Add test.

Author: teo-tsirpanis

sdk/test/NetStandard/UnitTests/Core/AWS4aSignerTests.cs

@@ -0,0 +1,40 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ * 
+ *  http://aws.amazon.com/apache2.0
+ * 
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+using Amazon.Runtime.Internal.Auth;
+using Amazon.Util;
+using Xunit;
+
+namespace UnitTests.NetStandard.Core
+{
+    public class AWS4aSignerTests
+    {
+        private const string SigningTestAccessKeyId = "AKIDEXAMPLE";
+        private const string SigningTestSecretAccessKey = "wJalrXUtnFEMI/K7MDENG+bPxRfiCYEXAMPLEKEY";
+
+        /* The public coordinates of the ecc key derived from the above credentials pair */
+        private const string SigningTestEccPubX = "b6618f6a65740a99e650b33b6b4b5bd0d43b176d721a3edfea7e7d2d56d936b1";
+        private const string SigningTestEccPubY = "865ed22a7eadc9c5cb9d2cbaca1b3699139fedc5043dc6661864218330c8e518";
+
+        [Fact]
+        public void DeriveSigningKey()
+        {
+            using var key = AWS4aSigner.ComputeSigningKey(SigningTestAccessKeyId, SigningTestSecretAccessKey);
+            var parameters = key.ExportParameters(false);
+            Assert.Equal(AWSSDKUtils.HexStringToBytes(SigningTestEccPubX), parameters.Q.X);
+            Assert.Equal(AWSSDKUtils.HexStringToBytes(SigningTestEccPubY), parameters.Q.Y);
+        }
+    }
+}