bit-form / includes / Core / Cryptography / SodiumCompat.php

SodiumCompat.php in Bit Form – Contact Form, Payment Forms, Multi Step Forms, Calculator & Custom Form Builder 3.1.2, at includes/Core/Cryptography/SodiumCompat.php

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1	<?php
2
3	namespace Bitcode\BitForm\Core\Cryptography;
4
5	use BitCode\BitForm\Core\Util\Log;
6	use Exception;
7
8	class SodiumCompat
9	{
10	public function __construct()
11	{
12	if (!class_exists('ParagonIE_Sodium_Compat')) {
13	require_once ABSPATH . WPINC . '/sodium_compat/autoload.php';
14	Log::debug_log(class_exists('ParagonIE_Sodium_Compat') ? 'Found' : 'ParagonIE\Sodium\Compat not found');
15	}
16	}
17
18	/**
19	* Wrap crypto_aead_*_encrypt() in a drop-dead-simple encryption interface
20	*
21	* @link https://paragonie.com/b/kIqqEWlp3VUOpRD7
22	* @param string $message
23	* @param string $key
24	* @return string
25	*/
26	public function compatEncrypt($message, $key)
27	{
28	// cast $message to string
29	if (!is_string($message)) {
30	$message = strval($message);
31	}
32
33	$nonce = \random_bytes(24); // NONCE = Number to be used ONCE, for each message
34	$encrypted = \ParagonIE_Sodium_Compat::crypto_aead_xchacha20poly1305_ietf_encrypt(
35	$message,
36	$nonce,
37	$nonce,
38	$key
39	);
40
41	return $nonce . $encrypted;
42	}
43
44	/**
45	* Wrap crypto_aead_*_decrypt() in a drop-dead-simple decryption interface
46	*
47	* @link https://paragonie.com/b/kIqqEWlp3VUOpRD7
48	* @param string $message - Encrypted message
49	* @param string $key - Encryption key
50	* @return string
51	* @throws Exception
52	*/
53	public function compatDecrypt($message, $key)
54	{
55	$nonce = mb_substr($message, 0, 24, '8bit');
56	$ciphertext = mb_substr($message, 24, null, '8bit');
57	$plaintext = \ParagonIE_Sodium_Compat::crypto_aead_xchacha20poly1305_ietf_decrypt(
58	$ciphertext,
59	$nonce,
60	$nonce,
61	$key
62	);
63	if (!is_string($plaintext)) {
64	Log::debug_log('Decryption failed');
65	}
66	return $plaintext;
67	}
68	}
69