3 * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
4 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
7 * Copyright 1998, David E. Storey, All rights reserved.
8 * This software is not subject to any license of The Murphy Group, Inc.
9 * or George Mason University.
11 * Redistribution and use in source and binary forms are permitted only
12 * as authorized by the OpenLDAP Public License. A copy of this
13 * license is available at http://www.OpenLDAP.org/license.html or
14 * in file LICENSE in the top-level directory of the distribution.
16 * ldappasswd.c - program to modify passwords in an LDAP tree
18 * Author: David E. Storey <dave@tamos.net>
25 #include <ac/stdlib.h>
28 #include <ac/signal.h>
29 #include <ac/socket.h>
30 #include <ac/string.h>
32 #include <ac/unistd.h>
38 #include <lutil_md5.h>
39 #include <lutil_sha1.h>
41 #include "ldap_defaults.h"
44 #define LDAP_PASSWD_ATTRIB "userPassword"
45 #define LDAP_PASSWD_CONF LDAP_SYSCONFDIR LDAP_DIRSEP "passwd.conf"
73 char *(*func) (const char *, Salt *);
74 unsigned char takes_salt;
76 HashTypes type_salted;
77 unsigned int default_salt_len;
81 static int noupdates = 0;
82 static int verbose = 0;
83 static int want_entryhash = 0;
84 static int auto_gen_pw = 0;
89 * pw_encode() essentially base64 encodes a password and its salt
93 pw_encode (unsigned char *passwd, Salt * salt, unsigned int len)
95 int salted = salt && salt->salt && salt->len;
97 char *base64digest = NULL;
98 unsigned char *npasswd = passwd;
102 npasswd = (unsigned char *)malloc (len + salt->len);
103 memcpy (npasswd, passwd, len);
104 memcpy (&npasswd[len], salt->salt, salt->len);
108 b64_len = LUTIL_BASE64_ENCODE_LEN(len) + 1;
110 base64digest = (char *)malloc (b64_len);
112 if (lutil_b64_ntop (npasswd, len, base64digest, b64_len) < 0)
121 return (base64digest);
125 * if you'd like to write a better salt generator, please, be my guest.
129 make_salt (Salt * salt, unsigned int len)
136 salt->salt = (unsigned char *)malloc (len);
138 for (len = 0; len < salt->len; len++)
139 salt->salt[len] = rand () & 0xff;
147 gen_pass (unsigned int len)
149 static const unsigned char autogen[] =
150 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890.,";
157 make_salt (&salt, len);
158 for (i = 0; i < len; i++)
159 salt.salt[i] = autogen[salt.salt[i] % (sizeof (autogen) - 1)];
161 return ((char *)salt.salt);
164 #ifdef SLAPD_CLEARTEXT
166 hash_none (const char *pw_in, Salt * salt)
168 return (strdup (pw_in));
174 hash_crypt (const char *pw_in, Salt * salt)
176 static const unsigned char crypt64[] =
177 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./";
178 char *crypted_pw = NULL;
181 if (salt && salt->salt && strlen ((char *)salt->salt) >= 2)
184 if (!(isalnum(salt->salt[0]) || salt->salt[0] == '.' || salt->salt[0] == '/'))
185 salt->salt[0] = crypt64[salt->salt[0] % (sizeof (crypt64) - 1)];
186 if (!(isalnum(salt->salt[1]) || salt->salt[1] == '.' || salt->salt[1] == '/'))
187 salt->salt[1] = crypt64[salt->salt[1] % (sizeof (crypt64) - 1)];
189 crypted_pw = crypt (pw_in, (char *)salt->salt);
193 make_salt (&lsalt, 2);
194 lsalt.salt[0] = crypt64[lsalt.salt[0] % (sizeof (crypt64) - 1)];
195 lsalt.salt[1] = crypt64[lsalt.salt[1] % (sizeof (crypt64) - 1)];
196 crypted_pw = crypt (pw_in, (char *)lsalt.salt);
199 return (strdup (crypted_pw));
204 hash_md5 (const char *pw_in, Salt * salt)
206 lutil_MD5_CTX MD5context;
207 unsigned char MD5digest[16];
209 lutil_MD5Init (&MD5context);
210 lutil_MD5Update (&MD5context,
211 (const unsigned char *)pw_in, strlen(pw_in));
212 if (salt && salt->salt && salt->len)
213 lutil_MD5Update (&MD5context, salt->salt, salt->len);
214 lutil_MD5Final (MD5digest, &MD5context);
216 return (pw_encode (MD5digest, salt, sizeof (MD5digest)));
220 hash_sha1 (const char *pw_in, Salt * salt)
222 lutil_SHA1_CTX SHA1context;
223 unsigned char SHA1digest[20];
225 lutil_SHA1Init (&SHA1context);
226 lutil_SHA1Update (&SHA1context,
227 (const unsigned char *)pw_in, strlen(pw_in));
228 if (salt && salt->salt && salt->len)
229 lutil_SHA1Update (&SHA1context, salt->salt, salt->len);
230 lutil_SHA1Final (SHA1digest, &SHA1context);
232 return (pw_encode (SHA1digest, salt, sizeof (SHA1digest)));
235 static const Hash hashes[] =
237 #ifdef SLAPD_CLEARTEXT
238 {"none", 4, hash_none, 0, HASHTYPE_NONE, HASHTYPE_NONE, 0},
241 {"crypt", 5, hash_crypt, 1, HASHTYPE_CRYPT, HASHTYPE_CRYPT, 2},
243 {"md5", 3, hash_md5, 0, HASHTYPE_MD5, HASHTYPE_SMD5, 0},
244 {"smd5", 4, hash_md5, 1, HASHTYPE_SMD5, HASHTYPE_SMD5, 4},
245 {"sha", 3, hash_sha1, 0, HASHTYPE_SHA1, HASHTYPE_SSHA1, 0},
246 {"ssha", 4, hash_sha1, 1, HASHTYPE_SSHA1, HASHTYPE_SSHA1, 4},
247 {NULL, 0, NULL, 0, HASHTYPE_NONE, HASHTYPE_NONE, 0}
251 modify_dn (LDAP * ld, char *targetdn, char *pwattr, char *oldpw,
252 char *newpw, HashTypes htype, Salt * salt)
255 int salted = salt->salt ? 1 : 0;
256 int want_salt = salt->len && !salted;
258 char *hashed_pw = NULL;
260 LDAPMod mod, *mods[2];
262 if (!ld || !targetdn || !newpw)
265 /* auto-generate password */
267 newpw = gen_pass (auto_gen_pw);
272 make_salt (salt, salt->len);
273 htype = hashes[htype].type_salted;
275 else if (hashes[htype].default_salt_len)
277 /* user chose a salted hash and needs a salt */
281 salt->len = hashes[htype].default_salt_len;
282 make_salt (salt, salt->len);
287 hashed_pw = hashes[htype].func (newpw, salt->len ? salt : NULL);
289 /* return salt back to its original state */
296 buf = (char *)malloc (hashes[htype].namesz + 3 + strlen (hashed_pw));
298 sprintf (buf, "{%s}%s", hashes[htype].name, hashed_pw);
300 sprintf (buf, "%s", hashed_pw);
304 printf ("%s", targetdn);
309 printf (":%s", newpw);
316 mod.mod_values = strvals;
317 mod.mod_type = pwattr;
318 mod.mod_op = LDAP_MOD_REPLACE;
322 if (!noupdates && (ret = ldap_modify_s (ld, targetdn, mods)) != LDAP_SUCCESS)
323 ldap_perror (ld, "ldap_modify");
333 fprintf (stderr, "Usage: %s [options] [filter]\n", s);
334 fprintf (stderr, " -a attrib\tpassword attribute (default: " LDAP_PASSWD_ATTRIB ")\n");
335 fprintf (stderr, " -b basedn\tbasedn to perform searches\n");
336 /* fprintf (stderr, " -C\t\tuse entry's current hash mechanism\n"); */
337 fprintf (stderr, " -D binddn\tbind dn\n");
338 fprintf (stderr, " -d level\tdebugging level\n");
339 fprintf (stderr, " -E\t\tprompt for new password\n");
340 fprintf (stderr, " -e passwd\tnew password\n");
341 fprintf (stderr, " -g passlen\tauto-generate passwords with length pwlen\n");
342 fprintf (stderr, " -H hash\thash type (default: crypt)\n");
343 fprintf (stderr, " -h host\tldap server (default: localhost)\n");
345 fprintf (stderr, " -K\t\tuse Kerberos step 1\n");
346 fprintf (stderr, " -k\t\tuse Kerberos\n");
348 fprintf (stderr, " -l time\ttime limit\n");
349 fprintf (stderr, " -n\t\tmake no modifications\n");
350 fprintf (stderr, " -P version\tprotocol version (2 or 3)\n");
351 fprintf (stderr, " -p port\tldap port\n");
352 fprintf (stderr, " -s scope\tsearch scope: base, one, sub (default: sub)\n");
353 fprintf (stderr, " -t targetdn\tdn to change password\n");
354 fprintf (stderr, " -v\t\tverbose (more v's, more verbose)\n");
355 fprintf (stderr, " -W\t\tprompt for bind password\n");
356 fprintf (stderr, " -w passwd\tbind password (for simple authentication)\n");
357 fprintf (stderr, " -Y saltlen\tsalt length to use\n");
358 /* fprintf (stderr, " -y salt\tsalt to use\n"); */
359 fprintf (stderr, " -z size\tsize limit\n");
360 exit( EXIT_FAILURE );
364 main (int argc, char *argv[])
369 char *filtpattern = NULL;
370 char *ldaphost = NULL;
371 char *targetdn = NULL;
372 char *pwattr = LDAP_PASSWD_ATTRIB;
374 int authmethod = LDAP_AUTH_SIMPLE;
375 int hashtype = HASHTYPE_CRYPT;
379 int scope = LDAP_SCOPE_SUBTREE;
394 while ((i = getopt (argc, argv, "a:b:C:D:d:Ee:g:H:h:Kkl:nP:p:s:t:vWw:Y:y:z:")) != EOF)
398 case 'a': /* password attribute */
399 pwattr = strdup (optarg);
402 case 'b': /* base search dn */
403 base = strdup (optarg);
410 case 'D': /* bind distinguished name */
411 binddn = strdup (optarg);
414 case 'd': /* debugging option */
415 debug |= atoi (optarg);
418 case 'E': /* prompt for new password */
422 case 'e': /* new password */
423 newpw = strdup (optarg);
427 auto_gen_pw = strtol (optarg, NULL, 10);
430 case 'H': /* hashes */
431 for (j = 0; hashes[j].name; j++)
433 if (!strncasecmp (optarg, hashes[j].name, hashes[j].namesz))
435 hashtype = hashes[j].type;
442 fprintf (stderr, "hash type: %s is unknown\n", optarg);
447 case 'h': /* ldap host */
448 ldaphost = strdup (optarg);
451 case 'K': /* use kerberos bind, 1st part only */
453 authmethod = LDAP_AUTH_KRBV41;
455 fprintf (stderr, "%s was not compiled with Kerberos support\n", argv[0]);
460 case 'k': /* use kerberos bind */
462 authmethod = LDAP_AUTH_KRBV4;
464 fprintf (stderr, "%s was not compiled with Kerberos support\n", argv[0]);
469 case 'l': /* time limit */
470 timelimit = strtol (optarg, NULL, 10);
473 case 'n': /* don't update entry(s) */
478 switch( atoi( optarg ) ) {
480 version = LDAP_VERSION2;
483 version = LDAP_VERSION3;
486 fprintf( stderr, "protocol version should be 2 or 3\n" );
491 case 'p': /* ldap port */
492 ldapport = strtol (optarg, NULL, 10);
495 case 's': /* scope */
496 if (strcasecmp (optarg, "base") == 0)
497 scope = LDAP_SCOPE_BASE;
498 else if (strcasecmp (optarg, "one") == 0)
499 scope = LDAP_SCOPE_ONELEVEL;
500 else if (strcasecmp (optarg, "sub") == 0)
501 scope = LDAP_SCOPE_SUBTREE;
504 fprintf (stderr, "scope should be base, one, or sub\n");
509 case 't': /* target dn */
510 targetdn = strdup (optarg);
513 case 'v': /* verbose */
517 case 'W': /* promt for bind password */
521 case 'w': /* bind password */
522 bindpw = strdup (optarg);
526 for( p = optarg; *p == '\0'; p++ ) {
532 case 'Y': /* salt length */
533 salt.len = strtol (optarg, NULL, 10);
536 case 'y': /* user specified salt */
537 salt.len = strlen (optarg);
538 salt.salt = (unsigned char *)strdup (optarg);
541 case 'z': /* time limit */
542 sizelimit = strtol (optarg, NULL, 10);
551 if (!(argc - optind < 1))
552 filtpattern = strdup (argv[optind]);
554 /* check for target(s) */
555 if (!filtpattern && !targetdn)
558 /* handle bind password */
560 bindpw = strdup (getpass ("Enter LDAP password: "));
562 /* handle new password */
566 newpw = strdup (getpass ("New password: "));
567 cknewpw = getpass ("Re-enter new password: ");
569 if (strncmp (newpw, cknewpw, strlen (newpw)))
571 fprintf (stderr, "passwords do not match\n");
572 return ( EXIT_FAILURE );
577 if( ber_set_option( NULL, LBER_OPT_DEBUG_LEVEL, &debug ) != LBER_OPT_SUCCESS ) {
578 fprintf( stderr, "Could not set LBER_OPT_DEBUG_LEVEL %d\n", debug );
580 if( ldap_set_option( NULL, LDAP_OPT_DEBUG_LEVEL, &debug ) != LDAP_OPT_SUCCESS ) {
581 fprintf( stderr, "Could not set LDAP_OPT_DEBUG_LEVEL %d\n", debug );
586 (void) SIGNAL( SIGPIPE, SIG_IGN );
588 /* seed random number generator */
590 #ifdef HAVE_GETTIMEOFDAY
591 /* this is of questionable value
592 * gettimeofday may not provide much usec
596 gettimeofday (&tv, NULL);
597 srand(tv.tv_sec * (tv.tv_usec + 1));
600 /* The traditional seed */
601 srand((unsigned)time( NULL ));
604 /* connect to server */
605 if ((ld = ldap_init (ldaphost, ldapport)) == NULL)
607 perror ("ldap_init");
608 return ( EXIT_FAILURE );
612 if (timelimit != -1 &&
613 ldap_set_option( ld, LDAP_OPT_TIMELIMIT, (void *) &timelimit ) != LDAP_OPT_SUCCESS )
615 fprintf( stderr, "Could not set LDAP_OPT_TIMELIMIT %d\n", timelimit );
617 if (sizelimit != -1 &&
618 ldap_set_option( ld, LDAP_OPT_SIZELIMIT, (void *) &sizelimit ) != LDAP_OPT_SUCCESS )
620 fprintf( stderr, "Could not set LDAP_OPT_SIZELIMIT %d\n", sizelimit );
623 /* this seems prudent */
625 int deref = LDAP_DEREF_NEVER;
626 ldap_set_option( ld, LDAP_OPT_DEREF, &deref);
628 /* don't chase referrals */
629 ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_OFF );
632 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, &version ) != LDAP_OPT_SUCCESS )
634 fprintf( stderr, "Could not set LDAP_OPT_PROTOCOL_VERSION %d\n", version );
637 /* authenticate to server */
638 if (ldap_bind_s (ld, binddn, bindpw, authmethod) != LDAP_SUCCESS)
640 ldap_perror (ld, "ldap_bind");
641 return ( EXIT_FAILURE );
648 /* insert code here =) */
651 modify_dn (ld, targetdn, pwattr, NULL, newpw, hashtype, &salt);
657 LDAPMessage *result = NULL, *e;
663 sprintf (filter, "%s", filtpattern);
664 i = ldap_search_s (ld, base, scope, filter, attrs, 0, &result);
665 if (i != LDAP_SUCCESS &&
666 i != LDAP_TIMELIMIT_EXCEEDED &&
667 i != LDAP_SIZELIMIT_EXCEEDED)
669 ldap_perror (ld, "ldap_search");
670 return ( EXIT_FAILURE );
673 for (e = ldap_first_entry (ld, result); e; e = ldap_next_entry (ld, e))
675 char *dn = ldap_get_dn (ld, e);
678 struct berval **pw_vals = ldap_get_values_len (ld, e, pwattr);
679 modify_dn (ld, dn, pwattr, pw_vals ? pw_vals[0]->bv_val : NULL, newpw, hashtype, &salt);
681 ldap_value_free_len (pw_vals);
687 /* disconnect from server */
690 return ( EXIT_SUCCESS );