jsencrypt加密
在登录时，前台页面的用户名、密码都是明文传输到后台的，漏洞扫描认为这样子不安全，就想到了前台js加密，后台解密的方法，要用到jsencrypt.js，具体代码如下：
前台页面：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
<script src="Scripts/jsencrypt.min.js" type="text/javascript"></script>
<script type="text/javascript">
function subData() {
var encrypt = new JSEncrypt();
var publicKey = $("#pubkey").val();
encrypt.setPublicKey(publicKey); var userdata = {};
userdata.Username = encodeURI(encrypt.encrypt($("#tUsername").val()));
userdata.Password = encodeURI(encrypt.encrypt($("#tPassword").val())); $.post("Handler1.ashx", userdata, function (r) {
alert(r);
});
}
</script>
</head>
<body>
用户名：<input type="text" id="tUsername" /><br />
密码：<input type="password" id="tPassword" /><br />
<input type="button" onclick="subData()" value="登录" />
<textarea id="pubkey" rows="15" cols="65" style="display:none">
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDZpm0555ciZabX/1uVDI07cJUI
66mcK2yf5FDB+KOKUrFyWY/xYS8csRDSN1vDfNnmdN45vGr+IMrEeZVqri/tvEL6
3N1JEWlKkvXolLpA6DHc/OKjXR9oQ93MDpftswOSdD5tQxplEDDemBeY2/Qh3RTB
MGKsFuPoYKRxSQP7xwIDAQAB
</textarea>
</body>
</html>
后台处理程序：
using System;
using System.Collections.Generic;
using System.Web;
using System.Security.Cryptography;
using System.Text;
using System.IO; namespace WebApplication1
{
/// <summary>
/// Handler1 的摘要说明
/// </summary>
public class Handler1 : IHttpHandler
{
private const string privateKey = @"MIICXwIBAAKBgQDZpm0555ciZabX/1uVDI07cJUI66mcK2yf5FDB+KOKUrFyWY/x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"; private const string publicKey = @"MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDZpm0555ciZabX/1uVDI07cJUI
66mcK2yf5FDB+KOKUrFyWY/xYS8csRDSN1vDfNnmdN45vGr+IMrEeZVqri/tvEL6
3N1JEWlKkvXolLpA6DHc/OKjXR9oQ93MDpftswOSdD5tQxplEDDemBeY2/Qh3RTB
MGKsFuPoYKRxSQP7xwIDAQAB"; public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
string Username = context.Request["Username"];
string Password = context.Request["Password"]; //解密
RSACryptoService rsa = new RSACryptoService(privateKey, publicKey); Username = rsa.Decrypt(Username);
Password = rsa.Decrypt(Password); context.Response.Write("ok");
} public bool IsReusable
{
get
{
return false;
}
}
} /// <summary>
/// RSA类
/// </summary>
public class RSACryptoService
{
private RSACryptoServiceProvider _privateKeyRsaProvider;
private RSACryptoServiceProvider _publicKeyRsaProvider; public RSACryptoService(string privateKey, string publicKey = null)
{
if (!string.IsNullOrEmpty(privateKey))
{
_privateKeyRsaProvider = CreateRsaProviderFromPrivateKey(privateKey);
} if (!string.IsNullOrEmpty(publicKey))
{
_publicKeyRsaProvider = CreateRsaProviderFromPublicKey(publicKey);
}
} public string Decrypt(string cipherText)
{
if (_privateKeyRsaProvider == null)
{
throw new Exception("_privateKeyRsaProvider is null");
}
return Encoding.UTF8.GetString(_privateKeyRsaProvider.Decrypt(System.Convert.FromBase64String(cipherText), false));
} public string Encrypt(string text)
{
if (_publicKeyRsaProvider == null)
{
throw new Exception("_publicKeyRsaProvider is null");
}
return Convert.ToBase64String(_publicKeyRsaProvider.Encrypt(Encoding.UTF8.GetBytes(text), false));
} 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;
}
}
}
效果如下：
加密后的数据：
后台解密：
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