apps/enc.c

   1 /* apps/enc.c */
   2 /* Copyright (C) 1995-1997 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;
 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);
 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                         base64=1;
 153                 else if (strcmp(*argv,"-base64") == 0)
 154                         base64=1;
 155                 else if (strcmp(*argv,"-bufsize") == 0)
 156                         {
 157                         if (--argc < 1) goto bad;
 158                         bufsize=(unsigned char *)*(++argv);
 159                         }
 160                 else if (strcmp(*argv,"-k") == 0)
 161                         {
 162                         if (--argc < 1) goto bad;
 163                         str= *(++argv);
 164                         }
 165                 else if (strcmp(*argv,"-kfile") == 0)
 166                         {
 167                         static char buf[128];
 168                         FILE *infile;
 169                         char *file;
 170
 171                         if (--argc < 1) goto bad;
 172                         file= *(++argv);
 173                         infile=fopen(file,"r");
 174                         if (infile == NULL)
 175                                 {
 176                                 BIO_printf(bio_err,"unable to read key from '%s'\n",
 177                                         file);
 178                                 goto bad;
 179                                 }
 180                         buf[0]='\0';
 181                         fgets(buf,128,infile);
 182                         fclose(infile);
 183                         i=strlen(buf);
 184                         if ((i > 0) &&
 185                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 186                                 buf[--i]='\0';
 187                         if ((i > 0) &&
 188                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 189                                 buf[--i]='\0';
 190                         if (i < 1)
 191                                 {
 192                                 BIO_printf(bio_err,"zero length password\n");
 193                                 goto bad;
 194                                 }
 195                         str=buf;
 196                         }
 197                 else if (strcmp(*argv,"-K") == 0)
 198                         {
 199                         if (--argc < 1) goto bad;
 200                         hkey= *(++argv);
 201                         }
 202                 else if (strcmp(*argv,"-iv") == 0)
 203                         {
 204                         if (--argc < 1) goto bad;
 205                         hiv= *(++argv);
 206                         }
 207                 else if ((argv[0][0] == '-') &&
 208                         ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
 209                         {
 210                         cipher=c;
 211                         }
 212                 else if (strcmp(*argv,"-none") == 0)
 213                         cipher=NULL;
 214                 else
 215                         {
 216                         BIO_printf(bio_err,"unknown option '%s'\n",*argv);
 217 bad:
 218                         BIO_printf(bio_err,"options are\n");
 219                         BIO_printf(bio_err,"%-14s input file\n","-in <file>");
 220                         BIO_printf(bio_err,"%-14s output fileencrypt\n","-out <file>");
 221                         BIO_printf(bio_err,"%-14s encrypt\n","-e");
 222                         BIO_printf(bio_err,"%-14s decrypt\n","-d");
 223                         BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
 224                         BIO_printf(bio_err,"%-14s key is the next argument\n","-k");
 225                         BIO_printf(bio_err,"%-14s key is the first line of the file argument\n","-kfile");
 226                         BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
 227                         BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
 228                         BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
 229
 230                         BIO_printf(bio_err,"Cipher Types\n");
 231                         BIO_printf(bio_err,"des     : 56 bit key DES encryption\n");
 232                         BIO_printf(bio_err,"des_ede :112 bit key ede DES encryption\n");
 233                         BIO_printf(bio_err,"des_ede3:168 bit key ede DES encryption\n");
 234 #ifndef NO_IDEA
 235                         BIO_printf(bio_err,"idea    :128 bit key IDEA encryption\n");
 236 #endif
 237 #ifndef NO_RC4
 238                         BIO_printf(bio_err,"rc2     :128 bit key RC2 encryption\n");
 239 #endif
 240 #ifndef NO_BLOWFISH
 241                         BIO_printf(bio_err,"bf      :128 bit key BlowFish encryption\n");
 242 #endif
 243 #ifndef NO_RC4
 244                         BIO_printf(bio_err," -%-5s :128 bit key RC4 encryption\n",
 245                                 LN_rc4);
 246 #endif
 247
 248                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 249                                 LN_des_ecb,LN_des_cbc,
 250                                 LN_des_cfb64,LN_des_ofb64);
 251                         BIO_printf(bio_err," -%-4s (%s)\n",
 252                                 "des", LN_des_cbc);
 253
 254                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 255                                 LN_des_ede,LN_des_ede_cbc,
 256                                 LN_des_ede_cfb64,LN_des_ede_ofb64);
 257                         BIO_printf(bio_err," -desx -none\n");
 258
 259
 260                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 261                                 LN_des_ede3,LN_des_ede3_cbc,
 262                                 LN_des_ede3_cfb64,LN_des_ede3_ofb64);
 263                         BIO_printf(bio_err," -%-4s (%s)\n",
 264                                 "des3", LN_des_ede3_cbc);
 265
 266 #ifndef NO_IDEA
 267                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 268                                 LN_idea_ecb, LN_idea_cbc,
 269                                 LN_idea_cfb64, LN_idea_ofb64);
 270                         BIO_printf(bio_err," -%-4s (%s)\n","idea",LN_idea_cbc);
 271 #endif
 272 #ifndef NO_RC2
 273                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 274                                 LN_rc2_ecb, LN_rc2_cbc,
 275                                 LN_rc2_cfb64, LN_rc2_ofb64);
 276                         BIO_printf(bio_err," -%-4s (%s)\n","rc2", LN_rc2_cbc);
 277 #endif
 278 #ifndef NO_BLOWFISH
 279                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 280                                 LN_bf_ecb, LN_bf_cbc,
 281                                 LN_bf_cfb64, LN_bf_ofb64);
 282                         BIO_printf(bio_err," -%-4s (%s)\n","bf", LN_bf_cbc);
 283 #endif
 284                         goto end;
 285                         }
 286                 argc--;
 287                 argv++;
 288                 }
 289
 290         if (bufsize != NULL)
 291                 {
 292                 unsigned long n;
 293
 294                 for (n=0; *bufsize; bufsize++)
 295                         {
 296                         i= *bufsize;
 297                         if ((i <= '9') && (i >= '0'))
 298                                 n=n*10+i-'0';
 299                         else if (i == 'k')
 300                                 {
 301                                 n*=1024;
 302                                 bufsize++;
 303                                 break;
 304                                 }
 305                         }
 306                 if (*bufsize != '\0')
 307                         {
 308                         BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
 309                         goto end;
 310                         }
 311
 312                 /* It must be large enough for a base64 encoded line */
 313                 if (n < 80) n=80;
 314
 315                 bsize=(int)n;
 316                 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
 317                 }
 318
 319         strbuf=Malloc(SIZE);
 320         buff=(unsigned char *)Malloc(EVP_ENCODE_LENGTH(bsize));
 321         if ((buff == NULL) || (strbuf == NULL))
 322                 {
 323                 BIO_printf(bio_err,"Malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
 324                 goto end;
 325                 }
 326
 327         in=BIO_new(BIO_s_file());
 328         out=BIO_new(BIO_s_file());
 329         if ((in == NULL) || (out == NULL))
 330                 {
 331                 ERR_print_errors(bio_err);
 332                 goto end;
 333                 }
 334         if (debug)
 335                 {
 336                 BIO_set_callback(in,BIO_debug_callback);
 337                 BIO_set_callback(out,BIO_debug_callback);
 338                 BIO_set_callback_arg(in,bio_err);
 339                 BIO_set_callback_arg(out,bio_err);
 340                 }
 341
 342         if (inf == NULL)
 343                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 344         else
 345                 {
 346                 if (BIO_read_filename(in,inf) <= 0)
 347                         {
 348                         perror(inf);
 349                         goto end;
 350                         }
 351                 }
 352
 353         if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
 354                 {
 355                 for (;;)
 356                         {
 357                         char buf[200];
 358
 359                         sprintf(buf,"enter %s %s password:",
 360                                 OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
 361                                 (enc)?"encryption":"decryption");
 362                         strbuf[0]='\0';
 363                         i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
 364                         if (i == 0)
 365                                 {
 366                                 if (strbuf[0] == '\0')
 367                                         {
 368                                         ret=1;
 369                                         goto end;
 370                                         }
 371                                 str=strbuf;
 372                                 break;
 373                                 }
 374                         if (i < 0)
 375                                 {
 376                                 BIO_printf(bio_err,"bad password read\n");
 377                                 goto end;
 378                                 }
 379                         }
 380                 }
 381
 382         if (cipher != NULL)
 383                 {
 384                 if (str != NULL)
 385                         {
 386                         EVP_BytesToKey(cipher,EVP_md5(),NULL,
 387                                 (unsigned char *)str,
 388                                 strlen(str),1,key,iv);
 389                         /* zero the complete buffer or the string
 390                          * passed from the command line
 391                          * bug picked up by
 392                          * Larry J. Hughes Jr. <hughes@indiana.edu> */
 393                         if (str == strbuf)
 394                                 memset(str,0,SIZE);
 395                         else
 396                                 memset(str,0,strlen(str));
 397                         }
 398                 if ((hiv != NULL) && !set_hex(hiv,iv,8))
 399                         {
 400                         BIO_printf(bio_err,"invalid hex iv value\n");
 401                         goto end;
 402                         }
 403                 if ((hkey != NULL) && !set_hex(hkey,key,24))
 404                         {
 405                         BIO_printf(bio_err,"invalid hex key value\n");
 406                         goto end;
 407                         }
 408
 409                 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
 410                         goto end;
 411                 BIO_set_cipher(benc,cipher,key,iv,enc);
 412                 if (debug)
 413                         {
 414                         BIO_set_callback(benc,BIO_debug_callback);
 415                         BIO_set_callback_arg(benc,bio_err);
 416                         }
 417
 418                 if (printkey)
 419                         {
 420                         if (cipher->key_len > 0)
 421                                 {
 422                                 printf("key=");
 423                                 for (i=0; i<cipher->key_len; i++)
 424                                         printf("%02X",key[i]);
 425                                 printf("\n");
 426                                 }
 427                         if (cipher->iv_len > 0)
 428                                 {
 429                                 printf("iv =");
 430                                 for (i=0; i<cipher->iv_len; i++)
 431                                         printf("%02X",iv[i]);
 432                                 printf("\n");
 433                                 }
 434                         if (printkey == 2)
 435                                 {
 436                                 ret=0;
 437                                 goto end;
 438                                 }
 439                         }
 440                 }
 441
 442
 443         if (outf == NULL)
 444                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 445         else
 446                 {
 447                 if (BIO_write_filename(out,outf) <= 0)
 448                         {
 449                         perror(outf);
 450                         goto end;
 451                         }
 452                 }
 453
 454         rbio=in;
 455         wbio=out;
 456
 457         if (base64)
 458                 {
 459                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
 460                         goto end;
 461                 if (debug)
 462                         {
 463                         BIO_set_callback(b64,BIO_debug_callback);
 464                         BIO_set_callback_arg(b64,bio_err);
 465                         }
 466                 if (enc)
 467                         wbio=BIO_push(b64,wbio);
 468                 else
 469                         rbio=BIO_push(b64,rbio);
 470                 }
 471
 472         /* Only encrypt/decrypt as we write the file */
 473         if (benc != NULL)
 474                 wbio=BIO_push(benc,wbio);
 475
 476         for (;;)
 477                 {
 478                 inl=BIO_read(rbio,(char *)buff,bsize);
 479                 if (inl <= 0) break;
 480                 if (BIO_write(wbio,(char *)buff,inl) != inl)
 481                         {
 482                         BIO_printf(bio_err,"error writing output file\n");
 483                         goto end;
 484                         }
 485                 }
 486         if (!BIO_flush(wbio))
 487                 {
 488                 BIO_printf(bio_err,"bad decrypt\n");
 489                 goto end;
 490                 }
 491
 492         ret=0;
 493         if (verbose)
 494                 {
 495                 BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
 496                 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
 497                 }
 498 end:
 499         if (strbuf != NULL) Free(strbuf);
 500         if (buff != NULL) Free(buff);
 501         if (in != NULL) BIO_free(in);
 502         if (out != NULL) BIO_free(out);
 503         if (benc != NULL) BIO_free(benc);
 504         if (b64 != NULL) BIO_free(b64);
 505         EXIT(ret);
 506         }
 507
 508 int set_hex(in,out,size)
 509 char *in;
 510 unsigned char *out;
 511 int size;
 512         {
 513         int i,n;
 514         unsigned char j;
 515
 516         n=strlen(in);
 517         if (n > (size*2))
 518                 {
 519                 BIO_printf(bio_err,"hex string is too long\n");
 520                 return(0);
 521                 }
 522         memset(out,0,size);
 523         for (i=0; i<n; i++)
 524                 {
 525                 j=(unsigned char)*in;
 526                 *(in++)='\0';
 527                 if (j == 0) break;
 528                 if ((j >= '0') && (j <= '9'))
 529                         j-='0';
 530                 else if ((j >= 'A') && (j <= 'F'))
 531                         j=j-'A'+10;
 532                 else if ((j >= 'a') && (j <= 'f'))
 533                         j=j-'a'+10;
 534                 else
 535                         {
 536                         BIO_printf(bio_err,"non-hex digit\n");
 537                         return(0);
 538                         }
 539                 if (i&1)
 540                         out[i/2]|=j;
 541                 else
 542                         out[i/2]=(j<<4);
 543                 }
 544         return(1);
 545         }