兼容javascript和C#的RSA加密解密算法,对web提交的数据进行加密传输
Web应用中往往涉及到敏感的数据,由于HTTP协议以明文的形式与服务器进行交互,因此可以通过截获请求的数据包进行分析来盗取有用的信息。虽然https可以对传输的数据进行加密,但是必须要申请证书(一般都是收费的),成本较高。那么问题来了,如果对web提交的敏感数据进行加密呢?web应用中,前端的数据处理和交互基本上都是靠javascript来完成,后台的逻辑处理可以C#(java)等进行处理。
微软的C#中虽然有RSA算法,但是格式和OpenSSL生成的公钥/私钥文件格式并不兼容。这个也给贯通前后台的RSA加密解密带来了难度。为了兼容OpenSSL生成的公钥/私钥文件格式,贯通javascript和C#的RSA加密解密算法,必须对C#内置的方法进行再度封装。
下面以登录为例,用户在密码框输入密码后,javascript发送ajax请求时,对密码先进行rsa加密后再发送,服务器接收到加密后的密码后,先对其进行解密, 然后再验证登录是否成功。
1 为了进行RSA加密解密,首先需要用openssl生成一对公钥和私钥(没有的先下载openssl):
1) 打开openssl.exe文件,输入 genrsa -out openssl_rsa_priv.pem 1024
此命令在openssl.exe同目录下生成openssl_rsa_private_key.pem文件。
2) 生成公钥 rsa -in openssl_rsa__private.pem -pubout -out openssl_rsa__public.pem
以上命令会创建如下的文件:
这个文件可以用文本编辑器进行打开,查看内容。
-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC0w036ClSD0LvxPROMun0u022R
OJlZE6P3m+gjq3gpi4n7lo8jhTqMqgccDbVJqnIfMzWS9O3lnlQXWTxJ3B4XJ52F
AcriY5brOXUVgBLx5QMHLLd1gtJnmG4i7r4ytgX7XVKRnojR6zca1YnS0lbGGDF1
CGllB1riNrdksSQP+wIDAQAB
-----END PUBLIC KEY-----
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
2 用jsencrypt对密码进行加密:
首先需要导入js包文件
<script src="dist/js/jsencrypt.js"></script>
var encrypt = new JSEncrypt();
var pubkey = "-----BEGIN PUBLIC KEY----- \
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDAj0dPnBMf3Z4VT1B8Ee6bjKNs \
hlYj7xvGijAa8RCdmGR7mrtrExnk8mdUlwdcS05gc4SSFOyWJcYtKUHpWn8/pkS0 \
vgGOl9Bzn0Xt9hiqTb3pZAfykNrMDGZMgJgfD6KTnfzVUAOupvxjcGkcoj6/vV5I \
eMcx8mT/z3elfsDSjQIDAQAB \
-----END PUBLIC KEY-----";
encrypt.setPublicKey(pubkey);
var encrypted = encrypt.encrypt($('#txtpwd').val());
//console.log(encrypted);
$.ajax({
type: "POST",
url: "http://localhost:24830/services/rsa_pem.ashx",
data: { "pwd": encrypted },
dataType: "Json",
error: function (xhr, status, error) {
// alert(error);
$("#txtInfo").text(' 请求服务器失败!');
$(that).text('登 录');
$(that).attr('disabled', false);
},
success: function (json) { if (uid == "admin" && json.data=="000") {
window.location.href = "index.html";
}
else {
$("#txtInfo").text(' 用户名或者密码错误!');
$(that).text('登 录');
$(that).attr('disabled', false);
}
}
});
3 后台用C#进行解密
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks; namespace CMCloud.SaaS
{
public class RSACryptoService
{
private RSACryptoServiceProvider _privateKeyRsaProvider;
private RSACryptoServiceProvider _publicKeyRsaProvider; /// <summary>
/// RSA解密
/// </summary>
/// <param name="cipherText"></param>
/// <returns></returns>
public string Decrypt(string cipherText)
{
if (_privateKeyRsaProvider == null)
{
throw new Exception("_privateKeyRsaProvider is null");
}
return Decrypt2(cipherText);
}
/// <summary>
/// RSA加密
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public string Encrypt(string text)
{
if (_publicKeyRsaProvider == null)
{
throw new Exception("_publicKeyRsaProvider is null");
}
return Encrypt2(text);
//return Convert.ToBase64String(_publicKeyRsaProvider.Encrypt(Encoding.UTF8.GetBytes(text), false)); }
private string Encrypt2(string text)
{ Byte[] PlaintextData = Encoding.UTF8.GetBytes(text);
int MaxBlockSize = _publicKeyRsaProvider.KeySize / - ;//加密块最大长度限制 if (PlaintextData.Length <= MaxBlockSize)
{
return Convert.ToBase64String(_publicKeyRsaProvider.Encrypt(PlaintextData, false));
}
else
{
using (MemoryStream PlaiStream = new MemoryStream(PlaintextData))
using (MemoryStream CrypStream = new MemoryStream())
{
Byte[] Buffer = new Byte[MaxBlockSize];
int BlockSize = PlaiStream.Read(Buffer, , MaxBlockSize); while (BlockSize > )
{
Byte[] ToEncrypt = new Byte[BlockSize];
Array.Copy(Buffer, , ToEncrypt, , BlockSize); Byte[] Cryptograph = _publicKeyRsaProvider.Encrypt(ToEncrypt, false);
CrypStream.Write(Cryptograph, , Cryptograph.Length); BlockSize = PlaiStream.Read(Buffer, , MaxBlockSize);
} return Convert.ToBase64String(CrypStream.ToArray(), Base64FormattingOptions.None);
}
} } private string Decrypt2(string ciphertext)
{ Byte[] CiphertextData = Convert.FromBase64String(ciphertext);
int MaxBlockSize = _privateKeyRsaProvider.KeySize / ; //解密块最大长度限制 if (CiphertextData.Length <= MaxBlockSize)
return System.Text.Encoding.UTF8.GetString(_privateKeyRsaProvider.Decrypt(CiphertextData, false)); using (MemoryStream CrypStream = new MemoryStream(CiphertextData))
using (MemoryStream PlaiStream = new MemoryStream())
{
Byte[] Buffer = new Byte[MaxBlockSize];
int BlockSize = CrypStream.Read(Buffer, , MaxBlockSize); while (BlockSize > )
{
Byte[] ToDecrypt = new Byte[BlockSize];
Array.Copy(Buffer, , ToDecrypt, , BlockSize); Byte[] Plaintext = _privateKeyRsaProvider.Decrypt(ToDecrypt, false);
PlaiStream.Write(Plaintext, , Plaintext.Length); BlockSize = CrypStream.Read(Buffer, , MaxBlockSize);
} return System.Text.Encoding.UTF8.GetString(PlaiStream.ToArray());
}
}
public RSACryptoService(string privateKey, string publicKey = null)
{
if (!string.IsNullOrEmpty(privateKey))
{
_privateKeyRsaProvider = CreateRsaProviderFromPrivateKey(privateKey);
} if (!string.IsNullOrEmpty(publicKey))
{
_publicKeyRsaProvider = CreateRsaProviderFromPublicKey(publicKey);
}
} private RSACryptoServiceProvider CreateRsaProviderFromPrivateKey(string privateKey)
{
var privateKeyBits = System.Convert.FromBase64String(privateKey); var RSA = new RSACryptoServiceProvider();
var RSAparams = new RSAParameters(); using (BinaryReader binr = new BinaryReader(new MemoryStream(privateKeyBits)))
{
byte bt = ;
ushort twobytes = ;
twobytes = binr.ReadUInt16();
if (twobytes == 0x8130)
binr.ReadByte();
else if (twobytes == 0x8230)
binr.ReadInt16();
else
throw new Exception("Unexpected value read binr.ReadUInt16()"); twobytes = binr.ReadUInt16();
if (twobytes != 0x0102)
throw new Exception("Unexpected version"); bt = binr.ReadByte();
if (bt != 0x00)
throw new Exception("Unexpected value read binr.ReadByte()"); RSAparams.Modulus = binr.ReadBytes(GetIntegerSize(binr));
RSAparams.Exponent = binr.ReadBytes(GetIntegerSize(binr));
RSAparams.D = binr.ReadBytes(GetIntegerSize(binr));
RSAparams.P = binr.ReadBytes(GetIntegerSize(binr));
RSAparams.Q = binr.ReadBytes(GetIntegerSize(binr));
RSAparams.DP = binr.ReadBytes(GetIntegerSize(binr));
RSAparams.DQ = binr.ReadBytes(GetIntegerSize(binr));
RSAparams.InverseQ = binr.ReadBytes(GetIntegerSize(binr));
} RSA.ImportParameters(RSAparams);
return RSA;
} private int GetIntegerSize(BinaryReader binr)
{
byte bt = ;
byte lowbyte = 0x00;
byte highbyte = 0x00;
int count = ;
bt = binr.ReadByte();
if (bt != 0x02)
return ;
bt = binr.ReadByte(); if (bt == 0x81)
count = binr.ReadByte();
else
if (bt == 0x82)
{
highbyte = binr.ReadByte();
lowbyte = binr.ReadByte();
byte[] modint = { lowbyte, highbyte, 0x00, 0x00 };
count = BitConverter.ToInt32(modint, );
}
else
{
count = bt;
} while (binr.ReadByte() == 0x00)
{
count -= ;
}
binr.BaseStream.Seek(-, SeekOrigin.Current);
return count;
} private RSACryptoServiceProvider CreateRsaProviderFromPublicKey(string publicKeyString)
{
// encoded OID sequence for PKCS #1 rsaEncryption szOID_RSA_RSA = "1.2.840.113549.1.1.1"
byte[] SeqOID = { 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x05, 0x00 };
byte[] x509key;
byte[] seq = new byte[];
int x509size; x509key = Convert.FromBase64String(publicKeyString);
x509size = x509key.Length; // --------- Set up stream to read the asn.1 encoded SubjectPublicKeyInfo blob ------
using (MemoryStream mem = new MemoryStream(x509key))
{
using (BinaryReader binr = new BinaryReader(mem)) //wrap Memory Stream with BinaryReader for easy reading
{
byte bt = ;
ushort twobytes = ; twobytes = binr.ReadUInt16();
if (twobytes == 0x8130) //data read as little endian order (actual data order for Sequence is 30 81)
binr.ReadByte(); //advance 1 byte
else if (twobytes == 0x8230)
binr.ReadInt16(); //advance 2 bytes
else
return null; seq = binr.ReadBytes(); //read the Sequence OID
if (!CompareBytearrays(seq, SeqOID)) //make sure Sequence for OID is correct
return null; twobytes = binr.ReadUInt16();
if (twobytes == 0x8103) //data read as little endian order (actual data order for Bit String is 03 81)
binr.ReadByte(); //advance 1 byte
else if (twobytes == 0x8203)
binr.ReadInt16(); //advance 2 bytes
else
return null; bt = binr.ReadByte();
if (bt != 0x00) //expect null byte next
return null; twobytes = binr.ReadUInt16();
if (twobytes == 0x8130) //data read as little endian order (actual data order for Sequence is 30 81)
binr.ReadByte(); //advance 1 byte
else if (twobytes == 0x8230)
binr.ReadInt16(); //advance 2 bytes
else
return null; twobytes = binr.ReadUInt16();
byte lowbyte = 0x00;
byte highbyte = 0x00; if (twobytes == 0x8102) //data read as little endian order (actual data order for Integer is 02 81)
lowbyte = binr.ReadByte(); // read next bytes which is bytes in modulus
else if (twobytes == 0x8202)
{
highbyte = binr.ReadByte(); //advance 2 bytes
lowbyte = binr.ReadByte();
}
else
return null;
byte[] modint = { lowbyte, highbyte, 0x00, 0x00 }; //reverse byte order since asn.1 key uses big endian order
int modsize = BitConverter.ToInt32(modint, ); int firstbyte = binr.PeekChar();
if (firstbyte == 0x00)
{ //if first byte (highest order) of modulus is zero, don't include it
binr.ReadByte(); //skip this null byte
modsize -= ; //reduce modulus buffer size by 1
} byte[] modulus = binr.ReadBytes(modsize); //read the modulus bytes if (binr.ReadByte() != 0x02) //expect an Integer for the exponent data
return null;
int expbytes = (int)binr.ReadByte(); // should only need one byte for actual exponent data (for all useful values)
byte[] exponent = binr.ReadBytes(expbytes); // ------- create RSACryptoServiceProvider instance and initialize with public key -----
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSAParameters RSAKeyInfo = new RSAParameters();
RSAKeyInfo.Modulus = modulus;
RSAKeyInfo.Exponent = exponent;
RSA.ImportParameters(RSAKeyInfo); return RSA;
} }
} private bool CompareBytearrays(byte[] a, byte[] b)
{
if (a.Length != b.Length)
return false;
int i = ;
foreach (byte c in a)
{
if (c != b[i])
return false;
i++;
}
return true;
}
}
}
虽然将公钥暴露在js文件中,但是如果需要解密得到明文,必须需要私钥(这个存储在后台,不容易获取)。
调试运行,可以看到获取的密码是加密后的数据,然后在后台可以进行解密获取到明文。
兼容javascript和C#的RSA加密解密算法,对web提交的数据进行加密传输的更多相关文章
- 介绍三种PHP加密解密算法
PHP加密解密算法 这里主要介绍三种常用的加密解密算法:方法一: /** * @param $string 要加密/解密的字符串 * @param string $operation 类型,ENCOD ...
- RSA加密解密算法
/** * RSA加密解密算法 * Class Rsa */ class Rsa { /** * 获取pem格式的公钥 * @param $public_key 公钥文件路径或者字符串 * @retu ...
- 数据的加密传输——单片机上实现TEA加密解密算法
各位大侠在做数据传输时,有没有考虑过把数据加密起来进行传输,若在串口或者无线中把所要传的数据加密起来,岂不是增加了通信的安全性.常用的加密解密算法比如DES.RSA等,受限于单片机的内存和运算速度,实 ...
- JAVA常用加密解密算法Encryption and decryption
加密,是以某种特殊的算法改变原有的信息数据,使得未授权的用户即使获得了已加密的信息,但因不知解密的方法,仍然无法了解信息的内容.大体上分为双向加密和单向加密,而双向加密又分为对称加密和非对称加密(有些 ...
- 一组PHP可逆加密解密算法
对于大部分密码加密,我们可以采用md5.sha1等方法.可以有效防止数据泄露,但是这些方法仅适用于无需还原的数据加密. 对于需要还原的信息,则需要采用可逆的加密解密算法. 下面一组PHP函数是实现此加 ...
- RC4加密解密算法
RC4相对是速度快.安全性高的加密算法.在实际应用中,我们可以对安全系数要求高的文本进行多重加密,这样破解就有一定困难了.如下测试给出了先用RC4加密,然后再次用BASE64编码,这样双重锁定,保证数 ...
- java 实现 DES加密 解密算法
DES算法的入口参数有三个:Key.Data.Mode.其中Key为8个字节共64位,是DES算法的工作密钥:Data也为8个字节64位,是要被加密或被解密的数据:Mode为DES的工作方式,有两种: ...
- md5加密以及可逆的加密解密算法
md5加密 package gov.mof.fasp2.gcfr.adjustoffset.adjust; import java.security.MessageDigest; public cla ...
- N个整数(数的大小为0-255)的序列,把它们加密为K个整数(数的大小为0-255).再将K个整数顺序随机打乱,使得可以从这乱序的K个整数中解码出原序列。设计加密解密算法,且要求K<=15*N.
N个整数(数的大小为0-255)的序列,把它们加密为K个整数(数的大小为0-255).再将K个整数顺序随机打乱,使得可以从这乱序的K个整数中解码出原序列.设计加密解密算法,且要求K<=15*N. ...
随机推荐
- SAP自定义权限对象
SAP系统自带了很多的权限对象,每一个运行画面都有非常多的权限用到.不过标准的权限对象并不一定适合于用在客户自己开发的程序里面,所以每个ABAPer都应该会自己开发一套权限对象,并引用在程序代码里面. ...
- Vue.js——60分钟browserify项目模板快速入门
概述 在之前的一系列vue.js文章,我们都是用传统模式引用vue.js以及其他的js文件的,这在开发时会产生一些问题. 首先,这限定了我们的开发模式是基于页面的,而不是基于组件的,组件的所有代码都直 ...
- 全面解析ASP.NET MVC模块化架构方案
什么叫架构?揭开架构神秘的面纱,无非就是:分层+模块化.任意复杂的架构,你也会发现架构师也就做了这两件事. 本文将会全面的介绍我们团队在模块化设计方面取得的经验.之所以加了“全面”二字,是因为本文的内 ...
- Ubuntu部署python3.5的开发和运行环境
Ubuntu部署python3.5的开发和运行环境 1 概述 由于最近项目全部由python2.x转向 python3.x(使用目前最新的 python3.5.1) ,之前的云主机的的默认python ...
- ABP(现代ASP.NET样板开发框架)系列之7、ABP Session管理
点这里进入ABP系列文章总目录 基于DDD的现代ASP.NET开发框架--ABP系列之7.ABP Session管理 ABP是“ASP.NET Boilerplate Project (ASP.NET ...
- 【PRINCE2是什么】PRINCE2认证之七大原则(6)
我们先来回顾一下,PRINCE2七大原则分别是持续的业务验证,经验学习,角色与责任,按阶段管理,例外管理,关注产品,剪裁 第六个原则:关注产品 PRINCE2指出,一个成功的项目必须以产品为导向,而不 ...
- JSON.stringify()与JSON.parse()
JSON.stringify()用于把一个对象解析成字符串,如 var student = { age: 23, name: 'wang' } JSON.stringify(student); 结果: ...
- css实现文本溢出显示...
在网页中显示文字内容时,经常会碰到文字内容特别长的情况,那么这个时候为了使网页看起来比较美观和简洁,会对内容进行处理.下面我们就来看一看,如何使用css来对文字溢出部分增加.... 首先来看第一种情况 ...
- .NetCore之EF跳过的坑
我在网上看到很多.netCore的信息,就动手自己写一个例子测试哈,但是想不到其中这么多坑: 1.首先.netCore和EF的安装就不用多说了,网上有很多的讲解可以跟着一步一步的下载和安装,但是需要注 ...
- 设置MYSQL允许用IP访问
mysql>use mysql; mysql>update user set host = '%' where user ='root'; mysql>flush privileg ...