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