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Dark-Souls-II-Archive-Dump

A partial dump of the encrypted game archives (PC Version 1.0.7) for those that are interested in examining the game assets.

This repository should contain all the files that are required to load a savegame at the Majula bonfire. Most of the files are stored in the following archives (Some files aren't packed and can be found in the sub-directories of the /Game/ directory):

  • GameDataEbl
  • HqChrEbl
  • HqMapEbl
  • HqObjEbl
  • HqPartsEbl

The following archive file formats are used:

Name Description
.anibnd Animation archive
.bdt General purpose archive (headerless)
.bhd General purpose archive header
.bnd General purpose archive
.commonbnd General purpose archive
.dclbnd Decal archive
.dcx Compressed file archive
.envbnd Map environment archive
.febnd Frontend archive
.fetexbnd Frontend texture archive
.ffxbnd SFX archive
.fltbnd Filter archive
.fontbnd Font archive
.gibhd Model archive header
.hkxbhd Havok Engine archive header
.mapbhd Map archive header
.texbnd Texture archive
.tpfbdt Texture archive (headerless)
.tpfbhd Texture archive header

The following file formats are used in the archives:

Name Description
.acb Unknown (Map model/texture related)
.bin Word filter
.bmp Bitmap
.breakobj Destructible map objects
.btao Unknown (Map/Light related)
.btl Unknown (Map related)
.btof Unknown (Map/Light related)
.btpb Unknown (Map/Point could related)
.btpo Unknown (Map/Light related)
.ccm Font glyph definition file (sans the font bitmap)
.clm Unknown (Cloth related)
.ctl FaceGen Control
.dds Direct Draw Surface
.egt FaceGen Statistical Texture
.emevd Special effect table
.esd AI state machine
.fev Audio
.fltparam Filter settings
.flvpwv Unknown (Model related)
.fmg String table
.fpo Fragment shader
.fsb Sound
.fxo HLSLShader
.hkt Unknown (Havok/Model related)
.hkx Unknown (Havok related)
.hkxpwv Unknown (Havok related)
.ini Settings
.itl Sound
.list Map id and name table
.msb Map layout
.mtd Material
.mte Unknown (Map related)
.mte Unknown (Model related)
.ngp Unknown (Map related)
.nmb Unknown (Animation related)
.nsa Animation
.param General purpose lookup-table
.pem RSA public key container
.pfbbin Unknown (Model related)
.pxt Unknown (Texture related)
.sib Unknown (Model related)
.sfxparam Sound settings
.tae Animation listings and events
.tga Truevision TGA
.tpf Texture
.vpo Vertex shader
.vsd Voice synchronization
.xml Shader information
.xpu GUI HLSL Shader
.xvu GUI HLSL Shader

Additional notes

There are 3 file formats that are used for many purposes.

  • BND4 or Binder 4 is the most used archive format. It contains a table of all the files that it contains, their ASCII or UNICODE file names and sometimes even the full path from when they were packed.
  • PARAM is a game archive that is is used to store easy accessible settings for many aspects of the game. Each map has its own set of param files that contain information about events, spawnpoints and objects. Most param files are stored in the file regulation.bnd. This file contains the so called calibrations (i.a. the stats of items, enemies and NPCs). It can be found in the /Game/ directory and is encrypted with AES-128. Each PARAM file consists of a lookup-table and a set of values of the same size. The size of each value depends on which param type is used (Each file contains the name of the type in its header).
  • DCX is a format that is used to contain compressed data. e.g. the DEFLATE algorithm is used to compress the aforementioned calibration file. Judging from the DFLT signature in the header of each file it could be possible that other compression algorithms can be used.

In Dark Souls II each map has its own id. Majula for example has the id 10040000. FROM formats the map id like this mXX_XX_XX_XX. That means e.g. that files that are related to Majula have m10_04_00_00 in their name. Valid map ids can be found in WorldMapList.list or MapName.fmg.

Encryption

Regulation

   
Encryption AES-128 CTR
Key 40178130DF0A94543309E171ECBF254C
IV 80B41AAA156D20001435434E00000001 (Valid for calibration 1.0.13

Savegames

   
Encryption AES-128 CBC
Key B7FD463E4A9C1102DF1739E5F3B2A50F
IV First 16 bytes in the USER_DATA000-USER_DATA022 files
Checksum Second 16 bytes in the USER_DATA000-USER_DATA022 files (Unknown algorithm)

Savegames SotFS

   
Encryption Unknown
Key Unknown
IV First 16 bytes in the USER_DATA000-USER_DATA022 files
Checksum Second 16 bytes in the USER_DATA000-USER_DATA022 files (Unknown algorithm)

Archive headers

   
Encryption RSA 2048
Key Public keys are stored in PKCS#1 PEM files
Remarks The game uses OpenSSL and Eric Young's PKCS#1 RSA_eay_public_decrypt function

Archive data

   
Encryption AES-128 ECB
Key Keys are stored in the header file
Hash SHA-256
Salt Stored in the header file (e.g. FRPG2_STEAM_GAME_DATA_EBL_SALT for GameDataEbl.bhd)

Hashing

File name hash algorithm

  1. Remove the prefix
  2. Find the first occurrence of ':' * Abort if no ':' was found * Continue with the substring after ':'
  3. Initialize the hash with 0
  4. Iterate through the substring
  5. If the character is uppercase then convert it to lowercase
  6. If the character is '' then replace it with '/'
  7. Multiply the hash with 37
  8. Add the numeric representation of the character to the hash

File name hash example

File name Archive Hash
map:/param/GeneratorParam_m10_02_00_00.param GameDataEbl 2779221649