mirror of
https://github.com/norandom/OpenUltraSAST.git
synced 2026-10-16 11:49:28 +00:00
Marius CiepluchandClaude Opus 5
af7e33ef3e
contributor-scan 2.16, implementing the approved Req 5.6. `c/memory` scored zero true positives across 89k lines of C and three distinct classes of false one, for a structural reason: it models string CALLS and libpng overflows through arithmetic. The task allowed retiring the family. Kept, scoped and stated instead -- `strcpy` misuse is real in plenty of C and the family earns its place for that. Retiring it would have removed the disclosure along with the coverage, leaving a C scan silent for a reason nobody could read. **Its own description was the quiet-failure risk.** It claimed "bounds, lifetime, arithmetic", which is exactly what it does not decide. It now names the APIs it models, and a new `limits` field in families.toml says what it cannot: an overflow expressed as an index, a pointer offset, or a memcpy whose size is computed -- which is how most real C overflows are written, and how every one of libpng's is. A limit recorded in a fact table nobody reads is no better than silence, so the report renders it. **What was analysed** lists every family offered to a region whether or not it found anything, because a family that ran and reported nothing is the case a reader is most likely to misread, and it states plainly that silence means no fact table covered the code rather than that the code is safe. The counts are derived from the fact tables the arbiter actually used, so they cannot drift from what the engine looked for; only the limit sentence is authored, because "cannot decide an overflow expressed as an index" is a statement about an abstraction and no table can produce it. A C scan that finds nothing now says: | c | `memory` | 121 | 9 | **`memory` (c)** — Models CALLS, not arithmetic... Gates byte-identical. Co-Authored-By: Claude Opus 5 (1M context) <[email protected]> Claude-Session: https://claude.ai/code/session_01T7XD7x5KonMdmGRkp63EQG
555 lines
22 KiB
Python
555 lines
22 KiB
Python
import json
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import subprocess
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from pathlib import Path
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from types import SimpleNamespace
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import pytest
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from openultrasast.cli import main
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from openultrasast.complexity.hints import TestHint
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from openultrasast.complexity.map import ComplexityMap, Hotspot
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from openultrasast.findings import StaticFinding
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from openultrasast.regress import CandidateVerdict
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from openultrasast.reports import scan_exit_code, write_manifest, write_markdown_report, write_sarif_report
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from openultrasast.run import ScanRun
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from openultrasast.stages import Stage, plan_for_mode, record_completed, stages_payload
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from openultrasast.verification import verify_finding
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def test_sarif_report_uses_finding_ids_and_evidence_properties(tmp_path: Path) -> None:
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finding = _finding()
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verification = verify_finding(finding)
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output = tmp_path / "report.sarif"
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write_sarif_report([finding], [verification], output)
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payload = json.loads(output.read_text())
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result = payload["runs"][0]["results"][0]
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assert payload["version"] == "2.1.0"
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assert result["partialFingerprints"]["openultrasastFindingId"] == finding.finding_id
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assert result["properties"]["finding_id"] == finding.finding_id
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assert result["properties"]["evidence_level"] == "static_corroboration"
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assert result["properties"]["verification"]["status"] == "accepted"
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def test_manifest_links_shared_artifacts_by_finding_id(tmp_path: Path) -> None:
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run = ScanRun(scan_id="scan-1", root=tmp_path / "run", target=tmp_path / "repo")
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run.root.mkdir()
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finding = _finding()
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verification = verify_finding(finding)
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artifacts = {
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"findings": run.root / "findings.json",
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"verification": run.root / "verification.json",
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"markdown": run.root / "report.md",
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"sarif": run.root / "report.sarif",
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}
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output = run.root / "manifest.json"
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write_manifest(run=run, findings=[finding], verifications=[verification], artifact_paths=artifacts, path=output)
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payload = json.loads(output.read_text())
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manifest_finding = payload["findings"][0]
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assert payload["scan_id"] == "scan-1"
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assert manifest_finding["finding_id"] == finding.finding_id
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assert manifest_finding["verification_status"] == "accepted"
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assert manifest_finding["artifact_refs"]["sarif"] == "report.sarif"
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assert "stages" not in payload
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def test_manifest_includes_requested_completed_skipped_stages(tmp_path: Path) -> None:
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run = ScanRun(scan_id="scan-1", root=tmp_path / "run", target=tmp_path / "repo")
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run.root.mkdir()
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finding = _finding()
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artifacts = {
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"findings": run.root / "findings.json",
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"verification": run.root / "verification.json",
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"markdown": run.root / "report.md",
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"sarif": run.root / "report.sarif",
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}
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output = run.root / "manifest.json"
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plan = record_completed(plan_for_mode("quick"), Stage.STATIC)
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write_manifest(
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run=run,
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findings=[finding],
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verifications=[verify_finding(finding)],
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artifact_paths=artifacts,
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path=output,
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stages=stages_payload(plan),
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)
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payload = json.loads(output.read_text())
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assert payload["stages"] == {"requested": ["static"], "completed": ["static"], "skipped": []}
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assert payload["findings"][0]["finding_id"] == finding.finding_id
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def test_markdown_report_includes_verification_status(tmp_path: Path) -> None:
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finding = _finding()
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output = tmp_path / "report.md"
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write_markdown_report([finding], output, [verify_finding(finding)])
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text = output.read_text()
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assert "## Inventory" in text
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assert "Verification: `accepted`" in text
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assert finding.finding_id in text
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assert "worth-fixing" not in text.lower()
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assert "worth_fixing" not in text.lower()
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def test_markdown_report_includes_complexity_map_and_worth_fixing_sections(tmp_path: Path) -> None:
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finding = _finding()
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output = tmp_path / "report.md"
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hint = TestHint(
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path="app.py",
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function_name="admin",
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gap="no_adjacent_test",
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test_kind="http-contract",
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reason="no adjacent test file for app.py::admin; recommend http-contract.",
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)
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hotspot = Hotspot(
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path="app.py",
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function_name="admin",
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score=6.5,
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band="high",
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signals={"loc": 12, "has_adjacent_test": False},
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rationale="high band: nested public route",
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test_hint=hint,
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inventory_finding_ids=(finding.finding_id,),
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)
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verdict = CandidateVerdict(
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path="app.py",
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function_name="admin",
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language="python",
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verdict="triggerable",
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reason="crash",
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inventory_finding_ids=(finding.finding_id,),
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worth_fixing=True,
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)
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skipped = CandidateVerdict(
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path="safe.py",
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function_name=None,
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language="python",
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verdict="not_triggerable",
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reason="exit_zero",
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inventory_finding_ids=(),
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worth_fixing=False,
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)
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write_markdown_report(
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[finding],
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output,
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[verify_finding(finding)],
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complexity_map=ComplexityMap(hotspots=(hotspot,), heuristic_only=True),
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verdicts=(verdict, skipped),
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)
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text = output.read_text()
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inventory_at = text.index("## Inventory")
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map_at = text.index("## Complexity map")
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worth_at = text.index("## Worth fixing")
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assert inventory_at < map_at < worth_at
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map_section = text[map_at:worth_at]
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worth_section = text[worth_at:]
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assert "app.py::admin" in map_section
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assert "Gap: `no_adjacent_test`" in map_section
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assert "Recommended test: `http-contract`" in map_section
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assert "triggerable" in worth_section
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assert "crash" in worth_section
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assert "safe.py" not in worth_section
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assert "## Inventory" in text
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def test_markdown_report_labels_hits_as_inventory_not_worth_fixing(tmp_path: Path) -> None:
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finding = _finding()
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output = tmp_path / "report.md"
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write_markdown_report([finding], output, [verify_finding(finding)])
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text = output.read_text()
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inventory_at = text.index("## Inventory")
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finding_at = text.index(f"## {finding.title}")
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assert inventory_at < finding_at
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assert "worth-fixing" not in text.lower()
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def test_scan_exit_code_policy() -> None:
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finding = _finding()
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verification = verify_finding(finding)
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worth_fixing = SimpleNamespace(worth_fixing=True)
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assert scan_exit_code([finding], [verification], "never") == 0
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assert scan_exit_code([finding], [verification], "findings") == 1
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assert scan_exit_code([], [], "findings") == 0
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assert scan_exit_code([finding], [verification], "verified") == 1
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assert scan_exit_code([], [], "verified") == 0
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# findings/verified ignore worth-fixing verdicts
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assert scan_exit_code([], [], "findings", worth_fixing_verdicts=[worth_fixing]) == 0
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assert scan_exit_code([], [], "verified", worth_fixing_verdicts=[worth_fixing]) == 0
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assert scan_exit_code([finding], [verification], "findings", worth_fixing_verdicts=[worth_fixing]) == 1
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assert scan_exit_code([finding], [verification], "verified", worth_fixing_verdicts=[worth_fixing]) == 1
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def test_scan_exit_code_worth_fixing() -> None:
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finding = _finding()
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verification = verify_finding(finding)
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worth_fixing = SimpleNamespace(worth_fixing=True)
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not_worth_fixing = SimpleNamespace(worth_fixing=False)
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assert scan_exit_code([finding], [verification], "worth-fixing") == 0
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assert scan_exit_code([finding], [verification], "worth-fixing", worth_fixing_verdicts=[]) == 0
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assert scan_exit_code([finding], [verification], "worth-fixing", worth_fixing_verdicts=[not_worth_fixing]) == 0
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assert scan_exit_code([finding], [verification], "worth-fixing", worth_fixing_verdicts=[worth_fixing]) == 1
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def test_scan_exit_code_unknown_policy() -> None:
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with pytest.raises(ValueError, match="unknown fail policy"):
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scan_exit_code([], [], "maybe")
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def test_scan_help_lists_worth_fixing(capsys: pytest.CaptureFixture[str]) -> None:
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with pytest.raises(SystemExit) as exc:
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main(["scan", "--help"])
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assert exc.value.code == 0
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help_text = capsys.readouterr().out
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assert "worth-fixing" in help_text
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assert "findings" in help_text
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assert "verified" in help_text
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def test_cli_scan_writes_sarif_manifest_and_honors_fail_policy(tmp_path: Path, monkeypatch) -> None: # type: ignore[no-untyped-def]
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repo = tmp_path / "repo"
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repo.mkdir()
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(repo / "app.py").write_text("@app.route('/admin')\ndef admin():\n return eval(request.data)\n")
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monkeypatch.setenv("OPENULTRASAST_RUNS_DIR", ".runs")
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assert main(["scan", str(repo), "--mode", "quick", "--fail-on", "verified"]) == 1
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run_dir = sorted((repo / ".runs").iterdir())[-1]
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sarif = json.loads((run_dir / "report.sarif").read_text())
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manifest = json.loads((run_dir / "manifest.json").read_text())
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finding_id = manifest["findings"][0]["finding_id"]
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assert sarif["runs"][0]["results"][0]["properties"]["finding_id"] == finding_id
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assert manifest["findings"][0]["artifact_refs"]["verification_json"] == "verification.json"
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def test_cli_scan_fail_on_worth_fixing_exits_zero_without_verdicts(tmp_path: Path, monkeypatch) -> None: # type: ignore[no-untyped-def]
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repo = tmp_path / "repo"
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repo.mkdir()
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(repo / "app.py").write_text("@app.route('/admin')\ndef admin():\n return eval(request.data)\n")
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monkeypatch.setenv("OPENULTRASAST_RUNS_DIR", ".runs")
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assert main(["scan", str(repo), "--mode", "quick", "--fail-on", "worth-fixing"]) == 0
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def test_quick_scan_report_is_inventory_without_map_or_docker(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
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from openultrasast import tool_hunter
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from openultrasast.complexity import map as complexity_map
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from openultrasast.sandbox import probe as sandbox_probe
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from openultrasast.sandbox import runner as sandbox_runner
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repo = tmp_path / "repo"
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repo.mkdir()
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(repo / "app.py").write_text("@app.route('/admin')\ndef admin():\n return eval(request.data)\n")
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monkeypatch.setenv("OPENULTRASAST_RUNS_DIR", ".runs")
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docker_argv: list[list[str]] = []
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original_run = subprocess.run
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def guarded_run(command, *args, **kwargs): # type: ignore[no-untyped-def]
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argv = list(command) if isinstance(command, list | tuple) else [command]
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if argv and Path(str(argv[0])).name == "docker":
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docker_argv.append(argv)
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raise AssertionError(f"quick scan must not start docker: {argv}")
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return original_run(command, *args, **kwargs)
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def fail(message: str): # type: ignore[no-untyped-def]
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def _fail(*args, **kwargs): # type: ignore[no-untyped-def]
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raise AssertionError(message)
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return _fail
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monkeypatch.setattr(subprocess, "run", guarded_run)
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monkeypatch.setattr(sandbox_runner, "build_docker_argv", fail("quick scan must not build docker argv"))
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monkeypatch.setattr(sandbox_probe.SandboxProbe, "available", fail("quick scan must not probe docker"))
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monkeypatch.setattr(complexity_map, "build_complexity_map", fail("quick scan must not build a complexity map"))
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monkeypatch.setattr(tool_hunter, "run_tool_hunter", fail("quick scan must not start a hunter model"))
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assert main(["scan", str(repo), "--mode", "quick"]) == 0
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run_dir = sorted((repo / ".runs").iterdir())[-1]
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report = (run_dir / "report.md").read_text()
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manifest = json.loads((run_dir / "manifest.json").read_text())
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assert "## Inventory" in report
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assert "worth-fixing" not in report.lower()
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assert not (run_dir / "complexity_map.json").exists()
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assert docker_argv == []
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assert manifest["stages"]["requested"] == ["static"]
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assert manifest["stages"]["completed"] == ["static"]
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assert manifest["stages"]["skipped"] == []
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assert "complexity" not in manifest
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assert "complexity_map" not in manifest.get("artifacts", {})
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assert not any(entry.get("reason") == "hunter_model_unavailable" for entry in manifest.get("degradations", []))
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def test_standard_scan_writes_complexity_map_without_docker(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
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from openultrasast.sandbox import probe as sandbox_probe
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from openultrasast.sandbox import runner as sandbox_runner
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repo = tmp_path / "repo"
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repo.mkdir()
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(repo / "app.py").write_text("@app.route('/admin')\ndef admin():\n return eval(request.data)\n")
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monkeypatch.setenv("OPENULTRASAST_RUNS_DIR", ".runs")
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docker_argv: list[list[str]] = []
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original_run = subprocess.run
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def guarded_run(command, *args, **kwargs): # type: ignore[no-untyped-def]
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argv = list(command) if isinstance(command, list | tuple) else [command]
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if argv and Path(str(argv[0])).name == "docker":
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docker_argv.append(argv)
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raise AssertionError(f"standard scan must not start docker: {argv}")
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return original_run(command, *args, **kwargs)
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def fail(message: str): # type: ignore[no-untyped-def]
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def _fail(*args, **kwargs): # type: ignore[no-untyped-def]
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raise AssertionError(message)
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return _fail
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monkeypatch.setattr(subprocess, "run", guarded_run)
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monkeypatch.setattr(sandbox_runner, "build_docker_argv", fail("standard scan must not build docker argv"))
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monkeypatch.setattr(sandbox_probe.SandboxProbe, "available", fail("standard scan must not probe docker"))
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assert main(["scan", str(repo), "--mode", "standard"]) == 0
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run_dir = sorted((repo / ".runs").iterdir())[-1]
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map_path = run_dir / "complexity_map.json"
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manifest = json.loads((run_dir / "manifest.json").read_text())
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complexity_map = json.loads(map_path.read_text())
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assert map_path.is_file()
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assert complexity_map["heuristic_only"] is True
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assert isinstance(complexity_map["hotspots"], list)
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assert complexity_map["hotspots"]
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assert docker_argv == []
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assert manifest["stages"]["requested"] == ["static", "map"]
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assert manifest["stages"]["completed"] == ["static", "map"]
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assert manifest["stages"]["skipped"] == []
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assert manifest["complexity"]["hotspot_count"] == len(complexity_map["hotspots"])
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assert manifest["complexity"]["heuristic_only"] is True
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assert manifest["artifacts"]["complexity_map"] == "complexity_map.json"
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report = (run_dir / "report.md").read_text()
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assert "## Inventory" in report
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assert "## Complexity map" in report
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assert "Gap:" in report
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assert "## Worth fixing" not in report
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def test_standard_scan_records_hunter_model_unavailable_when_model_unset(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
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from openultrasast.sandbox import probe as sandbox_probe
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from openultrasast.sandbox import runner as sandbox_runner
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repo = tmp_path / "repo"
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repo.mkdir()
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(repo / "app.py").write_text("@app.route('/admin')\ndef admin():\n return eval(request.data)\n")
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monkeypatch.setenv("OPENULTRASAST_RUNS_DIR", ".runs")
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def fail(message: str): # type: ignore[no-untyped-def]
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def _fail(*args, **kwargs): # type: ignore[no-untyped-def]
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raise AssertionError(message)
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return _fail
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monkeypatch.setattr(sandbox_runner, "build_docker_argv", fail("standard scan must not build docker argv"))
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monkeypatch.setattr(sandbox_probe.SandboxProbe, "available", fail("standard scan must not probe docker"))
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assert main(["scan", str(repo), "--mode", "standard"]) == 0
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run_dir = sorted((repo / ".runs").iterdir())[-1]
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manifest = json.loads((run_dir / "manifest.json").read_text())
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degradations = manifest.get("degradations", [])
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assert any(entry.get("reason") == "hunter_model_unavailable" for entry in degradations)
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hunter_skip = next(entry for entry in degradations if entry.get("reason") == "hunter_model_unavailable")
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assert hunter_skip["stage"] in {"map", "hunter_pool"}
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assert manifest["complexity"]["heuristic_only"] is True
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assert (run_dir / "complexity_map.json").is_file()
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def test_manifest_includes_complexity_summary(tmp_path: Path) -> None:
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run = ScanRun(scan_id="scan-1", root=tmp_path / "run", target=tmp_path / "repo")
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run.root.mkdir()
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finding = _finding()
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artifacts = {
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"findings": run.root / "findings.json",
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"verification": run.root / "verification.json",
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"markdown": run.root / "report.md",
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"sarif": run.root / "report.sarif",
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"complexity_map": run.root / "complexity_map.json",
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}
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output = run.root / "manifest.json"
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write_manifest(
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run=run,
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findings=[finding],
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verifications=[verify_finding(finding)],
|
|
artifact_paths=artifacts,
|
|
path=output,
|
|
complexity={"hotspot_count": 3, "heuristic_only": True},
|
|
)
|
|
|
|
payload = json.loads(output.read_text())
|
|
assert payload["complexity"] == {"hotspot_count": 3, "heuristic_only": True}
|
|
assert payload["artifacts"]["complexity_map"] == "complexity_map.json"
|
|
|
|
|
|
def test_manifest_includes_worth_fixing_count(tmp_path: Path) -> None:
|
|
run = ScanRun(scan_id="scan-1", root=tmp_path / "run", target=tmp_path / "repo")
|
|
run.root.mkdir()
|
|
finding = _finding()
|
|
artifacts = {
|
|
"findings": run.root / "findings.json",
|
|
"verification": run.root / "verification.json",
|
|
"markdown": run.root / "report.md",
|
|
"sarif": run.root / "report.sarif",
|
|
"verdicts": run.root / "verdicts.json",
|
|
}
|
|
output = run.root / "manifest.json"
|
|
|
|
write_manifest(
|
|
run=run,
|
|
findings=[finding],
|
|
verifications=[verify_finding(finding)],
|
|
artifact_paths=artifacts,
|
|
path=output,
|
|
stages={"requested": ["static", "map", "regress"], "completed": ["static", "map", "regress"], "skipped": []},
|
|
worth_fixing={
|
|
"count": 1,
|
|
"verdicts": [{"path": "app.py", "function_name": "admin", "verdict": "triggerable", "reason": "crash"}],
|
|
},
|
|
)
|
|
|
|
payload = json.loads(output.read_text())
|
|
assert payload["stages"]["completed"] == ["static", "map", "regress"]
|
|
assert payload["worth_fixing"]["count"] == 1
|
|
assert payload["worth_fixing"]["verdicts"][0]["verdict"] == "triggerable"
|
|
|
|
|
|
def _finding() -> StaticFinding:
|
|
return StaticFinding(
|
|
finding_id="python-unsafe-eval:app.py:3",
|
|
path="app.py",
|
|
title="Dynamic Python execution needs review",
|
|
severity="high",
|
|
confidence="medium",
|
|
evidence_level="static_corroboration",
|
|
rationale="Static pattern matched.",
|
|
line=3,
|
|
function_name="admin",
|
|
reachability_status="reachable",
|
|
reachability_evidence=[
|
|
{
|
|
"kind": "route",
|
|
"access_level": "public",
|
|
"line": 1,
|
|
"end_line": 3,
|
|
"function_name": "admin",
|
|
"conditions": [],
|
|
}
|
|
],
|
|
reachability_conditions=[],
|
|
tags=["syscall_entry"],
|
|
ranking_priority=3.0,
|
|
)
|
|
|
|
|
|
def _pattern_finding(rule: str, path: str, line: int) -> StaticFinding:
|
|
from dataclasses import replace
|
|
|
|
base = _finding()
|
|
return replace(base, finding_id=f"{rule}:{path}:{line}", path=path, line=line, title=f"{rule} needs review")
|
|
|
|
|
|
def test_a_pattern_rule_with_many_sites_is_summarised_not_repeated(tmp_path: Path) -> None:
|
|
"""contributor-scan 2.11. libpng emitted 198 sections, 163 of them asserting that `memcpy` and `strcpy`
|
|
are PRESENT in a library that uses them correctly throughout. That is the noise developers have learned
|
|
to skip in every other tool, and shipping it costs the findings beside it their credibility."""
|
|
crowded = [_pattern_finding("c-unsafe-copy", f"src/f{i}.c", i) for i in range(20)]
|
|
output = tmp_path / "report.md"
|
|
|
|
write_markdown_report(crowded, output)
|
|
|
|
text = output.read_text()
|
|
assert "## Pattern matches" in text
|
|
assert "20 site(s) across 20 file(s)" in text
|
|
assert text.count("## c-unsafe-copy needs review") == 0, "twenty sections for one rule is the noise"
|
|
assert "`findings.json`" in text, "counted, never dropped"
|
|
|
|
|
|
def test_a_pattern_rule_with_few_sites_keeps_its_sections(tmp_path: Path) -> None:
|
|
"""One `python-flask-debug` is a finding a contributor can act on, and must not be summarised away."""
|
|
output = tmp_path / "report.md"
|
|
|
|
write_markdown_report([_pattern_finding("python-flask-debug", "app.py", 17)], output)
|
|
|
|
text = output.read_text()
|
|
assert "## python-flask-debug needs review" in text
|
|
assert "## Pattern matches" not in text
|
|
|
|
|
|
def test_a_reasoned_claim_keeps_its_section_whatever_its_rung(tmp_path: Path) -> None:
|
|
"""An obligation or model finding sits at `suspicion` too, but it is a claim about a site rather than an
|
|
observation that an API exists. Twenty of them are twenty findings, not one property of the codebase."""
|
|
from dataclasses import replace
|
|
|
|
base = _finding()
|
|
reasoned = [
|
|
replace(base, finding_id=f"obligation:protected_read:api/u.py:{i}", evidence_level="suspicion", path="api/u.py", line=i)
|
|
for i in range(20)
|
|
]
|
|
output = tmp_path / "report.md"
|
|
|
|
write_markdown_report(reasoned, output)
|
|
|
|
assert output.read_text().count(f"## {base.title}") == 20
|
|
|
|
|
|
def test_the_report_says_what_was_looked_for_and_what_cannot_be_decided(tmp_path: Path) -> None:
|
|
"""contributor-scan 2.16, Req 5.6. `c/memory` scored zero true positives across 89k lines of C for a
|
|
structural reason -- it models string CALLS and libpng overflows through arithmetic. A silent scan
|
|
reading as a clean bill of health is worse than a noisy one, because the reader acts on it."""
|
|
output = tmp_path / "report.md"
|
|
coverage = [
|
|
{
|
|
"language": "c",
|
|
"family": "memory",
|
|
"regions": 121,
|
|
"modelled": 9,
|
|
"description": "Misuse of unbounded string and format APIs",
|
|
"limits": "Models CALLS, not arithmetic. It cannot decide an overflow expressed as an index.",
|
|
}
|
|
]
|
|
|
|
write_markdown_report([], output, coverage=coverage)
|
|
|
|
text = output.read_text()
|
|
assert "## What was analysed" in text
|
|
assert "| c | `memory` | 121 | 9 |" in text, "what it looked for, counted from the fact table itself"
|
|
assert "### Stated limits" in text
|
|
assert "cannot decide an overflow expressed as an index" in text
|
|
assert "silence here means no fact table covered the code, not that the code is safe" in text
|
|
|
|
|
|
def test_a_scan_that_made_no_claims_states_no_limits(tmp_path: Path) -> None:
|
|
"""A report with no model layer has nothing to disclaim; the section would be noise."""
|
|
output = tmp_path / "report.md"
|
|
|
|
write_markdown_report([_finding()], output)
|
|
|
|
assert "## What was analysed" not in output.read_text()
|