一个 aes-js 库 里加密算法用 PHP 怎么写?

[wangwenfan]

文档地址：https://github.com/ricmoo/aes-js#readme

下面是官方文档 demo 代码

const aesjs = require('aes-js');
// An example 128-bit key
var key = [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 ];

// The initialization vector (must be 16 bytes)
var iv = [ 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34,35, 36 ];

// Convert text to bytes (must be a multiple of the segment size you choose below)
var text = 'TextMustBeAMultipleOfSegmentSize';
var textBytes = aesjs.utils.utf8.toBytes(text);

// The segment size is optional, and defaults to 1
var segmentSize = 8;
// console.log(iv);
// 
var aesCfb = new aesjs.ModeOfOperation.cfb(key, iv, segmentSize);
// var encryptedBytes = aesCfb.encrypt(textBytes);

// To print or store the binary data, you may convert it to hex
var encryptedHex = aesjs.utils.hex.fromBytes(encryptedBytes);
console.log(encryptedHex);
// "55e3af2638c560b4fdb9d26a630733ea60197ec23deb85b1f60f71f10409ce27"

// When ready to decrypt the hex string, convert it back to bytes
var encryptedBytes = aesjs.utils.hex.toBytes(encryptedHex);

// The cipher feedback mode of operation maintains internal state,
// so to decrypt a new instance must be instantiated.
var aesCfb = new aesjs.ModeOfOperation.cfb(key, iv, 8);
var decryptedBytes = aesCfb.decrypt(encryptedBytes);

// Convert our bytes back into text
var decryptedText = aesjs.utils.utf8.fromBytes(decryptedBytes);
console.log(decryptedText);
// "TextMustBeAMultipleOfSegmentSize"

• 怎么改造下用 php 来写?

<?php
// 加密算法
$encryptMethod = 'aes-128-cfb';
// 明文数据
$data = 'TextMustBeAMultipleOfSegmentSize';
$secret = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
// 生成 IV
$ivLength = openssl_cipher_iv_length($encryptMethod);
$iv = openssl_random_pseudo_bytes($ivLength, $isStrong);
if (false === $iv && false === $isStrong) {
	die('IV generate failed');
}
// 加密
$encrypted = openssl_encrypt($data, $encryptMethod, $secret, 8, $iv);

[zy445566]

写个锤子，用 node 起 http 服务，用 PHP 去掉用不就完事了

[xiangyuecn]

用固定 iv、密码、填充方式 不管用什么语言同一明文 AES 加密出来都是一样的。所以不用考虑怎么改造。。。直接研究 PHP 怎么进行 AES 加密。注意：js 那里的 iv 是固定的，不能乱写。

[wangwenfan]

@xiangyuecn 我有点不懂的是上面 js 的 iv 定义的是数组，看了文档 php 的 iv 一般是字符串，这两个怎么来统一