Table-Blocks can be decrypted by random access using only their multiple-of-512 block index and the the UserKey. Table-Blocks and Data-Blocks are encrypted differently using the same UserKey. sai file will be referred to as the UserKey since this is the only symmetrical key used to decrypt and encrypt files generated by the end-ser. Different files related to Sai use different static keys. Return (BlockIndex & 0x1FF) ? true: false Īll blocks are encrypted and decrypted symmetrically using a simple exclusive-or-based encryption which refers to a static atlas of 256 32-bit integers which can be found at the end of this text. Return (BlockIndex & 0x1FF) ? false: true īool IsDataBlock(std:: size_t BlockIndex) Demonstrating how to quickly determine if a block Index is a data-block or a table-block bool IsTableBlock(std:: size_t BlockIndex) Std:: size_t NearestTable(std:: size_t BlockIndex) Gets the Table-Block index appropriate for the current block index Every other block that is not a Table-Block is a Data-Block: ![]() Every block index that is a multiple of 512( 0, 512, 1024, etc) is a Table-Block containing meta-data about the block itself and the 511 blocks after it. sai documents and very partially show related information for the other files.Īn individual block in a. This document will mostly cover the method used for sai's user created. It's been found that some preliminary files such as thumbnails and the archive responsible for swatches/palettes use a different decryption key, block size, and Table-Block location. The file itself is encrypted in ECB blocks in which any randomly accessed block can be decrypted by also decrypting the appropriate Table-Block and accessing its 32-bit key found within. Each layer, mask, and related meta data is stored in an individual pseudo-file which also has a layer of block-level encryption. sai file among with other files such as thumbnails, the sai.ssd file and others is but an archive containing a file-system-like structure once decrypted. sai as its document format for storing both raster and vector layers as well as other canvas related meta-data. Data protection function to avoid abnormal termination such as bugs.Ĭopyright 1996-2016 SYSTEMAX Software Development Decryption.Simple but powerful user interface, easy to learn.Highly accurate composition with 16bit ARGB channels.PaintTool SAI is high quality and lightweight painting software, fully digitizer support, amazing anti-aliased paintings, provide easy and stable operation, this software make digital art more enjoyable and comfortable. This document assumes you have some knowledge of the C and C++ syntax as the data structures and algorithms here will be presented in the form of C and C++ structures and subroutines. Previous work includes my now-abandoned run-time exploitation framework SaiPal and the more recent Windows explorer thumbnail extension SaiThumbs. If you find anything in this document to be misleading, incomplete, or flat-out incorrect feel free to shoot me an email at Wunkolo (at). sai files or just to get a comprehensive understanding of the decisions that SYSTEMAX has chosen to make for their file format. This document is more directed at anyone that wants to implement their own library to read or interface with. sai file format used to archive a user's artwork and the layers of abstraction implemented by SYSTEMAX for extracting this data outside of the context of the original software. This write-up in particular is focused on the technical specifications of the user-created. If you need more specifics, please ask.This document represents about a year and a half of off-and-on hobby-research on reverse engineering the digitizing raster/vector art program PaintTool Sai. So we tried everything that google had to offer us and spent more than 2 hours on this already The only thing that worked is activating game mode, but this comes at the cost of not allowing one of the main features of a graphic tablet: the touch sensitivity. Then we fixed the DPI scaling thing we tried older drivers (which didn't work at all) uninstalling all Tablet related drivers and try again fiddle around with the misc.ini of SAI fiddle around with other different options inside Sai or the driver trying to manually fix the offset through purposely calibrating the pen "wrong" (which does not quite give the wanted result) ![]() A quick run of google resolved the problem activate the admin mode for the driver. My Girlfriend has just bought the Huion Kamvas Pro 12 and it works fine with all kinds of software we tried so far.Įxcept with the single thing she uses almost exclusively, which is Paint Tool Sai.įirst we had the problem, that it didn't let us do anything at all, as soon as we used the Pen inside of Sai, it switched the screen.
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