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C#中RSA加密与解密的实例详解

2019-08-22 09:58 2041 查看

1. RSA加密与解密 -- 使用公钥加密、私钥解密

public class RSATool
{
public string Encrypt(string strText, string strPublicKey)
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.FromXmlString(strPublicKey);
byte[] byteText = Encoding.UTF8.GetBytes(strText);
byte[] byteEntry = rsa.Encrypt(byteText, false);
return Convert.ToBase64String(byteEntry);
}
public string Decrypt(string strEntryText,string strPrivateKey)
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.FromXmlString(strPrivateKey);
byte[] byteEntry = Convert.FromBase64String(strEntryText);
byte[] byteText = rsa.Decrypt(byteEntry, false);
return Encoding.UTF8.GetString(byteText);
}
public Dictionary<string,string> GetKey()
{
Dictionary<string, string> dictKey = new Dictionary<string, string>();
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
dictKey.Add("PublicKey", rsa.ToXmlString(false));
dictKey.Add("PrivateKey", rsa.ToXmlString(true));
return dictKey;
}
}

测试：

RSATool myRSA = new RSATool();
Dictionary<string, string> dictK = new Dictionary<string, string>();
dictK = myRSA.GetKey();
string strText = "123456";
Console.WriteLine("要加密的字符串是：{0}", strText);
string str1 = myRSA.Encrypt("123456", dictK["PublicKey"]);
Console.WriteLine("加密后的字符串：{0}", str1);
string str2 = myRSA.Decrypt(str1, dictK["PrivateKey"]);
Console.WriteLine("解密后的字符串：{0}", str2);

2. RSA加密与解密 -- 使用同一个密钥容器进行加密与解密

public class RSAToolX
{
public string Encrypt(string strText)
{
CspParameters CSApars = new CspParameters();
CSApars.KeyContainerName = "Test001";
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(CSApars);
byte[] byteText = Encoding.UTF8.GetBytes(strText);
byte[] byteEntry = rsa.Encrypt(byteText, false);
return Convert.ToBase64String(byteEntry);
}
public string Decrypt(string strEntryText)
{
CspParameters CSApars = new CspParameters();
CSApars.KeyContainerName = "Test001";
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(CSApars);
byte[] byteEntry = Convert.FromBase64String(strEntryText);
byte[] byteText = rsa.Decrypt(byteEntry, false);
return Encoding.UTF8.GetString(byteText);
}
}

测试：

RSAToolX myRSA = new RSAToolX();
string strText = "123456";
Console.WriteLine("要加密的字符串是：{0}", strText);
string str1 = myRSA.Encrypt("123456");
Console.WriteLine("加密后的字符串：{0}", str1);
string str2 = myRSA.Decrypt(str1);
Console.WriteLine("解密后的字符串：{0}", str2);

总结

以上所述是小编给大家介绍的C#中RSA加密与解密的实例详解，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！

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