diff --git a/LibHac/Keyset.cs b/LibHac/Keyset.cs
index 68c256bd..c8c15777 100644
--- a/LibHac/Keyset.cs
+++ b/LibHac/Keyset.cs
@@ -269,9 +269,10 @@ namespace LibHac
     public static class ExternalKeys
     {
         private const int TitleKeySize = 0x10;
-        private static readonly Dictionary<string, KeyValue> CommonKeyDict;
-        private static readonly Dictionary<string, KeyValue> UniqueKeyDict;
-        private static readonly Dictionary<string, KeyValue> AllKeyDict;
+
+        public static readonly Dictionary<string, KeyValue> CommonKeyDict;
+        public static readonly Dictionary<string, KeyValue> UniqueKeyDict;
+        public static readonly Dictionary<string, KeyValue> AllKeyDict;
 
         static ExternalKeys()
         {
@@ -393,12 +394,12 @@ namespace LibHac
             }
         }
 
-        public static string PrintKeys(Keyset keyset)
+        public static string PrintKeys(Keyset keyset, Dictionary<string, KeyValue> dict)
         {
             var sb = new StringBuilder();
-            int maxNameLength = CommonKeyDict.Values.Max(x => x.Name.Length);
+            int maxNameLength = dict.Values.Max(x => x.Name.Length);
 
-            foreach (KeyValue keySlot in CommonKeyDict.Values.OrderBy(x => x.Name))
+            foreach (KeyValue keySlot in dict.Values.OrderBy(x => x.Name))
             {
                 byte[] key = keySlot.GetKey(keyset);
                 if (key.IsEmpty()) continue;
@@ -410,6 +411,37 @@ namespace LibHac
             return sb.ToString();
         }
 
+        public static string PrintCommonKeys(Keyset keyset)
+        {
+            return PrintKeys(keyset, CommonKeyDict);
+        }
+
+        public static string PrintUniqueKeys(Keyset keyset)
+        {
+            return PrintKeys(keyset, UniqueKeyDict);
+        }
+
+        public static string PrintAllKeys(Keyset keyset)
+        {
+            return PrintKeys(keyset, AllKeyDict);
+        }
+
+        public static string PrintTitleKeys(Keyset keyset)
+        {
+            var sb = new StringBuilder();
+            int maxNameLength = keyset.TitleKeys.Values.Max(x => x.Length);
+
+            foreach (KeyValuePair<byte[], byte[]> kv in keyset.TitleKeys)
+            {
+                byte[] key = kv.Key;
+                byte[] value = kv.Value;
+                var line = $"{key.ToHexString().PadRight(maxNameLength)} = {value.ToHexString()}";
+                sb.AppendLine(line);
+            }
+
+            return sb.ToString();
+        }
+
         private static List<KeyValue> CreateCommonKeyList()
         {
             var keys = new List<KeyValue>
@@ -489,7 +521,7 @@ namespace LibHac
             return keys;
         }
 
-        private class KeyValue
+        public class KeyValue
         {
             public readonly string Name;
             public readonly int Size;
diff --git a/libhac/Lz4.cs b/libhac/Lz4.cs
new file mode 100644
index 00000000..cfb49551
--- /dev/null
+++ b/libhac/Lz4.cs
@@ -0,0 +1,78 @@
+using System;
+
+namespace Ryujinx.HLE.Loaders.Compression
+{
+    static class Lz4
+    {
+        public static byte[] Decompress(byte[] Cmp, int DecLength)
+        {
+            byte[] Dec = new byte[DecLength];
+
+            int CmpPos = 0;
+            int DecPos = 0;
+
+            int GetLength(int Length)
+            {
+                byte Sum;
+
+                if (Length == 0xf)
+                {
+                    do
+                    {
+                        Length += (Sum = Cmp[CmpPos++]);
+                    }
+                    while (Sum == 0xff);
+                }
+
+                return Length;
+            }
+
+            do
+            {
+                byte Token = Cmp[CmpPos++];
+
+                int EncCount = (Token >> 0) & 0xf;
+                int LitCount = (Token >> 4) & 0xf;
+
+                //Copy literal chunck
+                LitCount = GetLength(LitCount);
+
+                Buffer.BlockCopy(Cmp, CmpPos, Dec, DecPos, LitCount);
+
+                CmpPos += LitCount;
+                DecPos += LitCount;
+
+                if (CmpPos >= Cmp.Length)
+                {
+                    break;
+                }
+
+                //Copy compressed chunck
+                int Back = Cmp[CmpPos++] << 0 |
+                           Cmp[CmpPos++] << 8;
+
+                EncCount = GetLength(EncCount) + 4;
+
+                int EncPos = DecPos - Back;
+
+                if (EncCount <= Back)
+                {
+                    Buffer.BlockCopy(Dec, EncPos, Dec, DecPos, EncCount);
+
+                    DecPos += EncCount;
+                }
+                else
+                {
+                    while (EncCount-- > 0)
+                    {
+                        Dec[DecPos++] = Dec[EncPos++];
+                    }
+                }
+            }
+            while (CmpPos < Cmp.Length &&
+                   DecPos < Dec.Length);
+
+            return Dec;
+        }
+    }
+}
\ No newline at end of file
diff --git a/libhac/Nso.cs b/libhac/Nso.cs
new file mode 100644
index 00000000..c777c12b
--- /dev/null
+++ b/libhac/Nso.cs
@@ -0,0 +1,114 @@
+using System.Collections;
+using System.IO;
+using LibHac.Streams;
+using Ryujinx.HLE.Loaders.Compression;
+
+namespace LibHac
+{
+    public class Nso
+    {
+        public NsoSection[] Sections { get; }
+        public RodataRelativeExtent[] RodataRelativeExtents { get; }
+        public uint BssSize { get; }
+        public byte[] BuildId { get; } = new byte[0x20];
+
+        private SharedStreamSource StreamSource { get; }
+
+        public Nso(Stream stream)
+        {
+            StreamSource = new SharedStreamSource(stream);
+            BinaryReader reader = new BinaryReader(StreamSource.CreateStream());
+            if (reader.ReadAscii(4) != "NSO0")
+                throw new InvalidDataException("NSO magic is incorrect!");
+            reader.ReadUInt32(); // Version
+            reader.ReadUInt32(); // Reserved/Unused
+            BitArray flags = new BitArray(new[] { (int)reader.ReadUInt32() });
+            NsoSection textSection = new NsoSection(StreamSource);
+            NsoSection rodataSection = new NsoSection(StreamSource);
+            NsoSection dataSection = new NsoSection(StreamSource);
+            textSection.IsCompressed = flags[0];
+            rodataSection.IsCompressed = flags[1];
+            dataSection.IsCompressed = flags[2];
+            textSection.CheckHash = flags[3];
+            rodataSection.CheckHash = flags[4];
+            dataSection.CheckHash = flags[5];
+
+            textSection.ReadSegmentHeader(reader);
+            reader.ReadUInt32(); // Module offset (TODO)
+            rodataSection.ReadSegmentHeader(reader);
+            reader.ReadUInt32(); // Module file size
+            dataSection.ReadSegmentHeader(reader);
+            BssSize = reader.ReadUInt32();
+            reader.Read(BuildId, 0, 0x20);
+            textSection.CompressedSize = reader.ReadUInt32();
+            rodataSection.CompressedSize = reader.ReadUInt32();
+            dataSection.CompressedSize = reader.ReadUInt32();
+            reader.ReadBytes(0x1C); // Padding
+            RodataRelativeExtents = new[]
+            {
+                new RodataRelativeExtent(reader), new RodataRelativeExtent(reader), new RodataRelativeExtent(reader)
+            };
+
+            reader.Read(textSection.Hash, 0, 0x20);
+            reader.Read(rodataSection.Hash, 0, 0x20);
+            reader.Read(dataSection.Hash, 0, 0x20);
+
+            Sections = new[] { textSection, rodataSection, dataSection };
+            reader.Close();
+        }
+
+        public class NsoSection
+        {
+            private SharedStreamSource StreamSource { get; }
+
+            public bool IsCompressed { get; set; }
+            public bool CheckHash { get; set; }
+            public uint FileOffset { get; set; }
+            public uint MemoryOffset { get; set; }
+            public uint DecompressedSize { get; set; }
+            public uint CompressedSize { get; set; }
+
+            public byte[] Hash { get; } = new byte[0x20];
+
+            public NsoSection(SharedStreamSource streamSource)
+            {
+                StreamSource = streamSource;
+            }
+
+            public Stream OpenSection()
+            {
+                return StreamSource.CreateStream(FileOffset, CompressedSize);
+            }
+
+            public byte[] DecompressSection()
+            {
+                byte[] compressed = new byte[CompressedSize];
+                OpenSection().Read(compressed, 0, (int)CompressedSize);
+
+                if (IsCompressed)
+                    return Lz4.Decompress(compressed, (int)DecompressedSize);
+                else
+                    return compressed;
+            }
+
+            internal void ReadSegmentHeader(BinaryReader reader)
+            {
+                FileOffset = reader.ReadUInt32();
+                MemoryOffset = reader.ReadUInt32();
+                DecompressedSize = reader.ReadUInt32();
+            }
+        }
+
+        public class RodataRelativeExtent
+        {
+            public uint RegionRodataOffset { get; }
+            public uint RegionSize { get; }
+
+            public RodataRelativeExtent(BinaryReader reader)
+            {
+                RegionRodataOffset = reader.ReadUInt32();
+                RegionSize = reader.ReadUInt32();
+            }
+        }
+    }
+}