UNIVPLMDataIntegration/Admin.NET/Admin.NET.Core/Utils/CryptogramUtil.cs

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//
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using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Utilities.Encoders;

namespace Admin.NET.Core;

public class CryptogramUtil
{
    public static readonly string CryptoType = App.GetConfig<string>("Cryptogram:CryptoType"); // 加密类型
    public static readonly string PublicKey = App.GetConfig<string>("Cryptogram:PublicKey"); // 公钥
    public static readonly string PrivateKey = App.GetConfig<string>("Cryptogram:PrivateKey"); // 私钥

    public static readonly string SM4_key = "0123456789abcdeffedcba9876543210";
    public static readonly string SM4_iv = "595298c7c6fd271f0402f804c33d3f66";

    /// <summary>
    /// 获取国密公钥私钥对
    /// </summary>
    /// <returns></returns>
    public static SmKeyPairOutput GetSmKeyPair()
    {
        var kp = GM.GenerateKeyPair();
        var privateKey = Hex.ToHexString(((ECPrivateKeyParameters)kp.Private).D.ToByteArray()).ToUpper();
        var publicKey = Hex.ToHexString(((ECPublicKeyParameters)kp.Public).Q.GetEncoded()).ToUpper();

        return new SmKeyPairOutput
        {
            PrivateKey = privateKey,
            PublicKey = publicKey,
        };
    }

    /// <summary>
    /// 加密
    /// </summary>
    /// <param name="plainText"></param>
    /// <returns></returns>
    public static string Encrypt(string plainText)
    {
        if (CryptoType == CryptogramEnum.MD5.ToString())
        {
            return MD5Encryption.Encrypt(plainText);
        }
        else if (CryptoType == CryptogramEnum.SM2.ToString())
        {
            return SM2Encrypt(plainText);
        }
        else if (CryptoType == CryptogramEnum.SM4.ToString())
        {
            return SM4EncryptECB(plainText);
        }
        return plainText;
    }

    /// <summary>
    /// 解密
    /// </summary>
    /// <param name="cipherText"></param>
    /// <returns></returns>
    public static string Decrypt(string cipherText)
    {
        if (CryptoType == CryptogramEnum.SM2.ToString())
        {
            return SM2Decrypt(cipherText);
        }
        else if (CryptoType == CryptogramEnum.SM4.ToString())
        {
            return SM4DecryptECB(cipherText);
        }
        return cipherText;
    }

    /// <summary>
    /// SM2加密
    /// </summary>
    /// <param name="plainText"></param>
    /// <returns></returns>
    public static string SM2Encrypt(string plainText)
    {
        return GMUtil.SM2Encrypt(PublicKey, plainText);
    }

    /// <summary>
    /// SM2解密
    /// </summary>
    /// <param name="cipherText"></param>
    /// <returns></returns>
    public static string SM2Decrypt(string cipherText)
    {
        try
        {
            return GMUtil.SM2Decrypt(PrivateKey, cipherText);
        }
        catch
        {
            throw Oops.Oh(ErrorCodeEnum.D0010);
        }
    }

    /// <summary>
    /// SM4加密（ECB）
    /// </summary>
    /// <param name="plainText"></param>
    /// <returns></returns>
    public static string SM4EncryptECB(string plainText)
    {
        return GMUtil.SM4EncryptECB(SM4_key, plainText);
    }

    /// <summary>
    /// SM4解密（ECB）
    /// </summary>
    /// <param name="cipherText"></param>
    /// <returns></returns>
    public static string SM4DecryptECB(string cipherText)
    {
        return GMUtil.SM4DecryptECB(SM4_key, cipherText);
    }

    /// <summary>
    /// SM4加密（CBC）
    /// </summary>
    /// <param name="plainText"></param>
    /// <returns></returns>
    public static string SM4EncryptCBC(string plainText)
    {
        return GMUtil.SM4EncryptCBC(SM4_key, SM4_iv, plainText);
    }

    /// <summary>
    /// SM4解密（CBC）
    /// </summary>
    /// <param name="cipherText"></param>
    /// <returns></returns>
    public static string SM4DecryptCBC(string cipherText)
    {
        return GMUtil.SM4DecryptCBC(SM4_key, SM4_iv, cipherText);
    }
}