         b[0]='\0';
 793                         fgets((char *)b,300,fp);
 794                         if (b[0] == '\0')
 795                                 {
 796                                 fprintf(stderr,"no 'begin' found in uuencoded input\n");
 797                                 return(-1);
 798                                 }
 799                         if (strncmp((char *)b,"begin ",6) == 0) break;
 800                         }
 801                 start=0;
 802                 }
 803         if (done) return(0);
 804         tot=0;
 805         if (valid)
 806                 {
 807                 memcpy(out,bb,(unsigned int)valid);
 808                 tot=valid;
 809                 valid=0;
 810                 }
 811         for (;;)
 812                 {
 813                 b[0]='\0';
 814                 fgets((char *)b,300,fp);
 815                 if (b[0] == '\0') break;
 816                 i=strlen((char *)b);
 817                 if ((b[0] == 'e') && (b[1] == 'n') && (b[2] == 'd'))
 818                         {
 819                         done=1;
 820                         while (!feof(fp))
 821                                 {
 822                                 fgets((char *)b,300,fp);
 823                                 }
 824                         break;
 825                         }
 826                 i=uudecode(b,i,bb);
 827                 if (i < 0) break;
 828                 if ((i+tot+8) > num)
 829                         {
 830                         /* num to copy to make it a multiple of 8 */
 831                         j=(num/8*8)-tot-8;
 832                         memcpy(&(out[tot]),bb,(unsigned int)j);
 833                         tot+=j;
 834                         memcpy(bb,&(bb[j]),(unsigned int)i-j);
 835                         valid=i-j;
 836                         break;
 837                         }
 838                 memcpy(&(out[tot]),bb,(unsigned int)i);
 839                 tot+=i;
 840                 }
 841         return(tot);
 842         }
 843
 844 #define ccc2l(c,l)      (l =((DES_LONG)(*((c)++)))<<16, \
 845                          l|=((DES_LONG)(*((c)++)))<< 8, \
 846                          l|=((DES_LONG)(*((c)++))))
 847
 848 #define l2ccc(l,c)      (*((c)++)=(unsigned char)(((l)>>16)&0xff), \
 849                     *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
 850                     *((c)++)=(unsigned char)(((l)    )&0xff))
 851
 852
 853 int uuencode(in, num, out)
 854 unsigned char *in;
 855 int num;
 856 unsigned char *out;
 857         {
 858         int j,i,n,tot=0;
 859         DES_LONG l;
 860         register unsigned char *p;
 861         p=out;
 862
 863         for (j=0; j<num; j+=45)
 864                 {
 865                 if (j+45 > num)
 866                         i=(num-j);
 867                 else    i=45;
 868                 *(p++)=i+' ';
 869                 for (n=0; n<i; n+=3)
 870                         {
 871                         ccc2l(in,l);
 872                         *(p++)=((l>>18)&0x3f)+' ';
 873                         *(p++)=((l>>12)&0x3f)+' ';
 874                         *(p++)=((l>> 6)&0x3f)+' ';
 875                         *(p++)=((l    )&0x3f)+' ';
 876                         tot+=4;
 877                         }
 878                 *(p++)='\n';
 879                 tot+=2;
 880                 }
 881         *p='\0';
 882         l=0;
 883         return(tot);
 884         }
 885
 886 int uudecode(in, num, out)
 887 unsigned char *in;
 888 int num;
 889 unsigned char *out;
 890         {
 891         int j,i,k;
 892         unsigned int n=0,space=0;
 893         DES_LONG l;
 894         DES_LONG w,x,y,z;
 895         unsigned int blank=(unsigned int)'\n'-' ';
 896
 897         for (j=0; j<num; )
 898                 {
 899                 n= *(in++)-' ';
 900                 if (n == blank)
 901                         {
 902                         n=0;
 903                         in--;
 904                         }
 905                 if (n > 60)
 906                         {
 907                         fprintf(stderr,"uuencoded line length too long\n");
 908                         return(-1);
 909                         }
 910                 j++;
 911
 912                 for (i=0; i<n; j+=4,i+=3)
 913                         {
 914                         /* the following is for cases where spaces are
 915                          * removed from lines.
 916                          */
 917                         if (space)
 918                                 {
 919                                 w=x=y=z=0;
 920                                 }
 921                         else
 922                                 {
 923                                 w= *(in++)-' ';
 924                                 x= *(in++)-' ';
 925                                 y= *(in++)-' ';
 926                                 z= *(in++)-' ';
 927                                 }
 928                         if ((w > 63) || (x > 63) || (y > 63) || (z > 63))
 929                                 {
 930                                 k=0;
 931                                 if (w == blank) k=1;
 932                                 if (x == blank) k=2;
 933                                 if (y == blank) k=3;
 934                                 if (z == blank) k=4;
 935                                 space=1;
 936                                 switch (k) {
 937                                 case 1: w=0; in--;
 938                                 case 2: x=0; in--;
 939                                 case 3: y=0; in--;
 940                                 case 4: z=0; in--;
 941                                         break;
 942                                 case 0:
 943                                         space=0;
 944                                         fprintf(stderr,"bad uuencoded data values\n");
 945                                         w=x=y=z=0;
 946                                         return(-1);
 947                                         break;
 948                                         }
 949                                 }
 950                         l=(w<<18)|(x<<12)|(y<< 6)|(z    );
 951                         l2ccc(l,out);
 952                         }
 953                 if (*(in++) != '\n')
 954                         {
 955                         fprintf(stderr,"missing nl in uuencoded line\n");
 956                         w=x=y=z=0;
 957                         return(-1);
 958                         }
 959                 j++;
 960                 }
 961         *out='\0';
 962         w=x=y=z=0;
 963         return(n);
 964         }