neteasecloudmusicapi/util/crypto.js

const crypto = require('crypto')
const iv = Buffer.from('0102030405060708')
const presetKey = Buffer.from('0CoJUm6Qyw8W8jud')
const linuxapiKey = Buffer.from('rFgB&h#%2?^eDg:Q')
const base62 = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
const publicKey = '-----BEGIN PUBLIC KEY-----\nMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDgtQn2JZ34ZC28NWYpAUd98iZ37BUrX/aKzmFbt7clFSs6sXqHauqKWqdtLkF2KexO40H1YTX8z2lSgBBOAxLsvaklV8k4cBFK9snQXE9/DDaFt6Rr7iVZMldczhC0JNgTz+SHXT6CBHuX3e9SdB1Ua44oncaTWz7OBGLbCiK45wIDAQAB\n-----END PUBLIC KEY-----'

const aesEncrypt = (buffer, mode, key, iv) => {
    const cipher = crypto.createCipheriv('aes-128-' + mode, key, iv)
    return Buffer.concat([cipher.update(buffer),cipher.final()])
}

const rsaEncrypt = (buffer, key) => {
    buffer = Buffer.concat([Buffer.alloc(128 - buffer.length), buffer])
    return crypto.publicEncrypt({key: key, padding: crypto.constants.RSA_NO_PADDING}, buffer)
}

const weapi = (object) => {
    const text = JSON.stringify(object)
    const secretKey = crypto.randomBytes(16).map(n => (base62.charAt(n % 62).charCodeAt()))
    return {
        params: aesEncrypt(Buffer.from(aesEncrypt(Buffer.from(text), 'cbc', presetKey, iv).toString('base64')), 'cbc', secretKey, iv).toString('base64'),
        encSecKey: rsaEncrypt(secretKey.reverse(), publicKey).toString('hex')
    }
}

const linuxapi = (object) => {
    const text = JSON.stringify(object)
    return {
        eparams: aesEncrypt(Buffer.from(text), 'ecb', linuxapiKey, '').toString('hex').toUpperCase()
    }
}

module.exports = {weapi, linuxapi}