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 <openssl/comp.h> 71 #include <ctype.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 static void show_ciphers(const OBJ_NAME *name,void *bio_) 83 { 84 BIO *bio=bio_; 85 static int n; 86 87 if(!islower((unsigned char)*name->name)) 88 return; 89 90 BIO_printf(bio,"-%-25s",name->name); 91 if(++n == 3) 92 { 93 BIO_printf(bio,"\n"); 94 n=0; 95 } 96 else 97 BIO_printf(bio," "); 98 } 99 100 int MAIN(int, char **); 101 102 int MAIN(int argc, char **argv) 103 { 104 #ifndef OPENSSL_NO_ENGINE 105 ENGINE *e = NULL; 106 #endif 107 static const char magic[]="Salted__"; 108 char mbuf[sizeof magic-1]; 109 char *strbuf=NULL; 110 unsigned char *buff=NULL,*bufsize=NULL; 111 int bsize=BSIZE,verbose=0; 112 int ret=1,inl; 113 int nopad = 0; 114 unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH]; 115 unsigned char salt[PKCS5_SALT_LEN]; 116 char *str=NULL, *passarg = NULL, *pass = NULL; 117 char *hkey=NULL,*hiv=NULL,*hsalt = NULL; 118 char *md=NULL; 119 int enc=1,printkey=0,i,base64=0; 120 #ifdef ZLIB 121 int do_zlib=0; 122 BIO *bzl = NULL; 123 #endif 124 int debug=0,olb64=0,nosalt=0; 125 const EVP_CIPHER *cipher=NULL,*c; 126 EVP_CIPHER_CTX *ctx = NULL; 127 char *inf=NULL,*outf=NULL; 128 BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL; 129 #define PROG_NAME_SIZE 39 130 char pname[PROG_NAME_SIZE+1]; 131 #ifndef OPENSSL_NO_ENGINE 132 char *engine = NULL; 133 #endif 134 const EVP_MD *dgst=NULL; 135 136 apps_startup(); 137 138 if (bio_err == NULL) 139 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 140 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 141 142 if (!load_config(bio_err, NULL)) 143 goto end; 144 145 /* first check the program name */ 146 program_name(argv[0],pname,sizeof pname); 147 if (strcmp(pname,"base64") == 0) 148 base64=1; 149 #ifdef ZLIB 150 if (strcmp(pname,"zlib") == 0) 151 do_zlib=1; 152 #endif 153 154 cipher=EVP_get_cipherbyname(pname); 155 #ifdef ZLIB 156 if (!do_zlib && !base64 && (cipher == NULL) 157 && (strcmp(pname,"enc") != 0)) 158 #else 159 if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0)) 160 #endif 161 { 162 BIO_printf(bio_err,"%s is an unknown cipher\n",pname); 163 goto bad; 164 } 165 166 argc--; 167 argv++; 168 while (argc >= 1) 169 { 170 if (strcmp(*argv,"-e") == 0) 171 enc=1; 172 else if (strcmp(*argv,"-in") == 0) 173 { 174 if (--argc < 1) goto bad; 175 inf= *(++argv); 176 } 177 else if (strcmp(*argv,"-out") == 0) 178 { 179 if (--argc < 1) goto bad; 180 outf= *(++argv); 181 } 182 else if (strcmp(*argv,"-pass") == 0) 183 { 184 if (--argc < 1) goto bad; 185 passarg= *(++argv); 186 } 187 #ifndef OPENSSL_NO_ENGINE 188 else if (strcmp(*argv,"-engine") == 0) 189 { 190 if (--argc < 1) goto bad; 191 engine= *(++argv); 192 } 193 #endif 194 else if (strcmp(*argv,"-d") == 0) 195 enc=0; 196 else if (strcmp(*argv,"-p") == 0) 197 printkey=1; 198 else if (strcmp(*argv,"-v") == 0) 199 verbose=1; 200 else if (strcmp(*argv,"-nopad") == 0) 201 nopad=1; 202 else if (strcmp(*argv,"-salt") == 0) 203 nosalt=0; 204 else if (strcmp(*argv,"-nosalt") == 0) 205 nosalt=1; 206 else if (strcmp(*argv,"-debug") == 0) 207 debug=1; 208 else if (strcmp(*argv,"-P") == 0) 209 printkey=2; 210 else if (strcmp(*argv,"-A") == 0) 211 olb64=1; 212 else if (strcmp(*argv,"-a") == 0) 213 base64=1; 214 else if (strcmp(*argv,"-base64") == 0) 215 base64=1; 216 #ifdef ZLIB 217 else if (strcmp(*argv,"-z") == 0) 218 do_zlib=1; 219 #endif 220 else if (strcmp(*argv,"-bufsize") == 0) 221 { 222 if (--argc < 1) goto bad; 223 bufsize=(unsigned char *)*(++argv); 224 } 225 else if (strcmp(*argv,"-k") == 0) 226 { 227 if (--argc < 1) goto bad; 228 str= *(++argv); 229 } 230 else if (strcmp(*argv,"-kfile") == 0) 231 { 232 static char buf[128]; 233 FILE *infile; 234 char *file; 235 236 if (--argc < 1) goto bad; 237 file= *(++argv); 238 infile=fopen(file,"r"); 239 if (infile == NULL) 240 { 241 BIO_printf(bio_err,"unable to read key from '%s'\n", 242 file); 243 goto bad; 244 } 245 buf[0]='\0'; 246 if (!fgets(buf,sizeof buf,infile)) 247 { 248 BIO_printf(bio_err,"unable to read key from '%s'\n", 249 file); 250 goto bad; 251 } 252 fclose(infile); 253 i=strlen(buf); 254 if ((i > 0) && 255 ((buf[i-1] == '\n') || (buf[i-1] == '\r'))) 256 buf[--i]='\0'; 257 if ((i > 0) && 258 ((buf[i-1] == '\n') || (buf[i-1] == '\r'))) 259 buf[--i]='\0'; 260 if (i < 1) 261 { 262 BIO_printf(bio_err,"zero length password\n"); 263 goto bad; 264 } 265 str=buf; 266 } 267 else if (strcmp(*argv,"-K") == 0) 268 { 269 if (--argc < 1) goto bad; 270 hkey= *(++argv); 271 } 272 else if (strcmp(*argv,"-S") == 0) 273 { 274 if (--argc < 1) goto bad; 275 hsalt= *(++argv); 276 } 277 else if (strcmp(*argv,"-iv") == 0) 278 { 279 if (--argc < 1) goto bad; 280 hiv= *(++argv); 281 } 282 else if (strcmp(*argv,"-md") == 0) 283 { 284 if (--argc < 1) goto bad; 285 md= *(++argv); 286 } 287 else if ((argv[0][0] == '-') && 288 ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL)) 289 { 290 cipher=c; 291 } 292 else if (strcmp(*argv,"-none") == 0) 293 cipher=NULL; 294 else 295 { 296 BIO_printf(bio_err,"unknown option '%s'\n",*argv); 297 bad: 298 BIO_printf(bio_err,"options are\n"); 299 BIO_printf(bio_err,"%-14s input file\n","-in <file>"); 300 BIO_printf(bio_err,"%-14s output file\n","-out <file>"); 301 BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>"); 302 BIO_printf(bio_err,"%-14s encrypt\n","-e"); 303 BIO_printf(bio_err,"%-14s decrypt\n","-d"); 304 BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64"); 305 BIO_printf(bio_err,"%-14s passphrase is the next argument\n","-k"); 306 BIO_printf(bio_err,"%-14s passphrase is the first line of the file argument\n","-kfile"); 307 BIO_printf(bio_err,"%-14s the next argument is the md to use to create a key\n","-md"); 308 BIO_printf(bio_err,"%-14s from a passphrase. One of md2, md5, sha or sha1\n",""); 309 BIO_printf(bio_err,"%-14s salt in hex is the next argument\n","-S"); 310 BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv"); 311 BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]"); 312 BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>"); 313 BIO_printf(bio_err,"%-14s disable standard block padding\n","-nopad"); 314 #ifndef OPENSSL_NO_ENGINE 315 BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e"); 316 #endif 317 318 BIO_printf(bio_err,"Cipher Types\n"); 319 OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, 320 show_ciphers, 321 bio_err); 322 BIO_printf(bio_err,"\n"); 323 324 goto end; 325 } 326 argc--; 327 argv++; 328 } 329 330 #ifndef OPENSSL_NO_ENGINE 331 e = setup_engine(bio_err, engine, 0); 332 #endif 333 334 if (md && (dgst=EVP_get_digestbyname(md)) == NULL) 335 { 336 BIO_printf(bio_err,"%s is an unsupported message digest type\n",md); 337 goto end; 338 } 339 340 if (dgst == NULL) 341 { 342 dgst = EVP_md5(); 343 } 344 345 if (bufsize != NULL) 346 { 347 unsigned long n; 348 349 for (n=0; *bufsize; bufsize++) 350 { 351 i= *bufsize; 352 if ((i <= '9') && (i >= '0')) 353 n=n*10+i-'0'; 354 else if (i == 'k') 355 { 356 n*=1024; 357 bufsize++; 358 break; 359 } 360 } 361 if (*bufsize != '\0') 362 { 363 BIO_printf(bio_err,"invalid 'bufsize' specified.\n"); 364 goto end; 365 } 366 367 /* It must be large enough for a base64 encoded line */ 368 if (base64 && n < 80) n=80; 369 370 bsize=(int)n; 371 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize); 372 } 373 374 strbuf=OPENSSL_malloc(SIZE); 375 buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize)); 376 if ((buff == NULL) || (strbuf == NULL)) 377 { 378 BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize)); 379 goto end; 380 } 381 382 in=BIO_new(BIO_s_file()); 383 out=BIO_new(BIO_s_file()); 384 if ((in == NULL) || (out == NULL)) 385 { 386 ERR_print_errors(bio_err); 387 goto end; 388 } 389 if (debug) 390 { 391 BIO_set_callback(in,BIO_debug_callback); 392 BIO_set_callback(out,BIO_debug_callback); 393 BIO_set_callback_arg(in,(char *)bio_err); 394 BIO_set_callback_arg(out,(char *)bio_err); 395 } 396 397 if (inf == NULL) 398 { 399 if (bufsize != NULL) 400 setvbuf(stdin, (char *)NULL, _IONBF, 0); 401 BIO_set_fp(in,stdin,BIO_NOCLOSE); 402 } 403 else 404 { 405 if (BIO_read_filename(in,inf) <= 0) 406 { 407 perror(inf); 408 goto end; 409 } 410 } 411 412 if(!str && passarg) { 413 if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) { 414 BIO_printf(bio_err, "Error getting password\n"); 415 goto end; 416 } 417 str = pass; 418 } 419 420 if ((str == NULL) && (cipher != NULL) && (hkey == NULL)) 421 { 422 for (;;) 423 { 424 char buf[200]; 425 426 BIO_snprintf(buf,sizeof buf,"enter %s %s password:", 427 OBJ_nid2ln(EVP_CIPHER_nid(cipher)), 428 (enc)?"encryption":"decryption"); 429 strbuf[0]='\0'; 430 i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc); 431 if (i == 0) 432 { 433 if (strbuf[0] == '\0') 434 { 435 ret=1; 436 goto end; 437 } 438 str=strbuf; 439 break; 440 } 441 if (i < 0) 442 { 443 BIO_printf(bio_err,"bad password read\n"); 444 goto end; 445 } 446 } 447 } 448 449 450 if (outf == NULL) 451 { 452 BIO_set_fp(out,stdout,BIO_NOCLOSE); 453 if (bufsize != NULL) 454 setvbuf(stdout, (char *)NULL, _IONBF, 0); 455 #ifdef OPENSSL_SYS_VMS 456 { 457 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 458 out = BIO_push(tmpbio, out); 459 } 460 #endif 461 } 462 else 463 { 464 if (BIO_write_filename(out,outf) <= 0) 465 { 466 perror(outf); 467 goto end; 468 } 469 } 470 471 rbio=in; 472 wbio=out; 473 474 #ifdef ZLIB 475 476 if (do_zlib) 477 { 478 if ((bzl=BIO_new(BIO_f_zlib())) == NULL) 479 goto end; 480 if (enc) 481 wbio=BIO_push(bzl,wbio); 482 else 483 rbio=BIO_push(bzl,rbio); 484 } 485 #endif 486 487 if (base64) 488 { 489 if ((b64=BIO_new(BIO_f_base64())) == NULL) 490 goto end; 491 if (debug) 492 { 493 BIO_set_callback(b64,BIO_debug_callback); 494 BIO_set_callback_arg(b64,(char *)bio_err); 495 } 496 if (olb64) 497 BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL); 498 if (enc) 499 wbio=BIO_push(b64,wbio); 500 else 501 rbio=BIO_push(b64,rbio); 502 } 503 504 if (cipher != NULL) 505 { 506 /* Note that str is NULL if a key was passed on the command 507 * line, so we get no salt in that case. Is this a bug? 508 */ 509 if (str != NULL) 510 { 511 /* Salt handling: if encrypting generate a salt and 512 * write to output BIO. If decrypting read salt from 513 * input BIO. 514 */ 515 unsigned char *sptr; 516 if(nosalt) sptr = NULL; 517 else { 518 if(enc) { 519 if(hsalt) { 520 if(!set_hex(hsalt,salt,sizeof salt)) { 521 BIO_printf(bio_err, 522 "invalid hex salt value\n"); 523 goto end; 524 } 525 } else if (RAND_pseudo_bytes(salt, sizeof salt) < 0) 526 goto end; 527 /* If -P option then don't bother writing */ 528 if((printkey != 2) 529 && (BIO_write(wbio,magic, 530 sizeof magic-1) != sizeof magic-1 531 || BIO_write(wbio, 532 (char *)salt, 533 sizeof salt) != sizeof salt)) { 534 BIO_printf(bio_err,"error writing output file\n"); 535 goto end; 536 } 537 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf 538 || BIO_read(rbio, 539 (unsigned char *)salt, 540 sizeof salt) != sizeof salt) { 541 BIO_printf(bio_err,"error reading input file\n"); 542 goto end; 543 } else if(memcmp(mbuf,magic,sizeof magic-1)) { 544 BIO_printf(bio_err,"bad magic number\n"); 545 goto end; 546 } 547 548 sptr = salt; 549 } 550 551 EVP_BytesToKey(cipher,dgst,sptr, 552 (unsigned char *)str, 553 strlen(str),1,key,iv); 554 /* zero the complete buffer or the string 555 * passed from the command line 556 * bug picked up by 557 * Larry J. Hughes Jr. <hughes@indiana.edu> */ 558 if (str == strbuf) 559 OPENSSL_cleanse(str,SIZE); 560 else 561 OPENSSL_cleanse(str,strlen(str)); 562 } 563 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv)) 564 { 565 BIO_printf(bio_err,"invalid hex iv value\n"); 566 goto end; 567 } 568 if ((hiv == NULL) && (str == NULL) 569 && EVP_CIPHER_iv_length(cipher) != 0) 570 { 571 /* No IV was explicitly set and no IV was generated 572 * during EVP_BytesToKey. Hence the IV is undefined, 573 * making correct decryption impossible. */ 574 BIO_printf(bio_err, "iv undefined\n"); 575 goto end; 576 } 577 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key)) 578 { 579 BIO_printf(bio_err,"invalid hex key value\n"); 580 goto end; 581 } 582 583 if ((benc=BIO_new(BIO_f_cipher())) == NULL) 584 goto end; 585 586 /* Since we may be changing parameters work on the encryption 587 * context rather than calling BIO_set_cipher(). 588 */ 589 590 BIO_get_cipher_ctx(benc, &ctx); 591 if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc)) 592 { 593 BIO_printf(bio_err, "Error setting cipher %s\n", 594 EVP_CIPHER_name(cipher)); 595 ERR_print_errors(bio_err); 596 goto end; 597 } 598 599 if (nopad) 600 EVP_CIPHER_CTX_set_padding(ctx, 0); 601 602 if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc)) 603 { 604 BIO_printf(bio_err, "Error setting cipher %s\n", 605 EVP_CIPHER_name(cipher)); 606 ERR_print_errors(bio_err); 607 goto end; 608 } 609 610 if (debug) 611 { 612 BIO_set_callback(benc,BIO_debug_callback); 613 BIO_set_callback_arg(benc,(char *)bio_err); 614 } 615 616 if (printkey) 617 { 618 if (!nosalt) 619 { 620 printf("salt="); 621 for (i=0; i<(int)sizeof(salt); i++) 622 printf("%02X",salt[i]); 623 printf("\n"); 624 } 625 if (cipher->key_len > 0) 626 { 627 printf("key="); 628 for (i=0; i<cipher->key_len; i++) 629 printf("%02X",key[i]); 630 printf("\n"); 631 } 632 if (cipher->iv_len > 0) 633 { 634 printf("iv ="); 635 for (i=0; i<cipher->iv_len; i++) 636 printf("%02X",iv[i]); 637 printf("\n"); 638 } 639 if (printkey == 2) 640 { 641 ret=0; 642 goto end; 643 } 644 } 645 } 646 647 /* Only encrypt/decrypt as we write the file */ 648 if (benc != NULL) 649 wbio=BIO_push(benc,wbio); 650 651 for (;;) 652 { 653 inl=BIO_read(rbio,(char *)buff,bsize); 654 if (inl <= 0) break; 655 if (BIO_write(wbio,(char *)buff,inl) != inl) 656 { 657 BIO_printf(bio_err,"error writing output file\n"); 658 goto end; 659 } 660 } 661 if (!BIO_flush(wbio)) 662 { 663 BIO_printf(bio_err,"bad decrypt\n"); 664 goto end; 665 } 666 667 ret=0; 668 if (verbose) 669 { 670 BIO_printf(bio_err,"bytes read :%8ld\n",BIO_number_read(in)); 671 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out)); 672 } 673 end: 674 ERR_print_errors(bio_err); 675 if (strbuf != NULL) OPENSSL_free(strbuf); 676 if (buff != NULL) OPENSSL_free(buff); 677 if (in != NULL) BIO_free(in); 678 if (out != NULL) BIO_free_all(out); 679 if (benc != NULL) BIO_free(benc); 680 if (b64 != NULL) BIO_free(b64); 681 #ifdef ZLIB 682 if (bzl != NULL) BIO_free(bzl); 683 #endif 684 if(pass) OPENSSL_free(pass); 685 apps_shutdown(); 686 OPENSSL_EXIT(ret); 687 } 688 689 int set_hex(char *in, unsigned char *out, int size) 690 { 691 int i,n; 692 unsigned char j; 693 694 n=strlen(in); 695 if (n > (size*2)) 696 { 697 BIO_printf(bio_err,"hex string is too long\n"); 698 return(0); 699 } 700 memset(out,0,size); 701 for (i=0; i<n; i++) 702 { 703 j=(unsigned char)*in; 704 *(in++)='\0'; 705 if (j == 0) break; 706 if ((j >= '0') && (j <= '9')) 707 j-='0'; 708 else if ((j >= 'A') && (j <= 'F')) 709 j=j-'A'+10; 710 else if ((j >= 'a') && (j <= 'f')) 711 j=j-'a'+10; 712 else 713 { 714 BIO_printf(bio_err,"non-hex digit\n"); 715 return(0); 716 } 717 if (i&1) 718 out[i/2]|=j; 719 else 720 out[i/2]=(j<<4); 721 } 722 return(1); 723 } 724