PHP Class: x_class_crypt

The x_class_crypt class provides encryption and decryption methods using the AES-256-CBC algorithm by default. It allows for secure data handling by encrypting and decrypting data with a specified key.

Use the class by including /_framework/classes/x_class_crypt.php.

Dependencies

• PHP 7.0–7.4
• PHP 8.0–8.4

PHP-Modules

• openssl: Required for encryption and decryption operations.

Methods

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__construct

Contructor for the class.

Parameter	Type	Description	Default
$algo	string	The encryption algorithm to use. Must be supported by OpenSSL.	'aes-256-cbc'

Return Value	When does this return value occur?
void	Always. Constructor initializes the class with selected algorithm.

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encrypt

Encrypt Data and Return

Parameter	Type	Description	Default
$data	string	The plaintext data to encrypt.	None
$key	string	Base64-encoded key used for encryption. Must match algorithm requirements.	None

Return Value	When does this return value occur?
string	Returns base64-encoded encrypted data with IV included.

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decrypt

Decrypt Data and Return

Parameter	Type	Description	Default
$data	string	Base64-encoded string containing the encrypted data and IV.	None
$key	string	Base64-encoded key used for decryption. Must match encryption key.	None

Return Value	When does this return value occur?
string	Returns decrypted plaintext if successful.

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Example

$key = base64_encode(openssl_random_pseudo_bytes(32)); // generate secure key
$crypt = new x_class_crypt(); // defaults to aes-256-cbc

$original = "Secret Message!";
$encrypted = $crypt->encrypt($original, $key);
$decrypted = $crypt->decrypt($encrypted, $key);

echo "Original: $original\n";
echo "Encrypted: $encrypted\n";
echo "Decrypted: $decrypted\n";