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>
22 #include <ac/signal.h>
23 #include <ac/socket.h>
24 #include <ac/string.h>
26 #include <ac/unistd.h>
31 #include <lutil_md5.h>
32 #include <lutil_sha1.h>
34 #include "ldapconfig.h"
37 #define CEILING(x) ((double)(x) > (int)(x) ? (int)(x) + 1 : (int)(x))
39 #define LDAP_PASSWD_ATTRIB "userPassword"
40 #define LDAP_PASSWD_CONF DEFAULT_SYSCONFDIR DIRSEP "passwd.conf"
68 char *(*func) (const char *, Salt *);
69 unsigned char takes_salt;
71 HashTypes type_salted;
72 unsigned int default_salt_len;
76 static int noupdates = 0;
77 static int verbose = 0;
78 static int want_entryhash = 0;
79 static int auto_gen_pw = 0;
84 * pw_encode() essentially base64 encodes a password and its salt
88 pw_encode (unsigned char *passwd, Salt * salt, unsigned int len)
90 int salted = salt && salt->salt && salt->len;
92 char *base64digest = NULL;
93 unsigned char *npasswd = passwd;
97 npasswd = (unsigned char *)malloc (len + salt->len);
98 memcpy (npasswd, passwd, len);
99 memcpy (&npasswd[len], salt->salt, salt->len);
103 b64_len = CEILING (len / 3) * 4 + 1;
104 base64digest = (char *)malloc (b64_len);
105 if (lutil_b64_ntop (npasswd, len, base64digest, b64_len) < 0)
114 return (base64digest);
118 * if you'd like to write a better salt generator, please, be my guest.
122 make_salt (Salt * salt, unsigned int len)
129 salt->salt = (unsigned char *)malloc (len);
131 for (len = 0; len < salt->len; len++)
132 salt->salt[len] = rand () & 0xff;
140 gen_pass (unsigned int len)
142 static const unsigned char autogen[] =
143 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890.,";
150 make_salt (&salt, len);
151 for (i = 0; i < len; i++)
152 salt.salt[i] = autogen[salt.salt[i] % (sizeof (autogen) - 1)];
154 return ((char *)salt.salt);
157 #ifdef SLAPD_CLEARTEXT
159 hash_none (const char *pw_in, Salt * salt)
161 return (strdup (pw_in));
167 hash_crypt (const char *pw_in, Salt * salt)
169 static const unsigned char crypt64[] =
170 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./";
171 char *crypted_pw = NULL;
174 if (salt && salt->salt && strlen ((char *)salt->salt) >= 2)
177 if (!(isalnum(salt->salt[0]) || salt->salt[0] == '.' || salt->salt[0] == '/'))
178 salt->salt[0] = crypt64[salt->salt[0] % (sizeof (crypt64) - 1)];
179 if (!(isalnum(salt->salt[1]) || salt->salt[1] == '.' || salt->salt[1] == '/'))
180 salt->salt[1] = crypt64[salt->salt[1] % (sizeof (crypt64) - 1)];
182 crypted_pw = crypt (pw_in, (char *)salt->salt);
186 make_salt (&lsalt, 2);
187 lsalt.salt[0] = crypt64[lsalt.salt[0] % (sizeof (crypt64) - 1)];
188 lsalt.salt[1] = crypt64[lsalt.salt[1] % (sizeof (crypt64) - 1)];
189 crypted_pw = crypt (pw_in, (char *)lsalt.salt);
192 return (strdup (crypted_pw));
197 hash_md5 (const char *pw_in, Salt * salt)
199 lutil_MD5_CTX MD5context;
200 unsigned char MD5digest[16];
202 lutil_MD5Init (&MD5context);
203 lutil_MD5Update (&MD5context,
204 (const unsigned char *)pw_in, strlen(pw_in));
205 if (salt && salt->salt && salt->len)
206 lutil_MD5Update (&MD5context, salt->salt, salt->len);
207 lutil_MD5Final (MD5digest, &MD5context);
209 return (pw_encode (MD5digest, salt, sizeof (MD5digest)));
213 hash_sha1 (const char *pw_in, Salt * salt)
215 lutil_SHA1_CTX SHA1context;
216 unsigned char SHA1digest[20];
218 lutil_SHA1Init (&SHA1context);
219 lutil_SHA1Update (&SHA1context,
220 (const unsigned char *)pw_in, strlen(pw_in));
221 if (salt && salt->salt && salt->len)
222 lutil_SHA1Update (&SHA1context, salt->salt, salt->len);
223 lutil_SHA1Final (SHA1digest, &SHA1context);
225 return (pw_encode (SHA1digest, salt, sizeof (SHA1digest)));
228 static Hash hashes[] =
230 #ifdef SLAPD_CLEARTEXT
231 {"none", 4, hash_none, 0, HASHTYPE_NONE, HASHTYPE_NONE, 0},
234 {"crypt", 5, hash_crypt, 1, HASHTYPE_CRYPT, HASHTYPE_CRYPT, 2},
236 {"md5", 3, hash_md5, 0, HASHTYPE_MD5, HASHTYPE_SMD5, 0},
237 {"smd5", 4, hash_md5, 1, HASHTYPE_SMD5, HASHTYPE_SMD5, 4},
238 {"sha", 3, hash_sha1, 0, HASHTYPE_SHA1, HASHTYPE_SSHA1, 0},
239 {"ssha", 4, hash_sha1, 1, HASHTYPE_SSHA1, HASHTYPE_SSHA1, 4},
240 {NULL, 0, NULL, 0, HASHTYPE_NONE, HASHTYPE_NONE, 0}
244 modify_dn (LDAP * ld, char *targetdn, char *pwattr, char *oldpw,
245 char *newpw, HashTypes htype, Salt * salt)
248 int salted = salt->salt ? 1 : 0;
249 int want_salt = salt->len && !salted;
251 char *hashed_pw = NULL;
253 LDAPMod mod, *mods[2];
255 if (!ld || !targetdn || !newpw)
258 /* auto-generate password */
260 newpw = gen_pass (auto_gen_pw);
265 make_salt (salt, salt->len);
266 htype = hashes[htype].type_salted;
268 else if (hashes[htype].default_salt_len)
270 /* user chose a salted hash and needs a salt */
274 salt->len = hashes[htype].default_salt_len;
275 make_salt (salt, salt->len);
280 hashed_pw = hashes[htype].func (newpw, salt->len ? salt : NULL);
282 /* return salt back to its original state */
289 buf = (char *)malloc (hashes[htype].namesz + 3 + strlen (hashed_pw));
291 sprintf (buf, "{%s}%s", hashes[htype].name, hashed_pw);
293 sprintf (buf, "%s", hashed_pw);
297 printf ("%s", targetdn);
302 printf (":%s", newpw);
309 mod.mod_vals.modv_strvals = strvals;
310 mod.mod_type = pwattr;
311 mod.mod_op = LDAP_MOD_REPLACE;
315 if (!noupdates && (ret = ldap_modify_s (ld, targetdn, mods)) != LDAP_SUCCESS)
316 ldap_perror (ld, "ldap_modify");
326 fprintf (stderr, "Usage: %s [options] [filter]\n", s);
327 fprintf (stderr, " -a attrib\tpassword attribute (default: %s)\n", LDAP_PASSWD_ATTRIB);
328 fprintf (stderr, " -b basedn\tbasedn to perform searches\n");
329 /* fprintf (stderr, " -C\t\tuse entry's current hash mechanism\n"); */
330 fprintf (stderr, " -D binddn\tbind dn\n");
331 fprintf (stderr, " -d level\tdebugging level\n");
332 fprintf (stderr, " -E\t\tprompt for new password\n");
333 fprintf (stderr, " -e passwd\tnew password\n");
334 fprintf (stderr, " -g passlen\tauto-generate passwords with length pwlen\n");
335 fprintf (stderr, " -H hash\thash type (default: crypt)\n");
336 fprintf (stderr, " -h host\tldap server (default: localhost)\n");
338 fprintf (stderr, " -K\t\tuse Kerberos step 1\n");
339 fprintf (stderr, " -k\t\tuse Kerberos\n");
341 fprintf (stderr, " -l time\ttime limit\n");
342 fprintf (stderr, " -n\t\tmake no modifications\n");
343 fprintf (stderr, " -P version\tprotocol version (2 or 3)\n");
344 fprintf (stderr, " -p port\tldap port\n");
345 fprintf (stderr, " -s scope\tsearch scope: base, one, sub (default: sub)\n");
346 fprintf (stderr, " -t targetdn\tdn to change password\n");
347 fprintf (stderr, " -v\t\tverbose (more v's, more verbose)\n");
348 fprintf (stderr, " -W\t\tprompt for bind password\n");
349 fprintf (stderr, " -w passwd\tbind password (for simple authentication)\n");
350 fprintf (stderr, " -Y saltlen\tsalt length to use\n");
351 /* fprintf (stderr, " -y salt\tsalt to use\n"); */
352 fprintf (stderr, " -z size\tsize limit\n");
357 main (int argc, char *argv[])
362 char *filtpattern = NULL;
363 char *ldaphost = NULL;
364 char *targetdn = NULL;
365 char *pwattr = LDAP_PASSWD_ATTRIB;
367 int authmethod = LDAP_AUTH_SIMPLE;
368 int hashtype = HASHTYPE_CRYPT;
372 int scope = LDAP_SCOPE_SUBTREE;
387 while ((i = getopt (argc, argv, "a:b:C:D:d:Ee:g:H:h:Kkl:nP:p:s:t:vWw:Y:y:z:")) != EOF)
391 case 'a': /* password attribute */
392 pwattr = strdup (optarg);
395 case 'b': /* base search dn */
396 base = strdup (optarg);
403 case 'D': /* bind distinguished name */
404 binddn = strdup (optarg);
407 case 'd': /* debugging option */
408 debug |= atoi (optarg);
411 case 'E': /* prompt for new password */
415 case 'e': /* new password */
416 newpw = strdup (optarg);
420 auto_gen_pw = strtol (optarg, NULL, 10);
423 case 'H': /* hashes */
424 for (j = 0; hashes[j].name; j++)
426 if (!strncasecmp (optarg, hashes[j].name, hashes[j].namesz))
428 hashtype = hashes[j].type;
435 fprintf (stderr, "hash type: %s is unknown\n", optarg);
440 case 'h': /* ldap host */
441 ldaphost = strdup (optarg);
444 case 'K': /* use kerberos bind, 1st part only */
446 authmethod = LDAP_AUTH_KRBV41;
448 fprintf (stderr, "%s was not compiled with Kerberos support\n", argv[0]);
453 case 'k': /* use kerberos bind */
455 authmethod = LDAP_AUTH_KRBV4;
457 fprintf (stderr, "%s was not compiled with Kerberos support\n", argv[0]);
462 case 'l': /* time limit */
463 timelimit = strtol (optarg, NULL, 10);
466 case 'n': /* don't update entry(s) */
471 switch( atoi( optarg ) ) {
473 version = LDAP_VERSION2;
476 version = LDAP_VERSION3;
479 fprintf( stderr, "protocol version should be 2 or 3\n" );
484 case 'p': /* ldap port */
485 ldapport = strtol (optarg, NULL, 10);
488 case 's': /* scope */
489 if (strcasecmp (optarg, "base") == 0)
490 scope = LDAP_SCOPE_BASE;
491 else if (strcasecmp (optarg, "one") == 0)
492 scope = LDAP_SCOPE_ONELEVEL;
493 else if (strcasecmp (optarg, "sub") == 0)
494 scope = LDAP_SCOPE_SUBTREE;
497 fprintf (stderr, "scope should be base, one, or sub\n");
502 case 't': /* target dn */
503 targetdn = strdup (optarg);
506 case 'v': /* verbose */
510 case 'W': /* promt for bind password */
514 case 'w': /* bind password */
515 bindpw = strdup (optarg);
518 case 'Y': /* salt length */
519 salt.len = strtol (optarg, NULL, 10);
522 case 'y': /* user specified salt */
523 salt.len = strlen (optarg);
524 salt.salt = (unsigned char *)strdup (optarg);
527 case 'z': /* time limit */
528 sizelimit = strtol (optarg, NULL, 10);
537 if (!(argc - optind < 1))
538 filtpattern = strdup (argv[optind]);
540 /* check for target(s) */
541 if (!filtpattern && !targetdn)
544 /* handle bind password */
546 bindpw = strdup (getpass ("Enter LDAP password: "));
548 /* handle new password */
552 newpw = strdup (getpass ("New password: "));
553 cknewpw = getpass ("Re-enter new password: ");
555 if (strncmp (newpw, cknewpw, strlen (newpw)))
557 fprintf (stderr, "passwords do not match\n");
558 return ( EXIT_FAILURE );
563 if( ber_set_option( NULL, LBER_OPT_DEBUG_LEVEL, &debug ) != LBER_OPT_ERROR ) {
564 fprintf( stderr, "Could not set LBER_OPT_DEBUG_LEVEL %d\n", debug );
566 if( ldap_set_option( NULL, LDAP_OPT_DEBUG_LEVEL, &debug ) != LDAP_OPT_ERROR ) {
567 fprintf( stderr, "Could not set LDAP_OPT_DEBUG_LEVEL %d\n", debug );
572 (void) SIGNAL( SIGPIPE, SIG_IGN );
574 /* seed random number generator */
576 #ifdef HAVE_GETTIMEOFDAY
577 /* this is of questionable value
578 * gettimeofday not provide much usec
582 gettimeofday (&tv, NULL);
586 /* The traditional seed */
587 srand((unsigned)time( NULL ));
590 /* connect to server */
591 if ((ld = ldap_init (ldaphost, ldapport)) == NULL)
593 perror ("ldap_init");
594 return ( EXIT_FAILURE );
598 if (timelimit != -1 &&
599 ldap_set_option( ld, LDAP_OPT_TIMELIMIT, (void *) &timelimit ) == LDAP_OPT_ERROR )
601 fprintf( stderr, "Could not set LDAP_OPT_TIMELIMIT %d\n", timelimit );
603 if (sizelimit != -1 &&
604 ldap_set_option( ld, LDAP_OPT_SIZELIMIT, (void *) &sizelimit ) == LDAP_OPT_ERROR )
606 fprintf( stderr, "Could not set LDAP_OPT_SIZELIMIT %d\n", sizelimit );
609 /* this seems prudent */
611 int deref = LDAP_DEREF_NEVER;
612 ldap_set_option( ld, LDAP_OPT_DEREF, &deref);
616 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, &version ) == LDAP_OPT_ERROR)
618 fprintf( stderr, "Could not set LDAP_OPT_PROTOCOL_VERSION %d\n", version );
621 /* authenticate to server */
622 if (ldap_bind_s (ld, binddn, bindpw, authmethod) != LDAP_SUCCESS)
624 ldap_perror (ld, "ldap_bind");
625 return ( EXIT_FAILURE );
632 /* insert code here =) */
635 modify_dn (ld, targetdn, pwattr, NULL, newpw, hashtype, &salt);
641 LDAPMessage *result = NULL, *e;
648 sprintf (filter, "%s", filtpattern);
649 i = ldap_search_s (ld, base, scope, filter, attrs, 0, &result);
650 if (i != LDAP_SUCCESS &&
651 i != LDAP_TIMELIMIT_EXCEEDED &&
652 i != LDAP_SIZELIMIT_EXCEEDED)
654 ldap_perror (ld, "ldap_search");
655 return ( EXIT_FAILURE );
658 for (e = ldap_first_entry (ld, result); e; e = ldap_next_entry (ld, e))
660 char *dn = ldap_get_dn (ld, e);
663 struct berval **pw_vals = ldap_get_values_len (ld, e, pwattr);
664 modify_dn (ld, dn, pwattr, pw_vals ? pw_vals[0]->bv_val : NULL, newpw, hashtype, &salt);
666 ldap_value_free_len (pw_vals);
672 /* disconnect from server */
675 return ( EXIT_SUCCESS );