101 lines
3.7 KiB
C#
101 lines
3.7 KiB
C#
using Org.BouncyCastle.Asn1.X9;
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using Org.BouncyCastle.Crypto;
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using Org.BouncyCastle.Crypto.Engines;
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using Org.BouncyCastle.Crypto.Generators;
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using Org.BouncyCastle.Crypto.Parameters;
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using Org.BouncyCastle.Math;
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using Org.BouncyCastle.Security;
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using Org.BouncyCastle.Utilities.Encoders;
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using System.Text;
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namespace XPrint.Production.Business.Tools
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{
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public class SM2Tool
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{
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/// <summary>
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/// 生成 SM2 密钥对，密钥对使用 Base64 进行编码
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/// </summary>
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/// <param name="privateKey"></param>
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/// <param name="publicKey"></param>
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public static void GenerateSM2KeyPair(out string privateKey, out string publicKey)
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{
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// 获取 SM2 曲线参数
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X9ECParameters curve = ECNamedCurveTable.GetByName("sm2p256v1");
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KeyGenerationParameters parameters = new ECKeyGenerationParameters(new ECDomainParameters(curve), new SecureRandom());
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// 创建 SM2 密钥对生成器
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ECKeyPairGenerator generator = new ECKeyPairGenerator();
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generator.Init(parameters);
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// 创建密钥对
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var keyPair = generator.GenerateKeyPair();
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// 私钥
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ECPrivateKeyParameters privateKeyParameters = (ECPrivateKeyParameters)keyPair.Private;
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privateKey = Base64.ToBase64String(privateKeyParameters.D.ToByteArrayUnsigned());
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// 公钥
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ECPublicKeyParameters publicKeyParameters = (ECPublicKeyParameters)keyPair.Public;
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publicKey = Base64.ToBase64String(publicKeyParameters.Q.GetEncoded());
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}
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/// <summary>
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/// SM2 公钥加密
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/// </summary>
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/// <param name="message"></param>
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/// <param name="key"></param>
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/// <returns></returns>
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public static string Encrypt(string message, string key)
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{
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// 获取 SM2 曲线参数
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X9ECParameters curve = ECNamedCurveTable.GetByName("sm2p256v1");
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var q = curve.Curve.DecodePoint(Base64.Decode(key));
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ECDomainParameters domain = new ECDomainParameters(curve);
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ECPublicKeyParameters pubk = new ECPublicKeyParameters("EC", q, domain);
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// 创建SM2加密器
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SM2Engine sm2Engine = new SM2Engine();
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sm2Engine.Init(true, new ParametersWithRandom(pubk, new SecureRandom()));
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// 将原始数据转换为字节数组
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byte[] dataBytes = Encoding.UTF8.GetBytes(message);
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// 执行加密操作
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byte[] encryptedData = sm2Engine.ProcessBlock(dataBytes, 0, dataBytes.Length);
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// 将加密结果转换为 Base64 字符串
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return Base64.ToBase64String(encryptedData);
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}
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/// <summary>
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/// SM2 私钥解密
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/// </summary>
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/// <param name="message"></param>
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/// <param name="key"></param>
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/// <returns></returns>
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public static string Decrypt(string message, string key)
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{
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// 获取 SM2 曲线参数
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X9ECParameters curve = ECNamedCurveTable.GetByName("sm2p256v1");
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ECDomainParameters domain = new ECDomainParameters(curve);
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var d = new BigInteger(1, Base64.Decode(key));
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ECPrivateKeyParameters prik = new ECPrivateKeyParameters(d, domain);
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// 创建SM2加密器
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SM2Engine sm2Engine = new SM2Engine();
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sm2Engine.Init(false, prik);
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byte[] encryptedData = Base64.Decode(message);
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// 执行解密操作
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byte[] decryptedData = sm2Engine.ProcessBlock(encryptedData, 0, encryptedData.Length);
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// 将解密结果转换为字符串
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return Encoding.UTF8.GetString(decryptedData);
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}
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}
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}
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