wip

Dalamud.Bootstrap/Bootstrapper.cs

@@ -19,6 +19,8 @@ namespace Dalamud.Bootstrap
 
         public void Launch(string exePath, string? commandLine)
         {
+            commandLine = commandLine ?? "";
+
             throw new NotImplementedException("TODO");
         }
 
@@ -46,7 +48,7 @@ namespace Dalamud.Bootstrap
             using var process = Process.Open(pid);
             var commandLine = process.ReadCommandLine();
 
-            if (!ArgumentContainer.Parse(commandLine[1], out var container))
+            if (!EncodedArgument.Parse(commandLine[1], out var container))
             {
 
             }

Dalamud.Bootstrap/Crypto/Blowfish.cs

@@ -4,7 +4,7 @@ using System.Runtime.CompilerServices;
 
 namespace Dalamud.Bootstrap.Crypto
 {
-    internal unsafe partial struct BlowfishState
+    internal unsafe struct BlowfishState
     {
         // References:
         // https://www.schneier.com/academic/archives/1994/09/description_of_a_new.html
@@ -171,14 +171,9 @@ namespace Dalamud.Bootstrap.Crypto
         private fixed uint m_s1[SSize];
         private fixed uint m_s2[SSize];
         private fixed uint m_s3[SSize];
-    }
 
-    internal unsafe partial struct BlowfishState
-    {
         public BlowfishState(ReadOnlySpan<byte> key)
         {
-            CheckKeyLength(key);
-
             // initializes P-array and S-boxes to initial values.
             fixed (uint* pSrc = PInit)
             fixed (uint* pDst = m_p)
@@ -213,15 +208,15 @@ namespace Dalamud.Bootstrap.Crypto
             InitKey(key);
         }
 
-        private void CheckKeyLength(ReadOnlySpan<byte> key)
+        // private void CheckKeyLength(ReadOnlySpan<byte> key)
-        {
+        // {
-            // Supported key sizes: 32–448 bits
+        //     // Supported key sizes: 32–448 bits
-            // https://en.wikipedia.org/wiki/Blowfish_(cipher)#The_algorithm
+        //     // https://en.wikipedia.org/wiki/Blowfish_(cipher)#The_algorithm
-            if (key.Length < 4 || key.Length > 56)
+        //     if (key.Length < 4 || key.Length > 56)
-            {
+        //     {
-                throw new ArgumentException("Key length must be between from 32 to 448 bits.", nameof(key));
+        //         throw new ArgumentException("Key length must be between from 32 to 448 bits.", nameof(key));
-            }
+        //     }
-        }
+        // }
 
         /// <summary>
         /// Encrypts a block.
@@ -363,13 +358,10 @@ namespace Dalamud.Bootstrap.Crypto
         }
     }
 
-    internal sealed partial class Blowfish
+    internal sealed class Blowfish
     {
         private BlowfishState m_state;
-    }
+        
-
-    internal sealed partial class Blowfish
-    {
         /// <summary>
         /// Initializes a new instance of the Blowfish class.
         /// </summary>

Dalamud.Bootstrap/SqexArg/ArgumentContainer.cs

@@ -1,40 +0,0 @@
-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];
-
-            // decode 
-
-            //Convert.FromBase64String();
-            //container = new ArgumentContainer(payload, checksum);
-
-            container = null;
-            return true;
-        }
-    }
-}

Dalamud.Bootstrap/SqexArg/EncodedArgument.cs

@@ -0,0 +1,87 @@
+using System;
+using System.Buffers;
+using System.Buffers.Text;
+using System.Runtime.InteropServices;
+using System.Text;
+using Dalamud.Bootstrap.Crypto;
+
+namespace Dalamud.Bootstrap.SqexArg
+{
+    internal sealed class EncodedArgument
+    {
+        private static char[] ChecksumTable = new char[]
+        {
+            'f', 'X', '1', 'p', 'G', 't', 'd', 'S',
+            '5', 'C', 'A', 'P', '4', '_', 'V', 'L'
+        };
+
+        private readonly ReadOnlyMemory<byte> m_data;
+
+        private readonly uint m_key;
+
+        //private readonly Blowfish m_cachedBlowfish;
+
+        public EncodedArgument(ReadOnlyMemory<byte> data, uint key)
+        {
+            m_data = data;
+            m_key = key;
+        }
+
+        public static bool TryParse(string argument, out EncodedArgument? value)
+        {
+            if (argument.Length <= 17)
+            {
+                // does not contain: //**sqex0003 + payload + checksum + **//
+                value = null;
+                return false;
+            }
+
+            if (!argument.StartsWith("//**sqex0003") || !argument.EndsWith("**//"))
+            {
+                value = null;
+                return false;
+            }
+
+            var checksum = argument[^5];
+            var payload = DecodeUrlSafeBase64(argument.Substring(12, argument.Length - 1 - 12 - 4)); // //**sqex0003, checksum, **//
+
+            if (!FindPartialKey(checksum, out var partialKey))
+            {
+                value = null;
+                return false;
+            }
+
+            for (var i = 0u; i <= 0xFFF; i++)
+            {
+                var key = (i << 20) | partialKey;
+            }
+        }
+
+        private static bool FindPartialKey(char checksum, out uint recoveredKey)
+        {
+            var index = MemoryExtensions.IndexOf(ChecksumTable, checksum);
+            
+            if (index < 0)
+            {
+                recoveredKey = 0;
+                return false;
+            }
+
+            recoveredKey = (uint) (index << 16);
+            return true;
+        }
+        
+        /// <summary>
+        /// Converts url safe variant of base64 string to bytes.
+        /// </summary>
+        /// <param name="payload">A url-safe variant of base64 string.</param>
+        private static byte[] DecodeUrlSafeBase64(string payload)
+        {
+            var base64Str = payload
+                .Replace('-', '+')
+                .Replace('_', '/');
+            
+            return Convert.FromBase64String(base64Str);
+        }
+    }
+}

build/DalamudBuild.cs

@@ -35,6 +35,8 @@ class DalamudBuild : NukeBuild
 
     AbsolutePath OutputDirectory => RootDirectory / "output";
 
+    //AbsolutePath DefaultDalamudRoot => 
+
     Target Clean => _ => _
         .Before(Restore)
         .Executes(() =>
@@ -59,7 +61,7 @@ class DalamudBuild : NukeBuild
                 .SetAssemblyVersion(GitVersion.AssemblySemVer)
                 .SetFileVersion(GitVersion.AssemblySemFileVer)
                 .SetInformationalVersion(GitVersion.InformationalVersion)
-                /*.EnableNoRestore()*/);
+                .EnableNoRestore());
         });
 
     Target Install => _ => _
@@ -67,5 +69,6 @@ class DalamudBuild : NukeBuild
         .Executes(() =>
         {
             // TODO
+            Direct
         });
 }