Fixed handling of ustar tar files with long names.

SharpCompress.Test/Tar/TarArchiveTests.cs

@@ -40,6 +40,22 @@ namespace SharpCompress.Test
             }
         }
 
+        [TestMethod]
+        public void Tar_UstarArchivePathReadLongName()
+        {
+            string unmodified = Path.Combine(TEST_ARCHIVES_PATH, "ustar with long names.tar");
+            using(var archive = TarArchive.Open(unmodified))
+            {
+                Assert.AreEqual(6, archive.Entries.Count);
+                Assert.IsTrue(archive.Entries.Any(entry => entry.Key == "Directory/"));
+                Assert.IsTrue(archive.Entries.Any(entry => entry.Key == "Directory/Some file with veeeeeeeeeery loooooooooong name"));
+                Assert.IsTrue(archive.Entries.Any(entry => entry.Key == "Directory/Directory with veeeeeeeeeery loooooooooong name/"));
+                Assert.IsTrue(archive.Entries.Any(entry => entry.Key == "Directory/Directory with veeeeeeeeeery loooooooooong name/Some file with veeeeeeeeeery loooooooooong name"));
+                Assert.IsTrue(archive.Entries.Any(entry => entry.Key == "Directory/Directory with veeeeeeeeeery loooooooooong name/Directory with veeeeeeeeeery loooooooooong name/"));
+                Assert.IsTrue(archive.Entries.Any(entry => entry.Key == "Directory/Directory with veeeeeeeeeery loooooooooong name/Directory with veeeeeeeeeery loooooooooong name/Some file with veeeeeeeeeery loooooooooong name"));
+            }
+        }
+
         [TestMethod]
         public void Tar_Create_New()
         {

SharpCompress/Common/Tar/Headers/TarHeader.cs

@@ -120,7 +120,7 @@ namespace SharpCompress.Common.Tar.Headers
 
             Magic = ArchiveEncoding.Default.GetString(buffer, 257, 6).TrimNulls();
 
-            if (!string.IsNullOrEmpty(Magic) && "ustar ".Equals(Magic))
+            if (!string.IsNullOrEmpty(Magic) && "ustar".Equals(Magic))
             {
                 string namePrefix = ArchiveEncoding.Default.GetString(buffer, 345, 157);
                 namePrefix = namePrefix.TrimNulls();