Document extension clash.
[openssl.git] / apps / passwd.c
1 /* apps/passwd.c */
2
3 #if defined OPENSSL_NO_MD5 || defined CHARSET_EBCDIC
4 # define NO_MD5CRYPT_1
5 #endif
6
7 #if !defined(OPENSSL_NO_DES) || !defined(NO_MD5CRYPT_1)
8
9 #include <assert.h>
10 #include <string.h>
11
12 #include "apps.h"
13
14 #include <openssl/bio.h>
15 #include <openssl/err.h>
16 #include <openssl/evp.h>
17 #include <openssl/rand.h>
18 #ifndef OPENSSL_NO_DES
19 # include <openssl/des.h>
20 #endif
21 #ifndef NO_MD5CRYPT_1
22 # include <openssl/md5.h>
23 #endif
24
25
26 #undef PROG
27 #define PROG passwd_main
28
29
30 static unsigned const char cov_2char[64]={
31         /* from crypto/des/fcrypt.c */
32         0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
33         0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
34         0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
35         0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
36         0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
37         0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
38         0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
39         0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
40 };
41
42 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
43         char *passwd, BIO *out, int quiet, int table, int reverse,
44         size_t pw_maxlen, int usecrypt, int use1, int useapr1);
45
46 /* -crypt        - standard Unix password algorithm (default)
47  * -1            - MD5-based password algorithm
48  * -apr1         - MD5-based password algorithm, Apache variant
49  * -salt string  - salt
50  * -in file      - read passwords from file
51  * -stdin        - read passwords from stdin
52  * -noverify     - never verify when reading password from terminal
53  * -quiet        - no warnings
54  * -table        - format output as table
55  * -reverse      - switch table columns
56  */
57
58 int MAIN(int, char **);
59
60 int MAIN(int argc, char **argv)
61         {
62         int ret = 1;
63         char *infile = NULL;
64         int in_stdin = 0;
65         int in_noverify = 0;
66         char *salt = NULL, *passwd = NULL, **passwds = NULL;
67         char *salt_malloc = NULL, *passwd_malloc = NULL;
68         size_t passwd_malloc_size = 0;
69         int pw_source_defined = 0;
70         BIO *in = NULL, *out = NULL;
71         int i, badopt, opt_done;
72         int passed_salt = 0, quiet = 0, table = 0, reverse = 0;
73         int usecrypt = 0, use1 = 0, useapr1 = 0;
74         size_t pw_maxlen = 0;
75
76         apps_startup();
77
78         if (bio_err == NULL)
79                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
80                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
81
82         if (!load_config(bio_err, NULL))
83                 goto err;
84         out = BIO_new(BIO_s_file());
85         if (out == NULL)
86                 goto err;
87         BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
88 #ifdef OPENSSL_SYS_VMS
89         {
90         BIO *tmpbio = BIO_new(BIO_f_linebuffer());
91         out = BIO_push(tmpbio, out);
92         }
93 #endif
94
95         badopt = 0, opt_done = 0;
96         i = 0;
97         while (!badopt && !opt_done && argv[++i] != NULL)
98                 {
99                 if (strcmp(argv[i], "-crypt") == 0)
100                         usecrypt = 1;
101                 else if (strcmp(argv[i], "-1") == 0)
102                         use1 = 1;
103                 else if (strcmp(argv[i], "-apr1") == 0)
104                         useapr1 = 1;
105                 else if (strcmp(argv[i], "-salt") == 0)
106                         {
107                         if ((argv[i+1] != NULL) && (salt == NULL))
108                                 {
109                                 passed_salt = 1;
110                                 salt = argv[++i];
111                                 }
112                         else
113                                 badopt = 1;
114                         }
115                 else if (strcmp(argv[i], "-in") == 0)
116                         {
117                         if ((argv[i+1] != NULL) && !pw_source_defined)
118                                 {
119                                 pw_source_defined = 1;
120                                 infile = argv[++i];
121                                 }
122                         else
123                                 badopt = 1;
124                         }
125                 else if (strcmp(argv[i], "-stdin") == 0)
126                         {
127                         if (!pw_source_defined)
128                                 {
129                                 pw_source_defined = 1;
130                                 in_stdin = 1;
131                                 }
132                         else
133                                 badopt = 1;
134                         }
135                 else if (strcmp(argv[i], "-noverify") == 0)
136                         in_noverify = 1;
137                 else if (strcmp(argv[i], "-quiet") == 0)
138                         quiet = 1;
139                 else if (strcmp(argv[i], "-table") == 0)
140                         table = 1;
141                 else if (strcmp(argv[i], "-reverse") == 0)
142                         reverse = 1;
143                 else if (argv[i][0] == '-')
144                         badopt = 1;
145                 else if (!pw_source_defined)
146                         /* non-option arguments, use as passwords */
147                         {
148                         pw_source_defined = 1;
149                         passwds = &argv[i];
150                         opt_done = 1;
151                         }
152                 else
153                         badopt = 1;
154                 }
155
156         if (!usecrypt && !use1 && !useapr1) /* use default */
157                 usecrypt = 1;
158         if (usecrypt + use1 + useapr1 > 1) /* conflict */
159                 badopt = 1;
160
161         /* reject unsupported algorithms */
162 #ifdef OPENSSL_NO_DES
163         if (usecrypt) badopt = 1;
164 #endif
165 #ifdef NO_MD5CRYPT_1
166         if (use1 || useapr1) badopt = 1;
167 #endif
168
169         if (badopt) 
170                 {
171                 BIO_printf(bio_err, "Usage: passwd [options] [passwords]\n");
172                 BIO_printf(bio_err, "where options are\n");
173 #ifndef OPENSSL_NO_DES
174                 BIO_printf(bio_err, "-crypt             standard Unix password algorithm (default)\n");
175 #endif
176 #ifndef NO_MD5CRYPT_1
177                 BIO_printf(bio_err, "-1                 MD5-based password algorithm\n");
178                 BIO_printf(bio_err, "-apr1              MD5-based password algorithm, Apache variant\n");
179 #endif
180                 BIO_printf(bio_err, "-salt string       use provided salt\n");
181                 BIO_printf(bio_err, "-in file           read passwords from file\n");
182                 BIO_printf(bio_err, "-stdin             read passwords from stdin\n");
183                 BIO_printf(bio_err, "-noverify          never verify when reading password from terminal\n");
184                 BIO_printf(bio_err, "-quiet             no warnings\n");
185                 BIO_printf(bio_err, "-table             format output as table\n");
186                 BIO_printf(bio_err, "-reverse           switch table columns\n");
187                 
188                 goto err;
189                 }
190
191         if ((infile != NULL) || in_stdin)
192                 {
193                 in = BIO_new(BIO_s_file());
194                 if (in == NULL)
195                         goto err;
196                 if (infile != NULL)
197                         {
198                         assert(in_stdin == 0);
199                         if (BIO_read_filename(in, infile) <= 0)
200                                 goto err;
201                         }
202                 else
203                         {
204                         assert(in_stdin);
205                         BIO_set_fp(in, stdin, BIO_NOCLOSE);
206                         }
207                 }
208         
209         if (usecrypt)
210                 pw_maxlen = 8;
211         else if (use1 || useapr1)
212                 pw_maxlen = 256; /* arbitrary limit, should be enough for most passwords */
213
214         if (passwds == NULL)
215                 {
216                 /* no passwords on the command line */
217
218                 passwd_malloc_size = pw_maxlen + 2;
219                 /* longer than necessary so that we can warn about truncation */
220                 passwd = passwd_malloc = OPENSSL_malloc(passwd_malloc_size);
221                 if (passwd_malloc == NULL)
222                         goto err;
223                 }
224
225         if ((in == NULL) && (passwds == NULL))
226                 {
227                 /* build a null-terminated list */
228                 static char *passwds_static[2] = {NULL, NULL};
229                 
230                 passwds = passwds_static;
231                 if (in == NULL)
232                         if (EVP_read_pw_string(passwd_malloc, passwd_malloc_size, "Password: ", !(passed_salt || in_noverify)) != 0)
233                                 goto err;
234                 passwds[0] = passwd_malloc;
235                 }
236
237         if (in == NULL)
238                 {
239                 assert(passwds != NULL);
240                 assert(*passwds != NULL);
241                 
242                 do /* loop over list of passwords */
243                         {
244                         passwd = *passwds++;
245                         if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out,
246                                 quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1))
247                                 goto err;
248                         }
249                 while (*passwds != NULL);
250                 }
251         else
252                 /* in != NULL */
253                 {
254                 int done;
255
256                 assert (passwd != NULL);
257                 do
258                         {
259                         int r = BIO_gets(in, passwd, pw_maxlen + 1);
260                         if (r > 0)
261                                 {
262                                 char *c = (strchr(passwd, '\n')) ;
263                                 if (c != NULL)
264                                         *c = 0; /* truncate at newline */
265                                 else
266                                         {
267                                         /* ignore rest of line */
268                                         char trash[BUFSIZ];
269                                         do
270                                                 r = BIO_gets(in, trash, sizeof trash);
271                                         while ((r > 0) && (!strchr(trash, '\n')));
272                                         }
273                                 
274                                 if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out,
275                                         quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1))
276                                         goto err;
277                                 }
278                         done = (r <= 0);
279                         }
280                 while (!done);
281                 }
282         ret = 0;
283
284 err:
285         ERR_print_errors(bio_err);
286         if (salt_malloc)
287                 OPENSSL_free(salt_malloc);
288         if (passwd_malloc)
289                 OPENSSL_free(passwd_malloc);
290         if (in)
291                 BIO_free(in);
292         if (out)
293                 BIO_free_all(out);
294         apps_shutdown();
295         OPENSSL_EXIT(ret);
296         }
297
298
299 #ifndef NO_MD5CRYPT_1
300 /* MD5-based password algorithm (should probably be available as a library
301  * function; then the static buffer would not be acceptable).
302  * For magic string "1", this should be compatible to the MD5-based BSD
303  * password algorithm.
304  * For 'magic' string "apr1", this is compatible to the MD5-based Apache
305  * password algorithm.
306  * (Apparently, the Apache password algorithm is identical except that the
307  * 'magic' string was changed -- the laziest application of the NIH principle
308  * I've ever encountered.)
309  */
310 static char *md5crypt(const char *passwd, const char *magic, const char *salt)
311         {
312         static char out_buf[6 + 9 + 24 + 2]; /* "$apr1$..salt..$.......md5hash..........\0" */
313         unsigned char buf[MD5_DIGEST_LENGTH];
314         char *salt_out;
315         int n;
316         unsigned int i;
317         EVP_MD_CTX md,md2;
318         size_t passwd_len, salt_len;
319
320         passwd_len = strlen(passwd);
321         out_buf[0] = '$';
322         out_buf[1] = 0;
323         assert(strlen(magic) <= 4); /* "1" or "apr1" */
324         strncat(out_buf, magic, 4);
325         strncat(out_buf, "$", 1);
326         strncat(out_buf, salt, 8);
327         assert(strlen(out_buf) <= 6 + 8); /* "$apr1$..salt.." */
328         salt_out = out_buf + 2 + strlen(magic);
329         salt_len = strlen(salt_out);
330         assert(salt_len <= 8);
331         
332         EVP_MD_CTX_init(&md);
333         EVP_DigestInit_ex(&md,EVP_md5(), NULL);
334         EVP_DigestUpdate(&md, passwd, passwd_len);
335         EVP_DigestUpdate(&md, "$", 1);
336         EVP_DigestUpdate(&md, magic, strlen(magic));
337         EVP_DigestUpdate(&md, "$", 1);
338         EVP_DigestUpdate(&md, salt_out, salt_len);
339         
340         EVP_MD_CTX_init(&md2);
341         EVP_DigestInit_ex(&md2,EVP_md5(), NULL);
342         EVP_DigestUpdate(&md2, passwd, passwd_len);
343         EVP_DigestUpdate(&md2, salt_out, salt_len);
344         EVP_DigestUpdate(&md2, passwd, passwd_len);
345         EVP_DigestFinal_ex(&md2, buf, NULL);
346
347         for (i = passwd_len; i > sizeof buf; i -= sizeof buf)
348                 EVP_DigestUpdate(&md, buf, sizeof buf);
349         EVP_DigestUpdate(&md, buf, i);
350         
351         n = passwd_len;
352         while (n)
353                 {
354                 EVP_DigestUpdate(&md, (n & 1) ? "\0" : passwd, 1);
355                 n >>= 1;
356                 }
357         EVP_DigestFinal_ex(&md, buf, NULL);
358
359         for (i = 0; i < 1000; i++)
360                 {
361                 EVP_DigestInit_ex(&md2,EVP_md5(), NULL);
362                 EVP_DigestUpdate(&md2, (i & 1) ? (unsigned const char *) passwd : buf,
363                                        (i & 1) ? passwd_len : sizeof buf);
364                 if (i % 3)
365                         EVP_DigestUpdate(&md2, salt_out, salt_len);
366                 if (i % 7)
367                         EVP_DigestUpdate(&md2, passwd, passwd_len);
368                 EVP_DigestUpdate(&md2, (i & 1) ? buf : (unsigned const char *) passwd,
369                                        (i & 1) ? sizeof buf : passwd_len);
370                 EVP_DigestFinal_ex(&md2, buf, NULL);
371                 }
372         EVP_MD_CTX_cleanup(&md2);
373         
374          {
375                 /* transform buf into output string */
376         
377                 unsigned char buf_perm[sizeof buf];
378                 int dest, source;
379                 char *output;
380
381                 /* silly output permutation */
382                 for (dest = 0, source = 0; dest < 14; dest++, source = (source + 6) % 17)
383                         buf_perm[dest] = buf[source];
384                 buf_perm[14] = buf[5];
385                 buf_perm[15] = buf[11];
386 #ifndef PEDANTIC /* Unfortunately, this generates a "no effect" warning */
387                 assert(16 == sizeof buf_perm);
388 #endif
389                 
390                 output = salt_out + salt_len;
391                 assert(output == out_buf + strlen(out_buf));
392                 
393                 *output++ = '$';
394
395                 for (i = 0; i < 15; i += 3)
396                         {
397                         *output++ = cov_2char[buf_perm[i+2] & 0x3f];
398                         *output++ = cov_2char[((buf_perm[i+1] & 0xf) << 2) |
399                                                   (buf_perm[i+2] >> 6)];
400                         *output++ = cov_2char[((buf_perm[i] & 3) << 4) |
401                                                   (buf_perm[i+1] >> 4)];
402                         *output++ = cov_2char[buf_perm[i] >> 2];
403                         }
404                 assert(i == 15);
405                 *output++ = cov_2char[buf_perm[i] & 0x3f];
406                 *output++ = cov_2char[buf_perm[i] >> 6];
407                 *output = 0;
408                 assert(strlen(out_buf) < sizeof(out_buf));
409          }
410         EVP_MD_CTX_cleanup(&md);
411
412         return out_buf;
413         }
414 #endif
415
416
417 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
418         char *passwd, BIO *out, int quiet, int table, int reverse,
419         size_t pw_maxlen, int usecrypt, int use1, int useapr1)
420         {
421         char *hash = NULL;
422
423         assert(salt_p != NULL);
424         assert(salt_malloc_p != NULL);
425
426         /* first make sure we have a salt */
427         if (!passed_salt)
428                 {
429 #ifndef OPENSSL_NO_DES
430                 if (usecrypt)
431                         {
432                         if (*salt_malloc_p == NULL)
433                                 {
434                                 *salt_p = *salt_malloc_p = OPENSSL_malloc(3);
435                                 if (*salt_malloc_p == NULL)
436                                         goto err;
437                                 }
438                         if (RAND_pseudo_bytes((unsigned char *)*salt_p, 2) < 0)
439                                 goto err;
440                         (*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */
441                         (*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */
442                         (*salt_p)[2] = 0;
443 #ifdef CHARSET_EBCDIC
444                         ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert
445                                                             * back to ASCII */
446 #endif
447                         }
448 #endif /* !OPENSSL_NO_DES */
449
450 #ifndef NO_MD5CRYPT_1
451                 if (use1 || useapr1)
452                         {
453                         int i;
454                         
455                         if (*salt_malloc_p == NULL)
456                                 {
457                                 *salt_p = *salt_malloc_p = OPENSSL_malloc(9);
458                                 if (*salt_malloc_p == NULL)
459                                         goto err;
460                                 }
461                         if (RAND_pseudo_bytes((unsigned char *)*salt_p, 8) < 0)
462                                 goto err;
463                         
464                         for (i = 0; i < 8; i++)
465                                 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
466                         (*salt_p)[8] = 0;
467                         }
468 #endif /* !NO_MD5CRYPT_1 */
469                 }
470         
471         assert(*salt_p != NULL);
472         
473         /* truncate password if necessary */
474         if ((strlen(passwd) > pw_maxlen))
475                 {
476                 if (!quiet)
477                         /* XXX: really we should know how to print a size_t, not cast it */
478                         BIO_printf(bio_err, "Warning: truncating password to %u characters\n", (unsigned)pw_maxlen);
479                 passwd[pw_maxlen] = 0;
480                 }
481         assert(strlen(passwd) <= pw_maxlen);
482         
483         /* now compute password hash */
484 #ifndef OPENSSL_NO_DES
485         if (usecrypt)
486                 hash = DES_crypt(passwd, *salt_p);
487 #endif
488 #ifndef NO_MD5CRYPT_1
489         if (use1 || useapr1)
490                 hash = md5crypt(passwd, (use1 ? "1" : "apr1"), *salt_p);
491 #endif
492         assert(hash != NULL);
493
494         if (table && !reverse)
495                 BIO_printf(out, "%s\t%s\n", passwd, hash);
496         else if (table && reverse)
497                 BIO_printf(out, "%s\t%s\n", hash, passwd);
498         else
499                 BIO_printf(out, "%s\n", hash);
500         return 1;
501         
502 err:
503         return 0;
504         }
505 #else
506
507 int MAIN(int argc, char **argv)
508         {
509         fputs("Program not available.\n", stderr)
510         OPENSSL_EXIT(1);
511         }
512 #endif