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
show_ciphers(const OBJ_NAME * name,void * bio_)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
MAIN(int argc,char ** argv)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 char *md=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 EVP_CIPHER_CTX *ctx = NULL;
122 char *inf=NULL,*outf=NULL;
123 BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
124 #define PROG_NAME_SIZE 39
125 char pname[PROG_NAME_SIZE+1];
126 #ifndef OPENSSL_NO_ENGINE
127 char *engine = NULL;
128 #endif
129 const EVP_MD *dgst=NULL;
130
131 apps_startup();
132
133 if (bio_err == NULL)
134 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
135 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
136
137 if (!load_config(bio_err, NULL))
138 goto end;
139
140 /* first check the program name */
141 program_name(argv[0],pname,sizeof pname);
142 if (strcmp(pname,"base64") == 0)
143 base64=1;
144
145 cipher=EVP_get_cipherbyname(pname);
146 if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
147 {
148 BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
149 goto bad;
150 }
151
152 argc--;
153 argv++;
154 while (argc >= 1)
155 {
156 if (strcmp(*argv,"-e") == 0)
157 enc=1;
158 else if (strcmp(*argv,"-in") == 0)
159 {
160 if (--argc < 1) goto bad;
161 inf= *(++argv);
162 }
163 else if (strcmp(*argv,"-out") == 0)
164 {
165 if (--argc < 1) goto bad;
166 outf= *(++argv);
167 }
168 else if (strcmp(*argv,"-pass") == 0)
169 {
170 if (--argc < 1) goto bad;
171 passarg= *(++argv);
172 }
173 #ifndef OPENSSL_NO_ENGINE
174 else if (strcmp(*argv,"-engine") == 0)
175 {
176 if (--argc < 1) goto bad;
177 engine= *(++argv);
178 }
179 #endif
180 else if (strcmp(*argv,"-d") == 0)
181 enc=0;
182 else if (strcmp(*argv,"-p") == 0)
183 printkey=1;
184 else if (strcmp(*argv,"-v") == 0)
185 verbose=1;
186 else if (strcmp(*argv,"-nopad") == 0)
187 nopad=1;
188 else if (strcmp(*argv,"-salt") == 0)
189 nosalt=0;
190 else if (strcmp(*argv,"-nosalt") == 0)
191 nosalt=1;
192 else if (strcmp(*argv,"-debug") == 0)
193 debug=1;
194 else if (strcmp(*argv,"-P") == 0)
195 printkey=2;
196 else if (strcmp(*argv,"-A") == 0)
197 olb64=1;
198 else if (strcmp(*argv,"-a") == 0)
199 base64=1;
200 else if (strcmp(*argv,"-base64") == 0)
201 base64=1;
202 else if (strcmp(*argv,"-bufsize") == 0)
203 {
204 if (--argc < 1) goto bad;
205 bufsize=(unsigned char *)*(++argv);
206 }
207 else if (strcmp(*argv,"-k") == 0)
208 {
209 if (--argc < 1) goto bad;
210 str= *(++argv);
211 }
212 else if (strcmp(*argv,"-kfile") == 0)
213 {
214 static char buf[128];
215 FILE *infile;
216 char *file;
217
218 if (--argc < 1) goto bad;
219 file= *(++argv);
220 infile=fopen(file,"r");
221 if (infile == NULL)
222 {
223 BIO_printf(bio_err,"unable to read key from '%s'\n",
224 file);
225 goto bad;
226 }
227 buf[0]='\0';
228 fgets(buf,sizeof buf,infile);
229 fclose(infile);
230 i=strlen(buf);
231 if ((i > 0) &&
232 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
233 buf[--i]='\0';
234 if ((i > 0) &&
235 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
236 buf[--i]='\0';
237 if (i < 1)
238 {
239 BIO_printf(bio_err,"zero length password\n");
240 goto bad;
241 }
242 str=buf;
243 }
244 else if (strcmp(*argv,"-K") == 0)
245 {
246 if (--argc < 1) goto bad;
247 hkey= *(++argv);
248 }
249 else if (strcmp(*argv,"-S") == 0)
250 {
251 if (--argc < 1) goto bad;
252 hsalt= *(++argv);
253 }
254 else if (strcmp(*argv,"-iv") == 0)
255 {
256 if (--argc < 1) goto bad;
257 hiv= *(++argv);
258 }
259 else if (strcmp(*argv,"-md") == 0)
260 {
261 if (--argc < 1) goto bad;
262 md= *(++argv);
263 }
264 else if ((argv[0][0] == '-') &&
265 ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
266 {
267 cipher=c;
268 }
269 else if (strcmp(*argv,"-none") == 0)
270 cipher=NULL;
271 else
272 {
273 BIO_printf(bio_err,"unknown option '%s'\n",*argv);
274 bad:
275 BIO_printf(bio_err,"options are\n");
276 BIO_printf(bio_err,"%-14s input file\n","-in <file>");
277 BIO_printf(bio_err,"%-14s output file\n","-out <file>");
278 BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>");
279 BIO_printf(bio_err,"%-14s encrypt\n","-e");
280 BIO_printf(bio_err,"%-14s decrypt\n","-d");
281 BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
282 BIO_printf(bio_err,"%-14s passphrase is the next argument\n","-k");
283 BIO_printf(bio_err,"%-14s passphrase is the first line of the file argument\n","-kfile");
284 BIO_printf(bio_err,"%-14s the next argument is the md to use to create a key\n","-md");
285 BIO_printf(bio_err,"%-14s from a passphrase. One of md2, md5, sha or sha1\n","");
286 BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
287 BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
288 BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
289 #ifndef OPENSSL_NO_ENGINE
290 BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e");
291 #endif
292
293 BIO_printf(bio_err,"Cipher Types\n");
294 OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
295 show_ciphers,
296 bio_err);
297 BIO_printf(bio_err,"\n");
298
299 goto end;
300 }
301 argc--;
302 argv++;
303 }
304
305 #ifndef OPENSSL_NO_ENGINE
306 e = setup_engine(bio_err, engine, 0);
307 #endif
308
309 if (md && (dgst=EVP_get_digestbyname(md)) == NULL)
310 {
311 BIO_printf(bio_err,"%s is an unsupported message digest type\n",md);
312 goto end;
313 }
314
315 if (dgst == NULL)
316 {
317 dgst = EVP_md5();
318 }
319
320 if (bufsize != NULL)
321 {
322 unsigned long n;
323
324 for (n=0; *bufsize; bufsize++)
325 {
326 i= *bufsize;
327 if ((i <= '9') && (i >= '0'))
328 n=n*10+i-'0';
329 else if (i == 'k')
330 {
331 n*=1024;
332 bufsize++;
333 break;
334 }
335 }
336 if (*bufsize != '\0')
337 {
338 BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
339 goto end;
340 }
341
342 /* It must be large enough for a base64 encoded line */
343 if (n < 80) n=80;
344
345 bsize=(int)n;
346 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
347 }
348
349 strbuf=OPENSSL_malloc(SIZE);
350 buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize));
351 if ((buff == NULL) || (strbuf == NULL))
352 {
353 BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
354 goto end;
355 }
356
357 in=BIO_new(BIO_s_file());
358 out=BIO_new(BIO_s_file());
359 if ((in == NULL) || (out == NULL))
360 {
361 ERR_print_errors(bio_err);
362 goto end;
363 }
364 if (debug)
365 {
366 BIO_set_callback(in,BIO_debug_callback);
367 BIO_set_callback(out,BIO_debug_callback);
368 BIO_set_callback_arg(in,bio_err);
369 BIO_set_callback_arg(out,bio_err);
370 }
371
372 if (inf == NULL)
373 BIO_set_fp(in,stdin,BIO_NOCLOSE);
374 else
375 {
376 if (BIO_read_filename(in,inf) <= 0)
377 {
378 perror(inf);
379 goto end;
380 }
381 }
382
383 if(!str && passarg) {
384 if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
385 BIO_printf(bio_err, "Error getting password\n");
386 goto end;
387 }
388 str = pass;
389 }
390
391 if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
392 {
393 for (;;)
394 {
395 char buf[200];
396
397 BIO_snprintf(buf,sizeof buf,"enter %s %s password:",
398 OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
399 (enc)?"encryption":"decryption");
400 strbuf[0]='\0';
401 i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
402 if (i == 0)
403 {
404 if (strbuf[0] == '\0')
405 {
406 ret=1;
407 goto end;
408 }
409 str=strbuf;
410 break;
411 }
412 if (i < 0)
413 {
414 BIO_printf(bio_err,"bad password read\n");
415 goto end;
416 }
417 }
418 }
419
420
421 if (outf == NULL)
422 {
423 BIO_set_fp(out,stdout,BIO_NOCLOSE);
424 #ifdef OPENSSL_SYS_VMS
425 {
426 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
427 out = BIO_push(tmpbio, out);
428 }
429 #endif
430 }
431 else
432 {
433 if (BIO_write_filename(out,outf) <= 0)
434 {
435 perror(outf);
436 goto end;
437 }
438 }
439
440 rbio=in;
441 wbio=out;
442
443 if (base64)
444 {
445 if ((b64=BIO_new(BIO_f_base64())) == NULL)
446 goto end;
447 if (debug)
448 {
449 BIO_set_callback(b64,BIO_debug_callback);
450 BIO_set_callback_arg(b64,bio_err);
451 }
452 if (olb64)
453 BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
454 if (enc)
455 wbio=BIO_push(b64,wbio);
456 else
457 rbio=BIO_push(b64,rbio);
458 }
459
460 if (cipher != NULL)
461 {
462 /* Note that str is NULL if a key was passed on the command
463 * line, so we get no salt in that case. Is this a bug?
464 */
465 if (str != NULL)
466 {
467 /* Salt handling: if encrypting generate a salt and
468 * write to output BIO. If decrypting read salt from
469 * input BIO.
470 */
471 unsigned char *sptr;
472 if(nosalt) sptr = NULL;
473 else {
474 if(enc) {
475 if(hsalt) {
476 if(!set_hex(hsalt,salt,sizeof salt)) {
477 BIO_printf(bio_err,
478 "invalid hex salt value\n");
479 goto end;
480 }
481 } else if (RAND_pseudo_bytes(salt, sizeof salt) < 0)
482 goto end;
483 /* If -P option then don't bother writing */
484 if((printkey != 2)
485 && (BIO_write(wbio,magic,
486 sizeof magic-1) != sizeof magic-1
487 || BIO_write(wbio,
488 (char *)salt,
489 sizeof salt) != sizeof salt)) {
490 BIO_printf(bio_err,"error writing output file\n");
491 goto end;
492 }
493 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
494 || BIO_read(rbio,
495 (unsigned char *)salt,
496 sizeof salt) != sizeof salt) {
497 BIO_printf(bio_err,"error reading input file\n");
498 goto end;
499 } else if(memcmp(mbuf,magic,sizeof magic-1)) {
500 BIO_printf(bio_err,"bad magic number\n");
501 goto end;
502 }
503
504 sptr = salt;
505 }
506
507 EVP_BytesToKey(cipher,dgst,sptr,
508 (unsigned char *)str,
509 strlen(str),1,key,iv);
510 /* zero the complete buffer or the string
511 * passed from the command line
512 * bug picked up by
513 * Larry J. Hughes Jr. <hughes@indiana.edu> */
514 if (str == strbuf)
515 OPENSSL_cleanse(str,SIZE);
516 else
517 OPENSSL_cleanse(str,strlen(str));
518 }
519 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv))
520 {
521 BIO_printf(bio_err,"invalid hex iv value\n");
522 goto end;
523 }
524 if ((hiv == NULL) && (str == NULL))
525 {
526 /* No IV was explicitly set and no IV was generated
527 * during EVP_BytesToKey. Hence the IV is undefined,
528 * making correct decryption impossible. */
529 BIO_printf(bio_err, "iv undefined\n");
530 goto end;
531 }
532 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key))
533 {
534 BIO_printf(bio_err,"invalid hex key value\n");
535 goto end;
536 }
537
538 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
539 goto end;
540
541 /* Since we may be changing parameters work on the encryption
542 * context rather than calling BIO_set_cipher().
543 */
544
545 BIO_get_cipher_ctx(benc, &ctx);
546 if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc))
547 {
548 BIO_printf(bio_err, "Error setting cipher %s\n",
549 EVP_CIPHER_name(cipher));
550 ERR_print_errors(bio_err);
551 goto end;
552 }
553
554 if (nopad)
555 EVP_CIPHER_CTX_set_padding(ctx, 0);
556
557 if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc))
558 {
559 BIO_printf(bio_err, "Error setting cipher %s\n",
560 EVP_CIPHER_name(cipher));
561 ERR_print_errors(bio_err);
562 goto end;
563 }
564
565 if (debug)
566 {
567 BIO_set_callback(benc,BIO_debug_callback);
568 BIO_set_callback_arg(benc,bio_err);
569 }
570
571 if (printkey)
572 {
573 if (!nosalt)
574 {
575 printf("salt=");
576 for (i=0; i<(int)sizeof(salt); i++)
577 printf("%02X",salt[i]);
578 printf("\n");
579 }
580 if (cipher->key_len > 0)
581 {
582 printf("key=");
583 for (i=0; i<cipher->key_len; i++)
584 printf("%02X",key[i]);
585 printf("\n");
586 }
587 if (cipher->iv_len > 0)
588 {
589 printf("iv =");
590 for (i=0; i<cipher->iv_len; i++)
591 printf("%02X",iv[i]);
592 printf("\n");
593 }
594 if (printkey == 2)
595 {
596 ret=0;
597 goto end;
598 }
599 }
600 }
601
602 /* Only encrypt/decrypt as we write the file */
603 if (benc != NULL)
604 wbio=BIO_push(benc,wbio);
605
606 for (;;)
607 {
608 inl=BIO_read(rbio,(char *)buff,bsize);
609 if (inl <= 0) break;
610 if (BIO_write(wbio,(char *)buff,inl) != inl)
611 {
612 BIO_printf(bio_err,"error writing output file\n");
613 goto end;
614 }
615 }
616 if (!BIO_flush(wbio))
617 {
618 BIO_printf(bio_err,"bad decrypt\n");
619 goto end;
620 }
621
622 ret=0;
623 if (verbose)
624 {
625 BIO_printf(bio_err,"bytes read :%8ld\n",BIO_number_read(in));
626 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
627 }
628 end:
629 ERR_print_errors(bio_err);
630 if (strbuf != NULL) OPENSSL_free(strbuf);
631 if (buff != NULL) OPENSSL_free(buff);
632 if (in != NULL) BIO_free(in);
633 if (out != NULL) BIO_free_all(out);
634 if (benc != NULL) BIO_free(benc);
635 if (b64 != NULL) BIO_free(b64);
636 if(pass) OPENSSL_free(pass);
637 apps_shutdown();
638 OPENSSL_EXIT(ret);
639 }
640
set_hex(char * in,unsigned char * out,int size)641 int set_hex(char *in, unsigned char *out, int size)
642 {
643 int i,n;
644 unsigned char j;
645
646 n=strlen(in);
647 if (n > (size*2))
648 {
649 BIO_printf(bio_err,"hex string is too long\n");
650 return(0);
651 }
652 memset(out,0,size);
653 for (i=0; i<n; i++)
654 {
655 j=(unsigned char)*in;
656 *(in++)='\0';
657 if (j == 0) break;
658 if ((j >= '0') && (j <= '9'))
659 j-='0';
660 else if ((j >= 'A') && (j <= 'F'))
661 j=j-'A'+10;
662 else if ((j >= 'a') && (j <= 'f'))
663 j=j-'a'+10;
664 else
665 {
666 BIO_printf(bio_err,"non-hex digit\n");
667 return(0);
668 }
669 if (i&1)
670 out[i/2]|=j;
671 else
672 out[i/2]=(j<<4);
673 }
674 return(1);
675 }
676