hactoolnet: Add NPDM converter

README.md

@@ -55,6 +55,8 @@ NCA options:
   --romfsdir <dir>     Specify RomFS directory path.
   --listromfs          List files in RomFS.
   --basenca            Set Base NCA to use with update partitions.
+NPDM options:
+  --json <file>        Specify file path for saving JSON representation of program permissions to.
 KIP1 options:
   --uncompressed <f>   Specify file path for saving uncompressed KIP1.
 RomFS options:

src/hactoolnet/CliParser.cs

@@ -68,6 +68,7 @@ private static CliOption[] GetCliOptions() => new[]
         new CliOption("title", 1, (o, a) => o.TitleId = ParseTitleId(o, a[0])),
         new CliOption("bench", 1, (o, a) => o.BenchType = a[0]),
         new CliOption("cpufreq", 1, (o, a) => o.CpuFrequencyGhz = ParseDouble(o, a[0])),
+        new CliOption("json", 1, (o, a) => o.JsonFile = a[0]),
 
         new CliOption("replacefile", 2, (o, a) =>
         {
@@ -190,6 +191,7 @@ private static FileType ParseFileType(Options options, string input)
             case "ini1": return FileType.Ini1;
             case "ndv0": return FileType.Ndv0;
             case "bench": return FileType.Bench;
+            case "npdm": return FileType.Npdm;
         }
 
         options.ParseErrorMessage ??= "Specified type is invalid.";
@@ -274,6 +276,8 @@ private static string GetUsage()
         sb.AppendLine("  --romfsdir <dir>     Specify RomFS directory path.");
         sb.AppendLine("  --listromfs          List files in RomFS.");
         sb.AppendLine("  --basenca            Set Base NCA to use with update partitions.");
+        sb.AppendLine("NPDM options:");
+        sb.AppendLine("  --json <file>        Specify file path for saving JSON representation of program permissions to.");
         sb.AppendLine("KIP1 options:");
         sb.AppendLine("  --uncompressed <f>   Specify file path for saving uncompressed KIP1.");
         sb.AppendLine("RomFS options:");
@@ -370,4 +374,4 @@ public CliOption(string longName, int argsNeeded, Action<Options, string[]> assi
         public int ArgsNeeded { get; }
         public Action<Options, string[]> Assigner { get; }
     }
-}
+}

src/hactoolnet/Options.cs

@@ -63,6 +63,7 @@ internal class Options
     public ulong TitleId;
     public string BenchType;
     public double CpuFrequencyGhz;
+    public string JsonFile;
 
     public string ParseErrorMessage;
     public bool IsParseSuccessful;
@@ -99,7 +100,8 @@ internal enum FileType
     Kip1,
     Ini1,
     Ndv0,
-    Bench
+    Bench,
+    Npdm
 }
 
 internal class Context

src/hactoolnet/ProcessNpdm.cs

@@ -0,0 +1,27 @@
+using System.IO;
+using System.Text.Json;
+using LibHac.FsSystem;
+using LibHac.Tools.FsSystem;
+using LibHac.Tools.Npdm;
+
+namespace hactoolnet;
+
+internal static class ProcessNpdm
+{
+    public static void Process(Context ctx)
+    {
+        using (var file = new LocalStorage(ctx.Options.InFile, FileAccess.Read))
+        {
+            var npdm = new NpdmBinary(file.AsStream(), ctx.KeySet);
+
+            if(ctx.Options.JsonFile != null)
+            {
+                string json = JsonSerializer.Serialize(npdm, new JsonSerializerOptions
+                {
+                    WriteIndented = true
+                });
+                File.WriteAllText(ctx.Options.JsonFile, json);
+            }
+        }
+    }
+}

src/hactoolnet/Program.cs

@@ -182,6 +182,9 @@ private static void RunTask(Context ctx)
             case FileType.Bench:
                 ProcessBench.Process(ctx);
                 break;
+            case FileType.Npdm:
+                ProcessNpdm.Process(ctx);
+                break;
             default:
                 throw new ArgumentOutOfRangeException();
         }