public virtual ECPoint Init_enc(SM2CryptoServiceProvider sm2, ECPoint userKey)
{
//BigInteger k = null;
//ECPoint c1 = null;
//AsymmetricCipherKeyPair key = sm2.ecc_key_pair_generator.GenerateKeyPair();
//ECPrivateKeyParameters ecpriv = (ECPrivateKeyParameters)key.Private;
//ECPublicKeyParameters ecpub = (ECPublicKeyParameters)key.Public;
//k = ecpriv.D;
//c1 = ecpub.Q;
//p2 = userKey.Multiply(k);
//Reset();
//return c1;
var keySTR = userKey.GetEncoded().byteToHex();
if (keySTR.Length > 64)
{
keySTR = keySTR.Substring(0, 64);
}
BigInteger k = new BigInteger(keySTR, 16); //ecpriv.getD();
ECPoint c1 = sm2.ecc_point_g.Multiply(k); //ecpub.getQ();
this.p2 = userKey.Multiply(k);
Reset();
return(c1);
}
/// <summary>
/// SM2签名Hard转soft
/// </summary>
/// <param name="hardSign"></param>
/// <returns></returns>
public static String SM2SignHardToSoft(String hardSign)
{
byte[] bytes = hardSign.hexToByte();
byte[] r = new byte[bytes.Length / 2];
byte[] s = new byte[bytes.Length / 2];
System.Array.Copy(bytes, 0, r, 0, bytes.Length / 2);
System.Array.Copy(bytes, bytes.Length / 2, s, 0, bytes.Length / 2);
var d_r = new DerInteger(SM2CryptoServiceProvider.byteConvertInteger(r));
var d_s = new DerInteger(SM2CryptoServiceProvider.byteConvertInteger(s));
var v2 = new Asn1EncodableVector();
v2.Add(d_r);
v2.Add(d_s);
var sign = new DerSequence(v2);
String result = null;
try
{
result = sign.GetEncoded().ByteArrayToHex();
}
catch (IOException e)
{
//e.printStackTrace();
throw (e);
}
//SM2加密机转软加密编码格式
//return SM2SignHardKeyHead+hardSign.substring(0, hardSign.Length()/2)+SM2SignHardKeyMid+hardSign.substring(hardSign.Length()/2);
return(result);
}
public static Dictionary <string, string> GetKeyPair()
{
SM2CryptoServiceProvider sm2 = SM2CryptoServiceProvider.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;
var result = new Dictionary <string, string>();
result.Add("公钥", Encoding.UTF8.GetString(Hex.Encode(publicKey.GetEncoded())).ToUpper());
result.Add("私钥", Encoding.UTF8.GetString(Hex.Encode(privateKey.ToByteArray())).ToUpper());
return(result);
}
public static byte[] Decrypt(byte[] privateKey, byte[] encryptedData)
{
if (null == privateKey || privateKey.Length == 0)
{
return(null);
}
if (encryptedData == null || encryptedData.Length == 0)
{
return(null);
}
//加密字节数组转换为十六进制的字符串 长度变为encryptedData.length * 2
var data = encryptedData.byteToHex();// Encoding.UTF8.GetString(Hex.Encode(encryptedData));
byte[] c1Bytes = data.Substring(0, 130).hexToByte();
int c2Len = encryptedData.Length - 97;
byte[] c2 = data.Substring(130, 2 * c2Len).hexToByte();
byte[] c3 = data.Substring(130 + 2 * c2Len, 64).hexToByte();
//byte[] c1Bytes = Hex.Decode(Encoding.UTF8.GetBytes(data.Substring(0, 130)));
//int c2Len = encryptedData.Length - 97;
//byte[] c2 = Hex.Decode(Encoding.UTF8.GetBytes(data.Substring(130, 2 * c2Len)));
//byte[] c3 = Hex.Decode(Encoding.UTF8.GetBytes(data.Substring(130 + 2 * c2Len, 64)));
SM2CryptoServiceProvider sm2 = SM2CryptoServiceProvider.Instance;
BigInteger userD = new BigInteger(1, privateKey);
ECPoint c1 = sm2.ecc_curve.DecodePoint(c1Bytes);
SM2Cipher cipher = new SM2Cipher();
cipher.Init_dec(userD, c1);
cipher.Decrypt(c2);
cipher.Dofinal(c3);
return(c2);
}
