thanhnvandClaude Opus 4.8
664bd1f00c
Physically move the pure-code subtrees out of .specify into the package, leaving compat symlinks at the old .specify/<dir> paths so every existing reference (internal CASAN_HARNESS_ROOT + external CI/docker/mjs) keeps resolving. Runtime state stays put. Moved (git mv): scripts/ tests/ security/ templates/ config/ governance/ memory/ .specify/<dir> -> packages/casan-harness/<dir> (+ .specify/<dir> symlink) Stays in .specify (state/governance/domain, handled later): logs/ agentops/ level5/ init-options.json traceability-map.json Python `.resolve()` self-location followed the compat symlink into packages and lost the app root; generate-casan-demo-context.py, generate-agentops-dashboard.py and dashboard-server.py now walk UP for the `.specify` state marker instead of a fixed parent depth (fixes "missing trace files" in run-casan4). Full gate: PASS=64 FAIL=0 SKIP=3 (CASAN_CI_STEP_TIMEOUT_SEC=1200 — track-a ~450s runs close to the 600s default and can tip over under load; this is timing variance, not a regression — it passed cleanly with headroom). Runtime log/audit artifacts kept unstaged. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
65 lines
2.0 KiB
Python
Executable File
65 lines
2.0 KiB
Python
Executable File
#!/usr/bin/env python3
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"""CASAN H4 — Suspicious base64/hex decoder (Track A, V4 encoding smuggling).
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Reads text on stdin. Finds embedded base64 and hex blobs, decodes them, and
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prints the decoded plaintext (one blob per line) on stdout so the caller can
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re-run its injection/secret pattern scan on the *decoded* content.
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Safety / no-false-positive design:
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* Only blobs >= MIN_LEN characters are considered (short words are ignored).
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* A decoded blob is emitted ONLY if it is mostly printable text. Random
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base64-looking words (e.g. "objectives", DER key bytes) decode to
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non-printable garbage and are dropped, so they can never trigger a match.
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* Output is advisory: the caller decides a decoded blob is malicious only if
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the decoded text itself matches a block/secret pattern.
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Deterministic: same input always yields the same output.
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"""
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import base64
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import binascii
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import re
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import sys
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MIN_LEN = 16
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PRINTABLE_RATIO = 0.8
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B64_RE = re.compile(r"[A-Za-z0-9+/]{%d,}={0,2}" % MIN_LEN)
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HEX_RE = re.compile(r"\b[0-9a-fA-F]{%d,}\b" % MIN_LEN)
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def _mostly_printable(text: str) -> bool:
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if not text:
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return False
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ok = sum(1 for c in text if c.isprintable() or c.isspace())
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return ok >= PRINTABLE_RATIO * len(text)
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def decode_blobs(data: str):
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out = []
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for m in B64_RE.findall(data):
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pad = m + "=" * ((4 - len(m) % 4) % 4)
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try:
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dec = base64.b64decode(pad, validate=True)
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except (binascii.Error, ValueError):
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continue
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txt = dec.decode("utf-8", "ignore")
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if _mostly_printable(txt):
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out.append(txt)
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for m in HEX_RE.findall(data):
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if len(m) % 2 != 0:
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continue
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try:
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dec = bytes.fromhex(m)
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except ValueError:
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continue
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txt = dec.decode("utf-8", "ignore")
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if _mostly_printable(txt):
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out.append(txt)
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return out
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if __name__ == "__main__":
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blobs = decode_blobs(sys.stdin.read())
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if blobs:
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sys.stdout.write("\n".join(blobs))
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