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