【代码参考】适用于deno的解密代码

[JokerQyou]

仅使用 std，供参考。要点是模仿 CryptoJS 使用字符串类型 key（实际作为 password 来使用）时，使用 EvpKDF 来生成 key 和 IV。

import {crypto, toHashString} from 'https://deno.land/std@0.200.0/crypto/mod.ts'
import {decode } from 'https://deno.land/std@0.200.0/encoding/base64.ts'

const evpkdf = async (
  password: Uint8Array,
  salt: Uint8Array,
  iterations: number,
): Promise<{
  key: Uint8Array,
  iv: Uint8Array,
}> => {
  const keySize = 32
  const ivSize = 16
  const derivedKey = new Uint8Array(keySize + ivSize)
  let currentBlock = 1
  let digest = new Uint8Array(0)
  const hashLength = 16
  while ((currentBlock - 1) * hashLength < keySize + ivSize) {
    const data = new Uint8Array(digest.length + password.length + salt.length)
    data.set(digest)
    data.set(password, digest.length)
    data.set(salt, digest.length + password.length)
    digest = await crypto.subtle.digest('MD5', data).then(buf => new Uint8Array(buf))

    for (let i = 1; i < iterations; i++) {
      digest = await crypto.subtle.digest('MD5', digest).then(buf => new Uint8Array(buf))
    }
    derivedKey.set(digest, (currentBlock - 1) * hashLength)
    currentBlock++
  }
  return {
    key: derivedKey.slice(0, keySize),
    iv: derivedKey.slice(keySize),
  }
}

const main = async (env: Record<string, string>) => {
  const {
    COOKIE_CLOUD_HOST: CC_HOST,
    COOKIE_CLOUD_UUID: CC_UUID,
    COOKIE_CLOUD_PASSWORD: CC_PW,
  } = env
  const resp = await fetch(`${CC_HOST}/get/${CC_UUID}`).then(r => r.json())
  console.log(resp)
  let cookies = []
  if (resp && resp.encrypted)  {
    console.log(resp.encrypted)
    console.log(new TextDecoder().decode(decode(resp.encrypted)).slice(0, 16))
    const decoded = decode(resp.encrypted)
    // Salted__ + 8 bytes salt, followed by cipher text
    const salt = decoded.slice(8, 16)
    const cipher_text = decoded.slice(16)

    const password = await crypto.subtle.digest(
      'MD5',
      new TextEncoder().encode(`${CC_UUID}-${CC_PW}`),
    ).then(
      buf => toHashString(buf).substring(0, 16)
    ).then(
      p => new TextEncoder().encode(p)
    )
    const {key, iv} = await evpkdf(password, salt, 1)
    const privete_key = await crypto.subtle.importKey(
      'raw',
      key,
      'AES-CBC',
      false,
      ['decrypt'],
    )

    const d = await crypto.subtle.decrypt(
      {name: 'AES-CBC', iv},
      privete_key,
      cipher_text,
    )
    console.log('decrypted:', new TextDecoder().decode(d))
}

[easychen]

感谢，已经添加到仓库首页 https://github.com/easychen/CookieCloud/blob/master/README.md#deno-%E5%8F%82%E8%80%83

[ZhangTianrong]

好像最后少了一个花括号。