2 * Copyright 1998, David E. Storey, All rights reserved.
3 * This software is not subject to any license of The Murphy Group, Inc.
4 * or George Mason University.
6 * Redistribution and use in source and binary forms are permitted only
7 * as authorized by the OpenLDAP Public License. A copy of this
8 * license is available at http://www.OpenLDAP.org/license.html or
9 * in file LICENSE in the top-level directory of the distribution.
11 * ldappasswd.c - program to modify passwords in an LDAP tree
13 * Author: David E. Storey <dave@tamos.net>
23 #include <ac/string.h>
24 #include <ac/unistd.h>
29 #include <lutil_md5.h>
30 #include <lutil_sha1.h>
32 #include "ldapconfig.h"
35 #define CEILING(x) ((double)x > (int)x ? (int)x + 1 : (int)x)
36 #define STRDUP(x) (x ? strcpy(malloc(strlen(x) + 1), x) : NULL)
38 #define LDAP_PASSWD_ATTRIB "userPassword"
39 #define LDAP_PASSWD_CONF DEFAULT_SYSCONFDIR"/passwd.conf"
67 char *(*func) (const char *, Salt *);
68 unsigned char takes_salt;
70 HashTypes type_salted;
71 unsigned int default_salt_len;
75 static int noupdates = 0;
76 static int verbose = 0;
77 static int want_entryhash = 0;
78 static int auto_gen_pw = 0;
83 * pw_encode() essentially base64 encodes a password and it's salt
87 pw_encode (unsigned char *passwd, Salt * salt, unsigned int len)
89 int salted = salt && salt->salt && salt->len;
91 char *base64digest = NULL;
92 unsigned char *npasswd = passwd;
96 npasswd = (unsigned char *)malloc (len + salt->len);
97 memcpy (npasswd, passwd, len);
98 memcpy (&npasswd[len], salt->salt, salt->len);
102 b64_len = CEILING (len / 3) * 4 + 1;
103 base64digest = (char *)malloc (b64_len);
104 if (lutil_b64_ntop (npasswd, len, base64digest, b64_len) < 0)
113 return (base64digest);
117 * if you'd like to write a better salt generator, please, be my guest.
121 make_salt (Salt * salt, unsigned int len)
128 /* seed random number generator */
129 gettimeofday (&tv, NULL);
133 salt->salt = (unsigned char *)malloc (len);
135 for (len = 0; len < salt->len; len++)
136 salt->salt[len] = (tv.tv_usec ^ rand ()) & 0xff;
144 gen_pass (unsigned int len)
146 const unsigned char autogen[] =
147 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890.,";
149 Salt salt = {NULL, 0};
151 make_salt (&salt, len);
152 for (i = 0; i < len; i++)
153 salt.salt[i] = autogen[salt.salt[i] % (sizeof (autogen) - 1)];
155 return ((char *)salt.salt);
159 hash_none (const char *pw_in, Salt * salt)
161 return (STRDUP (pw_in));
165 hash_crypt (const char *pw_in, Salt * salt)
167 const unsigned char crypt64[] =
168 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./";
169 char *crypted_pw = NULL;
172 if (salt && salt->salt && strlen ((char *)salt->salt) >= 2)
175 if (!(isalnum(salt->salt[0]) || salt->salt[0] == '.' || salt->salt[0] == '/'))
176 salt->salt[0] = crypt64[salt->salt[0] % (sizeof (crypt64) - 1)];
177 if (!(isalnum(salt->salt[1]) || salt->salt[1] == '.' || salt->salt[1] == '/'))
178 salt->salt[1] = crypt64[salt->salt[1] % (sizeof (crypt64) - 1)];
180 crypted_pw = crypt (pw_in, (char *)salt->salt);
184 make_salt (&lsalt, 2);
185 lsalt.salt[0] = crypt64[lsalt.salt[0] % (sizeof (crypt64) - 1)];
186 lsalt.salt[1] = crypt64[lsalt.salt[1] % (sizeof (crypt64) - 1)];
187 crypted_pw = crypt (pw_in, (char *)lsalt.salt);
190 return (STRDUP (crypted_pw));
194 hash_md5 (const char *pw_in, Salt * salt)
196 lutil_MD5_CTX MD5context;
197 unsigned char MD5digest[16];
198 unsigned char *hashing_pw = (unsigned char *)pw_in;
199 char *base64digest = NULL;
200 int tot_len = strlen (pw_in);
201 int salted = (salt && salt->salt && salt->len);
203 /* append salt to password */
206 hashing_pw = (unsigned char *)malloc (tot_len + salt->len);
207 memcpy (hashing_pw, pw_in, tot_len);
208 memcpy (&hashing_pw[tot_len], salt->salt, salt->len);
209 tot_len += salt->len;
212 lutil_MD5Init (&MD5context);
213 lutil_MD5Update (&MD5context, hashing_pw, tot_len);
214 lutil_MD5Final (MD5digest, &MD5context);
216 base64digest = pw_encode (MD5digest, salt, sizeof (MD5digest));
221 return (base64digest);
225 hash_sha1 (const char *pw_in, Salt * salt)
227 lutil_SHA1_CTX SHA1context;
228 unsigned char SHA1digest[20];
229 unsigned char *hashing_pw = (unsigned char *)pw_in;
230 char *base64digest = NULL;
231 int tot_len = strlen (pw_in);
232 int salted = (salt && salt->salt);
234 /* append salt to password */
237 hashing_pw = (unsigned char *)malloc (tot_len + salt->len);
238 memcpy (hashing_pw, pw_in, tot_len);
239 memcpy (&hashing_pw[tot_len], salt->salt, salt->len);
240 tot_len += salt->len;
243 lutil_SHA1Init (&SHA1context);
244 lutil_SHA1Update (&SHA1context, hashing_pw, tot_len);
245 lutil_SHA1Final (SHA1digest, &SHA1context);
247 base64digest = pw_encode (SHA1digest, salt, sizeof (SHA1digest));
252 return (base64digest);
255 static Hash hashes[] =
257 {"none", 4, hash_none, 0, HASHTYPE_NONE, HASHTYPE_NONE, 0},
258 {"crypt", 5, hash_crypt, 1, HASHTYPE_CRYPT, HASHTYPE_CRYPT, 2},
259 {"md5", 3, hash_md5, 0, HASHTYPE_MD5, HASHTYPE_SMD5, 0},
260 {"smd5", 4, hash_md5, 1, HASHTYPE_SMD5, HASHTYPE_SMD5, 4},
261 {"sha", 3, hash_sha1, 0, HASHTYPE_SHA1, HASHTYPE_SSHA1, 0},
262 {"ssha", 4, hash_sha1, 1, HASHTYPE_SSHA1, HASHTYPE_SSHA1, 4},
263 {NULL, 0, NULL, 0, HASHTYPE_NONE, HASHTYPE_NONE, 0}
267 modify_dn (LDAP * ld, char *targetdn, char *pwattr, char *oldpw,
268 char *newpw, HashTypes htype, Salt * salt)
271 int salted = salt->salt ? 1 : 0;
272 int want_salt = salt->len && !salted;
274 char *hashed_pw = NULL;
275 char *strvals[2] = {NULL, NULL};
277 LDAPMod *mods[2] = {&mod, NULL};
279 if (!ld || !targetdn || !newpw)
282 /* auto-generate password */
284 newpw = gen_pass (auto_gen_pw);
289 make_salt (salt, salt->len);
290 htype = hashes[htype].type_salted;
292 else if (hashes[htype].default_salt_len)
294 /* user chose a salted hash and needs a salt */
298 salt->len = hashes[htype].default_salt_len;
299 make_salt (salt, salt->len);
304 hashed_pw = hashes[htype].func (newpw, salt->len ? salt : NULL);
306 /* return salt back to it's original state */
313 buf = (char *)malloc (hashes[htype].namesz + 3 + strlen (hashed_pw));
315 sprintf (buf, "{%s}%s", hashes[htype].name, hashed_pw);
317 sprintf (buf, "%s", hashed_pw);
321 printf ("%s", targetdn);
326 printf (":%s", newpw);
332 mod.mod_vals.modv_strvals = strvals;
333 mod.mod_type = pwattr;
334 mod.mod_op = LDAP_MOD_REPLACE;
336 if (!noupdates && (ret = ldap_modify_s (ld, targetdn, mods)) != LDAP_SUCCESS)
337 ldap_perror (ld, "ldap_modify_s");
347 fprintf (stderr, "Usage: %s [options] [filter]\n", s);
348 fprintf (stderr, " -a attrib\tpassword attribute (default: %s)\n", LDAP_PASSWD_ATTRIB);
349 fprintf (stderr, " -b basedn\tbasedn to perform searches\n");
350 /* fprintf (stderr, " -C\t\tuse entry's current hash mechanism\n"); */
351 fprintf (stderr, " -D binddn\tbind dn\n");
352 fprintf (stderr, " -d level\tdebugging level\n");
353 fprintf (stderr, " -E\t\tprompt for new password\n");
354 fprintf (stderr, " -e passwd\tnew password\n");
355 fprintf (stderr, " -g passlen\tauto-generate passwords with length pwlen\n");
356 fprintf (stderr, " -H hash\thash type (default: crypt)\n");
357 fprintf (stderr, " -h host\tldap server (default: localhost)\n");
359 fprintf (stderr, " -K\t\tuse Kerberos step 1\n");
360 fprintf (stderr, " -k\t\tuse Kerberos\n");
362 fprintf (stderr, " -l time\ttime limit\n");
363 fprintf (stderr, " -n\t\tmake no modifications\n");
364 fprintf (stderr, " -p port\tldap port\n");
365 fprintf (stderr, " -s scope\tsearch scope: base, one, sub (default: sub)\n");
366 fprintf (stderr, " -t targetdn\tdn to change password\n");
367 fprintf (stderr, " -v\t\tverbose (more v's, more verbose)\n");
368 fprintf (stderr, " -W\t\tprompt for bind password\n");
369 fprintf (stderr, " -w passwd\tbind password (for simple authentication)\n");
370 fprintf (stderr, " -Y saltlen\tsalt length to use\n");
371 /* fprintf (stderr, " -y salt\tsalt to use\n"); */
372 fprintf (stderr, " -z size\tsize limit\n");
377 main (int argc, char *argv[])
382 char *filtpattern = NULL;
383 char *ldaphost = NULL;
384 char *targetdn = NULL;
385 char *pwattr = LDAP_PASSWD_ATTRIB;
387 int authmethod = LDAP_AUTH_SIMPLE;
388 int hashtype = HASHTYPE_CRYPT;
392 int scope = LDAP_SCOPE_SUBTREE;
393 int sizelimit = LDAP_NO_LIMIT;
394 int timelimit = LDAP_NO_LIMIT;
406 while ((i = getopt (argc, argv, "a:b:C:D:d:Ee:g:H:h:Kkl:np:s:t:vWw:Y:y:z:")) != EOF)
410 case 'a': /* password attribute */
411 pwattr = STRDUP (optarg);
414 case 'b': /* base search dn */
415 base = STRDUP (optarg);
422 case 'D': /* bind distinguished name */
423 binddn = STRDUP (optarg);
426 case 'd': /* debugging option */
427 debug |= atoi (optarg);
430 case 'E': /* prompt for new password */
434 case 'e': /* new password */
435 newpw = STRDUP (optarg);
439 auto_gen_pw = strtol (optarg, NULL, 10);
442 case 'H': /* hashes */
443 for (j = 0; hashes[j].name; j++)
445 if (!strncasecmp (optarg, hashes[j].name, hashes[j].namesz))
447 hashtype = hashes[j].type;
454 fprintf (stderr, "hash type: %s is unknown\n", optarg);
459 case 'h': /* ldap host */
460 ldaphost = STRDUP (optarg);
463 case 'K': /* use kerberos bind, 1st part only */
465 authmethod = LDAP_AUTH_KRBV41;
467 fprintf (stderr, "%s was not compiled with Kerberos support\n", argv[0]);
471 case 'k': /* use kerberos bind */
473 authmethod = LDAP_AUTH_KRBV4;
475 fprintf (stderr, "%s was not compiled with Kerberos support\n", argv[0]);
479 case 'l': /* time limit */
480 timelimit = strtol (optarg, NULL, 10);
483 case 'n': /* don't update entry(s) */
487 case 'p': /* ldap port */
488 ldapport = strtol (optarg, NULL, 10);
491 case 's': /* scope */
492 if (strncasecmp (optarg, "base", 4) == 0)
493 scope = LDAP_SCOPE_BASE;
494 else if (strncasecmp (optarg, "one", 3) == 0)
495 scope = LDAP_SCOPE_ONELEVEL;
496 else if (strncasecmp (optarg, "sub", 3) == 0)
497 scope = LDAP_SCOPE_SUBTREE;
500 fprintf (stderr, "scope should be base, one, or sub\n");
505 case 't': /* target dn */
506 targetdn = STRDUP (optarg);
509 case 'v': /* verbose */
513 case 'W': /* promt for bind password */
517 case 'w': /* bind password */
518 bindpw = STRDUP (optarg);
521 case 'Y': /* salt length */
522 salt.len = strtol (optarg, NULL, 10);
525 case 'y': /* user specified salt */
526 salt.len = strlen (optarg);
527 salt.salt = (unsigned char *)STRDUP (optarg);
530 case 'z': /* time limit */
531 sizelimit = strtol (optarg, NULL, 10);
540 if (!(argc - optind < 1))
541 filtpattern = STRDUP (argv[optind]);
543 /* check for target(s) */
544 if (!filtpattern && !targetdn)
547 /* handle bind password */
549 bindpw = strdup (getpass ("Enter LDAP password: "));
551 /* handle new password */
555 newpw = strdup (getpass ("New password: "));
556 cknewpw = getpass ("Re-enter new password: ");
558 if (strncmp (newpw, cknewpw, strlen (newpw)))
560 fprintf (stderr, "passwords do not match\n");
566 lber_set_option( NULL, LBER_OPT_DEBUG_LEVEL, &debug );
567 ldap_set_option( NULL, LDAP_OPT_DEBUG_LEVEL, &debug );
570 /* connect to server */
571 if ((ld = ldap_open (ldaphost, ldapport)) == NULL)
578 ldap_set_option (ld, LDAP_OPT_TIMELIMIT, (void *)&timelimit);
579 ldap_set_option (ld, LDAP_OPT_SIZELIMIT, (void *)&sizelimit);
581 /* this seems prudent */
583 int deref = LDAP_DEREF_NEVER;
584 ldap_set_option( ld, LDAP_OPT_DEREF, &deref);
588 /* authenticate to server */
589 if (ldap_bind_s (ld, binddn, bindpw, authmethod) != LDAP_SUCCESS)
591 ldap_perror (ld, "ldap_bind");
599 /* insert code here =) */
602 modify_dn (ld, targetdn, pwattr, NULL, newpw, hashtype, &salt);
608 LDAPMessage *result = NULL, *e = NULL;
609 char *attrs[3] = {"dn", NULL, NULL};
613 sprintf (filter, "%s", filtpattern);
614 i = ldap_search_s (ld, base, scope, filter, attrs, 0, &result);
615 if (i != LDAP_SUCCESS &&
616 i != LDAP_TIMELIMIT_EXCEEDED &&
617 i != LDAP_SIZELIMIT_EXCEEDED)
619 ldap_perror (ld, "ldap_search_s");
623 for (e = ldap_first_entry (ld, result); e; e = ldap_next_entry (ld, e))
625 char *dn = ldap_get_dn (ld, e);
628 struct berval **pw_vals = ldap_get_values_len (ld, e, pwattr);
629 modify_dn (ld, dn, pwattr, pw_vals ? pw_vals[0]->bv_val : NULL, newpw, hashtype, &salt);
631 ldap_value_free_len (pw_vals);
637 /* disconnect from server */