e53cf3b415cb156e204d46b0c73f7079376f6b14
[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 #include <openssl/engine.h>
74 #include <ctype.h>
75
76 int set_hex(char *in,unsigned char *out,int size);
77 #undef SIZE
78 #undef BSIZE
79 #undef PROG
80
81 #define SIZE    (512)
82 #define BSIZE   (8*1024)
83 #define PROG    enc_main
84
85 void show_ciphers(const OBJ_NAME *name,void *bio_)
86         {
87         BIO *bio=bio_;
88         static int n;
89
90         if(!islower((unsigned char)*name->name))
91                 return;
92
93         BIO_printf(bio,"-%-25s",name->name);
94         if(++n == 3)
95                 {
96                 BIO_printf(bio,"\n");
97                 n=0;
98                 }
99         else
100                 BIO_printf(bio," ");
101         }
102
103 int MAIN(int, char **);
104
105 int MAIN(int argc, char **argv)
106         {
107         ENGINE *e = NULL;
108         static const char magic[]="Salted__";
109         char mbuf[8];   /* should be 1 smaller than magic */
110         char *strbuf=NULL;
111         unsigned char *buff=NULL,*bufsize=NULL;
112         int bsize=BSIZE,verbose=0;
113         int ret=1,inl;
114         unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH];
115         unsigned char salt[PKCS5_SALT_LEN];
116         char *str=NULL, *passarg = NULL, *pass = NULL;
117         char *hkey=NULL,*hiv=NULL,*hsalt = NULL;
118         int enc=1,printkey=0,i,base64=0;
119         int debug=0,olb64=0,nosalt=0;
120         const EVP_CIPHER *cipher=NULL,*c;
121         char *inf=NULL,*outf=NULL;
122         BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
123 #define PROG_NAME_SIZE  16
124         char pname[PROG_NAME_SIZE];
125         char *engine = NULL;
126
127         apps_startup();
128
129         if (bio_err == NULL)
130                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
131                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
132
133         /* first check the program name */
134         program_name(argv[0],pname,PROG_NAME_SIZE);
135         if (strcmp(pname,"base64") == 0)
136                 base64=1;
137
138         cipher=EVP_get_cipherbyname(pname);
139         if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
140                 {
141                 BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
142                 goto bad;
143                 }
144
145         argc--;
146         argv++;
147         while (argc >= 1)
148                 {
149                 if      (strcmp(*argv,"-e") == 0)
150                         enc=1;
151                 else if (strcmp(*argv,"-in") == 0)
152                         {
153                         if (--argc < 1) goto bad;
154                         inf= *(++argv);
155                         }
156                 else if (strcmp(*argv,"-out") == 0)
157                         {
158                         if (--argc < 1) goto bad;
159                         outf= *(++argv);
160                         }
161                 else if (strcmp(*argv,"-pass") == 0)
162                         {
163                         if (--argc < 1) goto bad;
164                         passarg= *(++argv);
165                         }
166                 else if (strcmp(*argv,"-engine") == 0)
167                         {
168                         if (--argc < 1) goto bad;
169                         engine= *(++argv);
170                         }
171                 else if (strcmp(*argv,"-d") == 0)
172                         enc=0;
173                 else if (strcmp(*argv,"-p") == 0)
174                         printkey=1;
175                 else if (strcmp(*argv,"-v") == 0)
176                         verbose=1;
177                 else if (strcmp(*argv,"-salt") == 0)
178                         nosalt=0;
179                 else if (strcmp(*argv,"-nosalt") == 0)
180                         nosalt=1;
181                 else if (strcmp(*argv,"-debug") == 0)
182                         debug=1;
183                 else if (strcmp(*argv,"-P") == 0)
184                         printkey=2;
185                 else if (strcmp(*argv,"-A") == 0)
186                         olb64=1;
187                 else if (strcmp(*argv,"-a") == 0)
188                         base64=1;
189                 else if (strcmp(*argv,"-base64") == 0)
190                         base64=1;
191                 else if (strcmp(*argv,"-bufsize") == 0)
192                         {
193                         if (--argc < 1) goto bad;
194                         bufsize=(unsigned char *)*(++argv);
195                         }
196                 else if (strcmp(*argv,"-k") == 0)
197                         {
198                         if (--argc < 1) goto bad;
199                         str= *(++argv);
200                         }
201                 else if (strcmp(*argv,"-kfile") == 0)
202                         {
203                         static char buf[128];
204                         FILE *infile;
205                         char *file;
206
207                         if (--argc < 1) goto bad;
208                         file= *(++argv);
209                         infile=fopen(file,"r");
210                         if (infile == NULL)
211                                 {
212                                 BIO_printf(bio_err,"unable to read key from '%s'\n",
213                                         file);
214                                 goto bad;
215                                 }
216                         buf[0]='\0';
217                         fgets(buf,128,infile);
218                         fclose(infile);
219                         i=strlen(buf);
220                         if ((i > 0) &&
221                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
222                                 buf[--i]='\0';
223                         if ((i > 0) &&
224                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
225                                 buf[--i]='\0';
226                         if (i < 1)
227                                 {
228                                 BIO_printf(bio_err,"zero length password\n");
229                                 goto bad;
230                                 }
231                         str=buf;
232                         }
233                 else if (strcmp(*argv,"-K") == 0)
234                         {
235                         if (--argc < 1) goto bad;
236                         hkey= *(++argv);
237                         }
238                 else if (strcmp(*argv,"-S") == 0)
239                         {
240                         if (--argc < 1) goto bad;
241                         hsalt= *(++argv);
242                         }
243                 else if (strcmp(*argv,"-iv") == 0)
244                         {
245                         if (--argc < 1) goto bad;
246                         hiv= *(++argv);
247                         }
248                 else if ((argv[0][0] == '-') &&
249                         ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
250                         {
251                         cipher=c;
252                         }
253                 else if (strcmp(*argv,"-none") == 0)
254                         cipher=NULL;
255                 else
256                         {
257                         BIO_printf(bio_err,"unknown option '%s'\n",*argv);
258 bad:
259                         BIO_printf(bio_err,"options are\n");
260                         BIO_printf(bio_err,"%-14s input file\n","-in <file>");
261                         BIO_printf(bio_err,"%-14s output file\n","-out <file>");
262                         BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>");
263                         BIO_printf(bio_err,"%-14s encrypt\n","-e");
264                         BIO_printf(bio_err,"%-14s decrypt\n","-d");
265                         BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
266                         BIO_printf(bio_err,"%-14s key is the next argument\n","-k");
267                         BIO_printf(bio_err,"%-14s key is the first line of the file argument\n","-kfile");
268                         BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
269                         BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
270                         BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
271                         BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e");
272
273                         BIO_printf(bio_err,"Cipher Types\n");
274                         OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
275                                                show_ciphers,
276                                                bio_err);
277                         BIO_printf(bio_err,"\n");
278
279                         goto end;
280                         }
281                 argc--;
282                 argv++;
283                 }
284
285         if (engine != NULL)
286                 {
287                 if((e = ENGINE_by_id(engine)) == NULL)
288                         {
289                         BIO_printf(bio_err,"invalid engine \"%s\"\n",
290                                 engine);
291                         goto end;
292                         }
293                 if(!ENGINE_set_default(e, ENGINE_METHOD_ALL))
294                         {
295                         BIO_printf(bio_err,"can't use that engine\n");
296                         goto end;
297                         }
298                 BIO_printf(bio_err,"engine \"%s\" set.\n", engine);
299                 /* Free our "structural" reference. */
300                 ENGINE_free(e);
301                 }
302
303         if (bufsize != NULL)
304                 {
305                 unsigned long n;
306
307                 for (n=0; *bufsize; bufsize++)
308                         {
309                         i= *bufsize;
310                         if ((i <= '9') && (i >= '0'))
311                                 n=n*10+i-'0';
312                         else if (i == 'k')
313                                 {
314                                 n*=1024;
315                                 bufsize++;
316                                 break;
317                                 }
318                         }
319                 if (*bufsize != '\0')
320                         {
321                         BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
322                         goto end;
323                         }
324
325                 /* It must be large enough for a base64 encoded line */
326                 if (n < 80) n=80;
327
328                 bsize=(int)n;
329                 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
330                 }
331
332         strbuf=OPENSSL_malloc(SIZE);
333         buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize));
334         if ((buff == NULL) || (strbuf == NULL))
335                 {
336                 BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
337                 goto end;
338                 }
339
340         in=BIO_new(BIO_s_file());
341         out=BIO_new(BIO_s_file());
342         if ((in == NULL) || (out == NULL))
343                 {
344                 ERR_print_errors(bio_err);
345                 goto end;
346                 }
347         if (debug)
348                 {
349                 BIO_set_callback(in,BIO_debug_callback);
350                 BIO_set_callback(out,BIO_debug_callback);
351                 BIO_set_callback_arg(in,bio_err);
352                 BIO_set_callback_arg(out,bio_err);
353                 }
354
355         if (inf == NULL)
356                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
357         else
358                 {
359                 if (BIO_read_filename(in,inf) <= 0)
360                         {
361                         perror(inf);
362                         goto end;
363                         }
364                 }
365
366         if(!str && passarg) {
367                 if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
368                         BIO_printf(bio_err, "Error getting password\n");
369                         goto end;
370                 }
371                 str = pass;
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                 {
406                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
407 #ifdef VMS
408                 {
409                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
410                 out = BIO_push(tmpbio, out);
411                 }
412 #endif
413                 }
414         else
415                 {
416                 if (BIO_write_filename(out,outf) <= 0)
417                         {
418                         perror(outf);
419                         goto end;
420                         }
421                 }
422
423         rbio=in;
424         wbio=out;
425
426         if (base64)
427                 {
428                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
429                         goto end;
430                 if (debug)
431                         {
432                         BIO_set_callback(b64,BIO_debug_callback);
433                         BIO_set_callback_arg(b64,bio_err);
434                         }
435                 if (olb64)
436                         BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
437                 if (enc)
438                         wbio=BIO_push(b64,wbio);
439                 else
440                         rbio=BIO_push(b64,rbio);
441                 }
442
443         if (cipher != NULL)
444                 {
445                 /* Note that str is NULL if a key was passed on the command
446                  * line, so we get no salt in that case. Is this a bug?
447                  */
448                 if (str != NULL)
449                         {
450                         /* Salt handling: if encrypting generate a salt and
451                          * write to output BIO. If decrypting read salt from
452                          * input BIO.
453                          */
454                         unsigned char *sptr;
455                         if(nosalt) sptr = NULL;
456                         else {
457                                 if(enc) {
458                                         if(hsalt) {
459                                                 if(!set_hex(hsalt,salt,PKCS5_SALT_LEN)) {
460                                                         BIO_printf(bio_err,
461                                                                 "invalid hex salt value\n");
462                                                         goto end;
463                                                 }
464                                         } else if (RAND_pseudo_bytes(salt, PKCS5_SALT_LEN) < 0)
465                                                 goto end;
466                                         /* If -P option then don't bother writing */
467                                         if((printkey != 2)
468                                            && (BIO_write(wbio,magic,
469                                                          sizeof magic-1) != sizeof magic-1
470                                                || BIO_write(wbio,
471                                                             (char *)salt,
472                                                             PKCS5_SALT_LEN) != PKCS5_SALT_LEN)) {
473                                                 BIO_printf(bio_err,"error writing output file\n");
474                                                 goto end;
475                                         }
476                                 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
477                                           || BIO_read(rbio,
478                                                       (unsigned char *)salt,
479                                     PKCS5_SALT_LEN) != PKCS5_SALT_LEN) {
480                                         BIO_printf(bio_err,"error reading input file\n");
481                                         goto end;
482                                 } else if(memcmp(mbuf,magic,sizeof magic-1)) {
483                                     BIO_printf(bio_err,"bad magic number\n");
484                                     goto end;
485                                 }
486
487                                 sptr = salt;
488                         }
489
490                         EVP_BytesToKey(cipher,EVP_md5(),sptr,
491                                 (unsigned char *)str,
492                                 strlen(str),1,key,iv);
493                         /* zero the complete buffer or the string
494                          * passed from the command line
495                          * bug picked up by
496                          * Larry J. Hughes Jr. <hughes@indiana.edu> */
497                         if (str == strbuf)
498                                 memset(str,0,SIZE);
499                         else
500                                 memset(str,0,strlen(str));
501                         }
502                 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv))
503                         {
504                         BIO_printf(bio_err,"invalid hex iv value\n");
505                         goto end;
506                         }
507                 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key))
508                         {
509                         BIO_printf(bio_err,"invalid hex key value\n");
510                         goto end;
511                         }
512
513                 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
514                         goto end;
515                 BIO_set_cipher(benc,cipher,key,iv,enc);
516                 if (debug)
517                         {
518                         BIO_set_callback(benc,BIO_debug_callback);
519                         BIO_set_callback_arg(benc,bio_err);
520                         }
521
522                 if (printkey)
523                         {
524                         if (!nosalt)
525                                 {
526                                 printf("salt=");
527                                 for (i=0; i<PKCS5_SALT_LEN; i++)
528                                         printf("%02X",salt[i]);
529                                 printf("\n");
530                                 }
531                         if (cipher->key_len > 0)
532                                 {
533                                 printf("key=");
534                                 for (i=0; i<cipher->key_len; i++)
535                                         printf("%02X",key[i]);
536                                 printf("\n");
537                                 }
538                         if (cipher->iv_len > 0)
539                                 {
540                                 printf("iv =");
541                                 for (i=0; i<cipher->iv_len; i++)
542                                         printf("%02X",iv[i]);
543                                 printf("\n");
544                                 }
545                         if (printkey == 2)
546                                 {
547                                 ret=0;
548                                 goto end;
549                                 }
550                         }
551                 }
552
553         /* Only encrypt/decrypt as we write the file */
554         if (benc != NULL)
555                 wbio=BIO_push(benc,wbio);
556
557         for (;;)
558                 {
559                 inl=BIO_read(rbio,(char *)buff,bsize);
560                 if (inl <= 0) break;
561                 if (BIO_write(wbio,(char *)buff,inl) != inl)
562                         {
563                         BIO_printf(bio_err,"error writing output file\n");
564                         goto end;
565                         }
566                 }
567         if (!BIO_flush(wbio))
568                 {
569                 BIO_printf(bio_err,"bad decrypt\n");
570                 goto end;
571                 }
572
573         ret=0;
574         if (verbose)
575                 {
576                 BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
577                 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
578                 }
579 end:
580         ERR_print_errors(bio_err);
581         if (strbuf != NULL) OPENSSL_free(strbuf);
582         if (buff != NULL) OPENSSL_free(buff);
583         if (in != NULL) BIO_free(in);
584         if (out != NULL) BIO_free_all(out);
585         if (benc != NULL) BIO_free(benc);
586         if (b64 != NULL) BIO_free(b64);
587         if(pass) OPENSSL_free(pass);
588         EXIT(ret);
589         }
590
591 int set_hex(char *in, unsigned char *out, int size)
592         {
593         int i,n;
594         unsigned char j;
595
596         n=strlen(in);
597         if (n > (size*2))
598                 {
599                 BIO_printf(bio_err,"hex string is too long\n");
600                 return(0);
601                 }
602         memset(out,0,size);
603         for (i=0; i<n; i++)
604                 {
605                 j=(unsigned char)*in;
606                 *(in++)='\0';
607                 if (j == 0) break;
608                 if ((j >= '0') && (j <= '9'))
609                         j-='0';
610                 else if ((j >= 'A') && (j <= 'F'))
611                         j=j-'A'+10;
612                 else if ((j >= 'a') && (j <= 'f'))
613                         j=j-'a'+10;
614                 else
615                         {
616                         BIO_printf(bio_err,"non-hex digit\n");
617                         return(0);
618                         }
619                 if (i&1)
620                         out[i/2]|=j;
621                 else
622                         out[i/2]=(j<<4);
623                 }
624         return(1);
625         }