2 * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
3 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
6 * Copyright 1998, David E. Storey, All rights reserved.
7 * This software is not subject to any license of The Murphy Group, Inc.
8 * or George Mason University.
10 * Redistribution and use in source and binary forms are permitted only
11 * as authorized by the OpenLDAP Public License. A copy of this
12 * license is available at http://www.OpenLDAP.org/license.html or
13 * in file LICENSE in the top-level directory of the distribution.
15 * ldappasswd.c - program to modify passwords in an LDAP tree
17 * Author: David E. Storey <dave@tamos.net>
24 #include <ac/stdlib.h>
27 #include <ac/signal.h>
28 #include <ac/socket.h>
29 #include <ac/string.h>
31 #include <ac/unistd.h>
36 #include <lutil_md5.h>
37 #include <lutil_sha1.h>
39 #include "ldap_defaults.h"
42 #define CEILING(x) ((double)(x) > (int)(x) ? (int)(x) + 1 : (int)(x))
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 = CEILING (len / 3) * 4 + 1;
109 base64digest = (char *)malloc (b64_len);
110 if (lutil_b64_ntop (npasswd, len, base64digest, b64_len) < 0)
119 return (base64digest);
123 * if you'd like to write a better salt generator, please, be my guest.
127 make_salt (Salt * salt, unsigned int len)
134 salt->salt = (unsigned char *)malloc (len);
136 for (len = 0; len < salt->len; len++)
137 salt->salt[len] = rand () & 0xff;
145 gen_pass (unsigned int len)
147 static const unsigned char autogen[] =
148 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890.,";
155 make_salt (&salt, len);
156 for (i = 0; i < len; i++)
157 salt.salt[i] = autogen[salt.salt[i] % (sizeof (autogen) - 1)];
159 return ((char *)salt.salt);
162 #ifdef SLAPD_CLEARTEXT
164 hash_none (const char *pw_in, Salt * salt)
166 return (strdup (pw_in));
172 hash_crypt (const char *pw_in, Salt * salt)
174 static const unsigned char crypt64[] =
175 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./";
176 char *crypted_pw = NULL;
179 if (salt && salt->salt && strlen ((char *)salt->salt) >= 2)
182 if (!(isalnum(salt->salt[0]) || salt->salt[0] == '.' || salt->salt[0] == '/'))
183 salt->salt[0] = crypt64[salt->salt[0] % (sizeof (crypt64) - 1)];
184 if (!(isalnum(salt->salt[1]) || salt->salt[1] == '.' || salt->salt[1] == '/'))
185 salt->salt[1] = crypt64[salt->salt[1] % (sizeof (crypt64) - 1)];
187 crypted_pw = crypt (pw_in, (char *)salt->salt);
191 make_salt (&lsalt, 2);
192 lsalt.salt[0] = crypt64[lsalt.salt[0] % (sizeof (crypt64) - 1)];
193 lsalt.salt[1] = crypt64[lsalt.salt[1] % (sizeof (crypt64) - 1)];
194 crypted_pw = crypt (pw_in, (char *)lsalt.salt);
197 return (strdup (crypted_pw));
202 hash_md5 (const char *pw_in, Salt * salt)
204 lutil_MD5_CTX MD5context;
205 unsigned char MD5digest[16];
207 lutil_MD5Init (&MD5context);
208 lutil_MD5Update (&MD5context,
209 (const unsigned char *)pw_in, strlen(pw_in));
210 if (salt && salt->salt && salt->len)
211 lutil_MD5Update (&MD5context, salt->salt, salt->len);
212 lutil_MD5Final (MD5digest, &MD5context);
214 return (pw_encode (MD5digest, salt, sizeof (MD5digest)));
218 hash_sha1 (const char *pw_in, Salt * salt)
220 lutil_SHA1_CTX SHA1context;
221 unsigned char SHA1digest[20];
223 lutil_SHA1Init (&SHA1context);
224 lutil_SHA1Update (&SHA1context,
225 (const unsigned char *)pw_in, strlen(pw_in));
226 if (salt && salt->salt && salt->len)
227 lutil_SHA1Update (&SHA1context, salt->salt, salt->len);
228 lutil_SHA1Final (SHA1digest, &SHA1context);
230 return (pw_encode (SHA1digest, salt, sizeof (SHA1digest)));
233 static Hash hashes[] =
235 #ifdef SLAPD_CLEARTEXT
236 {"none", 4, hash_none, 0, HASHTYPE_NONE, HASHTYPE_NONE, 0},
239 {"crypt", 5, hash_crypt, 1, HASHTYPE_CRYPT, HASHTYPE_CRYPT, 2},
241 {"md5", 3, hash_md5, 0, HASHTYPE_MD5, HASHTYPE_SMD5, 0},
242 {"smd5", 4, hash_md5, 1, HASHTYPE_SMD5, HASHTYPE_SMD5, 4},
243 {"sha", 3, hash_sha1, 0, HASHTYPE_SHA1, HASHTYPE_SSHA1, 0},
244 {"ssha", 4, hash_sha1, 1, HASHTYPE_SSHA1, HASHTYPE_SSHA1, 4},
245 {NULL, 0, NULL, 0, HASHTYPE_NONE, HASHTYPE_NONE, 0}
249 modify_dn (LDAP * ld, char *targetdn, char *pwattr, char *oldpw,
250 char *newpw, HashTypes htype, Salt * salt)
253 int salted = salt->salt ? 1 : 0;
254 int want_salt = salt->len && !salted;
256 char *hashed_pw = NULL;
258 LDAPMod mod, *mods[2];
260 if (!ld || !targetdn || !newpw)
263 /* auto-generate password */
265 newpw = gen_pass (auto_gen_pw);
270 make_salt (salt, salt->len);
271 htype = hashes[htype].type_salted;
273 else if (hashes[htype].default_salt_len)
275 /* user chose a salted hash and needs a salt */
279 salt->len = hashes[htype].default_salt_len;
280 make_salt (salt, salt->len);
285 hashed_pw = hashes[htype].func (newpw, salt->len ? salt : NULL);
287 /* return salt back to its original state */
294 buf = (char *)malloc (hashes[htype].namesz + 3 + strlen (hashed_pw));
296 sprintf (buf, "{%s}%s", hashes[htype].name, hashed_pw);
298 sprintf (buf, "%s", hashed_pw);
302 printf ("%s", targetdn);
307 printf (":%s", newpw);
314 mod.mod_values = strvals;
315 mod.mod_type = pwattr;
316 mod.mod_op = LDAP_MOD_REPLACE;
320 if (!noupdates && (ret = ldap_modify_s (ld, targetdn, mods)) != LDAP_SUCCESS)
321 ldap_perror (ld, "ldap_modify");
331 fprintf (stderr, "Usage: %s [options] [filter]\n", s);
332 fprintf (stderr, " -a attrib\tpassword attribute (default: " LDAP_PASSWD_ATTRIB ")\n");
333 fprintf (stderr, " -b basedn\tbasedn to perform searches\n");
334 /* fprintf (stderr, " -C\t\tuse entry's current hash mechanism\n"); */
335 fprintf (stderr, " -D binddn\tbind dn\n");
336 fprintf (stderr, " -d level\tdebugging level\n");
337 fprintf (stderr, " -E\t\tprompt for new password\n");
338 fprintf (stderr, " -e passwd\tnew password\n");
339 fprintf (stderr, " -g passlen\tauto-generate passwords with length pwlen\n");
340 fprintf (stderr, " -H hash\thash type (default: crypt)\n");
341 fprintf (stderr, " -h host\tldap server (default: localhost)\n");
343 fprintf (stderr, " -K\t\tuse Kerberos step 1\n");
344 fprintf (stderr, " -k\t\tuse Kerberos\n");
346 fprintf (stderr, " -l time\ttime limit\n");
347 fprintf (stderr, " -n\t\tmake no modifications\n");
348 fprintf (stderr, " -P version\tprotocol version (2 or 3)\n");
349 fprintf (stderr, " -p port\tldap port\n");
350 fprintf (stderr, " -s scope\tsearch scope: base, one, sub (default: sub)\n");
351 fprintf (stderr, " -t targetdn\tdn to change password\n");
352 fprintf (stderr, " -v\t\tverbose (more v's, more verbose)\n");
353 fprintf (stderr, " -W\t\tprompt for bind password\n");
354 fprintf (stderr, " -w passwd\tbind password (for simple authentication)\n");
355 fprintf (stderr, " -Y saltlen\tsalt length to use\n");
356 /* fprintf (stderr, " -y salt\tsalt to use\n"); */
357 fprintf (stderr, " -z size\tsize limit\n");
358 exit( EXIT_FAILURE );
362 main (int argc, char *argv[])
367 char *filtpattern = NULL;
368 char *ldaphost = NULL;
369 char *targetdn = NULL;
370 char *pwattr = LDAP_PASSWD_ATTRIB;
372 int authmethod = LDAP_AUTH_SIMPLE;
373 int hashtype = HASHTYPE_CRYPT;
377 int scope = LDAP_SCOPE_SUBTREE;
392 while ((i = getopt (argc, argv, "a:b:C:D:d:Ee:g:H:h:Kkl:nP:p:s:t:vWw:Y:y:z:")) != EOF)
396 case 'a': /* password attribute */
397 pwattr = strdup (optarg);
400 case 'b': /* base search dn */
401 base = strdup (optarg);
408 case 'D': /* bind distinguished name */
409 binddn = strdup (optarg);
412 case 'd': /* debugging option */
413 debug |= atoi (optarg);
416 case 'E': /* prompt for new password */
420 case 'e': /* new password */
421 newpw = strdup (optarg);
425 auto_gen_pw = strtol (optarg, NULL, 10);
428 case 'H': /* hashes */
429 for (j = 0; hashes[j].name; j++)
431 if (!strncasecmp (optarg, hashes[j].name, hashes[j].namesz))
433 hashtype = hashes[j].type;
440 fprintf (stderr, "hash type: %s is unknown\n", optarg);
445 case 'h': /* ldap host */
446 ldaphost = strdup (optarg);
449 case 'K': /* use kerberos bind, 1st part only */
451 authmethod = LDAP_AUTH_KRBV41;
453 fprintf (stderr, "%s was not compiled with Kerberos support\n", argv[0]);
458 case 'k': /* use kerberos bind */
460 authmethod = LDAP_AUTH_KRBV4;
462 fprintf (stderr, "%s was not compiled with Kerberos support\n", argv[0]);
467 case 'l': /* time limit */
468 timelimit = strtol (optarg, NULL, 10);
471 case 'n': /* don't update entry(s) */
476 switch( atoi( optarg ) ) {
478 version = LDAP_VERSION2;
481 version = LDAP_VERSION3;
484 fprintf( stderr, "protocol version should be 2 or 3\n" );
489 case 'p': /* ldap port */
490 ldapport = strtol (optarg, NULL, 10);
493 case 's': /* scope */
494 if (strcasecmp (optarg, "base") == 0)
495 scope = LDAP_SCOPE_BASE;
496 else if (strcasecmp (optarg, "one") == 0)
497 scope = LDAP_SCOPE_ONELEVEL;
498 else if (strcasecmp (optarg, "sub") == 0)
499 scope = LDAP_SCOPE_SUBTREE;
502 fprintf (stderr, "scope should be base, one, or sub\n");
507 case 't': /* target dn */
508 targetdn = strdup (optarg);
511 case 'v': /* verbose */
515 case 'W': /* promt for bind password */
519 case 'w': /* bind password */
520 bindpw = strdup (optarg);
524 for( p = optarg; *p == '\0'; p++ ) {
530 case 'Y': /* salt length */
531 salt.len = strtol (optarg, NULL, 10);
534 case 'y': /* user specified salt */
535 salt.len = strlen (optarg);
536 salt.salt = (unsigned char *)strdup (optarg);
539 case 'z': /* time limit */
540 sizelimit = strtol (optarg, NULL, 10);
549 if (!(argc - optind < 1))
550 filtpattern = strdup (argv[optind]);
552 /* check for target(s) */
553 if (!filtpattern && !targetdn)
556 /* handle bind password */
558 bindpw = strdup (getpass ("Enter LDAP password: "));
560 /* handle new password */
564 newpw = strdup (getpass ("New password: "));
565 cknewpw = getpass ("Re-enter new password: ");
567 if (strncmp (newpw, cknewpw, strlen (newpw)))
569 fprintf (stderr, "passwords do not match\n");
570 return ( EXIT_FAILURE );
575 if( ber_set_option( NULL, LBER_OPT_DEBUG_LEVEL, &debug ) != LBER_OPT_SUCCESS ) {
576 fprintf( stderr, "Could not set LBER_OPT_DEBUG_LEVEL %d\n", debug );
578 if( ldap_set_option( NULL, LDAP_OPT_DEBUG_LEVEL, &debug ) != LDAP_OPT_SUCCESS ) {
579 fprintf( stderr, "Could not set LDAP_OPT_DEBUG_LEVEL %d\n", debug );
584 (void) SIGNAL( SIGPIPE, SIG_IGN );
586 /* seed random number generator */
588 #ifdef HAVE_GETTIMEOFDAY
589 /* this is of questionable value
590 * gettimeofday may not provide much usec
594 gettimeofday (&tv, NULL);
595 srand(tv.tv_sec * (tv.tv_usec + 1));
598 /* The traditional seed */
599 srand((unsigned)time( NULL ));
602 /* connect to server */
603 if ((ld = ldap_init (ldaphost, ldapport)) == NULL)
605 perror ("ldap_init");
606 return ( EXIT_FAILURE );
610 if (timelimit != -1 &&
611 ldap_set_option( ld, LDAP_OPT_TIMELIMIT, (void *) &timelimit ) != LDAP_OPT_SUCCESS )
613 fprintf( stderr, "Could not set LDAP_OPT_TIMELIMIT %d\n", timelimit );
615 if (sizelimit != -1 &&
616 ldap_set_option( ld, LDAP_OPT_SIZELIMIT, (void *) &sizelimit ) != LDAP_OPT_SUCCESS )
618 fprintf( stderr, "Could not set LDAP_OPT_SIZELIMIT %d\n", sizelimit );
621 /* this seems prudent */
623 int deref = LDAP_DEREF_NEVER;
624 ldap_set_option( ld, LDAP_OPT_DEREF, &deref);
628 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, &version ) != LDAP_OPT_SUCCESS )
630 fprintf( stderr, "Could not set LDAP_OPT_PROTOCOL_VERSION %d\n", version );
633 /* authenticate to server */
634 if (ldap_bind_s (ld, binddn, bindpw, authmethod) != LDAP_SUCCESS)
636 ldap_perror (ld, "ldap_bind");
637 return ( EXIT_FAILURE );
644 /* insert code here =) */
647 modify_dn (ld, targetdn, pwattr, NULL, newpw, hashtype, &salt);
653 LDAPMessage *result = NULL, *e;
659 sprintf (filter, "%s", filtpattern);
660 i = ldap_search_s (ld, base, scope, filter, attrs, 0, &result);
661 if (i != LDAP_SUCCESS &&
662 i != LDAP_TIMELIMIT_EXCEEDED &&
663 i != LDAP_SIZELIMIT_EXCEEDED)
665 ldap_perror (ld, "ldap_search");
666 return ( EXIT_FAILURE );
669 for (e = ldap_first_entry (ld, result); e; e = ldap_next_entry (ld, e))
671 char *dn = ldap_get_dn (ld, e);
674 struct berval **pw_vals = ldap_get_values_len (ld, e, pwattr);
675 modify_dn (ld, dn, pwattr, pw_vals ? pw_vals[0]->bv_val : NULL, newpw, hashtype, &salt);
677 ldap_value_free_len (pw_vals);
683 /* disconnect from server */
686 return ( EXIT_SUCCESS );