crypto/openssl/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 #include <openssl/pem.h>
  70 #include <ctype.h>
  71
  72 int set_hex(char *in,unsigned char *out,int size);
  73 #undef SIZE
  74 #undef BSIZE
  75 #undef PROG
  76
  77 #define SIZE    (512)
  78 #define BSIZE   (8*1024)
  79 #define PROG    enc_main
  80
  81 static void show_ciphers(const OBJ_NAME *name,void *bio_)
  82         {
  83         BIO *bio=bio_;
  84         static int n;
  85
  86         if(!islower((unsigned char)*name->name))
  87                 return;
  88
  89         BIO_printf(bio,"-%-25s",name->name);
  90         if(++n == 3)
  91                 {
  92                 BIO_printf(bio,"\n");
  93                 n=0;
  94                 }
  95         else
  96                 BIO_printf(bio," ");
  97         }
  98
  99 int MAIN(int, char **);
 100
 101 int MAIN(int argc, char **argv)
 102         {
 103 #ifndef OPENSSL_NO_ENGINE
 104         ENGINE *e = NULL;
 105 #endif
 106         static const char magic[]="Salted__";
 107         char mbuf[sizeof magic-1];
 108         char *strbuf=NULL;
 109         unsigned char *buff=NULL,*bufsize=NULL;
 110         int bsize=BSIZE,verbose=0;
 111         int ret=1,inl;
 112         int nopad = 0;
 113         unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH];
 114         unsigned char salt[PKCS5_SALT_LEN];
 115         char *str=NULL, *passarg = NULL, *pass = NULL;
 116         char *hkey=NULL,*hiv=NULL,*hsalt = NULL;
 117         char *md=NULL;
 118         int enc=1,printkey=0,i,base64=0;
 119         int debug=0,olb64=0,nosalt=0;
 120         const EVP_CIPHER *cipher=NULL,*c;
 121         EVP_CIPHER_CTX *ctx = NULL;
 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  39
 125         char pname[PROG_NAME_SIZE+1];
 126 #ifndef OPENSSL_NO_ENGINE
 127         char *engine = NULL;
 128 #endif
 129         const EVP_MD *dgst=NULL;
 130         int non_fips_allow = 0;
 131
 132         apps_startup();
 133
 134         if (bio_err == NULL)
 135                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 136                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 137
 138         if (!load_config(bio_err, NULL))
 139                 goto end;
 140
 141         /* first check the program name */
 142         program_name(argv[0],pname,sizeof pname);
 143         if (strcmp(pname,"base64") == 0)
 144                 base64=1;
 145
 146         cipher=EVP_get_cipherbyname(pname);
 147         if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
 148                 {
 149                 BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
 150                 goto bad;
 151                 }
 152
 153         argc--;
 154         argv++;
 155         while (argc >= 1)
 156                 {
 157                 if      (strcmp(*argv,"-e") == 0)
 158                         enc=1;
 159                 else if (strcmp(*argv,"-in") == 0)
 160                         {
 161                         if (--argc < 1) goto bad;
 162                         inf= *(++argv);
 163                         }
 164                 else if (strcmp(*argv,"-out") == 0)
 165                         {
 166                         if (--argc < 1) goto bad;
 167                         outf= *(++argv);
 168                         }
 169                 else if (strcmp(*argv,"-pass") == 0)
 170                         {
 171                         if (--argc < 1) goto bad;
 172                         passarg= *(++argv);
 173                         }
 174 #ifndef OPENSSL_NO_ENGINE
 175                 else if (strcmp(*argv,"-engine") == 0)
 176                         {
 177                         if (--argc < 1) goto bad;
 178                         engine= *(++argv);
 179                         }
 180 #endif
 181                 else if (strcmp(*argv,"-d") == 0)
 182                         enc=0;
 183                 else if (strcmp(*argv,"-p") == 0)
 184                         printkey=1;
 185                 else if (strcmp(*argv,"-v") == 0)
 186                         verbose=1;
 187                 else if (strcmp(*argv,"-nopad") == 0)
 188                         nopad=1;
 189                 else if (strcmp(*argv,"-salt") == 0)
 190                         nosalt=0;
 191                 else if (strcmp(*argv,"-nosalt") == 0)
 192                         nosalt=1;
 193                 else if (strcmp(*argv,"-debug") == 0)
 194                         debug=1;
 195                 else if (strcmp(*argv,"-P") == 0)
 196                         printkey=2;
 197                 else if (strcmp(*argv,"-A") == 0)
 198                         olb64=1;
 199                 else if (strcmp(*argv,"-a") == 0)
 200                         base64=1;
 201                 else if (strcmp(*argv,"-base64") == 0)
 202                         base64=1;
 203                 else if (strcmp(*argv,"-bufsize") == 0)
 204                         {
 205                         if (--argc < 1) goto bad;
 206                         bufsize=(unsigned char *)*(++argv);
 207                         }
 208                 else if (strcmp(*argv,"-k") == 0)
 209                         {
 210                         if (--argc < 1) goto bad;
 211                         str= *(++argv);
 212                         }
 213                 else if (strcmp(*argv,"-kfile") == 0)
 214                         {
 215                         static char buf[128];
 216                         FILE *infile;
 217                         char *file;
 218
 219                         if (--argc < 1) goto bad;
 220                         file= *(++argv);
 221                         infile=fopen(file,"r");
 222                         if (infile == NULL)
 223                                 {
 224                                 BIO_printf(bio_err,"unable to read key from '%s'\n",
 225                                         file);
 226                                 goto bad;
 227                                 }
 228                         buf[0]='\0';
 229                         fgets(buf,sizeof buf,infile);
 230                         fclose(infile);
 231                         i=strlen(buf);
 232                         if ((i > 0) &&
 233                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 234                                 buf[--i]='\0';
 235                         if ((i > 0) &&
 236                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 237                                 buf[--i]='\0';
 238                         if (i < 1)
 239                                 {
 240                                 BIO_printf(bio_err,"zero length password\n");
 241                                 goto bad;
 242                                 }
 243                         str=buf;
 244                         }
 245                 else if (strcmp(*argv,"-K") == 0)
 246                         {
 247                         if (--argc < 1) goto bad;
 248                         hkey= *(++argv);
 249                         }
 250                 else if (strcmp(*argv,"-S") == 0)
 251                         {
 252                         if (--argc < 1) goto bad;
 253                         hsalt= *(++argv);
 254                         }
 255                 else if (strcmp(*argv,"-iv") == 0)
 256                         {
 257                         if (--argc < 1) goto bad;
 258                         hiv= *(++argv);
 259                         }
 260                 else if (strcmp(*argv,"-md") == 0)
 261                         {
 262                         if (--argc < 1) goto bad;
 263                         md= *(++argv);
 264                         }
 265                 else if (strcmp(*argv,"-non-fips-allow") == 0)
 266                         non_fips_allow = 1;
 267                 else if ((argv[0][0] == '-') &&
 268                         ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
 269                         {
 270                         cipher=c;
 271                         }
 272                 else if (strcmp(*argv,"-none") == 0)
 273                         cipher=NULL;
 274                 else
 275                         {
 276                         BIO_printf(bio_err,"unknown option '%s'\n",*argv);
 277 bad:
 278                         BIO_printf(bio_err,"options are\n");
 279                         BIO_printf(bio_err,"%-14s input file\n","-in <file>");
 280                         BIO_printf(bio_err,"%-14s output file\n","-out <file>");
 281                         BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>");
 282                         BIO_printf(bio_err,"%-14s encrypt\n","-e");
 283                         BIO_printf(bio_err,"%-14s decrypt\n","-d");
 284                         BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
 285                         BIO_printf(bio_err,"%-14s passphrase is the next argument\n","-k");
 286                         BIO_printf(bio_err,"%-14s passphrase is the first line of the file argument\n","-kfile");
 287                         BIO_printf(bio_err,"%-14s the next argument is the md to use to create a key\n","-md");
 288                         BIO_printf(bio_err,"%-14s   from a passphrase.  One of md2, md5, sha or sha1\n","");
 289                         BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
 290                         BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
 291                         BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
 292 #ifndef OPENSSL_NO_ENGINE
 293                         BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e");
 294 #endif
 295
 296                         BIO_printf(bio_err,"Cipher Types\n");
 297                         OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
 298                                                show_ciphers,
 299                                                bio_err);
 300                         BIO_printf(bio_err,"\n");
 301
 302                         goto end;
 303                         }
 304                 argc--;
 305                 argv++;
 306                 }
 307
 308 #ifndef OPENSSL_NO_ENGINE
 309         e = setup_engine(bio_err, engine, 0);
 310 #endif
 311
 312         if (md && (dgst=EVP_get_digestbyname(md)) == NULL)
 313                 {
 314                 BIO_printf(bio_err,"%s is an unsupported message digest type\n",md);
 315                 goto end;
 316                 }
 317
 318         if (dgst == NULL)
 319                 {
 320                 if (in_FIPS_mode)
 321                         dgst = EVP_sha1();
 322                 else
 323                         dgst = EVP_md5();
 324                 }
 325
 326         if (bufsize != NULL)
 327                 {
 328                 unsigned long n;
 329
 330                 for (n=0; *bufsize; bufsize++)
 331                         {
 332                         i= *bufsize;
 333                         if ((i <= '9') && (i >= '0'))
 334                                 n=n*10+i-'0';
 335                         else if (i == 'k')
 336                                 {
 337                                 n*=1024;
 338                                 bufsize++;
 339                                 break;
 340                                 }
 341                         }
 342                 if (*bufsize != '\0')
 343                         {
 344                         BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
 345                         goto end;
 346                         }
 347
 348                 /* It must be large enough for a base64 encoded line */
 349                 if (base64 && n < 80) n=80;
 350
 351                 bsize=(int)n;
 352                 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
 353                 }
 354
 355         strbuf=OPENSSL_malloc(SIZE);
 356         buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize));
 357         if ((buff == NULL) || (strbuf == NULL))
 358                 {
 359                 BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
 360                 goto end;
 361                 }
 362
 363         in=BIO_new(BIO_s_file());
 364         out=BIO_new(BIO_s_file());
 365         if ((in == NULL) || (out == NULL))
 366                 {
 367                 ERR_print_errors(bio_err);
 368                 goto end;
 369                 }
 370         if (debug)
 371                 {
 372                 BIO_set_callback(in,BIO_debug_callback);
 373                 BIO_set_callback(out,BIO_debug_callback);
 374                 BIO_set_callback_arg(in,(char *)bio_err);
 375                 BIO_set_callback_arg(out,(char *)bio_err);
 376                 }
 377
 378         if (inf == NULL)
 379                 {
 380                 if (bufsize != NULL)
 381                         setvbuf(stdin, (char *)NULL, _IONBF, 0);
 382                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 383                 }
 384         else
 385                 {
 386                 if (BIO_read_filename(in,inf) <= 0)
 387                         {
 388                         perror(inf);
 389                         goto end;
 390                         }
 391                 }
 392
 393         if(!str && passarg) {
 394                 if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
 395                         BIO_printf(bio_err, "Error getting password\n");
 396                         goto end;
 397                 }
 398                 str = pass;
 399         }
 400
 401         if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
 402                 {
 403                 for (;;)
 404                         {
 405                         char buf[200];
 406
 407                         BIO_snprintf(buf,sizeof buf,"enter %s %s password:",
 408                                      OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
 409                                      (enc)?"encryption":"decryption");
 410                         strbuf[0]='\0';
 411                         i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
 412                         if (i == 0)
 413                                 {
 414                                 if (strbuf[0] == '\0')
 415                                         {
 416                                         ret=1;
 417                                         goto end;
 418                                         }
 419                                 str=strbuf;
 420                                 break;
 421                                 }
 422                         if (i < 0)
 423                                 {
 424                                 BIO_printf(bio_err,"bad password read\n");
 425                                 goto end;
 426                                 }
 427                         }
 428                 }
 429
 430
 431         if (outf == NULL)
 432                 {
 433                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 434                 if (bufsize != NULL)
 435                         setvbuf(stdout, (char *)NULL, _IONBF, 0);
 436 #ifdef OPENSSL_SYS_VMS
 437                 {
 438                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 439                 out = BIO_push(tmpbio, out);
 440                 }
 441 #endif
 442                 }
 443         else
 444                 {
 445                 if (BIO_write_filename(out,outf) <= 0)
 446                         {
 447                         perror(outf);
 448                         goto end;
 449                         }
 450                 }
 451
 452         rbio=in;
 453         wbio=out;
 454
 455         if (base64)
 456                 {
 457                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
 458                         goto end;
 459                 if (debug)
 460                         {
 461                         BIO_set_callback(b64,BIO_debug_callback);
 462                         BIO_set_callback_arg(b64,(char *)bio_err);
 463                         }
 464                 if (olb64)
 465                         BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
 466                 if (enc)
 467                         wbio=BIO_push(b64,wbio);
 468                 else
 469                         rbio=BIO_push(b64,rbio);
 470                 }
 471
 472         if (cipher != NULL)
 473                 {
 474                 /* Note that str is NULL if a key was passed on the command
 475                  * line, so we get no salt in that case. Is this a bug?
 476                  */
 477                 if (str != NULL)
 478                         {
 479                         /* Salt handling: if encrypting generate a salt and
 480                          * write to output BIO. If decrypting read salt from
 481                          * input BIO.
 482                          */
 483                         unsigned char *sptr;
 484                         if(nosalt) sptr = NULL;
 485                         else {
 486                                 if(enc) {
 487                                         if(hsalt) {
 488                                                 if(!set_hex(hsalt,salt,sizeof salt)) {
 489                                                         BIO_printf(bio_err,
 490                                                                 "invalid hex salt value\n");
 491                                                         goto end;
 492                                                 }
 493                                         } else if (RAND_pseudo_bytes(salt, sizeof salt) < 0)
 494                                                 goto end;
 495                                         /* If -P option then don't bother writing */
 496                                         if((printkey != 2)
 497                                            && (BIO_write(wbio,magic,
 498                                                          sizeof magic-1) != sizeof magic-1
 499                                                || BIO_write(wbio,
 500                                                             (char *)salt,
 501                                                             sizeof salt) != sizeof salt)) {
 502                                                 BIO_printf(bio_err,"error writing output file\n");
 503                                                 goto end;
 504                                         }
 505                                 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
 506                                           || BIO_read(rbio,
 507                                                       (unsigned char *)salt,
 508                                     sizeof salt) != sizeof salt) {
 509                                         BIO_printf(bio_err,"error reading input file\n");
 510                                         goto end;
 511                                 } else if(memcmp(mbuf,magic,sizeof magic-1)) {
 512                                     BIO_printf(bio_err,"bad magic number\n");
 513                                     goto end;
 514                                 }
 515
 516                                 sptr = salt;
 517                         }
 518
 519                         EVP_BytesToKey(cipher,dgst,sptr,
 520                                 (unsigned char *)str,
 521                                 strlen(str),1,key,iv);
 522                         /* zero the complete buffer or the string
 523                          * passed from the command line
 524                          * bug picked up by
 525                          * Larry J. Hughes Jr. <hughes@indiana.edu> */
 526                         if (str == strbuf)
 527                                 OPENSSL_cleanse(str,SIZE);
 528                         else
 529                                 OPENSSL_cleanse(str,strlen(str));
 530                         }
 531                 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv))
 532                         {
 533                         BIO_printf(bio_err,"invalid hex iv value\n");
 534                         goto end;
 535                         }
 536                 if ((hiv == NULL) && (str == NULL)
 537                     && EVP_CIPHER_iv_length(cipher) != 0)
 538                         {
 539                         /* No IV was explicitly set and no IV was generated
 540                          * during EVP_BytesToKey. Hence the IV is undefined,
 541                          * making correct decryption impossible. */
 542                         BIO_printf(bio_err, "iv undefined\n");
 543                         goto end;
 544                         }
 545                 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key))
 546                         {
 547                         BIO_printf(bio_err,"invalid hex key value\n");
 548                         goto end;
 549                         }
 550
 551                 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
 552                         goto end;
 553
 554                 /* Since we may be changing parameters work on the encryption
 555                  * context rather than calling BIO_set_cipher().
 556                  */
 557
 558                 BIO_get_cipher_ctx(benc, &ctx);
 559
 560                 if (non_fips_allow)
 561                         EVP_CIPHER_CTX_set_flags(ctx,
 562                                 EVP_CIPH_FLAG_NON_FIPS_ALLOW);
 563
 564                 if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc))
 565                         {
 566                         BIO_printf(bio_err, "Error setting cipher %s\n",
 567                                 EVP_CIPHER_name(cipher));
 568                         ERR_print_errors(bio_err);
 569                         goto end;
 570                         }
 571
 572                 if (nopad)
 573                         EVP_CIPHER_CTX_set_padding(ctx, 0);
 574
 575                 if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc))
 576                         {
 577                         BIO_printf(bio_err, "Error setting cipher %s\n",
 578                                 EVP_CIPHER_name(cipher));
 579                         ERR_print_errors(bio_err);
 580                         goto end;
 581                         }
 582
 583                 if (debug)
 584                         {
 585                         BIO_set_callback(benc,BIO_debug_callback);
 586                         BIO_set_callback_arg(benc,(char *)bio_err);
 587                         }
 588
 589                 if (printkey)
 590                         {
 591                         if (!nosalt)
 592                                 {
 593                                 printf("salt=");
 594                                 for (i=0; i<(int)sizeof(salt); i++)
 595                                         printf("%02X",salt[i]);
 596                                 printf("\n");
 597                                 }
 598                         if (cipher->key_len > 0)
 599                                 {
 600                                 printf("key=");
 601                                 for (i=0; i<cipher->key_len; i++)
 602                                         printf("%02X",key[i]);
 603                                 printf("\n");
 604                                 }
 605                         if (cipher->iv_len > 0)
 606                                 {
 607                                 printf("iv =");
 608                                 for (i=0; i<cipher->iv_len; i++)
 609                                         printf("%02X",iv[i]);
 610                                 printf("\n");
 611                                 }
 612                         if (printkey == 2)
 613                                 {
 614                                 ret=0;
 615                                 goto end;
 616                                 }
 617                         }
 618                 }
 619
 620         /* Only encrypt/decrypt as we write the file */
 621         if (benc != NULL)
 622                 wbio=BIO_push(benc,wbio);
 623
 624         for (;;)
 625                 {
 626                 inl=BIO_read(rbio,(char *)buff,bsize);
 627                 if (inl <= 0) break;
 628                 if (BIO_write(wbio,(char *)buff,inl) != inl)
 629                         {
 630                         BIO_printf(bio_err,"error writing output file\n");
 631                         goto end;
 632                         }
 633                 }
 634         if (!BIO_flush(wbio))
 635                 {
 636                 BIO_printf(bio_err,"bad decrypt\n");
 637                 goto end;
 638                 }
 639
 640         ret=0;
 641         if (verbose)
 642                 {
 643                 BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
 644                 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
 645                 }
 646 end:
 647         ERR_print_errors(bio_err);
 648         if (strbuf != NULL) OPENSSL_free(strbuf);
 649         if (buff != NULL) OPENSSL_free(buff);
 650         if (in != NULL) BIO_free(in);
 651         if (out != NULL) BIO_free_all(out);
 652         if (benc != NULL) BIO_free(benc);
 653         if (b64 != NULL) BIO_free(b64);
 654         if(pass) OPENSSL_free(pass);
 655         apps_shutdown();
 656         OPENSSL_EXIT(ret);
 657         }
 658
 659 int set_hex(char *in, unsigned char *out, int size)
 660         {
 661         int i,n;
 662         unsigned char j;
 663
 664         n=strlen(in);
 665         if (n > (size*2))
 666                 {
 667                 BIO_printf(bio_err,"hex string is too long\n");
 668                 return(0);
 669                 }
 670         memset(out,0,size);
 671         for (i=0; i<n; i++)
 672                 {
 673                 j=(unsigned char)*in;
 674                 *(in++)='\0';
 675                 if (j == 0) break;
 676                 if ((j >= '0') && (j <= '9'))
 677                         j-='0';
 678                 else if ((j >= 'A') && (j <= 'F'))
 679                         j=j-'A'+10;
 680                 else if ((j >= 'a') && (j <= 'f'))
 681                         j=j-'a'+10;
 682                 else
 683                         {
 684                         BIO_printf(bio_err,"non-hex digit\n");
 685                         return(0);
 686                         }
 687                 if (i&1)
 688                         out[i/2]|=j;
 689                 else
 690                         out[i/2]=(j<<4);
 691                 }
 692         return(1);
 693         }