libra_eorzea_dumper.cs

using System;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Net;
using Newtonsoft.Json;
using System.IO;
using System.IO.Compression;

namespace eorzeadb_noncegen
{
    class Program
    {
        static void Main( string[] args )
        {
            var dt = DateTimeOffset.Now.ToUnixTimeSeconds();
            var nonce = new byte[] { 48, 102, 54, 51, 54, 50, 98, 52, 53, 48, 49, 52, 101, 53, 99, 55, 49, 98, 100, 57, 48, 48, 98, 57, 98, 57, 98, 52, 48, 52, 50, 55, 98, 57, 49, 55, 101, 98, 97, 49 };
            var apikey = "858dd61895a851c365513a27e9ac80cf143957c6";

            var ba = Encoding.ASCII.GetBytes( apikey + dt ).Concat( nonce ).ToArray();

            string response = string.Empty;

            using ( var sha1 = new SHA1Managed() )
            {
                var hash = sha1.ComputeHash( ba );
                var sb = new StringBuilder( hash.Length * 2 );

                foreach ( byte b in hash )
                    sb.Append( b.ToString( "x2" ) );

                var url = $"https://login.finalfantasyxiv.com/lodestone/api/data/app_data?apikey={apikey}&timestamp={dt}&nonce={sb.ToString()}&type=android";

                using ( var wc = new WebClient() )
                {
                    response = wc.DownloadString( url );
                }
            }

            dynamic respData = JsonConvert.DeserializeObject( response );

            Console.WriteLine( $"got response url: {respData.data.uri}" );
            Console.WriteLine( $"downloading file..." );

            byte[] fileBytes;
            using ( var wc = new WebClient() )
            {
                fileBytes = wc.DownloadData( respData.data.uri.ToString() );
            }

            Console.WriteLine( "decrypting..." );

            var IV = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
            var key = "1c9e4e3aac2e4327825ac30694333db9";

            using ( var rm = new RijndaelManaged() )
            {
                rm.Key = Encoding.ASCII.GetBytes( key );
                rm.IV = IV;

                var decryptor = rm.CreateDecryptor();

                using ( var ms = new MemoryStream( fileBytes ) )
                using ( var cs = new CryptoStream( ms, decryptor, CryptoStreamMode.Read ) )
                {
                    using ( var za = new ZipArchive( cs ) )
                    {
                        foreach ( var e in za.Entries )
                        {
                            Console.WriteLine( $"writing file {e.FullName}" );
                            using ( var fs = File.Create( e.FullName ) )
                            using ( var s = e.Open() )
                            {
                                int data;
                                while ( ( data = s.ReadByte() ) != -1 )
                                    fs.WriteByte( ( byte )data );
                            }
                        }
                    }
                }
            }
        }
    }
}