Add BouncyCastle PCL files v1.7.0

1 files changed, 221 insertions, 0 deletions

diff --git a/Crypto/src/security/PrivateKeyFactory.cs b/Crypto/src/security/PrivateKeyFactory.cs
new file mode 100644
index 000000000..5ebebd55a
--- /dev/null
+++ b/Crypto/src/security/PrivateKeyFactory.cs
@@ -0,0 +1,221 @@
+using System;
+using System.Collections;
+using System.IO;
+using System.Text;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.CryptoPro;
+using Org.BouncyCastle.Asn1.Oiw;
+using Org.BouncyCastle.Asn1.Pkcs;
+using Org.BouncyCastle.Asn1.Sec;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Asn1.X9;
+using Org.BouncyCastle.Crypto;
+using Org.BouncyCastle.Crypto.Generators;
+using Org.BouncyCastle.Crypto.Parameters;
+using Org.BouncyCastle.Math;
+using Org.BouncyCastle.Pkcs;
+
+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;
+
+			// TODO See RSAUtil.isRsaOid in Java build
+			if (algOid.Equals(PkcsObjectIdentifiers.RsaEncryption)
+				|| algOid.Equals(X509ObjectIdentifiers.IdEARsa)
+				|| algOid.Equals(PkcsObjectIdentifiers.IdRsassaPss)
+				|| algOid.Equals(PkcsObjectIdentifiers.IdRsaesOaep))
+			{
+				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);
+			}
+			// TODO?
+//			else if (algOid.Equals(X9ObjectIdentifiers.DHPublicNumber))
+			else if (algOid.Equals(PkcsObjectIdentifiers.DhKeyAgreement))
+			{
+				DHParameter para = new DHParameter(
+					Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object()));
+				DerInteger derX = (DerInteger)keyInfo.PrivateKey;
+
+				BigInteger lVal = para.L;
+				int l = lVal == null ? 0 : lVal.IntValue;
+				DHParameters dhParams = new DHParameters(para.P, para.G, null, l);
+
+				return new DHPrivateKeyParameters(derX.Value, dhParams, algOid);
+			}
+			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))
+			{
+				DerInteger derX = (DerInteger) keyInfo.PrivateKey;
+				Asn1Encodable ae = algID.Parameters;
+
+				DsaParameters parameters = null;
+				if (ae != null)
+				{
+					DsaParameter para = DsaParameter.GetInstance(ae.ToAsn1Object());
+					parameters = new DsaParameters(para.P, para.Q, para.G);
+				}
+
+				return new DsaPrivateKeyParameters(derX.Value, parameters);
+			}
+			else if (algOid.Equals(X9ObjectIdentifiers.IdECPublicKey))
+			{
+				X962Parameters para = new X962Parameters(algID.Parameters.ToAsn1Object());
+
+				X9ECParameters x9;
+				if (para.IsNamedCurve)
+				{
+                    x9 = ECKeyPairGenerator.FindECCurveByOid((DerObjectIdentifier)para.Parameters);
+				}
+				else
+				{
+                    x9 = new X9ECParameters((Asn1Sequence)para.Parameters);
+				}
+
+                ECPrivateKeyStructure ec = new ECPrivateKeyStructure(
+                    Asn1Sequence.GetInstance(keyInfo.PrivateKey));
+                BigInteger d = ec.GetKey();
+
+                if (para.IsNamedCurve)
+                {
+                    return new ECPrivateKeyParameters("EC", d, (DerObjectIdentifier)para.Parameters);
+                }
+
+                ECDomainParameters dParams = new ECDomainParameters(x9.Curve, x9.G, x9.N, x9.H,  x9.GetSeed());
+				return new ECPrivateKeyParameters(d, 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("ECGOST3410", 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");
+			}
+        }
+
+		public static AsymmetricKeyParameter DecryptKey(
+			char[]					passPhrase,
+			EncryptedPrivateKeyInfo	encInfo)
+		{
+			return CreateKey(PrivateKeyInfoFactory.CreatePrivateKeyInfo(passPhrase, encInfo));
+		}
+
+		public static AsymmetricKeyParameter DecryptKey(
+			char[]	passPhrase,
+			byte[]	encryptedPrivateKeyInfoData)
+		{
+			return DecryptKey(passPhrase, Asn1Object.FromByteArray(encryptedPrivateKeyInfoData));
+		}
+
+		public static AsymmetricKeyParameter DecryptKey(
+			char[]	passPhrase,
+			Stream	encryptedPrivateKeyInfoStream)
+		{
+			return DecryptKey(passPhrase, Asn1Object.FromStream(encryptedPrivateKeyInfoStream));
+		}
+
+		private static AsymmetricKeyParameter DecryptKey(
+			char[]		passPhrase,
+			Asn1Object	asn1Object)
+		{
+			return DecryptKey(passPhrase, EncryptedPrivateKeyInfo.GetInstance(asn1Object));
+		}
+
+        public static byte[] EncryptKey(
+            DerObjectIdentifier		algorithm,
+            char[]					passPhrase,
+            byte[]					salt,
+            int						iterationCount,
+            AsymmetricKeyParameter	key)
+        {
+			return EncryptedPrivateKeyInfoFactory.CreateEncryptedPrivateKeyInfo(
+				algorithm, passPhrase, salt, iterationCount, key).GetEncoded();
+        }
+
+		public static byte[] EncryptKey(
+			string					algorithm,
+            char[]					passPhrase,
+            byte[]					salt,
+            int						iterationCount,
+            AsymmetricKeyParameter	key)
+        {
+			return EncryptedPrivateKeyInfoFactory.CreateEncryptedPrivateKeyInfo(
+				algorithm, passPhrase, salt, iterationCount, key).GetEncoded();
+        }
+	}
+}