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