crypto/des/des.c

   1 /* crypto/des/des.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #ifndef MSDOS
  62 #ifndef VMS
  63 #include <openssl/opensslconf.h>
  64 #include OPENSSL_UNISTD
  65 #else /* VMS */
  66 #ifdef __DECC
  67 #include <unistd.h>
  68 #else /* not __DECC */
  69 #include <math.h>
  70 #endif /* __DECC */
  71 #endif /* VMS */
  72 #else
  73 #include <io.h>
  74 #endif
  75
  76 #include <time.h>
  77 #include "des_ver.h"
  78
  79 #ifdef VMS
  80 #include <types.h>
  81 #include <stat.h>
  82 #else
  83 #ifndef _IRIX
  84 #include <sys/types.h>
  85 #endif
  86 #include <sys/stat.h>
  87 #endif
  88 #include <openssl/des.h>
  89 #include <openssl/rand.h>
  90
  91 #if defined(__STDC__) || defined(VMS) || defined(M_XENIX) || defined(MSDOS)
  92 #include <string.h>
  93 #endif
  94
  95 void usage(void);
  96 void doencryption(void);
  97 int uufwrite(unsigned char *data, int size, unsigned int num, FILE *fp);
  98 void uufwriteEnd(FILE *fp);
  99 int uufread(unsigned char *out,int size,unsigned int num,FILE *fp);
 100 int uuencode(unsigned char *in,int num,unsigned char *out);
 101 int uudecode(unsigned char *in,int num,unsigned char *out);
 102 void des_3cbc_encrypt(des_cblock *input,des_cblock *output,long length,
 103         des_key_schedule sk1,des_key_schedule sk2,
 104         des_cblock *ivec1,des_cblock *ivec2,int enc);
 105 #ifdef VMS
 106 #define EXIT(a) exit(a&0x10000000L)
 107 #else
 108 #define EXIT(a) exit(a)
 109 #endif
 110
 111 #define BUFSIZE (8*1024)
 112 #define VERIFY  1
 113 #define KEYSIZ  8
 114 #define KEYSIZB 1024 /* should hit tty line limit first :-) */
 115 char key[KEYSIZB+1];
 116 int do_encrypt,longk=0;
 117 FILE *DES_IN,*DES_OUT,*CKSUM_OUT;
 118 char uuname[200];
 119 unsigned char uubuf[50];
 120 int uubufnum=0;
 121 #define INUUBUFN        (45*100)
 122 #define OUTUUBUF        (65*100)
 123 unsigned char b[OUTUUBUF];
 124 unsigned char bb[300];
 125 des_cblock cksum={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
 126 char cksumname[200]="";
 127
 128 int vflag,cflag,eflag,dflag,kflag,bflag,fflag,sflag,uflag,flag3,hflag,error;
 129
 130 int main(int argc, char **argv)
 131         {
 132         int i;
 133         struct stat ins,outs;
 134         char *p;
 135         char *in=NULL,*out=NULL;
 136
 137         vflag=cflag=eflag=dflag=kflag=hflag=bflag=fflag=sflag=uflag=flag3=0;
 138         error=0;
 139         memset(key,0,sizeof(key));
 140
 141         for (i=1; i<argc; i++)
 142                 {
 143                 p=argv[i];
 144                 if ((p[0] == '-') && (p[1] != '\0'))
 145                         {
 146                         p++;
 147                         while (*p)
 148                                 {
 149                                 switch (*(p++))
 150                                         {
 151                                 case '3':
 152                                         flag3=1;
 153                                         longk=1;
 154                                         break;
 155                                 case 'c':
 156                                         cflag=1;
 157                                         strncpy(cksumname,p,200);
 158                                         p+=strlen(cksumname);
 159                                         break;
 160                                 case 'C':
 161                                         cflag=1;
 162                                         longk=1;
 163                                         strncpy(cksumname,p,200);
 164                                         p+=strlen(cksumname);
 165                                         break;
 166                                 case 'e':
 167                                         eflag=1;
 168                                         break;
 169                                 case 'v':
 170                                         vflag=1;
 171                                         break;
 172                                 case 'E':
 173                                         eflag=1;
 174                                         longk=1;
 175                                         break;
 176                                 case 'd':
 177                                         dflag=1;
 178                                         break;
 179                                 case 'D':
 180                                         dflag=1;
 181                                         longk=1;
 182                                         break;
 183                                 case 'b':
 184                                         bflag=1;
 185                                         break;
 186                                 case 'f':
 187                                         fflag=1;
 188                                         break;
 189                                 case 's':
 190                                         sflag=1;
 191                                         break;
 192                                 case 'u':
 193                                         uflag=1;
 194                                         strncpy(uuname,p,200);
 195                                         p+=strlen(uuname);
 196                                         break;
 197                                 case 'h':
 198                                         hflag=1;
 199                                         break;
 200                                 case 'k':
 201                                         kflag=1;
 202                                         if ((i+1) == argc)
 203                                                 {
 204                                                 fputs("must have a key with the -k option\n",stderr);
 205                                                 error=1;
 206                                                 }
 207                                         else
 208                                                 {
 209                                                 int j;
 210
 211                                                 i++;
 212                                                 strncpy(key,argv[i],KEYSIZB);
 213                                                 for (j=strlen(argv[i])-1; j>=0; j--)
 214                                                         argv[i][j]='\0';
 215                                                 }
 216                                         break;
 217                                 default:
 218                                         fprintf(stderr,"'%c' unknown flag\n",p[-1]);
 219                                         error=1;
 220                                         break;
 221                                         }
 222                                 }
 223                         }
 224                 else
 225                         {
 226                         if (in == NULL)
 227                                 in=argv[i];
 228                         else if (out == NULL)
 229                                 out=argv[i];
 230                         else
 231                                 error=1;
 232                         }
 233                 }
 234         if (error) usage();
 235         /* We either
 236          * do checksum or
 237          * do encrypt or
 238          * do decrypt or
 239          * do decrypt then ckecksum or
 240          * do checksum then encrypt
 241          */
 242         if (((eflag+dflag) == 1) || cflag)
 243                 {
 244                 if (eflag) do_encrypt=DES_ENCRYPT;
 245                 if (dflag) do_encrypt=DES_DECRYPT;
 246                 }
 247         else
 248                 {
 249                 if (vflag)
 250                         {
 251 #ifndef _Windows
 252                         fprintf(stderr,"des(1) built with %s\n",libdes_version);
 253 #endif
 254                         EXIT(1);
 255                         }
 256                 else usage();
 257                 }
 258
 259 #ifndef _Windows
 260         if (vflag) fprintf(stderr,"des(1) built with %s\n",libdes_version);
 261 #endif
 262         if (    (in != NULL) &&
 263                 (out != NULL) &&
 264 #ifndef MSDOS
 265                 (stat(in,&ins) != -1) &&
 266                 (stat(out,&outs) != -1) &&
 267                 (ins.st_dev == outs.st_dev) &&
 268                 (ins.st_ino == outs.st_ino))
 269 #else /* MSDOS */
 270                 (strcmp(in,out) == 0))
 271 #endif
 272                         {
 273                         fputs("input and output file are the same\n",stderr);
 274                         EXIT(3);
 275                         }
 276
 277         if (!kflag)
 278                 if (des_read_pw_string(key,KEYSIZB+1,"Enter key:",eflag?VERIFY:0))
 279                         {
 280                         fputs("password error\n",stderr);
 281                         EXIT(2);
 282                         }
 283
 284         if (in == NULL)
 285                 DES_IN=stdin;
 286         else if ((DES_IN=fopen(in,"r")) == NULL)
 287                 {
 288                 perror("opening input file");
 289                 EXIT(4);
 290                 }
 291
 292         CKSUM_OUT=stdout;
 293         if (out == NULL)
 294                 {
 295                 DES_OUT=stdout;
 296                 CKSUM_OUT=stderr;
 297                 }
 298         else if ((DES_OUT=fopen(out,"w")) == NULL)
 299                 {
 300                 perror("opening output file");
 301                 EXIT(5);
 302                 }
 303
 304 #ifdef MSDOS
 305         /* This should set the file to binary mode. */
 306         {
 307 #include <fcntl.h>
 308         if (!(uflag && dflag))
 309                 setmode(fileno(DES_IN),O_BINARY);
 310         if (!(uflag && eflag))
 311                 setmode(fileno(DES_OUT),O_BINARY);
 312         }
 313 #endif
 314
 315         doencryption();
 316         fclose(DES_IN);
 317         fclose(DES_OUT);
 318         EXIT(0);
 319         }
 320
 321 void usage(void)
 322         {
 323         char **u;
 324         static const char *Usage[]={
 325 "des <options> [input-file [output-file]]",
 326 "options:",
 327 "-v         : des(1) version number",
 328 "-e         : encrypt using sunOS compatible user key to DES key conversion.",
 329 "-E         : encrypt ",
 330 "-d         : decrypt using sunOS compatible user key to DES key conversion.",
 331 "-D         : decrypt ",
 332 "-c[ckname] : generate a cbc_cksum using sunOS compatible user key to",
 333 "             DES key conversion and output to ckname (stdout default,",
 334 "             stderr if data being output on stdout).  The checksum is",
 335 "             generated before encryption and after decryption if used",
 336 "             in conjunction with -[eEdD].",
 337 "-C[ckname] : generate a cbc_cksum as for -c but compatible with -[ED].",
 338 "-k key     : use key 'key'",
 339 "-h         : the key that is entered will be a hexadecimal number",
 340 "             that is used directly as the des key",
 341 "-u[uuname] : input file is uudecoded if -[dD] or output uuencoded data if -[eE]",
 342 "             (uuname is the filename to put in the uuencode header).",
 343 "-b         : encrypt using DES in ecb encryption mode, the defaut is cbc mode.",
 344 "-3         : encrypt using tripple DES encryption.  This uses 2 keys",
 345 "             generated from the input key.  If the input key is less",
 346 "             than 8 characters long, this is equivelent to normal",
 347 "             encryption.  Default is triple cbc, -b makes it triple ecb.",
 348 NULL
 349 };
 350         for (u=(char **)Usage; *u; u++)
 351                 {
 352                 fputs(*u,stderr);
 353                 fputc('\n',stderr);
 354                 }
 355
 356         EXIT(1);
 357         }
 358
 359 void doencryption(void)
 360         {
 361 #ifdef _LIBC
 362         extern unsigned long time();
 363 #endif
 364
 365         register int i;
 366         des_key_schedule ks,ks2;
 367         des_cblock iv,iv2;
 368         char *p;
 369         int num=0,j,k,l,rem,ll,len,last,ex=0;
 370         des_cblock kk,k2;
 371         FILE *O;
 372         int Exit=0;
 373 #ifndef MSDOS
 374         static unsigned char buf[BUFSIZE+8],obuf[BUFSIZE+8];
 375 #else
 376         static unsigned char *buf=NULL,*obuf=NULL;
 377
 378         if (buf == NULL)
 379                 {
 380                 if (    (( buf=Malloc(BUFSIZE+8)) == NULL) ||
 381                         ((obuf=Malloc(BUFSIZE+8)) == NULL))
 382                         {
 383                         fputs("Not enough memory\n",stderr);
 384                         Exit=10;
 385                         goto problems;
 386                         }
 387                 }
 388 #endif
 389
 390         if (hflag)
 391                 {
 392                 j=(flag3?16:8);
 393                 p=key;
 394                 for (i=0; i<j; i++)
 395                         {
 396                         k=0;
 397                         if ((*p <= '9') && (*p >= '0'))
 398                                 k=(*p-'0')<<4;
 399                         else if ((*p <= 'f') && (*p >= 'a'))
 400                                 k=(*p-'a'+10)<<4;
 401                         else if ((*p <= 'F') && (*p >= 'A'))
 402                                 k=(*p-'A'+10)<<4;
 403                         else
 404                                 {
 405                                 fputs("Bad hex key\n",stderr);
 406                                 Exit=9;
 407                                 goto problems;
 408                                 }
 409                         p++;
 410                         if ((*p <= '9') && (*p >= '0'))
 411                                 k|=(*p-'0');
 412                         else if ((*p <= 'f') && (*p >= 'a'))
 413                                 k|=(*p-'a'+10);
 414                         else if ((*p <= 'F') && (*p >= 'A'))
 415                                 k|=(*p-'A'+10);
 416                         else
 417                                 {
 418                                 fputs("Bad hex key\n",stderr);
 419                                 Exit=9;
 420                                 goto problems;
 421                                 }
 422                         p++;
 423                         if (i < 8)
 424                                 kk[i]=k;
 425                         else
 426                                 k2[i-8]=k;
 427                         }
 428                 des_set_key_unchecked(&k2,ks2);
 429                 memset(k2,0,sizeof(k2));
 430                 }
 431         else if (longk || flag3)
 432                 {
 433                 if (flag3)
 434                         {
 435                         des_string_to_2keys(key,&kk,&k2);
 436                         des_set_key_unchecked(&k2,ks2);
 437                         memset(k2,0,sizeof(k2));
 438                         }
 439                 else
 440                         des_string_to_key(key,&kk);
 441                 }
 442         else
 443                 for (i=0; i<KEYSIZ; i++)
 444                         {
 445                         l=0;
 446                         k=key[i];
 447                         for (j=0; j<8; j++)
 448                                 {
 449                                 if (k&1) l++;
 450                                 k>>=1;
 451                                 }
 452                         if (l & 1)
 453                                 kk[i]=key[i]&0x7f;
 454                         else
 455                                 kk[i]=key[i]|0x80;
 456                         }
 457
 458         des_set_key_unchecked(&kk,ks);
 459         memset(key,0,sizeof(key));
 460         memset(kk,0,sizeof(kk));
 461         /* woops - A bug that does not showup under unix :-( */
 462         memset(iv,0,sizeof(iv));
 463         memset(iv2,0,sizeof(iv2));
 464
 465         l=1;
 466         rem=0;
 467         /* first read */
 468         if (eflag || (!dflag && cflag))
 469                 {
 470                 for (;;)
 471                         {
 472                         num=l=fread(&(buf[rem]),1,BUFSIZE,DES_IN);
 473                         l+=rem;
 474                         num+=rem;
 475                         if (l < 0)
 476                                 {
 477                                 perror("read error");
 478                                 Exit=6;
 479                                 goto problems;
 480                                 }
 481
 482                         rem=l%8;
 483                         len=l-rem;
 484                         if (feof(DES_IN))
 485                                 {
 486                                 for (i=7-rem; i>0; i--)
 487                                         RAND_pseudo_bytes(buf + l++, 1);
 488                                 buf[l++]=rem;
 489                                 ex=1;
 490                                 len+=rem;
 491                                 }
 492                         else
 493                                 l-=rem;
 494
 495                         if (cflag)
 496                                 {
 497                                 des_cbc_cksum(buf,&cksum,
 498                                         (long)len,ks,&cksum);
 499                                 if (!eflag)
 500                                         {
 501                                         if (feof(DES_IN)) break;
 502                                         else continue;
 503                                         }
 504                                 }
 505
 506                         if (bflag && !flag3)
 507                                 for (i=0; i<l; i+=8)
 508                                         des_ecb_encrypt(
 509                                                 (des_cblock *)&(buf[i]),
 510                                                 (des_cblock *)&(obuf[i]),
 511                                                 ks,do_encrypt);
 512                         else if (flag3 && bflag)
 513                                 for (i=0; i<l; i+=8)
 514                                         des_ecb2_encrypt(
 515                                                 (des_cblock *)&(buf[i]),
 516                                                 (des_cblock *)&(obuf[i]),
 517                                                 ks,ks2,do_encrypt);
 518                         else if (flag3 && !bflag)
 519                                 {
 520                                 char tmpbuf[8];
 521
 522                                 if (rem) memcpy(tmpbuf,&(buf[l]),
 523                                         (unsigned int)rem);
 524                                 des_3cbc_encrypt(
 525                                         (des_cblock *)buf,(des_cblock *)obuf,
 526                                         (long)l,ks,ks2,&iv,
 527                                         &iv2,do_encrypt);
 528                                 if (rem) memcpy(&(buf[l]),tmpbuf,
 529                                         (unsigned int)rem);
 530                                 }
 531                         else
 532                                 {
 533                                 des_cbc_encrypt(
 534                                         buf,obuf,
 535                                         (long)l,ks,&iv,do_encrypt);
 536                                 if (l >= 8) memcpy(iv,&(obuf[l-8]),8);
 537                                 }
 538                         if (rem) memcpy(buf,&(buf[l]),(unsigned int)rem);
 539
 540                         i=0;
 541                         while (i < l)
 542                                 {
 543                                 if (uflag)
 544                                         j=uufwrite(obuf,1,(unsigned int)l-i,
 545                                                 DES_OUT);
 546                                 else
 547                                         j=fwrite(obuf,1,(unsigned int)l-i,
 548                                                 DES_OUT);
 549                                 if (j == -1)
 550                                         {
 551                                         perror("Write error");
 552                                         Exit=7;
 553                                         goto problems;
 554                                         }
 555                                 i+=j;
 556                                 }
 557                         if (feof(DES_IN))
 558                                 {
 559                                 if (uflag) uufwriteEnd(DES_OUT);
 560                                 break;
 561                                 }
 562                         }
 563                 }
 564         else /* decrypt */
 565                 {
 566                 ex=1;
 567                 for (;;)
 568                         {
 569                         if (ex) {
 570                                 if (uflag)
 571                                         l=uufread(buf,1,BUFSIZE,DES_IN);
 572                                 else
 573                                         l=fread(buf,1,BUFSIZE,DES_IN);
 574                                 ex=0;
 575                                 rem=l%8;
 576                                 l-=rem;
 577                                 }
 578                         if (l < 0)
 579                                 {
 580                                 perror("read error");
 581                                 Exit=6;
 582                                 goto problems;
 583                                 }
 584
 585                         if (bflag && !flag3)
 586                                 for (i=0; i<l; i+=8)
 587                                         des_ecb_encrypt(
 588                                                 (des_cblock *)&(buf[i]),
 589                                                 (des_cblock *)&(obuf[i]),
 590                                                 ks,do_encrypt);
 591                         else if (flag3 && bflag)
 592                                 for (i=0; i<l; i+=8)
 593                                         des_ecb2_encrypt(
 594                                                 (des_cblock *)&(buf[i]),
 595                                                 (des_cblock *)&(obuf[i]),
 596                                                 ks,ks2,do_encrypt);
 597                         else if (flag3 && !bflag)
 598                                 {
 599                                 des_3cbc_encrypt(
 600                                         (des_cblock *)buf,(des_cblock *)obuf,
 601                                         (long)l,ks,ks2,&iv,
 602                                         &iv2,do_encrypt);
 603                                 }
 604                         else
 605                                 {
 606                                 des_cbc_encrypt(
 607                                         buf,obuf,
 608                                         (long)l,ks,&iv,do_encrypt);
 609                                 if (l >= 8) memcpy(iv,&(buf[l-8]),8);
 610                                 }
 611
 612                         if (uflag)
 613                                 ll=uufread(&(buf[rem]),1,BUFSIZE,DES_IN);
 614                         else
 615                                 ll=fread(&(buf[rem]),1,BUFSIZE,DES_IN);
 616                         ll+=rem;
 617                         rem=ll%8;
 618                         ll-=rem;
 619                         if (feof(DES_IN) && (ll == 0))
 620                                 {
 621                                 last=obuf[l-1];
 622
 623                                 if ((last > 7) || (last < 0))
 624                                         {
 625                                         fputs("The file was not decrypted correctly.\n",
 626                                                 stderr);
 627                                         Exit=8;
 628                                         last=0;
 629                                         }
 630                                 l=l-8+last;
 631                                 }
 632                         i=0;
 633                         if (cflag) des_cbc_cksum(obuf,
 634                                 (des_cblock *)cksum,(long)l/8*8,ks,
 635                                 (des_cblock *)cksum);
 636                         while (i != l)
 637                                 {
 638                                 j=fwrite(obuf,1,(unsigned int)l-i,DES_OUT);
 639                                 if (j == -1)
 640                                         {
 641                                         perror("Write error");
 642                                         Exit=7;
 643                                         goto problems;
 644                                         }
 645                                 i+=j;
 646                                 }
 647                         l=ll;
 648                         if ((l == 0) && feof(DES_IN)) break;
 649                         }
 650                 }
 651         if (cflag)
 652                 {
 653                 l=0;
 654                 if (cksumname[0] != '\0')
 655                         {
 656                         if ((O=fopen(cksumname,"w")) != NULL)
 657                                 {
 658                                 CKSUM_OUT=O;
 659                                 l=1;
 660                                 }
 661                         }
 662                 for (i=0; i<8; i++)
 663                         fprintf(CKSUM_OUT,"%02X",cksum[i]);
 664                 fprintf(CKSUM_OUT,"\n");
 665                 if (l) fclose(CKSUM_OUT);
 666                 }
 667 problems:
 668         memset(buf,0,sizeof(buf));
 669         memset(obuf,0,sizeof(obuf));
 670         memset(ks,0,sizeof(ks));
 671         memset(ks2,0,sizeof(ks2));
 672         memset(iv,0,sizeof(iv));
 673         memset(iv2,0,sizeof(iv2));
 674         memset(kk,0,sizeof(kk));
 675         memset(k2,0,sizeof(k2));
 676         memset(uubuf,0,sizeof(uubuf));
 677         memset(b,0,sizeof(b));
 678         memset(bb,0,sizeof(bb));
 679         memset(cksum,0,sizeof(cksum));
 680         if (Exit) EXIT(Exit);
 681         }
 682
 683 /*    We ignore this parameter but it should be > ~50 I believe    */
 684 int uufwrite(unsigned char *data, int size, unsigned int num, FILE *fp)
 685         {
 686         int i,j,left,rem,ret=num;
 687         static int start=1;
 688
 689         if (start)
 690                 {
 691                 fprintf(fp,"begin 600 %s\n",
 692                         (uuname[0] == '\0')?"text.d":uuname);
 693                 start=0;
 694                 }
 695
 696         if (uubufnum)
 697                 {
 698                 if (uubufnum+num < 45)
 699                         {
 700                         memcpy(&(uubuf[uubufnum]),data,(unsigned int)num);
 701                         uubufnum+=num;
 702                         return(num);
 703                         }
 704                 else
 705                         {
 706                         i=45-uubufnum;
 707                         memcpy(&(uubuf[uubufnum]),data,(unsigned int)i);
 708                         j=uuencode((unsigned char *)uubuf,45,b);
 709                         fwrite(b,1,(unsigned int)j,fp);
 710                         uubufnum=0;
 711                         data+=i;
 712                         num-=i;
 713                         }
 714                 }
 715
 716         for (i=0; i<(((int)num)-INUUBUFN); i+=INUUBUFN)
 717                 {
 718                 j=uuencode(&(data[i]),INUUBUFN,b);
 719                 fwrite(b,1,(unsigned int)j,fp);
 720                 }
 721         rem=(num-i)%45;
 722         left=(num-i-rem);
 723         if (left)
 724                 {
 725                 j=uuencode(&(data[i]),left,b);
 726                 fwrite(b,1,(unsigned int)j,fp);
 727                 i+=left;
 728                 }
 729         if (i != num)
 730                 {
 731                 memcpy(uubuf,&(data[i]),(unsigned int)rem);
 732                 uubufnum=rem;
 733                 }
 734         return(ret);
 735         }
 736
 737 void uufwriteEnd(FILE *fp)
 738         {
 739         int j;
 740         static const char *end=" \nend\n";
 741
 742         if (uubufnum != 0)
 743                 {
 744                 uubuf[uubufnum]='\0';
 745                 uubuf[uubufnum+1]='\0';
 746                 uubuf[uubufnum+2]='\0';
 747                 j=uuencode(uubuf,uubufnum,b);
 748                 fwrite(b,1,(unsigned int)j,fp);
 749                 }
 750         fwrite(end,1,strlen(end),fp);
 751         }
 752
 753 /* int size:  should always be > ~ 60; I actually ignore this parameter :-)    */
 754 int uufread(unsigned char *out, int size, unsigned int num, FILE *fp)
 755         {
 756         int i,j,tot;
 757         static int done=0;
 758         static int valid=0;
 759         static int start=1;
 760
 761         if (start)
 762                 {
 763                 for (;;)
 764                         {
 765                         b[0]='\0';
 766                         fgets((char *)b,300,fp);
 767                         if (b[0] == '\0')
 768                                 {
 769                                 fprintf(stderr,"no 'begin' found in uuencoded input\n");
 770                                 return(-1);
 771                                 }
 772                         if (strncmp((char *)b,"begin ",6) == 0) break;
 773                         }
 774                 start=0;
 775                 }
 776         if (done) return(0);
 777         tot=0;
 778         if (valid)
 779                 {
 780                 memcpy(out,bb,(unsigned int)valid);
 781                 tot=valid;
 782                 valid=0;
 783                 }
 784         for (;;)
 785                 {
 786                 b[0]='\0';
 787                 fgets((char *)b,300,fp);
 788                 if (b[0] == '\0') break;
 789                 i=strlen((char *)b);
 790                 if ((b[0] == 'e') && (b[1] == 'n') && (b[2] == 'd'))
 791                         {
 792                         done=1;
 793                         while (!feof(fp))
 794                                 {
 795                                 fgets((char *)b,300,fp);
 796                                 }
 797                         break;
 798                         }
 799                 i=uudecode(b,i,bb);
 800                 if (i < 0) break;
 801                 if ((i+tot+8) > num)
 802                         {
 803                         /* num to copy to make it a multiple of 8 */
 804                         j=(num/8*8)-tot-8;
 805                         memcpy(&(out[tot]),bb,(unsigned int)j);
 806                         tot+=j;
 807                         memcpy(bb,&(bb[j]),(unsigned int)i-j);
 808                         valid=i-j;
 809                         break;
 810                         }
 811                 memcpy(&(out[tot]),bb,(unsigned int)i);
 812                 tot+=i;
 813                 }
 814         return(tot);
 815         }
 816
 817 #define ccc2l(c,l)      (l =((DES_LONG)(*((c)++)))<<16, \
 818                          l|=((DES_LONG)(*((c)++)))<< 8, \
 819                          l|=((DES_LONG)(*((c)++))))
 820
 821 #define l2ccc(l,c)      (*((c)++)=(unsigned char)(((l)>>16)&0xff), \
 822                     *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
 823                     *((c)++)=(unsigned char)(((l)    )&0xff))
 824
 825
 826 int uuencode(unsigned char *in, int num, unsigned char *out)
 827         {
 828         int j,i,n,tot=0;
 829         DES_LONG l;
 830         register unsigned char *p;
 831         p=out;
 832
 833         for (j=0; j<num; j+=45)
 834                 {
 835                 if (j+45 > num)
 836                         i=(num-j);
 837                 else    i=45;
 838                 *(p++)=i+' ';
 839                 for (n=0; n<i; n+=3)
 840                         {
 841                         ccc2l(in,l);
 842                         *(p++)=((l>>18)&0x3f)+' ';
 843                         *(p++)=((l>>12)&0x3f)+' ';
 844                         *(p++)=((l>> 6)&0x3f)+' ';
 845                         *(p++)=((l    )&0x3f)+' ';
 846                         tot+=4;
 847                         }
 848                 *(p++)='\n';
 849                 tot+=2;
 850                 }
 851         *p='\0';
 852         l=0;
 853         return(tot);
 854         }
 855
 856 int uudecode(unsigned char *in, int num, unsigned char *out)
 857         {
 858         int j,i,k;
 859         unsigned int n=0,space=0;
 860         DES_LONG l;
 861         DES_LONG w,x,y,z;
 862         unsigned int blank=(unsigned int)'\n'-' ';
 863
 864         for (j=0; j<num; )
 865                 {
 866                 n= *(in++)-' ';
 867                 if (n == blank)
 868                         {
 869                         n=0;
 870                         in--;
 871                         }
 872                 if (n > 60)
 873                         {
 874                         fprintf(stderr,"uuencoded line length too long\n");
 875                         return(-1);
 876                         }
 877                 j++;
 878
 879                 for (i=0; i<n; j+=4,i+=3)
 880                         {
 881                         /* the following is for cases where spaces are
 882                          * removed from lines.
 883                          */
 884                         if (space)
 885                                 {
 886                                 w=x=y=z=0;
 887                                 }
 888                         else
 889                                 {
 890                                 w= *(in++)-' ';
 891                                 x= *(in++)-' ';
 892                                 y= *(in++)-' ';
 893                                 z= *(in++)-' ';
 894                                 }
 895                         if ((w > 63) || (x > 63) || (y > 63) || (z > 63))
 896                                 {
 897                                 k=0;
 898                                 if (w == blank) k=1;
 899                                 if (x == blank) k=2;
 900                                 if (y == blank) k=3;
 901                                 if (z == blank) k=4;
 902                                 space=1;
 903                                 switch (k) {
 904                                 case 1: w=0; in--;
 905                                 case 2: x=0; in--;
 906                                 case 3: y=0; in--;
 907                                 case 4: z=0; in--;
 908                                         break;
 909                                 case 0:
 910                                         space=0;
 911                                         fprintf(stderr,"bad uuencoded data values\n");
 912                                         w=x=y=z=0;
 913                                         return(-1);
 914                                         break;
 915                                         }
 916                                 }
 917                         l=(w<<18)|(x<<12)|(y<< 6)|(z    );
 918                         l2ccc(l,out);
 919                         }
 920                 if (*(in++) != '\n')
 921                         {
 922                         fprintf(stderr,"missing nl in uuencoded line\n");
 923                         w=x=y=z=0;
 924                         return(-1);
 925                         }
 926                 j++;
 927                 }
 928         *out='\0';
 929         w=x=y=z=0;
 930         return(n);
 931         }