vikbooking / libraries / adapter / cipher / sodium.php

sodium.php in VikBooking Hotel Booking Engine & PMS trunk, at libraries/adapter/cipher/sodium.php

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1	<?php
2	/**
3	* @package VikWP - Libraries
4	* @subpackage adapter.html
5	* @author E4J s.r.l.
6	* @copyright Copyright (C) 2023 E4J s.r.l. All Rights Reserved.
7	* @license http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
8	* @link https://vikwp.com
9	*/
10
11	// No direct access
12	defined('ABSPATH') or die('No script kiddies please!');
13
14	require_once ABSPATH . WPINC . '/sodium_compat/autoload-php7.php';
15	JLoader::import('adapter.cipher.key');
16
17	/**
18	* JCrypt cipher for sodium algorithm encryption, decryption and key generation.
19	*
20	* @since 10.1.57
21	*/
22	class JSodiumCipher
23	{
24	/**
25	* The message nonce to be used with encryption/decryption.
26	*
27	* @var string
28	*/
29	private $nonce;
30
31	/**
32	* Method to decrypt a data string.
33	*
34	* @param string $data The encrypted string to decrypt.
35	* @param JCryptKey $key The key object to use for decryption.
36	*
37	* @return string The decrypted data string.
38	*
39	* @throws RuntimeException
40	*/
41	public function decrypt($data, JCryptKey $key)
42	{
43	// validate key
44	if ($key->type !== 'sodium')
45	{
46	throw new InvalidArgumentException('Invalid key of type: ' . $key->type . '. Expected sodium.');
47	}
48
49	if (!$this->nonce)
50	{
51	throw new RuntimeException('Missing nonce to decrypt data');
52	}
53
54	$decrypted = ParagonIE_Sodium_Compat::crypto_box_open(
55	$data,
56	$this->nonce,
57	ParagonIE_Sodium_Compat::crypto_box_keypair_from_secretkey_and_publickey($key->private, $key->public)
58	);
59
60	if ($decrypted === false)
61	{
62	throw new RuntimeException('Malformed message or invalid MAC');
63	}
64
65	return $decrypted;
66	}
67
68	/**
69	* Method to encrypt a data string.
70	*
71	* @param string $data The data string to encrypt.
72	* @param JCryptKey $key The key object to use for encryption.
73	*
74	* @return string The encrypted data string.
75	*
76	* @throws RuntimeException
77	*/
78	public function encrypt($data, JCryptKey $key)
79	{
80	// validate key
81	if ($key->type !== 'sodium')
82	{
83	throw new InvalidArgumentException('Invalid key of type: ' . $key->type . '. Expected sodium.');
84	}
85
86	if (!$this->nonce)
87	{
88	throw new RuntimeException('Missing nonce to decrypt data');
89	}
90
91	return ParagonIE_Sodium_Compat::crypto_box(
92	$data,
93	$this->nonce,
94	ParagonIE_Sodium_Compat::crypto_box_keypair_from_secretkey_and_publickey($key->private, $key->public)
95	);
96	}
97
98	/**
99	* Method to generate a new encryption key object.
100	*
101	* @param array $options Key generation options.
102	*
103	* @return JCryptKey
104	*
105	* @throws RuntimeException
106	*/
107	public function generateKey(array $options = [])
108	{
109	// Generate the encryption key.
110	$pair = ParagonIE_Sodium_Compat::crypto_box_keypair();
111
112	return new JCryptKey(
113	'sodium',
114	ParagonIE_Sodium_Compat::crypto_box_secretkey($pair),
115	ParagonIE_Sodium_Compat::crypto_box_publickey($pair)
116	);
117	}
118
119	/**
120	* Check if the cipher is supported in this environment.
121	*
122	* @return bool
123	*/
124	public static function isSupported(): bool
125	{
126	return class_exists(ParagonIE_Sodium_Compat::class);
127	}
128
129	/**
130	* Set the nonce to use for encrypting/decrypting messages
131	*
132	* @param string $nonce The message nonce
133	*
134	* @return void
135	*/
136	public function setNonce($nonce)
137	{
138	if (strlen($nonce) < ParagonIE_Sodium_Compat::CRYPTO_BOX_NONCEBYTES)
139	{
140	$nonce = str_repeat($nonce, ceil(ParagonIE_Sodium_Compat::CRYPTO_BOX_NONCEBYTES / strlen($nonce)));
141	}
142
143	$this->nonce = substr($nonce, 0, ParagonIE_Sodium_Compat::CRYPTO_BOX_NONCEBYTES);
144	}
145	}
146