e584241bf1d2cf6c2caa61a41338bfeed3ff5f2e
[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 argc, char **argv)
84         {
85         static const char magic[]="Salted__";
86         char mbuf[8];   /* should be 1 smaller than magic */
87         char *strbuf=NULL;
88         unsigned char *buff=NULL,*bufsize=NULL;
89         int bsize=BSIZE,verbose=0;
90         int ret=1,inl;
91         unsigned char key[24],iv[MD5_DIGEST_LENGTH];
92         unsigned char salt[PKCS5_SALT_LEN];
93         char *str=NULL;
94         char *hkey=NULL,*hiv=NULL,*hsalt = NULL;
95         int enc=1,printkey=0,i,base64=0;
96         int debug=0,olb64=0,nosalt=0;
97         const EVP_CIPHER *cipher=NULL,*c;
98         char *inf=NULL,*outf=NULL;
99         BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
100 #define PROG_NAME_SIZE  16
101         char pname[PROG_NAME_SIZE];
102
103         apps_startup();
104
105         if (bio_err == NULL)
106                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
107                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
108
109         /* first check the program name */
110         program_name(argv[0],pname,PROG_NAME_SIZE);
111         if (strcmp(pname,"base64") == 0)
112                 base64=1;
113
114         cipher=EVP_get_cipherbyname(pname);
115         if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
116                 {
117                 BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
118                 goto bad;
119                 }
120
121         argc--;
122         argv++;
123         while (argc >= 1)
124                 {
125                 if      (strcmp(*argv,"-e") == 0)
126                         enc=1;
127                 else if (strcmp(*argv,"-in") == 0)
128                         {
129                         if (--argc < 1) goto bad;
130                         inf= *(++argv);
131                         }
132                 else if (strcmp(*argv,"-out") == 0)
133                         {
134                         if (--argc < 1) goto bad;
135                         outf= *(++argv);
136                         }
137                 else if (strcmp(*argv,"-d") == 0)
138                         enc=0;
139                 else if (strcmp(*argv,"-p") == 0)
140                         printkey=1;
141                 else if (strcmp(*argv,"-v") == 0)
142                         verbose=1;
143                 else if (strcmp(*argv,"-salt") == 0)
144                         nosalt=0;
145                 else if (strcmp(*argv,"-nosalt") == 0)
146                         nosalt=1;
147                 else if (strcmp(*argv,"-debug") == 0)
148                         debug=1;
149                 else if (strcmp(*argv,"-P") == 0)
150                         printkey=2;
151                 else if (strcmp(*argv,"-A") == 0)
152                         olb64=1;
153                 else if (strcmp(*argv,"-a") == 0)
154                         base64=1;
155                 else if (strcmp(*argv,"-base64") == 0)
156                         base64=1;
157                 else if (strcmp(*argv,"-bufsize") == 0)
158                         {
159                         if (--argc < 1) goto bad;
160                         bufsize=(unsigned char *)*(++argv);
161                         }
162                 else if (strcmp(*argv,"-k") == 0)
163                         {
164                         if (--argc < 1) goto bad;
165                         str= *(++argv);
166                         }
167                 else if (strcmp(*argv,"-kfile") == 0)
168                         {
169                         static char buf[128];
170                         FILE *infile;
171                         char *file;
172
173                         if (--argc < 1) goto bad;
174                         file= *(++argv);
175                         infile=fopen(file,"r");
176                         if (infile == NULL)
177                                 {
178                                 BIO_printf(bio_err,"unable to read key from '%s'\n",
179                                         file);
180                                 goto bad;
181                                 }
182                         buf[0]='\0';
183                         fgets(buf,128,infile);
184                         fclose(infile);
185                         i=strlen(buf);
186                         if ((i > 0) &&
187                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
188                                 buf[--i]='\0';
189                         if ((i > 0) &&
190                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
191                                 buf[--i]='\0';
192                         if (i < 1)
193                                 {
194                                 BIO_printf(bio_err,"zero length password\n");
195                                 goto bad;
196                                 }
197                         str=buf;
198                         }
199                 else if (strcmp(*argv,"-K") == 0)
200                         {
201                         if (--argc < 1) goto bad;
202                         hkey= *(++argv);
203                         }
204                 else if (strcmp(*argv,"-S") == 0)
205                         {
206                         if (--argc < 1) goto bad;
207                         hsalt= *(++argv);
208                         }
209                 else if (strcmp(*argv,"-iv") == 0)
210                         {
211                         if (--argc < 1) goto bad;
212                         hiv= *(++argv);
213                         }
214                 else if ((argv[0][0] == '-') &&
215                         ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
216                         {
217                         cipher=c;
218                         }
219                 else if (strcmp(*argv,"-none") == 0)
220                         cipher=NULL;
221                 else
222                         {
223                         BIO_printf(bio_err,"unknown option '%s'\n",*argv);
224 bad:
225                         BIO_printf(bio_err,"options are\n");
226                         BIO_printf(bio_err,"%-14s input file\n","-in <file>");
227                         BIO_printf(bio_err,"%-14s output fileencrypt\n","-out <file>");
228                         BIO_printf(bio_err,"%-14s encrypt\n","-e");
229                         BIO_printf(bio_err,"%-14s decrypt\n","-d");
230                         BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
231                         BIO_printf(bio_err,"%-14s key is the next argument\n","-k");
232                         BIO_printf(bio_err,"%-14s key is the first line of the file argument\n","-kfile");
233                         BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
234                         BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
235                         BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
236
237                         BIO_printf(bio_err,"Cipher Types\n");
238                         BIO_printf(bio_err,"des     : 56 bit key DES encryption\n");
239                         BIO_printf(bio_err,"des_ede :112 bit key ede DES encryption\n");
240                         BIO_printf(bio_err,"des_ede3:168 bit key ede DES encryption\n");
241 #ifndef NO_IDEA
242                         BIO_printf(bio_err,"idea    :128 bit key IDEA encryption\n");
243 #endif
244 #ifndef NO_RC4
245                         BIO_printf(bio_err,"rc2     :128 bit key RC2 encryption\n");
246 #endif
247 #ifndef NO_BF
248                         BIO_printf(bio_err,"bf      :128 bit key BlowFish encryption\n");
249 #endif
250 #ifndef NO_RC4
251                         BIO_printf(bio_err," -%-5s :128 bit key RC4 encryption\n",
252                                 LN_rc4);
253 #endif
254
255                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
256                                 LN_des_ecb,LN_des_cbc,
257                                 LN_des_cfb64,LN_des_ofb64);
258                         BIO_printf(bio_err," -%-4s (%s)\n",
259                                 "des", LN_des_cbc);
260
261                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
262                                 LN_des_ede,LN_des_ede_cbc,
263                                 LN_des_ede_cfb64,LN_des_ede_ofb64);
264                         BIO_printf(bio_err," -desx -none\n");
265
266
267                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
268                                 LN_des_ede3,LN_des_ede3_cbc,
269                                 LN_des_ede3_cfb64,LN_des_ede3_ofb64);
270                         BIO_printf(bio_err," -%-4s (%s)\n",
271                                 "des3", LN_des_ede3_cbc);
272
273 #ifndef NO_IDEA
274                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
275                                 LN_idea_ecb, LN_idea_cbc,
276                                 LN_idea_cfb64, LN_idea_ofb64);
277                         BIO_printf(bio_err," -%-4s (%s)\n","idea",LN_idea_cbc);
278 #endif
279 #ifndef NO_RC2
280                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
281                                 LN_rc2_ecb, LN_rc2_cbc,
282                                 LN_rc2_cfb64, LN_rc2_ofb64);
283                         BIO_printf(bio_err," -%-4s (%s)\n","rc2", LN_rc2_cbc);
284 #endif
285 #ifndef NO_BF
286                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
287                                 LN_bf_ecb, LN_bf_cbc,
288                                 LN_bf_cfb64, LN_bf_ofb64);
289                         BIO_printf(bio_err," -%-4s (%s)\n","bf", LN_bf_cbc);
290 #endif
291 #ifndef NO_CAST
292                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
293                                 LN_cast5_ecb, LN_cast5_cbc,
294                                 LN_cast5_cfb64, LN_cast5_ofb64);
295                         BIO_printf(bio_err," -%-4s (%s)\n","cast", LN_cast5_cbc);
296 #endif
297 #ifndef NO_RC5
298                         BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
299                                 LN_rc5_ecb, LN_rc5_cbc,
300                                 LN_rc5_cfb64, LN_rc5_ofb64);
301                         BIO_printf(bio_err," -%-4s (%s)\n","rc5", LN_rc5_cbc);
302 #endif
303                         goto end;
304                         }
305                 argc--;
306                 argv++;
307                 }
308
309         if (bufsize != NULL)
310                 {
311                 unsigned long n;
312
313                 for (n=0; *bufsize; bufsize++)
314                         {
315                         i= *bufsize;
316                         if ((i <= '9') && (i >= '0'))
317                                 n=n*10+i-'0';
318                         else if (i == 'k')
319                                 {
320                                 n*=1024;
321                                 bufsize++;
322                                 break;
323                                 }
324                         }
325                 if (*bufsize != '\0')
326                         {
327                         BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
328                         goto end;
329                         }
330
331                 /* It must be large enough for a base64 encoded line */
332                 if (n < 80) n=80;
333
334                 bsize=(int)n;
335                 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
336                 }
337
338         strbuf=Malloc(SIZE);
339         buff=(unsigned char *)Malloc(EVP_ENCODE_LENGTH(bsize));
340         if ((buff == NULL) || (strbuf == NULL))
341                 {
342                 BIO_printf(bio_err,"Malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
343                 goto end;
344                 }
345
346         in=BIO_new(BIO_s_file());
347         out=BIO_new(BIO_s_file());
348         if ((in == NULL) || (out == NULL))
349                 {
350                 ERR_print_errors(bio_err);
351                 goto end;
352                 }
353         if (debug)
354                 {
355                 BIO_set_callback(in,BIO_debug_callback);
356                 BIO_set_callback(out,BIO_debug_callback);
357                 BIO_set_callback_arg(in,bio_err);
358                 BIO_set_callback_arg(out,bio_err);
359                 }
360
361         if (inf == NULL)
362                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
363         else
364                 {
365                 if (BIO_read_filename(in,inf) <= 0)
366                         {
367                         perror(inf);
368                         goto end;
369                         }
370                 }
371
372         if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
373                 {
374                 for (;;)
375                         {
376                         char buf[200];
377
378                         sprintf(buf,"enter %s %s password:",
379                                 OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
380                                 (enc)?"encryption":"decryption");
381                         strbuf[0]='\0';
382                         i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
383                         if (i == 0)
384                                 {
385                                 if (strbuf[0] == '\0')
386                                         {
387                                         ret=1;
388                                         goto end;
389                                         }
390                                 str=strbuf;
391                                 break;
392                                 }
393                         if (i < 0)
394                                 {
395                                 BIO_printf(bio_err,"bad password read\n");
396                                 goto end;
397                                 }
398                         }
399                 }
400
401
402         if (outf == NULL)
403                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
404         else
405                 {
406                 if (BIO_write_filename(out,outf) <= 0)
407                         {
408                         perror(outf);
409                         goto end;
410                         }
411                 }
412
413         rbio=in;
414         wbio=out;
415
416         if (base64)
417                 {
418                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
419                         goto end;
420                 if (debug)
421                         {
422                         BIO_set_callback(b64,BIO_debug_callback);
423                         BIO_set_callback_arg(b64,bio_err);
424                         }
425                 if (olb64)
426                         BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
427                 if (enc)
428                         wbio=BIO_push(b64,wbio);
429                 else
430                         rbio=BIO_push(b64,rbio);
431                 }
432
433         if (cipher != NULL)
434                 {
435                 if (str != NULL)
436                         {
437                         /* Salt handling: if encrypting generate a salt and
438                          * write to output BIO. If decrypting read salt from
439                          * input BIO.
440                          */
441                         unsigned char *sptr;
442                         if(nosalt) sptr = NULL;
443                         else {
444                                 if(enc) {
445                                         if(hsalt) {
446                                                 if(!set_hex(hsalt,salt,PKCS5_SALT_LEN)) {
447                                                         BIO_printf(bio_err,
448                                                                 "invalid hex salt value\n");
449                                                         goto end;
450                                                 }
451                                         } else RAND_bytes(salt, PKCS5_SALT_LEN);
452                                         /* If -P option then don't bother writing */
453                                         if((printkey != 2)
454                                            && (BIO_write(wbio,magic,
455                                                          sizeof magic-1) != sizeof magic-1
456                                                || BIO_write(wbio,
457                                                             (char *)salt,
458                                                             PKCS5_SALT_LEN) != PKCS5_SALT_LEN)) {
459                                                 BIO_printf(bio_err,"error writing output file\n");
460                                                 goto end;
461                                         }
462                                 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
463                                           || BIO_read(rbio,
464                                                       (unsigned char *)salt,
465                                     PKCS5_SALT_LEN) != PKCS5_SALT_LEN) {
466                                         BIO_printf(bio_err,"error reading input file\n");
467                                         goto end;
468                                 } else if(memcmp(mbuf,magic,sizeof magic-1)) {
469                                     BIO_printf(bio_err,"bad magic number\n");
470                                     goto end;
471                                 }
472
473                                 sptr = salt;
474                         }
475
476                         EVP_BytesToKey(cipher,EVP_md5(),sptr,
477                                 (unsigned char *)str,
478                                 strlen(str),1,key,iv);
479                         /* zero the complete buffer or the string
480                          * passed from the command line
481                          * bug picked up by
482                          * Larry J. Hughes Jr. <hughes@indiana.edu> */
483                         if (str == strbuf)
484                                 memset(str,0,SIZE);
485                         else
486                                 memset(str,0,strlen(str));
487                         }
488                 if ((hiv != NULL) && !set_hex(hiv,iv,8))
489                         {
490                         BIO_printf(bio_err,"invalid hex iv value\n");
491                         goto end;
492                         }
493                 if ((hkey != NULL) && !set_hex(hkey,key,24))
494                         {
495                         BIO_printf(bio_err,"invalid hex key value\n");
496                         goto end;
497                         }
498
499                 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
500                         goto end;
501                 BIO_set_cipher(benc,cipher,key,iv,enc);
502                 if (debug)
503                         {
504                         BIO_set_callback(benc,BIO_debug_callback);
505                         BIO_set_callback_arg(benc,bio_err);
506                         }
507
508                 if (printkey)
509                         {
510                         if (!nosalt)
511                                 {
512                                 printf("salt=");
513                                 for (i=0; i<PKCS5_SALT_LEN; i++)
514                                         printf("%02X",salt[i]);
515                                 printf("\n");
516                                 }
517                         if (cipher->key_len > 0)
518                                 {
519                                 printf("key=");
520                                 for (i=0; i<cipher->key_len; i++)
521                                         printf("%02X",key[i]);
522                                 printf("\n");
523                                 }
524                         if (cipher->iv_len > 0)
525                                 {
526                                 printf("iv =");
527                                 for (i=0; i<cipher->iv_len; i++)
528                                         printf("%02X",iv[i]);
529                                 printf("\n");
530                                 }
531                         if (printkey == 2)
532                                 {
533                                 ret=0;
534                                 goto end;
535                                 }
536                         }
537                 }
538
539         /* Only encrypt/decrypt as we write the file */
540         if (benc != NULL)
541                 wbio=BIO_push(benc,wbio);
542
543         for (;;)
544                 {
545                 inl=BIO_read(rbio,(char *)buff,bsize);
546                 if (inl <= 0) break;
547                 if (BIO_write(wbio,(char *)buff,inl) != inl)
548                         {
549                         BIO_printf(bio_err,"error writing output file\n");
550                         goto end;
551                         }
552                 }
553         if (!BIO_flush(wbio))
554                 {
555                 BIO_printf(bio_err,"bad decrypt\n");
556                 goto end;
557                 }
558
559         ret=0;
560         if (verbose)
561                 {
562                 BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
563                 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
564                 }
565 end:
566         if (strbuf != NULL) Free(strbuf);
567         if (buff != NULL) Free(buff);
568         if (in != NULL) BIO_free(in);
569         if (out != NULL) BIO_free(out);
570         if (benc != NULL) BIO_free(benc);
571         if (b64 != NULL) BIO_free(b64);
572         EXIT(ret);
573         }
574
575 int set_hex(char *in, unsigned char *out, int size)
576         {
577         int i,n;
578         unsigned char j;
579
580         n=strlen(in);
581         if (n > (size*2))
582                 {
583                 BIO_printf(bio_err,"hex string is too long\n");
584                 return(0);
585                 }
586         memset(out,0,size);
587         for (i=0; i<n; i++)
588                 {
589                 j=(unsigned char)*in;
590                 *(in++)='\0';
591                 if (j == 0) break;
592                 if ((j >= '0') && (j <= '9'))
593                         j-='0';
594                 else if ((j >= 'A') && (j <= 'F'))
595                         j=j-'A'+10;
596                 else if ((j >= 'a') && (j <= 'f'))
597                         j=j-'a'+10;
598                 else
599                         {
600                         BIO_printf(bio_err,"non-hex digit\n");
601                         return(0);
602                         }
603                 if (i&1)
604                         out[i/2]|=j;
605                 else
606                         out[i/2]=(j<<4);
607                 }
608         return(1);
609         }