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引用以下两个js文件
<script type="text/javascript" src="https://www.idaobin.com/test/jquery-3.2.1.js"></script> <script type="text/javascript" src="https://www.idaobin.com/test/jsencrypt.min.js"></script>
加密ajax传输的密码字段
$(document).ready(function () {
$("#submit").click(function () {
//公钥
var pubKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCAnNXR7lHTpPH/97QOxIp+UusK9/RH5elvEPv6ssL37xGo8vQHh7CCsOonUWWVdi1iVegi7fRCkWeUVlta61EuX141+eKnZcdJe81NeUZ1h3N77JbzElbhhi8Wln6U27xpfkskKASLhQ4dS9DqoJQN/YUhBaBpER287Wjf3X6WmQIDAQAB";
var encrypt = new JSEncrypt();
encrypt.setPublicKey(pubKey);
var userName = $("#userName").val();
var pwd = $("#userPwd").val();
if (userName == "") {
alert("用户名不能为空");
}
else if (pwd == "") {
alert("密码不能为空");
}
else {
$.ajax({
type: 'Post',
url: 'login.aspx',
data: {
userName: userName,
pwd: encrypt.encrypt(pwd), //加密密码
op: "login"
},
dataType: 'text',
success: function (succ) {
if (succ === "登录成功") {
window.location.href = "/main.aspx";
}
else {
alert("登录失败");
}
}
});
}
});
});
.Net后台加解密类
public class RSACryptoService
{
/// <summary>
/// 私钥
/// </summary>
private const string defaultprivateKey = @"MIICXAIBAAKBgQCAnNXR7lHTpPH/97QOxIp+UusK9/RH5elvEPv6ssL37xGo8vQH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";
/// <summary>
/// 公钥
/// </summary>
private const string defaultpublicKey = @"MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCAnNXR7lHTpPH/97QOxIp+UusK
9/RH5elvEPv6ssL37xGo8vQHh7CCsOonUWWVdi1iVegi7fRCkWeUVlta61EuX141
+eKnZcdJe81NeUZ1h3N77JbzElbhhi8Wln6U27xpfkskKASLhQ4dS9DqoJQN/YUh
BaBpER287Wjf3X6WmQIDAQAB";
private RSACryptoServiceProvider _privateKeyRsaProvider;
private RSACryptoServiceProvider _publicKeyRsaProvider;
public RSACryptoService(string privateKey = "", string publicKey = "")
{
if (string.IsNullOrEmpty(privateKey))
{
privateKey = defaultprivateKey;
}
if (string.IsNullOrEmpty(publicKey))
{
publicKey = defaultpublicKey;
}
if (!string.IsNullOrEmpty(privateKey))
{
_privateKeyRsaProvider = CreateRsaProviderFromPrivateKey(privateKey);
}
if (!string.IsNullOrEmpty(publicKey))
{
_publicKeyRsaProvider = CreateRsaProviderFromPublicKey(publicKey);
}
}
/// <summary>
/// 解密
/// </summary>
/// <param name="cipherText"></param>
/// <returns></returns>
public string Decrypt(string cipherText)
{
if (_privateKeyRsaProvider == null)
{
throw new Exception("_privateKeyRsaProvider is null");
}
if (string.IsNullOrEmpty(cipherText))
{
return "";
}
return Encoding.UTF8.GetString(_privateKeyRsaProvider.Decrypt(System.Convert.FromBase64String(cipherText), false));
}
/// <summary>
/// 加密
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
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 = 0;
ushort twobytes = 0;
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 = 0;
byte lowbyte = 0x00;
byte highbyte = 0x00;
int count = 0;
bt = binr.ReadByte();
if (bt != 0x02)
return 0;
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, 0);
}
else
{
count = bt;
}
while (binr.ReadByte() == 0x00)
{
count -= 1;
}
binr.BaseStream.Seek(-1, 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[15];
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 = 0;
ushort twobytes = 0;
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(15); //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, 0);
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 -= 1; //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 = 0;
foreach (byte c in a)
{
if (c != b[i])
return false;
i++;
}
return true;
}
}
调用加解密类
RSACryptoService rsa = new RSACryptoService(); string pwd = rsa.Decrypt(Request["pwd"]); //解密 //string pwd = rsa.Encrypt(Request["pwd"]); //加密
密钥格式：必须为PKCS#1，证书密码：必须为空，否则无法解密
原文链接：https://www.idaobin.com/archives/1948.html
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