Initial checkin of gRPC to third_party/

third_party/grpc/src/csharp/Grpc.Core/ServerCredentials.cs

Index: third_party/grpc/src/csharp/Grpc.Core/ServerCredentials.cs
diff --git a/third_party/grpc/src/csharp/Grpc.Core/ServerCredentials.cs b/third_party/grpc/src/csharp/Grpc.Core/ServerCredentials.cs
new file mode 100644
index 0000000000000000000000000000000000000000..456d331c9c317b5d0e2f402f7dfb0298bdb542f0
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+++ b/third_party/grpc/src/csharp/Grpc.Core/ServerCredentials.cs
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+#region Copyright notice and license
+
+// Copyright 2015-2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
+
+namespace Grpc.Core
+{
+    /// <summary>
+    /// Server side credentials.
+    /// </summary>
+    public abstract class ServerCredentials
+    {
+        static readonly ServerCredentials InsecureInstance = new InsecureServerCredentialsImpl();
+
+        /// <summary>
+        /// Returns instance of credential that provides no security and 
+        /// will result in creating an unsecure server port with no encryption whatsoever.
+        /// </summary>
+        public static ServerCredentials Insecure
+        {
+            get
+            {
+                return InsecureInstance;
+            }
+        }
+
+        /// <summary>
+        /// Creates native object for the credentials.
+        /// </summary>
+        /// <returns>The native credentials.</returns>
+        internal abstract ServerCredentialsSafeHandle ToNativeCredentials();
+
+        private sealed class InsecureServerCredentialsImpl : ServerCredentials
+        {
+            internal override ServerCredentialsSafeHandle ToNativeCredentials()
+            {
+                return null;
+            }
+        }
+    }
+
+    /// <summary>
+    /// Server-side SSL credentials.
+    /// </summary>
+    public class SslServerCredentials : ServerCredentials
+    {
+        readonly IList<KeyCertificatePair> keyCertificatePairs;
+        readonly string rootCertificates;
+        readonly bool forceClientAuth;
+
+        /// <summary>
+        /// Creates server-side SSL credentials.
+        /// </summary>
+        /// <param name="keyCertificatePairs">Key-certificates to use.</param>
+        /// <param name="rootCertificates">PEM encoded client root certificates used to authenticate client.</param>
+        /// <param name="forceClientAuth">If true, client will be rejected unless it proves its unthenticity using against rootCertificates.</param>
+        public SslServerCredentials(IEnumerable<KeyCertificatePair> keyCertificatePairs, string rootCertificates, bool forceClientAuth)
+        {
+            this.keyCertificatePairs = new List<KeyCertificatePair>(keyCertificatePairs).AsReadOnly();
+            GrpcPreconditions.CheckArgument(this.keyCertificatePairs.Count > 0,
+                "At least one KeyCertificatePair needs to be provided.");
+            if (forceClientAuth)
+            {
+                GrpcPreconditions.CheckNotNull(rootCertificates,
+                    "Cannot force client authentication unless you provide rootCertificates.");
+            }
+            this.rootCertificates = rootCertificates;
+            this.forceClientAuth = forceClientAuth;
+        }
+
+        /// <summary>
+        /// Creates server-side SSL credentials.
+        /// This constructor should be use if you do not wish to autheticate client
+        /// using client root certificates.
+        /// </summary>
+        /// <param name="keyCertificatePairs">Key-certificates to use.</param>
+        public SslServerCredentials(IEnumerable<KeyCertificatePair> keyCertificatePairs) : this(keyCertificatePairs, null, false)
+        {
+        }
+
+        /// <summary>
+        /// Key-certificate pairs.
+        /// </summary>
+        public IList<KeyCertificatePair> KeyCertificatePairs
+        {
+            get
+            {
+                return this.keyCertificatePairs;
+            }
+        }
+
+        /// <summary>
+        /// PEM encoded client root certificates.
+        /// </summary>
+        public string RootCertificates
+        {
+            get
+            {
+                return this.rootCertificates;
+            }
+        }
+
+        /// <summary>
+        /// If true, the authenticity of client check will be enforced.
+        /// </summary>
+        public bool ForceClientAuthentication
+        {
+            get
+            {
+                return this.forceClientAuth;
+            }
+        }
+
+        internal override ServerCredentialsSafeHandle ToNativeCredentials()
+        {
+            int count = keyCertificatePairs.Count;
+            string[] certChains = new string[count];
+            string[] keys = new string[count];
+            for (int i = 0; i < count; i++)
+            {
+                certChains[i] = keyCertificatePairs[i].CertificateChain;
+                keys[i] = keyCertificatePairs[i].PrivateKey;
+            }
+            return ServerCredentialsSafeHandle.CreateSslCredentials(rootCertificates, certChains, keys, forceClientAuth);
+        }
+    }
+}