加密解密

加密解密

createCipheriv(algorithm, key, iv)

algorithm: 算法有很多，常用的里面，aes-256-cbc，rc4加密解密速度比较快
key: 加密解密公用的密钥，可以是字符串，可以是buffer

const keyString = 'c31d92f8a2e703711ac623aef687110a'
const securityKey = (keyString instanceof Buffer) ? keyString : new Buffer(keyString)

/**
* @param {string:require} data 要加密的字符串
* @return {string} 加密后的字符串
*/
export const encrypt = (data) => {
 try {
   const iv = new Buffer(16)
   // 用aes-256-cbc算法生成cipher实例
   const cipher = crypto.createCipheriv('aes-256-cbc', securityKey, iv)
   // update待加密内容到cipher实例,编码格式为utf8，输出16进制格式
   let crypted = cipher.update(data, 'utf8', 'hex')
   // 通过final方法输出加密串
   crypted += cipher.final('hex')
   logger.info(`encrypt data[${data}] to crypted[${crypted}]`)
   return crypted
 } catch (err) {
   logger.warn(`encrypt data[${data}] error`, err)
   return null
 }
}

/**
 * @param {string:require} data 要解密的字符串
 * @return {string} 解密后的字符串
 */
export const decrypt = (data) => {
  try {
    const iv = new Buffer(16)
    // 用aes-256-cbc算法生成decipher实例
    const decipher = crypto.createDecipheriv('aes-256-cbc', securityKey, iv)
    // update待解密内容到decipher实例
    let decoded = decipher.update(data, 'hex', 'utf8')
    // 通过final方法输出解密串
    decoded += decipher.final('utf8')
    logger.info(`decrypt data[${data}] to decoded[${decoded}]`)
    return decoded
  } catch (err) {
    logger.warn(`decrypt data[${data}] error`, err)
    return null
  }
}

常用的加密算法：
base64
aes-256-cbc: 108
blowfish: 96
rc4:92