openssl aes-128-cbc 用 nodejs 怎么写？ nodejs 的 crypto 库 vi 只认 16 位额……

[lqzhgood]

openssl enc -d -aes-128-cbc -in ./1qaz  -K bc1f89d3421a6f097262c348890a9acc  -out decrypted.jpg -iv bc1f89d3421a6f097262c348890a9acc  

我用 nodejs 这么写，一直报错 Invalid IV length 求教。。。。

样本文件下载地址 https://netcut.cn/nodejs

const crypto = require("crypto");
const key = "bc1f89d3421a6f097262c348890a9acc";
const iv = key;
const cipher = crypto.createCipheriv('aes-128-cbc', key, iv);

const encryptedBytes = fs.readFileSync('./1qaz');
cipher.update(encryptedBytes);

const data = cipher.final('hex');

console.log('data', data);

const encryptedBytes = fs.readFileSync('./1qaz');

const decipher = crypto.createCipheriv('aes-128-cbc', Buffer.from(key, 'hex'), Buffer.from(iv, 'hex'));
const data = Buffer.concat([decipher.update(encryptedBytes), decipher.final()]);

fs.writeFileSync('./test.jpg', data);

上面的附言里面 createDecipheriv 写成 createCipheriv 了………………

const key = "bc1f89d3421a6f097262c348890a9acc";
const iv = key;
const encryptedBytes = fs.readFileSync('./1qaz');

const decipher = crypto.createDecipheriv('aes-128-cbc', Buffer.from(key, 'hex'), Buffer.from(iv, 'hex'));
const data = Buffer.concat([decipher.update(encryptedBytes), decipher.final()]);

fs.writeFileSync('./test.jpg', data);

再加个 stream 形式的， 留给后来人

const key = "bc1f89d3421a6f097262c348890a9acc";
const iv = key;

let input = fs.createReadStream('./1qaz');
let output = fs.createWriteStream('test2.jpg');

const decipher = crypto.createDecipheriv('aes-128-cbc', Buffer.from(key, 'hex'), Buffer.from(iv, 'hex'));

input.pipe(decipher).pipe(output);

output.on('finish', () => {
    console.log('ok!!');
});

[Mitt]

128/8 = 16

[lqzhgood]

@Mitt openssl 是怎么把 32 位的 vi `bc1f89d3421a6f097262c348890a9acc` 处理成 16 位的呢。

[Mitt]

16 字节才是正确的，32 位是因为它是十六进制，你 hex2bin 就好了

[Jirajine]

显然 key 接受的类型是二进制数据，而不是字符串。

[lqzhgood]

@Jirajine
Nodejs http://nodejs.cn/api/crypto.html#crypto_crypto_createcipheriv_algorithm_key_iv_options
不是说 key 支持 String 类型么~

[lqzhgood]

@Mitt 能再说清楚点么？
我把 key 写为 Buffer.from([
0xbc, 0x1f, 0x89, 0xd3, 0x42, 0x1a, 0x6f, 0x09, 0x72, 0x62, 0xc3, 0x48, 0x89, 0x0a, 0x9a, 0xcc,
])

还是无法解出~~

[EPr2hh6LADQWqRVH]

@lqzhgood Buffer.from('bc1f89d3421a6f097262c348890a9acc', 'hex'), 他俩类型都统一成 Buffer

[Jirajine]

> Both arguments must be 'utf8' encoded strings
这里的意思应该是指把 string 看作 utf8 encoded bytes, 而你这里显然不是。
改成 const cipher = crypto.createCipheriv('aes-128-cbc', Buffer.from(key,'hex'), Buffer.from(iv,'hex'));

只能说文档比较糟糕，缺乏例子且描述较为模糊。

[lqzhgood]

@avastms
@Jirajine
额， 解出来还是不对…… T.T

[lqzhgood]

@avastms
@Jirajine
额 是我错了。。。

createDecipheriv 写成 createCipheriv 了………………
从中午搞到现在 。。。 想死 。


还是谢谢各位了 。。。

[xxcheng]

太感谢了