Initial experimental TLSv1.1 support
[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 #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         }