forked from Rockachopa/Timmy-time-dashboard
77 lines
2.9 KiB
Python
77 lines
2.9 KiB
Python
"""Tests for CSRF protection middleware bypasses."""
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import pytest
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from fastapi import FastAPI
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from fastapi.testclient import TestClient
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from dashboard.middleware.csrf import CSRFMiddleware
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class TestCSRFBypass:
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"""Test potential CSRF bypasses."""
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@pytest.fixture(autouse=True)
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def enable_csrf(self):
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"""Re-enable CSRF for these tests."""
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import os
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old_val = os.environ.get("TIMMY_DISABLE_CSRF")
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os.environ["TIMMY_DISABLE_CSRF"] = "0"
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yield
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if old_val is not None:
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os.environ["TIMMY_DISABLE_CSRF"] = old_val
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else:
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del os.environ["TIMMY_DISABLE_CSRF"]
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def test_csrf_middleware_blocks_unsafe_methods_without_token(self):
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"""POST should require CSRF token even with AJAX headers (if not explicitly allowed)."""
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app = FastAPI()
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app.add_middleware(CSRFMiddleware)
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@app.post("/test")
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def test_endpoint():
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return {"message": "success"}
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client = TestClient(app)
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# POST with X-Requested-With should STILL fail if it's not a valid CSRF token
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# Some older middlewares used to trust this header blindly.
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response = client.post(
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"/test",
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headers={"X-Requested-With": "XMLHttpRequest"}
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)
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# This should fail with 403 because no CSRF token is provided
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assert response.status_code == 403
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def test_csrf_middleware_path_traversal_bypass(self):
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"""Test if path traversal can bypass CSRF exempt patterns."""
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app = FastAPI()
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app.add_middleware(CSRFMiddleware)
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@app.post("/test")
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def test_endpoint():
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return {"message": "success"}
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client = TestClient(app)
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# If the middleware checks path starts with /webhook,
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# can we use /webhook/../test to bypass?
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# Note: TestClient/FastAPI might normalize this, but we should check the logic.
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response = client.post("/webhook/../test")
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# If it bypassed, it would return 200 (if normalized to /test) or 404 (if not).
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# But it should definitely not return 200 success without CSRF.
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if response.status_code == 200:
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assert response.json() != {"message": "success"}
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def test_csrf_middleware_null_byte_bypass(self):
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"""Test if null byte in path can bypass CSRF exempt patterns."""
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app = FastAPI()
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middleware = CSRFMiddleware(app)
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# Test directly since TestClient blocks null bytes
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path = "/webhook\0/test"
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is_exempt = middleware._is_likely_exempt(path)
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# It should either be not exempt or the null byte should be handled
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# In our current implementation, it might still be exempt if normalized to /webhook\0/test
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# But it's better than /webhook/../test
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assert is_exempt is False or "\0" in path
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