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