feat(cps): add CPS decryption, large GRF support, and error improvements#5
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guicaulada wants to merge 4 commits into
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feat(cps): add CPS decryption, large GRF support, and error improvements#5guicaulada wants to merge 4 commits into
guicaulada wants to merge 4 commits into
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Add -k/--key option to specify a cps.dll file for decrypting GRF files encrypted with CPS/Fury encryption. The decryption module extracts the RC4 S-box from the DLL's embedded key data and applies RC4 stream cipher decryption before zlib decompression. Falls back to plain inflate for unencrypted entries within encrypted GRFs. Also fixes a bug where compressed data was written to disk instead of decompressed data.
Bitwise OR with left shift produces signed 32-bit integers in JS, causing offsets >= 0x80000000 to become negative. Use unsigned right shift (>>> 0) to convert entry fields to unsigned 32-bit values.
Replace verbose multi-line error output with stack traces with single-line messages showing the file path and error reason.
The -k flag now accepts both CPS DLLs (with NUMBER marker) and plain text files containing a 512-character hex S-box. This enables decryption of GRFs encrypted by obfuscated CPS variants where the S-box must be dumped from runtime memory.
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Add support for extracting CPS/Fury-encrypted GRF files, fix extraction of large GRFs, and clean up error output.
-k/--keyoption to specify a CPS decryption key sourceUsage
Standard CPS DLL:
Raw S-box file: