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Mateusz
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fix(gemini): use Windows persistent env fallback and numbered-key precedence for GEMINI_API_KEY
The gemini backend was reading GEMINI_API_KEY directly from the process environment, which on Windows can contain stale values from previous sessions. This caused leaked/disabled API keys to be sent instead of fresh GEMINI_API_KEY_1..N numbered variants. Changes: - from_env_part3.py: replace raw env.get(GEMINI_API_KEY) with get_env_value_with_windows_persistent_fallback() and guard with _has_numbered_env_variants() so numbered keys take precedence - When GEMINI_API_KEY_1..N exist, the base gemini backend no longer binds GEMINI_API_KEY, preventing stale keys from being used - Add 17 regression tests covering Windows fallback, numbered-key discovery, precedence, and end-to-end integration
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Lines changed: 824 additions & 2 deletions

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‎dev/scripts/demo_gemini_api_key_loading_fix.py‎

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"""Demo script proving the Gemini API key loading fix.
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Simulates the exact production bug:
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- Stale GEMINI_API_KEY in process env (old leaked key)
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- Fresh GEMINI_API_KEY_1..3 set (never used, cannot leak)
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Demonstrates that:
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1. Without the fix: proxy would send the stale leaked key
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2. With the fix: proxy correctly uses the numbered instances
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Run: .venv/Scripts/python.exe dev/scripts/demo_gemini_api_key_loading_fix.py
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"""
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from __future__ import annotations
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import sys
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from pathlib import Path
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from types import SimpleNamespace
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from unittest.mock import patch
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_project_root = Path(__file__).resolve().parents[2]
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if str(_project_root) not in sys.path:
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sys.path.insert(0, str(_project_root))
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# ── Test data ──────────────────────────────────────────────────────────────
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OLD_LEAKED_KEY = "AIzaSy-old-leaked-key-disabled-by-google"
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FRESH_KEY_1 = "AIzaSy-fresh-never-used-1"
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FRESH_KEY_2 = "AIzaSy-fresh-never-used-2"
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FRESH_KEY_3 = "AIzaSy-fresh-never-used-3"
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def _simulate_windows_env(monkeypatch, stale_key: str | None) -> None:
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"""Set up a fake Windows registry with a stale key different from process env."""
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monkeypatch.setattr(sys, "platform", "win32")
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# Registry has a different key than process env
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registry_key = OLD_LEAKED_KEY if stale_key is None else stale_key
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class _Key:
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def __init__(self, hive: str, subkey: str) -> None:
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self.hive = hive
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self.subkey = subkey
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def __enter__(self) -> "_Key":
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return self
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def __exit__(self, exc_type, exc, tb) -> None:
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return None
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def _query(key: _Key, name: str) -> tuple[str, int]:
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if name == "GEMINI_API_KEY":
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return (registry_key, 1)
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raise OSError("not found")
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fake_winreg = SimpleNamespace(
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HKEY_CURRENT_USER="HKCU",
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HKEY_LOCAL_MACHINE="HKLM",
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OpenKey=lambda hive, subkey: _Key(hive, subkey),
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QueryValueEx=_query,
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)
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monkeypatch.setitem(sys.modules, "winreg", fake_winreg)
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def demo_broken_scenario(monkeypatch) -> None:
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"""Show what the OLD code would do: pick the stale leaked key."""
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print("=" * 72)
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print("SCENARIO 1: OLD behavior (broken) - raw env.get('GEMINI_API_KEY')")
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print("=" * 72)
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env = {
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"LLM_BACKEND": "gemini",
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"GEMINI_API_KEY": OLD_LEAKED_KEY,
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"GEMINI_API_KEY_1": FRESH_KEY_1,
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"GEMINI_API_KEY_2": FRESH_KEY_2,
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"GEMINI_API_KEY_3": FRESH_KEY_3,
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}
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_simulate_windows_env(monkeypatch, stale_key=OLD_LEAKED_KEY)
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# Simulate old broken code path
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if env.get("GEMINI_API_KEY"):
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picked_key = env["GEMINI_API_KEY"]
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print(f" Raw env.get('GEMINI_API_KEY') returned: {picked_key[:30]}...")
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print(f" This is the LEAKED, DISABLED key!")
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print(f" Result: Remote API would reject this key with 403")
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print()
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assert picked_key == OLD_LEAKED_KEY
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print(f" FAIL: Proxy would send stale key: {picked_key[:20]}***")
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print()
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def demo_fixed_scenario(monkeypatch) -> None:
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"""Show what the NEW code does: ignores stale key when numbered variants exist."""
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print("=" * 72)
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print("SCENARIO 2: NEW behavior (fixed) - Windows fallback + numbered guard")
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print("=" * 72)
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env = {
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"LLM_BACKEND": "gemini",
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"GEMINI_API_KEY": OLD_LEAKED_KEY,
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"GEMINI_API_KEY_1": FRESH_KEY_1,
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"GEMINI_API_KEY_2": FRESH_KEY_2,
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"GEMINI_API_KEY_3": FRESH_KEY_3,
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}
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_simulate_windows_env(monkeypatch, stale_key=OLD_LEAKED_KEY)
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# Simulate fixed code path
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from src.core.common.env_utils import get_env_value_with_windows_persistent_fallback
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import src.core.config.env.from_env_part3 as _part3
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gemini_key, gemini_source = get_env_value_with_windows_persistent_fallback(
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"GEMINI_API_KEY", environ=env
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)
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has_variants = _part3._has_numbered_env_variants(env, "GEMINI_API_KEY") # noqa: SLF001
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print(f" Windows fallback resolved key from: {gemini_source}")
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print(f" Numbered variants exist: {has_variants}")
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print()
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if gemini_key and not has_variants:
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print(f" Would bind base gemini with key: {gemini_key[:30]}...")
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else:
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print(f" Numbered variants present => skipping base key binding")
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print(f" Instances will be created from numbered keys instead:")
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print(f" gemini.1 => {FRESH_KEY_1[:20]}...")
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print(f" gemini.2 => {FRESH_KEY_2[:20]}...")
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print(f" gemini.3 => {FRESH_KEY_3[:20]}...")
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print()
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print(f" PASS: Stale leaked key is correctly ignored")
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print()
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def demo_full_integration(monkeypatch) -> None:
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"""Full AppConfig.from_env integration test."""
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print("=" * 72)
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print("SCENARIO 3: Full integration - AppConfig.from_env with numbered keys")
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print("=" * 72)
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env = {
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"LLM_BACKEND": "gemini",
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"GEMINI_API_KEY": OLD_LEAKED_KEY,
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"GEMINI_API_KEY_1": FRESH_KEY_1,
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"GEMINI_API_KEY_2": FRESH_KEY_2,
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"GEMINI_API_KEY_3": FRESH_KEY_3,
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}
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with (
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patch(
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"src.core.config.sources.backend_instances.backend_registry.get_registered_backends",
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return_value=["gemini"],
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),
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patch(
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"src.core.config.models.backends.backend_registry.get_registered_backends",
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return_value=["gemini"],
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),
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):
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from src.core.config.app_config import AppConfig
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cfg = AppConfig.from_env(environ=env)
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base_cfg = cfg.backends.lookup("gemini")
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instance_1 = cfg.backends.lookup("gemini.1")
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instance_2 = cfg.backends.lookup("gemini.2")
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instance_3 = cfg.backends.lookup("gemini.3")
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print(f" Backends discovered:")
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if base_cfg is not None:
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print(f" gemini (base) => api_key: {base_cfg.api_key or 'None'}")
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else:
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print(f" gemini (base) => not bound (correct!)")
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if instance_1 and instance_1.api_key:
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print(f" gemini.1 => api_key: {instance_1.api_key[:20]}...")
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if instance_2 and instance_2.api_key:
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print(f" gemini.2 => api_key: {instance_2.api_key[:20]}...")
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if instance_3 and instance_3.api_key:
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print(f" gemini.3 => api_key: {instance_3.api_key[:20]}...")
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print()
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# Verify invariants
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errors = []
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if base_cfg is not None and base_cfg.api_key == OLD_LEAKED_KEY:
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errors.append("CRITICAL: base gemini still has the leaked key!")
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if not instance_1:
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errors.append("gemini.1 instance missing")
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elif instance_1.api_key != FRESH_KEY_1:
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assert instance_1.api_key is not None
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errors.append(f"gemini.1 has wrong key: {instance_1.api_key[:20]}...")
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if not instance_2:
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errors.append("gemini.2 instance missing")
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elif instance_2.api_key != FRESH_KEY_2:
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assert instance_2.api_key is not None
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errors.append(f"gemini.2 has wrong key: {instance_2.api_key[:20]}...")
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if not instance_3:
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errors.append("gemini.3 instance missing")
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elif instance_3.api_key != FRESH_KEY_3:
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assert instance_3.api_key is not None
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errors.append(f"gemini.3 has wrong key: {instance_3.api_key[:20]}...")
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if errors:
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for e in errors:
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print(f" FAIL: {e}")
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else:
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print(" PASS: All invariants hold - numbered instances are correct,")
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print(" stale base key is ignored")
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print()
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def demo_single_base_key_only(monkeypatch) -> None:
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"""When only GEMINI_API_KEY is set, it should still work."""
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print("=" * 72)
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print("SCENARIO 4: Only GEMINI_API_KEY set (no numbered variants)")
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print("=" * 72)
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env = {
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"LLM_BACKEND": "gemini",
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"GEMINI_API_KEY": FRESH_KEY_1,
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}
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with (
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patch(
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"src.core.config.sources.backend_instances.backend_registry.get_registered_backends",
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return_value=["gemini"],
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),
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patch(
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"src.core.config.models.backends.backend_registry.get_registered_backends",
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return_value=["gemini"],
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),
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):
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from src.core.config.app_config import AppConfig
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cfg = AppConfig.from_env(environ=env)
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base_cfg = cfg.backends.lookup("gemini")
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instance_1 = cfg.backends.lookup("gemini.1")
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print(f" gemini (base) => api_key: {base_cfg.api_key[:20] if base_cfg and base_cfg.api_key else 'None'}...")
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print(f" gemini.1 => {'present' if instance_1 else 'not created'}")
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print()
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if base_cfg and base_cfg.api_key == FRESH_KEY_1 and instance_1 is None:
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print(" PASS: Single base key works correctly")
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else:
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print(" FAIL: Expected base key binding with no numbered instances")
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print()
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def demo_single_numbered_key_only(monkeypatch) -> None:
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"""When only GEMINI_API_KEY_1 is set, only gemini.1 should be created."""
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print("=" * 72)
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print("SCENARIO 5: Only GEMINI_API_KEY_1 set (no base key)")
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print("=" * 72)
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env = {
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"LLM_BACKEND": "gemini",
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"GEMINI_API_KEY_1": FRESH_KEY_1,
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}
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with (
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patch(
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"src.core.config.sources.backend_instances.backend_registry.get_registered_backends",
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return_value=["gemini"],
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),
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patch(
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"src.core.config.models.backends.backend_registry.get_registered_backends",
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return_value=["gemini"],
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),
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):
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from src.core.config.app_config import AppConfig
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cfg = AppConfig.from_env(environ=env)
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base_cfg = cfg.backends.lookup("gemini")
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instance_1 = cfg.backends.lookup("gemini.1")
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print(f" gemini (base) => api_key: {base_cfg.api_key[:20] if base_cfg and base_cfg.api_key else 'None'}...")
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print(f" gemini.1 => api_key: {instance_1.api_key[:20] if instance_1 and instance_1.api_key else 'None'}...")
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print()
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has_base_key = base_cfg and base_cfg.api_key and base_cfg.api_key != OLD_LEAKED_KEY
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has_instance_1 = instance_1 and instance_1.api_key == FRESH_KEY_1
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if has_instance_1:
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print(" PASS: Single numbered key creates correct instance")
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if has_base_key:
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print(" Note: base key also set (acceptable, will be from env fallback)")
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else:
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print(" FAIL: Expected gemini.1 instance")
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print()
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# ── Main ───────────────────────────────────────────────────────────────────
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def main() -> None:
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print()
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print("*" * 72)
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print("* Gemini API Key Loading Fix - Demonstration")
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print("*" * 72)
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print()
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# We use a simple monkeypatch approach
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import sys as _sys
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saved_modules = {}
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def _run(scenario_fn) -> None:
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"""Run a scenario with isolated module state."""
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# Remove winreg if present from previous run
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saved_modules["winreg"] = _sys.modules.get("winreg")
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saved_modules["platform"] = _sys.modules.get("platform")
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scenario_fn(_Monkeypatch())
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# Cleanup
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if "winreg" in _sys.modules:
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del _sys.modules["winreg"]
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if saved_modules["winreg"] is not None:
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_sys.modules["winreg"] = saved_modules["winreg"]
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_run(demo_broken_scenario)
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_run(demo_fixed_scenario)
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_run(demo_full_integration)
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_run(demo_single_base_key_only)
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_run(demo_single_numbered_key_only)
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print("*" * 72)
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print("* Demonstration complete")
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print("*" * 72)
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print()
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class _Monkeypatch:
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"""Minimal monkeypatch implementation for the demo."""
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def setattr(self, obj: object, name: str, value: object) -> None:
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setattr(obj, name, value)
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def setitem(self, mapping: dict, key: str, value: object) -> None:
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mapping[key] = value
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if __name__ == "__main__":
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main()

‎src/core/config/env/from_env_part3.py‎

Lines changed: 12 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -137,9 +137,19 @@ def apply_config_part3(
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origin="OPENROUTER_API_KEY",
138138
)
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140-
if env.get("GEMINI_API_KEY"):
140+
gemini_key, gemini_key_source = get_env_value_with_windows_persistent_fallback(
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"GEMINI_API_KEY", environ=env
142+
)
143+
if gemini_key and not _has_numbered_env_variants(env, "GEMINI_API_KEY"):
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if logger.isEnabledFor(logging.INFO):
145+
logger.info(
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"Gemini key diagnostics [from_env_part3]: env_type=%s source=%s",
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type(env).__name__,
148+
gemini_key_source,
149+
)
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141151
config_backends["gemini"] = config_backends.get("gemini", {})
142-
config_backends["gemini"]["api_key"] = env["GEMINI_API_KEY"]
152+
config_backends["gemini"]["api_key"] = gemini_key
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config_backends["gemini"]["api_url"] = _get_env_value(
144154
env,
145155
"GEMINI_API_BASE_URL",

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