Fix email address delete code.
[openssl.git] / apps / enc.c
1 /* apps/enc.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young (eay@cryptsoft.com).
7  * The implementation was written so as to conform with Netscapes SSL.
8  * 
9  * This library is free for commercial and non-commercial use as long as
10  * the following conditions are aheared to.  The following conditions
11  * apply to all code found in this distribution, be it the RC4, RSA,
12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13  * included with this distribution is covered by the same copyright terms
14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15  * 
16  * Copyright remains Eric Young's, and as such any Copyright notices in
17  * the code are not to be removed.
18  * If this package is used in a product, Eric Young should be given attribution
19  * as the author of the parts of the library used.
20  * This can be in the form of a textual message at program startup or
21  * in documentation (online or textual) provided with the package.
22  * 
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
26  * 1. Redistributions of source code must retain the copyright
27  *    notice, this list of conditions and the following disclaimer.
28  * 2. Redistributions in binary form must reproduce the above copyright
29  *    notice, this list of conditions and the following disclaimer in the
30  *    documentation and/or other materials provided with the distribution.
31  * 3. All advertising materials mentioning features or use of this software
32  *    must display the following acknowledgement:
33  *    "This product includes cryptographic software written by
34  *     Eric Young (eay@cryptsoft.com)"
35  *    The word 'cryptographic' can be left out if the rouines from the library
36  *    being used are not cryptographic related :-).
37  * 4. If you include any Windows specific code (or a derivative thereof) from 
38  *    the apps directory (application code) you must include an acknowledgement:
39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40  * 
41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  * 
53  * The licence and distribution terms for any publically available version or
54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55  * copied and put under another distribution licence
56  * [including the GNU Public Licence.]
57  */
58
59 #include <stdio.h>
60 #include <stdlib.h>
61 #include <string.h>
62 #include "apps.h"
63 #include <openssl/bio.h>
64 #include <openssl/err.h>
65 #include <openssl/evp.h>
66 #include <openssl/objects.h>
67 #include <openssl/x509.h>
68 #include <openssl/rand.h>
69 #include <openssl/pem.h>
70 #include <ctype.h>
71
72 int set_hex(char *in,unsigned char *out,int size);
73 #undef SIZE
74 #undef BSIZE
75 #undef PROG
76
77 #define SIZE    (512)
78 #define BSIZE   (8*1024)
79 #define PROG    enc_main
80
81 void show_ciphers(const OBJ_NAME *name,void *bio_)
82         {
83         BIO *bio=bio_;
84         static int n;
85
86         if(!islower((unsigned char)*name->name))
87                 return;
88
89         BIO_printf(bio,"-%-25s",name->name);
90         if(++n == 3)
91                 {
92                 BIO_printf(bio,"\n");
93                 n=0;
94                 }
95         else
96                 BIO_printf(bio," ");
97         }
98
99 int MAIN(int, char **);
100
101 int MAIN(int argc, char **argv)
102         {
103         ENGINE *e = NULL;
104         static const char magic[]="Salted__";
105         char mbuf[8];   /* should be 1 smaller than magic */
106         char *strbuf=NULL;
107         unsigned char *buff=NULL,*bufsize=NULL;
108         int bsize=BSIZE,verbose=0;
109         int ret=1,inl;
110         int nopad = 0;
111         unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH];
112         unsigned char salt[PKCS5_SALT_LEN];
113         char *str=NULL, *passarg = NULL, *pass = NULL;
114         char *hkey=NULL,*hiv=NULL,*hsalt = NULL;
115         int enc=1,printkey=0,i,base64=0;
116         int debug=0,olb64=0,nosalt=0;
117         const EVP_CIPHER *cipher=NULL,*c;
118         char *inf=NULL,*outf=NULL;
119         BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
120 #define PROG_NAME_SIZE  16
121         char pname[PROG_NAME_SIZE];
122         char *engine = NULL;
123
124         apps_startup();
125
126         if (bio_err == NULL)
127                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
128                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
129
130         /* first check the program name */
131         program_name(argv[0],pname,PROG_NAME_SIZE);
132         if (strcmp(pname,"base64") == 0)
133                 base64=1;
134
135         cipher=EVP_get_cipherbyname(pname);
136         if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
137                 {
138                 BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
139                 goto bad;
140                 }
141
142         argc--;
143         argv++;
144         while (argc >= 1)
145                 {
146                 if      (strcmp(*argv,"-e") == 0)
147                         enc=1;
148                 else if (strcmp(*argv,"-in") == 0)
149                         {
150                         if (--argc < 1) goto bad;
151                         inf= *(++argv);
152                         }
153                 else if (strcmp(*argv,"-out") == 0)
154                         {
155                         if (--argc < 1) goto bad;
156                         outf= *(++argv);
157                         }
158                 else if (strcmp(*argv,"-pass") == 0)
159                         {
160                         if (--argc < 1) goto bad;
161                         passarg= *(++argv);
162                         }
163                 else if (strcmp(*argv,"-engine") == 0)
164                         {
165                         if (--argc < 1) goto bad;
166                         engine= *(++argv);
167                         }
168                 else if (strcmp(*argv,"-d") == 0)
169                         enc=0;
170                 else if (strcmp(*argv,"-p") == 0)
171                         printkey=1;
172                 else if (strcmp(*argv,"-v") == 0)
173                         verbose=1;
174                 else if (strcmp(*argv,"-nopad") == 0)
175                         nopad=1;
176                 else if (strcmp(*argv,"-salt") == 0)
177                         nosalt=0;
178                 else if (strcmp(*argv,"-nosalt") == 0)
179                         nosalt=1;
180                 else if (strcmp(*argv,"-debug") == 0)
181                         debug=1;
182                 else if (strcmp(*argv,"-P") == 0)
183                         printkey=2;
184                 else if (strcmp(*argv,"-A") == 0)
185                         olb64=1;
186                 else if (strcmp(*argv,"-a") == 0)
187                         base64=1;
188                 else if (strcmp(*argv,"-base64") == 0)
189                         base64=1;
190                 else if (strcmp(*argv,"-bufsize") == 0)
191                         {
192                         if (--argc < 1) goto bad;
193                         bufsize=(unsigned char *)*(++argv);
194                         }
195                 else if (strcmp(*argv,"-k") == 0)
196                         {
197                         if (--argc < 1) goto bad;
198                         str= *(++argv);
199                         }
200                 else if (strcmp(*argv,"-kfile") == 0)
201                         {
202                         static char buf[128];
203                         FILE *infile;
204                         char *file;
205
206                         if (--argc < 1) goto bad;
207                         file= *(++argv);
208                         infile=fopen(file,"r");
209                         if (infile == NULL)
210                                 {
211                                 BIO_printf(bio_err,"unable to read key from '%s'\n",
212                                         file);
213                                 goto bad;
214                                 }
215                         buf[0]='\0';
216                         fgets(buf,128,infile);
217                         fclose(infile);
218                         i=strlen(buf);
219                         if ((i > 0) &&
220                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
221                                 buf[--i]='\0';
222                         if ((i > 0) &&
223                                 ((buf[i-1] == '\n') || (buf[i-1] == '\r')))
224                                 buf[--i]='\0';
225                         if (i < 1)
226                                 {
227                                 BIO_printf(bio_err,"zero length password\n");
228                                 goto bad;
229                                 }
230                         str=buf;
231                         }
232                 else if (strcmp(*argv,"-K") == 0)
233                         {
234                         if (--argc < 1) goto bad;
235                         hkey= *(++argv);
236                         }
237                 else if (strcmp(*argv,"-S") == 0)
238                         {
239                         if (--argc < 1) goto bad;
240                         hsalt= *(++argv);
241                         }
242                 else if (strcmp(*argv,"-iv") == 0)
243                         {
244                         if (--argc < 1) goto bad;
245                         hiv= *(++argv);
246                         }
247                 else if ((argv[0][0] == '-') &&
248                         ((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
249                         {
250                         cipher=c;
251                         }
252                 else if (strcmp(*argv,"-none") == 0)
253                         cipher=NULL;
254                 else
255                         {
256                         BIO_printf(bio_err,"unknown option '%s'\n",*argv);
257 bad:
258                         BIO_printf(bio_err,"options are\n");
259                         BIO_printf(bio_err,"%-14s input file\n","-in <file>");
260                         BIO_printf(bio_err,"%-14s output file\n","-out <file>");
261                         BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>");
262                         BIO_printf(bio_err,"%-14s encrypt\n","-e");
263                         BIO_printf(bio_err,"%-14s decrypt\n","-d");
264                         BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
265                         BIO_printf(bio_err,"%-14s key is the next argument\n","-k");
266                         BIO_printf(bio_err,"%-14s key is the first line of the file argument\n","-kfile");
267                         BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
268                         BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
269                         BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
270                         BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e");
271
272                         BIO_printf(bio_err,"Cipher Types\n");
273                         OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
274                                                show_ciphers,
275                                                bio_err);
276                         BIO_printf(bio_err,"\n");
277
278                         goto end;
279                         }
280                 argc--;
281                 argv++;
282                 }
283
284         e = setup_engine(bio_err, engine, 0);
285
286         if (bufsize != NULL)
287                 {
288                 unsigned long n;
289
290                 for (n=0; *bufsize; bufsize++)
291                         {
292                         i= *bufsize;
293                         if ((i <= '9') && (i >= '0'))
294                                 n=n*10+i-'0';
295                         else if (i == 'k')
296                                 {
297                                 n*=1024;
298                                 bufsize++;
299                                 break;
300                                 }
301                         }
302                 if (*bufsize != '\0')
303                         {
304                         BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
305                         goto end;
306                         }
307
308                 /* It must be large enough for a base64 encoded line */
309                 if (n < 80) n=80;
310
311                 bsize=(int)n;
312                 if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
313                 }
314
315         strbuf=OPENSSL_malloc(SIZE);
316         buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize));
317         if ((buff == NULL) || (strbuf == NULL))
318                 {
319                 BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
320                 goto end;
321                 }
322
323         in=BIO_new(BIO_s_file());
324         out=BIO_new(BIO_s_file());
325         if ((in == NULL) || (out == NULL))
326                 {
327                 ERR_print_errors(bio_err);
328                 goto end;
329                 }
330         if (debug)
331                 {
332                 BIO_set_callback(in,BIO_debug_callback);
333                 BIO_set_callback(out,BIO_debug_callback);
334                 BIO_set_callback_arg(in,bio_err);
335                 BIO_set_callback_arg(out,bio_err);
336                 }
337
338         if (inf == NULL)
339                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
340         else
341                 {
342                 if (BIO_read_filename(in,inf) <= 0)
343                         {
344                         perror(inf);
345                         goto end;
346                         }
347                 }
348
349         if(!str && passarg) {
350                 if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
351                         BIO_printf(bio_err, "Error getting password\n");
352                         goto end;
353                 }
354                 str = pass;
355         }
356
357         if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
358                 {
359                 for (;;)
360                         {
361                         char buf[200];
362
363                         sprintf(buf,"enter %s %s password:",
364                                 OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
365                                 (enc)?"encryption":"decryption");
366                         strbuf[0]='\0';
367                         i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
368                         if (i == 0)
369                                 {
370                                 if (strbuf[0] == '\0')
371                                         {
372                                         ret=1;
373                                         goto end;
374                                         }
375                                 str=strbuf;
376                                 break;
377                                 }
378                         if (i < 0)
379                                 {
380                                 BIO_printf(bio_err,"bad password read\n");
381                                 goto end;
382                                 }
383                         }
384                 }
385
386
387         if (outf == NULL)
388                 {
389                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
390 #ifdef OPENSSL_SYS_VMS
391                 {
392                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
393                 out = BIO_push(tmpbio, out);
394                 }
395 #endif
396                 }
397         else
398                 {
399                 if (BIO_write_filename(out,outf) <= 0)
400                         {
401                         perror(outf);
402                         goto end;
403                         }
404                 }
405
406         rbio=in;
407         wbio=out;
408
409         if (base64)
410                 {
411                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
412                         goto end;
413                 if (debug)
414                         {
415                         BIO_set_callback(b64,BIO_debug_callback);
416                         BIO_set_callback_arg(b64,bio_err);
417                         }
418                 if (olb64)
419                         BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
420                 if (enc)
421                         wbio=BIO_push(b64,wbio);
422                 else
423                         rbio=BIO_push(b64,rbio);
424                 }
425
426         if (cipher != NULL)
427                 {
428                 /* Note that str is NULL if a key was passed on the command
429                  * line, so we get no salt in that case. Is this a bug?
430                  */
431                 if (str != NULL)
432                         {
433                         /* Salt handling: if encrypting generate a salt and
434                          * write to output BIO. If decrypting read salt from
435                          * input BIO.
436                          */
437                         unsigned char *sptr;
438                         if(nosalt) sptr = NULL;
439                         else {
440                                 if(enc) {
441                                         if(hsalt) {
442                                                 if(!set_hex(hsalt,salt,PKCS5_SALT_LEN)) {
443                                                         BIO_printf(bio_err,
444                                                                 "invalid hex salt value\n");
445                                                         goto end;
446                                                 }
447                                         } else if (RAND_pseudo_bytes(salt, PKCS5_SALT_LEN) < 0)
448                                                 goto end;
449                                         /* If -P option then don't bother writing */
450                                         if((printkey != 2)
451                                            && (BIO_write(wbio,magic,
452                                                          sizeof magic-1) != sizeof magic-1
453                                                || BIO_write(wbio,
454                                                             (char *)salt,
455                                                             PKCS5_SALT_LEN) != PKCS5_SALT_LEN)) {
456                                                 BIO_printf(bio_err,"error writing output file\n");
457                                                 goto end;
458                                         }
459                                 } else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
460                                           || BIO_read(rbio,
461                                                       (unsigned char *)salt,
462                                     PKCS5_SALT_LEN) != PKCS5_SALT_LEN) {
463                                         BIO_printf(bio_err,"error reading input file\n");
464                                         goto end;
465                                 } else if(memcmp(mbuf,magic,sizeof magic-1)) {
466                                     BIO_printf(bio_err,"bad magic number\n");
467                                     goto end;
468                                 }
469
470                                 sptr = salt;
471                         }
472
473                         EVP_BytesToKey(cipher,EVP_md5(),sptr,
474                                 (unsigned char *)str,
475                                 strlen(str),1,key,iv);
476                         /* zero the complete buffer or the string
477                          * passed from the command line
478                          * bug picked up by
479                          * Larry J. Hughes Jr. <hughes@indiana.edu> */
480                         if (str == strbuf)
481                                 memset(str,0,SIZE);
482                         else
483                                 memset(str,0,strlen(str));
484                         }
485                 if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv))
486                         {
487                         BIO_printf(bio_err,"invalid hex iv value\n");
488                         goto end;
489                         }
490                 if ((hiv == NULL) && (str == NULL))
491                         {
492                         /* No IV was explicitly set and no IV was generated
493                          * during EVP_BytesToKey. Hence the IV is undefined,
494                          * making correct decryption impossible. */
495                         BIO_printf(bio_err, "iv undefined\n");
496                         goto end;
497                         }
498                 if ((hkey != NULL) && !set_hex(hkey,key,sizeof key))
499                         {
500                         BIO_printf(bio_err,"invalid hex key value\n");
501                         goto end;
502                         }
503
504                 if ((benc=BIO_new(BIO_f_cipher())) == NULL)
505                         goto end;
506                 BIO_set_cipher(benc,cipher,key,iv,enc);
507                 if (nopad)
508                         {
509                         EVP_CIPHER_CTX *ctx;
510                         BIO_get_cipher_ctx(benc, &ctx);
511                         EVP_CIPHER_CTX_set_padding(ctx, 0);
512                         }
513                 if (debug)
514                         {
515                         BIO_set_callback(benc,BIO_debug_callback);
516                         BIO_set_callback_arg(benc,bio_err);
517                         }
518
519                 if (printkey)
520                         {
521                         if (!nosalt)
522                                 {
523                                 printf("salt=");
524                                 for (i=0; i<PKCS5_SALT_LEN; i++)
525                                         printf("%02X",salt[i]);
526                                 printf("\n");
527                                 }
528                         if (cipher->key_len > 0)
529                                 {
530                                 printf("key=");
531                                 for (i=0; i<cipher->key_len; i++)
532                                         printf("%02X",key[i]);
533                                 printf("\n");
534                                 }
535                         if (cipher->iv_len > 0)
536                                 {
537                                 printf("iv =");
538                                 for (i=0; i<cipher->iv_len; i++)
539                                         printf("%02X",iv[i]);
540                                 printf("\n");
541                                 }
542                         if (printkey == 2)
543                                 {
544                                 ret=0;
545                                 goto end;
546                                 }
547                         }
548                 }
549
550         /* Only encrypt/decrypt as we write the file */
551         if (benc != NULL)
552                 wbio=BIO_push(benc,wbio);
553
554         for (;;)
555                 {
556                 inl=BIO_read(rbio,(char *)buff,bsize);
557                 if (inl <= 0) break;
558                 if (BIO_write(wbio,(char *)buff,inl) != inl)
559                         {
560                         BIO_printf(bio_err,"error writing output file\n");
561                         goto end;
562                         }
563                 }
564         if (!BIO_flush(wbio))
565                 {
566                 BIO_printf(bio_err,"bad decrypt\n");
567                 goto end;
568                 }
569
570         ret=0;
571         if (verbose)
572                 {
573                 BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
574                 BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
575                 }
576 end:
577         ERR_print_errors(bio_err);
578         if (strbuf != NULL) OPENSSL_free(strbuf);
579         if (buff != NULL) OPENSSL_free(buff);
580         if (in != NULL) BIO_free(in);
581         if (out != NULL) BIO_free_all(out);
582         if (benc != NULL) BIO_free(benc);
583         if (b64 != NULL) BIO_free(b64);
584         if(pass) OPENSSL_free(pass);
585         apps_shutdown();
586         EXIT(ret);
587         }
588
589 int set_hex(char *in, unsigned char *out, int size)
590         {
591         int i,n;
592         unsigned char j;
593
594         n=strlen(in);
595         if (n > (size*2))
596                 {
597                 BIO_printf(bio_err,"hex string is too long\n");
598                 return(0);
599                 }
600         memset(out,0,size);
601         for (i=0; i<n; i++)
602                 {
603                 j=(unsigned char)*in;
604                 *(in++)='\0';
605                 if (j == 0) break;
606                 if ((j >= '0') && (j <= '9'))
607                         j-='0';
608                 else if ((j >= 'A') && (j <= 'F'))
609                         j=j-'A'+10;
610                 else if ((j >= 'a') && (j <= 'f'))
611                         j=j-'a'+10;
612                 else
613                         {
614                         BIO_printf(bio_err,"non-hex digit\n");
615                         return(0);
616                         }
617                 if (i&1)
618                         out[i/2]|=j;
619                 else
620                         out[i/2]=(j<<4);
621                 }
622         return(1);
623         }