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