/// <summary>
/// 签名验证算法
/// 利用签名者的公钥和传过来的r，s来验证签名是否合法
/// </summary>
/// <param name="sm2">sm2对象</param>
/// <param name="ppk">签名者的公钥16进制字符串</param>
/// <param name="Z">签名算法产生的16进制字符串 Z</param>
/// <param name="r">签名算法生成的 R</param>
/// <param name="s">签名算法生成的 S</param>
/// <returns></returns>
public bool Signature_Check(SM2 sm2, string ppk, string Z, string r, string s)
{
ECPoint test_p = null;
//test_p = sm2.userKey;
//MessageBox.Show(ppk);
byte[] key = strToToHexByte(ppk);
test_p = sm2.ecc_curve.DecodePoint(key);
Com.Itrus.Crypto.SM2.SM2Result sm2Ret = new Com.Itrus.Crypto.SM2.SM2Result();//实例化一个SM2Result的对象sm2Ret
SM3Digest sm3 = new SM3Digest();
byte[] z = strToToHexByte(Z);
sm3.BlockUpdate(z, 0, z.Length);
byte[] md = new byte[32];
sm3.DoFinal(md, 0);
sm2Ret.r = new BigInteger(r, 16);
sm2Ret.s = new BigInteger(s, 16);
sm2.Sm2Verify(md, test_p, sm2Ret.r, sm2Ret.s, sm2Ret); //调用Sm2Verify方法，得到R
if (sm2Ret.r.Equals(sm2Ret.R)) //如果r==R
{
return(true); //System.Console.Out.WriteLine("\n签名结果验证通过！r == R\n");
}
else//r!=R
{
return(false);//System.Console.Out.WriteLine("\n签名结果验证失败！r != R\n");
}
}
/// <summary>
/// 公钥加密算法，利用下一个用户的公钥进行加密
/// </summary>
/// <param name="sm2">sm2对象</param>
/// <param name="msg">要加密的消息</param>
/// <param name="ppk">目的签名者的公钥文件夹路径</param>
/// <param name="id">加密后消息存入的文件夹（最好不存起来）</param>
public string[] Test_sm2_cipher(SM2 sm2, string msg, string ppk)
{
byte[] data = Encoding.Default.GetBytes(msg);//将信息转化为比特
// 加密过程
ECPoint userKey = null;
byte[] key = null;
ReadpublicKey(out key, ppk); //读取解密者的公钥
userKey = sm2.ecc_curve.DecodePoint(key); //把字节形的转化为Ecpoint
System.String sdata = new UTF8Encoding().GetString(Hex.Encode(data));
SM2.Cipher cipher = new SM2.Cipher();
ECPoint c1 = cipher.Init_enc(sm2, userKey); //调用Init_enc方法
byte[] bc1 = c1.GetEncoded(); //将c1的数据类型转换成比特串
System.String sbc1 = new UTF8Encoding().GetString(Hex.Encode(bc1));
cipher.Encrypt(data);
System.String sc2 = new UTF8Encoding().GetString(Hex.Encode(data));
byte[] c3 = new byte[32];
cipher.Dofinal(c3);
System.String sc3 = new UTF8Encoding().GetString(Hex.Encode(c3));
string[] cc = { sbc1, sc2, sc3 };
return(cc);
}
/// <summary>
/// 数字签名算法
/// 利用自己的公私钥生成rs并存入文件
/// </summary>
/// <param name="sm2">sm2对象</param>
/// <param name="pripk">自己的私钥文件夹</param>
/// <param name="ppk">自己的公钥文件路径</param>
/// <param name="ida">用户名</param>
public string Test_sm2_sign(SM2 sm2, string pripk, string ppk, string ida)
{
BigInteger test_d = null;
ECPoint test_p = null;
byte[] key = null;
//读取私钥
Readprikey(out test_d, pripk);
//读取公钥
ReadpublicKey(out key, ppk);
test_p = sm2.ecc_curve.DecodePoint(key);
Com.Itrus.Crypto.SM2.SM2Result sm2Ret = new Com.Itrus.Crypto.SM2.SM2Result();//实例化一个SM2Result的对象sm2Ret
SM3Digest sm3 = new SM3Digest();
byte[] z = sm2.Sm2GetZ(Encoding.Default.GetBytes(ida), test_p);//调用Sm2GetZ方法求a的Z的字节数组
sm3.BlockUpdate(z, 0, z.Length);
byte[] md = new byte[32];
sm3.DoFinal(md, 0);
sm2.Sm2Sign(md, test_d, test_p, sm2Ret); //生成rs
Writers(sm2Ret.r, sm2Ret.s, ida + "rs" + ".txt"); //写入rs文件
return(byteToHexStr(z));
}
public static bool VerifySign(string _dataToSign, string _signPack, string _pubKeyX, string _pubKeyY)
{
SM2 sm2 = SM2.Instance;
sm2.cipher_sm = new SM2.Cipher();
string signPack1 = _signPack.Substring(0, 64);
string signPack2 = _signPack.Substring(64, 64);
BigInteger ecc_gx = new BigInteger(_pubKeyX, 16);
BigInteger ecc_gy = new BigInteger(_pubKeyY, 16);
ECFieldElement ecc_gx_fieldElement = sm2.ecc_curve.FromBigInteger(ecc_gx); //选定椭圆曲线上基点 G 的 x 坐标
ECFieldElement ecc_gy_fieldElement = sm2.ecc_curve.FromBigInteger(ecc_gy); //选定椭圆曲线上基点 G 的 y 坐标
ECPoint ecc_point_g = new FpPoint(sm2.ecc_curve, ecc_gx_fieldElement, ecc_gy_fieldElement); //生成基点 G
SM2.SM2Result result = new SM2.SM2Result();
BigInteger gp_br = new BigInteger(signPack1, 16);
BigInteger gp_bs = new BigInteger(signPack2, 16);
result.r = gp_br;
result.s = gp_bs;
sm2.Sm2Verify(HexStringToBytes(_dataToSign), ecc_point_g, gp_br, gp_bs, result);
return(result.R.Equals(result.r));
}
/// <summary>
/// 解密
/// </summary>
/// <param name="privateKey">Base64进制表示的私钥</param>
/// <param name="text">Base64进制表示的密文</param>
/// <returns></returns>
public static string Decrypt(string privateKey, string text)
{
if (null == privateKey || null == text)
{
return(null);
}
byte[] privateKeyByte = Convert.FromBase64String(privateKey);
if (null == privateKeyByte || privateKeyByte.Length == 0)
{
return(null);
}
byte[] encryptedData = Convert.FromBase64String(text);
if (encryptedData == null || encryptedData.Length == 0)
{
return(null);
}
String data = Encoding.ASCII.GetString(Hex.Encode(encryptedData));
//采用C1C2C3模式
//byte[] c1Bytes = Hex.Decode(Encoding.ASCII.GetBytes(data.Substring(0, 130)));
//int c2Len = encryptedData.Length - 97;
//byte[] c2 = Hex.Decode(Encoding.ASCII.GetBytes(data.Substring(130, 2 * c2Len)));
//byte[] c3 = Hex.Decode(Encoding.ASCII.GetBytes(data.Substring(130 + 2 * c2Len, 64)));
//采用C1C3C2模式
byte[] c1Bytes = Hex.Decode(Encoding.ASCII.GetBytes(data.Substring(0, 130)));
int c2Len = encryptedData.Length - 97;
byte[] c3 = Hex.Decode(Encoding.ASCII.GetBytes(data.Substring(130, 64)));
byte[] c2 = Hex.Decode(Encoding.ASCII.GetBytes(data.Substring(130 + 64, 2 * c2Len)));
SM2 sm2 = SM2.Instance;
BigInteger userD = new BigInteger(1, privateKeyByte);
ECPoint c1 = sm2.ecc_curve.DecodePoint(c1Bytes);
Cipher cipher = new Cipher();
cipher.Init_dec(userD, c1);
cipher.Decrypt(c2);
cipher.Dofinal(c3);
return(Encoding.UTF8.GetString(c2));
}
private static void SM2_Sample()
{
var sm2Engine = new SM2();
var parameter = sm2Engine.KeyGenerator();
var pub = AsymmetricKeyUtilities.GetAsymmetricKeyParameterFormPublicKey(parameter.PublicKey);
var priv = AsymmetricKeyUtilities.GetAsymmetricKeyParameterFormAsn1PrivateKey(parameter.PrivateKey);
var p = sm2Engine.Encrypt("hello sm2", (ECPublicKeyParameters)pub);
var decStr = sm2Engine.Decrypt(p, (ECPrivateKeyParameters)priv);
Console.WriteLine(decStr);
}
/// <summary>
/// 加密
/// </summary>
/// <param name="publicKey">Base64表示的公钥</param>
/// <param name="text">需要加密的明文</param>
/// <returns>返回Base64表示的密文</returns>
public static string Encrypt(string publicKey, string text)
{
if (null == publicKey || null == text)
{
return(null);
}
byte[] publicKeyByte = Convert.FromBase64String(publicKey);
if (null == publicKeyByte || publicKeyByte.Length == 0)
{
return(null);
}
byte[] data = System.Text.Encoding.UTF8.GetBytes(text);
if (data == 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 sm2 = SM2.Instance;
ECPoint userKey = sm2.ecc_curve.DecodePoint(publicKeyByte);
ECPoint c1 = cipher.Init_enc(sm2, userKey);
cipher.Encrypt(source);
byte[] c3 = new byte[32];
cipher.Dofinal(c3);
string sc1 = Encoding.ASCII.GetString(Hex.Encode(c1.GetEncoded()));
string sc2 = Encoding.ASCII.GetString(Hex.Encode(source));
string sc3 = Encoding.ASCII.GetString(Hex.Encode(c3));
//string hexStr = (sc1 + sc2 + sc3).ToUpper(); //采用C1C2C3模式
string hexStr = sc1 + sc3 + sc2; //采用C1C3C2模式
byte[] bytes = Hex.Decode(hexStr);
return(Convert.ToBase64String(bytes));
}
/// <summary>
/// 私钥解密算法
/// </summary>
/// <param name="sm2">sm2对象</param>
/// <param name="pripk">自己的私钥</param>
/// <param name="id">id</param>
/// <returns></returns>
public string deciphering(SM2 sm2, string pripk, string mc1, string sc2, string mc3)
{
byte[] bc1 = new byte[32];
BigInteger userD = null;
// String sc2 = null;
byte[] c3 = new byte[32];
byte[] data;
bc1 = strToToHexByte(mc1);
c3 = strToToHexByte(mc3);
Readprikey(out userD, pripk);
// 解密过程
SM2.Cipher cipher = new SM2.Cipher();
cipher = new SM2.Cipher();
ECPoint c1 = sm2.ecc_curve.DecodePoint(bc1);
data = strToToHexByte(sc2);
cipher.Init_dec(userD, c1); //调用Init_dec,从c中取出比特串c1,将c1的数据类型转化为椭圆曲线上的点，如果不满足椭圆曲线上的点则报错。
cipher.Decrypt(data); //调用Decrypt方法
//System.String sdata1 = new UTF8Encoding().GetString(Hex.Encode(data));
string sdata = System.Text.Encoding.Default.GetString(data);
System.String sc3 = new UTF8Encoding().GetString(Hex.Encode(c3));
byte[] c3_ = new byte[32];
cipher.Dofinal(c3_);
System.String sc3_ = new UTF8Encoding().GetString(Hex.Encode(c3_));
//数据校验检测数据是否被篡改或丢失
if (sc3_.ToUpper().Equals(sc3.ToUpper()))//sc3_==sc3
{
return(sdata);
}
else
{
// System.Console.Out.WriteLine("数据校验失败!\n");//sc3_!=sc3
return("0");
}
}
public static void GenerateKeyPair(ResultKey ret)
{
SM2 sm2 = SM2.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;
System.Console.Out.WriteLine("公钥: " + Hex.ToHexString(publicKey.GetEncoded()).ToUpper());
System.Console.Out.WriteLine("私钥: " + Hex.ToHexString(privateKey.ToByteArray()).ToUpper());
//System.Console.Out.WriteLine("公钥: " + Encoding.ASCII.GetString(Hex.Encode(publicKey.GetEncoded())).ToUpper());
//System.Console.Out.WriteLine("私钥: " + Encoding.ASCII.GetString(Hex.Encode(privateKey.ToByteArray())).ToUpper());
ret.bytePubkey = publicKey.GetEncoded();
ret.bytePrikey = privateKey.ToByteArray();
ret.base64StrPubkey = Convert.ToBase64String(ret.bytePubkey);
ret.base64StrPrikey = Convert.ToBase64String(ret.bytePrikey);
}
/// <summary>
/// 生成公私钥，并存入文件夹
/// </summary>
/// <param name = "pripk">私钥文件地址</param>
/// <param name="ppk">公钥文件地址</param>
/// <param name="sm2">传入的SM2实例</param>
public void Creatkey(SM2 sm2, string pripk, string ppk)
{
AsymmetricCipherKeyPair keypair = null;
for (int i = 0; i < 1; i++)
{
keypair = sm2.ecc_key_pair_generator.GenerateKeyPair();
}
ECPrivateKeyParameters ecpriv = (ECPrivateKeyParameters)keypair.Private;
ECPublicKeyParameters ecpub = (ECPublicKeyParameters)keypair.Public;
BigInteger userD = ecpriv.D;
ECPoint Key = ecpub.Q;
byte[] userKeybyte = Key.GetEncoded();
System.String userKey = new UTF8Encoding().GetString(Hex.Encode(userKeybyte));
string avg = Console.ReadLine();
WriterKey(userD, pripk); //私钥
WriterKey(userKey, ppk); //公钥
}
public void setup(SM2 memCommand2)
{
_memCommand2 = memCommand2;
}
/// <summary>
/// Try get algorithm from mechanism.
/// </summary>
/// <param name="mechanism">Algorithm mechanism.</param>
/// <param name="algorithm">Algorithm.</param>
/// <returns></returns>
public static bool TryGetAlgorithm(string mechanism, out ISignatureAlgorithm algorithm)
{
mechanism = mechanism.Replace('_', '-').ToUpperInvariant();
switch (mechanism)
{
case "SHA1WITHCVC-ECDSA":
case "SHA-1WITHCVC-ECDSA": algorithm = SHA1withCVC_ECDSA; return(true);
case "SHA224WITHCVC-ECDSA":
case "SHA-224WITHCVC-ECDSA": algorithm = SHA224withCVC_ECDSA; return(true);
case "SHA256WITHCVC-ECDSA":
case "SHA-256WITHCVC-ECDSA": algorithm = SHA256withCVC_ECDSA; return(true);
case "SHA384WITHCVC-ECDSA":
case "SHA-384WITHCVC-ECDSA": algorithm = SHA384withCVC_ECDSA; return(true);
case "SHA512WITHCVC-ECDSA":
case "SHA-512WITHCVC-ECDSA": algorithm = SHA512withCVC_ECDSA; return(true);
case "ED25519": algorithm = new Ed25519(); return(true);
case "ED25519CTX": algorithm = new Ed25519ctx(); return(true);
case "ED25519PH": algorithm = new Ed25519ph(); return(true);
case "ED448": algorithm = new Ed448(); return(true);
case "ED448PH": algorithm = new Ed448ph(); return(true);
case "GOST3411WITHECGOST3410":
case "ECGOST3410":
case "ECGOST3410-2001":
case "ECGOST-3410":
case "ECGOST-3410-2001": algorithm = GOST3411withECGOST3410; return(true);
case "GOST3411WITHGOST3410":
case "GOST3410":
case "GOST3410-94":
case "GOST-3410":
case "GOST-3410-94": algorithm = GOST3411withGOST3410; return(true);
case "RIPEMD160WITHPLAIN-ECDSA":
case "RIPEMD-160WITHPLAIN-ECDSA": algorithm = RIPEMD160withPLAIN_ECDSA; return(true);
case "SHA1WITHPLAIN-ECDSA":
case "SHA-1WITHPLAIN-ECDSA": algorithm = SHA1withPLAIN_ECDSA; return(true);
case "SHA224WITHPLAIN-ECDSA":
case "SHA-224WITHPLAIN-ECDSA": algorithm = SHA224withPLAIN_ECDSA; return(true);
case "SHA256WITHPLAIN-ECDSA":
case "SHA-256WITHPLAIN-ECDSA": algorithm = SHA256withPLAIN_ECDSA; return(true);
case "SHA384WITHPLAIN-ECDSA":
case "SHA-384WITHPLAIN-ECDSA": algorithm = SHA384withPLAIN_ECDSA; return(true);
case "SHA512WITHPLAIN-ECDSA":
case "SHA-512WITHPLAIN-ECDSA": algorithm = SHA512withPLAIN_ECDSA; return(true);
case "PSSWITHRSA": algorithm = PSSwithRSA; return(true);
case "SHA1WITHDSA":
case "SHA-1WITHDSA": algorithm = SHA1withDSA; return(true);
case "SHA224WITHDSA":
case "SHA-224WITHDSA": algorithm = SHA224withDSA; return(true);
case "SHA256WITHDSA":
case "SHA-256WITHDSA": algorithm = SHA256withDSA; return(true);
case "SHA384WITHDSA":
case "SHA-384WITHDSA": algorithm = SHA384withDSA; return(true);
case "SHA512WITHDSA":
case "SHA-512WITHDSA": algorithm = SHA512withDSA; return(true);
case "SHA3-224WITHDSA":
case "SHA-3-224WITHDSA": algorithm = SHA3_224withDSA; return(true);
case "SHA3-256WITHDSA":
case "SHA-3-256WITHDSA": algorithm = SHA3_256withDSA; return(true);
case "SHA3-384WITHDSA":
case "SHA-3-384WITHDSA": algorithm = SHA3_384withDSA; return(true);
case "SHA3-512WITHDSA":
case "SHA-3-512WITHDSA": algorithm = SHA3_512withDSA; return(true);
case "SHA1WITHECDSA":
case "SHA-1WITHECDSA": algorithm = SHA1withECDSA; return(true);
case "SHA224WITHECDSA":
case "SHA-224WITHECDSA": algorithm = SHA224withECDSA; return(true);
case "SHA256WITHECDSA":
case "SHA-256WITHECDSA": algorithm = SHA256withECDSA; return(true);
case "SHA384WITHECDSA":
case "SHA-384WITHECDSA": algorithm = SHA384withECDSA; return(true);
case "SHA512WITHECDSA":
case "SHA-512WITHECDSA": algorithm = SHA512withECDSA; return(true);
case "SHA3-224WITHECDSA":
case "SHA-3-224WITHECDSA": algorithm = SHA3_224withECDSA; return(true);
case "SHA3-256WITHECDSA":
case "SHA-3-256WITHECDSA": algorithm = SHA3_256withECDSA; return(true);
case "SHA3-384WITHECDSA":
case "SHA-3-384WITHECDSA": algorithm = SHA3_384withECDSA; return(true);
case "SHA3-512WITHECDSA":
case "SHA-3-512WITHECDSA": algorithm = SHA3_512withECDSA; return(true);
case "MD2WITHRSA": algorithm = MD2withRSA; return(true);
case "MD5WITHRSA": algorithm = MD5withRSA; return(true);
case "RIPEMD128WITHRSA":
case "RIPEMD-128WITHRSA": algorithm = RIPEMD128withRSA; return(true);
case "RIPEMD160WITHRSA":
case "RIPEMD-160WITHRSA": algorithm = RIPEMD160withRSA; return(true);
case "RIPEMD256WITHRSA":
case "RIPEMD-256WITHRSA": algorithm = RIPEMD256withRSA; return(true);
case "SHA1WITHRSA":
case "SHA-1WITHRSA": algorithm = SHA1withRSA; return(true);
case "SHA224WITHRSA":
case "SHA-224WITHRSA": algorithm = SHA224withRSA; return(true);
case "SHA256WITHRSA":
case "SHA-256WITHRSA": algorithm = SHA256withRSA; return(true);
case "SHA384WITHRSA":
case "SHA-384WITHRSA": algorithm = SHA384withRSA; return(true);
case "SHA512WITHRSA":
case "SHA-512WITHRSA": algorithm = SHA512withRSA; return(true);
case "SHA3-224WITHRSA":
case "SHA-3-224WITHRSA": algorithm = SHA3_224withRSA; return(true);
case "SHA3-256WITHRSA":
case "SHA-3-256WITHRSA": algorithm = SHA3_256withRSA; return(true);
case "SHA3-384WITHRSA":
case "SHA-3-384WITHRSA": algorithm = SHA3_384withRSA; return(true);
case "SHA3-512WITHRSA":
case "SHA-3-512WITHRSA": algorithm = SHA3_512withRSA; return(true);
case "SHA1WITHRSAANDMGF1":
case "SHA-1WITHRSAANDMGF1": algorithm = PSSwithRSA; return(true);
case "SHA256WITHSM2":
case "SHA-256WITHSM2": algorithm = SHA256withSM2; return(true);
case "SM3WITHSM2": algorithm = SM3withSM2; return(true);
default: break;
}
string prefix;
string suffix;
int index = mechanism.IndexOf("WITH");
if (index >= 0)
{
prefix = mechanism.Substring(0, index);
suffix = mechanism.Substring(index + 4, mechanism.Length - index - 4);
}
else
{
prefix = string.Empty;
suffix = mechanism;
}
if (suffix == "ELGAMAL")
{
algorithm = null;
return(false);
}
if (HashAlgorithmHelper.TryGetAlgorithm(prefix, out IHashAlgorithm hashAlgorithm))
{
switch (suffix)
{
case "CVC-ECDSA": algorithm = new CVC_ECDSA(hashAlgorithm); return(true);
case "DSA": algorithm = new DSA(hashAlgorithm); return(true);
case "ECDSA": algorithm = new ECDSA(hashAlgorithm); return(true);
case "ECGOST3410":
case "ECGOST3410-2001":
case "ECGOST-3410":
case "ECGOST-3410-2001": algorithm = new ECGOST3410(hashAlgorithm); return(true);
case "ECNR": algorithm = new ECNR(hashAlgorithm); return(true);
case "GOST3410":
case "GOST3410-94":
case "GOST-3410":
case "GOST-3410-94": algorithm = new GOST3410(hashAlgorithm); return(true);
case "PLAIN-ECDSA": algorithm = new PLAIN_ECDSA(hashAlgorithm); return(true);
case "RSA": algorithm = new RSA(hashAlgorithm); return(true);
case "ISO9796-2":
case "RSA/ISO9796-2":
case "RSAANDISO9796-2": algorithm = new RSAandISO9796_2(hashAlgorithm); return(true);
case "RSAANDMGF1": algorithm = new RSAandMGF1(hashAlgorithm); return(true);
case "RSA/X9.31":
case "RSA/X931":
case "RSAANDX931":
case "RSAANDX9.31": algorithm = new RSAandX931(hashAlgorithm); return(true);
case "SM2": algorithm = new SM2(hashAlgorithm); return(true);
default: break;
}
}
algorithm = null;
return(false);
}
