summaryrefslogtreecommitdiff
path: root/plugins/password/drivers/ldap_simple.php
blob: 482b7e56fc4ea27a5e5582b153c578344d0d1ba6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
<?php

/**
 * Simple LDAP Password Driver
 *
 * Driver for passwords stored in LDAP
 * This driver is based on Edouard's LDAP Password Driver, but does not
 * require PEAR's Net_LDAP2 to be installed
 * 
 * @version 1.0 (2010-07-31)
 * @author Wout Decre <wout@canodus.be>
 */
function password_save($curpass, $passwd)
{
	$rcmail = rcmail::get_instance();

	// Connect
	if (!$ds = ldap_connect($rcmail->config->get('password_ldap_host'), $rcmail->config->get('password_ldap_port'))) {
		ldap_unbind($ds);
		return PASSWORD_CONNECT_ERROR;
	}

	// Set protocol version
	if (!ldap_set_option($ds, LDAP_OPT_PROTOCOL_VERSION, $rcmail->config->get('password_ldap_version'))) {
		ldap_unbind($ds);
		return PASSWORD_CONNECT_ERROR;
	}

	// Start TLS
	if ($rcmail->config->get('password_ldap_starttls')) {
		if (!ldap_start_tls($ds)) {
			ldap_unbind($ds);
			return PASSWORD_CONNECT_ERROR;
		}
	}

	// Build user DN
	if ($user_dn = $rcmail->config->get('password_ldap_userDN_mask')) {
		$user_dn = ldap_simple_substitute_vars($user_dn);
	} else {
		$user_dn = ldap_simple_search_userdn($rcmail, $ds);
	}

	if (empty($user_dn)) {
		ldap_unbind($ds);
		return PASSWORD_CONNECT_ERROR;
	}

	// Connection method
	switch ($rcmail->config->get('password_ldap_method')) {
		case 'admin':
			$binddn = $rcmail->config->get('password_ldap_adminDN');
			$bindpw = $rcmail->config->get('password_ldap_adminPW');
			break;
		case 'user':
		default:
			$binddn = $user_dn;
			$bindpw = $curpass;
			break;
	}


	$crypted_pass = ldap_simple_hash_password($passwd, $rcmail->config->get('password_ldap_encodage'));
	$lchattr      = $rcmail->config->get('password_ldap_lchattr');
	$pwattr       = $rcmail->config->get('password_ldap_pwattr');
    $smbpwattr    = $rcmail->config->get('password_ldap_samba_pwattr');
    $smblchattr   = $rcmail->config->get('password_ldap_samba_lchattr');
    $samba        = $rcmail->config->get('password_ldap_samba');

    // Support password_ldap_samba option for backward compat.
    if ($samba && !$smbpwattr) {
        $smbpwattr  = 'sambaNTPassword';
        $smblchattr = 'sambaPwdLastSet';
    }

	// Crypt new password
	if (!$crypted_pass) {
		return PASSWORD_CRYPT_ERROR;
	}

    // Crypt new Samba password
    if ($smbpwattr && !($samba_pass = ldap_simple_hash_password($passwd, 'samba'))) {
	    return PASSWORD_CRYPT_ERROR;
    }

	// Bind
	if (!ldap_bind($ds, $binddn, $bindpw)) {
		ldap_unbind($ds);
		return PASSWORD_CONNECT_ERROR;
	}

	$entree[$pwattr] = $crypted_pass;

	// Update PasswordLastChange Attribute if desired
	if ($lchattr) {
		$entree[$lchattr] = (int)(time() / 86400);
	}

    // Update Samba password
    if ($smbpwattr) {
        $entree[$smbpwattr] = $samba_pass;
    }

    // Update Samba password last change
    if ($smblchattr) {
        $entree[$smblchattr] = time();
    }

	if (!ldap_modify($ds, $user_dn, $entree)) {
		ldap_unbind($ds);
		return PASSWORD_CONNECT_ERROR;
	}

	// All done, no error
	ldap_unbind($ds);
	return PASSWORD_SUCCESS;
}

/**
 * Bind with searchDN and searchPW and search for the user's DN
 * Use search_base and search_filter defined in config file
 * Return the found DN
 */
function ldap_simple_search_userdn($rcmail, $ds)
{
	/* Bind */
	if (!ldap_bind($ds, $rcmail->config->get('password_ldap_searchDN'), $rcmail->config->get('password_ldap_searchPW'))) {
		return false;
	}

	/* Search for the DN */
	if (!$sr = ldap_search($ds, $rcmail->config->get('password_ldap_search_base'), ldap_simple_substitute_vars($rcmail->config->get('password_ldap_search_filter')))) {
		return false;
	}

	/* If no or more entries were found, return false */
	if (ldap_count_entries($ds, $sr) != 1) {
		return false;
	}

	return ldap_get_dn($ds, ldap_first_entry($ds, $sr));
}

/**
 * Substitute %login, %name, %domain, %dc in $str
 * See plugin config for details
 */
function ldap_simple_substitute_vars($str)
{
	$str = str_replace('%login', $_SESSION['username'], $str);
	$str = str_replace('%l', $_SESSION['username'], $str);

	$parts = explode('@', $_SESSION['username']);

	if (count($parts) == 2) {
        $dc = 'dc='.strtr($parts[1], array('.' => ',dc=')); // hierarchal domain string

		$str = str_replace('%name', $parts[0], $str);
        $str = str_replace('%n', $parts[0], $str);
        $str = str_replace('%dc', $dc, $str);
		$str = str_replace('%domain', $parts[1], $str);
		$str = str_replace('%d', $parts[1], $str);
	}

	return $str;
}

/**
 * Code originaly from the phpLDAPadmin development team
 * http://phpldapadmin.sourceforge.net/
 *
 * Hashes a password and returns the hash based on the specified enc_type
 */
function ldap_simple_hash_password($password_clear, $encodage_type)
{
	$encodage_type = strtolower($encodage_type);
	switch ($encodage_type) {
		case 'crypt':
			$crypted_password = '{CRYPT}' . crypt($password_clear, ldap_simple_random_salt(2));
			break;
		case 'ext_des':
			/* Extended DES crypt. see OpenBSD crypt man page */
			if (!defined('CRYPT_EXT_DES') || CRYPT_EXT_DES == 0) {
				/* Your system crypt library does not support extended DES encryption */
				return false;
			}
			$crypted_password = '{CRYPT}' . crypt($password_clear, '_' . ldap_simple_random_salt(8));
			break;
		case 'md5crypt':
			if (!defined('CRYPT_MD5') || CRYPT_MD5 == 0) {
				/* Your system crypt library does not support md5crypt encryption */
				return false;
			}
			$crypted_password = '{CRYPT}' . crypt($password_clear, '$1$' . ldap_simple_random_salt(9));
			break;
		case 'blowfish':
			if (!defined('CRYPT_BLOWFISH') || CRYPT_BLOWFISH == 0) {
				/* Your system crypt library does not support blowfish encryption */
				return false;
			}
			/* Hardcoded to second blowfish version and set number of rounds */
			$crypted_password = '{CRYPT}' . crypt($password_clear, '$2a$12$' . ldap_simple_random_salt(13));
			break;
		case 'md5':
			$crypted_password = '{MD5}' . base64_encode(pack('H*', md5($password_clear)));
			break;
		case 'sha':
			if (function_exists('sha1')) {
				/* Use PHP 4.3.0+ sha1 function, if it is available */
				$crypted_password = '{SHA}' . base64_encode(pack('H*', sha1($password_clear)));
			} else if (function_exists('mhash')) {
				$crypted_password = '{SHA}' . base64_encode(mhash(MHASH_SHA1, $password_clear));
			} else {
				/* Your PHP install does not have the mhash() function */
				return false;
			}
			break;
		case 'ssha':
			if (function_exists('mhash') && function_exists('mhash_keygen_s2k')) {
				mt_srand((double) microtime() * 1000000 );
				$salt = mhash_keygen_s2k(MHASH_SHA1, $password_clear, substr(pack('h*', md5(mt_rand())), 0, 8), 4);
				$crypted_password = '{SSHA}' . base64_encode(mhash(MHASH_SHA1, $password_clear . $salt) . $salt);
			} else {
				/* Your PHP install does not have the mhash() function */
				return false;
			}
			break;
		case 'smd5':
			if (function_exists('mhash') && function_exists('mhash_keygen_s2k')) {
				mt_srand((double) microtime() * 1000000 );
				$salt = mhash_keygen_s2k(MHASH_MD5, $password_clear, substr(pack('h*', md5(mt_rand())), 0, 8), 4);
				$crypted_password = '{SMD5}' . base64_encode(mhash(MHASH_MD5, $password_clear . $salt) . $salt);
			} else {
				/* Your PHP install does not have the mhash() function */
				return false;
			}
			break;
        case 'samba':
            if (function_exists('hash')) {
                $crypted_password = hash('md4', rcube_charset_convert($password_clear, RCMAIL_CHARSET, 'UTF-16LE'));
            } else {
				/* Your PHP install does not have the hash() function */
				return false;
            }
            break;
		case 'clear':
		default:
			$crypted_password = $password_clear;
	}

	return $crypted_password;
}

/**
 * Code originaly from the phpLDAPadmin development team
 * http://phpldapadmin.sourceforge.net/
 *
 * Used to generate a random salt for crypt-style passwords
 */
function ldap_simple_random_salt($length)
{
	$possible = '0123456789' . 'abcdefghijklmnopqrstuvwxyz' . 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' . './';
	$str = '';
	// mt_srand((double)microtime() * 1000000);
	while (strlen($str) < $length) {
		$str .= substr($possible, (rand() % strlen($possible)), 1);
	}

	return $str;
}