nodejs中各种加密算法的实现详解

/**
 * @description 
 * 对称加密
 * @param {*} data 加密数据
 * @param {*} algorithm 加密算法
 * @param {*} key 密钥
 * @param {*} iv 向量
 * @returns
 */
function cipherivEncrypt(data, algorithm, key, iv) {
 const cipheriv = crypto.createCipheriv(algorithm, key, iv)
 let encrypted = cipheriv.update(data, 'utf8', 'hex');
 encrypted  = cipheriv.final('hex');
 return encrypted
}

/**
 * @description
 * 对称解密
 * @param {*} data 解密数据
 * @param {*} algorithm 解密算法
 * @param {*} key 密钥
 * @param {*} iv 向量
 * @returns
 */
function cipherivDecrypt(data, algorithm, key, iv) {
 const decipher = crypto.createDecipheriv(algorithm, key, iv);
 let decrypted = decipher.update(data, 'hex', 'utf8');
 decrypted  = decipher.final('utf8');
 return decrypted
}

// AES对称加解密
const str = 'xiaoliye';
const key = 'aaaaaaaaaaaaaaaaaaaaaaaa'; // 24
const iv = 'aaaaaaaaaaaaaaaaaaaaaaaa'; // 24
const cipherAesText = cipherivEncrypt(str, 'aes-192-cfb', key,iv)
const resultText = cipherivDecrypt(cipherAesText, 'aes-192-cfb', key,iv)
console.log(resultText === str) // true

// DES对称加解密
const str = 'xiaoliye';
const key = 'aaaaaaaa'; //8
const iv = 'aaaaaaaa'; //8
const cipherAesText = cipherivEncrypt(str, 'des-cfb', key,iv)
const resultText = cipherivDecrypt(cipherAesText, 'des-cfb', key,iv)
console.log(resultText === str) / true

const constants = require('constants')
const crypto = require('crypto')

/**
 * @description
 * 公钥加密数据
 * @param {*} data 待加密数据
 * @param {*} publicKey 公钥
 * @param {*} inputEncoding 加密数据类型
 * @param {*} outputEncoding 输出的数据类型
 * @param {*} padding 填充方式
 * @returns
 */
function publicEncrypt(data, publicKey, inputEncoding, outputEncoding, padding) {
 const encryptText = crypto.publicEncrypt({
  key: publicKey,
  padding: padding || constants.RSA_PKCS1_PADDING
 }, Buffer.from(data, inputEncoding));

 return encryptText.toString(outputEncoding);
}

/**
 * @description
 * 公钥解密数据
 * @param {*} data 待解密数据
 * @param {*} publicKey 公钥
 * @param {*} inputEncoding 解密数据类型
 * @param {*} outputEncoding 输出的数据类型
 * @param {*} padding 填充方式
 * @returns
 */
function publicDecrypt(data, publicKey, inputEncoding, outputEncoding, padding) {
 let decryptText = '';
 const decryptText = crypto.publicDecrypt({
  key: publicKey,
  padding: padding || constants.RSA_PKCS1_PADDING
 }, Buffer.from(data, inputEncoding));

 return decryptText.toString(outputEncoding);
}

/**
 * @description
 * 私钥加密数据
 * @param {*} data 待加密数据
 * @param {*} privateKey 私钥
 * @param {*} inputEncoding 加密数据类型
 * @param {*} outputEncoding 输出的数据类型
 * @param {*} padding 填充方式
 * @returns
 */
function privateEncrypt(data, privateKey, inputEncoding, outputEncoding, padding) {
 const encryptText = crypto.privateEncrypt({
  key: privateKey,
  padding: padding || constants.RSA_PKCS1_PADDING
 }, Buffer.from(data, inputEncoding));

 return encryptText.toString(outputEncoding);
}

/**
 * @description
 * 私钥解密数据
 * @param {*} data 待解密数据
 * @param {*} privateKey 私钥
 * @param {*} inputEncoding 解密数据类型
 * @param {*} outputEncoding 输出的数据类型
 * @param {*} padding 填充方式
 * @returns
 */
function privateDecrypt(data, privateKey, inputEncoding, outputEncoding, padding) {
 const decryptText = crypto.privateDecrypt({
  key: privateKey,
  padding: padding || constants.RSA_PKCS1_PADDING
 }, Buffer.from(data, inputEncoding));
 return decryptText.toString(outputEncoding);
}

const rsaPublicKey = `-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCncWDMXEToSxtGQCmWY2ywl5CQ
tb81PXYZch4v5M8MNUZPpcmf VDXQbuWqqTqV/tY7rLviu/BAkFbX9NiFCapF5lP
siVwSGWJQwq0S/  RCwB6yFVEzOKL25jANRBVNwmSOzojveCStYPcEs5Q829ld68
9TzluDDqUS69dTHGkQIDAQAB
-----END PUBLIC KEY-----`

const rsaPrivateKey = `-----BEGIN PRIVATE KEY-----
MIICdwIBADANBgkqhkiG9w0BAQEFAASCAmEwggJdAgEAAoGBAKdxYMxcROhLG0ZA
KZZjbLCXkJC1vzU9dhlyHi/kzww1Rk lyZ/5UNdBu5aqpOpX 1jusu K78ECQVtf
02IUJqkXmU yJXBIZYlDCrRL/75ELAHrIVUTM4ovbmMA1EFU3CZI7OiO94JK1g9w
SzlDzb2V3rz1POW4MOpRLr11McaRAgMBAAECgYEAhNa8/cQh4sxbKgOTOr1MKFlG
Fpgpxroo7I0Nh9 Vp1DIpD2Z1PF9ghijEyf0R/pe7LIKgWIPTWdVpIFEeSYVeH43
FLr3zwR9oXzwG7RQTSN4d/Xcvg 24ZxCrvDfn7qDIlXh0jOS0wCvna1or7xgPcOu
XG8J3BNbBdUixM0lk0ECQQDR4SCelWn0BY21jsFobX pGqKOsj tuvU4Cz47Gmev
qvq2suYXwLemkP7EqRu8iNso/IzvrdsuJDG76dzwC4D5AkEAzDz2cDrKOVmqYw7s
luOQFHl1TzmY7Umpd9YbZ5iXn0eCjIn1/e1risRF5 IeSpB84OVltUzj4cVDCbFd
9S1wWQJAIeKcFp5 9cPzxi1fMpIDO3Uua6WBvHXj44GFMZuow byBY9KsOkPfZgJ
Wg0Hil/6KlrkEkpaic ULAetASCKWQJAdMh/Gdlj/LsaxJ2qBvWEU1DIFU8X9Mbk
ElPpQ6lrOXaIXZgdgt8ZWTW1y0vuijBoV6iUKcEXpOdI1 gFk8YxsQJBAJsGJClf
E1mE6CZgegM82428g4osZznVXBO/QtrQsA78S1xo8bo4qwVm0jQBcto65gwlfeeB
Xm7MiIvNVBqzTVs=
-----END PRIVATE KEY-----
`

const str = 'xiaoliye'
const cipherText = publicEncrypt(str, rsaPublicKey, 'utf8', 'hex') // 公钥加密
const decryptText = privateDecrypt(cipherText, rsaPrivateKey, 'hex', 'utf8') // 私钥解密
console.log(str === decryptText) // true

const cipherTextPrivate = privateEncrypt(str,rsaPrivateKey,'utf8', 'hex') // 私钥加密
const decryptTextPublic = publicDecrypt(cipherTextPrivate,rsaPublicKey, 'hex', 'utf8') // 公钥解密
console.log(str === decryptTextPublic) // true

/**
 * @description
 * md5
 * @param {*} data
 * @returns
 */
function md5(data){
 const hash = crypto.createHash('md5');
 return hash.update(data).digest('hex');
}

/**
 * @description
 * sha256
 * @param {*} data
 * @returns
 */
function sha256(data){
 const hash = crypto.createHash('sha256');
 return hash.update(data).digest('hex');
}

console.log(md5('asdf')) // 912ec803b2ce49e4a541068d495ab570
console.log(sha256('asdf')) // f0e4c2f76c58916ec258f246851bea091d14d4247a2fc3e18694461b1816e13b