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 #ifndef OPENSSL_NO_COMP
  71 #include <openssl/comp.h>
  72 #endif
  73 #include <ctype.h>
  74
  75 int set_hex(char *in,unsigned char *out,int size);
  76 #undef SIZE
  77 #undef BSIZE
  78 #undef PROG
  79
  80 #define SIZE    (512)
  81 #define BSIZE   (8*1024)
  82 #define PROG    enc_main
  83
  84 static void show_ciphers(const OBJ_NAME *name,void *bio_)
  85         {
  86         BIO *bio=bio_;
  87         static int n;
  88
  89         if(!islower((unsigned char)*name->name))
  90                 return;
  91
  92         BIO_printf(bio,"-%-25s",name->name);
  93         if(++n == 3)
  94                 {
  95                 BIO_printf(bio,"\n");
  96                 n=0;
  97                 }
  98         else
  99                 BIO_printf(bio," ");
 100         }
 101
 102 int MAIN(int, char **);
 103
 104 int MAIN(int argc, char **argv)
 105         {
 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 #ifdef ZLIB
 120         int do_zlib=0;
 121         BIO *bzl = NULL;
 122 #endif
 123         int debug=0,olb64=0,nosalt=0;
 124         const EVP_CIPHER *cipher=NULL,*c;
 125         EVP_CIPHER_CTX *ctx = NULL;
 126         char *inf=NULL,*outf=NULL;
 127         BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
 128 #define PROG_NAME_SIZE  39
 129         char pname[PROG_NAME_SIZE+1];
 130 #ifndef OPENSSL_NO_ENGINE
 131         char *engine = NULL;
 132 #endif
 133         const EVP_MD *dgst=NULL;
 134         int non_fips_allow = 0;
 135
 136         apps_startup();
 137
 138         if (bio_err == NULL)
 139                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 140                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 141
 142         if (!load_config(bio_err, NULL))
 143                 goto end;
 144
 145         /* first check the program name */
 146         program_name(argv[0],pname,sizeof pname);
 147         if (strcmp(pname,"base64") == 0)
 148                 base64=1;
 149 #ifdef ZLIB
 150         if (strcmp(pname,"zlib") == 0)
 151                 do_zlib=1;
 152 #endif
 153
 154         cipher=EVP_get_cipherbyname(pname);
 155 #ifdef ZLIB
 156         if (!do_zlib && !base64 && (cipher == NULL)
 157                                 && (strcmp(pname,"enc") != 0))
 158 #else
 159         if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
 160 #endif
 161                 {
 162                 BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
 163                 goto bad;
 164                 }
 165
 166         argc--;
 167         argv++;
 168         while (argc >= 1)
 169                 {
 170                 if      (strcmp(*argv,"-e") == 0)
 171                         enc=1;
 172                 else if (strcmp(*argv,"-in") == 0)
 173                         {
 174                         if (--argc < 1) goto bad;
 175                         inf= *(++argv);
 176                         }
 177                 else if (strcmp(*argv,"-out") == 0)
 178                         {
 179                         if (--argc < 1) goto bad;
 180                         outf= *(++argv);
 181                         }
 182                 else if (strcmp(*argv,"-pass") == 0)
 183                         {
 184                         if (--argc < 1) goto bad;
 185                         passarg= *(++argv);
 186                         }
 187 #ifndef OPENSSL_NO_ENGINE
 188                 else if (strcmp(*argv,"-engine") == 0)
 189                         {
 190                         if (--argc < 1) goto bad;
 191                         engine= *(++argv);
 192                         }
 193 #endif
 194                 else if (strcmp(*argv,"-d") == 0)
 195                         enc=0;
 196                 else if (strcmp(*argv,"-p") == 0)
 197                         printkey=1;
 198                 else if (strcmp(*argv,"-v") == 0)
 199                         verbose=1;
 200                 else if (strcmp(*argv,"-nopad") == 0)
 201                         nopad=1;
 202                 else if (strcmp(*argv,"-salt") == 0)
 203                         nosalt=0;
 204                 else if (strcmp(*argv,"-nosalt") == 0)
 205                         nosalt=1;
 206                 else if (strcmp(*argv,"-debug") == 0)
 207                         debug=1;
 208                 else if (strcmp(*argv,"-P") == 0)
 209                         printkey=2;
 210                 else if (strcmp(*argv,"-A") == 0)
 211                         olb64=1;
 212                 else if (strcmp(*argv,"-a") == 0)
 213                         base64=1;
 214                 else if (strcmp(*argv,"-base64") == 0)
 215                         base64=1;
 216 #ifdef ZLIB
 217                 else if (strcmp(*argv,"-z") == 0)
 218                         do_zlib=1;
 219 #endif
 220                 else if (strcmp(*argv,"-bufsize") == 0)
 221                         {
 222                         if (--argc < 1) goto bad;
 223                         bufsize=(unsigned char *)*(++argv);
 224                         }
 225                 else if (strcmp(*argv,"-k") == 0)
 226                         {
 227                         if (--argc < 1) goto bad;
 228                         str= *(++argv);
 229                         }
 230                 else if (strcmp(*argv,"-kfile") == 0)
 231                         {
 232                         static char buf[128];
 233                         FILE *infile;
 234                         char *file;
 235
 236                         if (--argc < 1) goto bad;
 237                         file= *(++argv);
 238                         infile=fopen(file,"r");
 239                         if (infile == NULL)
 240                                 {
 241                                 BIO_printf(bio_err,"unable to read key from '%s'\n",
 242                                         file);
 243                                 goto bad;
 244                                 }
 245                         buf[0]='\0';
 246                         if (!fgets(buf,sizeof buf,infile))
 247                                 {
 248                                 BIO_printf(bio_err,"unable to read key from '%s'\n",
 249                                         file);
 250                                 goto bad;
 251                                 }
 252                         fclose(infile);
 253                         i=strlen(buf);
 254                         if ((i > 0) &&
 255                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 256                                 buf[--i]='\0';
 257                         if ((i > 0) &&
 258                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 259                                 buf[--i]='\0';
 260                         if (i < 1)
 261                                 {
 262                                 BIO_printf(bio_err,"zero length password\n");
 263                                 goto bad;
 264                                 }
 265                         str=buf;
 266                         }
 267                 else if (strcmp(*argv,"-K") == 0)
 268                         {
 269                         if (--argc < 1) goto bad;
 270                         hkey= *(++argv);
 271                         }
 272                 else if (strcmp(*argv,"-S") == 0)
 273                         {
 274                         if (--argc < 1) goto bad;
 275                         hsalt= *(++argv);
 276                         }
 277                 else if (strcmp(*argv,"-iv") == 0)
 278                         {
 279                         if (--argc < 1) goto bad;
 280                         hiv= *(++argv);
 281                         }
 282                 else if (strcmp(*argv,"-md") == 0)
 283                         {
 284                         if (--argc < 1) goto bad;
 285                         md= *(++argv);
 286                         }
 287                 else if (strcmp(*argv,"-non-fips-allow") == 0)
 288                         non_fips_allow = 1;
 289                 else if ((argv[0][0] == '-') &&
 290                         ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
 291                         {
 292                         cipher=c;
 293                         }
 294                 else if (strcmp(*argv,"-none") == 0)
 295                         cipher=NULL;
 296                 else
 297                         {
 298                         BIO_printf(bio_err,"unknown option '%s'\n",*argv);
 299 bad:
 300                         BIO_printf(bio_err,"options are\n");
 301                         BIO_printf(bio_err,"%-14s input file\n","-in <file>");
 302                         BIO_printf(bio_err,"%-14s output file\n","-out <file>");
 303                         BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>");
 304                         BIO_printf(bio_err,"%-14s encrypt\n","-e");
 305                         BIO_printf(bio_err,"%-14s decrypt\n","-d");
 306                         BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
 307                         BIO_printf(bio_err,"%-14s passphrase is the next argument\n","-k");
 308                         BIO_printf(bio_err,"%-14s passphrase is the first line of the file argument\n","-kfile");
 309                         BIO_printf(bio_err,"%-14s the next argument is the md to use to create a key\n","-md");
 310                         BIO_printf(bio_err,"%-14s   from a passphrase.  One of md2, md5, sha or sha1\n","");
 311                         BIO_printf(bio_err,"%-14s salt in hex is the next argument\n","-S");
 312                         BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
 313                         BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
 314                         BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
 315                         BIO_printf(bio_err,"%-14s disable standard block padding\n","-nopad");
 316 #ifndef OPENSSL_NO_ENGINE
 317                         BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e");
 318 #endif
 319
 320                         BIO_printf(bio_err,"Cipher Types\n");
 321                         OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
 322                                                show_ciphers,
 323                                                bio_err);
 324                         BIO_printf(bio_err,"\n");
 325
 326                         goto end;
 327                         }
 328                 argc--;
 329                 argv++;
 330                 }
 331
 332 #ifndef OPENSSL_NO_ENGINE
 333         setup_engine(bio_err, engine, 0);
 334 #endif
 335
 336         if (cipher && EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER)
 337                 {
 338                 BIO_printf(bio_err, "AEAD ciphers not supported by the enc utility\n");
 339                 goto end;
 340                 }
 341
 342         if (cipher && (EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE))
 343                 {
 344                 BIO_printf(bio_err, "Ciphers in XTS mode are not supported by the enc utility\n");
 345                 goto end;
 346                 }
 347
 348         if (md && (dgst=EVP_get_digestbyname(md)) == NULL)
 349                 {
 350                 BIO_printf(bio_err,"%s is an unsupported message digest type\n",md);
 351                 goto end;
 352                 }
 353
 354         if (dgst == NULL)
 355                 {
 356                 dgst = EVP_md5();
 357                 }
 358
 359         if (bufsize != NULL)
 360                 {
 361                 unsigned long n;
 362
 363                 for (n=0; *bufsize; bufsize++)
 364                         {
 365                         i= *bufsize;
 366                         if ((i <= '9') && (i >= '0'))
 367                                 n=n*10+i-'0';
 368                         else if (i == 'k')
 369                                 {
 370                                 n*=1024;
 371                                 bufsize++;
 372                                 break;
 373                                 }
 374                         }
 375                 if (*bufsize != '\0')
 376                         {
 377                         BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
 378                         goto end;
 379                         }
 380
 381                 /* It must be large enough for a base64 encoded line */
 382                 if (base64 && n < 80) n=80;
 383
 384                 bsize=(int)n;
 385                 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
 386                 }
 387
 388         strbuf=OPENSSL_malloc(SIZE);
 389         buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize));
 390         if ((buff == NULL) || (strbuf == NULL))
 391                 {
 392                 BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
 393                 goto end;
 394                 }
 395
 396         in=BIO_new(BIO_s_file());
 397         out=BIO_new(BIO_s_file());
 398         if ((in == NULL) || (out == NULL))
 399                 {
 400                 ERR_print_errors(bio_err);
 401                 goto end;
 402                 }
 403         if (debug)
 404                 {
 405                 BIO_set_callback(in,BIO_debug_callback);
 406                 BIO_set_callback(out,BIO_debug_callback);
 407                 BIO_set_callback_arg(in,(char *)bio_err);
 408                 BIO_set_callback_arg(out,(char *)bio_err);
 409                 }
 410
 411         if (inf == NULL)
 412                 {
 413 #ifndef OPENSSL_NO_SETVBUF_IONBF
 414                 if (bufsize != NULL)
 415                         setvbuf(stdin, (char *)NULL, _IONBF, 0);
 416 #endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
 417                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 418                 }
 419         else
 420                 {
 421                 if (BIO_read_filename(in,inf) <= 0)
 422                         {
 423                         perror(inf);
 424                         goto end;
 425                         }
 426                 }
 427
 428         if(!str && passarg) {
 429                 if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
 430                         BIO_printf(bio_err, "Error getting password\n");
 431                         goto end;
 432                 }
 433                 str = pass;
 434         }
 435
 436         if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
 437                 {
 438                 for (;;)
 439                         {
 440                         char buf[200];
 441
 442                         BIO_snprintf(buf,sizeof buf,"enter %s %s password:",
 443                                      OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
 444                                      (enc)?"encryption":"decryption");
 445                         strbuf[0]='\0';
 446                         i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
 447                         if (i == 0)
 448                                 {
 449                                 if (strbuf[0] == '\0')
 450                                         {
 451                                         ret=1;
 452                                         goto end;
 453                                         }
 454                                 str=strbuf;
 455                                 break;
 456                                 }
 457                         if (i < 0)
 458                                 {
 459                                 BIO_printf(bio_err,"bad password read\n");
 460                                 goto end;
 461                                 }
 462                         }
 463                 }
 464
 465
 466         if (outf == NULL)
 467                 {
 468                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 469 #ifndef OPENSSL_NO_SETVBUF_IONBF
 470                 if (bufsize != NULL)
 471                         setvbuf(stdout, (char *)NULL, _IONBF, 0);
 472 #endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
 473 #ifdef OPENSSL_SYS_VMS
 474                 {
 475                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 476                 out = BIO_push(tmpbio, out);
 477                 }
 478 #endif
 479                 }
 480         else
 481                 {
 482                 if (BIO_write_filename(out,outf) <= 0)
 483                         {
 484                         perror(outf);
 485                         goto end;
 486                         }
 487                 }
 488
 489         rbio=in;
 490         wbio=out;
 491
 492 #ifdef ZLIB
 493
 494         if (do_zlib)
 495                 {
 496                 if ((bzl=BIO_new(BIO_f_zlib())) == NULL)
 497                         goto end;
 498                 if (enc)
 499                         wbio=BIO_push(bzl,wbio);
 500                 else
 501                         rbio=BIO_push(bzl,rbio);
 502                 }
 503 #endif
 504
 505         if (base64)
 506                 {
 507                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
 508                         goto end;
 509                 if (debug)
 510                         {
 511                         BIO_set_callback(b64,BIO_debug_callback);
 512                         BIO_set_callback_arg(b64,(char *)bio_err);
 513                         }
 514                 if (olb64)
 515                         BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
 516                 if (enc)
 517                         wbio=BIO_push(b64,wbio);
 518                 else
 519                         rbio=BIO_push(b64,rbio);
 520                 }
 521
 522         if (cipher != NULL)
 523                 {
 524                 /* Note that str is NULL if a key was passed on the command
 525                  * line, so we get no salt in that case. Is this a bug?
 526                  */
 527                 if (str != NULL)
 528                         {
 529                         /* Salt handling: if encrypting generate a salt and
 530                          * write to output BIO. If decrypting read salt from
 531                          * input BIO.
 532                          */
 533                         unsigned char *sptr;
 534                         if(nosalt) sptr = NULL;
 535                         else {
 536                                 if(enc) {
 537                                         if(hsalt) {
 538                                                 if(!set_hex(hsalt,salt,sizeof salt)) {
 539                                                         BIO_printf(bio_err,
 540                                                                 "invalid hex salt value\n");
 541                                                         goto end;
 542                                                 }
 543                                         } else if (RAND_pseudo_bytes(salt, sizeof salt) < 0)
 544                                                 goto end;
 545                                         /* If -P option then don't bother writing */
 546                                         if((printkey != 2)
 547                                            && (BIO_write(wbio,magic,
 548                                                          sizeof magic-1) != sizeof magic-1
 549                                                || BIO_write(wbio,
 550                                                             (char *)salt,
 551                                                             sizeof salt) != sizeof salt)) {
 552                                                 BIO_printf(bio_err,"error writing output file\n");
 553                                                 goto end;
 554                                         }
 555                                 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
 556                                           || BIO_read(rbio,
 557                                                       (unsigned char *)salt,
 558                                     sizeof salt) != sizeof salt) {
 559                                         BIO_printf(bio_err,"error reading input file\n");
 560                                         goto end;
 561                                 } else if(memcmp(mbuf,magic,sizeof magic-1)) {
 562                                     BIO_printf(bio_err,"bad magic number\n");
 563                                     goto end;
 564                                 }
 565
 566                                 sptr = salt;
 567                         }
 568
 569                         if (!EVP_BytesToKey(cipher,dgst,sptr,
 570                                             (unsigned char *)str,
 571                                             strlen(str),1,key,iv))
 572                                 {
 573                                 BIO_printf(bio_err, "EVP_BytesToKey failed\n");
 574                                 goto end;
 575                                 }
 576                         /* zero the complete buffer or the string
 577                          * passed from the command line
 578                          * bug picked up by
 579                          * Larry J. Hughes Jr. <hughes@indiana.edu> */
 580                         if (str == strbuf)
 581                                 OPENSSL_cleanse(str,SIZE);
 582                         else
 583                                 OPENSSL_cleanse(str,strlen(str));
 584                         }
 585                 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv))
 586                         {
 587                         BIO_printf(bio_err,"invalid hex iv value\n");
 588                         goto end;
 589                         }
 590                 if ((hiv == NULL) && (str == NULL)
 591                     && EVP_CIPHER_iv_length(cipher) != 0)
 592                         {
 593                         /* No IV was explicitly set and no IV was generated
 594                          * during EVP_BytesToKey. Hence the IV is undefined,
 595                          * making correct decryption impossible. */
 596                         BIO_printf(bio_err, "iv undefined\n");
 597                         goto end;
 598                         }
 599                 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key))
 600                         {
 601                         BIO_printf(bio_err,"invalid hex key value\n");
 602                         goto end;
 603                         }
 604
 605                 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
 606                         goto end;
 607
 608                 /* Since we may be changing parameters work on the encryption
 609                  * context rather than calling BIO_set_cipher().
 610                  */
 611
 612                 BIO_get_cipher_ctx(benc, &ctx);
 613
 614                 if (non_fips_allow)
 615                         EVP_CIPHER_CTX_set_flags(ctx,
 616                                 EVP_CIPH_FLAG_NON_FIPS_ALLOW);
 617
 618                 if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc))
 619                         {
 620                         BIO_printf(bio_err, "Error setting cipher %s\n",
 621                                 EVP_CIPHER_name(cipher));
 622                         ERR_print_errors(bio_err);
 623                         goto end;
 624                         }
 625
 626                 if (nopad)
 627                         EVP_CIPHER_CTX_set_padding(ctx, 0);
 628
 629                 if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc))
 630                         {
 631                         BIO_printf(bio_err, "Error setting cipher %s\n",
 632                                 EVP_CIPHER_name(cipher));
 633                         ERR_print_errors(bio_err);
 634                         goto end;
 635                         }
 636
 637                 if (debug)
 638                         {
 639                         BIO_set_callback(benc,BIO_debug_callback);
 640                         BIO_set_callback_arg(benc,(char *)bio_err);
 641                         }
 642
 643                 if (printkey)
 644                         {
 645                         if (!nosalt)
 646                                 {
 647                                 printf("salt=");
 648                                 for (i=0; i<(int)sizeof(salt); i++)
 649                                         printf("%02X",salt[i]);
 650                                 printf("\n");
 651                                 }
 652                         if (cipher->key_len > 0)
 653                                 {
 654                                 printf("key=");
 655                                 for (i=0; i<cipher->key_len; i++)
 656                                         printf("%02X",key[i]);
 657                                 printf("\n");
 658                                 }
 659                         if (cipher->iv_len > 0)
 660                                 {
 661                                 printf("iv =");
 662                                 for (i=0; i<cipher->iv_len; i++)
 663                                         printf("%02X",iv[i]);
 664                                 printf("\n");
 665                                 }
 666                         if (printkey == 2)
 667                                 {
 668                                 ret=0;
 669                                 goto end;
 670                                 }
 671                         }
 672                 }
 673
 674         /* Only encrypt/decrypt as we write the file */
 675         if (benc != NULL)
 676                 wbio=BIO_push(benc,wbio);
 677
 678         for (;;)
 679                 {
 680                 inl=BIO_read(rbio,(char *)buff,bsize);
 681                 if (inl <= 0) break;
 682                 if (BIO_write(wbio,(char *)buff,inl) != inl)
 683                         {
 684                         BIO_printf(bio_err,"error writing output file\n");
 685                         goto end;
 686                         }
 687                 }
 688         if (!BIO_flush(wbio))
 689                 {
 690                 BIO_printf(bio_err,"bad decrypt\n");
 691                 goto end;
 692                 }
 693
 694         ret=0;
 695         if (verbose)
 696                 {
 697                 BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
 698                 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
 699                 }
 700 end:
 701         ERR_print_errors(bio_err);
 702         if (strbuf != NULL) OPENSSL_free(strbuf);
 703         if (buff != NULL) OPENSSL_free(buff);
 704         if (in != NULL) BIO_free(in);
 705         if (out != NULL) BIO_free_all(out);
 706         if (benc != NULL) BIO_free(benc);
 707         if (b64 != NULL) BIO_free(b64);
 708 #ifdef ZLIB
 709         if (bzl != NULL) BIO_free(bzl);
 710 #endif
 711         if(pass) OPENSSL_free(pass);
 712         apps_shutdown();
 713         OPENSSL_EXIT(ret);
 714         }
 715
 716 int set_hex(char *in, unsigned char *out, int size)
 717         {
 718         int i,n;
 719         unsigned char j;
 720
 721         n=strlen(in);
 722         if (n > (size*2))
 723                 {
 724                 BIO_printf(bio_err,"hex string is too long\n");
 725                 return(0);
 726                 }
 727         memset(out,0,size);
 728         for (i=0; i<n; i++)
 729                 {
 730                 j=(unsigned char)*in;
 731                 *(in++)='\0';
 732                 if (j == 0) break;
 733                 if ((j >= '0') && (j <= '9'))
 734                         j-='0';
 735                 else if ((j >= 'A') && (j <= 'F'))
 736                         j=j-'A'+10;
 737                 else if ((j >= 'a') && (j <= 'f'))
 738                         j=j-'a'+10;
 739                 else
 740                         {
 741                         BIO_printf(bio_err,"non-hex digit\n");
 742                         return(0);
 743                         }
 744                 if (i&1)
 745                         out[i/2]|=j;
 746                 else
 747                         out[i/2]=(j<<4);
 748                 }
 749         return(1);
 750         }