add Json Web keys collection

with an ability to search keys by ids

src/JWT/Jwk/IJwtWebKeysCollection.cs

@@ -0,0 +1,7 @@
+namespace JWT.Jwk
+{
+    public interface IJwtWebKeysCollection
+    {
+        JwtWebKey Find(string keyId);
+    }
+}

src/JWT/Jwk/JwtWebKeysCollection.cs

@@ -0,0 +1,38 @@
+using System.Collections.Generic;
+using System.Linq;
+using JWT.Serializers;
+
+namespace JWT.Jwk
+{
+    public class JwtWebKeysCollection : IJwtWebKeysCollection
+    {
+        private readonly Dictionary<string, JwtWebKey> _keys;
+
+        public JwtWebKeysCollection(IEnumerable<JwtWebKey> keys)
+        {
+            _keys = keys.ToDictionary(x => x.KeyId);
+        }
+
+        public JwtWebKeysCollection(JwtWebKeySet keySet) : this(keySet.Keys)
+        {
+
+        }
+
+        public JwtWebKeysCollection(string keySet, IJsonSerializer serializer)
+            : this(serializer.Deserialize<JwtWebKeySet>(keySet))
+        {
+
+        }
+
+        public JwtWebKeysCollection(string keySet, IJsonSerializerFactory jsonSerializerFactory)
+            : this(keySet, jsonSerializerFactory.Create())
+        {
+
+        }
+
+        public JwtWebKey Find(string keyId)
+        {
+            return _keys.TryGetValue(keyId, out var key) ? key : null;
+        }
+    }
+}

tests/JWT.Tests.Common/Jwk/JwtWebKeysCollectionTests.cs

@@ -0,0 +1,22 @@
+using JWT.Jwk;
+using JWT.Serializers;
+using JWT.Tests.Models;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace JWT.Tests.Jwk;
+
+[TestClass]
+public class JwtWebKeysCollectionTests
+{
+    [TestMethod]
+    public void Should_Find_Json_Web_Key_By_KeyId()
+    {
+        var serializerFactory = new DefaultJsonSerializerFactory();
+
+        var collection = new JwtWebKeysCollection(TestData.JsonWebKeySet, serializerFactory);
+
+        var jwk = collection.Find(TestData.ServerRsaPublicThumbprint1);
+
+        Assert.IsNotNull(jwk);
+    }
+}

tests/JWT.Tests.Common/Models/TestData.cs

@@ -67,6 +67,8 @@ public class TestDataSystemTextSerializerDecorated
 
         public const string TokenByAsymmetricAlgorithm = "eyJraWQiOiJDRkFFQUUyRDY1MEE2Q0E5ODYyNTc1REU1NDM3MUVBOTgwNjQzODQ5IiwidHlwIjoiSldUIiwiYWxnIjoiUlMyNTYifQ.eyJpc3MiOiJ0ZXN0IiwiZXhwIjoyMTQ3NDgzNjQ4LCJGaXJzdE5hbWUiOiJKZXN1cyIsIkFnZSI6MzN9.ZeGfWN3kBHZLiSh4jzzn6kx7F6lNu5OsowZW0Sv-_wpSgQO2_QXFUPLx23wm4J9rjMGQlSksEtCLd_X3iiBOBLbxAUWzdj59iJIAh485unZj12sBJ7KHDVsOMc6DcSJdwRo9S9yiJ_RJ57R-dn4uRdZTBXBZHrrmb35UjaAG6hFfu5d1Ap4ZjLxqDJGl0Wo4j5l6vR8HFpmiFHvqPQ4apjqkBGnitJ7oghbeRX0SIVNSkXbBDp3i9pC-hxzs2oHZC9ys0rJlfpxLls3MV4oQbQ7m6W9MrwwsdObJHI7PiTNfObLKdgySi6WkQS7rwXVz0DqRa8TXv8_USkvhsyGLMQ";
 
+        public const string JsonWebKeySet = "{\"keys\":[{\"kty\":\"RSA\",\"kid\":\"CFAEAE2D650A6CA9862575DE54371EA980643849\",\"use\":\"sig\",\"n\":\"uYTPtHCIztKC3MUDxnZ0ktGVSQ0jVbD5rYl4pki4RCD3M22d-TklmvTyPj0SM7a_8o7cI05QhEuBI8hKCfC2CEJhlS3WFeVC0vwsl1aYFqQ3Ykr-kDsAdqjL95ioj3JmiscvqKOM34oQahpAgukJ7Kcr1BT2Ylk8fOgKcN7t1qgURNx0Pj4zJ4w0p1nT2gLG--bYutUVPvamI9wcMQyUesZwGmM9UUpMRzsOPk8vv7TbTm62Zkx-5rFUaVe5DFNUIMg92NvyU0392FFNCwptSflidHDG1ayCwL1ZTkJ0Z9yJXCNSzi_3ulxMhE-bVcpr_EuRKCYxn9qPFZ07Bd77bQ\",\"e\":\"AQAB\"}]}";
+
         public static readonly IDictionary<string, object> DictionaryPayload = new Dictionary<string, object>
         {
             { nameof(Customer.FirstName), Customer.FirstName },