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

@@ -0,0 +1,74 @@
+#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
+
+using System;
+using System.IO;
+
+namespace Org.BouncyCastle.Crypto.Tls
+{
+    public class DigitallySigned
+    {
+        protected readonly SignatureAndHashAlgorithm mAlgorithm;
+        protected readonly byte[] mSignature;
+
+        public DigitallySigned(SignatureAndHashAlgorithm algorithm, byte[] signature)
+        {
+            if (signature == null)
+                throw new ArgumentNullException("signature");
+
+            this.mAlgorithm = algorithm;
+            this.mSignature = signature;
+        }
+
+        /**
+         * @return a {@link SignatureAndHashAlgorithm} (or null before TLS 1.2).
+         */
+        public virtual SignatureAndHashAlgorithm Algorithm
+        {
+            get { return mAlgorithm; }
+        }
+
+        public virtual byte[] Signature
+        {
+            get { return mSignature; }
+        }
+
+        /**
+         * Encode this {@link DigitallySigned} to a {@link Stream}.
+         * 
+         * @param output
+         *            the {@link Stream} to encode to.
+         * @throws IOException
+         */
+        public virtual void Encode(Stream output)
+        {
+            if (mAlgorithm != null)
+            {
+                mAlgorithm.Encode(output);
+            }
+            TlsUtilities.WriteOpaque16(mSignature, output);
+        }
+
+        /**
+         * Parse a {@link DigitallySigned} from a {@link Stream}.
+         * 
+         * @param context
+         *            the {@link TlsContext} of the current connection.
+         * @param input
+         *            the {@link Stream} to parse from.
+         * @return a {@link DigitallySigned} object.
+         * @throws IOException
+         */
+        public static DigitallySigned Parse(TlsContext context, Stream input)
+        {
+            SignatureAndHashAlgorithm algorithm = null;
+            if (TlsUtilities.IsTlsV12(context))
+            {
+                algorithm = SignatureAndHashAlgorithm.Parse(input);
+            }
+            byte[] signature = TlsUtilities.ReadOpaque16(input);
+            return new DigitallySigned(algorithm, signature);
+        }
+    }
+}
+
+#endif