node.js 加解密方法实现

1. des 加解密方法

 

//密钥构造器 des

function keyGenerator(key) {

    if (!key) throw new Error('密钥key不能为空');

    if (key.length == 8) return Buffer.from(key, 'utf8');

    if (key.length >= 16) return HexString2Bytes(key.substr(0, 16));

    throw new Error('无效密钥,必须是8位字符或大于等于16位字符');

}

// DES 加密 解密

exports.des = {

    encrypt: function (text, key) {

        let cipher = crypto.createCipheriv("des-ecb", keyGenerator(key), new Buffer(0))

        let encrypt = cipher.update(text, 'utf8', 'base64'

        encrypt += cipher.final('base64')

        return encrypt

    },

    decrypt: function (encrypt, key) {

        let decipher = crypto.createDecipheriv("des-ecb", keyGenerator(key), new Buffer(0))

        let text = decipher.update(encrypt, 'base64', 'utf8')

        text += decipher.final('utf8')

        return text

    }

}

2. aes 加解密方法

//生成加密key aes

exports.create_secret_key = () => {

    return new Buffer(crypto.pseudoRandomBytes(16)).toString('base64')

}

//AES 加密-解密

exports.aes = {

    /**

     * AES 加密

     * @param text 明文

     * @param base64key 秘钥，base64格式

     */

    encrypt: function (text, base64key) {

        let buffer = Buffer.from(base64key, 'base64')

        let cipher = crypto.createCipheriv("aes-128-cbc", buffer, new Buffer(16))

        let encrypt = cipher.update(text, 'utf8', 'base64')

        encrypt += cipher.final('base64')

        return encrypt

    },

    /**

     * AES 解密

     * @param text 密文

     * @param base64key 秘钥，base64格式

     */

    decrypt: function (encrypt, base64key) {

        let buffer = Buffer.from(base64key, 'base64')

        let decipher = crypto.createDecipheriv("aes-128-cbc", buffer, new Buffer(16))

        let text = decipher.update(encrypt, 'base64', 'utf8')

        text += decipher.final('utf8')

        return text

    }

}