enc.c revision bdfb8ad83da0647e9b9a32792598e8ce7ba3ef4d
1/* apps/enc.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59#include <stdio.h> 60#include <stdlib.h> 61#include <string.h> 62#include "apps.h" 63#include <openssl/bio.h> 64#include <openssl/err.h> 65#include <openssl/evp.h> 66#include <openssl/objects.h> 67#include <openssl/x509.h> 68#include <openssl/rand.h> 69#include <openssl/pem.h> 70#include <ctype.h> 71 72int set_hex(char *in,unsigned char *out,int size); 73#undef SIZE 74#undef BSIZE 75#undef PROG 76 77#define SIZE (512) 78#define BSIZE (8*1024) 79#define PROG enc_main 80 81static void show_ciphers(const OBJ_NAME *name,void *bio_) 82 { 83 BIO *bio=bio_; 84 static int n; 85 86 if(!islower((unsigned char)*name->name)) 87 return; 88 89 BIO_printf(bio,"-%-25s",name->name); 90 if(++n == 3) 91 { 92 BIO_printf(bio,"\n"); 93 n=0; 94 } 95 else 96 BIO_printf(bio," "); 97 } 98 99int MAIN(int, char **); 100 101int MAIN(int argc, char **argv) 102 { 103#ifndef OPENSSL_NO_ENGINE 104 ENGINE *e = NULL; 105#endif 106 static const char magic[]="Salted__"; 107 char mbuf[sizeof magic-1]; 108 char *strbuf=NULL; 109 unsigned char *buff=NULL,*bufsize=NULL; 110 int bsize=BSIZE,verbose=0; 111 int ret=1,inl; 112 int nopad = 0; 113 unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH]; 114 unsigned char salt[PKCS5_SALT_LEN]; 115 char *str=NULL, *passarg = NULL, *pass = NULL; 116 char *hkey=NULL,*hiv=NULL,*hsalt = NULL; 117 char *md=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 EVP_CIPHER_CTX *ctx = NULL; 122 char *inf=NULL,*outf=NULL; 123 BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL; 124#define PROG_NAME_SIZE 39 125 char pname[PROG_NAME_SIZE+1]; 126#ifndef OPENSSL_NO_ENGINE 127 char *engine = NULL; 128#endif 129 const EVP_MD *dgst=NULL; 130 131 apps_startup(); 132 133 if (bio_err == NULL) 134 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 135 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 136 137 if (!load_config(bio_err, NULL)) 138 goto end; 139 140 /* first check the program name */ 141 program_name(argv[0],pname,sizeof pname); 142 if (strcmp(pname,"base64") == 0) 143 base64=1; 144 145 cipher=EVP_get_cipherbyname(pname); 146 if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0)) 147 { 148 BIO_printf(bio_err,"%s is an unknown cipher\n",pname); 149 goto bad; 150 } 151 152 argc--; 153 argv++; 154 while (argc >= 1) 155 { 156 if (strcmp(*argv,"-e") == 0) 157 enc=1; 158 else if (strcmp(*argv,"-in") == 0) 159 { 160 if (--argc < 1) goto bad; 161 inf= *(++argv); 162 } 163 else if (strcmp(*argv,"-out") == 0) 164 { 165 if (--argc < 1) goto bad; 166 outf= *(++argv); 167 } 168 else if (strcmp(*argv,"-pass") == 0) 169 { 170 if (--argc < 1) goto bad; 171 passarg= *(++argv); 172 } 173#ifndef OPENSSL_NO_ENGINE 174 else if (strcmp(*argv,"-engine") == 0) 175 { 176 if (--argc < 1) goto bad; 177 engine= *(++argv); 178 } 179#endif 180 else if (strcmp(*argv,"-d") == 0) 181 enc=0; 182 else if (strcmp(*argv,"-p") == 0) 183 printkey=1; 184 else if (strcmp(*argv,"-v") == 0) 185 verbose=1; 186 else if (strcmp(*argv,"-nopad") == 0) 187 nopad=1; 188 else if (strcmp(*argv,"-salt") == 0) 189 nosalt=0; 190 else if (strcmp(*argv,"-nosalt") == 0) 191 nosalt=1; 192 else if (strcmp(*argv,"-debug") == 0) 193 debug=1; 194 else if (strcmp(*argv,"-P") == 0) 195 printkey=2; 196 else if (strcmp(*argv,"-A") == 0) 197 olb64=1; 198 else if (strcmp(*argv,"-a") == 0) 199 base64=1; 200 else if (strcmp(*argv,"-base64") == 0) 201 base64=1; 202 else if (strcmp(*argv,"-bufsize") == 0) 203 { 204 if (--argc < 1) goto bad; 205 bufsize=(unsigned char *)*(++argv); 206 } 207 else if (strcmp(*argv,"-k") == 0) 208 { 209 if (--argc < 1) goto bad; 210 str= *(++argv); 211 } 212 else if (strcmp(*argv,"-kfile") == 0) 213 { 214 static char buf[128]; 215 FILE *infile; 216 char *file; 217 218 if (--argc < 1) goto bad; 219 file= *(++argv); 220 infile=fopen(file,"r"); 221 if (infile == NULL) 222 { 223 BIO_printf(bio_err,"unable to read key from '%s'\n", 224 file); 225 goto bad; 226 } 227 buf[0]='\0'; 228 fgets(buf,sizeof buf,infile); 229 fclose(infile); 230 i=strlen(buf); 231 if ((i > 0) && 232 ((buf[i-1] == '\n') || (buf[i-1] == '\r'))) 233 buf[--i]='\0'; 234 if ((i > 0) && 235 ((buf[i-1] == '\n') || (buf[i-1] == '\r'))) 236 buf[--i]='\0'; 237 if (i < 1) 238 { 239 BIO_printf(bio_err,"zero length password\n"); 240 goto bad; 241 } 242 str=buf; 243 } 244 else if (strcmp(*argv,"-K") == 0) 245 { 246 if (--argc < 1) goto bad; 247 hkey= *(++argv); 248 } 249 else if (strcmp(*argv,"-S") == 0) 250 { 251 if (--argc < 1) goto bad; 252 hsalt= *(++argv); 253 } 254 else if (strcmp(*argv,"-iv") == 0) 255 { 256 if (--argc < 1) goto bad; 257 hiv= *(++argv); 258 } 259 else if (strcmp(*argv,"-md") == 0) 260 { 261 if (--argc < 1) goto bad; 262 md= *(++argv); 263 } 264 else if ((argv[0][0] == '-') && 265 ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL)) 266 { 267 cipher=c; 268 } 269 else if (strcmp(*argv,"-none") == 0) 270 cipher=NULL; 271 else 272 { 273 BIO_printf(bio_err,"unknown option '%s'\n",*argv); 274bad: 275 BIO_printf(bio_err,"options are\n"); 276 BIO_printf(bio_err,"%-14s input file\n","-in <file>"); 277 BIO_printf(bio_err,"%-14s output file\n","-out <file>"); 278 BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>"); 279 BIO_printf(bio_err,"%-14s encrypt\n","-e"); 280 BIO_printf(bio_err,"%-14s decrypt\n","-d"); 281 BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64"); 282 BIO_printf(bio_err,"%-14s passphrase is the next argument\n","-k"); 283 BIO_printf(bio_err,"%-14s passphrase is the first line of the file argument\n","-kfile"); 284 BIO_printf(bio_err,"%-14s the next argument is the md to use to create a key\n","-md"); 285 BIO_printf(bio_err,"%-14s from a passphrase. One of md2, md5, sha or sha1\n",""); 286 BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv"); 287 BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]"); 288 BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>"); 289#ifndef OPENSSL_NO_ENGINE 290 BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e"); 291#endif 292 293 BIO_printf(bio_err,"Cipher Types\n"); 294 OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, 295 show_ciphers, 296 bio_err); 297 BIO_printf(bio_err,"\n"); 298 299 goto end; 300 } 301 argc--; 302 argv++; 303 } 304 305#ifndef OPENSSL_NO_ENGINE 306 e = setup_engine(bio_err, engine, 0); 307#endif 308 309 if (md && (dgst=EVP_get_digestbyname(md)) == NULL) 310 { 311 BIO_printf(bio_err,"%s is an unsupported message digest type\n",md); 312 goto end; 313 } 314 315 if (dgst == NULL) 316 { 317 dgst = EVP_md5(); 318 } 319 320 if (bufsize != NULL) 321 { 322 unsigned long n; 323 324 for (n=0; *bufsize; bufsize++) 325 { 326 i= *bufsize; 327 if ((i <= '9') && (i >= '0')) 328 n=n*10+i-'0'; 329 else if (i == 'k') 330 { 331 n*=1024; 332 bufsize++; 333 break; 334 } 335 } 336 if (*bufsize != '\0') 337 { 338 BIO_printf(bio_err,"invalid 'bufsize' specified.\n"); 339 goto end; 340 } 341 342 /* It must be large enough for a base64 encoded line */ 343 if (base64 && n < 80) n=80; 344 345 bsize=(int)n; 346 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize); 347 } 348 349 strbuf=OPENSSL_malloc(SIZE); 350 buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize)); 351 if ((buff == NULL) || (strbuf == NULL)) 352 { 353 BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize)); 354 goto end; 355 } 356 357 in=BIO_new(BIO_s_file()); 358 out=BIO_new(BIO_s_file()); 359 if ((in == NULL) || (out == NULL)) 360 { 361 ERR_print_errors(bio_err); 362 goto end; 363 } 364 if (debug) 365 { 366 BIO_set_callback(in,BIO_debug_callback); 367 BIO_set_callback(out,BIO_debug_callback); 368 BIO_set_callback_arg(in,(char *)bio_err); 369 BIO_set_callback_arg(out,(char *)bio_err); 370 } 371 372 if (inf == NULL) 373 { 374 if (bufsize != NULL) 375 setvbuf(stdin, (char *)NULL, _IONBF, 0); 376 BIO_set_fp(in,stdin,BIO_NOCLOSE); 377 } 378 else 379 { 380 if (BIO_read_filename(in,inf) <= 0) 381 { 382 perror(inf); 383 goto end; 384 } 385 } 386 387 if(!str && passarg) { 388 if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) { 389 BIO_printf(bio_err, "Error getting password\n"); 390 goto end; 391 } 392 str = pass; 393 } 394 395 if ((str == NULL) && (cipher != NULL) && (hkey == NULL)) 396 { 397 for (;;) 398 { 399 char buf[200]; 400 401 BIO_snprintf(buf,sizeof buf,"enter %s %s password:", 402 OBJ_nid2ln(EVP_CIPHER_nid(cipher)), 403 (enc)?"encryption":"decryption"); 404 strbuf[0]='\0'; 405 i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc); 406 if (i == 0) 407 { 408 if (strbuf[0] == '\0') 409 { 410 ret=1; 411 goto end; 412 } 413 str=strbuf; 414 break; 415 } 416 if (i < 0) 417 { 418 BIO_printf(bio_err,"bad password read\n"); 419 goto end; 420 } 421 } 422 } 423 424 425 if (outf == NULL) 426 { 427 BIO_set_fp(out,stdout,BIO_NOCLOSE); 428 if (bufsize != NULL) 429 setvbuf(stdout, (char *)NULL, _IONBF, 0); 430#ifdef OPENSSL_SYS_VMS 431 { 432 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 433 out = BIO_push(tmpbio, out); 434 } 435#endif 436 } 437 else 438 { 439 if (BIO_write_filename(out,outf) <= 0) 440 { 441 perror(outf); 442 goto end; 443 } 444 } 445 446 rbio=in; 447 wbio=out; 448 449 if (base64) 450 { 451 if ((b64=BIO_new(BIO_f_base64())) == NULL) 452 goto end; 453 if (debug) 454 { 455 BIO_set_callback(b64,BIO_debug_callback); 456 BIO_set_callback_arg(b64,(char *)bio_err); 457 } 458 if (olb64) 459 BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL); 460 if (enc) 461 wbio=BIO_push(b64,wbio); 462 else 463 rbio=BIO_push(b64,rbio); 464 } 465 466 if (cipher != NULL) 467 { 468 /* Note that str is NULL if a key was passed on the command 469 * line, so we get no salt in that case. Is this a bug? 470 */ 471 if (str != NULL) 472 { 473 /* Salt handling: if encrypting generate a salt and 474 * write to output BIO. If decrypting read salt from 475 * input BIO. 476 */ 477 unsigned char *sptr; 478 if(nosalt) sptr = NULL; 479 else { 480 if(enc) { 481 if(hsalt) { 482 if(!set_hex(hsalt,salt,sizeof salt)) { 483 BIO_printf(bio_err, 484 "invalid hex salt value\n"); 485 goto end; 486 } 487 } else if (RAND_pseudo_bytes(salt, sizeof salt) < 0) 488 goto end; 489 /* If -P option then don't bother writing */ 490 if((printkey != 2) 491 && (BIO_write(wbio,magic, 492 sizeof magic-1) != sizeof magic-1 493 || BIO_write(wbio, 494 (char *)salt, 495 sizeof salt) != sizeof salt)) { 496 BIO_printf(bio_err,"error writing output file\n"); 497 goto end; 498 } 499 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf 500 || BIO_read(rbio, 501 (unsigned char *)salt, 502 sizeof salt) != sizeof salt) { 503 BIO_printf(bio_err,"error reading input file\n"); 504 goto end; 505 } else if(memcmp(mbuf,magic,sizeof magic-1)) { 506 BIO_printf(bio_err,"bad magic number\n"); 507 goto end; 508 } 509 510 sptr = salt; 511 } 512 513 EVP_BytesToKey(cipher,dgst,sptr, 514 (unsigned char *)str, 515 strlen(str),1,key,iv); 516 /* zero the complete buffer or the string 517 * passed from the command line 518 * bug picked up by 519 * Larry J. Hughes Jr. <hughes@indiana.edu> */ 520 if (str == strbuf) 521 OPENSSL_cleanse(str,SIZE); 522 else 523 OPENSSL_cleanse(str,strlen(str)); 524 } 525 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv)) 526 { 527 BIO_printf(bio_err,"invalid hex iv value\n"); 528 goto end; 529 } 530 if ((hiv == NULL) && (str == NULL)) 531 { 532 /* No IV was explicitly set and no IV was generated 533 * during EVP_BytesToKey. Hence the IV is undefined, 534 * making correct decryption impossible. */ 535 BIO_printf(bio_err, "iv undefined\n"); 536 goto end; 537 } 538 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key)) 539 { 540 BIO_printf(bio_err,"invalid hex key value\n"); 541 goto end; 542 } 543 544 if ((benc=BIO_new(BIO_f_cipher())) == NULL) 545 goto end; 546 547 /* Since we may be changing parameters work on the encryption 548 * context rather than calling BIO_set_cipher(). 549 */ 550 551 BIO_get_cipher_ctx(benc, &ctx); 552 if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc)) 553 { 554 BIO_printf(bio_err, "Error setting cipher %s\n", 555 EVP_CIPHER_name(cipher)); 556 ERR_print_errors(bio_err); 557 goto end; 558 } 559 560 if (nopad) 561 EVP_CIPHER_CTX_set_padding(ctx, 0); 562 563 if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc)) 564 { 565 BIO_printf(bio_err, "Error setting cipher %s\n", 566 EVP_CIPHER_name(cipher)); 567 ERR_print_errors(bio_err); 568 goto end; 569 } 570 571 if (debug) 572 { 573 BIO_set_callback(benc,BIO_debug_callback); 574 BIO_set_callback_arg(benc,(char *)bio_err); 575 } 576 577 if (printkey) 578 { 579 if (!nosalt) 580 { 581 printf("salt="); 582 for (i=0; i<(int)sizeof(salt); i++) 583 printf("%02X",salt[i]); 584 printf("\n"); 585 } 586 if (cipher->key_len > 0) 587 { 588 printf("key="); 589 for (i=0; i<cipher->key_len; i++) 590 printf("%02X",key[i]); 591 printf("\n"); 592 } 593 if (cipher->iv_len > 0) 594 { 595 printf("iv ="); 596 for (i=0; i<cipher->iv_len; i++) 597 printf("%02X",iv[i]); 598 printf("\n"); 599 } 600 if (printkey == 2) 601 { 602 ret=0; 603 goto end; 604 } 605 } 606 } 607 608 /* Only encrypt/decrypt as we write the file */ 609 if (benc != NULL) 610 wbio=BIO_push(benc,wbio); 611 612 for (;;) 613 { 614 inl=BIO_read(rbio,(char *)buff,bsize); 615 if (inl <= 0) break; 616 if (BIO_write(wbio,(char *)buff,inl) != inl) 617 { 618 BIO_printf(bio_err,"error writing output file\n"); 619 goto end; 620 } 621 } 622 if (!BIO_flush(wbio)) 623 { 624 BIO_printf(bio_err,"bad decrypt\n"); 625 goto end; 626 } 627 628 ret=0; 629 if (verbose) 630 { 631 BIO_printf(bio_err,"bytes read :%8ld\n",BIO_number_read(in)); 632 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out)); 633 } 634end: 635 ERR_print_errors(bio_err); 636 if (strbuf != NULL) OPENSSL_free(strbuf); 637 if (buff != NULL) OPENSSL_free(buff); 638 if (in != NULL) BIO_free(in); 639 if (out != NULL) BIO_free_all(out); 640 if (benc != NULL) BIO_free(benc); 641 if (b64 != NULL) BIO_free(b64); 642 if(pass) OPENSSL_free(pass); 643 apps_shutdown(); 644 OPENSSL_EXIT(ret); 645 } 646 647int set_hex(char *in, unsigned char *out, int size) 648 { 649 int i,n; 650 unsigned char j; 651 652 n=strlen(in); 653 if (n > (size*2)) 654 { 655 BIO_printf(bio_err,"hex string is too long\n"); 656 return(0); 657 } 658 memset(out,0,size); 659 for (i=0; i<n; i++) 660 { 661 j=(unsigned char)*in; 662 *(in++)='\0'; 663 if (j == 0) break; 664 if ((j >= '0') && (j <= '9')) 665 j-='0'; 666 else if ((j >= 'A') && (j <= 'F')) 667 j=j-'A'+10; 668 else if ((j >= 'a') && (j <= 'f')) 669 j=j-'a'+10; 670 else 671 { 672 BIO_printf(bio_err,"non-hex digit\n"); 673 return(0); 674 } 675 if (i&1) 676 out[i/2]|=j; 677 else 678 out[i/2]=(j<<4); 679 } 680 return(1); 681 } 682