init commit

2025-10-09 09:57:24 +09:00
commit 4d551bd74f
6636 changed files with 1218703 additions and 0 deletions
--- a/output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Signers/Gost3410Signer.cs
+++ b/output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Signers/Gost3410Signer.cs
@@ -0,0 +1,92 @@
+using Org.BouncyCastle.Crypto.Parameters;
+using Org.BouncyCastle.Math;
+using Org.BouncyCastle.Security;
+
+namespace Org.BouncyCastle.Crypto.Signers;
+
+public class Gost3410Signer : IDsaExt, IDsa
+{
+	private Gost3410KeyParameters key;
+
+	private SecureRandom random;
+
+	public virtual string AlgorithmName => "GOST3410";
+
+	public virtual BigInteger Order => key.Parameters.Q;
+
+	public virtual void Init(bool forSigning, ICipherParameters parameters)
+	{
+		if (forSigning)
+		{
+			if (parameters is ParametersWithRandom)
+			{
+				ParametersWithRandom parametersWithRandom = (ParametersWithRandom)parameters;
+				random = parametersWithRandom.Random;
+				parameters = parametersWithRandom.Parameters;
+			}
+			else
+			{
+				random = new SecureRandom();
+			}
+			if (!(parameters is Gost3410PrivateKeyParameters))
+			{
+				throw new InvalidKeyException("GOST3410 private key required for signing");
+			}
+			key = (Gost3410PrivateKeyParameters)parameters;
+		}
+		else
+		{
+			if (!(parameters is Gost3410PublicKeyParameters))
+			{
+				throw new InvalidKeyException("GOST3410 public key required for signing");
+			}
+			key = (Gost3410PublicKeyParameters)parameters;
+		}
+	}
+
+	public virtual BigInteger[] GenerateSignature(byte[] message)
+	{
+		byte[] array = new byte[message.Length];
+		for (int i = 0; i != array.Length; i++)
+		{
+			array[i] = message[array.Length - 1 - i];
+		}
+		BigInteger val = new BigInteger(1, array);
+		Gost3410Parameters parameters = key.Parameters;
+		BigInteger bigInteger;
+		do
+		{
+			bigInteger = new BigInteger(parameters.Q.BitLength, random);
+		}
+		while (bigInteger.CompareTo(parameters.Q) >= 0);
+		BigInteger bigInteger2 = parameters.A.ModPow(bigInteger, parameters.P).Mod(parameters.Q);
+		BigInteger bigInteger3 = bigInteger.Multiply(val).Add(((Gost3410PrivateKeyParameters)key).X.Multiply(bigInteger2)).Mod(parameters.Q);
+		return new BigInteger[2] { bigInteger2, bigInteger3 };
+	}
+
+	public virtual bool VerifySignature(byte[] message, BigInteger r, BigInteger s)
+	{
+		byte[] array = new byte[message.Length];
+		for (int i = 0; i != array.Length; i++)
+		{
+			array[i] = message[array.Length - 1 - i];
+		}
+		BigInteger bigInteger = new BigInteger(1, array);
+		Gost3410Parameters parameters = key.Parameters;
+		if (r.SignValue < 0 || parameters.Q.CompareTo(r) <= 0)
+		{
+			return false;
+		}
+		if (s.SignValue < 0 || parameters.Q.CompareTo(s) <= 0)
+		{
+			return false;
+		}
+		BigInteger val = bigInteger.ModPow(parameters.Q.Subtract(BigInteger.Two), parameters.Q);
+		BigInteger e = s.Multiply(val).Mod(parameters.Q);
+		BigInteger e2 = parameters.Q.Subtract(r).Multiply(val).Mod(parameters.Q);
+		e = parameters.A.ModPow(e, parameters.P);
+		e2 = ((Gost3410PublicKeyParameters)key).Y.ModPow(e2, parameters.P);
+		BigInteger bigInteger2 = e.Multiply(e2).Mod(parameters.P).Mod(parameters.Q);
+		return bigInteger2.Equals(r);
+	}
+}