387cfe2f19a3900c6c8a8ad4dfeefa2d0033020a
[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 #ifndef NO_MD5
70 #include <openssl/md5.h>
71 #endif
72 #include <openssl/pem.h>
73
74 int set_hex(char *in,unsigned char *out,int size);
75 #undef SIZE
76 #undef BSIZE
77 #undef PROG
78
79 #define SIZE    (512)
80 #define BSIZE   (8*1024)
81 #define PROG    enc_main
82
83 int MAIN(int, char **);
84
85 int MAIN(int argc, char **argv)
86         {
87         static const char magic[]="Salted__";
88         char mbuf[8];   /* should be 1 smaller than magic */
89         char *strbuf=NULL;
90         unsigned char *buff=NULL,*bufsize=NULL;
91         int bsize=BSIZE,verbose=0;
92         int ret=1,inl;
93         unsigned char key[24],iv[MD5_DIGEST_LENGTH];
94         unsigned char salt[PKCS5_SALT_LEN];
95         char *str=NULL;
96         char *hkey=NULL,*hiv=NULL,*hsalt = NULL;
97         int enc=1,printkey=0,i,base64=0;
98         int debug=0,olb64=0,nosalt=0;
99         const EVP_CIPHER *cipher=NULL,*c;
100         char *inf=NULL,*outf=NULL;
101         BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
102 #define PROG_NAME_SIZE  16
103         char pname[PROG_NAME_SIZE];
104
105         apps_startup();
106
107         if (bio_err == NULL)
108                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
109                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
110
111         /* first check the program name */
112         program_name(argv[0],pname,PROG_NAME_SIZE);
113         if (strcmp(pname,"base64") == 0)
114                 base64=1;
115
116         cipher=EVP_get_cipherbyname(pname);
117         if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
118                 {
119                 BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
120                 goto bad;
121                 }
122
123         argc--;
124         argv++;
125         while (argc >= 1)
126                 {
127                 if      (strcmp(*argv,"-e") == 0)
128                         enc=1;
129                 else if (strcmp(*argv,"-in") == 0)
130                         {
131                         if (--argc < 1) goto bad;
132                         inf= *(++argv);
133                         }
134                 else if (strcmp(*argv,"-out") == 0)
135                         {
136                         if (--argc < 1) goto bad;
137                         outf= *(++argv);
138                         }
139                 else if (strcmp(*argv,"-d") == 0)
140                         enc=0;
141                 else if (strcmp(*argv,"-p") == 0)
142                         printkey=1;
143                 else if (strcmp(*argv,"-v") == 0)
144                         verbose=1;
145                 else if (strcmp(*argv,"-salt") == 0)
146                         nosalt=0;
147                 else if (strcmp(*argv,"-nosalt") == 0)
148                         nosalt=1;
149                 else if (strcmp(*argv,"-debug") == 0)
150                         debug=1;
151                 else if (strcmp(*argv,"-P") == 0)
152                         printkey=2;
153                 else if (strcmp(*argv,"-A") == 0)
154                         olb64=1;
155                 else if (strcmp(*argv,"-a") == 0)
156                         base64=1;
157                 else if (strcmp(*argv,"-base64") == 0)
158                         base64=1;
159                 else if (strcmp(*argv,"-bufsize") == 0)
160                         {
161                         if (--argc < 1) goto bad;
162                         bufsize=(unsigned char *)*(++argv);
163                         }
164                 else if (strcmp(*argv,"-k") == 0)
165                         {
166                         if (--argc < 1) goto bad;
167                         str= *(++argv);
168                         }
169                 else if (strcmp(*argv,"-kfile") == 0)
170                         {
171                         static char buf[128];
172                         FILE *infile;
173                         char *file;
174
175                         if (--argc < 1) goto bad;
176                         file= *(++argv);
177                         infile=fopen(file,"r");
178                         if (infile == NULL)
179                                 {
180                                 BIO_printf(bio_err,"unable to read key from '%s'\n",
181                                         file);
182                                 goto bad;
183                                 }
184                         buf[0]='\0';
185                         fgets(buf,128,infile);
186                         fclose(infile);
187                         i=strlen(buf);
188                         if ((i > 0) &&
189                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
190                                 buf[--i]='\0';
191                         if ((i > 0) &&
192                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
193                                 buf[--i]='\0';
194                         if (i < 1)
195                                 {
196                                 BIO_printf(bio_err,"zero length password\n");
197                                 goto bad;
198                                 }
199                         str=buf;
200                         }
201                 else if (strcmp(*argv,"-K") == 0)
202                         {
203                         if (--argc < 1) goto bad;
204                         hkey= *(++argv);
205                         }
206                 else if (strcmp(*argv,"-S") == 0)
207                         {
208                         if (--argc < 1) goto bad;
209                         hsalt= *(++argv);
210                         }
211                 else if (strcmp(*argv,"-iv") == 0)
212                         {
213                         if (--argc < 1) goto bad;
214                         hiv= *(++argv);
215                         }
216                 else if ((argv[0][0] == '-') &&
217                         ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
218                         {
219                         cipher=c;
220                         }
221                 else if (strcmp(*argv,"-none") == 0)
222                         cipher=NULL;
223                 else
224                         {
225                         BIO_printf(bio_err,"unknown option '%s'\n",*argv);
226 bad:
227                         BIO_printf(bio_err,"options are\n");
228                         BIO_printf(bio_err,"%-14s input file\n","-in <file>");
229                         BIO_printf(bio_err,"%-14s output fileencrypt\n","-out <file>");
230                         BIO_printf(bio_err,"%-14s encrypt\n","-e");
231                         BIO_printf(bio_err,"%-14s decrypt\n","-d");
232                         BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
233                         BIO_printf(bio_err,"%-14s key is the next argument\n","-k");
234                         BIO_printf(bio_err,"%-14s key is the first line of the file argument\n","-kfile");
235                         BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
236                         BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
237                         BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
238
239                         BIO_printf(bio_err,"Cipher Types\n");
240                         BIO_printf(bio_err,"des     : 56 bit key DES encryption\n");
241                         BIO_printf(bio_err,"des_ede :112 bit key ede DES encryption\n");
242                         BIO_printf(bio_err,"des_ede3:168 bit key ede DES encryption\n");
243 #ifndef NO_IDEA
244                         BIO_printf(bio_err,"idea    :128 bit key IDEA encryption\n");
245 #endif
246 #ifndef NO_RC4
247                         BIO_printf(bio_err,"rc2     :128 bit key RC2 encryption\n");
248 #endif
249 #ifndef NO_BF
250                         BIO_printf(bio_err,"bf      :128 bit key Blowfish encryption\n");
251 #endif
252 #ifndef NO_RC4
253                         BIO_printf(bio_err," -%-5s :128 bit key RC4 encryption\n",
254                                 LN_rc4);
255 #endif
256
257                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
258                                 LN_des_ecb,LN_des_cbc,
259                                 LN_des_cfb64,LN_des_ofb64);
260                         BIO_printf(bio_err," -%-4s (%s)\n",
261                                 "des", LN_des_cbc);
262
263                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
264                                 LN_des_ede,LN_des_ede_cbc,
265                                 LN_des_ede_cfb64,LN_des_ede_ofb64);
266                         BIO_printf(bio_err," -desx -none\n");
267
268
269                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
270                                 LN_des_ede3,LN_des_ede3_cbc,
271                                 LN_des_ede3_cfb64,LN_des_ede3_ofb64);
272                         BIO_printf(bio_err," -%-4s (%s)\n",
273                                 "des3", LN_des_ede3_cbc);
274
275 #ifndef NO_IDEA
276                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
277                                 LN_idea_ecb, LN_idea_cbc,
278                                 LN_idea_cfb64, LN_idea_ofb64);
279                         BIO_printf(bio_err," -%-4s (%s)\n","idea",LN_idea_cbc);
280 #endif
281 #ifndef NO_RC2
282                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
283                                 LN_rc2_ecb, LN_rc2_cbc,
284                                 LN_rc2_cfb64, LN_rc2_ofb64);
285                         BIO_printf(bio_err," -%-4s (%s)\n","rc2", LN_rc2_cbc);
286 #endif
287 #ifndef NO_BF
288                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
289                                 LN_bf_ecb, LN_bf_cbc,
290                                 LN_bf_cfb64, LN_bf_ofb64);
291                         BIO_printf(bio_err," -%-4s (%s)\n","bf", LN_bf_cbc);
292 #endif
293 #ifndef NO_CAST
294                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
295                                 LN_cast5_ecb, LN_cast5_cbc,
296                                 LN_cast5_cfb64, LN_cast5_ofb64);
297                         BIO_printf(bio_err," -%-4s (%s)\n","cast", LN_cast5_cbc);
298 #endif
299 #ifndef NO_RC5
300                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
301                                 LN_rc5_ecb, LN_rc5_cbc,
302                                 LN_rc5_cfb64, LN_rc5_ofb64);
303                         BIO_printf(bio_err," -%-4s (%s)\n","rc5", LN_rc5_cbc);
304 #endif
305                         goto end;
306                         }
307                 argc--;
308                 argv++;
309                 }
310
311         if (bufsize != NULL)
312                 {
313                 unsigned long n;
314
315                 for (n=0; *bufsize; bufsize++)
316                         {
317                         i= *bufsize;
318                         if ((i <= '9') && (i >= '0'))
319                                 n=n*10+i-'0';
320                         else if (i == 'k')
321                                 {
322                                 n*=1024;
323                                 bufsize++;
324                                 break;
325                                 }
326                         }
327                 if (*bufsize != '\0')
328                         {
329                         BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
330                         goto end;
331                         }
332
333                 /* It must be large enough for a base64 encoded line */
334                 if (n < 80) n=80;
335
336                 bsize=(int)n;
337                 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
338                 }
339
340         strbuf=Malloc(SIZE);
341         buff=(unsigned char *)Malloc(EVP_ENCODE_LENGTH(bsize));
342         if ((buff == NULL) || (strbuf == NULL))
343                 {
344                 BIO_printf(bio_err,"Malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
345                 goto end;
346                 }
347
348         in=BIO_new(BIO_s_file());
349         out=BIO_new(BIO_s_file());
350         if ((in == NULL) || (out == NULL))
351                 {
352                 ERR_print_errors(bio_err);
353                 goto end;
354                 }
355         if (debug)
356                 {
357                 BIO_set_callback(in,BIO_debug_callback);
358                 BIO_set_callback(out,BIO_debug_callback);
359                 BIO_set_callback_arg(in,bio_err);
360                 BIO_set_callback_arg(out,bio_err);
361                 }
362
363         if (inf == NULL)
364                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
365         else
366                 {
367                 if (BIO_read_filename(in,inf) <= 0)
368                         {
369                         perror(inf);
370                         goto end;
371                         }
372                 }
373
374         if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
375                 {
376                 for (;;)
377                         {
378                         char buf[200];
379
380                         sprintf(buf,"enter %s %s password:",
381                                 OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
382                                 (enc)?"encryption":"decryption");
383                         strbuf[0]='\0';
384                         i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
385                         if (i == 0)
386                                 {
387                                 if (strbuf[0] == '\0')
388                                         {
389                                         ret=1;
390                                         goto end;
391                                         }
392                                 str=strbuf;
393                                 break;
394                                 }
395                         if (i < 0)
396                                 {
397                                 BIO_printf(bio_err,"bad password read\n");
398                                 goto end;
399                                 }
400                         }
401                 }
402
403
404         if (outf == NULL)
405                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
406         else
407                 {
408                 if (BIO_write_filename(out,outf) <= 0)
409                         {
410                         perror(outf);
411                         goto end;
412                         }
413                 }
414
415         rbio=in;
416         wbio=out;
417
418         if (base64)
419                 {
420                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
421                         goto end;
422                 if (debug)
423                         {
424                         BIO_set_callback(b64,BIO_debug_callback);
425                         BIO_set_callback_arg(b64,bio_err);
426                         }
427                 if (olb64)
428                         BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
429                 if (enc)
430                         wbio=BIO_push(b64,wbio);
431                 else
432                         rbio=BIO_push(b64,rbio);
433                 }
434
435         if (cipher != NULL)
436                 {
437                 if (str != NULL)
438                         {
439                         /* Salt handling: if encrypting generate a salt and
440                          * write to output BIO. If decrypting read salt from
441                          * input BIO.
442                          */
443                         unsigned char *sptr;
444                         if(nosalt) sptr = NULL;
445                         else {
446                                 if(enc) {
447                                         if(hsalt) {
448                                                 if(!set_hex(hsalt,salt,PKCS5_SALT_LEN)) {
449                                                         BIO_printf(bio_err,
450                                                                 "invalid hex salt value\n");
451                                                         goto end;
452                                                 }
453                                         } else if (RAND_pseudo_bytes(salt, PKCS5_SALT_LEN) < 0)
454                                                 goto end;
455                                         /* If -P option then don't bother writing */
456                                         if((printkey != 2)
457                                            && (BIO_write(wbio,magic,
458                                                          sizeof magic-1) != sizeof magic-1
459                                                || BIO_write(wbio,
460                                                             (char *)salt,
461                                                             PKCS5_SALT_LEN) != PKCS5_SALT_LEN)) {
462                                                 BIO_printf(bio_err,"error writing output file\n");
463                                                 goto end;
464                                         }
465                                 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
466                                           || BIO_read(rbio,
467                                                       (unsigned char *)salt,
468                                     PKCS5_SALT_LEN) != PKCS5_SALT_LEN) {
469                                         BIO_printf(bio_err,"error reading input file\n");
470                                         goto end;
471                                 } else if(memcmp(mbuf,magic,sizeof magic-1)) {
472                                     BIO_printf(bio_err,"bad magic number\n");
473                                     goto end;
474                                 }
475
476                                 sptr = salt;
477                         }
478
479                         EVP_BytesToKey(cipher,EVP_md5(),sptr,
480                                 (unsigned char *)str,
481                                 strlen(str),1,key,iv);
482                         /* zero the complete buffer or the string
483                          * passed from the command line
484                          * bug picked up by
485                          * Larry J. Hughes Jr. <hughes@indiana.edu> */
486                         if (str == strbuf)
487                                 memset(str,0,SIZE);
488                         else
489                                 memset(str,0,strlen(str));
490                         }
491                 if ((hiv != NULL) && !set_hex(hiv,iv,8))
492                         {
493                         BIO_printf(bio_err,"invalid hex iv value\n");
494                         goto end;
495                         }
496                 if ((hkey != NULL) && !set_hex(hkey,key,24))
497                         {
498                         BIO_printf(bio_err,"invalid hex key value\n");
499                         goto end;
500                         }
501
502                 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
503                         goto end;
504                 BIO_set_cipher(benc,cipher,key,iv,enc);
505                 if (debug)
506                         {
507                         BIO_set_callback(benc,BIO_debug_callback);
508                         BIO_set_callback_arg(benc,bio_err);
509                         }
510
511                 if (printkey)
512                         {
513                         if (!nosalt)
514                                 {
515                                 printf("salt=");
516                                 for (i=0; i<PKCS5_SALT_LEN; i++)
517                                         printf("%02X",salt[i]);
518                                 printf("\n");
519                                 }
520                         if (cipher->key_len > 0)
521                                 {
522                                 printf("key=");
523                                 for (i=0; i<cipher->key_len; i++)
524                                         printf("%02X",key[i]);
525                                 printf("\n");
526                                 }
527                         if (cipher->iv_len > 0)
528                                 {
529                                 printf("iv =");
530                                 for (i=0; i<cipher->iv_len; i++)
531                                         printf("%02X",iv[i]);
532                                 printf("\n");
533                                 }
534                         if (printkey == 2)
535                                 {
536                                 ret=0;
537                                 goto end;
538                                 }
539                         }
540                 }
541
542         /* Only encrypt/decrypt as we write the file */
543         if (benc != NULL)
544                 wbio=BIO_push(benc,wbio);
545
546         for (;;)
547                 {
548                 inl=BIO_read(rbio,(char *)buff,bsize);
549                 if (inl <= 0) break;
550                 if (BIO_write(wbio,(char *)buff,inl) != inl)
551                         {
552                         BIO_printf(bio_err,"error writing output file\n");
553                         goto end;
554                         }
555                 }
556         if (!BIO_flush(wbio))
557                 {
558                 BIO_printf(bio_err,"bad decrypt\n");
559                 goto end;
560                 }
561
562         ret=0;
563         if (verbose)
564                 {
565                 BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
566                 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
567                 }
568 end:
569         ERR_print_errors(bio_err);
570         if (strbuf != NULL) Free(strbuf);
571         if (buff != NULL) Free(buff);
572         if (in != NULL) BIO_free(in);
573         if (out != NULL) BIO_free(out);
574         if (benc != NULL) BIO_free(benc);
575         if (b64 != NULL) BIO_free(b64);
576         EXIT(ret);
577         }
578
579 int set_hex(char *in, unsigned char *out, int size)
580         {
581         int i,n;
582         unsigned char j;
583
584         n=strlen(in);
585         if (n > (size*2))
586                 {
587                 BIO_printf(bio_err,"hex string is too long\n");
588                 return(0);
589                 }
590         memset(out,0,size);
591         for (i=0; i<n; i++)
592                 {
593                 j=(unsigned char)*in;
594                 *(in++)='\0';
595                 if (j == 0) break;
596                 if ((j >= '0') && (j <= '9'))
597                         j-='0';
598                 else if ((j >= 'A') && (j <= 'F'))
599                         j=j-'A'+10;
600                 else if ((j >= 'a') && (j <= 'f'))
601                         j=j-'a'+10;
602                 else
603                         {
604                         BIO_printf(bio_err,"non-hex digit\n");
605                         return(0);
606                         }
607                 if (i&1)
608                         out[i/2]|=j;
609                 else
610                         out[i/2]=(j<<4);
611                 }
612         return(1);
613         }