2 files changed, 63 insertions, 1 deletions
diff --git a/Ryujinx.HLE/Utilities/FontUtils.cs b/Ryujinx.HLE/Utilities/FontUtils.cs
new file mode 100644
index 00000000..efe7560c
--- /dev/null
+++ b/Ryujinx.HLE/Utilities/FontUtils.cs
@@ -0,0 +1,37 @@
+using System.IO;
+
+namespace Ryujinx.HLE.Utilities
+{
+    public static class FontUtils
+    {
+        private static readonly uint FontKey = 0x06186249;
+
+        public static byte[] DecryptFont(Stream BFTTFStream)
+        {
+            uint KXor(uint In) => In ^ 0x06186249;
+
+            using (BinaryReader Reader = new BinaryReader(BFTTFStream))
+            {
+                using (MemoryStream TTFStream = new MemoryStream())
+                {
+                    using (BinaryWriter Output = new BinaryWriter(TTFStream))
+                    {
+                        if (KXor(Reader.ReadUInt32()) != 0x18029a7f)
+                        {
+                            throw new InvalidDataException("Error: Input file is not in BFTTF format!");
+                        }
+
+                        BFTTFStream.Position += 4;
+
+                        for (int i = 0; i < (BFTTFStream.Length - 8) / 4; i++)
+                        {
+                            Output.Write(KXor(Reader.ReadUInt32()));
+                        }
+
+                        return TTFStream.ToArray();
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/Ryujinx.HLE/Utilities/StringUtils.cs b/Ryujinx.HLE/Utilities/StringUtils.cs
index e8d6550a..a10273ee 100644
--- a/Ryujinx.HLE/Utilities/StringUtils.cs
+++ b/Ryujinx.HLE/Utilities/StringUtils.cs
@@ -1,5 +1,7 @@
-using System;
+using Ryujinx.HLE.HOS;
+using System;
 using System.Globalization;
+using System.IO;
 using System.Linq;
 using System.Text;
 
@@ -47,5 +49,28 @@ namespace Ryujinx.HLE.Utilities
 
             return Output;
         }
+
+        public static string ReadUtf8String(ServiceCtx Context, int Index = 0)
+        {
+            long Position = Context.Request.PtrBuff[Index].Position;
+            long Size     = Context.Request.PtrBuff[Index].Size;
+
+            using (MemoryStream MS = new MemoryStream())
+            {
+                while (Size-- > 0)
+                {
+                    byte Value = Context.Memory.ReadByte(Position++);
+
+                    if (Value == 0)
+                    {
+                        break;
+                    }
+
+                    MS.WriteByte(Value);
+                }
+
+                return Encoding.UTF8.GetString(MS.ToArray());
+            }
+        }
     }
 }