apps/enc.c

   1 /* apps/enc.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 "apps.h"
  63 #include <openssl/bio.h>
  64 #include <openssl/err.h>
  65 #include <openssl/evp.h>
  66 #include <openssl/objects.h>
  67 #include <openssl/x509.h>
  68 #include <openssl/rand.h>
  69 #ifndef OPENSSL_NO_MD5
  70 #include <openssl/md5.h>
  71 #endif
  72 #include <openssl/pem.h>
  73 #include <openssl/engine.h>
  74 #include <ctype.h>
  75
  76 int set_hex(char *in,unsigned char *out,int size);
  77 #undef SIZE
  78 #undef BSIZE
  79 #undef PROG
  80
  81 #define SIZE    (512)
  82 #define BSIZE   (8*1024)
  83 #define PROG    enc_main
  84
  85 void show_ciphers(const OBJ_NAME *name,void *bio_)
  86         {
  87         BIO *bio=bio_;
  88         static int n;
  89
  90         if(!islower((unsigned char)*name->name))
  91                 return;
  92
  93         BIO_printf(bio,"-%-25s",name->name);
  94         if(++n == 3)
  95                 {
  96                 BIO_printf(bio,"\n");
  97                 n=0;
  98                 }
  99         else
 100                 BIO_printf(bio," ");
 101         }
 102
 103 int MAIN(int, char **);
 104
 105 int MAIN(int argc, char **argv)
 106         {
 107         ENGINE *e = NULL;
 108         static const char magic[]="Salted__";
 109         char mbuf[8];   /* should be 1 smaller than magic */
 110         char *strbuf=NULL;
 111         unsigned char *buff=NULL,*bufsize=NULL;
 112         int bsize=BSIZE,verbose=0;
 113         int ret=1,inl;
 114         int nopad = 0;
 115         unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH];
 116         unsigned char salt[PKCS5_SALT_LEN];
 117         char *str=NULL, *passarg = NULL, *pass = NULL;
 118         char *hkey=NULL,*hiv=NULL,*hsalt = NULL;
 119         int enc=1,printkey=0,i,base64=0;
 120         int debug=0,olb64=0,nosalt=0;
 121         const EVP_CIPHER *cipher=NULL,*c;
 122         char *inf=NULL,*outf=NULL;
 123         BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
 124 #define PROG_NAME_SIZE  16
 125         char pname[PROG_NAME_SIZE];
 126         char *engine = NULL;
 127
 128         apps_startup();
 129
 130         if (bio_err == NULL)
 131                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 132                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 133
 134         /* first check the program name */
 135         program_name(argv[0],pname,PROG_NAME_SIZE);
 136         if (strcmp(pname,"base64") == 0)
 137                 base64=1;
 138
 139         cipher=EVP_get_cipherbyname(pname);
 140         if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
 141                 {
 142                 BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
 143                 goto bad;
 144                 }
 145
 146         argc--;
 147         argv++;
 148         while (argc >= 1)
 149                 {
 150                 if      (strcmp(*argv,"-e") == 0)
 151                         enc=1;
 152                 else if (strcmp(*argv,"-in") == 0)
 153                         {
 154                         if (--argc < 1) goto bad;
 155                         inf= *(++argv);
 156                         }
 157                 else if (strcmp(*argv,"-out") == 0)
 158                         {
 159                         if (--argc < 1) goto bad;
 160                         outf= *(++argv);
 161                         }
 162                 else if (strcmp(*argv,"-pass") == 0)
 163                         {
 164                         if (--argc < 1) goto bad;
 165                         passarg= *(++argv);
 166                         }
 167                 else if (strcmp(*argv,"-engine") == 0)
 168                         {
 169                         if (--argc < 1) goto bad;
 170                         engine= *(++argv);
 171                         }
 172                 else if (strcmp(*argv,"-d") == 0)
 173                         enc=0;
 174                 else if (strcmp(*argv,"-p") == 0)
 175                         printkey=1;
 176                 else if (strcmp(*argv,"-v") == 0)
 177                         verbose=1;
 178                 else if (strcmp(*argv,"-nopad") == 0)
 179                         nopad=1;
 180                 else if (strcmp(*argv,"-salt") == 0)
 181                         nosalt=0;
 182                 else if (strcmp(*argv,"-nosalt") == 0)
 183                         nosalt=1;
 184                 else if (strcmp(*argv,"-debug") == 0)
 185                         debug=1;
 186                 else if (strcmp(*argv,"-P") == 0)
 187                         printkey=2;
 188                 else if (strcmp(*argv,"-A") == 0)
 189                         olb64=1;
 190                 else if (strcmp(*argv,"-a") == 0)
 191                         base64=1;
 192                 else if (strcmp(*argv,"-base64") == 0)
 193                         base64=1;
 194                 else if (strcmp(*argv,"-bufsize") == 0)
 195                         {
 196                         if (--argc < 1) goto bad;
 197                         bufsize=(unsigned char *)*(++argv);
 198                         }
 199                 else if (strcmp(*argv,"-k") == 0)
 200                         {
 201                         if (--argc < 1) goto bad;
 202                         str= *(++argv);
 203                         }
 204                 else if (strcmp(*argv,"-kfile") == 0)
 205                         {
 206                         static char buf[128];
 207                         FILE *infile;
 208                         char *file;
 209
 210                         if (--argc < 1) goto bad;
 211                         file= *(++argv);
 212                         infile=fopen(file,"r");
 213                         if (infile == NULL)
 214                                 {
 215                                 BIO_printf(bio_err,"unable to read key from '%s'\n",
 216                                         file);
 217                                 goto bad;
 218                                 }
 219                         buf[0]='\0';
 220                         fgets(buf,128,infile);
 221                         fclose(infile);
 222                         i=strlen(buf);
 223                         if ((i > 0) &&
 224                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 225                                 buf[--i]='\0';
 226                         if ((i > 0) &&
 227                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 228                                 buf[--i]='\0';
 229                         if (i < 1)
 230                                 {
 231                                 BIO_printf(bio_err,"zero length password\n");
 232                                 goto bad;
 233                                 }
 234                         str=buf;
 235                         }
 236                 else if (strcmp(*argv,"-K") == 0)
 237                         {
 238                         if (--argc < 1) goto bad;
 239                         hkey= *(++argv);
 240                         }
 241                 else if (strcmp(*argv,"-S") == 0)
 242                         {
 243                         if (--argc < 1) goto bad;
 244                         hsalt= *(++argv);
 245                         }
 246                 else if (strcmp(*argv,"-iv") == 0)
 247                         {
 248                         if (--argc < 1) goto bad;
 249                         hiv= *(++argv);
 250                         }
 251                 else if ((argv[0][0] == '-') &&
 252                         ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
 253                         {
 254                         cipher=c;
 255                         }
 256                 else if (strcmp(*argv,"-none") == 0)
 257                         cipher=NULL;
 258                 else
 259                         {
 260                         BIO_printf(bio_err,"unknown option '%s'\n",*argv);
 261 bad:
 262                         BIO_printf(bio_err,"options are\n");
 263                         BIO_printf(bio_err,"%-14s input file\n","-in <file>");
 264                         BIO_printf(bio_err,"%-14s output file\n","-out <file>");
 265                         BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>");
 266                         BIO_printf(bio_err,"%-14s encrypt\n","-e");
 267                         BIO_printf(bio_err,"%-14s decrypt\n","-d");
 268                         BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
 269                         BIO_printf(bio_err,"%-14s key is the next argument\n","-k");
 270                         BIO_printf(bio_err,"%-14s key is the first line of the file argument\n","-kfile");
 271                         BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
 272                         BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
 273                         BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
 274                         BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e");
 275
 276                         BIO_printf(bio_err,"Cipher Types\n");
 277                         OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
 278                                                show_ciphers,
 279                                                bio_err);
 280                         BIO_printf(bio_err,"\n");
 281
 282                         goto end;
 283                         }
 284                 argc--;
 285                 argv++;
 286                 }
 287
 288         if (engine != NULL)
 289                 {
 290                 if((e = ENGINE_by_id(engine)) == NULL)
 291                         {
 292                         BIO_printf(bio_err,"invalid engine \"%s\"\n",
 293                                 engine);
 294                         goto end;
 295                         }
 296                 if(!ENGINE_set_default(e, ENGINE_METHOD_ALL))
 297                         {
 298                         BIO_printf(bio_err,"can't use that engine\n");
 299                         goto end;
 300                         }
 301                 BIO_printf(bio_err,"engine \"%s\" set.\n", engine);
 302                 /* Free our "structural" reference. */
 303                 ENGINE_free(e);
 304                 }
 305
 306         if (bufsize != NULL)
 307                 {
 308                 unsigned long n;
 309
 310                 for (n=0; *bufsize; bufsize++)
 311                         {
 312                         i= *bufsize;
 313                         if ((i <= '9') && (i >= '0'))
 314                                 n=n*10+i-'0';
 315                         else if (i == 'k')
 316                                 {
 317                                 n*=1024;
 318                                 bufsize++;
 319                                 break;
 320                                 }
 321                         }
 322                 if (*bufsize != '\0')
 323                         {
 324                         BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
 325                         goto end;
 326                         }
 327
 328                 /* It must be large enough for a base64 encoded line */
 329                 if (n < 80) n=80;
 330
 331                 bsize=(int)n;
 332                 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
 333                 }
 334
 335         strbuf=OPENSSL_malloc(SIZE);
 336         buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize));
 337         if ((buff == NULL) || (strbuf == NULL))
 338                 {
 339                 BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
 340                 goto end;
 341                 }
 342
 343         in=BIO_new(BIO_s_file());
 344         out=BIO_new(BIO_s_file());
 345         if ((in == NULL) || (out == NULL))
 346                 {
 347                 ERR_print_errors(bio_err);
 348                 goto end;
 349                 }
 350         if (debug)
 351                 {
 352                 BIO_set_callback(in,BIO_debug_callback);
 353                 BIO_set_callback(out,BIO_debug_callback);
 354                 BIO_set_callback_arg(in,bio_err);
 355                 BIO_set_callback_arg(out,bio_err);
 356                 }
 357
 358         if (inf == NULL)
 359                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 360         else
 361                 {
 362                 if (BIO_read_filename(in,inf) <= 0)
 363                         {
 364                         perror(inf);
 365                         goto end;
 366                         }
 367                 }
 368
 369         if(!str && passarg) {
 370                 if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
 371                         BIO_printf(bio_err, "Error getting password\n");
 372                         goto end;
 373                 }
 374                 str = pass;
 375         }
 376
 377         if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
 378                 {
 379                 for (;;)
 380                         {
 381                         char buf[200];
 382
 383                         sprintf(buf,"enter %s %s password:",
 384                                 OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
 385                                 (enc)?"encryption":"decryption");
 386                         strbuf[0]='\0';
 387                         i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
 388                         if (i == 0)
 389                                 {
 390                                 if (strbuf[0] == '\0')
 391                                         {
 392                                         ret=1;
 393                                         goto end;
 394                                         }
 395                                 str=strbuf;
 396                                 break;
 397                                 }
 398                         if (i < 0)
 399                                 {
 400                                 BIO_printf(bio_err,"bad password read\n");
 401                                 goto end;
 402                                 }
 403                         }
 404                 }
 405
 406
 407         if (outf == NULL)
 408                 {
 409                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 410 #ifdef OPENSSL_SYS_VMS
 411                 {
 412                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 413                 out = BIO_push(tmpbio, out);
 414                 }
 415 #endif
 416                 }
 417         else
 418                 {
 419                 if (BIO_write_filename(out,outf) <= 0)
 420                         {
 421                         perror(outf);
 422                         goto end;
 423                         }
 424                 }
 425
 426         rbio=in;
 427         wbio=out;
 428
 429         if (base64)
 430                 {
 431                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
 432                         goto end;
 433                 if (debug)
 434                         {
 435                         BIO_set_callback(b64,BIO_debug_callback);
 436                         BIO_set_callback_arg(b64,bio_err);
 437                         }
 438                 if (olb64)
 439                         BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
 440                 if (enc)
 441                         wbio=BIO_push(b64,wbio);
 442                 else
 443                         rbio=BIO_push(b64,rbio);
 444                 }
 445
 446         if (cipher != NULL)
 447                 {
 448                 /* Note that str is NULL if a key was passed on the command
 449                  * line, so we get no salt in that case. Is this a bug?
 450                  */
 451                 if (str != NULL)
 452                         {
 453                         /* Salt handling: if encrypting generate a salt and
 454                          * write to output BIO. If decrypting read salt from
 455                          * input BIO.
 456                          */
 457                         unsigned char *sptr;
 458                         if(nosalt) sptr = NULL;
 459                         else {
 460                                 if(enc) {
 461                                         if(hsalt) {
 462                                                 if(!set_hex(hsalt,salt,PKCS5_SALT_LEN)) {
 463                                                         BIO_printf(bio_err,
 464                                                                 "invalid hex salt value\n");
 465                                                         goto end;
 466                                                 }
 467                                         } else if (RAND_pseudo_bytes(salt, PKCS5_SALT_LEN) < 0)
 468                                                 goto end;
 469                                         /* If -P option then don't bother writing */
 470                                         if((printkey != 2)
 471                                            && (BIO_write(wbio,magic,
 472                                                          sizeof magic-1) != sizeof magic-1
 473                                                || BIO_write(wbio,
 474                                                             (char *)salt,
 475                                                             PKCS5_SALT_LEN) != PKCS5_SALT_LEN)) {
 476                                                 BIO_printf(bio_err,"error writing output file\n");
 477                                                 goto end;
 478                                         }
 479                                 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
 480                                           || BIO_read(rbio,
 481                                                       (unsigned char *)salt,
 482                                     PKCS5_SALT_LEN) != PKCS5_SALT_LEN) {
 483                                         BIO_printf(bio_err,"error reading input file\n");
 484                                         goto end;
 485                                 } else if(memcmp(mbuf,magic,sizeof magic-1)) {
 486                                     BIO_printf(bio_err,"bad magic number\n");
 487                                     goto end;
 488                                 }
 489
 490                                 sptr = salt;
 491                         }
 492
 493                         EVP_BytesToKey(cipher,EVP_md5(),sptr,
 494                                 (unsigned char *)str,
 495                                 strlen(str),1,key,iv);
 496                         /* zero the complete buffer or the string
 497                          * passed from the command line
 498                          * bug picked up by
 499                          * Larry J. Hughes Jr. <hughes@indiana.edu> */
 500                         if (str == strbuf)
 501                                 memset(str,0,SIZE);
 502                         else
 503                                 memset(str,0,strlen(str));
 504                         }
 505                 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv))
 506                         {
 507                         BIO_printf(bio_err,"invalid hex iv value\n");
 508                         goto end;
 509                         }
 510                 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key))
 511                         {
 512                         BIO_printf(bio_err,"invalid hex key value\n");
 513                         goto end;
 514                         }
 515
 516                 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
 517                         goto end;
 518                 BIO_set_cipher(benc,cipher,key,iv,enc);
 519                 if (nopad)
 520                         {
 521                         EVP_CIPHER_CTX *ctx;
 522                         BIO_get_cipher_ctx(benc, &ctx);
 523                         EVP_CIPHER_CTX_set_padding(ctx, 0);
 524                         }
 525                 if (debug)
 526                         {
 527                         BIO_set_callback(benc,BIO_debug_callback);
 528                         BIO_set_callback_arg(benc,bio_err);
 529                         }
 530
 531                 if (printkey)
 532                         {
 533                         if (!nosalt)
 534                                 {
 535                                 printf("salt=");
 536                                 for (i=0; i<PKCS5_SALT_LEN; i++)
 537                                         printf("%02X",salt[i]);
 538                                 printf("\n");
 539                                 }
 540                         if (cipher->key_len > 0)
 541                                 {
 542                                 printf("key=");
 543                                 for (i=0; i<cipher->key_len; i++)
 544                                         printf("%02X",key[i]);
 545                                 printf("\n");
 546                                 }
 547                         if (cipher->iv_len > 0)
 548                                 {
 549                                 printf("iv =");
 550                                 for (i=0; i<cipher->iv_len; i++)
 551                                         printf("%02X",iv[i]);
 552                                 printf("\n");
 553                                 }
 554                         if (printkey == 2)
 555                                 {
 556                                 ret=0;
 557                                 goto end;
 558                                 }
 559                         }
 560                 }
 561
 562         /* Only encrypt/decrypt as we write the file */
 563         if (benc != NULL)
 564                 wbio=BIO_push(benc,wbio);
 565
 566         for (;;)
 567                 {
 568                 inl=BIO_read(rbio,(char *)buff,bsize);
 569                 if (inl <= 0) break;
 570                 if (BIO_write(wbio,(char *)buff,inl) != inl)
 571                         {
 572                         BIO_printf(bio_err,"error writing output file\n");
 573                         goto end;
 574                         }
 575                 }
 576         if (!BIO_flush(wbio))
 577                 {
 578                 BIO_printf(bio_err,"bad decrypt\n");
 579                 goto end;
 580                 }
 581
 582         ret=0;
 583         if (verbose)
 584                 {
 585                 BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
 586                 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
 587                 }
 588 end:
 589         ERR_print_errors(bio_err);
 590         if (strbuf != NULL) OPENSSL_free(strbuf);
 591         if (buff != NULL) OPENSSL_free(buff);
 592         if (in != NULL) BIO_free(in);
 593         if (out != NULL) BIO_free_all(out);
 594         if (benc != NULL) BIO_free(benc);
 595         if (b64 != NULL) BIO_free(b64);
 596         if(pass) OPENSSL_free(pass);
 597         EXIT(ret);
 598         }
 599
 600 int set_hex(char *in, unsigned char *out, int size)
 601         {
 602         int i,n;
 603         unsigned char j;
 604
 605         n=strlen(in);
 606         if (n > (size*2))
 607                 {
 608                 BIO_printf(bio_err,"hex string is too long\n");
 609                 return(0);
 610                 }
 611         memset(out,0,size);
 612         for (i=0; i<n; i++)
 613                 {
 614                 j=(unsigned char)*in;
 615                 *(in++)='\0';
 616                 if (j == 0) break;
 617                 if ((j >= '0') && (j <= '9'))
 618                         j-='0';
 619                 else if ((j >= 'A') && (j <= 'F'))
 620                         j=j-'A'+10;
 621                 else if ((j >= 'a') && (j <= 'f'))
 622                         j=j-'a'+10;
 623                 else
 624                         {
 625                         BIO_printf(bio_err,"non-hex digit\n");
 626                         return(0);
 627                         }
 628                 if (i&1)
 629                         out[i/2]|=j;
 630                 else
 631                         out[i/2]=(j<<4);
 632                 }
 633         return(1);
 634         }