8c5527783b22550e6648065d4a7645fbef1a03ea
[openssl.git] / apps / enc.c
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         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                         if (!EVP_BytesToKey(cipher,dgst,sptr,
553                                             (unsigned char *)str,
554                                             strlen(str),1,key,iv))
555                                 {
556                                 BIO_printf(bio_err, "EVP_BytesToKey failed\n");
557                                 goto end;
558                                 }
559                         /* zero the complete buffer or the string
560                          * passed from the command line
561                          * bug picked up by
562                          * Larry J. Hughes Jr. <hughes@indiana.edu> */
563                         if (str == strbuf)
564                                 OPENSSL_cleanse(str,SIZE);
565                         else
566                                 OPENSSL_cleanse(str,strlen(str));
567                         }
568                 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv))
569                         {
570                         BIO_printf(bio_err,"invalid hex iv value\n");
571                         goto end;
572                         }
573                 if ((hiv == NULL) && (str == NULL)
574                     && EVP_CIPHER_iv_length(cipher) != 0)
575                         {
576                         /* No IV was explicitly set and no IV was generated
577                          * during EVP_BytesToKey. Hence the IV is undefined,
578                          * making correct decryption impossible. */
579                         BIO_printf(bio_err, "iv undefined\n");
580                         goto end;
581                         }
582                 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key))
583                         {
584                         BIO_printf(bio_err,"invalid hex key value\n");
585                         goto end;
586                         }
587
588                 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
589                         goto end;
590
591                 /* Since we may be changing parameters work on the encryption
592                  * context rather than calling BIO_set_cipher().
593                  */
594
595                 BIO_get_cipher_ctx(benc, &ctx);
596                 if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc))
597                         {
598                         BIO_printf(bio_err, "Error setting cipher %s\n",
599                                 EVP_CIPHER_name(cipher));
600                         ERR_print_errors(bio_err);
601                         goto end;
602                         }
603
604                 if (nopad)
605                         EVP_CIPHER_CTX_set_padding(ctx, 0);
606
607                 if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc))
608                         {
609                         BIO_printf(bio_err, "Error setting cipher %s\n",
610                                 EVP_CIPHER_name(cipher));
611                         ERR_print_errors(bio_err);
612                         goto end;
613                         }
614
615                 if (debug)
616                         {
617                         BIO_set_callback(benc,BIO_debug_callback);
618                         BIO_set_callback_arg(benc,(char *)bio_err);
619                         }
620
621                 if (printkey)
622                         {
623                         if (!nosalt)
624                                 {
625                                 printf("salt=");
626                                 for (i=0; i<(int)sizeof(salt); i++)
627                                         printf("%02X",salt[i]);
628                                 printf("\n");
629                                 }
630                         if (cipher->key_len > 0)
631                                 {
632                                 printf("key=");
633                                 for (i=0; i<cipher->key_len; i++)
634                                         printf("%02X",key[i]);
635                                 printf("\n");
636                                 }
637                         if (cipher->iv_len > 0)
638                                 {
639                                 printf("iv =");
640                                 for (i=0; i<cipher->iv_len; i++)
641                                         printf("%02X",iv[i]);
642                                 printf("\n");
643                                 }
644                         if (printkey == 2)
645                                 {
646                                 ret=0;
647                                 goto end;
648                                 }
649                         }
650                 }
651
652         /* Only encrypt/decrypt as we write the file */
653         if (benc != NULL)
654                 wbio=BIO_push(benc,wbio);
655
656         for (;;)
657                 {
658                 inl=BIO_read(rbio,(char *)buff,bsize);
659                 if (inl <= 0) break;
660                 if (BIO_write(wbio,(char *)buff,inl) != inl)
661                         {
662                         BIO_printf(bio_err,"error writing output file\n");
663                         goto end;
664                         }
665                 }
666         if (!BIO_flush(wbio))
667                 {
668                 BIO_printf(bio_err,"bad decrypt\n");
669                 goto end;
670                 }
671
672         ret=0;
673         if (verbose)
674                 {
675                 BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
676                 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
677                 }
678 end:
679         ERR_print_errors(bio_err);
680         if (strbuf != NULL) OPENSSL_free(strbuf);
681         if (buff != NULL) OPENSSL_free(buff);
682         if (in != NULL) BIO_free(in);
683         if (out != NULL) BIO_free_all(out);
684         if (benc != NULL) BIO_free(benc);
685         if (b64 != NULL) BIO_free(b64);
686 #ifdef ZLIB
687         if (bzl != NULL) BIO_free(bzl);
688 #endif
689         if(pass) OPENSSL_free(pass);
690         apps_shutdown();
691         OPENSSL_EXIT(ret);
692         }
693
694 int set_hex(char *in, unsigned char *out, int size)
695         {
696         int i,n;
697         unsigned char j;
698
699         n=strlen(in);
700         if (n > (size*2))
701                 {
702                 BIO_printf(bio_err,"hex string is too long\n");
703                 return(0);
704                 }
705         memset(out,0,size);
706         for (i=0; i<n; i++)
707                 {
708                 j=(unsigned char)*in;
709                 *(in++)='\0';
710                 if (j == 0) break;
711                 if ((j >= '0') && (j <= '9'))
712                         j-='0';
713                 else if ((j >= 'A') && (j <= 'F'))
714                         j=j-'A'+10;
715                 else if ((j >= 'a') && (j <= 'f'))
716                         j=j-'a'+10;
717                 else
718                         {
719                         BIO_printf(bio_err,"non-hex digit\n");
720                         return(0);
721                         }
722                 if (i&1)
723                         out[i/2]|=j;
724                 else
725                         out[i/2]=(j<<4);
726                 }
727         return(1);
728         }