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 "bio.h"
  64 #include "err.h"
  65 #include "evp.h"
  66 #include "objects.h"
  67 #include "x509.h"
  68 #ifdef NO_MD5
  69 #include "md5.h"
  70 #endif
  71 #include "pem.h"
  72
  73 #ifndef NOPROTO
  74 int set_hex(char *in,unsigned char *out,int size);
  75 #else
  76 int set_hex();
  77 #endif
  78
  79 #undef SIZE
  80 #undef BSIZE
  81 #undef PROG
  82
  83 #define SIZE    (512)
  84 #define BSIZE   (8*1024)
  85 #define PROG    enc_main
  86
  87 int MAIN(argc,argv)
  88 int argc;
  89 char **argv;
  90         {
  91         char *strbuf=NULL;
  92         unsigned char *buff=NULL,*bufsize=NULL;
  93         int bsize=BSIZE,verbose=0;
  94         int ret=1,inl;
  95         unsigned char key[24],iv[MD5_DIGEST_LENGTH];
  96         char *str=NULL;
  97         char *hkey=NULL,*hiv=NULL;
  98         int enc=1,printkey=0,i,base64=0;
  99         int debug=0,olb64=0;
 100         EVP_CIPHER *cipher=NULL,*c;
 101         char *inf=NULL,*outf=NULL;
 102         BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
 103 #define PROG_NAME_SIZE  16
 104         char pname[PROG_NAME_SIZE];
 105
 106         apps_startup();
 107
 108         if (bio_err == NULL)
 109                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 110                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 111
 112         /* first check the program name */
 113         program_name(argv[0],pname,PROG_NAME_SIZE);
 114         if (strcmp(pname,"base64") == 0)
 115                 base64=1;
 116
 117         cipher=EVP_get_cipherbyname(pname);
 118         if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
 119                 {
 120                 BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
 121                 goto bad;
 122                 }
 123
 124         argc--;
 125         argv++;
 126         while (argc >= 1)
 127                 {
 128                 if      (strcmp(*argv,"-e") == 0)
 129                         enc=1;
 130                 else if (strcmp(*argv,"-in") == 0)
 131                         {
 132                         if (--argc < 1) goto bad;
 133                         inf= *(++argv);
 134                         }
 135                 else if (strcmp(*argv,"-out") == 0)
 136                         {
 137                         if (--argc < 1) goto bad;
 138                         outf= *(++argv);
 139                         }
 140                 else if (strcmp(*argv,"-d") == 0)
 141                         enc=0;
 142                 else if (strcmp(*argv,"-p") == 0)
 143                         printkey=1;
 144                 else if (strcmp(*argv,"-v") == 0)
 145                         verbose=1;
 146                 else if ((strcmp(*argv,"-debug") == 0) ||
 147                          (strcmp(*argv,"-d") == 0))
 148                         debug=1;
 149                 else if (strcmp(*argv,"-P") == 0)
 150                         printkey=2;
 151                 else if (strcmp(*argv,"-A") == 0)
 152                         olb64=1;
 153                 else if (strcmp(*argv,"-a") == 0)
 154                         base64=1;
 155                 else if (strcmp(*argv,"-base64") == 0)
 156                         base64=1;
 157                 else if (strcmp(*argv,"-bufsize") == 0)
 158                         {
 159                         if (--argc < 1) goto bad;
 160                         bufsize=(unsigned char *)*(++argv);
 161                         }
 162                 else if (strcmp(*argv,"-k") == 0)
 163                         {
 164                         if (--argc < 1) goto bad;
 165                         str= *(++argv);
 166                         }
 167                 else if (strcmp(*argv,"-kfile") == 0)
 168                         {
 169                         static char buf[128];
 170                         FILE *infile;
 171                         char *file;
 172
 173                         if (--argc < 1) goto bad;
 174                         file= *(++argv);
 175                         infile=fopen(file,"r");
 176                         if (infile == NULL)
 177                                 {
 178                                 BIO_printf(bio_err,"unable to read key from '%s'\n",
 179                                         file);
 180                                 goto bad;
 181                                 }
 182                         buf[0]='\0';
 183                         fgets(buf,128,infile);
 184                         fclose(infile);
 185                         i=strlen(buf);
 186                         if ((i > 0) &&
 187                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 188                                 buf[--i]='\0';
 189                         if ((i > 0) &&
 190                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 191                                 buf[--i]='\0';
 192                         if (i < 1)
 193                                 {
 194                                 BIO_printf(bio_err,"zero length password\n");
 195                                 goto bad;
 196                                 }
 197                         str=buf;
 198                         }
 199                 else if (strcmp(*argv,"-K") == 0)
 200                         {
 201                         if (--argc < 1) goto bad;
 202                         hkey= *(++argv);
 203                         }
 204                 else if (strcmp(*argv,"-iv") == 0)
 205                         {
 206                         if (--argc < 1) goto bad;
 207                         hiv= *(++argv);
 208                         }
 209                 else if ((argv[0][0] == '-') &&
 210                         ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
 211                         {
 212                         cipher=c;
 213                         }
 214                 else if (strcmp(*argv,"-none") == 0)
 215                         cipher=NULL;
 216                 else
 217                         {
 218                         BIO_printf(bio_err,"unknown option '%s'\n",*argv);
 219 bad:
 220                         BIO_printf(bio_err,"options are\n");
 221                         BIO_printf(bio_err,"%-14s input file\n","-in <file>");
 222                         BIO_printf(bio_err,"%-14s output fileencrypt\n","-out <file>");
 223                         BIO_printf(bio_err,"%-14s encrypt\n","-e");
 224                         BIO_printf(bio_err,"%-14s decrypt\n","-d");
 225                         BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
 226                         BIO_printf(bio_err,"%-14s key is the next argument\n","-k");
 227                         BIO_printf(bio_err,"%-14s key is the first line of the file argument\n","-kfile");
 228                         BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
 229                         BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
 230                         BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
 231
 232                         BIO_printf(bio_err,"Cipher Types\n");
 233                         BIO_printf(bio_err,"des     : 56 bit key DES encryption\n");
 234                         BIO_printf(bio_err,"des_ede :112 bit key ede DES encryption\n");
 235                         BIO_printf(bio_err,"des_ede3:168 bit key ede DES encryption\n");
 236 #ifndef NO_IDEA
 237                         BIO_printf(bio_err,"idea    :128 bit key IDEA encryption\n");
 238 #endif
 239 #ifndef NO_RC4
 240                         BIO_printf(bio_err,"rc2     :128 bit key RC2 encryption\n");
 241 #endif
 242 #ifndef NO_BLOWFISH
 243                         BIO_printf(bio_err,"bf      :128 bit key BlowFish encryption\n");
 244 #endif
 245 #ifndef NO_RC4
 246                         BIO_printf(bio_err," -%-5s :128 bit key RC4 encryption\n",
 247                                 LN_rc4);
 248 #endif
 249
 250                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 251                                 LN_des_ecb,LN_des_cbc,
 252                                 LN_des_cfb64,LN_des_ofb64);
 253                         BIO_printf(bio_err," -%-4s (%s)\n",
 254                                 "des", LN_des_cbc);
 255
 256                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 257                                 LN_des_ede,LN_des_ede_cbc,
 258                                 LN_des_ede_cfb64,LN_des_ede_ofb64);
 259                         BIO_printf(bio_err," -desx -none\n");
 260
 261
 262                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 263                                 LN_des_ede3,LN_des_ede3_cbc,
 264                                 LN_des_ede3_cfb64,LN_des_ede3_ofb64);
 265                         BIO_printf(bio_err," -%-4s (%s)\n",
 266                                 "des3", LN_des_ede3_cbc);
 267
 268 #ifndef NO_IDEA
 269                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 270                                 LN_idea_ecb, LN_idea_cbc,
 271                                 LN_idea_cfb64, LN_idea_ofb64);
 272                         BIO_printf(bio_err," -%-4s (%s)\n","idea",LN_idea_cbc);
 273 #endif
 274 #ifndef NO_RC2
 275                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 276                                 LN_rc2_ecb, LN_rc2_cbc,
 277                                 LN_rc2_cfb64, LN_rc2_ofb64);
 278                         BIO_printf(bio_err," -%-4s (%s)\n","rc2", LN_rc2_cbc);
 279 #endif
 280 #ifndef NO_BLOWFISH
 281                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 282                                 LN_bf_ecb, LN_bf_cbc,
 283                                 LN_bf_cfb64, LN_bf_ofb64);
 284                         BIO_printf(bio_err," -%-4s (%s)\n","bf", LN_bf_cbc);
 285 #endif
 286 #ifndef NO_BLOWFISH
 287                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 288                                 LN_cast5_ecb, LN_cast5_cbc,
 289                                 LN_cast5_cfb64, LN_cast5_ofb64);
 290                         BIO_printf(bio_err," -%-4s (%s)\n","cast", LN_cast5_cbc);
 291 #endif
 292 #ifndef NO_BLOWFISH
 293                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 294                                 LN_rc5_ecb, LN_rc5_cbc,
 295                                 LN_rc5_cfb64, LN_rc5_ofb64);
 296                         BIO_printf(bio_err," -%-4s (%s)\n","rc5", LN_rc5_cbc);
 297 #endif
 298                         goto end;
 299                         }
 300                 argc--;
 301                 argv++;
 302                 }
 303
 304         if (bufsize != NULL)
 305                 {
 306                 unsigned long n;
 307
 308                 for (n=0; *bufsize; bufsize++)
 309                         {
 310                         i= *bufsize;
 311                         if ((i <= '9') && (i >= '0'))
 312                                 n=n*10+i-'0';
 313                         else if (i == 'k')
 314                                 {
 315                                 n*=1024;
 316                                 bufsize++;
 317                                 break;
 318                                 }
 319                         }
 320                 if (*bufsize != '\0')
 321                         {
 322                         BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
 323                         goto end;
 324                         }
 325
 326                 /* It must be large enough for a base64 encoded line */
 327                 if (n < 80) n=80;
 328
 329                 bsize=(int)n;
 330                 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
 331                 }
 332
 333         strbuf=Malloc(SIZE);
 334         buff=(unsigned char *)Malloc(EVP_ENCODE_LENGTH(bsize));
 335         if ((buff == NULL) || (strbuf == NULL))
 336                 {
 337                 BIO_printf(bio_err,"Malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
 338                 goto end;
 339                 }
 340
 341         in=BIO_new(BIO_s_file());
 342         out=BIO_new(BIO_s_file());
 343         if ((in == NULL) || (out == NULL))
 344                 {
 345                 ERR_print_errors(bio_err);
 346                 goto end;
 347                 }
 348         if (debug)
 349                 {
 350                 BIO_set_callback(in,BIO_debug_callback);
 351                 BIO_set_callback(out,BIO_debug_callback);
 352                 BIO_set_callback_arg(in,bio_err);
 353                 BIO_set_callback_arg(out,bio_err);
 354                 }
 355
 356         if (inf == NULL)
 357                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 358         else
 359                 {
 360                 if (BIO_read_filename(in,inf) <= 0)
 361                         {
 362                         perror(inf);
 363                         goto end;
 364                         }
 365                 }
 366
 367         if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
 368                 {
 369                 for (;;)
 370                         {
 371                         char buf[200];
 372
 373                         sprintf(buf,"enter %s %s password:",
 374                                 OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
 375                                 (enc)?"encryption":"decryption");
 376                         strbuf[0]='\0';
 377                         i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
 378                         if (i == 0)
 379                                 {
 380                                 if (strbuf[0] == '\0')
 381                                         {
 382                                         ret=1;
 383                                         goto end;
 384                                         }
 385                                 str=strbuf;
 386                                 break;
 387                                 }
 388                         if (i < 0)
 389                                 {
 390                                 BIO_printf(bio_err,"bad password read\n");
 391                                 goto end;
 392                                 }
 393                         }
 394                 }
 395
 396         if (cipher != NULL)
 397                 {
 398                 if (str != NULL)
 399                         {
 400                         EVP_BytesToKey(cipher,EVP_md5(),NULL,
 401                                 (unsigned char *)str,
 402                                 strlen(str),1,key,iv);
 403                         /* zero the complete buffer or the string
 404                          * passed from the command line
 405                          * bug picked up by
 406                          * Larry J. Hughes Jr. <hughes@indiana.edu> */
 407                         if (str == strbuf)
 408                                 memset(str,0,SIZE);
 409                         else
 410                                 memset(str,0,strlen(str));
 411                         }
 412                 if ((hiv != NULL) && !set_hex(hiv,iv,8))
 413                         {
 414                         BIO_printf(bio_err,"invalid hex iv value\n");
 415                         goto end;
 416                         }
 417                 if ((hkey != NULL) && !set_hex(hkey,key,24))
 418                         {
 419                         BIO_printf(bio_err,"invalid hex key value\n");
 420                         goto end;
 421                         }
 422
 423                 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
 424                         goto end;
 425                 BIO_set_cipher(benc,cipher,key,iv,enc);
 426                 if (debug)
 427                         {
 428                         BIO_set_callback(benc,BIO_debug_callback);
 429                         BIO_set_callback_arg(benc,bio_err);
 430                         }
 431
 432                 if (printkey)
 433                         {
 434                         if (cipher->key_len > 0)
 435                                 {
 436                                 printf("key=");
 437                                 for (i=0; i<cipher->key_len; i++)
 438                                         printf("%02X",key[i]);
 439                                 printf("\n");
 440                                 }
 441                         if (cipher->iv_len > 0)
 442                                 {
 443                                 printf("iv =");
 444                                 for (i=0; i<cipher->iv_len; i++)
 445                                         printf("%02X",iv[i]);
 446                                 printf("\n");
 447                                 }
 448                         if (printkey == 2)
 449                                 {
 450                                 ret=0;
 451                                 goto end;
 452                                 }
 453                         }
 454                 }
 455
 456
 457         if (outf == NULL)
 458                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 459         else
 460                 {
 461                 if (BIO_write_filename(out,outf) <= 0)
 462                         {
 463                         perror(outf);
 464                         goto end;
 465                         }
 466                 }
 467
 468         rbio=in;
 469         wbio=out;
 470
 471         if (base64)
 472                 {
 473                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
 474                         goto end;
 475                 if (debug)
 476                         {
 477                         BIO_set_callback(b64,BIO_debug_callback);
 478                         BIO_set_callback_arg(b64,bio_err);
 479                         }
 480                 if (olb64)
 481                         BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
 482                 if (enc)
 483                         wbio=BIO_push(b64,wbio);
 484                 else
 485                         rbio=BIO_push(b64,rbio);
 486                 }
 487
 488         /* Only encrypt/decrypt as we write the file */
 489         if (benc != NULL)
 490                 wbio=BIO_push(benc,wbio);
 491
 492         for (;;)
 493                 {
 494                 inl=BIO_read(rbio,(char *)buff,bsize);
 495                 if (inl <= 0) break;
 496                 if (BIO_write(wbio,(char *)buff,inl) != inl)
 497                         {
 498                         BIO_printf(bio_err,"error writing output file\n");
 499                         goto end;
 500                         }
 501                 }
 502         if (!BIO_flush(wbio))
 503                 {
 504                 BIO_printf(bio_err,"bad decrypt\n");
 505                 goto end;
 506                 }
 507
 508         ret=0;
 509         if (verbose)
 510                 {
 511                 BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
 512                 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
 513                 }
 514 end:
 515         if (strbuf != NULL) Free(strbuf);
 516         if (buff != NULL) Free(buff);
 517         if (in != NULL) BIO_free(in);
 518         if (out != NULL) BIO_free(out);
 519         if (benc != NULL) BIO_free(benc);
 520         if (b64 != NULL) BIO_free(b64);
 521         EXIT(ret);
 522         }
 523
 524 int set_hex(in,out,size)
 525 char *in;
 526 unsigned char *out;
 527 int size;
 528         {
 529         int i,n;
 530         unsigned char j;
 531
 532         n=strlen(in);
 533         if (n > (size*2))
 534                 {
 535                 BIO_printf(bio_err,"hex string is too long\n");
 536                 return(0);
 537                 }
 538         memset(out,0,size);
 539         for (i=0; i<n; i++)
 540                 {
 541                 j=(unsigned char)*in;
 542                 *(in++)='\0';
 543                 if (j == 0) break;
 544                 if ((j >= '0') && (j <= '9'))
 545                         j-='0';
 546                 else if ((j >= 'A') && (j <= 'F'))
 547                         j=j-'A'+10;
 548                 else if ((j >= 'a') && (j <= 'f'))
 549                         j=j-'a'+10;
 550                 else
 551                         {
 552                         BIO_printf(bio_err,"non-hex digit\n");
 553                         return(0);
 554                         }
 555                 if (i&1)
 556                         out[i/2]|=j;
 557                 else
 558                         out[i/2]=(j<<4);
 559                 }
 560         return(1);
 561         }