Initial Commit

2023-06-21 12:46:23 -04:00
commit c70248a520
1352 changed files with 336780 additions and 0 deletions
--- a/iTechSharp/srcbc/security/PrivateKeyFactory.cs
+++ b/iTechSharp/srcbc/security/PrivateKeyFactory.cs
@@ -0,0 +1,177 @@
+using System;
+using System.Collections;
+using System.IO;
+using System.Text;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.CryptoPro;
+using Org.BouncyCastle.Asn1.Nist;
+using Org.BouncyCastle.Asn1.Oiw;
+using Org.BouncyCastle.Asn1.Pkcs;
+using Org.BouncyCastle.Asn1.Sec;
+using Org.BouncyCastle.Asn1.TeleTrust;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Asn1.X9;
+using Org.BouncyCastle.Crypto;
+using Org.BouncyCastle.Crypto.Parameters;
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Security
+{
+    public sealed class PrivateKeyFactory
+    {
+        private PrivateKeyFactory()
+        {
+        }
+
+		public static AsymmetricKeyParameter CreateKey(
+			byte[] privateKeyInfoData)
+		{
+			return CreateKey(
+				PrivateKeyInfo.GetInstance(
+					Asn1Object.FromByteArray(privateKeyInfoData)));
+		}
+
+		public static AsymmetricKeyParameter CreateKey(
+			Stream inStr)
+		{
+			return CreateKey(
+				PrivateKeyInfo.GetInstance(
+					Asn1Object.FromStream(inStr)));
+		}
+
+		public static AsymmetricKeyParameter CreateKey(
+			PrivateKeyInfo keyInfo)
+        {
+            AlgorithmIdentifier algID = keyInfo.AlgorithmID;
+			DerObjectIdentifier algOid = algID.ObjectID;
+
+			if (algOid.Equals(PkcsObjectIdentifiers.RsaEncryption))
+			{
+				RsaPrivateKeyStructure keyStructure = new RsaPrivateKeyStructure(
+					Asn1Sequence.GetInstance(keyInfo.PrivateKey));
+
+				return new RsaPrivateCrtKeyParameters(
+					keyStructure.Modulus,
+					keyStructure.PublicExponent,
+					keyStructure.PrivateExponent,
+					keyStructure.Prime1,
+					keyStructure.Prime2,
+					keyStructure.Exponent1,
+					keyStructure.Exponent2,
+					keyStructure.Coefficient);
+			}
+			else if (algOid.Equals(PkcsObjectIdentifiers.DhKeyAgreement))
+			{
+				DHParameter para = new DHParameter(
+					Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object()));
+				DerInteger derX = (DerInteger)keyInfo.PrivateKey;
+
+				return new DHPrivateKeyParameters(
+					derX.Value,
+					new DHParameters(para.P, para.G));
+			}
+			else if (algOid.Equals(OiwObjectIdentifiers.ElGamalAlgorithm))
+			{
+				ElGamalParameter  para = new ElGamalParameter(
+					Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object()));
+				DerInteger derX = (DerInteger)keyInfo.PrivateKey;
+
+				return new ElGamalPrivateKeyParameters(
+					derX.Value,
+					new ElGamalParameters(para.P, para.G));
+			}
+			else if (algOid.Equals(X9ObjectIdentifiers.IdDsa))
+			{
+				DsaParameter para = DsaParameter.GetInstance(
+					algID.Parameters.ToAsn1Object());
+				DerInteger derX = (DerInteger) keyInfo.PrivateKey;
+
+				return new DsaPrivateKeyParameters(
+					derX.Value,
+					new DsaParameters(para.P, para.Q, para.G));
+			}
+			else if (algOid.Equals(X9ObjectIdentifiers.IdECPublicKey))
+			{
+				X962Parameters para = new X962Parameters(algID.Parameters.ToAsn1Object());
+				X9ECParameters ecP;
+
+				if (para.IsNamedCurve)
+				{
+					// TODO ECGost3410NamedCurves support (returns ECDomainParameters though)
+
+					DerObjectIdentifier oid = (DerObjectIdentifier) para.Parameters;
+					ecP = X962NamedCurves.GetByOid(oid);
+
+					if (ecP == null)
+					{
+						ecP = SecNamedCurves.GetByOid(oid);
+
+						if (ecP == null)
+						{
+							ecP = NistNamedCurves.GetByOid(oid);
+
+							if (ecP == null)
+							{
+								ecP = TeleTrusTNamedCurves.GetByOid(oid);
+							}
+						}
+					}
+				}
+				else
+				{
+					ecP = new X9ECParameters((Asn1Sequence) para.Parameters);
+				}
+
+				ECDomainParameters dParams = new ECDomainParameters(
+					ecP.Curve,
+					ecP.G,
+					ecP.N,
+					ecP.H,
+					ecP.GetSeed());
+
+				ECPrivateKeyStructure ec = new ECPrivateKeyStructure(
+					Asn1Sequence.GetInstance(keyInfo.PrivateKey));
+
+				return new ECPrivateKeyParameters(ec.GetKey(), dParams);
+			}
+			else if (algOid.Equals(CryptoProObjectIdentifiers.GostR3410x2001))
+			{
+				Gost3410PublicKeyAlgParameters gostParams = new Gost3410PublicKeyAlgParameters(
+					Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object()));
+
+				ECPrivateKeyStructure ec = new ECPrivateKeyStructure(
+					Asn1Sequence.GetInstance(keyInfo.PrivateKey));
+
+				ECDomainParameters ecP = ECGost3410NamedCurves.GetByOid(gostParams.PublicKeyParamSet);
+
+				if (ecP == null)
+					return null;
+
+				return new ECPrivateKeyParameters(ec.GetKey(), gostParams.PublicKeyParamSet);
+			}
+			else if (algOid.Equals(CryptoProObjectIdentifiers.GostR3410x94))
+			{
+				Gost3410PublicKeyAlgParameters gostParams = new Gost3410PublicKeyAlgParameters(
+					Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object()));
+
+				DerOctetString derX = (DerOctetString) keyInfo.PrivateKey;
+				byte[] keyEnc = derX.GetOctets();
+				byte[] keyBytes = new byte[keyEnc.Length];
+
+				for (int i = 0; i != keyEnc.Length; i++)
+				{
+					keyBytes[i] = keyEnc[keyEnc.Length - 1 - i]; // was little endian
+				}
+
+				BigInteger x = new BigInteger(1, keyBytes);
+
+				return new Gost3410PrivateKeyParameters(x, gostParams.PublicKeyParamSet);
+			}
+			else
+			{
+				throw new SecurityUtilityException("algorithm identifier in key not recognised");
+			}
+        }
+    }
+}