如何在C#中使用公钥和私钥加密技术
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时间：2020-08-10 12:22:08 来源:igfitidea点击:
How to use public and private key encryption technique in C#
提问by cagin
I want to encrypt data using public/private key technique. I mean, encrypt with the public key of receiver and the receiver can decrypt with their own private key.
我想使用公钥/私钥技术加密数据。我的意思是，用接收者的公钥加密，接收者可以用自己的私钥解密。
How can I do that? Do you have any suggestion or sample code ?
我怎样才能做到这一点？你有什么建议或示例代码吗？
采纳答案by Erwin
Code example:
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();
}
