From 88f72a3527d84ef71895b5845bb092b7fa72a429 Mon Sep 17 00:00:00 2001
From: Alex Barney <thealexbarney@gmail.com>
Date: Fri, 22 Jun 2018 21:02:19 -0500
Subject: [PATCH] Barebones cnmt reading

---
 hactoolnet/Program.cs | 18 ++++++++--
 libhac/Cnmt.cs        | 82 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 97 insertions(+), 3 deletions(-)
 create mode 100644 libhac/Cnmt.cs

diff --git a/hactoolnet/Program.cs b/hactoolnet/Program.cs
index 0c3d477d..f9072f9e 100644
--- a/hactoolnet/Program.cs
+++ b/hactoolnet/Program.cs
@@ -59,7 +59,7 @@ namespace hactoolnet
             var sdfs = new SdFs(keyset, args[2]);
             var ncas = sdfs.ReadAllNca().ToArray();
 
-            var metadata = new List<byte[]>();
+            var metadata = new List<Cnmt>();
 
             using (var progress = new ProgressBar())
             {
@@ -76,12 +76,24 @@ namespace hactoolnet
                             var path = Path.Combine("meta", entry.Name);
                             Directory.CreateDirectory(Path.GetDirectoryName(path));
                             var file = pfs0.GetFile(entry.Index);
-                            metadata.Add(file);
+
+                            metadata.Add(new Cnmt(new MemoryStream(file)));
                             File.WriteAllBytes(path, file);
-                            progress.LogMessage(path);
                         }
                     }
                 }
+
+                foreach (var meta in metadata.OrderBy(x => x.TitleId))
+                {
+                    progress.LogMessage($"{meta.TitleId:X16} v{meta.TitleVersion} {meta.Type}");
+
+                    foreach (var content in meta.ContentEntries)
+                    {
+                        // Add an actual hexdump function
+                        progress.LogMessage($"    {BitConverter.ToString(content.NcaId).Replace("-", "")}.nca {content.Type}");
+                    }
+                    progress.LogMessage("");
+                }
             }
         }
     }
diff --git a/libhac/Cnmt.cs b/libhac/Cnmt.cs
new file mode 100644
index 00000000..050a778b
--- /dev/null
+++ b/libhac/Cnmt.cs
@@ -0,0 +1,82 @@
+using System.IO;
+
+namespace libhac
+{
+    public class Cnmt
+    {
+        public ulong TitleId { get; set; }
+        public uint TitleVersion { get; set; }
+        public TitleType Type { get; set; }
+        public byte FieldD { get; set; }
+        public int TableOffset { get; set; }
+        public int ContentEntryCount { get; set; }
+        public int MetaEntryCount { get; set; }
+
+        public CnmtContentEntry[] ContentEntries { get; set; }
+
+        public Cnmt(Stream file)
+        {
+            using (var reader = new BinaryReader(file))
+            {
+                TitleId = reader.ReadUInt64();
+                TitleVersion = reader.ReadUInt32();
+                Type = (TitleType)reader.ReadByte();
+                FieldD = reader.ReadByte();
+                TableOffset = reader.ReadUInt16();
+                ContentEntryCount = reader.ReadUInt16();
+                MetaEntryCount = reader.ReadUInt16();
+                file.Position += 12;
+                file.Position += TableOffset;
+
+                ContentEntries = new CnmtContentEntry[ContentEntryCount];
+
+                for (int i = 0; i < ContentEntryCount; i++)
+                {
+                    ContentEntries[i] = new CnmtContentEntry(reader);
+                }
+            }
+        }
+    }
+
+    public class CnmtContentEntry
+    {
+        public byte[] Hash { get; set; }
+        public byte[] NcaId { get; set; }
+        public long Size { get; set; }
+        public CnmtContentType Type { get; set; }
+
+        public CnmtContentEntry(BinaryReader reader)
+        {
+            Hash = reader.ReadBytes(0x20);
+            NcaId = reader.ReadBytes(0x10);
+            Size = reader.ReadUInt32();
+            Size |= ((long)reader.ReadUInt16() << 32);
+            Type = (CnmtContentType)reader.ReadByte();
+            reader.BaseStream.Position += 1;
+        }
+    }
+
+    public enum CnmtContentType
+    {
+        Meta,
+        Program,
+        Data,
+        Control,
+        OfflineManualHtml,
+        LegalHtml,
+        UpdatePatch
+    }
+
+    public enum TitleType
+    {
+        SystemProgram = 1,
+        SystemDataArchive,
+        SystemUpdate,
+        FirmwarePackageA,
+        FirmwarePackageB,
+        RegularApplication = 0x80,
+        UpdateTitle,
+        AddOnContent,
+        DeltaTitle
+    }
+}