Handle invalid unix timestamps

Author: Krusen

BencodeNET.Tests/Parsing/TorrentParserTests.cs

@@ -114,6 +114,22 @@ public void CreationDate_UnixTimeInMilliseconds_IsParsed()
             torrent.CreationDate.Should().Be(new DateTime(2016, 1, 1));
         }
 
+        [Theory]
+        [AutoMockedData]
+        public void CreationDate_InvalidValue_ReturnsEpoch()
+        {
+            // Arrange
+            ParsedData = ValidSingleFileTorrentData;
+            ParsedData[TorrentFields.CreationDate] = (BNumber) long.MaxValue;
+
+            // Act
+            var parser = new TorrentParser(BencodeParser);
+            var torrent = parser.Parse((BencodeStream) null);
+
+            // Assert
+            torrent.CreationDate.Should().Be(new DateTime(1970, 1, 1));
+        }
+
         [Theory]
         [InlineAutoMockedData("utf8")]
         [InlineAutoMockedData("UTF8")]

BencodeNET/Objects/BNumber.cs

@@ -75,8 +75,14 @@ public static implicit operator bool(BNumber bint)
 
             if (number.Value > int.MaxValue)
             {
-                // Assuming unix timestamp is in milliseconds instead of seconds
-                return Epoch.AddMilliseconds(number);
+                try
+                {
+                    return Epoch.AddMilliseconds(number);
+                }
+                catch (ArgumentOutOfRangeException)
+                {
+                    return Epoch;
+                }
             }
 
             return Epoch.AddSeconds(number);