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 #ifndef NO_MD5
  69 #include <openssl/md5.h>
  70 #endif
  71 #include <openssl/pem.h>
  72
  73 int set_hex(char *in,unsigned char *out,int size);
  74 #undef SIZE
  75 #undef BSIZE
  76 #undef PROG
  77
  78 #define SIZE    (512)
  79 #define BSIZE   (8*1024)
  80 #define PROG    enc_main
  81
  82 int MAIN(int argc, char **argv)
  83         {
  84         char *strbuf=NULL;
  85         unsigned char *buff=NULL,*bufsize=NULL;
  86         int bsize=BSIZE,verbose=0;
  87         int ret=1,inl;
  88         unsigned char key[24],iv[MD5_DIGEST_LENGTH];
  89         char *str=NULL;
  90         char *hkey=NULL,*hiv=NULL;
  91         int enc=1,printkey=0,i,base64=0;
  92         int debug=0,olb64=0;
  93         const EVP_CIPHER *cipher=NULL,*c;
  94         char *inf=NULL,*outf=NULL;
  95         BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
  96 #define PROG_NAME_SIZE  16
  97         char pname[PROG_NAME_SIZE];
  98
  99         apps_startup();
 100
 101         if (bio_err == NULL)
 102                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 103                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 104
 105         /* first check the program name */
 106         program_name(argv[0],pname,PROG_NAME_SIZE);
 107         if (strcmp(pname,"base64") == 0)
 108                 base64=1;
 109
 110         cipher=EVP_get_cipherbyname(pname);
 111         if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
 112                 {
 113                 BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
 114                 goto bad;
 115                 }
 116
 117         argc--;
 118         argv++;
 119         while (argc >= 1)
 120                 {
 121                 if      (strcmp(*argv,"-e") == 0)
 122                         enc=1;
 123                 else if (strcmp(*argv,"-in") == 0)
 124                         {
 125                         if (--argc < 1) goto bad;
 126                         inf= *(++argv);
 127                         }
 128                 else if (strcmp(*argv,"-out") == 0)
 129                         {
 130                         if (--argc < 1) goto bad;
 131                         outf= *(++argv);
 132                         }
 133                 else if (strcmp(*argv,"-d") == 0)
 134                         enc=0;
 135                 else if (strcmp(*argv,"-p") == 0)
 136                         printkey=1;
 137                 else if (strcmp(*argv,"-v") == 0)
 138                         verbose=1;
 139                 else if ((strcmp(*argv,"-debug") == 0) ||
 140                          (strcmp(*argv,"-d") == 0))
 141                         debug=1;
 142                 else if (strcmp(*argv,"-P") == 0)
 143                         printkey=2;
 144                 else if (strcmp(*argv,"-A") == 0)
 145                         olb64=1;
 146                 else if (strcmp(*argv,"-a") == 0)
 147                         base64=1;
 148                 else if (strcmp(*argv,"-base64") == 0)
 149                         base64=1;
 150                 else if (strcmp(*argv,"-bufsize") == 0)
 151                         {
 152                         if (--argc < 1) goto bad;
 153                         bufsize=(unsigned char *)*(++argv);
 154                         }
 155                 else if (strcmp(*argv,"-k") == 0)
 156                         {
 157                         if (--argc < 1) goto bad;
 158                         str= *(++argv);
 159                         }
 160                 else if (strcmp(*argv,"-kfile") == 0)
 161                         {
 162                         static char buf[128];
 163                         FILE *infile;
 164                         char *file;
 165
 166                         if (--argc < 1) goto bad;
 167                         file= *(++argv);
 168                         infile=fopen(file,"r");
 169                         if (infile == NULL)
 170                                 {
 171                                 BIO_printf(bio_err,"unable to read key from '%s'\n",
 172                                         file);
 173                                 goto bad;
 174                                 }
 175                         buf[0]='\0';
 176                         fgets(buf,128,infile);
 177                         fclose(infile);
 178                         i=strlen(buf);
 179                         if ((i > 0) &&
 180                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 181                                 buf[--i]='\0';
 182                         if ((i > 0) &&
 183                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 184                                 buf[--i]='\0';
 185                         if (i < 1)
 186                                 {
 187                                 BIO_printf(bio_err,"zero length password\n");
 188                                 goto bad;
 189                                 }
 190                         str=buf;
 191                         }
 192                 else if (strcmp(*argv,"-K") == 0)
 193                         {
 194                         if (--argc < 1) goto bad;
 195                         hkey= *(++argv);
 196                         }
 197                 else if (strcmp(*argv,"-iv") == 0)
 198                         {
 199                         if (--argc < 1) goto bad;
 200                         hiv= *(++argv);
 201                         }
 202                 else if ((argv[0][0] == '-') &&
 203                         ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
 204                         {
 205                         cipher=c;
 206                         }
 207                 else if (strcmp(*argv,"-none") == 0)
 208                         cipher=NULL;
 209                 else
 210                         {
 211                         BIO_printf(bio_err,"unknown option '%s'\n",*argv);
 212 bad:
 213                         BIO_printf(bio_err,"options are\n");
 214                         BIO_printf(bio_err,"%-14s input file\n","-in <file>");
 215                         BIO_printf(bio_err,"%-14s output fileencrypt\n","-out <file>");
 216                         BIO_printf(bio_err,"%-14s encrypt\n","-e");
 217                         BIO_printf(bio_err,"%-14s decrypt\n","-d");
 218                         BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
 219                         BIO_printf(bio_err,"%-14s key is the next argument\n","-k");
 220                         BIO_printf(bio_err,"%-14s key is the first line of the file argument\n","-kfile");
 221                         BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
 222                         BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
 223                         BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
 224
 225                         BIO_printf(bio_err,"Cipher Types\n");
 226                         BIO_printf(bio_err,"des     : 56 bit key DES encryption\n");
 227                         BIO_printf(bio_err,"des_ede :112 bit key ede DES encryption\n");
 228                         BIO_printf(bio_err,"des_ede3:168 bit key ede DES encryption\n");
 229 #ifndef NO_IDEA
 230                         BIO_printf(bio_err,"idea    :128 bit key IDEA encryption\n");
 231 #endif
 232 #ifndef NO_RC4
 233                         BIO_printf(bio_err,"rc2     :128 bit key RC2 encryption\n");
 234 #endif
 235 #ifndef NO_BF
 236                         BIO_printf(bio_err,"bf      :128 bit key BlowFish encryption\n");
 237 #endif
 238 #ifndef NO_RC4
 239                         BIO_printf(bio_err," -%-5s :128 bit key RC4 encryption\n",
 240                                 LN_rc4);
 241 #endif
 242
 243                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 244                                 LN_des_ecb,LN_des_cbc,
 245                                 LN_des_cfb64,LN_des_ofb64);
 246                         BIO_printf(bio_err," -%-4s (%s)\n",
 247                                 "des", LN_des_cbc);
 248
 249                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 250                                 LN_des_ede,LN_des_ede_cbc,
 251                                 LN_des_ede_cfb64,LN_des_ede_ofb64);
 252                         BIO_printf(bio_err," -desx -none\n");
 253
 254
 255                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 256                                 LN_des_ede3,LN_des_ede3_cbc,
 257                                 LN_des_ede3_cfb64,LN_des_ede3_ofb64);
 258                         BIO_printf(bio_err," -%-4s (%s)\n",
 259                                 "des3", LN_des_ede3_cbc);
 260
 261 #ifndef NO_IDEA
 262                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 263                                 LN_idea_ecb, LN_idea_cbc,
 264                                 LN_idea_cfb64, LN_idea_ofb64);
 265                         BIO_printf(bio_err," -%-4s (%s)\n","idea",LN_idea_cbc);
 266 #endif
 267 #ifndef NO_RC2
 268                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 269                                 LN_rc2_ecb, LN_rc2_cbc,
 270                                 LN_rc2_cfb64, LN_rc2_ofb64);
 271                         BIO_printf(bio_err," -%-4s (%s)\n","rc2", LN_rc2_cbc);
 272 #endif
 273 #ifndef NO_BF
 274                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 275                                 LN_bf_ecb, LN_bf_cbc,
 276                                 LN_bf_cfb64, LN_bf_ofb64);
 277                         BIO_printf(bio_err," -%-4s (%s)\n","bf", LN_bf_cbc);
 278 #endif
 279 #ifndef NO_CAST
 280                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 281                                 LN_cast5_ecb, LN_cast5_cbc,
 282                                 LN_cast5_cfb64, LN_cast5_ofb64);
 283                         BIO_printf(bio_err," -%-4s (%s)\n","cast", LN_cast5_cbc);
 284 #endif
 285 #ifndef NO_RC5
 286                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
 287                                 LN_rc5_ecb, LN_rc5_cbc,
 288                                 LN_rc5_cfb64, LN_rc5_ofb64);
 289                         BIO_printf(bio_err," -%-4s (%s)\n","rc5", LN_rc5_cbc);
 290 #endif
 291                         goto end;
 292                         }
 293                 argc--;
 294                 argv++;
 295                 }
 296
 297         if (bufsize != NULL)
 298                 {
 299                 unsigned long n;
 300
 301                 for (n=0; *bufsize; bufsize++)
 302                         {
 303                         i= *bufsize;
 304                         if ((i <= '9') && (i >= '0'))
 305                                 n=n*10+i-'0';
 306                         else if (i == 'k')
 307                                 {
 308                                 n*=1024;
 309                                 bufsize++;
 310                                 break;
 311                                 }
 312                         }
 313                 if (*bufsize != '\0')
 314                         {
 315                         BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
 316                         goto end;
 317                         }
 318
 319                 /* It must be large enough for a base64 encoded line */
 320                 if (n < 80) n=80;
 321
 322                 bsize=(int)n;
 323                 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
 324                 }
 325
 326         strbuf=Malloc(SIZE);
 327         buff=(unsigned char *)Malloc(EVP_ENCODE_LENGTH(bsize));
 328         if ((buff == NULL) || (strbuf == NULL))
 329                 {
 330                 BIO_printf(bio_err,"Malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
 331                 goto end;
 332                 }
 333
 334         in=BIO_new(BIO_s_file());
 335         out=BIO_new(BIO_s_file());
 336         if ((in == NULL) || (out == NULL))
 337                 {
 338                 ERR_print_errors(bio_err);
 339                 goto end;
 340                 }
 341         if (debug)
 342                 {
 343                 BIO_set_callback(in,BIO_debug_callback);
 344                 BIO_set_callback(out,BIO_debug_callback);
 345                 BIO_set_callback_arg(in,bio_err);
 346                 BIO_set_callback_arg(out,bio_err);
 347                 }
 348
 349         if (inf == NULL)
 350                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 351         else
 352                 {
 353                 if (BIO_read_filename(in,inf) <= 0)
 354                         {
 355                         perror(inf);
 356                         goto end;
 357                         }
 358                 }
 359
 360         if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
 361                 {
 362                 for (;;)
 363                         {
 364                         char buf[200];
 365
 366                         sprintf(buf,"enter %s %s password:",
 367                                 OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
 368                                 (enc)?"encryption":"decryption");
 369                         strbuf[0]='\0';
 370                         i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
 371                         if (i == 0)
 372                                 {
 373                                 if (strbuf[0] == '\0')
 374                                         {
 375                                         ret=1;
 376                                         goto end;
 377                                         }
 378                                 str=strbuf;
 379                                 break;
 380                                 }
 381                         if (i < 0)
 382                                 {
 383                                 BIO_printf(bio_err,"bad password read\n");
 384                                 goto end;
 385                                 }
 386                         }
 387                 }
 388
 389         if (cipher != NULL)
 390                 {
 391                 if (str != NULL)
 392                         {
 393                         EVP_BytesToKey(cipher,EVP_md5(),NULL,
 394                                 (unsigned char *)str,
 395                                 strlen(str),1,key,iv);
 396                         /* zero the complete buffer or the string
 397                          * passed from the command line
 398                          * bug picked up by
 399                          * Larry J. Hughes Jr. <hughes@indiana.edu> */
 400                         if (str == strbuf)
 401                                 memset(str,0,SIZE);
 402                         else
 403                                 memset(str,0,strlen(str));
 404                         }
 405                 if ((hiv != NULL) && !set_hex(hiv,iv,8))
 406                         {
 407                         BIO_printf(bio_err,"invalid hex iv value\n");
 408                         goto end;
 409                         }
 410                 if ((hkey != NULL) && !set_hex(hkey,key,24))
 411                         {
 412                         BIO_printf(bio_err,"invalid hex key value\n");
 413                         goto end;
 414                         }
 415
 416                 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
 417                         goto end;
 418                 BIO_set_cipher(benc,cipher,key,iv,enc);
 419                 if (debug)
 420                         {
 421                         BIO_set_callback(benc,BIO_debug_callback);
 422                         BIO_set_callback_arg(benc,bio_err);
 423                         }
 424
 425                 if (printkey)
 426                         {
 427                         if (cipher->key_len > 0)
 428                                 {
 429                                 printf("key=");
 430                                 for (i=0; i<cipher->key_len; i++)
 431                                         printf("%02X",key[i]);
 432                                 printf("\n");
 433                                 }
 434                         if (cipher->iv_len > 0)
 435                                 {
 436                                 printf("iv =");
 437                                 for (i=0; i<cipher->iv_len; i++)
 438                                         printf("%02X",iv[i]);
 439                                 printf("\n");
 440                                 }
 441                         if (printkey == 2)
 442                                 {
 443                                 ret=0;
 444                                 goto end;
 445                                 }
 446                         }
 447                 }
 448
 449
 450         if (outf == NULL)
 451                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 452         else
 453                 {
 454                 if (BIO_write_filename(out,outf) <= 0)
 455                         {
 456                         perror(outf);
 457                         goto end;
 458                         }
 459                 }
 460
 461         rbio=in;
 462         wbio=out;
 463
 464         if (base64)
 465                 {
 466                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
 467                         goto end;
 468                 if (debug)
 469                         {
 470                         BIO_set_callback(b64,BIO_debug_callback);
 471                         BIO_set_callback_arg(b64,bio_err);
 472                         }
 473                 if (olb64)
 474                         BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
 475                 if (enc)
 476                         wbio=BIO_push(b64,wbio);
 477                 else
 478                         rbio=BIO_push(b64,rbio);
 479                 }
 480
 481         /* Only encrypt/decrypt as we write the file */
 482         if (benc != NULL)
 483                 wbio=BIO_push(benc,wbio);
 484
 485         for (;;)
 486                 {
 487                 inl=BIO_read(rbio,(char *)buff,bsize);
 488                 if (inl <= 0) break;
 489                 if (BIO_write(wbio,(char *)buff,inl) != inl)
 490                         {
 491                         BIO_printf(bio_err,"error writing output file\n");
 492                         goto end;
 493                         }
 494                 }
 495         if (!BIO_flush(wbio))
 496                 {
 497                 BIO_printf(bio_err,"bad decrypt\n");
 498                 goto end;
 499                 }
 500
 501         ret=0;
 502         if (verbose)
 503                 {
 504                 BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
 505                 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
 506                 }
 507 end:
 508         if (strbuf != NULL) Free(strbuf);
 509         if (buff != NULL) Free(buff);
 510         if (in != NULL) BIO_free(in);
 511         if (out != NULL) BIO_free(out);
 512         if (benc != NULL) BIO_free(benc);
 513         if (b64 != NULL) BIO_free(b64);
 514         EXIT(ret);
 515         }
 516
 517 int set_hex(char *in, unsigned char *out, int size)
 518         {
 519         int i,n;
 520         unsigned char j;
 521
 522         n=strlen(in);
 523         if (n > (size*2))
 524                 {
 525                 BIO_printf(bio_err,"hex string is too long\n");
 526                 return(0);
 527                 }
 528         memset(out,0,size);
 529         for (i=0; i<n; i++)
 530                 {
 531                 j=(unsigned char)*in;
 532                 *(in++)='\0';
 533                 if (j == 0) break;
 534                 if ((j >= '0') && (j <= '9'))
 535                         j-='0';
 536                 else if ((j >= 'A') && (j <= 'F'))
 537                         j=j-'A'+10;
 538                 else if ((j >= 'a') && (j <= 'f'))
 539                         j=j-'a'+10;
 540                 else
 541                         {
 542                         BIO_printf(bio_err,"non-hex digit\n");
 543                         return(0);
 544                         }
 545                 if (i&1)
 546                         out[i/2]|=j;
 547                 else
 548                         out[i/2]=(j<<4);
 549                 }
 550         return(1);
 551         }