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<?php
class AesCipher {
private const OPENSSL_CIPHER_NAME = "aes-128-cbc";
private const CIPHER_KEY_LEN = 16;
private static function fixKey($key) {
if (strlen($key) < AesCipher::CIPHER_KEY_LEN) {
return str_pad("$key", AesCipher::CIPHER_KEY_LEN, "0");
}
if (strlen($key) > AesCipher::CIPHER_KEY_LEN) {
return substr($key, 0, AesCipher::CIPHER_KEY_LEN);
}
return $key;
}
static function encrypt($key, $iv, $data) {
// echo 'Data value is :' .$data;
//echo "<br>";
$encodedEncryptedData = base64_encode(openssl_encrypt($data, AesCipher::OPENSSL_CIPHER_NAME, AesCipher::fixKey($key), OPENSSL_RAW_DATA, $iv));
$encodedIV = base64_encode($iv);
$encryptedPayload = $encodedEncryptedData.":".$encodedIV;
// echo '$encryptedPayload value is :' .$encryptedPayload;
return $encryptedPayload;
}
static function decrypt($key,$iv, $data) {
$parts = explode(':', $data);
//print_r($parts); //Separate Encrypted data from iv.
$encrypted = $parts[0];
$iv = $parts[1];
$decryptedData = openssl_decrypt(base64_decode($encrypted), AesCipher::OPENSSL_CIPHER_NAME, AesCipher::fixKey($key), OPENSSL_RAW_DATA, base64_decode($iv));
return $decryptedData;
}
}