可以，我们以aes 256位对称加密对二进制数据进行加密解密，示例代码如下：
<?php
//Define cipher
$cipher = "aes-256-cbc";
//生产一个256字节的key
$encryption_key = openssl_random_pseudo_bytes(32);
// 生成并初始化 vector
$iv_size = openssl_cipher_iv_length($cipher);
$iv = openssl_random_pseudo_bytes($iv_size);
//原文
//通过pack转换成二进制
$data = pack("a32", "bfw.wiki");
$encrypted_data = openssl_encrypt($data, $cipher, $encryption_key, 0, $iv);
echo "加密后: " . $encrypted_data."\n";
//Define cipher
$cipher = "aes-256-cbc";
//Decrypt data
$decrypted_data = openssl_decrypt($encrypted_data, $cipher, $encryption_key, 0, $iv);
echo "解密后: " . $decrypted_data."\n";
?>
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