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 ENGINE *e = NULL; 104 static const char magic[]="Salted__"; 105 char mbuf[sizeof magic-1]; 106 char *strbuf=NULL; 107 unsigned char *buff=NULL,*bufsize=NULL; 108 int bsize=BSIZE,verbose=0; 109 int ret=1,inl; 110 int nopad = 0; 111 unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH]; 112 unsigned char salt[PKCS5_SALT_LEN]; 113 char *str=NULL, *passarg = NULL, *pass = NULL; 114 char *hkey=NULL,*hiv=NULL,*hsalt = NULL; 115 int enc=1,printkey=0,i,base64=0; 116 int debug=0,olb64=0,nosalt=0; 117 const EVP_CIPHER *cipher=NULL,*c; 118 char *inf=NULL,*outf=NULL; 119 BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL; 120 #define PROG_NAME_SIZE 39 121 char pname[PROG_NAME_SIZE+1]; 122 char *engine = NULL; 123 124 apps_startup(); 125 126 if (bio_err == NULL) 127 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 128 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 129 130 if (!load_config(bio_err, NULL)) 131 goto end; 132 133 /* first check the program name */ 134 program_name(argv[0],pname,sizeof pname); 135 if (strcmp(pname,"base64") == 0) 136 base64=1; 137 138 cipher=EVP_get_cipherbyname(pname); 139 if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0)) 140 { 141 BIO_printf(bio_err,"%s is an unknown cipher\n",pname); 142 goto bad; 143 } 144 145 argc--; 146 argv++; 147 while (argc >= 1) 148 { 149 if (strcmp(*argv,"-e") == 0) 150 enc=1; 151 else if (strcmp(*argv,"-in") == 0) 152 { 153 if (--argc < 1) goto bad; 154 inf= *(++argv); 155 } 156 else if (strcmp(*argv,"-out") == 0) 157 { 158 if (--argc < 1) goto bad; 159 outf= *(++argv); 160 } 161 else if (strcmp(*argv,"-pass") == 0) 162 { 163 if (--argc < 1) goto bad; 164 passarg= *(++argv); 165 } 166 else if (strcmp(*argv,"-engine") == 0) 167 { 168 if (--argc < 1) goto bad; 169 engine= *(++argv); 170 } 171 else if (strcmp(*argv,"-d") == 0) 172 enc=0; 173 else if (strcmp(*argv,"-p") == 0) 174 printkey=1; 175 else if (strcmp(*argv,"-v") == 0) 176 verbose=1; 177 else if (strcmp(*argv,"-nopad") == 0) 178 nopad=1; 179 else if (strcmp(*argv,"-salt") == 0) 180 nosalt=0; 181 else if (strcmp(*argv,"-nosalt") == 0) 182 nosalt=1; 183 else if (strcmp(*argv,"-debug") == 0) 184 debug=1; 185 else if (strcmp(*argv,"-P") == 0) 186 printkey=2; 187 else if (strcmp(*argv,"-A") == 0) 188 olb64=1; 189 else if (strcmp(*argv,"-a") == 0) 190 base64=1; 191 else if (strcmp(*argv,"-base64") == 0) 192 base64=1; 193 else if (strcmp(*argv,"-bufsize") == 0) 194 { 195 if (--argc < 1) goto bad; 196 bufsize=(unsigned char *)*(++argv); 197 } 198 else if (strcmp(*argv,"-k") == 0) 199 { 200 if (--argc < 1) goto bad; 201 str= *(++argv); 202 } 203 else if (strcmp(*argv,"-kfile") == 0) 204 { 205 static char buf[128]; 206 FILE *infile; 207 char *file; 208 209 if (--argc < 1) goto bad; 210 file= *(++argv); 211 infile=fopen(file,"r"); 212 if (infile == NULL) 213 { 214 BIO_printf(bio_err,"unable to read key from '%s'\n", 215 file); 216 goto bad; 217 } 218 buf[0]='\0'; 219 fgets(buf,sizeof buf,infile); 220 fclose(infile); 221 i=strlen(buf); 222 if ((i > 0) && 223 ((buf[i-1] == '\n') || (buf[i-1] == '\r'))) 224 buf[--i]='\0'; 225 if ((i > 0) && 226 ((buf[i-1] == '\n') || (buf[i-1] == '\r'))) 227 buf[--i]='\0'; 228 if (i < 1) 229 { 230 BIO_printf(bio_err,"zero length password\n"); 231 goto bad; 232 } 233 str=buf; 234 } 235 else if (strcmp(*argv,"-K") == 0) 236 { 237 if (--argc < 1) goto bad; 238 hkey= *(++argv); 239 } 240 else if (strcmp(*argv,"-S") == 0) 241 { 242 if (--argc < 1) goto bad; 243 hsalt= *(++argv); 244 } 245 else if (strcmp(*argv,"-iv") == 0) 246 { 247 if (--argc < 1) goto bad; 248 hiv= *(++argv); 249 } 250 else if ((argv[0][0] == '-') && 251 ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL)) 252 { 253 cipher=c; 254 } 255 else if (strcmp(*argv,"-none") == 0) 256 cipher=NULL; 257 else 258 { 259 BIO_printf(bio_err,"unknown option '%s'\n",*argv); 260 bad: 261 BIO_printf(bio_err,"options are\n"); 262 BIO_printf(bio_err,"%-14s input file\n","-in <file>"); 263 BIO_printf(bio_err,"%-14s output file\n","-out <file>"); 264 BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>"); 265 BIO_printf(bio_err,"%-14s encrypt\n","-e"); 266 BIO_printf(bio_err,"%-14s decrypt\n","-d"); 267 BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64"); 268 BIO_printf(bio_err,"%-14s key is the next argument\n","-k"); 269 BIO_printf(bio_err,"%-14s key is the first line of the file argument\n","-kfile"); 270 BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv"); 271 BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]"); 272 BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>"); 273 BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e"); 274 275 BIO_printf(bio_err,"Cipher Types\n"); 276 OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, 277 show_ciphers, 278 bio_err); 279 BIO_printf(bio_err,"\n"); 280 281 goto end; 282 } 283 argc--; 284 argv++; 285 } 286 287 e = setup_engine(bio_err, engine, 0); 288 289 if (bufsize != NULL) 290 { 291 unsigned long n; 292 293 for (n=0; *bufsize; bufsize++) 294 { 295 i= *bufsize; 296 if ((i <= '9') && (i >= '0')) 297 n=n*10+i-'0'; 298 else if (i == 'k') 299 { 300 n*=1024; 301 bufsize++; 302 break; 303 } 304 } 305 if (*bufsize != '\0') 306 { 307 BIO_printf(bio_err,"invalid 'bufsize' specified.\n"); 308 goto end; 309 } 310 311 /* It must be large enough for a base64 encoded line */ 312 if (n < 80) n=80; 313 314 bsize=(int)n; 315 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize); 316 } 317 318 strbuf=OPENSSL_malloc(SIZE); 319 buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize)); 320 if ((buff == NULL) || (strbuf == NULL)) 321 { 322 BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize)); 323 goto end; 324 } 325 326 in=BIO_new(BIO_s_file()); 327 out=BIO_new(BIO_s_file()); 328 if ((in == NULL) || (out == NULL)) 329 { 330 ERR_print_errors(bio_err); 331 goto end; 332 } 333 if (debug) 334 { 335 BIO_set_callback(in,BIO_debug_callback); 336 BIO_set_callback(out,BIO_debug_callback); 337 BIO_set_callback_arg(in,bio_err); 338 BIO_set_callback_arg(out,bio_err); 339 } 340 341 if (inf == NULL) 342 BIO_set_fp(in,stdin,BIO_NOCLOSE); 343 else 344 { 345 if (BIO_read_filename(in,inf) <= 0) 346 { 347 perror(inf); 348 goto end; 349 } 350 } 351 352 if(!str && passarg) { 353 if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) { 354 BIO_printf(bio_err, "Error getting password\n"); 355 goto end; 356 } 357 str = pass; 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 } 388 389 390 if (outf == NULL) 391 { 392 BIO_set_fp(out,stdout,BIO_NOCLOSE); 393 #ifdef OPENSSL_SYS_VMS 394 { 395 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 396 out = BIO_push(tmpbio, out); 397 } 398 #endif 399 } 400 else 401 { 402 if (BIO_write_filename(out,outf) <= 0) 403 { 404 perror(outf); 405 goto end; 406 } 407 } 408 409 rbio=in; 410 wbio=out; 411 412 if (base64) 413 { 414 if ((b64=BIO_new(BIO_f_base64())) == NULL) 415 goto end; 416 if (debug) 417 { 418 BIO_set_callback(b64,BIO_debug_callback); 419 BIO_set_callback_arg(b64,bio_err); 420 } 421 if (olb64) 422 BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL); 423 if (enc) 424 wbio=BIO_push(b64,wbio); 425 else 426 rbio=BIO_push(b64,rbio); 427 } 428 429 if (cipher != NULL) 430 { 431 /* Note that str is NULL if a key was passed on the command 432 * line, so we get no salt in that case. Is this a bug? 433 */ 434 if (str != NULL) 435 { 436 /* Salt handling: if encrypting generate a salt and 437 * write to output BIO. If decrypting read salt from 438 * input BIO. 439 */ 440 unsigned char *sptr; 441 if(nosalt) sptr = NULL; 442 else { 443 if(enc) { 444 if(hsalt) { 445 if(!set_hex(hsalt,salt,sizeof salt)) { 446 BIO_printf(bio_err, 447 "invalid hex salt value\n"); 448 goto end; 449 } 450 } else if (RAND_pseudo_bytes(salt, sizeof salt) < 0) 451 goto end; 452 /* If -P option then don't bother writing */ 453 if((printkey != 2) 454 && (BIO_write(wbio,magic, 455 sizeof magic-1) != sizeof magic-1 456 || BIO_write(wbio, 457 (char *)salt, 458 sizeof salt) != sizeof salt)) { 459 BIO_printf(bio_err,"error writing output file\n"); 460 goto end; 461 } 462 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf 463 || BIO_read(rbio, 464 (unsigned char *)salt, 465 sizeof salt) != sizeof salt) { 466 BIO_printf(bio_err,"error reading input file\n"); 467 goto end; 468 } else if(memcmp(mbuf,magic,sizeof magic-1)) { 469 BIO_printf(bio_err,"bad magic number\n"); 470 goto end; 471 } 472 473 sptr = salt; 474 } 475 476 EVP_BytesToKey(cipher,EVP_md5(),sptr, 477 (unsigned char *)str, 478 strlen(str),1,key,iv); 479 /* zero the complete buffer or the string 480 * passed from the command line 481 * bug picked up by 482 * Larry J. Hughes Jr. <hughes@indiana.edu> */ 483 if (str == strbuf) 484 OPENSSL_cleanse(str,SIZE); 485 else 486 OPENSSL_cleanse(str,strlen(str)); 487 } 488 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv)) 489 { 490 BIO_printf(bio_err,"invalid hex iv value\n"); 491 goto end; 492 } 493 if ((hiv == NULL) && (str == NULL)) 494 { 495 /* No IV was explicitly set and no IV was generated 496 * during EVP_BytesToKey. Hence the IV is undefined, 497 * making correct decryption impossible. */ 498 BIO_printf(bio_err, "iv undefined\n"); 499 goto end; 500 } 501 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key)) 502 { 503 BIO_printf(bio_err,"invalid hex key value\n"); 504 goto end; 505 } 506 507 if ((benc=BIO_new(BIO_f_cipher())) == NULL) 508 goto end; 509 BIO_set_cipher(benc,cipher,key,iv,enc); 510 if (nopad) 511 { 512 EVP_CIPHER_CTX *ctx; 513 BIO_get_cipher_ctx(benc, &ctx); 514 EVP_CIPHER_CTX_set_padding(ctx, 0); 515 } 516 if (debug) 517 { 518 BIO_set_callback(benc,BIO_debug_callback); 519 BIO_set_callback_arg(benc,bio_err); 520 } 521 522 if (printkey) 523 { 524 if (!nosalt) 525 { 526 printf("salt="); 527 for (i=0; i<sizeof salt; i++) 528 printf("%02X",salt[i]); 529 printf("\n"); 530 } 531 if (cipher->key_len > 0) 532 { 533 printf("key="); 534 for (i=0; i<cipher->key_len; i++) 535 printf("%02X",key[i]); 536 printf("\n"); 537 } 538 if (cipher->iv_len > 0) 539 { 540 printf("iv ="); 541 for (i=0; i<cipher->iv_len; i++) 542 printf("%02X",iv[i]); 543 printf("\n"); 544 } 545 if (printkey == 2) 546 { 547 ret=0; 548 goto end; 549 } 550 } 551 } 552 553 /* Only encrypt/decrypt as we write the file */ 554 if (benc != NULL) 555 wbio=BIO_push(benc,wbio); 556 557 for (;;) 558 { 559 inl=BIO_read(rbio,(char *)buff,bsize); 560 if (inl <= 0) break; 561 if (BIO_write(wbio,(char *)buff,inl) != inl) 562 { 563 BIO_printf(bio_err,"error writing output file\n"); 564 goto end; 565 } 566 } 567 if (!BIO_flush(wbio)) 568 { 569 BIO_printf(bio_err,"bad decrypt\n"); 570 goto end; 571 } 572 573 ret=0; 574 if (verbose) 575 { 576 BIO_printf(bio_err,"bytes read :%8ld\n",BIO_number_read(in)); 577 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out)); 578 } 579 end: 580 ERR_print_errors(bio_err); 581 if (strbuf != NULL) OPENSSL_free(strbuf); 582 if (buff != NULL) OPENSSL_free(buff); 583 if (in != NULL) BIO_free(in); 584 if (out != NULL) BIO_free_all(out); 585 if (benc != NULL) BIO_free(benc); 586 if (b64 != NULL) BIO_free(b64); 587 if(pass) OPENSSL_free(pass); 588 apps_shutdown(); 589 OPENSSL_EXIT(ret); 590 } 591 592 int set_hex(char *in, unsigned char *out, int size) 593 { 594 int i,n; 595 unsigned char j; 596 597 n=strlen(in); 598 if (n > (size*2)) 599 { 600 BIO_printf(bio_err,"hex string is too long\n"); 601 return(0); 602 } 603 memset(out,0,size); 604 for (i=0; i<n; i++) 605 { 606 j=(unsigned char)*in; 607 *(in++)='\0'; 608 if (j == 0) break; 609 if ((j >= '0') && (j <= '9')) 610 j-='0'; 611 else if ((j >= 'A') && (j <= 'F')) 612 j=j-'A'+10; 613 else if ((j >= 'a') && (j <= 'f')) 614 j=j-'a'+10; 615 else 616 { 617 BIO_printf(bio_err,"non-hex digit\n"); 618 return(0); 619 } 620 if (i&1) 621 out[i/2]|=j; 622 else 623 out[i/2]=(j<<4); 624 } 625 return(1); 626 } 627