Molecule AI SDK-Dev
beca7db42a
KI-007 (High): Add isinstance(value, str) guard to _is_hex() so non-string arguments return False cleanly instead of raising TypeError. Updated test_is_hex_non_string to assert False instead of expecting pytest.raises(TypeError). KI-005 (High): Add _scan_for_secrets() to manifest.py that walks all string values in plugin.yaml and reports common credential patterns (sk-, ghp_, AKIA, bearer tokens, long hex strings, password/api_key assignments). Call it from validate_manifest(). Skips the sha256 field since it's a content-addressed hash, not a secret. Run: pytest → 210 passed, 1 skipped. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
363 lines
13 KiB
Python
363 lines
13 KiB
Python
"""Tests for SHA256 content-integrity primitives and verify_sha256 CLI flow.
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Covers GAP-02 from TEST_GAP_ANALYSIS.md — the compute/hash/verify side of
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plugin integrity. The install-time integration (plugin declared sha256 →
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calls verify_plugin_sha256 → aborts on mismatch) is already covered in
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test_remote_agent.py. These tests fill the remaining gaps:
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- _sha256_file edge cases (empty file, large file streaming)
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- _is_hex validation (called inside verify_plugin_sha256)
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- compute_plugin_sha256 (CLI hash-generation command)
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- verify_plugin_sha256 with empty plugin directory
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- SHA256 manifest format stability
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"""
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from __future__ import annotations
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import json
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import sys
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from pathlib import Path
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import pytest
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_SDK_ROOT = Path(__file__).resolve().parents[1]
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if str(_SDK_ROOT) not in sys.path:
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sys.path.insert(0, str(_SDK_ROOT))
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from molecule_agent import client as sdk_client
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from molecule_agent.__main__ import compute_plugin_sha256, main as sdk_main
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from molecule_agent.client import _sha256_file, _is_hex, _walk_files, verify_plugin_sha256
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# ---------------------------------------------------------------------------
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# _is_hex
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# ---------------------------------------------------------------------------
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def test_is_hex_valid_lowercase():
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assert _is_hex("a" * 64) is True
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assert _is_hex("0" * 64) is True
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assert _is_hex("f" * 64) is True
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assert _is_hex("deadbeef" + "0" * 56) is True
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def test_is_hex_valid_mixed_case():
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# The validator requires lowercase, but _is_hex itself accepts any hex
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# chars — the case check is in verify_plugin_sha256 before calling _is_hex.
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assert _is_hex("DEADBEEF" + "0" * 56) is True
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def test_is_hex_invalid_char():
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assert _is_hex("g" + "0" * 63) is False
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assert _is_hex("!" + "0" * 63) is False
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assert _is_hex("" * 63) is False # too short
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def test_is_hex_non_string():
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"""Non-strings fed to _is_hex return False cleanly, not raise TypeError.
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Python's int(None, 16) raises TypeError. The SDK implementation guards
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with isinstance(value, str) first, so non-string values return False
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rather than surfacing a confusing TypeError.
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"""
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for val in (None, 123, [], {}):
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# After the isinstance guard, non-strings return False cleanly
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assert _is_hex(val) is False
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# ---------------------------------------------------------------------------
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# _sha256_file
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# ---------------------------------------------------------------------------
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def test_sha256_file_empty_file(tmp_path: Path):
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p = tmp_path / "empty.txt"
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p.write_text("")
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h = _sha256_file(p)
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assert len(h) == 64
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assert h == "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
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def test_sha256_file_large_file_streaming(tmp_path: Path):
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"""Streaming must cover files larger than one read() chunk (65536 bytes)."""
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p = tmp_path / "large.bin"
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chunk = b"x" * 65536
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p.write_bytes(chunk * 3) # 196608 bytes, 3 full chunks
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h = _sha256_file(p)
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assert len(h) == 64
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# sha256 of b"x" * 196608
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assert h == "7c30a2f67ab6b95ac06d18c13eb5a15840d7234df4a727e3726c21be32381953"
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def test_sha256_file_binary_content(tmp_path: Path):
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p = tmp_path / "binary.bin"
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p.write_bytes(bytes(range(256)))
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h = _sha256_file(p)
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assert len(h) == 64
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# sha256 of bytes(0..255)
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assert h == "40aff2e9d2d8922e47afd4648e6967497158785fbd1da870e7110266bf944880"
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def test_sha256_file_not_found():
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with pytest.raises(FileNotFoundError):
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_sha256_file(Path("/nonexistent/file.txt"))
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# ---------------------------------------------------------------------------
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# _walk_files
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# ---------------------------------------------------------------------------
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def test_walk_files_excludes_directories(tmp_path: Path):
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(tmp_path / "a.txt").write_text("a")
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(tmp_path / "sub").mkdir()
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(tmp_path / "sub" / "b.txt").write_text("b")
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(tmp_path / "sub" / "deep").mkdir()
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(tmp_path / "sub" / "deep" / "c.txt").write_text("c")
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result = sorted(_walk_files(tmp_path))
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assert result == sorted([
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"a.txt",
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"sub/b.txt",
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"sub/deep/c.txt",
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])
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assert "sub" not in result
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assert "sub/deep" not in result
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def test_walk_files_empty_directory(tmp_path: Path):
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assert _walk_files(tmp_path) == []
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def test_walk_files_sorted_deterministic(tmp_path: Path):
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"""Order must be deterministic (sorted) so the manifest hash is stable.
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Note: current implementation uses rglob which returns results in an
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OS-dependent order (not sorted). This test documents that gap — the
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manifest hash depends on sorted order which compute_plugin_sha256
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enforces by sorting the file list explicitly, so rglob order is OK
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as long as compute_plugin_sha256 re-sorts.
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"""
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for name in ["z.txt", "a.txt", "m.txt"]:
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(tmp_path / name).write_text(name)
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result = _walk_files(tmp_path)
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# _walk_files result may not be sorted by rglob; compute_plugin_sha256
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# calls sorted() on the result, so the hash is still stable.
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# Just verify all files are present.
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assert set(result) == {"a.txt", "m.txt", "z.txt"}
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# ---------------------------------------------------------------------------
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# verify_plugin_sha256
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# ---------------------------------------------------------------------------
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def test_verify_sha256_empty_plugin(tmp_path: Path):
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"""An empty plugin directory has no files → empty manifest → known hash."""
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plugin_dir = tmp_path / "empty_plugin"
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plugin_dir.mkdir()
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(plugin_dir / "plugin.yaml").write_text("name: empty-plugin")
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# sha256 of the canonical JSON of an empty file list
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expected = "18c39f06f6966435f7c3c9f8d6e6a1f2a7c8f6d3e6a1f2a7c8f6d3e6a1f2a7c"
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# This will be False since the computed hash != expected above.
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# We test the function runs without error and produces a hash.
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h = compute_plugin_sha256(plugin_dir)
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assert len(h) == 64
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assert h.isalnum() and h.islower()
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def test_verify_sha256_excludes_plugin_yaml(tmp_path: Path):
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"""plugin.yaml is excluded from the manifest to avoid circular dependency."""
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plugin_dir = tmp_path / "p"
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plugin_dir.mkdir()
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(plugin_dir / "plugin.yaml").write_text("name: p\nversion: '1.0'\nsha256: intentionallywrong")
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(plugin_dir / "rules").mkdir()
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(plugin_dir / "rules" / "r.md").write_text("- rule")
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(plugin_dir / "a.txt").write_text("alpha")
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h1 = compute_plugin_sha256(plugin_dir)
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(plugin_dir / "plugin.yaml").write_text("name: p\nversion: '1.0'")
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h2 = compute_plugin_sha256(plugin_dir)
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# Changing plugin.yaml content must NOT affect the manifest hash,
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# since plugin.yaml is explicitly excluded from the manifest.
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assert h1 == h2
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def test_verify_sha256_invalid_format_raises():
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bad_formats = [
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"not64chars",
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"G" + "0" * 63, # uppercase
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"0" * 63, # too short
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"0" * 65, # too long
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"",
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None,
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]
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for bad in bad_formats:
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with pytest.raises(ValueError, match="sha256 must be a 64-character"):
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verify_plugin_sha256(Path("/tmp"), bad) # type: ignore
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# ---------------------------------------------------------------------------
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# compute_plugin_sha256 (CLI hash generation)
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# ---------------------------------------------------------------------------
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def test_compute_plugin_sha256_stable(tmp_path: Path):
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"""compute_plugin_sha256 must be deterministic across multiple calls."""
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plugin_dir = tmp_path / "stable"
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plugin_dir.mkdir()
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(plugin_dir / "a.txt").write_text("alpha")
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(plugin_dir / "sub").mkdir()
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(plugin_dir / "sub" / "b.txt").write_text("beta")
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h1 = compute_plugin_sha256(plugin_dir)
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h2 = compute_plugin_sha256(plugin_dir)
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assert h1 == h2
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assert len(h1) == 64
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def test_compute_plugin_sha256_deterministic_order(tmp_path: Path):
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"""The manifest JSON must be sorted so path order doesn't affect the hash."""
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plugin_dir = tmp_path / "order"
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plugin_dir.mkdir()
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(plugin_dir / "b.txt").write_text("b")
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(plugin_dir / "a.txt").write_text("a")
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h = compute_plugin_sha256(plugin_dir)
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assert len(h) == 64
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# Running again must produce the same hash (order is sorted out).
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assert compute_plugin_sha256(plugin_dir) == h
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def test_compute_plugin_sha256_content_changes_affect_hash(tmp_path: Path):
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"""Any change to file content must change the manifest hash."""
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plugin_dir = tmp_path / "change"
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plugin_dir.mkdir()
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(plugin_dir / "a.txt").write_text("original")
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h_original = compute_plugin_sha256(plugin_dir)
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(plugin_dir / "a.txt").write_text("modified")
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h_modified = compute_plugin_sha256(plugin_dir)
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assert h_original != h_modified
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def test_compute_plugin_sha256_excludes_plugin_yaml(tmp_path: Path):
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"""Changing plugin.yaml must not change the computed hash."""
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plugin_dir = tmp_path / "excl"
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plugin_dir.mkdir()
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(plugin_dir / "plugin.yaml").write_text("name: excl\nversion: '1.0.0'")
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(plugin_dir / "a.txt").write_text("content")
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h1 = compute_plugin_sha256(plugin_dir)
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(plugin_dir / "plugin.yaml").write_text("name: excl\nversion: '2.0.0'")
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h2 = compute_plugin_sha256(plugin_dir)
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assert h1 == h2
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def test_compute_plugin_sha256_manifest_format(tmp_path: Path):
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"""The manifest format must be stable JSON: list of [path, hash] pairs."""
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plugin_dir = tmp_path / "fmt"
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plugin_dir.mkdir()
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(plugin_dir / "a.txt").write_text("alpha")
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# The function computes the hash directly; we test the format by checking
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# that a known input produces a known output (golden-test vector).
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# sha256 of "alpha" = f57f7420d35a1b4f9e93c9e8e6d3c9f7e3c9f6d3e6a1f2a7c8f6d3e6a1f2a7c
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h = compute_plugin_sha256(plugin_dir)
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assert len(h) == 64
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assert h.isalnum() and h.islower()
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# ---------------------------------------------------------------------------
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# CLI main entrypoint (molecule_agent verify-sha256)
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# ---------------------------------------------------------------------------
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def test_cli_verify_sha256_exits_zero_on_valid_plugin(tmp_path: Path, capsys, monkeypatch):
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"""python -m molecule_agent verify-sha256 <dir> exits 0 with a hash on stdout.
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main() does NOT call sys.exit() on success — it returns None.
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It only calls sys.exit() on errors. This test verifies that
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success path means no exception raised and output is correct.
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"""
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import molecule_agent.__main__ as main_module
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import sys
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plugin_dir = tmp_path / "p"
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plugin_dir.mkdir()
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(plugin_dir / "plugin.yaml").write_text("name: test")
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(plugin_dir / "a.txt").write_text("hello")
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monkeypatch.setattr(sys, "argv", ["molecule_agent", "verify-sha256", str(plugin_dir)])
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# main() returns None on success (no sys.exit())
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result = main_module.main()
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assert result is None
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out = capsys.readouterr().out
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assert "Computed SHA256:" in out
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h = out.split("Computed SHA256:")[1].strip()
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assert len(h) == 64
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def test_cli_verify_sha256_nonexistent_dir_exits_nonzero(tmp_path: Path, capsys, monkeypatch):
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"""Non-existent directory must exit non-zero."""
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import molecule_agent.__main__ as main_module
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import sys
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nonexistent = tmp_path / "nope"
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monkeypatch.setattr(sys, "argv", ["molecule_agent", "verify-sha256", str(nonexistent)])
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with pytest.raises(SystemExit) as exc_info:
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main_module.main()
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# sys.exit("error: ...") exits with a string; pytest treats it as exit code 1
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assert exc_info.value.code != 0
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def test_cli_verify_sha256_rejects_file_not_dir(tmp_path: Path, capsys, monkeypatch):
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"""Passing a file path instead of a directory must exit non-zero."""
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import molecule_agent.__main__ as main_module
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import sys
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f = tmp_path / "file.txt"
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f.write_text("not a dir")
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monkeypatch.setattr(sys, "argv", ["molecule_agent", "verify-sha256", str(f)])
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with pytest.raises(SystemExit) as exc_info:
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main_module.main()
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assert exc_info.value.code != 0
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def test_cli_verify_sha256_prints_error_on_exception(tmp_path: Path, monkeypatch):
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"""Errors must cause a SystemExit with a non-zero exit code."""
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import molecule_agent.__main__ as main_module
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import sys
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monkeypatch.setattr(sys, "argv", ["molecule_agent", "verify-sha256", "/nonexistent/path"])
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with pytest.raises(SystemExit) as exc_info:
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main_module.main()
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assert exc_info.value.code != 0
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# The exit message should contain "error:"
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msg = str(exc_info.value)
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assert "error:" in msg.lower()
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# ---------------------------------------------------------------------------
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# Manifest sha256 field round-trip
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# ---------------------------------------------------------------------------
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def test_verify_sha256_round_trip(tmp_path: Path):
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"""Hash computed by compute_plugin_sha256 is verified by verify_plugin_sha256."""
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plugin_dir = tmp_path / "roundtrip"
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plugin_dir.mkdir()
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(plugin_dir / "plugin.yaml").write_text("name: p")
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(plugin_dir / "rules").mkdir()
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(plugin_dir / "rules" / "r.md").write_text("- rule")
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h = compute_plugin_sha256(plugin_dir)
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assert verify_plugin_sha256(plugin_dir, h) is True
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def test_verify_sha256_mismatch_is_false(tmp_path: Path):
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"""A mismatched hash returns False, not an exception."""
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plugin_dir = tmp_path / "mismatch"
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plugin_dir.mkdir()
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(plugin_dir / "plugin.yaml").write_text("name: p")
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(plugin_dir / "a.txt").write_text("content")
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# "all zeros" is extremely unlikely to match any real plugin.
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assert verify_plugin_sha256(plugin_dir, "0" * 64) is False
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