Nest.js散列与加密实例详解

yarn add bcrypt
yarn add @types/bcrypt -D

import { Injectable } from '@nestjs/common'
import * as bcrypt from 'bcrypt'

@Injectable()
export class BcryptService {
 private static readonly SALT_ROUNDS: number = 10
 /**
 * 对比检查密码
 * @param rawStr
 * @param hashedStr
 */
 async compare(rawStr: string, hashedStr: string) {
 return bcrypt.compare(rawStr, hashedStr)
 }
 /**
 * 生成 hash
 * @param rawStr
 * @param salt
 */
 async hash(rawStr: string, salt"_blank" href="https://nodejs.org/api/crypto.html" rel="external nofollow" rel="external nofollow" >加密模块 ，可用于加密和解密等相关操作，下面进行使用 AES-256-CTR 加密方式对数据进行加密：



import { createCipheriv, randomBytes } from 'crypto'
import { promisify } from 'util'

const iv = randomBytes(16)
const password = 'Password used to generate key'

// 密钥长度取决于算法
// 在 aes256 情况下是 32 个字节长度
const key = (await promisify(scrypt)(password, 'salt', 32)) as Buffer
const cipher = createCipheriv('aes-256-ctr', key, iv)

const textToEncrypt = 'Nest'
const encryptedText = Buffer.concat([
 cipher.update(textToEncrypt),
 cipher.final()
])




如果需要解密也很简单：


import { createDecipheriv } from 'crypto'

const decipher = createDecipheriv('aes-256-ctr', key, iv)
const decryptedText = Buffer.concat([
 decipher.update(encryptedText),
 decipher.final()
])




0x3 参考


Encryption and Hashing
Node.js crypto
node.bcrypt.js
总结