6851a9927d310a53d4ef06bbd61eb44a30688377
[openssl.git] / apps / passwd.c
1 /* apps/passwd.c */
2
3 #if defined NO_MD5 || defined CHARSET_EBCDIC
4 # define NO_MD5CRYPT_1
5 #endif
6
7 #if !defined(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
19 #ifndef NO_DES
20 # include <openssl/des.h>
21 #endif
22 #ifndef NO_MD5CRYPT_1
23 # include <openssl/md5.h>
24 #endif
25
26
27 #undef PROG
28 #define PROG passwd_main
29
30
31 static unsigned const char cov_2char[64]={
32         /* from crypto/des/fcrypt.c */
33         0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
34         0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
35         0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
36         0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
37         0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
38         0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
39         0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
40         0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
41 };
42
43 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
44         char *passwd, BIO *out, int quiet, int table, int reverse,
45         size_t pw_maxlen, int usecrypt, int use1, int useapr1);
46
47 /* -crypt        - standard Unix password algorithm (default)
48  * -1            - MD5-based password algorithm
49  * -apr1         - MD5-based password algorithm, Apache variant
50  * -salt string  - salt
51  * -in file      - read passwords from file
52  * -stdin        - read passwords from stdin
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         char *salt = NULL, *passwd = NULL, **passwds = NULL;
66         char *salt_malloc = NULL, *passwd_malloc = NULL;
67         size_t passwd_malloc_size = 0;
68         int pw_source_defined = 0;
69         BIO *in = NULL, *out = NULL;
70         int i, badopt, opt_done;
71         int passed_salt = 0, quiet = 0, table = 0, reverse = 0;
72         int usecrypt = 0, use1 = 0, useapr1 = 0;
73         size_t pw_maxlen = 0;
74
75         apps_startup();
76
77         if (bio_err == NULL)
78                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
79                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
80         out = BIO_new(BIO_s_file());
81         if (out == NULL)
82                 goto err;
83         BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
84 #ifdef VMS
85         {
86         BIO *tmpbio = BIO_new(BIO_f_linebuffer());
87         out = BIO_push(tmpbio, out);
88         }
89 #endif
90
91         badopt = 0, opt_done = 0;
92         i = 0;
93         while (!badopt && !opt_done && argv[++i] != NULL)
94                 {
95                 if (strcmp(argv[i], "-crypt") == 0)
96                         usecrypt = 1;
97                 else if (strcmp(argv[i], "-1") == 0)
98                         use1 = 1;
99                 else if (strcmp(argv[i], "-apr1") == 0)
100                         useapr1 = 1;
101                 else if (strcmp(argv[i], "-salt") == 0)
102                         {
103                         if ((argv[i+1] != NULL) && (salt == NULL))
104                                 {
105                                 passed_salt = 1;
106                                 salt = argv[++i];
107                                 }
108                         else
109                                 badopt = 1;
110                         }
111                 else if (strcmp(argv[i], "-in") == 0)
112                         {
113                         if ((argv[i+1] != NULL) && !pw_source_defined)
114                                 {
115                                 pw_source_defined = 1;
116                                 infile = argv[++i];
117                                 }
118                         else
119                                 badopt = 1;
120                         }
121                 else if (strcmp(argv[i], "-stdin") == 0)
122                         {
123                         if (!pw_source_defined)
124                                 {
125                                 pw_source_defined = 1;
126                                 in_stdin = 1;
127                                 }
128                         else
129                                 badopt = 1;
130                         }
131                 else if (strcmp(argv[i], "-quiet") == 0)
132                         quiet = 1;
133                 else if (strcmp(argv[i], "-table") == 0)
134                         table = 1;
135                 else if (strcmp(argv[i], "-reverse") == 0)
136                         reverse = 1;
137                 else if (argv[i][0] == '-')
138                         badopt = 1;
139                 else if (!pw_source_defined)
140                         /* non-option arguments, use as passwords */
141                         {
142                         pw_source_defined = 1;
143                         passwds = &argv[i];
144                         opt_done = 1;
145                         }
146                 else
147                         badopt = 1;
148                 }
149
150         if (!usecrypt && !use1 && !useapr1) /* use default */
151                 usecrypt = 1;
152         if (usecrypt + use1 + useapr1 > 1) /* conflict */
153                 badopt = 1;
154
155         /* reject unsupported algorithms */
156 #ifdef NO_DES
157         if (usecrypt) badopt = 1;
158 #endif
159 #ifdef NO_MD5CRYPT_1
160         if (use1 || useapr1) badopt = 1;
161 #endif
162
163         if (badopt) 
164                 {
165                 BIO_printf(bio_err, "Usage: passwd [options] [passwords]\n");
166                 BIO_printf(bio_err, "where options are\n");
167 #ifndef NO_DES
168                 BIO_printf(bio_err, "-crypt             standard Unix password algorithm (default)\n");
169 #endif
170 #ifndef NO_MD5CRYPT_1
171                 BIO_printf(bio_err, "-1                 MD5-based password algorithm\n");
172                 BIO_printf(bio_err, "-apr1              MD5-based password algorithm, Apache variant\n");
173 #endif
174                 BIO_printf(bio_err, "-salt string       use provided salt\n");
175                 BIO_printf(bio_err, "-in file           read passwords from file\n");
176                 BIO_printf(bio_err, "-stdin             read passwords from stdin\n");
177                 BIO_printf(bio_err, "-quiet             no warnings\n");
178                 BIO_printf(bio_err, "-table             format output as table\n");
179                 BIO_printf(bio_err, "-reverse           switch table columns\n");
180                 
181                 goto err;
182                 }
183
184         if ((infile != NULL) || in_stdin)
185                 {
186                 in = BIO_new(BIO_s_file());
187                 if (in == NULL)
188                         goto err;
189                 if (infile != NULL)
190                         {
191                         assert(in_stdin == 0);
192                         if (BIO_read_filename(in, infile) <= 0)
193                                 goto err;
194                         }
195                 else
196                         {
197                         assert(in_stdin);
198                         BIO_set_fp(in, stdin, BIO_NOCLOSE);
199                         }
200                 }
201         
202         if (usecrypt)
203                 pw_maxlen = 8;
204         else if (use1 || useapr1)
205                 pw_maxlen = 256; /* arbitrary limit, should be enough for most passwords */
206
207         if (passwds == NULL)
208                 {
209                 /* no passwords on the command line */
210
211                 passwd_malloc_size = pw_maxlen + 2;
212                 /* longer than necessary so that we can warn about truncation */
213                 passwd = passwd_malloc = OPENSSL_malloc(passwd_malloc_size);
214                 if (passwd_malloc == NULL)
215                         goto err;
216                 }
217
218         if ((in == NULL) && (passwds == NULL))
219                 {
220                 /* build a null-terminated list */
221                 static char *passwds_static[2] = {NULL, NULL};
222                 
223                 passwds = passwds_static;
224                 if (in == NULL)
225                         if (EVP_read_pw_string(passwd_malloc, passwd_malloc_size, "Password: ", 0) != 0)
226                                 goto err;
227                 passwds[0] = passwd_malloc;
228                 }
229
230         if (in == NULL)
231                 {
232                 assert(passwds != NULL);
233                 assert(*passwds != NULL);
234                 
235                 do /* loop over list of passwords */
236                         {
237                         passwd = *passwds++;
238                         if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out,
239                                 quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1))
240                                 goto err;
241                         }
242                 while (*passwds != NULL);
243                 }
244         else
245                 /* in != NULL */
246                 {
247                 int done;
248
249                 assert (passwd != NULL);
250                 do
251                         {
252                         int r = BIO_gets(in, passwd, pw_maxlen + 1);
253                         if (r > 0)
254                                 {
255                                 char *c = (strchr(passwd, '\n')) ;
256                                 if (c != NULL)
257                                         *c = 0; /* truncate at newline */
258                                 else
259                                         {
260                                         /* ignore rest of line */
261                                         char trash[BUFSIZ];
262                                         do
263                                                 r = BIO_gets(in, trash, sizeof trash);
264                                         while ((r > 0) && (!strchr(trash, '\n')));
265                                         }
266                                 
267                                 if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out,
268                                         quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1))
269                                         goto err;
270                                 }
271                         done = (r <= 0);
272                         }
273                 while (!done);
274                 }
275
276 err:
277         ERR_print_errors(bio_err);
278         if (salt_malloc)
279                 OPENSSL_free(salt_malloc);
280         if (passwd_malloc)
281                 OPENSSL_free(passwd_malloc);
282         if (in)
283                 BIO_free(in);
284         if (out)
285                 BIO_free_all(out);
286         EXIT(ret);
287         }
288
289
290 #ifndef NO_MD5CRYPT_1
291 /* MD5-based password algorithm (should probably be available as a library
292  * function; then the static buffer would not be acceptable).
293  * For magic string "1", this should be compatible to the MD5-based BSD
294  * password algorithm.
295  * For 'magic' string "apr1", this is compatible to the MD5-based Apache
296  * password algorithm.
297  * (Apparently, the Apache password algorithm is identical except that the
298  * 'magic' string was changed -- the laziest application of the NIH principle
299  * I've ever encountered.)
300  */
301 static char *md5crypt(const char *passwd, const char *magic, const char *salt)
302         {
303         static char out_buf[6 + 9 + 24 + 2]; /* "$apr1$..salt..$.......md5hash..........\0" */
304         unsigned char buf[MD5_DIGEST_LENGTH];
305         char *salt_out;
306         int n, i;
307         MD5_CTX md;
308         size_t passwd_len, salt_len;
309
310         passwd_len = strlen(passwd);
311         out_buf[0] = '$';
312         out_buf[1] = 0;
313         assert(strlen(magic) <= 4); /* "1" or "apr1" */
314         strncat(out_buf, magic, 4);
315         strncat(out_buf, "$", 1);
316         strncat(out_buf, salt, 8);
317         assert(strlen(out_buf) <= 6 + 8); /* "$apr1$..salt.." */
318         salt_out = out_buf + 6;
319         salt_len = strlen(salt_out);
320         assert(salt_len <= 8);
321         
322         MD5_Init(&md);
323         MD5_Update(&md, passwd, passwd_len);
324         MD5_Update(&md, "$", 1);
325         MD5_Update(&md, magic, strlen(magic));
326         MD5_Update(&md, "$", 1);
327         MD5_Update(&md, salt_out, salt_len);
328         
329          {
330                 MD5_CTX md2;
331
332                 MD5_Init(&md2);
333                 MD5_Update(&md2, passwd, passwd_len);
334                 MD5_Update(&md2, salt_out, salt_len);
335                 MD5_Update(&md2, passwd, passwd_len);
336                 MD5_Final(buf, &md2);
337          }
338         for (i = passwd_len; i > sizeof buf; i -= sizeof buf)
339                 MD5_Update(&md, buf, sizeof buf);
340         MD5_Update(&md, buf, i);
341         
342         n = passwd_len;
343         while (n)
344                 {
345                 MD5_Update(&md, (n & 1) ? "\0" : passwd, 1);
346                 n >>= 1;
347                 }
348         MD5_Final(buf, &md);
349
350         for (i = 0; i < 1000; i++)
351                 {
352                 MD5_CTX md2;
353
354                 MD5_Init(&md2);
355                 MD5_Update(&md2, (i & 1) ? (unsigned char *) passwd : buf,
356                                  (i & 1) ? passwd_len : sizeof buf);
357                 if (i % 3)
358                         MD5_Update(&md2, salt_out, salt_len);
359                 if (i % 7)
360                         MD5_Update(&md2, passwd, passwd_len);
361                 MD5_Update(&md2, (i & 1) ? buf : (unsigned char *) passwd,
362                                  (i & 1) ? sizeof buf : passwd_len);
363                 MD5_Final(buf, &md2);
364                 }
365         
366          {
367                 /* transform buf into output string */
368         
369                 unsigned char buf_perm[sizeof buf];
370                 int dest, source;
371                 char *output;
372
373                 /* silly output permutation */
374                 for (dest = 0, source = 0; dest < 14; dest++, source = (source + 6) % 17)
375                         buf_perm[dest] = buf[source];
376                 buf_perm[14] = buf[5];
377                 buf_perm[15] = buf[11];
378 #ifndef PEDANTIC /* Unfortunately, this generates a "no effect" warning */
379                 assert(16 == sizeof buf_perm);
380 #endif
381                 
382                 output = salt_out + salt_len;
383                 assert(output == out_buf + strlen(out_buf));
384                 
385                 *output++ = '$';
386
387                 for (i = 0; i < 15; i += 3)
388                         {
389                         *output++ = cov_2char[buf_perm[i+2] & 0x3f];
390                         *output++ = cov_2char[((buf_perm[i+1] & 0xf) << 2) |
391                                                   (buf_perm[i+2] >> 6)];
392                         *output++ = cov_2char[((buf_perm[i] & 3) << 4) |
393                                                   (buf_perm[i+1] >> 4)];
394                         *output++ = cov_2char[buf_perm[i] >> 2];
395                         }
396                 assert(i == 15);
397                 *output++ = cov_2char[buf_perm[i] & 0x3f];
398                 *output++ = cov_2char[buf_perm[i] >> 6];
399                 *output = 0;
400                 assert(strlen(out_buf) < sizeof(out_buf));
401          }
402
403         return out_buf;
404         }
405 #endif
406
407
408 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
409         char *passwd, BIO *out, int quiet, int table, int reverse,
410         size_t pw_maxlen, int usecrypt, int use1, int useapr1)
411         {
412         char *hash = NULL;
413
414         assert(salt_p != NULL);
415         assert(salt_malloc_p != NULL);
416
417         /* first make sure we have a salt */
418         if (!passed_salt)
419                 {
420 #ifndef NO_DES
421                 if (usecrypt)
422                         {
423                         if (*salt_malloc_p == NULL)
424                                 {
425                                 *salt_p = *salt_malloc_p = OPENSSL_malloc(3);
426                                 if (*salt_malloc_p == NULL)
427                                         goto err;
428                                 }
429                         if (RAND_pseudo_bytes((unsigned char *)*salt_p, 2) < 0)
430                                 goto err;
431                         (*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */
432                         (*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */
433                         (*salt_p)[2] = 0;
434 #ifdef CHARSET_EBCDIC
435                         ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert
436                                                             * back to ASCII */
437 #endif
438                         }
439 #endif /* !NO_DES */
440
441 #ifndef NO_MD5CRYPT_1
442                 if (use1 || useapr1)
443                         {
444                         int i;
445                         
446                         if (*salt_malloc_p == NULL)
447                                 {
448                                 *salt_p = *salt_malloc_p = OPENSSL_malloc(9);
449                                 if (*salt_malloc_p == NULL)
450                                         goto err;
451                                 }
452                         if (RAND_pseudo_bytes((unsigned char *)*salt_p, 8) < 0)
453                                 goto err;
454                         
455                         for (i = 0; i < 8; i++)
456                                 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
457                         (*salt_p)[8] = 0;
458                         }
459 #endif /* !NO_MD5CRYPT_1 */
460                 }
461         
462         assert(*salt_p != NULL);
463         
464         /* truncate password if necessary */
465         if ((strlen(passwd) > pw_maxlen))
466                 {
467                 if (!quiet)
468                         BIO_printf(bio_err, "Warning: truncating password to %u characters\n", pw_maxlen);
469                 passwd[pw_maxlen] = 0;
470                 }
471         assert(strlen(passwd) <= pw_maxlen);
472         
473         /* now compute password hash */
474 #ifndef NO_DES
475         if (usecrypt)
476                 hash = des_crypt(passwd, *salt_p);
477 #endif
478 #ifndef NO_MD5CRYPT_1
479         if (use1 || useapr1)
480                 hash = md5crypt(passwd, (use1 ? "1" : "apr1"), *salt_p);
481 #endif
482         assert(hash != NULL);
483
484         if (table && !reverse)
485                 BIO_printf(out, "%s\t%s\n", passwd, hash);
486         else if (table && reverse)
487                 BIO_printf(out, "%s\t%s\n", hash, passwd);
488         else
489                 BIO_printf(out, "%s\n", hash);
490         return 1;
491         
492 err:
493         return 0;
494         }
495 #else
496
497 int MAIN(int argc, char **argv)
498         {
499         fputs("Program not available.\n", stderr)
500         EXIT(1);
501         }
502 #endif