如何使用公共和私有密钥加密技术,在C# [英] How to use public and private key encryption technique in C#
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问题描述
欲一个数据,使用公钥/私钥技术进行加密。我的意思是,加密与接收器的公共密钥和接收器可以用自己的私钥解密。
I want to encrypt a data with using public/private key technique. I mean, encrypt with the public key of receiver and the receiver can decrypt with own private key.
我怎样才能做到这一点? ?你有任何建议或示例代码或别的东西。
How can I do that? Do you have any suggestion or sample code or something else?
推荐答案
代码示例:
private static string _privateKey;
private static string _publicKey;
private static UnicodeEncoding _encoder = new UnicodeEncoding();
private static void RSA()
{
var rsa = new RSACryptoServiceProvider();
_privateKey = rsa.ToXmlString(true);
_publicKey = rsa.ToXmlString(false);
var text = "Test1";
Console.WriteLine("RSA // Text to encrypt: " + text);
var enc = Encrypt(text);
Console.WriteLine("RSA // Encrypted Text: " + enc);
var dec = Decrypt(enc);
Console.WriteLine("RSA // Decrypted Text: " + dec);
}
public static string Decrypt(string data)
{
var rsa = new RSACryptoServiceProvider();
var dataArray = data.Split(new char[] { ',' });
byte[] dataByte = new byte[dataArray.Length];
for (int i = 0; i < dataArray.Length; i++)
{
dataByte[i] = Convert.ToByte(dataArray[i]);
}
rsa.FromXmlString(_privateKey);
var decryptedByte = rsa.Decrypt(dataByte, false);
return _encoder.GetString(decryptedByte);
}
public static string Encrypt(string data)
{
var rsa = new RSACryptoServiceProvider();
rsa.FromXmlString(_publicKey);
var dataToEncrypt = _encoder.GetBytes(data);
var encryptedByteArray = rsa.Encrypt(dataToEncrypt, false).ToArray();
var length = encryptedByteArray.Count();
var item = 0;
var sb = new StringBuilder();
foreach (var x in encryptedByteArray)
{
item++;
sb.Append(x);
if (item < length)
sb.Append(",");
}
return sb.ToString();
}
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