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[GEMINI] Document custom forensics metadata parser architectural decision

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venus
2026-07-18 03:23:49 -05:00
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ARCHITECTURE.md
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@@ -50,6 +50,7 @@ Houses the logic for generic CLI context and active competition commands:
### D. Forensics ([forensics.py](file:///home/venus/code/ctf/src/ctf/forensics.py)) ### D. Forensics ([forensics.py](file:///home/venus/code/ctf/src/ctf/forensics.py))
Implements specialized forensic inspection utilities registered as a nested subgroup under the CLI: Implements specialized forensic inspection utilities registered as a nested subgroup under the CLI:
* **Custom Extractor**: Implements our own pure-Python, zero-dependency parser for standard TIFF/EXIF tags, Adobe XMP XML blocks, Photoshop IPTC IIM records, and JPEG/PNG physical parameters, rather than importing large external libraries.
* `info`: Inspects target file sizes, reads magic bytes, and warns if extensions do not match detected signatures. * `info`: Inspects target file sizes, reads magic bytes, and warns if extensions do not match detected signatures.
* `flag-search`: Extracts printable string sequences (equivalent to GNU `strings`) and matches them against regular expression patterns to find potential flags. * `flag-search`: Extracts printable string sequences (equivalent to GNU `strings`) and matches them against regular expression patterns to find potential flags.