Initial Commit

iTechSharp/srcbc/crypto/parameters/ECKeyGenerationParameters.cs

@@ -0,0 +1,55 @@
+using System;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.CryptoPro;
+using Org.BouncyCastle.Security;
+
+namespace Org.BouncyCastle.Crypto.Parameters
+{
+    public class ECKeyGenerationParameters
+		: KeyGenerationParameters
+    {
+        private readonly ECDomainParameters domainParams;
+		private readonly DerObjectIdentifier publicKeyParamSet;
+
+		public ECKeyGenerationParameters(
+			ECDomainParameters	domainParameters,
+			SecureRandom		random)
+			: base(random, domainParameters.N.BitLength)
+        {
+            this.domainParams = domainParameters;
+        }
+
+		public ECKeyGenerationParameters(
+			DerObjectIdentifier	publicKeyParamSet,
+			SecureRandom		random)
+			: this(LookupParameters(publicKeyParamSet), random)
+		{
+			this.publicKeyParamSet = publicKeyParamSet;
+		}
+
+		public ECDomainParameters DomainParameters
+        {
+			get { return domainParams; }
+        }
+
+		public DerObjectIdentifier PublicKeyParamSet
+		{
+			get { return publicKeyParamSet; }
+		}
+
+		private static ECDomainParameters LookupParameters(
+			DerObjectIdentifier publicKeyParamSet)
+		{
+			if (publicKeyParamSet == null)
+				throw new ArgumentNullException("publicKeyParamSet");
+
+			ECDomainParameters p = ECGost3410NamedCurves.GetByOid(publicKeyParamSet);
+
+			if (p == null)
+				throw new ArgumentException("OID is not a valid CryptoPro public key parameter set", "publicKeyParamSet");
+
+			return p;
+		}
+    }
+}