AES 加密解密 CryptoJS + php 方案

当前业务需求需要针对报文做简单加密。最终选择AES，php 端AES的实现大体就是mcrypt 或者 openssl。这里选择openssl，个人感觉openssl实现起来代码更加简洁一点。

直接上代码先

1. PHP 服务端

/**
 * AES加密
 * @param  array $data 待转换报文
 * @param  string $key 加密KEY
 * @param  string $iv 偏移量
 * @param  string $method 方法，参考资料一
 * @return string
 */
public static function opensslEncrypt(
    $data, 
    $key, 
    $iv = '', 
    $method = 'AES-256-CBC'
)
{
    $plaintext = json_encode($data);
    $str = openssl_encrypt($plaintext, $method, $key, 0, $iv);

    $search = ['+', '/'];
    $replace = ['-', '_'];
    return str_replace($search, $replace, $str);
}

/**
 * AES解密
 * @param  string $encrypt 待转换密文
 * @param  string $key 加密KEY
 * @param  string $iv 偏移量
 * @param  string $method 方法，参考资料一
 * @return array
 */
public static function opensslDecrypt(
    $encrypt, 
    $key, 
    $iv = '', 
    $method = 'AES-256-CBC'
)
{
    $replace = ['+', '/'];
    $search = ['-', '_'];
    $str = openssl_decrypt(str_replace($search, $replace, $encrypt), $method, $key, OPENSSL_ZERO_PADDING, $iv);

    $plaintext = substr($str, 0, strrpos($str, "}") + 1);

    return json_decode($plaintext, true);
}

2. JS 端代码

感谢 symfony/webpack-encore-bundle 一如既往强大的symfony提供的 encore，直接使用webpack很方便集成Crypto-JS

// 这里需要自行npm安装 crypto-js
import CryptoJS from 'crypto-js'; 

let key = '654mca0l38b489d9f306a5b8e105334b',
    iv = 'c5defg0045222c52';
    
/**
 * 加密
 * @param string work 待加密报文
 * @return string
 */
export function encrypt (word) {
    let encrypt = CryptoJS.AES.encrypt(word,CryptoJS.enc.Utf8.parse(key),{
        iv:CryptoJS.enc.Utf8.parse(iv),
        mode:CryptoJS.mode.CBC,
        padding:CryptoJS.pad.Pkcs7
    })

    return encrypt.toString();
}

/**
 * 解密
 * @param string work 待解密报文
 * @return string
 */
export function decrypt (word) {
    let decrypted = CryptoJS.AES.decrypt(word,CryptoJS.enc.Utf8.parse(key),{
        iv:CryptoJS.enc.Utf8.parse(iv),
        mode:CryptoJS.mode.CBC,
        padding:CryptoJS.pad.Pkcs7
    })

    return decrypted.toString(CryptoJS.enc.Utf8)
}

• 资料一

method 官网提供很多种，常用的不多

• AES-128-CBC
• AES-128-CFB
• AES-128-CFB1
• AES-128-CFB8
• AES-128-OFB
• AES-192-CBC
• AES-192-CFB
• AES-192-CFB1
• AES-192-CFB8
• AES-192-OFB
• AES-256-CBC
• AES-256-CFB
• AES-256-CFB1
• AES-256-CFB8
• AES-256-OFB
• BF-CBC
• BF-CFB
• BF-OFB
• CAST5-CBC
• CAST5-CFB
• CAST5-OFB
• IDEA-CBC
• IDEA-CFB
• IDEA-OFB
• aes-128-cbc
• aes-128-cfb
• aes-128-cfb1
• aes-128-cfb8
• aes-128-ofb
• aes-192-cbc
• aes-192-cfb
• aes-192-cfb1
• aes-192-cfb8
• aes-192-ofb
• aes-256-cbc
• aes-256-cfb
• aes-256-cfb1
• aes-256-cfb8
• aes-256-ofb
• bf-cbc
• bf-cfb
• bf-ofb
• cast5-cbc
• cast5-cfb
• cast5-ofb
• idea-cbc
• idea-cfb
• idea-ofb

希望对大家有帮忙，