crypto/des/des.c

   1 /* crypto/des/des.c */
   2 /* Copyright (C) 1995-1997 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 #else
 103 void usage();
 104 void doencryption();
 105 int uufwrite();
 106 void uufwriteEnd();
 107 int uufread();
 108 int uuencode();
 109 int uudecode();
 110 #endif
 111
 112 #ifdef VMS
 113 #define EXIT(a) exit(a&0x10000000)
 114 #else
 115 #define EXIT(a) exit(a)
 116 #endif
 117
 118 #define BUFSIZE (8*1024)
 119 #define VERIFY  1
 120 #define KEYSIZ  8
 121 #define KEYSIZB 1024 /* should hit tty line limit first :-) */
 122 char key[KEYSIZB+1];
 123 int do_encrypt,longk=0;
 124 FILE *DES_IN,*DES_OUT,*CKSUM_OUT;
 125 char uuname[200];
 126 unsigned char uubuf[50];
 127 int uubufnum=0;
 128 #define INUUBUFN        (45*100)
 129 #define OUTUUBUF        (65*100)
 130 unsigned char b[OUTUUBUF];
 131 unsigned char bb[300];
 132 des_cblock cksum={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
 133 char cksumname[200]="";
 134
 135 int vflag,cflag,eflag,dflag,kflag,bflag,fflag,sflag,uflag,flag3,hflag,error;
 136
 137 int main(argc, argv)
 138 int argc;
 139 char **argv;
 140         {
 141         int i;
 142         struct stat ins,outs;
 143         char *p;
 144         char *in=NULL,*out=NULL;
 145
 146         vflag=cflag=eflag=dflag=kflag=hflag=bflag=fflag=sflag=uflag=flag3=0;
 147         error=0;
 148         memset(key,0,sizeof(key));
 149
 150         for (i=1; i<argc; i++)
 151                 {
 152                 p=argv[i];
 153                 if ((p[0] == '-') && (p[1] != '\0'))
 154                         {
 155                         p++;
 156                         while (*p)
 157                                 {
 158                                 switch (*(p++))
 159                                         {
 160                                 case '3':
 161                                         flag3=1;
 162                                         longk=1;
 163                                         break;
 164                                 case 'c':
 165                                         cflag=1;
 166                                         strncpy(cksumname,p,200);
 167                                         p+=strlen(cksumname);
 168                                         break;
 169                                 case 'C':
 170                                         cflag=1;
 171                                         longk=1;
 172                                         strncpy(cksumname,p,200);
 173                                         p+=strlen(cksumname);
 174                                         break;
 175                                 case 'e':
 176                                         eflag=1;
 177                                         break;
 178                                 case 'v':
 179                                         vflag=1;
 180                                         break;
 181                                 case 'E':
 182                                         eflag=1;
 183                                         longk=1;
 184                                         break;
 185                                 case 'd':
 186                                         dflag=1;
 187                                         break;
 188                                 case 'D':
 189                                         dflag=1;
 190                                         longk=1;
 191                                         break;
 192                                 case 'b':
 193                                         bflag=1;
 194                                         break;
 195                                 case 'f':
 196                                         fflag=1;
 197                                         break;
 198                                 case 's':
 199                                         sflag=1;
 200                                         break;
 201                                 case 'u':
 202                                         uflag=1;
 203                                         strncpy(uuname,p,200);
 204                                         p+=strlen(uuname);
 205                                         break;
 206                                 case 'h':
 207                                         hflag=1;
 208                                         break;
 209                                 case 'k':
 210                                         kflag=1;
 211                                         if ((i+1) == argc)
 212                                                 {
 213                                                 fputs("must have a key with the -k option\n",stderr);
 214                                                 error=1;
 215                                                 }
 216                                         else
 217                                                 {
 218                                                 int j;
 219
 220                                                 i++;
 221                                                 strncpy(key,argv[i],KEYSIZB);
 222                                                 for (j=strlen(argv[i])-1; j>=0; j--)
 223                                                         argv[i][j]='\0';
 224                                                 }
 225                                         break;
 226                                 default:
 227                                         fprintf(stderr,"'%c' unknown flag\n",p[-1]);
 228                                         error=1;
 229                                         break;
 230                                         }
 231                                 }
 232                         }
 233                 else
 234                         {
 235                         if (in == NULL)
 236                                 in=argv[i];
 237                         else if (out == NULL)
 238                                 out=argv[i];
 239                         else
 240                                 error=1;
 241                         }
 242                 }
 243         if (error) usage();
 244         /* We either
 245          * do checksum or
 246          * do encrypt or
 247          * do decrypt or
 248          * do decrypt then ckecksum or
 249          * do checksum then encrypt
 250          */
 251         if (((eflag+dflag) == 1) || cflag)
 252                 {
 253                 if (eflag) do_encrypt=DES_ENCRYPT;
 254                 if (dflag) do_encrypt=DES_DECRYPT;
 255                 }
 256         else
 257                 {
 258                 if (vflag)
 259                         {
 260 #ifndef _Windows
 261                         fprintf(stderr,"des(1) built with %s\n",libdes_version);
 262 #endif
 263                         EXIT(1);
 264                         }
 265                 else usage();
 266                 }
 267
 268 #ifndef _Windows
 269         if (vflag) fprintf(stderr,"des(1) built with %s\n",libdes_version);
 270 #endif
 271         if (    (in != NULL) &&
 272                 (out != NULL) &&
 273 #ifndef MSDOS
 274                 (stat(in,&ins) != -1) &&
 275                 (stat(out,&outs) != -1) &&
 276                 (ins.st_dev == outs.st_dev) &&
 277                 (ins.st_ino == outs.st_ino))
 278 #else /* MSDOS */
 279                 (strcmp(in,out) == 0))
 280 #endif
 281                         {
 282                         fputs("input and output file are the same\n",stderr);
 283                         EXIT(3);
 284                         }
 285
 286         if (!kflag)
 287                 if (des_read_pw_string(key,KEYSIZB+1,"Enter key:",eflag?VERIFY:0))
 288                         {
 289                         fputs("password error\n",stderr);
 290                         EXIT(2);
 291                         }
 292
 293         if (in == NULL)
 294                 DES_IN=stdin;
 295         else if ((DES_IN=fopen(in,"r")) == NULL)
 296                 {
 297                 perror("opening input file");
 298                 EXIT(4);
 299                 }
 300
 301         CKSUM_OUT=stdout;
 302         if (out == NULL)
 303                 {
 304                 DES_OUT=stdout;
 305                 CKSUM_OUT=stderr;
 306                 }
 307         else if ((DES_OUT=fopen(out,"w")) == NULL)
 308                 {
 309                 perror("opening output file");
 310                 EXIT(5);
 311                 }
 312
 313 #ifdef MSDOS
 314         /* This should set the file to binary mode. */
 315         {
 316 #include <fcntl.h>
 317         if (!(uflag && dflag))
 318                 setmode(fileno(DES_IN),O_BINARY);
 319         if (!(uflag && eflag))
 320                 setmode(fileno(DES_OUT),O_BINARY);
 321         }
 322 #endif
 323
 324         doencryption();
 325         fclose(DES_IN);
 326         fclose(DES_OUT);
 327         EXIT(0);
 328         }
 329
 330 void usage()
 331         {
 332         char **u;
 333         static const char *Usage[]={
 334 "des <options> [input-file [output-file]]",
 335 "options:",
 336 "-v         : des(1) version number",
 337 "-e         : encrypt using sunOS compatible user key to DES key conversion.",
 338 "-E         : encrypt ",
 339 "-d         : decrypt using sunOS compatible user key to DES key conversion.",
 340 "-D         : decrypt ",
 341 "-c[ckname] : generate a cbc_cksum using sunOS compatible user key to",
 342 "             DES key conversion and output to ckname (stdout default,",
 343 "             stderr if data being output on stdout).  The checksum is",
 344 "             generated before encryption and after decryption if used",
 345 "             in conjunction with -[eEdD].",
 346 "-C[ckname] : generate a cbc_cksum as for -c but compatible with -[ED].",
 347 "-k key     : use key 'key'",
 348 "-h         : the key that is entered will be a hexidecimal number",
 349 "             that is used directly as the des key",
 350 "-u[uuname] : input file is uudecoded if -[dD] or output uuencoded data if -[eE]",
 351 "             (uuname is the filename to put in the uuencode header).",
 352 "-b         : encrypt using DES in ecb encryption mode, the defaut is cbc mode.",
 353 "-3         : encrypt using tripple DES encryption.  This uses 2 keys",
 354 "             generated from the input key.  If the input key is less",
 355 "             than 8 characters long, this is equivelent to normal",
 356 "             encryption.  Default is tripple cbc, -b makes it tripple ecb.",
 357 NULL
 358 };
 359         for (u=(char **)Usage; *u; u++)
 360                 {
 361                 fputs(*u,stderr);
 362                 fputc('\n',stderr);
 363                 }
 364
 365         EXIT(1);
 366         }
 367
 368 void doencryption()
 369         {
 370 #ifdef _LIBC
 371         extern int srandom();
 372         extern int random();
 373         extern unsigned long time();
 374 #endif
 375
 376         register int i;
 377         des_key_schedule ks,ks2;
 378         unsigned char iv[8],iv2[8];
 379         char *p;
 380         int num=0,j,k,l,rem,ll,len,last,ex=0;
 381         des_cblock kk,k2;
 382         FILE *O;
 383         int Exit=0;
 384 #ifndef MSDOS
 385         static unsigned char buf[BUFSIZE+8],obuf[BUFSIZE+8];
 386 #else
 387         static unsigned char *buf=NULL,*obuf=NULL;
 388
 389         if (buf == NULL)
 390                 {
 391                 if (    (( buf=(unsigned char *)Malloc(BUFSIZE+8)) == NULL) ||
 392                         ((obuf=(unsigned char *)Malloc(BUFSIZE+8)) == NULL))
 393                         {
 394                         fputs("Not enough memory\n",stderr);
 395                         Exit=10;
 396                         goto problems;
 397                         }
 398                 }
 399 #endif
 400
 401         if (hflag)
 402                 {
 403                 j=(flag3?16:8);
 404                 p=key;
 405                 for (i=0; i<j; i++)
 406                         {
 407                         k=0;
 408                         if ((*p <= '9') && (*p >= '0'))
 409                                 k=(*p-'0')<<4;
 410                         else if ((*p <= 'f') && (*p >= 'a'))
 411                                 k=(*p-'a'+10)<<4;
 412                         else if ((*p <= 'F') && (*p >= 'A'))
 413                                 k=(*p-'A'+10)<<4;
 414                         else
 415                                 {
 416                                 fputs("Bad hex key\n",stderr);
 417                                 Exit=9;
 418                                 goto problems;
 419                                 }
 420                         p++;
 421                         if ((*p <= '9') && (*p >= '0'))
 422                                 k|=(*p-'0');
 423                         else if ((*p <= 'f') && (*p >= 'a'))
 424                                 k|=(*p-'a'+10);
 425                         else if ((*p <= 'F') && (*p >= 'A'))
 426                                 k|=(*p-'A'+10);
 427                         else
 428                                 {
 429                                 fputs("Bad hex key\n",stderr);
 430                                 Exit=9;
 431                                 goto problems;
 432                                 }
 433                         p++;
 434                         if (i < 8)
 435                                 kk[i]=k;
 436                         else
 437                                 k2[i-8]=k;
 438                         }
 439                 des_set_key((C_Block *)k2,ks2);
 440                 memset(k2,0,sizeof(k2));
 441                 }
 442         else if (longk || flag3)
 443                 {
 444                 if (flag3)
 445                         {
 446                         des_string_to_2keys(key,(C_Block *)kk,(C_Block *)k2);
 447                         des_set_key((C_Block *)k2,ks2);
 448                         memset(k2,0,sizeof(k2));
 449                         }
 450                 else
 451                         des_string_to_key(key,(C_Block *)kk);
 452                 }
 453         else
 454                 for (i=0; i<KEYSIZ; i++)
 455                         {
 456                         l=0;
 457                         k=key[i];
 458                         for (j=0; j<8; j++)
 459                                 {
 460                                 if (k&1) l++;
 461                                 k>>=1;
 462                                 }
 463                         if (l & 1)
 464                                 kk[i]=key[i]&0x7f;
 465                         else
 466                                 kk[i]=key[i]|0x80;
 467                         }
 468
 469         des_set_key((C_Block *)kk,ks);
 470         memset(key,0,sizeof(key));
 471         memset(kk,0,sizeof(kk));
 472         /* woops - A bug that does not showup under unix :-( */
 473         memset(iv,0,sizeof(iv));
 474         memset(iv2,0,sizeof(iv2));
 475
 476         l=1;
 477         rem=0;
 478         /* first read */
 479         if (eflag || (!dflag && cflag))
 480                 {
 481                 for (;;)
 482                         {
 483                         num=l=fread(&(buf[rem]),1,BUFSIZE,DES_IN);
 484                         l+=rem;
 485                         num+=rem;
 486                         if (l < 0)
 487                                 {
 488                                 perror("read error");
 489                                 Exit=6;
 490                                 goto problems;
 491                                 }
 492
 493                         rem=l%8;
 494                         len=l-rem;
 495                         if (feof(DES_IN))
 496                                 {
 497                                 srandom((unsigned int)time(NULL));
 498                                 for (i=7-rem; i>0; i--)
 499                                         buf[l++]=random()&0xff;
 500                                 buf[l++]=rem;
 501                                 ex=1;
 502                                 len+=rem;
 503                                 }
 504                         else
 505                                 l-=rem;
 506
 507                         if (cflag)
 508                                 {
 509                                 des_cbc_cksum((C_Block *)buf,(C_Block *)cksum,
 510                                         (long)len,ks,(C_Block *)cksum);
 511                                 if (!eflag)
 512                                         {
 513                                         if (feof(DES_IN)) break;
 514                                         else continue;
 515                                         }
 516                                 }
 517
 518                         if (bflag && !flag3)
 519                                 for (i=0; i<l; i+=8)
 520                                         des_ecb_encrypt(
 521                                                 (des_cblock *)&(buf[i]),
 522                                                 (des_cblock *)&(obuf[i]),
 523                                                 ks,do_encrypt);
 524                         else if (flag3 && bflag)
 525                                 for (i=0; i<l; i+=8)
 526                                         des_ecb2_encrypt(
 527                                                 (des_cblock *)&(buf[i]),
 528                                                 (des_cblock *)&(obuf[i]),
 529                                                 ks,ks2,do_encrypt);
 530                         else if (flag3 && !bflag)
 531                                 {
 532                                 char tmpbuf[8];
 533
 534                                 if (rem) memcpy(tmpbuf,&(buf[l]),
 535                                         (unsigned int)rem);
 536                                 des_3cbc_encrypt(
 537                                         (des_cblock *)buf,(des_cblock *)obuf,
 538                                         (long)l,ks,ks2,(des_cblock *)iv,
 539                                         (des_cblock *)iv2,do_encrypt);
 540                                 if (rem) memcpy(&(buf[l]),tmpbuf,
 541                                         (unsigned int)rem);
 542                                 }
 543                         else
 544                                 {
 545                                 des_cbc_encrypt(
 546                                         (des_cblock *)buf,(des_cblock *)obuf,
 547                                         (long)l,ks,(des_cblock *)iv,do_encrypt);
 548                                 if (l >= 8) memcpy(iv,&(obuf[l-8]),8);
 549                                 }
 550                         if (rem) memcpy(buf,&(buf[l]),(unsigned int)rem);
 551
 552                         i=0;
 553                         while (i < l)
 554                                 {
 555                                 if (uflag)
 556                                         j=uufwrite(obuf,1,(unsigned int)l-i,
 557                                                 DES_OUT);
 558                                 else
 559                                         j=fwrite(obuf,1,(unsigned int)l-i,
 560                                                 DES_OUT);
 561                                 if (j == -1)
 562                                         {
 563                                         perror("Write error");
 564                                         Exit=7;
 565                                         goto problems;
 566                                         }
 567                                 i+=j;
 568                                 }
 569                         if (feof(DES_IN))
 570                                 {
 571                                 if (uflag) uufwriteEnd(DES_OUT);
 572                                 break;
 573                                 }
 574                         }
 575                 }
 576         else /* decrypt */
 577                 {
 578                 ex=1;
 579                 for (;;)
 580                         {
 581                         if (ex) {
 582                                 if (uflag)
 583                                         l=uufread(buf,1,BUFSIZE,DES_IN);
 584                                 else
 585                                         l=fread(buf,1,BUFSIZE,DES_IN);
 586                                 ex=0;
 587                                 rem=l%8;
 588                                 l-=rem;
 589                                 }
 590                         if (l < 0)
 591                                 {
 592                                 perror("read error");
 593                                 Exit=6;
 594                                 goto problems;
 595                                 }
 596
 597                         if (bflag && !flag3)
 598                                 for (i=0; i<l; i+=8)
 599                                         des_ecb_encrypt(
 600                                                 (des_cblock *)&(buf[i]),
 601                                                 (des_cblock *)&(obuf[i]),
 602                                                 ks,do_encrypt);
 603                         else if (flag3 && bflag)
 604                                 for (i=0; i<l; i+=8)
 605                                         des_ecb2_encrypt(
 606                                                 (des_cblock *)&(buf[i]),
 607                                                 (des_cblock *)&(obuf[i]),
 608                                                 ks,ks2,do_encrypt);
 609                         else if (flag3 && !bflag)
 610                                 {
 611                                 des_3cbc_encrypt(
 612                                         (des_cblock *)buf,(des_cblock *)obuf,
 613                                         (long)l,ks,ks2,(des_cblock *)iv,
 614                                         (des_cblock *)iv2,do_encrypt);
 615                                 }
 616                         else
 617                                 {
 618                                 des_cbc_encrypt(
 619                                         (des_cblock *)buf,(des_cblock *)obuf,
 620                                         (long)l,ks,(des_cblock *)iv,do_encrypt);
 621                                 if (l >= 8) memcpy(iv,&(buf[l-8]),8);
 622                                 }
 623
 624                         if (uflag)
 625                                 ll=uufread(&(buf[rem]),1,BUFSIZE,DES_IN);
 626                         else
 627                                 ll=fread(&(buf[rem]),1,BUFSIZE,DES_IN);
 628                         ll+=rem;
 629                         rem=ll%8;
 630                         ll-=rem;
 631                         if (feof(DES_IN) && (ll == 0))
 632                                 {
 633                                 last=obuf[l-1];
 634
 635                                 if ((last > 7) || (last < 0))
 636                                         {
 637                                         fputs("The file was not decrypted correctly.\n",
 638                                                 stderr);
 639                                         Exit=8;
 640                                         last=0;
 641                                         }
 642                                 l=l-8+last;
 643                                 }
 644                         i=0;
 645                         if (cflag) des_cbc_cksum((C_Block *)obuf,
 646                                 (C_Block *)cksum,(long)l/8*8,ks,
 647                                 (C_Block *)cksum);
 648                         while (i != l)
 649                                 {
 650                                 j=fwrite(obuf,1,(unsigned int)l-i,DES_OUT);
 651                                 if (j == -1)
 652                                         {
 653                                         perror("Write error");
 654                                         Exit=7;
 655                                         goto problems;
 656                                         }
 657                                 i+=j;
 658                                 }
 659                         l=ll;
 660                         if ((l == 0) && feof(DES_IN)) break;
 661                         }
 662                 }
 663         if (cflag)
 664                 {
 665                 l=0;
 666                 if (cksumname[0] != '\0')
 667                         {
 668                         if ((O=fopen(cksumname,"w")) != NULL)
 669                                 {
 670                                 CKSUM_OUT=O;
 671                                 l=1;
 672                                 }
 673                         }
 674                 for (i=0; i<8; i++)
 675                         fprintf(CKSUM_OUT,"%02X",cksum[i]);
 676                 fprintf(CKSUM_OUT,"\n");
 677                 if (l) fclose(CKSUM_OUT);
 678                 }
 679 problems:
 680         memset(buf,0,sizeof(buf));
 681         memset(obuf,0,sizeof(obuf));
 682         memset(ks,0,sizeof(ks));
 683         memset(ks2,0,sizeof(ks2));
 684         memset(iv,0,sizeof(iv));
 685         memset(iv2,0,sizeof(iv2));
 686         memset(kk,0,sizeof(kk));
 687         memset(k2,0,sizeof(k2));
 688         memset(uubuf,0,sizeof(uubuf));
 689         memset(b,0,sizeof(b));
 690         memset(bb,0,sizeof(bb));
 691         memset(cksum,0,sizeof(cksum));
 692         if (Exit) EXIT(Exit);
 693         }
 694
 695 int uufwrite(data, size, num, fp)
 696 unsigned char *data;
 697 int size;
 698 unsigned int num;
 699 FILE *fp;
 700
 701      /* We ignore this parameter but it should be > ~50 I believe */
 702
 703
 704         {
 705         int i,j,left,rem,ret=num;
 706         static int start=1;
 707
 708         if (start)
 709                 {
 710                 fprintf(fp,"begin 600 %s\n",
 711                         (uuname[0] == '\0')?"text.d":uuname);
 712                 start=0;
 713                 }
 714
 715         if (uubufnum)
 716                 {
 717                 if (uubufnum+num < 45)
 718                         {
 719                         memcpy(&(uubuf[uubufnum]),data,(unsigned int)num);
 720                         uubufnum+=num;
 721                         return(num);
 722                         }
 723                 else
 724                         {
 725                         i=45-uubufnum;
 726                         memcpy(&(uubuf[uubufnum]),data,(unsigned int)i);
 727                         j=uuencode((unsigned char *)uubuf,45,b);
 728                         fwrite(b,1,(unsigned int)j,fp);
 729                         uubufnum=0;
 730                         data+=i;
 731                         num-=i;
 732                         }
 733                 }
 734
 735         for (i=0; i<(((int)num)-INUUBUFN); i+=INUUBUFN)
 736                 {
 737                 j=uuencode(&(data[i]),INUUBUFN,b);
 738                 fwrite(b,1,(unsigned int)j,fp);
 739                 }
 740         rem=(num-i)%45;
 741         left=(num-i-rem);
 742         if (left)
 743                 {
 744                 j=uuencode(&(data[i]),left,b);
 745                 fwrite(b,1,(unsigned int)j,fp);
 746                 i+=left;
 747                 }
 748         if (i != num)
 749                 {
 750                 memcpy(uubuf,&(data[i]),(unsigned int)rem);
 751                 uubufnum=rem;
 752                 }
 753         return(ret);
 754         }
 755
 756 void uufwriteEnd(fp)
 757 FILE *fp;
 758         {
 759         int j;
 760         static const char *end=" \nend\n";
 761
 762         if (uubufnum != 0)
 763                 {
 764                 uubuf[uubufnum]='\0';
 765                 uubuf[uubufnum+1]='\0';
 766                 uubuf[uubufnum+2]='\0';
 767                 j=uuencode(uubuf,uubufnum,b);
 768                 fwrite(b,1,(unsigned int)j,fp);
 769                 }
 770         fwrite(end,1,strlen(end),fp);
 771         }
 772
 773 int uufread(out, size, num, fp)
 774 unsigned char *out;
 775 int size; /* should always be > ~ 60; I actually ignore this parameter :-) */
 776 unsigned int num;
 777 FILE *fp;
 778         {
 779         int i,j,tot;
 780         static int done=0;
 781         static int valid=0;
 782         static int start=1;
 783
 784         if (start)
 785                 {
 786                 for (;;)
 787                         {
 788                         b[0]='\0';
 789                         fgets((char *)b,300,fp);
 790                         if (b[0] == '\0')
 791                                 {
 792                                 fprintf(stderr,"no 'begin' found in uuencoded input\n");
 793                                 return(-1);
 794                                 }
 795                         if (strncmp((char *)b,"begin ",6) == 0) break;
 796                         }
 797                 start=0;
 798                 }
 799         if (done) return(0);
 800         tot=0;
 801         if (valid)
 802                 {
 803                 memcpy(out,bb,(unsigned int)valid);
 804                 tot=valid;
 805                 valid=0;
 806                 }
 807         for (;;)
 808                 {
 809                 b[0]='\0';
 810                 fgets((char *)b,300,fp);
 811                 if (b[0] == '\0') break;
 812                 i=strlen((char *)b);
 813                 if ((b[0] == 'e') && (b[1] == 'n') && (b[2] == 'd'))
 814                         {
 815                         done=1;
 816                         while (!feof(fp))
 817                                 {
 818                                 fgets((char *)b,300,fp);
 819                                 }
 820                         break;
 821                         }
 822                 i=uudecode(b,i,bb);
 823                 if (i < 0) break;
 824                 if ((i+tot+8) > num)
 825                         {
 826                         /* num to copy to make it a multiple of 8 */
 827                         j=(num/8*8)-tot-8;
 828                         memcpy(&(out[tot]),bb,(unsigned int)j);
 829                         tot+=j;
 830                         memcpy(bb,&(bb[j]),(unsigned int)i-j);
 831                         valid=i-j;
 832                         break;
 833                         }
 834                 memcpy(&(out[tot]),bb,(unsigned int)i);
 835                 tot+=i;
 836                 }
 837         return(tot);
 838         }
 839
 840 #define ccc2l(c,l)      (l =((DES_LONG)(*((c)++)))<<16, \
 841                          l|=((DES_LONG)(*((c)++)))<< 8, \
 842                          l|=((DES_LONG)(*((c)++))))
 843
 844 #define l2ccc(l,c)      (*((c)++)=(unsigned char)(((l)>>16)&0xff), \
 845                     *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
 846                     *((c)++)=(unsigned char)(((l)    )&0xff))
 847
 848
 849 int uuencode(in, num, out)
 850 unsigned char *in;
 851 int num;
 852 unsigned char *out;
 853         {
 854         int j,i,n,tot=0;
 855         DES_LONG l;
 856         register unsigned char *p;
 857         p=out;
 858
 859         for (j=0; j<num; j+=45)
 860                 {
 861                 if (j+45 > num)
 862                         i=(num-j);
 863                 else    i=45;
 864                 *(p++)=i+' ';
 865                 for (n=0; n<i; n+=3)
 866                         {
 867                         ccc2l(in,l);
 868                         *(p++)=((l>>18)&0x3f)+' ';
 869                         *(p++)=((l>>12)&0x3f)+' ';
 870                         *(p++)=((l>> 6)&0x3f)+' ';
 871                         *(p++)=((l    )&0x3f)+' ';
 872                         tot+=4;
 873                         }
 874                 *(p++)='\n';
 875                 tot+=2;
 876                 }
 877         *p='\0';
 878         l=0;
 879         return(tot);
 880         }
 881
 882 int uudecode(in, num, out)
 883 unsigned char *in;
 884 int num;
 885 unsigned char *out;
 886         {
 887         int j,i,k;
 888         unsigned int n=0,space=0;
 889         DES_LONG l;
 890         DES_LONG w,x,y,z;
 891         unsigned int blank=(unsigned int)'\n'-' ';
 892
 893         for (j=0; j<num; )
 894                 {
 895                 n= *(in++)-' ';
 896                 if (n == blank)
 897                         {
 898                         n=0;
 899                         in--;
 900                         }
 901                 if (n > 60)
 902                         {
 903                         fprintf(stderr,"uuencoded line length too long\n");
 904                         return(-1);
 905                         }
 906                 j++;
 907
 908                 for (i=0; i<n; j+=4,i+=3)
 909                         {
 910                         /* the following is for cases where spaces are
 911                          * removed from lines.
 912                          */
 913                         if (space)
 914                                 {
 915                                 w=x=y=z=0;
 916                                 }
 917                         else
 918                                 {
 919                                 w= *(in++)-' ';
 920                                 x= *(in++)-' ';
 921                                 y= *(in++)-' ';
 922                                 z= *(in++)-' ';
 923                                 }
 924                         if ((w > 63) || (x > 63) || (y > 63) || (z > 63))
 925                                 {
 926                                 k=0;
 927                                 if (w == blank) k=1;
 928                                 if (x == blank) k=2;
 929                                 if (y == blank) k=3;
 930                                 if (z == blank) k=4;
 931                                 space=1;
 932                                 switch (k) {
 933                                 case 1: w=0; in--;
 934                                 case 2: x=0; in--;
 935                                 case 3: y=0; in--;
 936                                 case 4: z=0; in--;
 937                                         break;
 938                                 case 0:
 939                                         space=0;
 940                                         fprintf(stderr,"bad uuencoded data values\n");
 941                                         w=x=y=z=0;
 942                                         return(-1);
 943                                         break;
 944                                         }
 945                                 }
 946                         l=(w<<18)|(x<<12)|(y<< 6)|(z    );
 947                         l2ccc(l,out);
 948                         }
 949                 if (*(in++) != '\n')
 950                         {
 951                         fprintf(stderr,"missing nl in uuencoded line\n");
 952                         w=x=y=z=0;
 953                         return(-1);
 954                         }
 955                 j++;
 956                 }
 957         *out='\0';
 958         w=x=y=z=0;
 959         return(n);
 960         }