Fix automatic key generation.

2 files changed, 34 insertions, 1 deletions

diff --git a/OATH.Net.Test/KeyTests.cs b/OATH.Net.Test/KeyTests.cs
index 7ddf93a..c5e8381 100644
--- a/OATH.Net.Test/KeyTests.cs
+++ b/OATH.Net.Test/KeyTests.cs
@@ -125,5 +125,27 @@ namespace OathNet.Test
 
             Assert.AreEqual(expected, actual);
         }
+
+        [Test]
+        public void Key_created_with_seed_returns_expected_key_data_1()
+        {
+            var seed = 870273;
+            var key = new Key(10, seed);
+            var actual = key.Base32;
+            var expected = "YLFDZHEU5CHZ3KDB";
+
+            Assert.AreEqual(expected, actual);
+        }
+
+        [Test]
+        public void Key_created_with_seed_returns_expected_key_data_2()
+        {
+            var seed = 20572632;
+            var key = new Key(8, seed);
+            var actual = key.Base32;
+            var expected = "OI7GKIQ7K63GS===";
+
+            Assert.AreEqual(expected, actual);
+        }
     }
 }
diff --git a/OATH.Net/Key.cs b/OATH.Net/Key.cs
index 66a98d7..7adb754 100644
--- a/OATH.Net/Key.cs
+++ b/OATH.Net/Key.cs
@@ -19,13 +19,24 @@ namespace OathNet
         private byte[] keyData;
 
         /// <summary>
-        ///     Initializes a new instance of the Key class and generates a random key.
+        ///     Initializes a new instance of the Key class and generates a random 10-byte key.
         /// </summary>
         public Key()
+            : this(10, (new Random()).Next())
         {
         }
 
         /// <summary>
+        ///     Initializes a new instance of the Key class and generates a random key with the specified seed.
+        /// </summary>
+        public Key(int keyLength, int seed)
+        {
+            this.keyData = new byte[keyLength];
+            var gen = new Random(seed);
+            gen.NextBytes(this.keyData);
+        }
+
+        /// <summary>
         ///     Initializes a new instance of the Key class.
         /// </summary>
         /// <param name="data">The key to initialize.</param>