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