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];
199 lutil_MD5Init (&MD5context);
200 lutil_MD5Update (&MD5context, pw_in, strlen(pw_in));
201 if (salt && salt->salt && salt->len)
202 lutil_MD5Update (&MD5context, salt->salt, salt->len);
203 lutil_MD5Final (MD5digest, &MD5context);
205 return (pw_encode (MD5digest, salt, sizeof (MD5digest)));
209 hash_sha1 (const char *pw_in, Salt * salt)
211 lutil_SHA1_CTX SHA1context;
212 unsigned char SHA1digest[20];
214 lutil_SHA1Init (&SHA1context);
215 lutil_SHA1Update (&SHA1context, pw_in, strlen(pw_in));
216 if (salt && salt->salt && salt->len)
217 lutil_SHA1Update (&SHA1context, salt->salt, salt->len);
218 lutil_SHA1Final (SHA1digest, &SHA1context);
220 return (pw_encode (SHA1digest, salt, sizeof (SHA1digest)));
223 static Hash hashes[] =
225 {"none", 4, hash_none, 0, HASHTYPE_NONE, HASHTYPE_NONE, 0},
226 {"crypt", 5, hash_crypt, 1, HASHTYPE_CRYPT, HASHTYPE_CRYPT, 2},
227 {"md5", 3, hash_md5, 0, HASHTYPE_MD5, HASHTYPE_SMD5, 0},
228 {"smd5", 4, hash_md5, 1, HASHTYPE_SMD5, HASHTYPE_SMD5, 4},
229 {"sha", 3, hash_sha1, 0, HASHTYPE_SHA1, HASHTYPE_SSHA1, 0},
230 {"ssha", 4, hash_sha1, 1, HASHTYPE_SSHA1, HASHTYPE_SSHA1, 4},
231 {NULL, 0, NULL, 0, HASHTYPE_NONE, HASHTYPE_NONE, 0}
235 modify_dn (LDAP * ld, char *targetdn, char *pwattr, char *oldpw,
236 char *newpw, HashTypes htype, Salt * salt)
239 int salted = salt->salt ? 1 : 0;
240 int want_salt = salt->len && !salted;
242 char *hashed_pw = NULL;
244 LDAPMod mod, *mods[2];
246 if (!ld || !targetdn || !newpw)
249 /* auto-generate password */
251 newpw = gen_pass (auto_gen_pw);
256 make_salt (salt, salt->len);
257 htype = hashes[htype].type_salted;
259 else if (hashes[htype].default_salt_len)
261 /* user chose a salted hash and needs a salt */
265 salt->len = hashes[htype].default_salt_len;
266 make_salt (salt, salt->len);
271 hashed_pw = hashes[htype].func (newpw, salt->len ? salt : NULL);
273 /* return salt back to it's original state */
280 buf = (char *)malloc (hashes[htype].namesz + 3 + strlen (hashed_pw));
282 sprintf (buf, "{%s}%s", hashes[htype].name, hashed_pw);
284 sprintf (buf, "%s", hashed_pw);
288 printf ("%s", targetdn);
293 printf (":%s", newpw);
300 mod.mod_vals.modv_strvals = strvals;
301 mod.mod_type = pwattr;
302 mod.mod_op = LDAP_MOD_REPLACE;
306 if (!noupdates && (ret = ldap_modify_s (ld, targetdn, mods)) != LDAP_SUCCESS)
307 ldap_perror (ld, "ldap_modify_s");
317 fprintf (stderr, "Usage: %s [options] [filter]\n", s);
318 fprintf (stderr, " -a attrib\tpassword attribute (default: %s)\n", LDAP_PASSWD_ATTRIB);
319 fprintf (stderr, " -b basedn\tbasedn to perform searches\n");
320 /* fprintf (stderr, " -C\t\tuse entry's current hash mechanism\n"); */
321 fprintf (stderr, " -D binddn\tbind dn\n");
322 fprintf (stderr, " -d level\tdebugging level\n");
323 fprintf (stderr, " -E\t\tprompt for new password\n");
324 fprintf (stderr, " -e passwd\tnew password\n");
325 fprintf (stderr, " -g passlen\tauto-generate passwords with length pwlen\n");
326 fprintf (stderr, " -H hash\thash type (default: crypt)\n");
327 fprintf (stderr, " -h host\tldap server (default: localhost)\n");
329 fprintf (stderr, " -K\t\tuse Kerberos step 1\n");
330 fprintf (stderr, " -k\t\tuse Kerberos\n");
332 fprintf (stderr, " -l time\ttime limit\n");
333 fprintf (stderr, " -n\t\tmake no modifications\n");
334 fprintf (stderr, " -P version\tprotocol version (2 or 3)\n");
335 fprintf (stderr, " -p port\tldap port\n");
336 fprintf (stderr, " -s scope\tsearch scope: base, one, sub (default: sub)\n");
337 fprintf (stderr, " -t targetdn\tdn to change password\n");
338 fprintf (stderr, " -v\t\tverbose (more v's, more verbose)\n");
339 fprintf (stderr, " -W\t\tprompt for bind password\n");
340 fprintf (stderr, " -w passwd\tbind password (for simple authentication)\n");
341 fprintf (stderr, " -Y saltlen\tsalt length to use\n");
342 /* fprintf (stderr, " -y salt\tsalt to use\n"); */
343 fprintf (stderr, " -z size\tsize limit\n");
348 main (int argc, char *argv[])
353 char *filtpattern = NULL;
354 char *ldaphost = NULL;
355 char *targetdn = NULL;
356 char *pwattr = LDAP_PASSWD_ATTRIB;
358 int authmethod = LDAP_AUTH_SIMPLE;
359 int hashtype = HASHTYPE_CRYPT;
363 int scope = LDAP_SCOPE_SUBTREE;
378 while ((i = getopt (argc, argv, "a:b:C:D:d:Ee:g:H:h:Kkl:nP:p:s:t:vWw:Y:y:z:")) != EOF)
382 case 'a': /* password attribute */
383 pwattr = STRDUP (optarg);
386 case 'b': /* base search dn */
387 base = STRDUP (optarg);
394 case 'D': /* bind distinguished name */
395 binddn = STRDUP (optarg);
398 case 'd': /* debugging option */
399 debug |= atoi (optarg);
402 case 'E': /* prompt for new password */
406 case 'e': /* new password */
407 newpw = STRDUP (optarg);
411 auto_gen_pw = strtol (optarg, NULL, 10);
414 case 'H': /* hashes */
415 for (j = 0; hashes[j].name; j++)
417 if (!strncasecmp (optarg, hashes[j].name, hashes[j].namesz))
419 hashtype = hashes[j].type;
426 fprintf (stderr, "hash type: %s is unknown\n", optarg);
431 case 'h': /* ldap host */
432 ldaphost = STRDUP (optarg);
435 case 'K': /* use kerberos bind, 1st part only */
437 authmethod = LDAP_AUTH_KRBV41;
439 fprintf (stderr, "%s was not compiled with Kerberos support\n", argv[0]);
443 case 'k': /* use kerberos bind */
445 authmethod = LDAP_AUTH_KRBV4;
447 fprintf (stderr, "%s was not compiled with Kerberos support\n", argv[0]);
451 case 'l': /* time limit */
452 timelimit = strtol (optarg, NULL, 10);
455 case 'n': /* don't update entry(s) */
463 version = LDAP_VERSION2;
466 version = LDAP_VERSION3;
471 case 'p': /* ldap port */
472 ldapport = strtol (optarg, NULL, 10);
475 case 's': /* scope */
476 if (strncasecmp (optarg, "base", 4) == 0)
477 scope = LDAP_SCOPE_BASE;
478 else if (strncasecmp (optarg, "one", 3) == 0)
479 scope = LDAP_SCOPE_ONELEVEL;
480 else if (strncasecmp (optarg, "sub", 3) == 0)
481 scope = LDAP_SCOPE_SUBTREE;
484 fprintf (stderr, "scope should be base, one, or sub\n");
489 case 't': /* target dn */
490 targetdn = STRDUP (optarg);
493 case 'v': /* verbose */
497 case 'W': /* promt for bind password */
501 case 'w': /* bind password */
502 bindpw = STRDUP (optarg);
505 case 'Y': /* salt length */
506 salt.len = strtol (optarg, NULL, 10);
509 case 'y': /* user specified salt */
510 salt.len = strlen (optarg);
511 salt.salt = (unsigned char *)STRDUP (optarg);
514 case 'z': /* time limit */
515 sizelimit = strtol (optarg, NULL, 10);
524 if (!(argc - optind < 1))
525 filtpattern = STRDUP (argv[optind]);
527 /* check for target(s) */
528 if (!filtpattern && !targetdn)
531 /* handle bind password */
533 bindpw = strdup (getpass ("Enter LDAP password: "));
535 /* handle new password */
539 newpw = strdup (getpass ("New password: "));
540 cknewpw = getpass ("Re-enter new password: ");
542 if (strncmp (newpw, cknewpw, strlen (newpw)))
544 fprintf (stderr, "passwords do not match\n");
550 lber_set_option( NULL, LBER_OPT_DEBUG_LEVEL, &debug );
551 ldap_set_option( NULL, LDAP_OPT_DEBUG_LEVEL, &debug );
554 /* connect to server */
555 if ((ld = ldap_open (ldaphost, ldapport)) == NULL)
562 if( timelimit != -1 ) {
563 ldap_set_option (ld, LDAP_OPT_TIMELIMIT, (void *)&timelimit);
565 if( sizelimit != -1 ) {
566 ldap_set_option (ld, LDAP_OPT_SIZELIMIT, (void *)&sizelimit);
569 /* this seems prudent */
571 int deref = LDAP_DEREF_NEVER;
572 ldap_set_option( ld, LDAP_OPT_DEREF, &deref);
575 if( version != -1 ) {
576 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, &version );
579 /* authenticate to server */
580 if (ldap_bind_s (ld, binddn, bindpw, authmethod) != LDAP_SUCCESS)
582 ldap_perror (ld, "ldap_bind");
590 /* insert code here =) */
593 modify_dn (ld, targetdn, pwattr, NULL, newpw, hashtype, &salt);
599 LDAPMessage *result = NULL, *e = NULL;
600 char *attrs[3] = {"dn", NULL, NULL};
604 sprintf (filter, "%s", filtpattern);
605 i = ldap_search_s (ld, base, scope, filter, attrs, 0, &result);
606 if (i != LDAP_SUCCESS &&
607 i != LDAP_TIMELIMIT_EXCEEDED &&
608 i != LDAP_SIZELIMIT_EXCEEDED)
610 ldap_perror (ld, "ldap_search_s");
614 for (e = ldap_first_entry (ld, result); e; e = ldap_next_entry (ld, e))
616 char *dn = ldap_get_dn (ld, e);
619 struct berval **pw_vals = ldap_get_values_len (ld, e, pwattr);
620 modify_dn (ld, dn, pwattr, pw_vals ? pw_vals[0]->bv_val : NULL, newpw, hashtype, &salt);
622 ldap_value_free_len (pw_vals);
628 /* disconnect from server */