/// 数据
/// </summary>
public byte[] Data { get; set; }
/// <summary>
/// 公钥
/// </summary>
public string PublicKey { get; set; }
/// <summary>
/// 私钥
/// </summary>
public string PrivateKey { get; set; }
/// <summary>
/// 获取密钥
/// </summary>
/// <param name="privateKey">私钥</param>
/// <param name="publicKey">公钥</param>
public static void GetKey(out string privateKey, out string publicKey)
{
SM2 sm2 = SM2.Instance;
AsymmetricCipherKeyPair key = sm2.EccKeyPairGenerator.GenerateKeyPair();
ECPrivateKeyParameters ecpriv = (ECPrivateKeyParameters)key.Private;
ECPublicKeyParameters ecpub = (ECPublicKeyParameters)key.Public;
publicKey = Encoding.Default.GetString(Hex.Encode(ecpub.Q.GetEncoded())).ToUpper();
privateKey = Encoding.Default.GetString(Hex.Encode(ecpriv.D.ToByteArray())).ToUpper();
}
#region 解密
public object Decrypt(Sm2Crypto entity)
{
var data = https://www.isolves.com/it/cxkf/yy/C/2022-03-29/!string.IsNullOrEmpty(entity.Str) ?
Hex.Decode(entity.Str) :
entity.Data;
return Encoding.Default.GetString(Decrypt(Hex.Decode(entity.PrivateKey), data));
}
/// <summary>
/// 解密
/// </summary>
/// <param name="privateKey"></param>
/// <param name="encryptedData"></param>
/// <returns></returns>
private static byte[] Decrypt(byte[] privateKey, byte[] encryptedData)
{
if (null == privateKey || privateKey.Length == 0)
{
return null;
}
if (encryptedData =https://www.isolves.com/it/cxkf/yy/C/2022-03-29/= null || encryptedData.Length == 0)
{
return null;
}
String data = https://www.isolves.com/it/cxkf/yy/C/2022-03-29/Encoding.Default.GetString(Hex.Encode(encryptedData));
byte[] c1Bytes = Hex.Decode(Encoding.Default.GetBytes(data.Substring(0, 130)));
int c2Len = encryptedData.Length - 97;
byte[] c2 = Hex.Decode(Encoding.Default.GetBytes(data.Substring(130, 2 * c2Len)));
byte[] c3 = Hex.Decode(Encoding.Default.GetBytes(data.Substring(130 + 2 * c2Len, 64)));
SM2 sm2 = SM2.Instance;
BigInteger userD = new BigInteger(1, privateKey);
ECPoint c1 = sm2.EccCurve.DecodePoint(c1Bytes);
//c1.Normalize();
Cipher cipher = new Cipher();
cipher.InitDec(userD, c1);
cipher.Decrypt(c2);
cipher.Dofinal(c3);
return c2;
}
#endregion
#region 加密
public string Encrypt(Sm2Crypto entity)
{
var data = https://www.isolves.com/it/cxkf/yy/C/2022-03-29/!string.IsNullOrEmpty(entity.Str) ?
Encoding.Default.GetBytes(entity.Str) :
entity.Data;
return Encrypt(Hex.Decode(entity.PublicKey), data);
}
/// <summary>
/// 加密
/// </summary>
/// <param name="publicKey"></param>
/// <param name="data"></param>
/// <returns></returns>
private static string Encrypt(byte[] publicKey, byte[] data)
{
if (null == publicKey || publicKey.Length == 0)
{
return null;
}
if (data =https://www.isolves.com/it/cxkf/yy/C/2022-03-29/= null || data.Length == 0)
{
return null;
}
byte[] source = new byte[data.Length];
Array.Copy(data, 0, source, 0, data.Length);
Cipher cipher = new Cipher();
SM2 sm = SM2.Instance;
ECPoint userKey = sm.EccCurve.DecodePoint(publicKey);
//userKey.Normalize();
ECPoint c1 = cipher.InitEnc(sm, userKey);
cipher.Encrypt(source);
byte[] c3 = new byte[32];
cipher.Dofinal(c3);
String sc1 = Encoding.Default.GetString(Hex.Encode(c1.GetEncoded()));
String sc2 = Encoding.Default.GetString(Hex.Encode(source));
String sc3 = Encoding.Default.GetString(Hex.Encode(c3));
return (sc1 + sc2 + sc3).ToUpper();
}
#endregion
}
}
4.最终调用结果
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文章插图
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【C# 实现SM2国密加密帮助类】
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