EncodedArg

Dalamud.Bootstrap/Bootstrapper.cs

@@ -46,7 +46,12 @@ namespace Dalamud.Bootstrap
             using var process = Process.Open(pid);
             var commandLine = process.ReadCommandLine();
 
-            var argument = ArgumentDecoder.Decode(commandLine[1]);
+            if (!ArgumentContainer.Parse(commandLine[1], out var container))
+            {
+
+            }
+
+            
             // TODO:
             // .... if arg1 exists
             // DecodeSqexArg(arguments[1]);

Dalamud.Bootstrap/SqexArg/ArgumentContainer.cs

@@ -0,0 +1,40 @@
+using System;
+
+namespace Dalamud.Bootstrap.SqexArg
+{
+    internal sealed class ArgumentContainer
+    {
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="argument"></param>
+        /// <param name="container"></param>
+        /// <returns></returns>
+        public static bool Parse(string argument, out ArgumentContainer? container)
+        {
+            if (argument.Length < 17)
+            {
+                // does not contain: //**sqex003 + payload + checksum + **//
+                container = null;
+                return false;
+            }
+
+            if (!argument.StartsWith("//**sqex003") || !argument.EndsWith("**//"))
+            {
+                container = null;
+                return false;
+            }
+
+            var checksum = argument[^5];
+            var payload = argument[11..^5]
+                .Replace(; // encoded in url-safe variant of base64
+
+            // decode 
+
+            Convert.FromBase64String();
+            container = new ArgumentContainer(payload, checksum);
+
+            return true;
+        }
+    }
+}

Dalamud.Bootstrap/SqexArg/ArgumentDecoder.cs

@@ -1,47 +0,0 @@
-using System;
-
-namespace Dalamud.Bootstrap.SqexArg
-{
-    internal static class ArgumentDecoder
-    {
-        public static ArgumentBuilder Decode(ReadOnlySpan<char> argument, uint key)
-        {
-            // 1. strip //**sqex003 and **//
-            // 2. extract checksum
-            // 3. deduce upper nibble key
-            // 4. 
-
-            // //**c**//
-            if (argument.Length <= 9)
-            {
-                throw new ArgumentException(nameof(argument));
-            }
-
-            if (!argument.StartsWith("//**") || !argument.EndsWith("**//"))
-            {
-                throw new ArgumentException(nameof(argument));
-            }
-
-            var payload = argument[4..^5];
-            var checksum = argument[^5];
-
-            // undo url safe
-            //payload.re
-
-            
-            
-            // stuff
-            throw new NotImplementedException("TODO");
-        }
-
-        private static void DecodeUrlSafeBase64(ReadOnlySpan<char> content)
-        {
-            var buffer = new byte[(content.Length / 3) * 4];
-            if (!Convert.TryFromBase64Chars(payload, buffer, out var _))
-            {
-                // TODO
-            }
-        }
-
-    }
-}