tests/test_scanner_python.py
| 1 | """Scanner tests for Python fixtures.""" |
| 2 | |
| 3 | from __future__ import annotations |
| 4 | |
| 5 | import os |
| 6 | |
| 7 | from pqc_lint.scanner import Scanner |
| 8 | |
| 9 | |
| 10 | def _write(path, content): |
| 11 | path.parent.mkdir(parents=True, exist_ok=True) |
| 12 | path.write_text(content, encoding="utf-8") |
| 13 | |
| 14 | |
| 15 | def test_scanner_detects_rsa_generate(scan_tmpdir, sample_python_rsa): |
| 16 | p = scan_tmpdir / "rsa_sample.py" |
| 17 | _write(p, sample_python_rsa) |
| 18 | report = Scanner().scan_path(str(scan_tmpdir)) |
| 19 | ids = {f.rule_id for f in report.findings} |
| 20 | assert "PQC001" in ids |
| 21 | |
| 22 | |
| 23 | def test_scanner_detects_ecdsa(scan_tmpdir, sample_python_ecdsa): |
| 24 | p = scan_tmpdir / "ec_sample.py" |
| 25 | _write(p, sample_python_ecdsa) |
| 26 | report = Scanner().scan_path(str(scan_tmpdir)) |
| 27 | ids = {f.rule_id for f in report.findings} |
| 28 | assert "PQC002" in ids |
| 29 | |
| 30 | |
| 31 | def test_scanner_detects_ed25519(scan_tmpdir): |
| 32 | p = scan_tmpdir / "ed.py" |
| 33 | _write(p, ( |
| 34 | "from cryptography.hazmat.primitives.asymmetric import ed25519\n" |
| 35 | "k = ed25519.Ed25519PrivateKey.generate()\n" |
| 36 | )) |
| 37 | report = Scanner().scan_path(str(scan_tmpdir)) |
| 38 | ids = {f.rule_id for f in report.findings} |
| 39 | assert "PQC003" in ids |
| 40 | |
| 41 | |
| 42 | def test_scanner_detects_md5(scan_tmpdir): |
| 43 | p = scan_tmpdir / "h.py" |
| 44 | _write(p, "import hashlib\nd = hashlib.md5(b'x').hexdigest()\n") |
| 45 | report = Scanner().scan_path(str(scan_tmpdir)) |
| 46 | ids = {f.rule_id for f in report.findings} |
| 47 | assert "PQC301" in ids |
| 48 | |
| 49 | |
| 50 | def test_scanner_clean_file_no_findings(scan_tmpdir, sample_python_clean): |
| 51 | p = scan_tmpdir / "clean.py" |
| 52 | _write(p, sample_python_clean) |
| 53 | report = Scanner().scan_path(str(scan_tmpdir)) |
| 54 | assert report.findings == [] |
| 55 | assert report.files_scanned == 1 |
| 56 | |
| 57 | |
| 58 | def test_scanner_excludes_directories(scan_tmpdir, sample_python_rsa): |
| 59 | node = scan_tmpdir / "node_modules" / "evil.py" |
| 60 | _write(node, sample_python_rsa) |
| 61 | report = Scanner().scan_path(str(scan_tmpdir)) |
| 62 | # File inside node_modules should not produce findings |
| 63 | paths = {f.file for f in report.findings} |
| 64 | assert not any("node_modules" in p for p in paths) |
| 65 | |
| 66 | |
| 67 | def test_scanner_respects_language_filter(scan_tmpdir, sample_python_rsa): |
| 68 | p = scan_tmpdir / "x.py" |
| 69 | _write(p, sample_python_rsa) |
| 70 | report = Scanner(languages=("go",)).scan_path(str(scan_tmpdir)) |
| 71 | assert report.findings == [] |
| 72 | |
| 73 | |
| 74 | def test_scanner_handles_nonexistent_file(): |
| 75 | scanner = Scanner() |
| 76 | findings = scanner.scan_file("/totally/not/a/real/path.py") |
| 77 | assert findings == [] |
| 78 | |
| 79 | |
| 80 | def test_scanner_skips_huge_files(scan_tmpdir): |
| 81 | p = scan_tmpdir / "big.py" |
| 82 | # Write >2MB of data. The pattern IS inside, but file should be skipped. |
| 83 | content = ( |
| 84 | "import cryptography\n" |
| 85 | + ("x = 1" + " " * 20 + "\n") * 100_000 |
| 86 | + "rsa.generate_private_key()\n" |
| 87 | ) |
| 88 | _write(p, content) |
| 89 | assert os.path.getsize(p) > 2 * 1024 * 1024 |
| 90 | report = Scanner().scan_path(str(scan_tmpdir)) |
| 91 | assert report.findings == [] |
| 92 | |