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
show_ciphers(const OBJ_NAME * name,void * bio_)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
MAIN(int argc,char ** argv)102 int MAIN(int argc, char **argv)
103 {
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 char *md=NULL;
116 int enc=1,printkey=0,i,base64=0;
117 #ifdef ZLIB
118 int do_zlib=0;
119 BIO *bzl = NULL;
120 #endif
121 int debug=0,olb64=0,nosalt=0;
122 const EVP_CIPHER *cipher=NULL,*c;
123 EVP_CIPHER_CTX *ctx = NULL;
124 char *inf=NULL,*outf=NULL;
125 BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
126 #define PROG_NAME_SIZE 39
127 char pname[PROG_NAME_SIZE+1];
128 #ifndef OPENSSL_NO_ENGINE
129 char *engine = NULL;
130 #endif
131 const EVP_MD *dgst=NULL;
132
133 apps_startup();
134
135 if (bio_err == NULL)
136 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
137 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
138
139 if (!load_config(bio_err, NULL))
140 goto end;
141
142 /* first check the program name */
143 program_name(argv[0],pname,sizeof pname);
144 if (strcmp(pname,"base64") == 0)
145 base64=1;
146 #ifdef ZLIB
147 if (strcmp(pname,"zlib") == 0)
148 do_zlib=1;
149 #endif
150
151 cipher=EVP_get_cipherbyname(pname);
152 #ifdef ZLIB
153 if (!do_zlib && !base64 && (cipher == NULL)
154 && (strcmp(pname,"enc") != 0))
155 #else
156 if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
157 #endif
158 {
159 BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
160 goto bad;
161 }
162
163 argc--;
164 argv++;
165 while (argc >= 1)
166 {
167 if (strcmp(*argv,"-e") == 0)
168 enc=1;
169 else if (strcmp(*argv,"-in") == 0)
170 {
171 if (--argc < 1) goto bad;
172 inf= *(++argv);
173 }
174 else if (strcmp(*argv,"-out") == 0)
175 {
176 if (--argc < 1) goto bad;
177 outf= *(++argv);
178 }
179 else if (strcmp(*argv,"-pass") == 0)
180 {
181 if (--argc < 1) goto bad;
182 passarg= *(++argv);
183 }
184 #ifndef OPENSSL_NO_ENGINE
185 else if (strcmp(*argv,"-engine") == 0)
186 {
187 if (--argc < 1) goto bad;
188 engine= *(++argv);
189 }
190 #endif
191 else if (strcmp(*argv,"-d") == 0)
192 enc=0;
193 else if (strcmp(*argv,"-p") == 0)
194 printkey=1;
195 else if (strcmp(*argv,"-v") == 0)
196 verbose=1;
197 else if (strcmp(*argv,"-nopad") == 0)
198 nopad=1;
199 else if (strcmp(*argv,"-salt") == 0)
200 nosalt=0;
201 else if (strcmp(*argv,"-nosalt") == 0)
202 nosalt=1;
203 else if (strcmp(*argv,"-debug") == 0)
204 debug=1;
205 else if (strcmp(*argv,"-P") == 0)
206 printkey=2;
207 else if (strcmp(*argv,"-A") == 0)
208 olb64=1;
209 else if (strcmp(*argv,"-a") == 0)
210 base64=1;
211 else if (strcmp(*argv,"-base64") == 0)
212 base64=1;
213 #ifdef ZLIB
214 else if (strcmp(*argv,"-z") == 0)
215 do_zlib=1;
216 #endif
217 else if (strcmp(*argv,"-bufsize") == 0)
218 {
219 if (--argc < 1) goto bad;
220 bufsize=(unsigned char *)*(++argv);
221 }
222 else if (strcmp(*argv,"-k") == 0)
223 {
224 if (--argc < 1) goto bad;
225 str= *(++argv);
226 }
227 else if (strcmp(*argv,"-kfile") == 0)
228 {
229 static char buf[128];
230 FILE *infile;
231 char *file;
232
233 if (--argc < 1) goto bad;
234 file= *(++argv);
235 infile=fopen(file,"r");
236 if (infile == NULL)
237 {
238 BIO_printf(bio_err,"unable to read key from '%s'\n",
239 file);
240 goto bad;
241 }
242 buf[0]='\0';
243 if (!fgets(buf,sizeof buf,infile))
244 {
245 BIO_printf(bio_err,"unable to read key from '%s'\n",
246 file);
247 goto bad;
248 }
249 fclose(infile);
250 i=strlen(buf);
251 if ((i > 0) &&
252 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
253 buf[--i]='\0';
254 if ((i > 0) &&
255 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
256 buf[--i]='\0';
257 if (i < 1)
258 {
259 BIO_printf(bio_err,"zero length password\n");
260 goto bad;
261 }
262 str=buf;
263 }
264 else if (strcmp(*argv,"-K") == 0)
265 {
266 if (--argc < 1) goto bad;
267 hkey= *(++argv);
268 }
269 else if (strcmp(*argv,"-S") == 0)
270 {
271 if (--argc < 1) goto bad;
272 hsalt= *(++argv);
273 }
274 else if (strcmp(*argv,"-iv") == 0)
275 {
276 if (--argc < 1) goto bad;
277 hiv= *(++argv);
278 }
279 else if (strcmp(*argv,"-md") == 0)
280 {
281 if (--argc < 1) goto bad;
282 md= *(++argv);
283 }
284 else if ((argv[0][0] == '-') &&
285 ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
286 {
287 cipher=c;
288 }
289 else if (strcmp(*argv,"-none") == 0)
290 cipher=NULL;
291 else
292 {
293 BIO_printf(bio_err,"unknown option '%s'\n",*argv);
294 bad:
295 BIO_printf(bio_err,"options are\n");
296 BIO_printf(bio_err,"%-14s input file\n","-in <file>");
297 BIO_printf(bio_err,"%-14s output file\n","-out <file>");
298 BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>");
299 BIO_printf(bio_err,"%-14s encrypt\n","-e");
300 BIO_printf(bio_err,"%-14s decrypt\n","-d");
301 BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
302 BIO_printf(bio_err,"%-14s passphrase is the next argument\n","-k");
303 BIO_printf(bio_err,"%-14s passphrase is the first line of the file argument\n","-kfile");
304 BIO_printf(bio_err,"%-14s the next argument is the md to use to create a key\n","-md");
305 BIO_printf(bio_err,"%-14s from a passphrase. One of md2, md5, sha or sha1\n","");
306 BIO_printf(bio_err,"%-14s salt in hex is the next argument\n","-S");
307 BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
308 BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
309 BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
310 BIO_printf(bio_err,"%-14s disable standard block padding\n","-nopad");
311 #ifndef OPENSSL_NO_ENGINE
312 BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e");
313 #endif
314
315 BIO_printf(bio_err,"Cipher Types\n");
316 OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
317 show_ciphers,
318 bio_err);
319 BIO_printf(bio_err,"\n");
320
321 goto end;
322 }
323 argc--;
324 argv++;
325 }
326
327 #ifndef OPENSSL_NO_ENGINE
328 setup_engine(bio_err, engine, 0);
329 #endif
330
331 if (md && (dgst=EVP_get_digestbyname(md)) == NULL)
332 {
333 BIO_printf(bio_err,"%s is an unsupported message digest type\n",md);
334 goto end;
335 }
336
337 if (dgst == NULL)
338 {
339 dgst = EVP_md5();
340 }
341
342 if (bufsize != NULL)
343 {
344 unsigned long n;
345
346 for (n=0; *bufsize; bufsize++)
347 {
348 i= *bufsize;
349 if ((i <= '9') && (i >= '0'))
350 n=n*10+i-'0';
351 else if (i == 'k')
352 {
353 n*=1024;
354 bufsize++;
355 break;
356 }
357 }
358 if (*bufsize != '\0')
359 {
360 BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
361 goto end;
362 }
363
364 /* It must be large enough for a base64 encoded line */
365 if (base64 && n < 80) n=80;
366
367 bsize=(int)n;
368 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
369 }
370
371 strbuf=OPENSSL_malloc(SIZE);
372 buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize));
373 if ((buff == NULL) || (strbuf == NULL))
374 {
375 BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
376 goto end;
377 }
378
379 in=BIO_new(BIO_s_file());
380 out=BIO_new(BIO_s_file());
381 if ((in == NULL) || (out == NULL))
382 {
383 ERR_print_errors(bio_err);
384 goto end;
385 }
386 if (debug)
387 {
388 BIO_set_callback(in,BIO_debug_callback);
389 BIO_set_callback(out,BIO_debug_callback);
390 BIO_set_callback_arg(in,(char *)bio_err);
391 BIO_set_callback_arg(out,(char *)bio_err);
392 }
393
394 if (inf == NULL)
395 {
396 #ifndef OPENSSL_NO_SETVBUF_IONBF
397 if (bufsize != NULL)
398 setvbuf(stdin, (char *)NULL, _IONBF, 0);
399 #endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
400 BIO_set_fp(in,stdin,BIO_NOCLOSE);
401 }
402 else
403 {
404 if (BIO_read_filename(in,inf) <= 0)
405 {
406 perror(inf);
407 goto end;
408 }
409 }
410
411 if(!str && passarg) {
412 if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
413 BIO_printf(bio_err, "Error getting password\n");
414 goto end;
415 }
416 str = pass;
417 }
418
419 if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
420 {
421 for (;;)
422 {
423 char buf[200];
424
425 BIO_snprintf(buf,sizeof buf,"enter %s %s password:",
426 OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
427 (enc)?"encryption":"decryption");
428 strbuf[0]='\0';
429 i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
430 if (i == 0)
431 {
432 if (strbuf[0] == '\0')
433 {
434 ret=1;
435 goto end;
436 }
437 str=strbuf;
438 break;
439 }
440 if (i < 0)
441 {
442 BIO_printf(bio_err,"bad password read\n");
443 goto end;
444 }
445 }
446 }
447
448
449 if (outf == NULL)
450 {
451 BIO_set_fp(out,stdout,BIO_NOCLOSE);
452 #ifndef OPENSSL_NO_SETVBUF_IONBF
453 if (bufsize != NULL)
454 setvbuf(stdout, (char *)NULL, _IONBF, 0);
455 #endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
456 #ifdef OPENSSL_SYS_VMS
457 {
458 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
459 out = BIO_push(tmpbio, out);
460 }
461 #endif
462 }
463 else
464 {
465 if (BIO_write_filename(out,outf) <= 0)
466 {
467 perror(outf);
468 goto end;
469 }
470 }
471
472 rbio=in;
473 wbio=out;
474
475 #ifdef ZLIB
476
477 if (do_zlib)
478 {
479 if ((bzl=BIO_new(BIO_f_zlib())) == NULL)
480 goto end;
481 if (enc)
482 wbio=BIO_push(bzl,wbio);
483 else
484 rbio=BIO_push(bzl,rbio);
485 }
486 #endif
487
488 if (base64)
489 {
490 if ((b64=BIO_new(BIO_f_base64())) == NULL)
491 goto end;
492 if (debug)
493 {
494 BIO_set_callback(b64,BIO_debug_callback);
495 BIO_set_callback_arg(b64,(char *)bio_err);
496 }
497 if (olb64)
498 BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
499 if (enc)
500 wbio=BIO_push(b64,wbio);
501 else
502 rbio=BIO_push(b64,rbio);
503 }
504
505 if (cipher != NULL)
506 {
507 /* Note that str is NULL if a key was passed on the command
508 * line, so we get no salt in that case. Is this a bug?
509 */
510 if (str != NULL)
511 {
512 /* Salt handling: if encrypting generate a salt and
513 * write to output BIO. If decrypting read salt from
514 * input BIO.
515 */
516 unsigned char *sptr;
517 if(nosalt) sptr = NULL;
518 else {
519 if(enc) {
520 if(hsalt) {
521 if(!set_hex(hsalt,salt,sizeof salt)) {
522 BIO_printf(bio_err,
523 "invalid hex salt value\n");
524 goto end;
525 }
526 } else if (RAND_pseudo_bytes(salt, sizeof salt) < 0)
527 goto end;
528 /* If -P option then don't bother writing */
529 if((printkey != 2)
530 && (BIO_write(wbio,magic,
531 sizeof magic-1) != sizeof magic-1
532 || BIO_write(wbio,
533 (char *)salt,
534 sizeof salt) != sizeof salt)) {
535 BIO_printf(bio_err,"error writing output file\n");
536 goto end;
537 }
538 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
539 || BIO_read(rbio,
540 (unsigned char *)salt,
541 sizeof salt) != sizeof salt) {
542 BIO_printf(bio_err,"error reading input file\n");
543 goto end;
544 } else if(memcmp(mbuf,magic,sizeof magic-1)) {
545 BIO_printf(bio_err,"bad magic number\n");
546 goto end;
547 }
548
549 sptr = salt;
550 }
551
552 EVP_BytesToKey(cipher,dgst,sptr,
553 (unsigned char *)str,
554 strlen(str),1,key,iv);
555 /* zero the complete buffer or the string
556 * passed from the command line
557 * bug picked up by
558 * Larry J. Hughes Jr. <hughes@indiana.edu> */
559 if (str == strbuf)
560 OPENSSL_cleanse(str,SIZE);
561 else
562 OPENSSL_cleanse(str,strlen(str));
563 }
564 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv))
565 {
566 BIO_printf(bio_err,"invalid hex iv value\n");
567 goto end;
568 }
569 if ((hiv == NULL) && (str == NULL)
570 && EVP_CIPHER_iv_length(cipher) != 0)
571 {
572 /* No IV was explicitly set and no IV was generated
573 * during EVP_BytesToKey. Hence the IV is undefined,
574 * making correct decryption impossible. */
575 BIO_printf(bio_err, "iv undefined\n");
576 goto end;
577 }
578 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key))
579 {
580 BIO_printf(bio_err,"invalid hex key value\n");
581 goto end;
582 }
583
584 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
585 goto end;
586
587 /* Since we may be changing parameters work on the encryption
588 * context rather than calling BIO_set_cipher().
589 */
590
591 BIO_get_cipher_ctx(benc, &ctx);
592 if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc))
593 {
594 BIO_printf(bio_err, "Error setting cipher %s\n",
595 EVP_CIPHER_name(cipher));
596 ERR_print_errors(bio_err);
597 goto end;
598 }
599
600 if (nopad)
601 EVP_CIPHER_CTX_set_padding(ctx, 0);
602
603 if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc))
604 {
605 BIO_printf(bio_err, "Error setting cipher %s\n",
606 EVP_CIPHER_name(cipher));
607 ERR_print_errors(bio_err);
608 goto end;
609 }
610
611 if (debug)
612 {
613 BIO_set_callback(benc,BIO_debug_callback);
614 BIO_set_callback_arg(benc,(char *)bio_err);
615 }
616
617 if (printkey)
618 {
619 if (!nosalt)
620 {
621 printf("salt=");
622 for (i=0; i<(int)sizeof(salt); i++)
623 printf("%02X",salt[i]);
624 printf("\n");
625 }
626 if (cipher->key_len > 0)
627 {
628 printf("key=");
629 for (i=0; i<cipher->key_len; i++)
630 printf("%02X",key[i]);
631 printf("\n");
632 }
633 if (cipher->iv_len > 0)
634 {
635 printf("iv =");
636 for (i=0; i<cipher->iv_len; i++)
637 printf("%02X",iv[i]);
638 printf("\n");
639 }
640 if (printkey == 2)
641 {
642 ret=0;
643 goto end;
644 }
645 }
646 }
647
648 /* Only encrypt/decrypt as we write the file */
649 if (benc != NULL)
650 wbio=BIO_push(benc,wbio);
651
652 for (;;)
653 {
654 inl=BIO_read(rbio,(char *)buff,bsize);
655 if (inl <= 0) break;
656 if (BIO_write(wbio,(char *)buff,inl) != inl)
657 {
658 BIO_printf(bio_err,"error writing output file\n");
659 goto end;
660 }
661 }
662 if (!BIO_flush(wbio))
663 {
664 BIO_printf(bio_err,"bad decrypt\n");
665 goto end;
666 }
667
668 ret=0;
669 if (verbose)
670 {
671 BIO_printf(bio_err,"bytes read :%8ld\n",BIO_number_read(in));
672 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
673 }
674 end:
675 ERR_print_errors(bio_err);
676 if (strbuf != NULL) OPENSSL_free(strbuf);
677 if (buff != NULL) OPENSSL_free(buff);
678 if (in != NULL) BIO_free(in);
679 if (out != NULL) BIO_free_all(out);
680 if (benc != NULL) BIO_free(benc);
681 if (b64 != NULL) BIO_free(b64);
682 #ifdef ZLIB
683 if (bzl != NULL) BIO_free(bzl);
684 #endif
685 if(pass) OPENSSL_free(pass);
686 apps_shutdown();
687 OPENSSL_EXIT(ret);
688 }
689
set_hex(char * in,unsigned char * out,int size)690 int set_hex(char *in, unsigned char *out, int size)
691 {
692 int i,n;
693 unsigned char j;
694
695 n=strlen(in);
696 if (n > (size*2))
697 {
698 BIO_printf(bio_err,"hex string is too long\n");
699 return(0);
700 }
701 memset(out,0,size);
702 for (i=0; i<n; i++)
703 {
704 j=(unsigned char)*in;
705 *(in++)='\0';
706 if (j == 0) break;
707 if ((j >= '0') && (j <= '9'))
708 j-='0';
709 else if ((j >= 'A') && (j <= 'F'))
710 j=j-'A'+10;
711 else if ((j >= 'a') && (j <= 'f'))
712 j=j-'a'+10;
713 else
714 {
715 BIO_printf(bio_err,"non-hex digit\n");
716 return(0);
717 }
718 if (i&1)
719 out[i/2]|=j;
720 else
721 out[i/2]=(j<<4);
722 }
723 return(1);
724 }
725