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Assets/BestHTTP/SecureProtocol/crypto/tls/SignatureAndHashAlgorithm.cs

@@ -0,0 +1,98 @@
+#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
+
+using System;
+using System.IO;
+
+namespace Org.BouncyCastle.Crypto.Tls
+{
+    /**
+     * RFC 5246 7.4.1.4.1
+     */
+    public class SignatureAndHashAlgorithm
+    {
+        protected readonly byte mHash;
+        protected readonly byte mSignature;
+
+        /**
+         * @param hash      {@link HashAlgorithm}
+         * @param signature {@link SignatureAlgorithm}
+         */
+        public SignatureAndHashAlgorithm(byte hash, byte signature)
+        {
+            if (!TlsUtilities.IsValidUint8(hash))
+            {
+                throw new ArgumentException("should be a uint8", "hash");
+            }
+            if (!TlsUtilities.IsValidUint8(signature))
+            {
+                throw new ArgumentException("should be a uint8", "signature");
+            }
+            if (signature == SignatureAlgorithm.anonymous)
+            {
+                throw new ArgumentException("MUST NOT be \"anonymous\"", "signature");
+            }
+
+            this.mHash = hash;
+            this.mSignature = signature;
+        }
+
+        /**
+         * @return {@link HashAlgorithm}
+         */
+        public virtual byte Hash
+        {
+            get { return mHash; }
+        }
+
+        /**
+         * @return {@link SignatureAlgorithm}
+         */
+        public virtual byte Signature
+        {
+            get { return mSignature; }
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (!(obj is SignatureAndHashAlgorithm))
+            {
+                return false;
+            }
+            SignatureAndHashAlgorithm other = (SignatureAndHashAlgorithm)obj;
+            return other.Hash == Hash && other.Signature == Signature;
+        }
+
+        public override int GetHashCode()
+        {
+            return ((int)Hash << 16) | (int)Signature;
+        }
+
+        /**
+         * Encode this {@link SignatureAndHashAlgorithm} to a {@link Stream}.
+         *
+         * @param output the {@link Stream} to encode to.
+         * @throws IOException
+         */
+        public virtual void Encode(Stream output)
+        {
+            TlsUtilities.WriteUint8(Hash, output);
+            TlsUtilities.WriteUint8(Signature, output);
+        }
+
+        /**
+         * Parse a {@link SignatureAndHashAlgorithm} from a {@link Stream}.
+         *
+         * @param input the {@link Stream} to parse from.
+         * @return a {@link SignatureAndHashAlgorithm} object.
+         * @throws IOException
+         */
+        public static SignatureAndHashAlgorithm Parse(Stream input)
+        {
+            byte hash = TlsUtilities.ReadUint8(input);
+            byte signature = TlsUtilities.ReadUint8(input);
+            return new SignatureAndHashAlgorithm(hash, signature);
+        }
+    }
+}
+
+#endif