nodejs封装加解密公共方法

nodejs封装加解密方法

使用nodejs开发服务器端应用的时候，加解密方法实现。

公共方法定义文件 encrypt.js

const crypto = require('crypto'); var algorithm = { ecb:'des-ecb',cbc:'des-cbc' }; function cipherivEncrypt(data, key, iv) { var key = new Buffer(key); var iv = new Buffer(iv ? iv : 0); const cipheriv = crypto.createCipheriv(algorithm.ecb, key, iv) let encrypted = cipheriv.update(data, 'utf8', 'hex'); encrypted += cipheriv.final('hex'); return encrypted; } function cipherivDecrypt(data, key, iv){ var key = new Buffer(key); var iv = new Buffer(iv ? iv : 0); const decipher = crypto.createDecipheriv(algorithm.ecb, key, iv); decipher.setAutoPadding(true); var txt = decipher.update(data, 'hex', 'utf8'); txt += decipher.final('utf8'); return txt; } function getKey(key){ key = stringToByte(key) var arrB = new Array(0,0,0,0,0,0,0,0,); for (var i = 0; (i < key.length) && (i < arrB.length); ++i) { arrB[i] = key[i]; } arrB.length=8; return arrB; }; function stringToByte(str) { var bytes = new Array(); var len, c; len = str.length; for(var i = 0; i < len; i++) { c = str.charCodeAt(i); if(c >= 0x010000 && c <= 0x10FFFF) { bytes.push(((c >> 18) & 0x07) | 0xF0); bytes.push(((c >> 12) & 0x3F) | 0x80); bytes.push(((c >> 6) & 0x3F) | 0x80); bytes.push((c & 0x3F) | 0x80); } else if(c >= 0x000800 && c <= 0x00FFFF) { bytes.push(((c >> 12) & 0x0F) | 0xE0); bytes.push(((c >> 6) & 0x3F) | 0x80); bytes.push((c & 0x3F) | 0x80); } else if(c >= 0x000080 && c <= 0x0007FF) { bytes.push(((c >> 6) & 0x1F) | 0xC0); bytes.push((c & 0x3F) | 0x80); } else { bytes.push(c & 0xFF); } } return bytes; } var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; var base64DecodeChars = new Array( -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1); //base64加密 function base64encode(str) { var out, i, len; var c1, c2, c3; len = str.length; i = 0; out = ""; while(i < len) { c1 = str.charCodeAt(i++) & 0xff; if(i == len) { out += base64EncodeChars.charAt(c1 >> 2); out += base64EncodeChars.charAt((c1 & 0x3) << 4); out += "=="; break; } c2 = str.charCodeAt(i++); if(i == len){ out += base64EncodeChars.charAt(c1 >> 2); out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4)); out += base64EncodeChars.charAt((c2 & 0xF) << 2); out += "="; break; } c3 = str.charCodeAt(i++); out += base64EncodeChars.charAt(c1 >> 2); out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4)); out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6)); out += base64EncodeChars.charAt(c3 & 0x3F); } return out; } //base64解密 function base64decode(str) { var c1, c2, c3, c4; var i, len, out; len = str.length; i = 0; out = ""; while(i < len) { do { c1 = base64DecodeChars[str.charCodeAt(i++) & 0xff]; } while(i < len && c1 == -1); if(c1 == -1) break; do { c2 = base64DecodeChars[str.charCodeAt(i++) & 0xff]; } while(i < len && c2 == -1); if(c2 == -1) break; out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4)); do { c3 = str.charCodeAt(i++) & 0xff; if(c3 == 61) return out; c3 = base64DecodeChars[c3]; } while(i < len && c3 == -1); if(c3 == -1) break; out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2)); do { c4 = str.charCodeAt(i++) & 0xff; if(c4 == 61) return out; c4 = base64DecodeChars[c4]; } while(i < len && c4 == -1); if(c4 == -1) break; out += String.fromCharCode(((c3 & 0x03) << 6) | c4); } return out; } module.exports = {'base64encode':base64encode, 'base64decode':base64decode, 'cipherivEncrypt':cipherivEncrypt, 'cipherivDecrypt':cipherivDecrypt, 'getKey':getKey};

加解密方法调用示例 test.js

const express = require('express'); const router = express.Router(); const encrypt = require('../xxx/encrypt');//适当的路径引入encrypt.js //base64加密调用示例 解密调用示例 router.get('/testbase64',function(req,res,next){ console.log(encrypt); var str = '23030219790511475210'; var str2 = encrypt.base64encode(str); var str3 = encrypt.base64decode(str2); res.send({"base64Before":str,"base64encode":str2,"base64decode":str3}); }) //des根据密钥进行加解密 router.get('/testdes',function(req, res,next){ var str="activeCustId=123456&loginNo=aahexx&extraTime=12345678"; str=encodeURI(str); var key="1234adcdef"; key= encrypt.getKey(key); var encrypted = encrypt.cipherivEncrypt(str, key); //解密 var key2=="1234adcdef"; key2= encrypt.getKey(key2); var decrypted = encrypt.cipherivDecrypt(encrypted, key2); res.send({"desBefore":str,"desEncrypt":encrypted,"desDecrypt":decrypted}); });