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 72 int 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 81 static 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 99 int MAIN(int, char **); 100 101 int 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 int non_fips_allow = 0; 131 132 apps_startup(); 133 134 if (bio_err == NULL) 135 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 136 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 137 138 if (!load_config(bio_err, NULL)) 139 goto end; 140 141 /* first check the program name */ 142 program_name(argv[0],pname,sizeof pname); 143 if (strcmp(pname,"base64") == 0) 144 base64=1; 145 146 cipher=EVP_get_cipherbyname(pname); 147 if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0)) 148 { 149 BIO_printf(bio_err,"%s is an unknown cipher\n",pname); 150 goto bad; 151 } 152 153 argc--; 154 argv++; 155 while (argc >= 1) 156 { 157 if (strcmp(*argv,"-e") == 0) 158 enc=1; 159 else if (strcmp(*argv,"-in") == 0) 160 { 161 if (--argc < 1) goto bad; 162 inf= *(++argv); 163 } 164 else if (strcmp(*argv,"-out") == 0) 165 { 166 if (--argc < 1) goto bad; 167 outf= *(++argv); 168 } 169 else if (strcmp(*argv,"-pass") == 0) 170 { 171 if (--argc < 1) goto bad; 172 passarg= *(++argv); 173 } 174 #ifndef OPENSSL_NO_ENGINE 175 else if (strcmp(*argv,"-engine") == 0) 176 { 177 if (--argc < 1) goto bad; 178 engine= *(++argv); 179 } 180 #endif 181 else if (strcmp(*argv,"-d") == 0) 182 enc=0; 183 else if (strcmp(*argv,"-p") == 0) 184 printkey=1; 185 else if (strcmp(*argv,"-v") == 0) 186 verbose=1; 187 else if (strcmp(*argv,"-nopad") == 0) 188 nopad=1; 189 else if (strcmp(*argv,"-salt") == 0) 190 nosalt=0; 191 else if (strcmp(*argv,"-nosalt") == 0) 192 nosalt=1; 193 else if (strcmp(*argv,"-debug") == 0) 194 debug=1; 195 else if (strcmp(*argv,"-P") == 0) 196 printkey=2; 197 else if (strcmp(*argv,"-A") == 0) 198 olb64=1; 199 else if (strcmp(*argv,"-a") == 0) 200 base64=1; 201 else if (strcmp(*argv,"-base64") == 0) 202 base64=1; 203 else if (strcmp(*argv,"-bufsize") == 0) 204 { 205 if (--argc < 1) goto bad; 206 bufsize=(unsigned char *)*(++argv); 207 } 208 else if (strcmp(*argv,"-k") == 0) 209 { 210 if (--argc < 1) goto bad; 211 str= *(++argv); 212 } 213 else if (strcmp(*argv,"-kfile") == 0) 214 { 215 static char buf[128]; 216 FILE *infile; 217 char *file; 218 219 if (--argc < 1) goto bad; 220 file= *(++argv); 221 infile=fopen(file,"r"); 222 if (infile == NULL) 223 { 224 BIO_printf(bio_err,"unable to read key from '%s'\n", 225 file); 226 goto bad; 227 } 228 buf[0]='\0'; 229 if (!fgets(buf,sizeof buf,infile)) 230 { 231 BIO_printf(bio_err,"unable to read key from '%s'\n", 232 file); 233 goto bad; 234 } 235 fclose(infile); 236 i=strlen(buf); 237 if ((i > 0) && 238 ((buf[i-1] == '\n') || (buf[i-1] == '\r'))) 239 buf[--i]='\0'; 240 if ((i > 0) && 241 ((buf[i-1] == '\n') || (buf[i-1] == '\r'))) 242 buf[--i]='\0'; 243 if (i < 1) 244 { 245 BIO_printf(bio_err,"zero length password\n"); 246 goto bad; 247 } 248 str=buf; 249 } 250 else if (strcmp(*argv,"-K") == 0) 251 { 252 if (--argc < 1) goto bad; 253 hkey= *(++argv); 254 } 255 else if (strcmp(*argv,"-S") == 0) 256 { 257 if (--argc < 1) goto bad; 258 hsalt= *(++argv); 259 } 260 else if (strcmp(*argv,"-iv") == 0) 261 { 262 if (--argc < 1) goto bad; 263 hiv= *(++argv); 264 } 265 else if (strcmp(*argv,"-md") == 0) 266 { 267 if (--argc < 1) goto bad; 268 md= *(++argv); 269 } 270 else if (strcmp(*argv,"-non-fips-allow") == 0) 271 non_fips_allow = 1; 272 else if ((argv[0][0] == '-') && 273 ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL)) 274 { 275 cipher=c; 276 } 277 else if (strcmp(*argv,"-none") == 0) 278 cipher=NULL; 279 else 280 { 281 BIO_printf(bio_err,"unknown option '%s'\n",*argv); 282 bad: 283 BIO_printf(bio_err,"options are\n"); 284 BIO_printf(bio_err,"%-14s input file\n","-in <file>"); 285 BIO_printf(bio_err,"%-14s output file\n","-out <file>"); 286 BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>"); 287 BIO_printf(bio_err,"%-14s encrypt\n","-e"); 288 BIO_printf(bio_err,"%-14s decrypt\n","-d"); 289 BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64"); 290 BIO_printf(bio_err,"%-14s passphrase is the next argument\n","-k"); 291 BIO_printf(bio_err,"%-14s passphrase is the first line of the file argument\n","-kfile"); 292 BIO_printf(bio_err,"%-14s the next argument is the md to use to create a key\n","-md"); 293 BIO_printf(bio_err,"%-14s from a passphrase. One of md2, md5, sha or sha1\n",""); 294 BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv"); 295 BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]"); 296 BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>"); 297 #ifndef OPENSSL_NO_ENGINE 298 BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e"); 299 #endif 300 301 BIO_printf(bio_err,"Cipher Types\n"); 302 OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, 303 show_ciphers, 304 bio_err); 305 BIO_printf(bio_err,"\n"); 306 307 goto end; 308 } 309 argc--; 310 argv++; 311 } 312 313 #ifndef OPENSSL_NO_ENGINE 314 e = setup_engine(bio_err, engine, 0); 315 #endif 316 317 if (md && (dgst=EVP_get_digestbyname(md)) == NULL) 318 { 319 BIO_printf(bio_err,"%s is an unsupported message digest type\n",md); 320 goto end; 321 } 322 323 if (dgst == NULL) 324 { 325 if (in_FIPS_mode) 326 dgst = EVP_sha1(); 327 else 328 dgst = EVP_md5(); 329 } 330 331 if (bufsize != NULL) 332 { 333 unsigned long n; 334 335 for (n=0; *bufsize; bufsize++) 336 { 337 i= *bufsize; 338 if ((i <= '9') && (i >= '0')) 339 n=n*10+i-'0'; 340 else if (i == 'k') 341 { 342 n*=1024; 343 bufsize++; 344 break; 345 } 346 } 347 if (*bufsize != '\0') 348 { 349 BIO_printf(bio_err,"invalid 'bufsize' specified.\n"); 350 goto end; 351 } 352 353 /* It must be large enough for a base64 encoded line */ 354 if (base64 && n < 80) n=80; 355 356 bsize=(int)n; 357 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize); 358 } 359 360 strbuf=OPENSSL_malloc(SIZE); 361 buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize)); 362 if ((buff == NULL) || (strbuf == NULL)) 363 { 364 BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize)); 365 goto end; 366 } 367 368 in=BIO_new(BIO_s_file()); 369 out=BIO_new(BIO_s_file()); 370 if ((in == NULL) || (out == NULL)) 371 { 372 ERR_print_errors(bio_err); 373 goto end; 374 } 375 if (debug) 376 { 377 BIO_set_callback(in,BIO_debug_callback); 378 BIO_set_callback(out,BIO_debug_callback); 379 BIO_set_callback_arg(in,(char *)bio_err); 380 BIO_set_callback_arg(out,(char *)bio_err); 381 } 382 383 if (inf == NULL) 384 { 385 if (bufsize != NULL) 386 setvbuf(stdin, (char *)NULL, _IONBF, 0); 387 BIO_set_fp(in,stdin,BIO_NOCLOSE); 388 } 389 else 390 { 391 if (BIO_read_filename(in,inf) <= 0) 392 { 393 perror(inf); 394 goto end; 395 } 396 } 397 398 if(!str && passarg) { 399 if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) { 400 BIO_printf(bio_err, "Error getting password\n"); 401 goto end; 402 } 403 str = pass; 404 } 405 406 if ((str == NULL) && (cipher != NULL) && (hkey == NULL)) 407 { 408 for (;;) 409 { 410 char buf[200]; 411 412 BIO_snprintf(buf,sizeof buf,"enter %s %s password:", 413 OBJ_nid2ln(EVP_CIPHER_nid(cipher)), 414 (enc)?"encryption":"decryption"); 415 strbuf[0]='\0'; 416 i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc); 417 if (i == 0) 418 { 419 if (strbuf[0] == '\0') 420 { 421 ret=1; 422 goto end; 423 } 424 str=strbuf; 425 break; 426 } 427 if (i < 0) 428 { 429 BIO_printf(bio_err,"bad password read\n"); 430 goto end; 431 } 432 } 433 } 434 435 436 if (outf == NULL) 437 { 438 BIO_set_fp(out,stdout,BIO_NOCLOSE); 439 if (bufsize != NULL) 440 setvbuf(stdout, (char *)NULL, _IONBF, 0); 441 #ifdef OPENSSL_SYS_VMS 442 { 443 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 444 out = BIO_push(tmpbio, out); 445 } 446 #endif 447 } 448 else 449 { 450 if (BIO_write_filename(out,outf) <= 0) 451 { 452 perror(outf); 453 goto end; 454 } 455 } 456 457 rbio=in; 458 wbio=out; 459 460 if (base64) 461 { 462 if ((b64=BIO_new(BIO_f_base64())) == NULL) 463 goto end; 464 if (debug) 465 { 466 BIO_set_callback(b64,BIO_debug_callback); 467 BIO_set_callback_arg(b64,(char *)bio_err); 468 } 469 if (olb64) 470 BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL); 471 if (enc) 472 wbio=BIO_push(b64,wbio); 473 else 474 rbio=BIO_push(b64,rbio); 475 } 476 477 if (cipher != NULL) 478 { 479 /* Note that str is NULL if a key was passed on the command 480 * line, so we get no salt in that case. Is this a bug? 481 */ 482 if (str != NULL) 483 { 484 /* Salt handling: if encrypting generate a salt and 485 * write to output BIO. If decrypting read salt from 486 * input BIO. 487 */ 488 unsigned char *sptr; 489 if(nosalt) sptr = NULL; 490 else { 491 if(enc) { 492 if(hsalt) { 493 if(!set_hex(hsalt,salt,sizeof salt)) { 494 BIO_printf(bio_err, 495 "invalid hex salt value\n"); 496 goto end; 497 } 498 } else if (RAND_pseudo_bytes(salt, sizeof salt) < 0) 499 goto end; 500 /* If -P option then don't bother writing */ 501 if((printkey != 2) 502 && (BIO_write(wbio,magic, 503 sizeof magic-1) != sizeof magic-1 504 || BIO_write(wbio, 505 (char *)salt, 506 sizeof salt) != sizeof salt)) { 507 BIO_printf(bio_err,"error writing output file\n"); 508 goto end; 509 } 510 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf 511 || BIO_read(rbio, 512 (unsigned char *)salt, 513 sizeof salt) != sizeof salt) { 514 BIO_printf(bio_err,"error reading input file\n"); 515 goto end; 516 } else if(memcmp(mbuf,magic,sizeof magic-1)) { 517 BIO_printf(bio_err,"bad magic number\n"); 518 goto end; 519 } 520 521 sptr = salt; 522 } 523 524 EVP_BytesToKey(cipher,dgst,sptr, 525 (unsigned char *)str, 526 strlen(str),1,key,iv); 527 /* zero the complete buffer or the string 528 * passed from the command line 529 * bug picked up by 530 * Larry J. Hughes Jr. <hughes@indiana.edu> */ 531 if (str == strbuf) 532 OPENSSL_cleanse(str,SIZE); 533 else 534 OPENSSL_cleanse(str,strlen(str)); 535 } 536 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv)) 537 { 538 BIO_printf(bio_err,"invalid hex iv value\n"); 539 goto end; 540 } 541 if ((hiv == NULL) && (str == NULL) 542 && EVP_CIPHER_iv_length(cipher) != 0) 543 { 544 /* No IV was explicitly set and no IV was generated 545 * during EVP_BytesToKey. Hence the IV is undefined, 546 * making correct decryption impossible. */ 547 BIO_printf(bio_err, "iv undefined\n"); 548 goto end; 549 } 550 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key)) 551 { 552 BIO_printf(bio_err,"invalid hex key value\n"); 553 goto end; 554 } 555 556 if ((benc=BIO_new(BIO_f_cipher())) == NULL) 557 goto end; 558 559 /* Since we may be changing parameters work on the encryption 560 * context rather than calling BIO_set_cipher(). 561 */ 562 563 BIO_get_cipher_ctx(benc, &ctx); 564 565 if (non_fips_allow) 566 EVP_CIPHER_CTX_set_flags(ctx, 567 EVP_CIPH_FLAG_NON_FIPS_ALLOW); 568 569 if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc)) 570 { 571 BIO_printf(bio_err, "Error setting cipher %s\n", 572 EVP_CIPHER_name(cipher)); 573 ERR_print_errors(bio_err); 574 goto end; 575 } 576 577 if (nopad) 578 EVP_CIPHER_CTX_set_padding(ctx, 0); 579 580 if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc)) 581 { 582 BIO_printf(bio_err, "Error setting cipher %s\n", 583 EVP_CIPHER_name(cipher)); 584 ERR_print_errors(bio_err); 585 goto end; 586 } 587 588 if (debug) 589 { 590 BIO_set_callback(benc,BIO_debug_callback); 591 BIO_set_callback_arg(benc,(char *)bio_err); 592 } 593 594 if (printkey) 595 { 596 if (!nosalt) 597 { 598 printf("salt="); 599 for (i=0; i<(int)sizeof(salt); i++) 600 printf("%02X",salt[i]); 601 printf("\n"); 602 } 603 if (cipher->key_len > 0) 604 { 605 printf("key="); 606 for (i=0; i<cipher->key_len; i++) 607 printf("%02X",key[i]); 608 printf("\n"); 609 } 610 if (cipher->iv_len > 0) 611 { 612 printf("iv ="); 613 for (i=0; i<cipher->iv_len; i++) 614 printf("%02X",iv[i]); 615 printf("\n"); 616 } 617 if (printkey == 2) 618 { 619 ret=0; 620 goto end; 621 } 622 } 623 } 624 625 /* Only encrypt/decrypt as we write the file */ 626 if (benc != NULL) 627 wbio=BIO_push(benc,wbio); 628 629 for (;;) 630 { 631 inl=BIO_read(rbio,(char *)buff,bsize); 632 if (inl <= 0) break; 633 if (BIO_write(wbio,(char *)buff,inl) != inl) 634 { 635 BIO_printf(bio_err,"error writing output file\n"); 636 goto end; 637 } 638 } 639 if (!BIO_flush(wbio)) 640 { 641 BIO_printf(bio_err,"bad decrypt\n"); 642 goto end; 643 } 644 645 ret=0; 646 if (verbose) 647 { 648 BIO_printf(bio_err,"bytes read :%8ld\n",BIO_number_read(in)); 649 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out)); 650 } 651 end: 652 ERR_print_errors(bio_err); 653 if (strbuf != NULL) OPENSSL_free(strbuf); 654 if (buff != NULL) OPENSSL_free(buff); 655 if (in != NULL) BIO_free(in); 656 if (out != NULL) BIO_free_all(out); 657 if (benc != NULL) BIO_free(benc); 658 if (b64 != NULL) BIO_free(b64); 659 if(pass) OPENSSL_free(pass); 660 apps_shutdown(); 661 OPENSSL_EXIT(ret); 662 } 663 664 int set_hex(char *in, unsigned char *out, int size) 665 { 666 int i,n; 667 unsigned char j; 668 669 n=strlen(in); 670 if (n > (size*2)) 671 { 672 BIO_printf(bio_err,"hex string is too long\n"); 673 return(0); 674 } 675 memset(out,0,size); 676 for (i=0; i<n; i++) 677 { 678 j=(unsigned char)*in; 679 *(in++)='\0'; 680 if (j == 0) break; 681 if ((j >= '0') && (j <= '9')) 682 j-='0'; 683 else if ((j >= 'A') && (j <= 'F')) 684 j=j-'A'+10; 685 else if ((j >= 'a') && (j <= 'f')) 686 j=j-'a'+10; 687 else 688 { 689 BIO_printf(bio_err,"non-hex digit\n"); 690 return(0); 691 } 692 if (i&1) 693 out[i/2]|=j; 694 else 695 out[i/2]=(j<<4); 696 } 697 return(1); 698 } 699