const fixes
[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 <ctype.h>
71
72 int set_hex(char *in,unsigned char *out,int size);
73 #undef SIZE
74 #undef BSIZE
75 #undef PROG
76
77 #define SIZE    (512)
78 #define BSIZE   (8*1024)
79 #define PROG    enc_main
80
81 static void show_ciphers(const OBJ_NAME *name,void *bio_)
82         {
83         BIO *bio=bio_;
84         static int n;
85
86         if(!islower((unsigned char)*name->name))
87                 return;
88
89         BIO_printf(bio,"-%-25s",name->name);
90         if(++n == 3)
91                 {
92                 BIO_printf(bio,"\n");
93                 n=0;
94                 }
95         else
96                 BIO_printf(bio," ");
97         }
98
99 int MAIN(int, char **);
100
101 int MAIN(int argc, char **argv)
102         {
103 #ifndef OPENSSL_NO_ENGINE
104         ENGINE *e = NULL;
105 #endif
106         static const char magic[]="Salted__";
107         char mbuf[sizeof magic-1];
108         char *strbuf=NULL;
109         unsigned char *buff=NULL,*bufsize=NULL;
110         int bsize=BSIZE,verbose=0;
111         int ret=1,inl;
112         int nopad = 0;
113         unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH];
114         unsigned char salt[PKCS5_SALT_LEN];
115         char *str=NULL, *passarg = NULL, *pass = NULL;
116         char *hkey=NULL,*hiv=NULL,*hsalt = NULL;
117         int enc=1,printkey=0,i,base64=0;
118         int debug=0,olb64=0,nosalt=0;
119         const EVP_CIPHER *cipher=NULL,*c;
120         char *inf=NULL,*outf=NULL;
121         BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
122 #define PROG_NAME_SIZE  39
123         char pname[PROG_NAME_SIZE+1];
124 #ifndef OPENSSL_NO_ENGINE
125         char *engine = NULL;
126 #endif
127
128         apps_startup();
129
130         if (bio_err == NULL)
131                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
132                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
133
134         if (!load_config(bio_err, NULL))
135                 goto end;
136
137         /* first check the program name */
138         program_name(argv[0],pname,sizeof pname);
139         if (strcmp(pname,"base64") == 0)
140                 base64=1;
141
142         cipher=EVP_get_cipherbyname(pname);
143         if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
144                 {
145                 BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
146                 goto bad;
147                 }
148
149         argc--;
150         argv++;
151         while (argc >= 1)
152                 {
153                 if      (strcmp(*argv,"-e") == 0)
154                         enc=1;
155                 else if (strcmp(*argv,"-in") == 0)
156                         {
157                         if (--argc < 1) goto bad;
158                         inf= *(++argv);
159                         }
160                 else if (strcmp(*argv,"-out") == 0)
161                         {
162                         if (--argc < 1) goto bad;
163                         outf= *(++argv);
164                         }
165                 else if (strcmp(*argv,"-pass") == 0)
166                         {
167                         if (--argc < 1) goto bad;
168                         passarg= *(++argv);
169                         }
170 #ifndef OPENSSL_NO_ENGINE
171                 else if (strcmp(*argv,"-engine") == 0)
172                         {
173                         if (--argc < 1) goto bad;
174                         engine= *(++argv);
175                         }
176 #endif
177                 else if (strcmp(*argv,"-d") == 0)
178                         enc=0;
179                 else if (strcmp(*argv,"-p") == 0)
180                         printkey=1;
181                 else if (strcmp(*argv,"-v") == 0)
182                         verbose=1;
183                 else if (strcmp(*argv,"-nopad") == 0)
184                         nopad=1;
185                 else if (strcmp(*argv,"-salt") == 0)
186                         nosalt=0;
187                 else if (strcmp(*argv,"-nosalt") == 0)
188                         nosalt=1;
189                 else if (strcmp(*argv,"-debug") == 0)
190                         debug=1;
191                 else if (strcmp(*argv,"-P") == 0)
192                         printkey=2;
193                 else if (strcmp(*argv,"-A") == 0)
194                         olb64=1;
195                 else if (strcmp(*argv,"-a") == 0)
196                         base64=1;
197                 else if (strcmp(*argv,"-base64") == 0)
198                         base64=1;
199                 else if (strcmp(*argv,"-bufsize") == 0)
200                         {
201                         if (--argc < 1) goto bad;
202                         bufsize=(unsigned char *)*(++argv);
203                         }
204                 else if (strcmp(*argv,"-k") == 0)
205                         {
206                         if (--argc < 1) goto bad;
207                         str= *(++argv);
208                         }
209                 else if (strcmp(*argv,"-kfile") == 0)
210                         {
211                         static char buf[128];
212                         FILE *infile;
213                         char *file;
214
215                         if (--argc < 1) goto bad;
216                         file= *(++argv);
217                         infile=fopen(file,"r");
218                         if (infile == NULL)
219                                 {
220                                 BIO_printf(bio_err,"unable to read key from '%s'\n",
221                                         file);
222                                 goto bad;
223                                 }
224                         buf[0]='\0';
225                         fgets(buf,sizeof buf,infile);
226                         fclose(infile);
227                         i=strlen(buf);
228                         if ((i > 0) &&
229                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
230                                 buf[--i]='\0';
231                         if ((i > 0) &&
232                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
233                                 buf[--i]='\0';
234                         if (i < 1)
235                                 {
236                                 BIO_printf(bio_err,"zero length password\n");
237                                 goto bad;
238                                 }
239                         str=buf;
240                         }
241                 else if (strcmp(*argv,"-K") == 0)
242                         {
243                         if (--argc < 1) goto bad;
244                         hkey= *(++argv);
245                         }
246                 else if (strcmp(*argv,"-S") == 0)
247                         {
248                         if (--argc < 1) goto bad;
249                         hsalt= *(++argv);
250                         }
251                 else if (strcmp(*argv,"-iv") == 0)
252                         {
253                         if (--argc < 1) goto bad;
254                         hiv= *(++argv);
255                         }
256                 else if ((argv[0][0] == '-') &&
257                         ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
258                         {
259                         cipher=c;
260                         }
261                 else if (strcmp(*argv,"-none") == 0)
262                         cipher=NULL;
263                 else
264                         {
265                         BIO_printf(bio_err,"unknown option '%s'\n",*argv);
266 bad:
267                         BIO_printf(bio_err,"options are\n");
268                         BIO_printf(bio_err,"%-14s input file\n","-in <file>");
269                         BIO_printf(bio_err,"%-14s output file\n","-out <file>");
270                         BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>");
271                         BIO_printf(bio_err,"%-14s encrypt\n","-e");
272                         BIO_printf(bio_err,"%-14s decrypt\n","-d");
273                         BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
274                         BIO_printf(bio_err,"%-14s key is the next argument\n","-k");
275                         BIO_printf(bio_err,"%-14s key is the first line of the file argument\n","-kfile");
276                         BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
277                         BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
278                         BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
279 #ifndef OPENSSL_NO_ENGINE
280                         BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e");
281 #endif
282
283                         BIO_printf(bio_err,"Cipher Types\n");
284                         OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
285                                                show_ciphers,
286                                                bio_err);
287                         BIO_printf(bio_err,"\n");
288
289                         goto end;
290                         }
291                 argc--;
292                 argv++;
293                 }
294
295 #ifndef OPENSSL_NO_ENGINE
296         e = setup_engine(bio_err, engine, 0);
297 #endif
298
299         if (bufsize != NULL)
300                 {
301                 unsigned long n;
302
303                 for (n=0; *bufsize; bufsize++)
304                         {
305                         i= *bufsize;
306                         if ((i <= '9') && (i >= '0'))
307                                 n=n*10+i-'0';
308                         else if (i == 'k')
309                                 {
310                                 n*=1024;
311                                 bufsize++;
312                                 break;
313                                 }
314                         }
315                 if (*bufsize != '\0')
316                         {
317                         BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
318                         goto end;
319                         }
320
321                 /* It must be large enough for a base64 encoded line */
322                 if (n < 80) n=80;
323
324                 bsize=(int)n;
325                 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
326                 }
327
328         strbuf=OPENSSL_malloc(SIZE);
329         buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize));
330         if ((buff == NULL) || (strbuf == NULL))
331                 {
332                 BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
333                 goto end;
334                 }
335
336         in=BIO_new(BIO_s_file());
337         out=BIO_new(BIO_s_file());
338         if ((in == NULL) || (out == NULL))
339                 {
340                 ERR_print_errors(bio_err);
341                 goto end;
342                 }
343         if (debug)
344                 {
345                 BIO_set_callback(in,BIO_debug_callback);
346                 BIO_set_callback(out,BIO_debug_callback);
347                 BIO_set_callback_arg(in,bio_err);
348                 BIO_set_callback_arg(out,bio_err);
349                 }
350
351         if (inf == NULL)
352                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
353         else
354                 {
355                 if (BIO_read_filename(in,inf) <= 0)
356                         {
357                         perror(inf);
358                         goto end;
359                         }
360                 }
361
362         if(!str && passarg) {
363                 if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
364                         BIO_printf(bio_err, "Error getting password\n");
365                         goto end;
366                 }
367                 str = pass;
368         }
369
370         if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
371                 {
372                 for (;;)
373                         {
374                         char buf[200];
375
376                         BIO_snprintf(buf,sizeof buf,"enter %s %s password:",
377                                      OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
378                                      (enc)?"encryption":"decryption");
379                         strbuf[0]='\0';
380                         i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
381                         if (i == 0)
382                                 {
383                                 if (strbuf[0] == '\0')
384                                         {
385                                         ret=1;
386                                         goto end;
387                                         }
388                                 str=strbuf;
389                                 break;
390                                 }
391                         if (i < 0)
392                                 {
393                                 BIO_printf(bio_err,"bad password read\n");
394                                 goto end;
395                                 }
396                         }
397                 }
398
399
400         if (outf == NULL)
401                 {
402                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
403 #ifdef OPENSSL_SYS_VMS
404                 {
405                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
406                 out = BIO_push(tmpbio, out);
407                 }
408 #endif
409                 }
410         else
411                 {
412                 if (BIO_write_filename(out,outf) <= 0)
413                         {
414                         perror(outf);
415                         goto end;
416                         }
417                 }
418
419         rbio=in;
420         wbio=out;
421
422         if (base64)
423                 {
424                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
425                         goto end;
426                 if (debug)
427                         {
428                         BIO_set_callback(b64,BIO_debug_callback);
429                         BIO_set_callback_arg(b64,bio_err);
430                         }
431                 if (olb64)
432                         BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
433                 if (enc)
434                         wbio=BIO_push(b64,wbio);
435                 else
436                         rbio=BIO_push(b64,rbio);
437                 }
438
439         if (cipher != NULL)
440                 {
441                 /* Note that str is NULL if a key was passed on the command
442                  * line, so we get no salt in that case. Is this a bug?
443                  */
444                 if (str != NULL)
445                         {
446                         /* Salt handling: if encrypting generate a salt and
447                          * write to output BIO. If decrypting read salt from
448                          * input BIO.
449                          */
450                         unsigned char *sptr;
451                         if(nosalt) sptr = NULL;
452                         else {
453                                 if(enc) {
454                                         if(hsalt) {
455                                                 if(!set_hex(hsalt,salt,sizeof salt)) {
456                                                         BIO_printf(bio_err,
457                                                                 "invalid hex salt value\n");
458                                                         goto end;
459                                                 }
460                                         } else if (RAND_pseudo_bytes(salt, sizeof salt) < 0)
461                                                 goto end;
462                                         /* If -P option then don't bother writing */
463                                         if((printkey != 2)
464                                            && (BIO_write(wbio,magic,
465                                                          sizeof magic-1) != sizeof magic-1
466                                                || BIO_write(wbio,
467                                                             (char *)salt,
468                                                             sizeof salt) != sizeof salt)) {
469                                                 BIO_printf(bio_err,"error writing output file\n");
470                                                 goto end;
471                                         }
472                                 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
473                                           || BIO_read(rbio,
474                                                       (unsigned char *)salt,
475                                     sizeof salt) != sizeof salt) {
476                                         BIO_printf(bio_err,"error reading input file\n");
477                                         goto end;
478                                 } else if(memcmp(mbuf,magic,sizeof magic-1)) {
479                                     BIO_printf(bio_err,"bad magic number\n");
480                                     goto end;
481                                 }
482
483                                 sptr = salt;
484                         }
485
486                         EVP_BytesToKey(cipher,EVP_md5(),sptr,
487                                 (unsigned char *)str,
488                                 strlen(str),1,key,iv);
489                         /* zero the complete buffer or the string
490                          * passed from the command line
491                          * bug picked up by
492                          * Larry J. Hughes Jr. <hughes@indiana.edu> */
493                         if (str == strbuf)
494                                 OPENSSL_cleanse(str,SIZE);
495                         else
496                                 OPENSSL_cleanse(str,strlen(str));
497                         }
498                 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv))
499                         {
500                         BIO_printf(bio_err,"invalid hex iv value\n");
501                         goto end;
502                         }
503                 if ((hiv == NULL) && (str == NULL))
504                         {
505                         /* No IV was explicitly set and no IV was generated
506                          * during EVP_BytesToKey. Hence the IV is undefined,
507                          * making correct decryption impossible. */
508                         BIO_printf(bio_err, "iv undefined\n");
509                         goto end;
510                         }
511                 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key))
512                         {
513                         BIO_printf(bio_err,"invalid hex key value\n");
514                         goto end;
515                         }
516
517                 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
518                         goto end;
519                 BIO_set_cipher(benc,cipher,key,iv,enc);
520                 if (nopad)
521                         {
522                         EVP_CIPHER_CTX *ctx;
523                         BIO_get_cipher_ctx(benc, &ctx);
524                         EVP_CIPHER_CTX_set_padding(ctx, 0);
525                         }
526                 if (debug)
527                         {
528                         BIO_set_callback(benc,BIO_debug_callback);
529                         BIO_set_callback_arg(benc,bio_err);
530                         }
531
532                 if (printkey)
533                         {
534                         if (!nosalt)
535                                 {
536                                 printf("salt=");
537                                 for (i=0; i<(int)sizeof(salt); i++)
538                                         printf("%02X",salt[i]);
539                                 printf("\n");
540                                 }
541                         if (cipher->key_len > 0)
542                                 {
543                                 printf("key=");
544                                 for (i=0; i<cipher->key_len; i++)
545                                         printf("%02X",key[i]);
546                                 printf("\n");
547                                 }
548                         if (cipher->iv_len > 0)
549                                 {
550                                 printf("iv =");
551                                 for (i=0; i<cipher->iv_len; i++)
552                                         printf("%02X",iv[i]);
553                                 printf("\n");
554                                 }
555                         if (printkey == 2)
556                                 {
557                                 ret=0;
558                                 goto end;
559                                 }
560                         }
561                 }
562
563         /* Only encrypt/decrypt as we write the file */
564         if (benc != NULL)
565                 wbio=BIO_push(benc,wbio);
566
567         for (;;)
568                 {
569                 inl=BIO_read(rbio,(char *)buff,bsize);
570                 if (inl <= 0) break;
571                 if (BIO_write(wbio,(char *)buff,inl) != inl)
572                         {
573                         BIO_printf(bio_err,"error writing output file\n");
574                         goto end;
575                         }
576                 }
577         if (!BIO_flush(wbio))
578                 {
579                 BIO_printf(bio_err,"bad decrypt\n");
580                 goto end;
581                 }
582
583         ret=0;
584         if (verbose)
585                 {
586                 BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
587                 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
588                 }
589 end:
590         ERR_print_errors(bio_err);
591         if (strbuf != NULL) OPENSSL_free(strbuf);
592         if (buff != NULL) OPENSSL_free(buff);
593         if (in != NULL) BIO_free(in);
594         if (out != NULL) BIO_free_all(out);
595         if (benc != NULL) BIO_free(benc);
596         if (b64 != NULL) BIO_free(b64);
597         if(pass) OPENSSL_free(pass);
598         apps_shutdown();
599         OPENSSL_EXIT(ret);
600         }
601
602 int set_hex(char *in, unsigned char *out, int size)
603         {
604         int i,n;
605         unsigned char j;
606
607         n=strlen(in);
608         if (n > (size*2))
609                 {
610                 BIO_printf(bio_err,"hex string is too long\n");
611                 return(0);
612                 }
613         memset(out,0,size);
614         for (i=0; i<n; i++)
615                 {
616                 j=(unsigned char)*in;
617                 *(in++)='\0';
618                 if (j == 0) break;
619                 if ((j >= '0') && (j <= '9'))
620                         j-='0';
621                 else if ((j >= 'A') && (j <= 'F'))
622                         j=j-'A'+10;
623                 else if ((j >= 'a') && (j <= 'f'))
624                         j=j-'a'+10;
625                 else
626                         {
627                         BIO_printf(bio_err,"non-hex digit\n");
628                         return(0);
629                         }
630                 if (i&1)
631                         out[i/2]|=j;
632                 else
633                         out[i/2]=(j<<4);
634                 }
635         return(1);
636         }