using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Math.EC;
using Org.BouncyCastle.Utilities.Encoders;
namespace Admin.NET.Core;
///
/// SM2工具类
///
public class SM2Util
{
///
/// 加密
///
///
///
///
public static string Encrypt(string publicKey_string, string data_string)
{
var publicKey = Hex.Decode(publicKey_string);
var data = Encoding.UTF8.GetBytes(data_string);
return Encrypt(publicKey, data);
}
///
/// 解密
///
///
///
///
public static string Decrypt(string privateKey_string, string encryptedData_string)
{
var privateKey = Hex.Decode(privateKey_string);
var encryptedData = Hex.Decode(encryptedData_string);
var de_str = SM2Util.Decrypt(privateKey, encryptedData);
string plainText = Encoding.UTF8.GetString(de_str);
return plainText;
}
public static void GenerateKeyPair()
{
SM2 sm2 = SM2.Instance;
AsymmetricCipherKeyPair key = sm2.ecc_key_pair_generator.GenerateKeyPair();
ECPrivateKeyParameters ecpriv = (ECPrivateKeyParameters)key.Private;
ECPublicKeyParameters ecpub = (ECPublicKeyParameters)key.Public;
BigInteger privateKey = ecpriv.D;
ECPoint publicKey = ecpub.Q;
Console.Out.WriteLine("公钥: " + Encoding.ASCII.GetString(Hex.Encode(publicKey.GetEncoded())).ToUpper());
Console.Out.WriteLine("私钥: " + Encoding.ASCII.GetString(Hex.Encode(privateKey.ToByteArray())).ToUpper());
}
public static string Encrypt(byte[] publicKey, byte[] data)
{
if (null == publicKey || publicKey.Length == 0)
{
return null;
}
if (data == null || data.Length == 0)
{
return null;
}
byte[] source = new byte[data.Length];
Array.Copy(data, 0, source, 0, data.Length);
var cipher = new Cipher();
SM2 sm2 = SM2.Instance;
ECPoint userKey = sm2.ecc_curve.DecodePoint(publicKey);
ECPoint c1 = cipher.Init_enc(sm2, userKey);
cipher.Encrypt(source);
byte[] c3 = new byte[32];
cipher.Dofinal(c3);
string sc1 = Encoding.ASCII.GetString(Hex.Encode(c1.GetEncoded()));
string sc2 = Encoding.ASCII.GetString(Hex.Encode(source));
string sc3 = Encoding.ASCII.GetString(Hex.Encode(c3));
return (sc1 + sc2 + sc3).ToUpper();
}
public static byte[] Decrypt(byte[] privateKey, byte[] encryptedData)
{
if (null == privateKey || privateKey.Length == 0)
{
return null;
}
if (encryptedData == null || encryptedData.Length == 0)
{
return null;
}
string data = Encoding.ASCII.GetString(Hex.Encode(encryptedData));
byte[] c1Bytes = Hex.Decode(Encoding.ASCII.GetBytes(data.Substring(0, 130)));
int c2Len = encryptedData.Length - 97;
byte[] c2 = Hex.Decode(Encoding.ASCII.GetBytes(data.Substring(130, 2 * c2Len)));
byte[] c3 = Hex.Decode(Encoding.ASCII.GetBytes(data.Substring(130 + 2 * c2Len, 64)));
SM2 sm2 = SM2.Instance;
var userD = new BigInteger(1, privateKey);
ECPoint c1 = sm2.ecc_curve.DecodePoint(c1Bytes);
var cipher = new Cipher();
cipher.Init_dec(userD, c1);
cipher.Decrypt(c2);
cipher.Dofinal(c3);
return c2;
}
//[STAThread]
//public static void Main()
//{
// GenerateKeyPair();
// String plainText = "ererfeiisgod";
// byte[] sourceData = Encoding.Default.GetBytes(plainText);
// //下面的秘钥可以使用generateKeyPair()生成的秘钥内容
// // 国密规范正式私钥
// String prik = "3690655E33D5EA3D9A4AE1A1ADD766FDEA045CDEAA43A9206FB8C430CEFE0D94";
// // 国密规范正式公钥
// String pubk = "04F6E0C3345AE42B51E06BF50B98834988D54EBC7460FE135A48171BC0629EAE205EEDE253A530608178A98F1E19BB737302813BA39ED3FA3C51639D7A20C7391A";
// System.Console.Out.WriteLine("加密: ");
// String cipherText = SM2Utils.Encrypt(Hex.Decode(pubk), sourceData);
// System.Console.Out.WriteLine(cipherText);
// System.Console.Out.WriteLine("解密: ");
// plainText = Encoding.Default.GetString(SM2Utils.Decrypt(Hex.Decode(prik), Hex.Decode(cipherText)));
// System.Console.Out.WriteLine(plainText);
// Console.ReadLine();
//}
///
/// SM2加密
///
/// 明文
/// 密文
public static String 加密(String plainText)
{
// 国密规范正式公钥
String pubk = "04F6E0C3345AE42B51E06BF50B98834988D54EBC7460FE135A48171BC0629EAE205EEDE253A530608178A98F1E19BB737302813BA39ED3FA3C51639D7A20C7391A";
byte[] sourceData = Encoding.Default.GetBytes(plainText);
String cipherText = SM2Util.Encrypt(Hex.Decode(pubk), sourceData);
return cipherText;
}
///
/// SM2解密
///
/// 密文
/// 明文
public static string 解密(String cipherText)
{
// 国密规范正式私钥
String prik = "3690655E33D5EA3D9A4AE1A1ADD766FDEA045CDEAA43A9206FB8C430CEFE0D94";
String plainText = Encoding.Default.GetString(SM2Util.Decrypt(Hex.Decode(prik), Hex.Decode(cipherText)));
return plainText;
}
}