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         ENGINE *e = NULL;
 104         static const char magic[]="Salted__";
 105         char mbuf[sizeof magic-1];
 106         char *strbuf=NULL;
 107         unsigned char *buff=NULL,*bufsize=NULL;
 108         int bsize=BSIZE,verbose=0;
 109         int ret=1,inl;
 110         int nopad = 0;
 111         unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH];
 112         unsigned char salt[PKCS5_SALT_LEN];
 113         char *str=NULL, *passarg = NULL, *pass = NULL;
 114         char *hkey=NULL,*hiv=NULL,*hsalt = NULL;
 115         int enc=1,printkey=0,i,base64=0;
 116         int debug=0,olb64=0,nosalt=0;
 117         const EVP_CIPHER *cipher=NULL,*c;
 118         char *inf=NULL,*outf=NULL;
 119         BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
 120 #define PROG_NAME_SIZE  39
 121         char pname[PROG_NAME_SIZE+1];
 122         char *engine = NULL;
 123
 124         apps_startup();
 125
 126         if (bio_err == NULL)
 127                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 128                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 129
 130         if (!load_config(bio_err, NULL))
 131                 goto end;
 132
 133         /* first check the program name */
 134         program_name(argv[0],pname,sizeof pname);
 135         if (strcmp(pname,"base64") == 0)
 136                 base64=1;
 137
 138         cipher=EVP_get_cipherbyname(pname);
 139         if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
 140                 {
 141                 BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
 142                 goto bad;
 143                 }
 144
 145         argc--;
 146         argv++;
 147         while (argc >= 1)
 148                 {
 149                 if      (strcmp(*argv,"-e") == 0)
 150                         enc=1;
 151                 else if (strcmp(*argv,"-in") == 0)
 152                         {
 153                         if (--argc < 1) goto bad;
 154                         inf= *(++argv);
 155                         }
 156                 else if (strcmp(*argv,"-out") == 0)
 157                         {
 158                         if (--argc < 1) goto bad;
 159                         outf= *(++argv);
 160                         }
 161                 else if (strcmp(*argv,"-pass") == 0)
 162                         {
 163                         if (--argc < 1) goto bad;
 164                         passarg= *(++argv);
 165                         }
 166                 else if (strcmp(*argv,"-engine") == 0)
 167                         {
 168                         if (--argc < 1) goto bad;
 169                         engine= *(++argv);
 170                         }
 171                 else if (strcmp(*argv,"-d") == 0)
 172                         enc=0;
 173                 else if (strcmp(*argv,"-p") == 0)
 174                         printkey=1;
 175                 else if (strcmp(*argv,"-v") == 0)
 176                         verbose=1;
 177                 else if (strcmp(*argv,"-nopad") == 0)
 178                         nopad=1;
 179                 else if (strcmp(*argv,"-salt") == 0)
 180                         nosalt=0;
 181                 else if (strcmp(*argv,"-nosalt") == 0)
 182                         nosalt=1;
 183                 else if (strcmp(*argv,"-debug") == 0)
 184                         debug=1;
 185                 else if (strcmp(*argv,"-P") == 0)
 186                         printkey=2;
 187                 else if (strcmp(*argv,"-A") == 0)
 188                         olb64=1;
 189                 else if (strcmp(*argv,"-a") == 0)
 190                         base64=1;
 191                 else if (strcmp(*argv,"-base64") == 0)
 192                         base64=1;
 193                 else if (strcmp(*argv,"-bufsize") == 0)
 194                         {
 195                         if (--argc < 1) goto bad;
 196                         bufsize=(unsigned char *)*(++argv);
 197                         }
 198                 else if (strcmp(*argv,"-k") == 0)
 199                         {
 200                         if (--argc < 1) goto bad;
 201                         str= *(++argv);
 202                         }
 203                 else if (strcmp(*argv,"-kfile") == 0)
 204                         {
 205                         static char buf[128];
 206                         FILE *infile;
 207                         char *file;
 208
 209                         if (--argc < 1) goto bad;
 210                         file= *(++argv);
 211                         infile=fopen(file,"r");
 212                         if (infile == NULL)
 213                                 {
 214                                 BIO_printf(bio_err,"unable to read key from '%s'\n",
 215                                         file);
 216                                 goto bad;
 217                                 }
 218                         buf[0]='\0';
 219                         fgets(buf,sizeof buf,infile);
 220                         fclose(infile);
 221                         i=strlen(buf);
 222                         if ((i > 0) &&
 223                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 224                                 buf[--i]='\0';
 225                         if ((i > 0) &&
 226                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 227                                 buf[--i]='\0';
 228                         if (i < 1)
 229                                 {
 230                                 BIO_printf(bio_err,"zero length password\n");
 231                                 goto bad;
 232                                 }
 233                         str=buf;
 234                         }
 235                 else if (strcmp(*argv,"-K") == 0)
 236                         {
 237                         if (--argc < 1) goto bad;
 238                         hkey= *(++argv);
 239                         }
 240                 else if (strcmp(*argv,"-S") == 0)
 241                         {
 242                         if (--argc < 1) goto bad;
 243                         hsalt= *(++argv);
 244                         }
 245                 else if (strcmp(*argv,"-iv") == 0)
 246                         {
 247                         if (--argc < 1) goto bad;
 248                         hiv= *(++argv);
 249                         }
 250                 else if ((argv[0][0] == '-') &&
 251                         ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
 252                         {
 253                         cipher=c;
 254                         }
 255                 else if (strcmp(*argv,"-none") == 0)
 256                         cipher=NULL;
 257                 else
 258                         {
 259                         BIO_printf(bio_err,"unknown option '%s'\n",*argv);
 260 bad:
 261                         BIO_printf(bio_err,"options are\n");
 262                         BIO_printf(bio_err,"%-14s input file\n","-in <file>");
 263                         BIO_printf(bio_err,"%-14s output file\n","-out <file>");
 264                         BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>");
 265                         BIO_printf(bio_err,"%-14s encrypt\n","-e");
 266                         BIO_printf(bio_err,"%-14s decrypt\n","-d");
 267                         BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
 268                         BIO_printf(bio_err,"%-14s key is the next argument\n","-k");
 269                         BIO_printf(bio_err,"%-14s key is the first line of the file argument\n","-kfile");
 270                         BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
 271                         BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
 272                         BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
 273                         BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e");
 274
 275                         BIO_printf(bio_err,"Cipher Types\n");
 276                         OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
 277                                                show_ciphers,
 278                                                bio_err);
 279                         BIO_printf(bio_err,"\n");
 280
 281                         goto end;
 282                         }
 283                 argc--;
 284                 argv++;
 285                 }
 286
 287         e = setup_engine(bio_err, engine, 0);
 288
 289         if (bufsize != NULL)
 290                 {
 291                 unsigned long n;
 292
 293                 for (n=0; *bufsize; bufsize++)
 294                         {
 295                         i= *bufsize;
 296                         if ((i <= '9') && (i >= '0'))
 297                                 n=n*10+i-'0';
 298                         else if (i == 'k')
 299                                 {
 300                                 n*=1024;
 301                                 bufsize++;
 302                                 break;
 303                                 }
 304                         }
 305                 if (*bufsize != '\0')
 306                         {
 307                         BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
 308                         goto end;
 309                         }
 310
 311                 /* It must be large enough for a base64 encoded line */
 312                 if (n < 80) n=80;
 313
 314                 bsize=(int)n;
 315                 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
 316                 }
 317
 318         strbuf=OPENSSL_malloc(SIZE);
 319         buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize));
 320         if ((buff == NULL) || (strbuf == NULL))
 321                 {
 322                 BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
 323                 goto end;
 324                 }
 325
 326         in=BIO_new(BIO_s_file());
 327         out=BIO_new(BIO_s_file());
 328         if ((in == NULL) || (out == NULL))
 329                 {
 330                 ERR_print_errors(bio_err);
 331                 goto end;
 332                 }
 333         if (debug)
 334                 {
 335                 BIO_set_callback(in,BIO_debug_callback);
 336                 BIO_set_callback(out,BIO_debug_callback);
 337                 BIO_set_callback_arg(in,bio_err);
 338                 BIO_set_callback_arg(out,bio_err);
 339                 }
 340
 341         if (inf == NULL)
 342                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 343         else
 344                 {
 345                 if (BIO_read_filename(in,inf) <= 0)
 346                         {
 347                         perror(inf);
 348                         goto end;
 349                         }
 350                 }
 351
 352         if(!str && passarg) {
 353                 if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
 354                         BIO_printf(bio_err, "Error getting password\n");
 355                         goto end;
 356                 }
 357                 str = pass;
 358         }
 359
 360         if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
 361                 {
 362                 for (;;)
 363                         {
 364                         char buf[200];
 365
 366                         sprintf(buf,"enter %s %s password:",
 367                                 OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
 368                                 (enc)?"encryption":"decryption");
 369                         strbuf[0]='\0';
 370                         i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
 371                         if (i == 0)
 372                                 {
 373                                 if (strbuf[0] == '\0')
 374                                         {
 375                                         ret=1;
 376                                         goto end;
 377                                         }
 378                                 str=strbuf;
 379                                 break;
 380                                 }
 381                         if (i < 0)
 382                                 {
 383                                 BIO_printf(bio_err,"bad password read\n");
 384                                 goto end;
 385                                 }
 386                         }
 387                 }
 388
 389
 390         if (outf == NULL)
 391                 {
 392                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 393 #ifdef OPENSSL_SYS_VMS
 394                 {
 395                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 396                 out = BIO_push(tmpbio, out);
 397                 }
 398 #endif
 399                 }
 400         else
 401                 {
 402                 if (BIO_write_filename(out,outf) <= 0)
 403                         {
 404                         perror(outf);
 405                         goto end;
 406                         }
 407                 }
 408
 409         rbio=in;
 410         wbio=out;
 411
 412         if (base64)
 413                 {
 414                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
 415                         goto end;
 416                 if (debug)
 417                         {
 418                         BIO_set_callback(b64,BIO_debug_callback);
 419                         BIO_set_callback_arg(b64,bio_err);
 420                         }
 421                 if (olb64)
 422                         BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
 423                 if (enc)
 424                         wbio=BIO_push(b64,wbio);
 425                 else
 426                         rbio=BIO_push(b64,rbio);
 427                 }
 428
 429         if (cipher != NULL)
 430                 {
 431                 /* Note that str is NULL if a key was passed on the command
 432                  * line, so we get no salt in that case. Is this a bug?
 433                  */
 434                 if (str != NULL)
 435                         {
 436                         /* Salt handling: if encrypting generate a salt and
 437                          * write to output BIO. If decrypting read salt from
 438                          * input BIO.
 439                          */
 440                         unsigned char *sptr;
 441                         if(nosalt) sptr = NULL;
 442                         else {
 443                                 if(enc) {
 444                                         if(hsalt) {
 445                                                 if(!set_hex(hsalt,salt,sizeof salt)) {
 446                                                         BIO_printf(bio_err,
 447                                                                 "invalid hex salt value\n");
 448                                                         goto end;
 449                                                 }
 450                                         } else if (RAND_pseudo_bytes(salt, sizeof salt) < 0)
 451                                                 goto end;
 452                                         /* If -P option then don't bother writing */
 453                                         if((printkey != 2)
 454                                            && (BIO_write(wbio,magic,
 455                                                          sizeof magic-1) != sizeof magic-1
 456                                                || BIO_write(wbio,
 457                                                             (char *)salt,
 458                                                             sizeof salt) != sizeof salt)) {
 459                                                 BIO_printf(bio_err,"error writing output file\n");
 460                                                 goto end;
 461                                         }
 462                                 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
 463                                           || BIO_read(rbio,
 464                                                       (unsigned char *)salt,
 465                                     sizeof salt) != sizeof salt) {
 466                                         BIO_printf(bio_err,"error reading input file\n");
 467                                         goto end;
 468                                 } else if(memcmp(mbuf,magic,sizeof magic-1)) {
 469                                     BIO_printf(bio_err,"bad magic number\n");
 470                                     goto end;
 471                                 }
 472
 473                                 sptr = salt;
 474                         }
 475
 476                         EVP_BytesToKey(cipher,EVP_md5(),sptr,
 477                                 (unsigned char *)str,
 478                                 strlen(str),1,key,iv);
 479                         /* zero the complete buffer or the string
 480                          * passed from the command line
 481                          * bug picked up by
 482                          * Larry J. Hughes Jr. <hughes@indiana.edu> */
 483                         if (str == strbuf)
 484                                 OPENSSL_cleanse(str,SIZE);
 485                         else
 486                                 OPENSSL_cleanse(str,strlen(str));
 487                         }
 488                 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv))
 489                         {
 490                         BIO_printf(bio_err,"invalid hex iv value\n");
 491                         goto end;
 492                         }
 493                 if ((hiv == NULL) && (str == NULL))
 494                         {
 495                         /* No IV was explicitly set and no IV was generated
 496                          * during EVP_BytesToKey. Hence the IV is undefined,
 497                          * making correct decryption impossible. */
 498                         BIO_printf(bio_err, "iv undefined\n");
 499                         goto end;
 500                         }
 501                 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key))
 502                         {
 503                         BIO_printf(bio_err,"invalid hex key value\n");
 504                         goto end;
 505                         }
 506
 507                 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
 508                         goto end;
 509                 BIO_set_cipher(benc,cipher,key,iv,enc);
 510                 if (nopad)
 511                         {
 512                         EVP_CIPHER_CTX *ctx;
 513                         BIO_get_cipher_ctx(benc, &ctx);
 514                         EVP_CIPHER_CTX_set_padding(ctx, 0);
 515                         }
 516                 if (debug)
 517                         {
 518                         BIO_set_callback(benc,BIO_debug_callback);
 519                         BIO_set_callback_arg(benc,bio_err);
 520                         }
 521
 522                 if (printkey)
 523                         {
 524                         if (!nosalt)
 525                                 {
 526                                 printf("salt=");
 527                                 for (i=0; i<sizeof salt; i++)
 528                                         printf("%02X",salt[i]);
 529                                 printf("\n");
 530                                 }
 531                         if (cipher->key_len > 0)
 532                                 {
 533                                 printf("key=");
 534                                 for (i=0; i<cipher->key_len; i++)
 535                                         printf("%02X",key[i]);
 536                                 printf("\n");
 537                                 }
 538                         if (cipher->iv_len > 0)
 539                                 {
 540                                 printf("iv =");
 541                                 for (i=0; i<cipher->iv_len; i++)
 542                                         printf("%02X",iv[i]);
 543                                 printf("\n");
 544                                 }
 545                         if (printkey == 2)
 546                                 {
 547                                 ret=0;
 548                                 goto end;
 549                                 }
 550                         }
 551                 }
 552
 553         /* Only encrypt/decrypt as we write the file */
 554         if (benc != NULL)
 555                 wbio=BIO_push(benc,wbio);
 556
 557         for (;;)
 558                 {
 559                 inl=BIO_read(rbio,(char *)buff,bsize);
 560                 if (inl <= 0) break;
 561                 if (BIO_write(wbio,(char *)buff,inl) != inl)
 562                         {
 563                         BIO_printf(bio_err,"error writing output file\n");
 564                         goto end;
 565                         }
 566                 }
 567         if (!BIO_flush(wbio))
 568                 {
 569                 BIO_printf(bio_err,"bad decrypt\n");
 570                 goto end;
 571                 }
 572
 573         ret=0;
 574         if (verbose)
 575                 {
 576                 BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
 577                 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
 578                 }
 579 end:
 580         ERR_print_errors(bio_err);
 581         if (strbuf != NULL) OPENSSL_free(strbuf);
 582         if (buff != NULL) OPENSSL_free(buff);
 583         if (in != NULL) BIO_free(in);
 584         if (out != NULL) BIO_free_all(out);
 585         if (benc != NULL) BIO_free(benc);
 586         if (b64 != NULL) BIO_free(b64);
 587         if(pass) OPENSSL_free(pass);
 588         apps_shutdown();
 589         EXIT(ret);
 590         }
 591
 592 int set_hex(char *in, unsigned char *out, int size)
 593         {
 594         int i,n;
 595         unsigned char j;
 596
 597         n=strlen(in);
 598         if (n > (size*2))
 599                 {
 600                 BIO_printf(bio_err,"hex string is too long\n");
 601                 return(0);
 602                 }
 603         memset(out,0,size);
 604         for (i=0; i<n; i++)
 605                 {
 606                 j=(unsigned char)*in;
 607                 *(in++)='\0';
 608                 if (j == 0) break;
 609                 if ((j >= '0') && (j <= '9'))
 610                         j-='0';
 611                 else if ((j >= 'A') && (j <= 'F'))
 612                         j=j-'A'+10;
 613                 else if ((j >= 'a') && (j <= 'f'))
 614                         j=j-'a'+10;
 615                 else
 616                         {
 617                         BIO_printf(bio_err,"non-hex digit\n");
 618                         return(0);
 619                         }
 620                 if (i&1)
 621                         out[i/2]|=j;
 622                 else
 623                         out[i/2]=(j<<4);
 624                 }
 625         return(1);
 626         }