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 #ifndef NO_MD5
  70 #include <openssl/md5.h>
  71 #endif
  72 #include <openssl/pem.h>
  73 #include <openssl/engine.h>
  74 #include <ctype.h>
  75
  76 int set_hex(char *in,unsigned char *out,int size);
  77 #undef SIZE
  78 #undef BSIZE
  79 #undef PROG
  80
  81 #define SIZE    (512)
  82 #define BSIZE   (8*1024)
  83 #define PROG    enc_main
  84
  85 void show_ciphers(const OBJ_NAME *name,void *bio_)
  86         {
  87         BIO *bio=bio_;
  88         static int n;
  89
  90         if(!islower(*name->name))
  91                 return;
  92
  93         BIO_printf(bio,"-%-25s",name->name);
  94         if(++n == 3)
  95                 {
  96                 BIO_printf(bio,"\n");
  97                 n=0;
  98                 }
  99         else
 100                 BIO_printf(bio," ");
 101         }
 102
 103 int MAIN(int, char **);
 104
 105 int MAIN(int argc, char **argv)
 106         {
 107         ENGINE *e = NULL;
 108         static const char magic[]="Salted__";
 109         char mbuf[8];   /* should be 1 smaller than magic */
 110         char *strbuf=NULL;
 111         unsigned char *buff=NULL,*bufsize=NULL;
 112         int bsize=BSIZE,verbose=0;
 113         int ret=1,inl;
 114         unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH];
 115         unsigned char salt[PKCS5_SALT_LEN];
 116         char *str=NULL, *passarg = NULL, *pass = NULL;
 117         char *hkey=NULL,*hiv=NULL,*hsalt = NULL;
 118         int enc=1,printkey=0,i,base64=0;
 119         int debug=0,olb64=0,nosalt=0;
 120         const EVP_CIPHER *cipher=NULL,*c;
 121         char *inf=NULL,*outf=NULL;
 122         BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
 123 #define PROG_NAME_SIZE  16
 124         char pname[PROG_NAME_SIZE];
 125         char *engine = NULL;
 126
 127         apps_startup();
 128
 129         if (bio_err == NULL)
 130                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 131                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 132
 133         /* first check the program name */
 134         program_name(argv[0],pname,PROG_NAME_SIZE);
 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,"-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         if (engine != NULL)
 286                 {
 287                 if((e = ENGINE_by_id(engine)) == NULL)
 288                         {
 289                         BIO_printf(bio_err,"invalid engine \"%s\"\n",
 290                                 engine);
 291                         goto end;
 292                         }
 293                 if(!ENGINE_set_default(e, ENGINE_METHOD_ALL))
 294                         {
 295                         BIO_printf(bio_err,"can't use that engine\n");
 296                         goto end;
 297                         }
 298                 BIO_printf(bio_err,"engine \"%s\" set.\n", engine);
 299                 /* Free our "structural" reference. */
 300                 ENGINE_free(e);
 301                 }
 302
 303         if (bufsize != NULL)
 304                 {
 305                 unsigned long n;
 306
 307                 for (n=0; *bufsize; bufsize++)
 308                         {
 309                         i= *bufsize;
 310                         if ((i <= '9') && (i >= '0'))
 311                                 n=n*10+i-'0';
 312                         else if (i == 'k')
 313                                 {
 314                                 n*=1024;
 315                                 bufsize++;
 316                                 break;
 317                                 }
 318                         }
 319                 if (*bufsize != '\0')
 320                         {
 321                         BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
 322                         goto end;
 323                         }
 324
 325                 /* It must be large enough for a base64 encoded line */
 326                 if (n < 80) n=80;
 327
 328                 bsize=(int)n;
 329                 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
 330                 }
 331
 332         strbuf=OPENSSL_malloc(SIZE);
 333         buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize));
 334         if ((buff == NULL) || (strbuf == NULL))
 335                 {
 336                 BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
 337                 goto end;
 338                 }
 339
 340         in=BIO_new(BIO_s_file());
 341         out=BIO_new(BIO_s_file());
 342         if ((in == NULL) || (out == NULL))
 343                 {
 344                 ERR_print_errors(bio_err);
 345                 goto end;
 346                 }
 347         if (debug)
 348                 {
 349                 BIO_set_callback(in,BIO_debug_callback);
 350                 BIO_set_callback(out,BIO_debug_callback);
 351                 BIO_set_callback_arg(in,bio_err);
 352                 BIO_set_callback_arg(out,bio_err);
 353                 }
 354
 355         if (inf == NULL)
 356                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 357         else
 358                 {
 359                 if (BIO_read_filename(in,inf) <= 0)
 360                         {
 361                         perror(inf);
 362                         goto end;
 363                         }
 364                 }
 365
 366         if(!str && passarg) {
 367                 if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
 368                         BIO_printf(bio_err, "Error getting password\n");
 369                         goto end;
 370                 }
 371                 str = pass;
 372         }
 373
 374         if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
 375                 {
 376                 for (;;)
 377                         {
 378                         char buf[200];
 379
 380                         sprintf(buf,"enter %s %s password:",
 381                                 OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
 382                                 (enc)?"encryption":"decryption");
 383                         strbuf[0]='\0';
 384                         i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
 385                         if (i == 0)
 386                                 {
 387                                 if (strbuf[0] == '\0')
 388                                         {
 389                                         ret=1;
 390                                         goto end;
 391                                         }
 392                                 str=strbuf;
 393                                 break;
 394                                 }
 395                         if (i < 0)
 396                                 {
 397                                 BIO_printf(bio_err,"bad password read\n");
 398                                 goto end;
 399                                 }
 400                         }
 401                 }
 402
 403
 404         if (outf == NULL)
 405                 {
 406                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 407 #ifdef VMS
 408                 {
 409                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 410                 out = BIO_push(tmpbio, out);
 411                 }
 412 #endif
 413                 }
 414         else
 415                 {
 416                 if (BIO_write_filename(out,outf) <= 0)
 417                         {
 418                         perror(outf);
 419                         goto end;
 420                         }
 421                 }
 422
 423         rbio=in;
 424         wbio=out;
 425
 426         if (base64)
 427                 {
 428                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
 429                         goto end;
 430                 if (debug)
 431                         {
 432                         BIO_set_callback(b64,BIO_debug_callback);
 433                         BIO_set_callback_arg(b64,bio_err);
 434                         }
 435                 if (olb64)
 436                         BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
 437                 if (enc)
 438                         wbio=BIO_push(b64,wbio);
 439                 else
 440                         rbio=BIO_push(b64,rbio);
 441                 }
 442
 443         if (cipher != NULL)
 444                 {
 445                 if (str != NULL)
 446                         {
 447                         /* Salt handling: if encrypting generate a salt and
 448                          * write to output BIO. If decrypting read salt from
 449                          * input BIO.
 450                          */
 451                         unsigned char *sptr;
 452                         if(nosalt) sptr = NULL;
 453                         else {
 454                                 if(enc) {
 455                                         if(hsalt) {
 456                                                 if(!set_hex(hsalt,salt,PKCS5_SALT_LEN)) {
 457                                                         BIO_printf(bio_err,
 458                                                                 "invalid hex salt value\n");
 459                                                         goto end;
 460                                                 }
 461                                         } else if (RAND_pseudo_bytes(salt, PKCS5_SALT_LEN) < 0)
 462                                                 goto end;
 463                                         /* If -P option then don't bother writing */
 464                                         if((printkey != 2)
 465                                            && (BIO_write(wbio,magic,
 466                                                          sizeof magic-1) != sizeof magic-1
 467                                                || BIO_write(wbio,
 468                                                             (char *)salt,
 469                                                             PKCS5_SALT_LEN) != PKCS5_SALT_LEN)) {
 470                                                 BIO_printf(bio_err,"error writing output file\n");
 471                                                 goto end;
 472                                         }
 473                                 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
 474                                           || BIO_read(rbio,
 475                                                       (unsigned char *)salt,
 476                                     PKCS5_SALT_LEN) != PKCS5_SALT_LEN) {
 477                                         BIO_printf(bio_err,"error reading input file\n");
 478                                         goto end;
 479                                 } else if(memcmp(mbuf,magic,sizeof magic-1)) {
 480                                     BIO_printf(bio_err,"bad magic number\n");
 481                                     goto end;
 482                                 }
 483
 484                                 sptr = salt;
 485                         }
 486
 487                         EVP_BytesToKey(cipher,EVP_md5(),sptr,
 488                                 (unsigned char *)str,
 489                                 strlen(str),1,key,iv);
 490                         /* zero the complete buffer or the string
 491                          * passed from the command line
 492                          * bug picked up by
 493                          * Larry J. Hughes Jr. <hughes@indiana.edu> */
 494                         if (str == strbuf)
 495                                 memset(str,0,SIZE);
 496                         else
 497                                 memset(str,0,strlen(str));
 498                         }
 499                 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv))
 500                         {
 501                         BIO_printf(bio_err,"invalid hex iv value\n");
 502                         goto end;
 503                         }
 504                 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key))
 505                         {
 506                         BIO_printf(bio_err,"invalid hex key value\n");
 507                         goto end;
 508                         }
 509
 510                 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
 511                         goto end;
 512                 BIO_set_cipher(benc,cipher,key,iv,enc);
 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         EXIT(ret);
 586         }
 587
 588 int set_hex(char *in, unsigned char *out, int size)
 589         {
 590         int i,n;
 591         unsigned char j;
 592
 593         n=strlen(in);
 594         if (n > (size*2))
 595                 {
 596                 BIO_printf(bio_err,"hex string is too long\n");
 597                 return(0);
 598                 }
 599         memset(out,0,size);
 600         for (i=0; i<n; i++)
 601                 {
 602                 j=(unsigned char)*in;
 603                 *(in++)='\0';
 604                 if (j == 0) break;
 605                 if ((j >= '0') && (j <= '9'))
 606                         j-='0';
 607                 else if ((j >= 'A') && (j <= 'F'))
 608                         j=j-'A'+10;
 609                 else if ((j >= 'a') && (j <= 'f'))
 610                         j=j-'a'+10;
 611                 else
 612                         {
 613                         BIO_printf(bio_err,"non-hex digit\n");
 614                         return(0);
 615                         }
 616                 if (i&1)
 617                         out[i/2]|=j;
 618                 else
 619                         out[i/2]=(j<<4);
 620                 }
 621         return(1);
 622         }