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1	85ad3d82	Assos Assos	<?php
2
3			/**
4			* @file
5			* Provides functions for encryption/decryption.
6			*/
7
8			/**
9	32700c57	Assos Assos	* Return a random salt of a given length for crypt-style passwords.
10	85ad3d82	Assos Assos	*
11			* @param int length
12			* The requested length.
13			*
14			* @return string
15			* A (fairly) random salt of the requested length.
16			*/
17	32700c57	Assos Assos	function ldap_servers_random_salt($length) {
18	85ad3d82	Assos Assos	$possible = '0123456789' . 'abcdefghijklmnopqrstuvwxyz' . 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' . './';
19			$salt = "";
20
21	32700c57	Assos Assos	mt_srand((double) microtime() * 1000000);
22			while (strlen($salt) < $length) {
23			$salt .= substr($possible, (rand() % strlen($possible)), 1);
24	85ad3d82	Assos Assos	}
25
26			return $salt;
27			}
28
29	32700c57	Assos Assos	/**
30			* Encryption options available.
31			*
32			* @return array
33			* Options.
34			*/
35			function _ldap_servers_encrypt_types() {
36			$options = [
37			LDAP_SERVERS_ENC_TYPE_CLEARTEXT => 'Clear text',
38			];
39	85ad3d82	Assos Assos
40	32700c57	Assos Assos	if (extension_loaded('openssl')) {
41			$options[LDAP_SERVERS_ENC_TYPE_OPENSSL] = 'OpenSSL';
42	85ad3d82	Assos Assos	}
43
44	32700c57	Assos Assos	return $options;
45	85ad3d82	Assos Assos	}
46	32700c57	Assos Assos
47	85ad3d82	Assos Assos	/**
48	32700c57	Assos Assos	* Encrypt string.
49	85ad3d82	Assos Assos	*
50	32700c57	Assos Assos	* @param $input
51			* Clear text.
52			* @param null $encryption_enabled
53			* OpenSSL or clear text.
54	85ad3d82	Assos Assos	*
55			* @return string
56	32700c57	Assos Assos	* Plain or encrypted.
57	85ad3d82	Assos Assos	*/
58	32700c57	Assos Assos	function _ldap_servers_encrypt($input, $encryption_enabled = NULL) {
59	85ad3d82	Assos Assos
60	32700c57	Assos Assos	if (!$encryption_enabled) {
61			$encryption_enabled = variable_get('ldap_servers_encryption', LDAP_SERVERS_ENC_TYPE_CLEARTEXT);
62	85ad3d82	Assos Assos	}
63
64	32700c57	Assos Assos	if ($encryption_enabled == LDAP_SERVERS_ENC_TYPE_CLEARTEXT) {
65			return $input;
66	85ad3d82	Assos Assos	}
67
68			$key = variable_get('ldap_servers_encrypt_key', drupal_get_hash_salt());
69	32700c57	Assos Assos	$iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length(LDAP_SERVERS_CYPHER_MODE));
70			$encrypted_data = openssl_encrypt($input, LDAP_SERVERS_CYPHER_MODE, $key, 0, $iv);
71	85ad3d82	Assos Assos
72	32700c57	Assos Assos	return base64_encode($encrypted_data . '::' . $iv);
73	85ad3d82	Assos Assos	}
74
75			/**
76	32700c57	Assos Assos	* Decrypt string.
77	85ad3d82	Assos Assos	*
78	32700c57	Assos Assos	* @param string $input
79			* Clear text or encrypted text.
80			* @param null $encryption_enabled
81			* OpenSSL or clear text.
82	85ad3d82	Assos Assos	*
83			* @return string
84	32700c57	Assos Assos	* Clear text.
85	85ad3d82	Assos Assos	*/
86	32700c57	Assos Assos	function _ldap_servers_decrypt($input, $encryption_enabled = NULL) {
87	85ad3d82	Assos Assos
88	32700c57	Assos Assos	if (!$encryption_enabled) {
89			$encryption_enabled = variable_get('ldap_servers_encryption', LDAP_SERVERS_ENC_TYPE_CLEARTEXT);
90	85ad3d82	Assos Assos	}
91
92	32700c57	Assos Assos	if ($encryption_enabled == LDAP_SERVERS_ENC_TYPE_CLEARTEXT) {
93			return $input;
94	85ad3d82	Assos Assos	}
95	32700c57	Assos Assos
96			$key = variable_get('ldap_servers_encrypt_key', drupal_get_hash_salt());
97			list($encrypted_data, $iv) = explode('::', base64_decode($input), 2);
98			return openssl_decrypt($encrypted_data, LDAP_SERVERS_CYPHER_MODE, $key, 0, $iv);
99	85ad3d82	Assos Assos	}

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root / drupal7 / sites / all / modules / ldap / ldap_servers / ldap_servers.encryption.inc @ 91af538d