diff --git a/NDecrypt/N3DS/CIATool.cs b/NDecrypt/N3DS/CIATool.cs
new file mode 100644
index 0000000..61e6f2d
--- /dev/null
+++ b/NDecrypt/N3DS/CIATool.cs
@@ -0,0 +1,80 @@
+using System;
+using System.IO;
+using NDecrypt.N3DS.Headers;
+
+namespace NDecrypt.N3DS
+{
+    // https://www.3dbrew.org/wiki/CIA
+    internal class CIATool : ITool
+    {
+        /// <summary>
+        /// Name of the input CIA file
+        /// </summary>
+        private readonly string filename;
+
+        /// <summary>
+        /// Flag to detrmine if development keys should be used
+        /// </summary>
+        private readonly bool development;
+
+        /// <summary>
+        /// Flag to determine if encrypting or decrypting
+        /// </summary>
+        private readonly bool encrypt;
+
+        /// <summary>
+        /// Flag to determine if forcing operations
+        /// </summary>
+        private readonly bool force;
+
+        public CIATool(string filename, bool development, bool encrypt, bool force)
+        {
+            this.filename = filename;
+            this.development = development;
+            this.encrypt = encrypt;
+            this.force = force;
+        }
+
+        #region Common Methods
+
+        /// <summary>
+        /// Process an input file given the input values
+        /// </summary>
+        public bool ProcessFile()
+        {
+            // Ensure the constants are all set
+            Constants.Init();
+            if (Constants.IsReady != true)
+            {
+                Console.WriteLine("Could not read keys from keys.bin. Please make sure the file exists and try again.");
+                return false;
+            }
+
+            try
+            {
+                // Open the read and write on the same file for inplace processing
+                using (BinaryReader reader = new BinaryReader(File.Open(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)))
+                using (BinaryWriter writer = new BinaryWriter(File.Open(filename, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite)))
+                {
+                    CIAHeader header = CIAHeader.Read(reader);
+                    if (header == null)
+                    {
+                        Console.WriteLine("Error: Not a 3DS Rom!");
+                        return false;
+                    }
+
+                    // TODO: Implement CIA encrypt/decrypt
+                    return false;
+                }
+            }
+            catch
+            {
+                Console.WriteLine($"An error has occurred. {filename} may be corrupted if it was partially processed.");
+                Console.WriteLine("Please check that the file was a valid 3DS or New 3DS file and try again.");
+                return false;
+            }
+        }
+
+        #endregion
+    }
+}
\ No newline at end of file
diff --git a/NDecrypt/N3DS/Headers/CIAHeader.cs b/NDecrypt/N3DS/Headers/CIAHeader.cs
new file mode 100644
index 0000000..748585a
--- /dev/null
+++ b/NDecrypt/N3DS/Headers/CIAHeader.cs
@@ -0,0 +1,114 @@
+using System.IO;
+
+namespace NDecrypt.N3DS.Headers
+{
+    internal class CIAHeader
+    {
+        /// <summary>
+        /// Archive header size, usually 0x2020 bytes
+        /// </summary>
+        public uint HeaderSize { get; private set; }
+
+        /// <summary>
+        /// Type
+        /// </summary>
+        public ushort Type { get; private set; }
+
+        /// <summary>
+        /// Version
+        /// </summary>
+        public ushort Version { get; private set; }
+
+        /// <summary>
+        /// Certificate chain size
+        /// </summary>
+        public int CertificateChainSize { get; private set; }
+
+        /// <summary>
+        /// Ticket size
+        /// </summary>
+        public int TicketSize { get; private set; }
+
+        /// <summary>
+        /// TMD file size
+        /// </summary>
+        public int TMDFileSize { get; private set; }
+
+        /// <summary>
+        /// Meta size (0 if no Meta data is present)
+        /// </summary>
+        public int MetaSize { get; private set; }
+
+        /// <summary>
+        /// Content size
+        /// </summary>
+        public long ContentSize { get; private set; }
+
+        /// <summary>
+        /// Content Index
+        /// </summary>
+        public byte[] ContentIndex { get; private set; }
+
+        /// <summary>
+        /// Certificate chain
+        /// </summary>
+        public byte[] CertificateChain { get; set; }
+
+        /// <summary>
+        /// Ticket
+        /// </summary>
+        public byte[] Ticket { get; set; }
+
+        /// <summary>
+        /// TMD file data
+        /// </summary>
+        public byte[] TMDFileData { get; set; }
+
+        /// <summary>
+        /// Content file data
+        /// </summary>
+        public byte[] ContentFileData { get; set; }
+
+        /// <summary>
+        /// Meta file data (Not a necessary component)
+        /// </summary>
+        public MetaFile MetaFileData { get; set; }
+
+        /// <summary>
+        /// Read from a stream and get a CIA header, if possible
+        /// </summary>
+        /// <param name="reader">BinaryReader representing the input stream</param>
+        /// <returns>CIA header object, null on error</returns>
+        public static CIAHeader Read(BinaryReader reader)
+        {
+            CIAHeader header = new CIAHeader();
+
+            try
+            {
+                header.HeaderSize = reader.ReadUInt32();
+                header.Type = reader.ReadUInt16();
+                header.Version = reader.ReadUInt16();
+                header.CertificateChainSize = reader.ReadInt32();
+                header.TicketSize = reader.ReadInt32();
+                header.TMDFileSize = reader.ReadInt32();
+                header.MetaSize = reader.ReadInt32();
+                header.ContentSize = reader.ReadInt64();
+                header.ContentIndex = reader.ReadBytes(0x2000);
+
+                header.CertificateChain = reader.ReadBytes(header.CertificateChainSize);
+                header.Ticket = reader.ReadBytes(header.TicketSize);
+                header.TMDFileData = reader.ReadBytes(header.TMDFileSize);
+                header.ContentFileData = reader.ReadBytes((int)header.ContentSize);
+                
+                if (header.MetaSize > 0)
+                    header.MetaFileData = MetaFile.Read(reader);
+
+                return header;
+            }
+            catch
+            {
+                return null;
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/NDecrypt/N3DS/Headers/MetaFile.cs b/NDecrypt/N3DS/Headers/MetaFile.cs
new file mode 100644
index 0000000..8625550
--- /dev/null
+++ b/NDecrypt/N3DS/Headers/MetaFile.cs
@@ -0,0 +1,57 @@
+using System.IO;
+
+namespace NDecrypt.N3DS.Headers
+{
+    internal class MetaFile
+    {
+        /// <summary>
+        /// Title ID dependency list - Taken from the application's ExHeader
+        /// </summary>
+        public byte[] TitleIDDependencyList { get; private set; }
+
+        /// <summary>
+        /// Reserved
+        /// </summary>
+        public byte[] Reserved1 { get; private set; }
+
+        /// <summary>
+        /// Core Version
+        /// </summary>
+        public uint CoreVersion { get; private set; }
+
+        /// <summary>
+        /// Reserved
+        /// </summary>
+        public byte[] Reserved2 { get; private set; }
+
+        /// <summary>
+        /// Icon Data(.ICN) - Taken from the application's ExeFS
+        /// </summary>
+        public byte[] IconData { get; private set; }
+
+        /// <summary>
+        /// Read from a stream and get the Metafile data, if possible
+        /// </summary>
+        /// <param name="reader">BinaryReader representing the input stream</param>
+        /// <returns>Metafile data object, null on error</returns>
+        public static MetaFile Read(BinaryReader reader)
+        {
+            MetaFile metaFile = new MetaFile();
+
+            try
+            {
+                metaFile.TitleIDDependencyList = reader.ReadBytes(0x180);
+                metaFile.Reserved1 = reader.ReadBytes(0x180);
+                metaFile.CoreVersion = reader.ReadUInt32();
+                metaFile.Reserved2 = reader.ReadBytes(0xFC);
+                metaFile.IconData = reader.ReadBytes(0x36C0);
+
+                return metaFile;
+            }
+            catch
+            {
+                return null;
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/NDecrypt/Program.cs b/NDecrypt/Program.cs
index eabb6b2..ec847c2 100644
--- a/NDecrypt/Program.cs
+++ b/NDecrypt/Program.cs
@@ -18,6 +18,7 @@ namespace NDecrypt
             iQueDS,
             N3DS,
             iQue3DS,
+            N3DSCIA,
         }
 
         public static void Main(string[] args)
@@ -139,6 +140,9 @@ More than one path can be specified at a time.");
                 case FileType.N3DS:
                     Console.WriteLine("File recognized as Nintendo 3DS");
                     return new ThreeDSTool(filename, development, encrypt, force);
+                // case FileType.N3DSCIA:
+                //     Console.WriteLine("File recognized as Nintendo 3DS");
+                //     return new CIATool(filename, development, encrypt, force);
                 case FileType.NULL:
                 default:
                     Console.WriteLine($"Unrecognized file format for {filename}. Expected *.nds, *.srl, *.dsi, *.3ds");
@@ -165,6 +169,9 @@ More than one path can be specified at a time.");
 
             else if (filename.EndsWith(".3ds", StringComparison.OrdinalIgnoreCase))
                 return FileType.N3DS;
+            
+            else if (filename.EndsWith(".cia", StringComparison.OrdinalIgnoreCase))
+                return FileType.N3DSCIA;
 
             return FileType.NULL;
         }