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<?php |
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|
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namespace AATXT\App\Utilities; |
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|
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use RuntimeException; |
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|
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final class Encryption |
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{ |
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private string $key; |
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private string $salt; |
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|
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public function __construct() |
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{ |
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$this->key = $this->getKey(); |
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$this->salt = $this->getSalt(); |
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} |
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|
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/** |
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* @return Encryption |
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*/ |
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public static function make(): Encryption |
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{ |
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return new self(); |
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} |
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|
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/** |
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* @param string $value |
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* @return string|bool |
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*/ |
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public function encrypt(string $value): string |
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{ |
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if (empty($value)) { |
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return ''; |
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} |
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|
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if (!extension_loaded('openssl')) { |
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return $value; |
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} |
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|
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$method = 'aes-256-ctr'; |
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$ivLength = openssl_cipher_iv_length($method); |
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$iv = openssl_random_pseudo_bytes($ivLength); |
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$raw_value = openssl_encrypt($value . $this->salt, $method, $this->key, 0, $iv); |
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if (!$raw_value) { |
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throw new RuntimeException('Encryption failed.'); |
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} |
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|
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return base64_encode($iv . $raw_value); |
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} |
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|
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/** |
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* @param string $rawValue |
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* @return string|bool |
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*/ |
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public function decrypt(string $rawValue): string |
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{ |
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if (empty($rawValue)) { |
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return ''; |
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} |
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|
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/** @noinspection DuplicatedCode */ |
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if (!extension_loaded('openssl')) { |
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return $rawValue; |
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} |
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|
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$rawValue = base64_decode($rawValue, true); |
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|
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$method = 'aes-256-ctr'; |
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$ivLength = openssl_cipher_iv_length($method); |
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$iv = substr($rawValue, 0, $ivLength); |
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|
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$rawValue = substr($rawValue, $ivLength); |
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|
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$value = openssl_decrypt($rawValue, $method, $this->key, 0, $iv); |
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|
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if (!$value || substr($value, -strlen($this->salt)) !== $this->salt) { |
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throw new RuntimeException('Encryption failed.'); |
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} |
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|
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return substr($value, 0, -strlen($this->salt)); |
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} |
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|
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/** |
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* Get key from WordPress Authentication Unique Keys and Salts |
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*/ |
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private function getKey(): string |
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{ |
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if (defined('LOGGED_IN_KEY') && '' !== LOGGED_IN_KEY) { |
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return LOGGED_IN_KEY; |
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} |
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|
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// If this is reached, you're either not on a live site or have a serious security issue. |
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return 'warning-not-logged-in-key-constant-defined'; |
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} |
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|
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/** |
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* Get salt from WordPress Authentication Unique Keys and Salts |
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*/ |
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public function getSalt(): string |
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{ |
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if (defined('LOGGED_IN_SALT') && '' !== LOGGED_IN_SALT) { |
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return LOGGED_IN_SALT; |
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} |
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|
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// If this is reached, you're either not on a live site or have a serious security issue. |
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return 'warning-not-logged-in-salt-constant-defined'; |
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} |
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} |
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|
