perlasm: fix symptom-less bugs, missing semicolons and 'my' declarations.
[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         int non_fips_allow = 0;
133
134         apps_startup();
135
136         if (bio_err == NULL)
137                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
138                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
139
140         if (!load_config(bio_err, NULL))
141                 goto end;
142
143         /* first check the program name */
144         program_name(argv[0],pname,sizeof pname);
145         if (strcmp(pname,"base64") == 0)
146                 base64=1;
147 #ifdef ZLIB
148         if (strcmp(pname,"zlib") == 0)
149                 do_zlib=1;
150 #endif
151
152         cipher=EVP_get_cipherbyname(pname);
153 #ifdef ZLIB
154         if (!do_zlib && !base64 && (cipher == NULL)
155                                 && (strcmp(pname,"enc") != 0))
156 #else
157         if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
158 #endif
159                 {
160                 BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
161                 goto bad;
162                 }
163
164         argc--;
165         argv++;
166         while (argc >= 1)
167                 {
168                 if      (strcmp(*argv,"-e") == 0)
169                         enc=1;
170                 else if (strcmp(*argv,"-in") == 0)
171                         {
172                         if (--argc < 1) goto bad;
173                         inf= *(++argv);
174                         }
175                 else if (strcmp(*argv,"-out") == 0)
176                         {
177                         if (--argc < 1) goto bad;
178                         outf= *(++argv);
179                         }
180                 else if (strcmp(*argv,"-pass") == 0)
181                         {
182                         if (--argc < 1) goto bad;
183                         passarg= *(++argv);
184                         }
185 #ifndef OPENSSL_NO_ENGINE
186                 else if (strcmp(*argv,"-engine") == 0)
187                         {
188                         if (--argc < 1) goto bad;
189                         engine= *(++argv);
190                         }
191 #endif
192                 else if (strcmp(*argv,"-d") == 0)
193                         enc=0;
194                 else if (strcmp(*argv,"-p") == 0)
195                         printkey=1;
196                 else if (strcmp(*argv,"-v") == 0)
197                         verbose=1;
198                 else if (strcmp(*argv,"-nopad") == 0)
199                         nopad=1;
200                 else if (strcmp(*argv,"-salt") == 0)
201                         nosalt=0;
202                 else if (strcmp(*argv,"-nosalt") == 0)
203                         nosalt=1;
204                 else if (strcmp(*argv,"-debug") == 0)
205                         debug=1;
206                 else if (strcmp(*argv,"-P") == 0)
207                         printkey=2;
208                 else if (strcmp(*argv,"-A") == 0)
209                         olb64=1;
210                 else if (strcmp(*argv,"-a") == 0)
211                         base64=1;
212                 else if (strcmp(*argv,"-base64") == 0)
213                         base64=1;
214 #ifdef ZLIB
215                 else if (strcmp(*argv,"-z") == 0)
216                         do_zlib=1;
217 #endif
218                 else if (strcmp(*argv,"-bufsize") == 0)
219                         {
220                         if (--argc < 1) goto bad;
221                         bufsize=(unsigned char *)*(++argv);
222                         }
223                 else if (strcmp(*argv,"-k") == 0)
224                         {
225                         if (--argc < 1) goto bad;
226                         str= *(++argv);
227                         }
228                 else if (strcmp(*argv,"-kfile") == 0)
229                         {
230                         static char buf[128];
231                         FILE *infile;
232                         char *file;
233
234                         if (--argc < 1) goto bad;
235                         file= *(++argv);
236                         infile=fopen(file,"r");
237                         if (infile == NULL)
238                                 {
239                                 BIO_printf(bio_err,"unable to read key from '%s'\n",
240                                         file);
241                                 goto bad;
242                                 }
243                         buf[0]='\0';
244                         if (!fgets(buf,sizeof buf,infile))
245                                 {
246                                 BIO_printf(bio_err,"unable to read key from '%s'\n",
247                                         file);
248                                 goto bad;
249                                 }
250                         fclose(infile);
251                         i=strlen(buf);
252                         if ((i > 0) &&
253                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
254                                 buf[--i]='\0';
255                         if ((i > 0) &&
256                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
257                                 buf[--i]='\0';
258                         if (i < 1)
259                                 {
260                                 BIO_printf(bio_err,"zero length password\n");
261                                 goto bad;
262                                 }
263                         str=buf;
264                         }
265                 else if (strcmp(*argv,"-K") == 0)
266                         {
267                         if (--argc < 1) goto bad;
268                         hkey= *(++argv);
269                         }
270                 else if (strcmp(*argv,"-S") == 0)
271                         {
272                         if (--argc < 1) goto bad;
273                         hsalt= *(++argv);
274                         }
275                 else if (strcmp(*argv,"-iv") == 0)
276                         {
277                         if (--argc < 1) goto bad;
278                         hiv= *(++argv);
279                         }
280                 else if (strcmp(*argv,"-md") == 0)
281                         {
282                         if (--argc < 1) goto bad;
283                         md= *(++argv);
284                         }
285                 else if (strcmp(*argv,"-non-fips-allow") == 0)
286                         non_fips_allow = 1;
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         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 #ifndef OPENSSL_NO_SETVBUF_IONBF
400                 if (bufsize != NULL)
401                         setvbuf(stdin, (char *)NULL, _IONBF, 0);
402 #endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
403                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
404                 }
405         else
406                 {
407                 if (BIO_read_filename(in,inf) <= 0)
408                         {
409                         perror(inf);
410                         goto end;
411                         }
412                 }
413
414         if(!str && passarg) {
415                 if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
416                         BIO_printf(bio_err, "Error getting password\n");
417                         goto end;
418                 }
419                 str = pass;
420         }
421
422         if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
423                 {
424                 for (;;)
425                         {
426                         char buf[200];
427
428                         BIO_snprintf(buf,sizeof buf,"enter %s %s password:",
429                                      OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
430                                      (enc)?"encryption":"decryption");
431                         strbuf[0]='\0';
432                         i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
433                         if (i == 0)
434                                 {
435                                 if (strbuf[0] == '\0')
436                                         {
437                                         ret=1;
438                                         goto end;
439                                         }
440                                 str=strbuf;
441                                 break;
442                                 }
443                         if (i < 0)
444                                 {
445                                 BIO_printf(bio_err,"bad password read\n");
446                                 goto end;
447                                 }
448                         }
449                 }
450
451
452         if (outf == NULL)
453                 {
454                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
455 #ifndef OPENSSL_NO_SETVBUF_IONBF
456                 if (bufsize != NULL)
457                         setvbuf(stdout, (char *)NULL, _IONBF, 0);
458 #endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
459 #ifdef OPENSSL_SYS_VMS
460                 {
461                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
462                 out = BIO_push(tmpbio, out);
463                 }
464 #endif
465                 }
466         else
467                 {
468                 if (BIO_write_filename(out,outf) <= 0)
469                         {
470                         perror(outf);
471                         goto end;
472                         }
473                 }
474
475         rbio=in;
476         wbio=out;
477
478 #ifdef ZLIB
479
480         if (do_zlib)
481                 {
482                 if ((bzl=BIO_new(BIO_f_zlib())) == NULL)
483                         goto end;
484                 if (enc)
485                         wbio=BIO_push(bzl,wbio);
486                 else
487                         rbio=BIO_push(bzl,rbio);
488                 }
489 #endif
490
491         if (base64)
492                 {
493                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
494                         goto end;
495                 if (debug)
496                         {
497                         BIO_set_callback(b64,BIO_debug_callback);
498                         BIO_set_callback_arg(b64,(char *)bio_err);
499                         }
500                 if (olb64)
501                         BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
502                 if (enc)
503                         wbio=BIO_push(b64,wbio);
504                 else
505                         rbio=BIO_push(b64,rbio);
506                 }
507
508         if (cipher != NULL)
509                 {
510                 /* Note that str is NULL if a key was passed on the command
511                  * line, so we get no salt in that case. Is this a bug?
512                  */
513                 if (str != NULL)
514                         {
515                         /* Salt handling: if encrypting generate a salt and
516                          * write to output BIO. If decrypting read salt from
517                          * input BIO.
518                          */
519                         unsigned char *sptr;
520                         if(nosalt) sptr = NULL;
521                         else {
522                                 if(enc) {
523                                         if(hsalt) {
524                                                 if(!set_hex(hsalt,salt,sizeof salt)) {
525                                                         BIO_printf(bio_err,
526                                                                 "invalid hex salt value\n");
527                                                         goto end;
528                                                 }
529                                         } else if (RAND_pseudo_bytes(salt, sizeof salt) < 0)
530                                                 goto end;
531                                         /* If -P option then don't bother writing */
532                                         if((printkey != 2)
533                                            && (BIO_write(wbio,magic,
534                                                          sizeof magic-1) != sizeof magic-1
535                                                || BIO_write(wbio,
536                                                             (char *)salt,
537                                                             sizeof salt) != sizeof salt)) {
538                                                 BIO_printf(bio_err,"error writing output file\n");
539                                                 goto end;
540                                         }
541                                 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
542                                           || BIO_read(rbio,
543                                                       (unsigned char *)salt,
544                                     sizeof salt) != sizeof salt) {
545                                         BIO_printf(bio_err,"error reading input file\n");
546                                         goto end;
547                                 } else if(memcmp(mbuf,magic,sizeof magic-1)) {
548                                     BIO_printf(bio_err,"bad magic number\n");
549                                     goto end;
550                                 }
551
552                                 sptr = salt;
553                         }
554
555                         if (!EVP_BytesToKey(cipher,dgst,sptr,
556                                             (unsigned char *)str,
557                                             strlen(str),1,key,iv))
558                                 {
559                                 BIO_printf(bio_err, "EVP_BytesToKey failed\n");
560                                 goto end;
561                                 }
562                         /* zero the complete buffer or the string
563                          * passed from the command line
564                          * bug picked up by
565                          * Larry J. Hughes Jr. <hughes@indiana.edu> */
566                         if (str == strbuf)
567                                 OPENSSL_cleanse(str,SIZE);
568                         else
569                                 OPENSSL_cleanse(str,strlen(str));
570                         }
571                 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv))
572                         {
573                         BIO_printf(bio_err,"invalid hex iv value\n");
574                         goto end;
575                         }
576                 if ((hiv == NULL) && (str == NULL)
577                     && EVP_CIPHER_iv_length(cipher) != 0)
578                         {
579                         /* No IV was explicitly set and no IV was generated
580                          * during EVP_BytesToKey. Hence the IV is undefined,
581                          * making correct decryption impossible. */
582                         BIO_printf(bio_err, "iv undefined\n");
583                         goto end;
584                         }
585                 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key))
586                         {
587                         BIO_printf(bio_err,"invalid hex key value\n");
588                         goto end;
589                         }
590
591                 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
592                         goto end;
593
594                 /* Since we may be changing parameters work on the encryption
595                  * context rather than calling BIO_set_cipher().
596                  */
597
598                 BIO_get_cipher_ctx(benc, &ctx);
599
600                 if (non_fips_allow)
601                         EVP_CIPHER_CTX_set_flags(ctx,
602                                 EVP_CIPH_FLAG_NON_FIPS_ALLOW);
603
604                 if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc))
605                         {
606                         BIO_printf(bio_err, "Error setting cipher %s\n",
607                                 EVP_CIPHER_name(cipher));
608                         ERR_print_errors(bio_err);
609                         goto end;
610                         }
611
612                 if (nopad)
613                         EVP_CIPHER_CTX_set_padding(ctx, 0);
614
615                 if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc))
616                         {
617                         BIO_printf(bio_err, "Error setting cipher %s\n",
618                                 EVP_CIPHER_name(cipher));
619                         ERR_print_errors(bio_err);
620                         goto end;
621                         }
622
623                 if (debug)
624                         {
625                         BIO_set_callback(benc,BIO_debug_callback);
626                         BIO_set_callback_arg(benc,(char *)bio_err);
627                         }
628
629                 if (printkey)
630                         {
631                         if (!nosalt)
632                                 {
633                                 printf("salt=");
634                                 for (i=0; i<(int)sizeof(salt); i++)
635                                         printf("%02X",salt[i]);
636                                 printf("\n");
637                                 }
638                         if (cipher->key_len > 0)
639                                 {
640                                 printf("key=");
641                                 for (i=0; i<cipher->key_len; i++)
642                                         printf("%02X",key[i]);
643                                 printf("\n");
644                                 }
645                         if (cipher->iv_len > 0)
646                                 {
647                                 printf("iv =");
648                                 for (i=0; i<cipher->iv_len; i++)
649                                         printf("%02X",iv[i]);
650                                 printf("\n");
651                                 }
652                         if (printkey == 2)
653                                 {
654                                 ret=0;
655                                 goto end;
656                                 }
657                         }
658                 }
659
660         /* Only encrypt/decrypt as we write the file */
661         if (benc != NULL)
662                 wbio=BIO_push(benc,wbio);
663
664         for (;;)
665                 {
666                 inl=BIO_read(rbio,(char *)buff,bsize);
667                 if (inl <= 0) break;
668                 if (BIO_write(wbio,(char *)buff,inl) != inl)
669                         {
670                         BIO_printf(bio_err,"error writing output file\n");
671                         goto end;
672                         }
673                 }
674         if (!BIO_flush(wbio))
675                 {
676                 BIO_printf(bio_err,"bad decrypt\n");
677                 goto end;
678                 }
679
680         ret=0;
681         if (verbose)
682                 {
683                 BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
684                 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
685                 }
686 end:
687         ERR_print_errors(bio_err);
688         if (strbuf != NULL) OPENSSL_free(strbuf);
689         if (buff != NULL) OPENSSL_free(buff);
690         if (in != NULL) BIO_free(in);
691         if (out != NULL) BIO_free_all(out);
692         if (benc != NULL) BIO_free(benc);
693         if (b64 != NULL) BIO_free(b64);
694 #ifdef ZLIB
695         if (bzl != NULL) BIO_free(bzl);
696 #endif
697         if(pass) OPENSSL_free(pass);
698         apps_shutdown();
699         OPENSSL_EXIT(ret);
700         }
701
702 int set_hex(char *in, unsigned char *out, int size)
703         {
704         int i,n;
705         unsigned char j;
706
707         n=strlen(in);
708         if (n > (size*2))
709                 {
710                 BIO_printf(bio_err,"hex string is too long\n");
711                 return(0);
712                 }
713         memset(out,0,size);
714         for (i=0; i<n; i++)
715                 {
716                 j=(unsigned char)*in;
717                 *(in++)='\0';
718                 if (j == 0) break;
719                 if ((j >= '0') && (j <= '9'))
720                         j-='0';
721                 else if ((j >= 'A') && (j <= 'F'))
722                         j=j-'A'+10;
723                 else if ((j >= 'a') && (j <= 'f'))
724                         j=j-'a'+10;
725                 else
726                         {
727                         BIO_printf(bio_err,"non-hex digit\n");
728                         return(0);
729                         }
730                 if (i&1)
731                         out[i/2]|=j;
732                 else
733                         out[i/2]=(j<<4);
734                 }
735         return(1);
736         }