up

Assets/BestHTTP/SecureProtocol/crypto/parameters/ECKeyParameters.cs

@@ -0,0 +1,140 @@
+#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
+
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.CryptoPro;
+using Org.BouncyCastle.Asn1.X9;
+using Org.BouncyCastle.Crypto.Generators;
+using Org.BouncyCastle.Security;
+using Org.BouncyCastle.Utilities;
+using Org.BouncyCastle.Utilities.Collections;
+
+namespace Org.BouncyCastle.Crypto.Parameters
+{
+    public abstract class ECKeyParameters
+        : AsymmetricKeyParameter
+    {
+        private static readonly string[] algorithms = { "EC", "ECDSA", "ECDH", "ECDHC", "ECGOST3410", "ECMQV" };
+
+        private readonly string algorithm;
+        private readonly ECDomainParameters parameters;
+        private readonly DerObjectIdentifier publicKeyParamSet;
+
+        protected ECKeyParameters(
+            string				algorithm,
+            bool				isPrivate,
+            ECDomainParameters	parameters)
+            : base(isPrivate)
+        {
+            if (algorithm == null)
+                throw new ArgumentNullException("algorithm");
+            if (parameters == null)
+                throw new ArgumentNullException("parameters");
+
+            this.algorithm = VerifyAlgorithmName(algorithm);
+            this.parameters = parameters;
+        }
+
+        protected ECKeyParameters(
+            string				algorithm,
+            bool				isPrivate,
+            DerObjectIdentifier	publicKeyParamSet)
+            : base(isPrivate)
+        {
+            if (algorithm == null)
+                throw new ArgumentNullException("algorithm");
+            if (publicKeyParamSet == null)
+                throw new ArgumentNullException("publicKeyParamSet");
+
+            this.algorithm = VerifyAlgorithmName(algorithm);
+            this.parameters = LookupParameters(publicKeyParamSet);
+            this.publicKeyParamSet = publicKeyParamSet;
+        }
+
+        public string AlgorithmName
+        {
+            get { return algorithm; }
+        }
+
+        public ECDomainParameters Parameters
+        {
+            get { return parameters; }
+        }
+
+        public DerObjectIdentifier PublicKeyParamSet
+        {
+            get { return publicKeyParamSet; }
+        }
+
+        public override bool Equals(
+            object obj)
+        {
+            if (obj == this)
+                return true;
+
+            ECDomainParameters other = obj as ECDomainParameters;
+
+            if (other == null)
+                return false;
+
+            return Equals(other);
+        }
+
+        protected bool Equals(
+            ECKeyParameters other)
+        {
+            return parameters.Equals(other.parameters) && base.Equals(other);
+        }
+
+        public override int GetHashCode()
+        {
+            return parameters.GetHashCode() ^ base.GetHashCode();
+        }
+
+        internal ECKeyGenerationParameters CreateKeyGenerationParameters(
+            SecureRandom random)
+        {
+            if (publicKeyParamSet != null)
+            {
+                return new ECKeyGenerationParameters(publicKeyParamSet, random);
+            }
+
+            return new ECKeyGenerationParameters(parameters, random);
+        }
+
+        internal static string VerifyAlgorithmName(string algorithm)
+        {
+            string upper = Platform.ToUpperInvariant(algorithm);
+            if (Array.IndexOf(algorithms, algorithm, 0, algorithms.Length) < 0)
+                throw new ArgumentException("unrecognised algorithm: " + algorithm, "algorithm");
+            return upper;
+        }
+
+        internal static ECDomainParameters LookupParameters(
+            DerObjectIdentifier publicKeyParamSet)
+        {
+            if (publicKeyParamSet == null)
+                throw new ArgumentNullException("publicKeyParamSet");
+
+            ECDomainParameters p = ECGost3410NamedCurves.GetByOid(publicKeyParamSet);
+
+            if (p == null)
+            {
+                X9ECParameters x9 = ECKeyPairGenerator.FindECCurveByOid(publicKeyParamSet);
+
+                if (x9 == null)
+                {
+                    throw new ArgumentException("OID is not a valid public key parameter set", "publicKeyParamSet");
+                }
+
+                p = new ECDomainParameters(x9.Curve, x9.G, x9.N, x9.H, x9.GetSeed());
+            }
+
+            return p;
+        }
+    }
+}
+
+#endif