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PHP 加密解密示例

<?php
/**
* AES加密解密
* @link https://www.php.net/manual/zh/function.openssl-encrypt.php
* @link https://www.php.net/manual/zh/function.openssl-decrypt.php
*/
const AES_BLOCK_SIZE = 16;
const AES_KEY_LENGTH = 32;
const AES_ALGORITHM = 'aes-256-cbc';
const AES_OPTIONS = OPENSSL_RAW_DATA;
class AesOpenssl
{
private $key;
public function __construct($key = '')
{
if (empty($key)) {
throw new Exception('Key is empty');
}
if (strlen($key) !== AES_KEY_LENGTH) {
throw new Exception('Key length must be ' . AES_KEY_LENGTH);
}
$this->key = $key;
}

public function encrypt($data)
{
$iv = openssl_random_pseudo_bytes(AES_BLOCK_SIZE);
$result = openssl_encrypt($data, AES_ALGORITHM, $this->key, AES_OPTIONS, $iv);
$result = $iv . $result;
return strtoupper(bin2hex($result));
}

public function decrypt($data)
{
$data = hex2bin(strtolower($data));
$iv = substr($data, 0, AES_BLOCK_SIZE);
$data = substr($data, AES_BLOCK_SIZE);
return openssl_decrypt($data, AES_ALGORITHM, $this->key, AES_OPTIONS, $iv);
}
}

$aes = new AesOpenssl('rEbFIynZ5dTlxzgUcIcCzk7gtXNwSiil');
$encrypted = $aes->encrypt('123aaa');
echo '加密: '.$encrypted . PHP_EOL;
echo '解密: '.$aes->decrypt($encrypted) . PHP_EOL;