llama-stack-mirror/tests/unit/providers/agents/test_persistence_access_control.py
Akram Ben Aissi f4950f4ef0
fix: AccessDeniedError leads to HTTP 500 instead of error 403 (#2595)
Resolves access control error visibility issues where 500 errors were
returned instead of proper 403 responses with actionable error messages.

• Enhance AccessDeniedError with detailed context and improve exception
handling
• Enhanced AccessDeniedError class to include user, action, and resource
context
  - Added constructor parameters for action, resource, and user
- Generate detailed error messages showing user principal, attributes,
and attempted resource
- Backward compatible with existing usage (falls back to generic
message)

• Updated exception handling in server.py
  - Import AccessDeniedError from access_control module
  - Return proper 403 status codes with detailed error messages
- Separate handling for PermissionError (generic) vs AccessDeniedError
(detailed)

• Enhanced error context at raise sites
- Updated routing_tables/common.py to pass action, resource, and user
context
- Updated agents persistence to include context in access denied errors
  - Provides better debugging information for access control issues

• Added comprehensive unit tests
  - Created tests/unit/server/test_server.py with 13 test cases
  - Covers AccessDeniedError with and without context
- Tests all exception types (ValidationError, BadRequestError,
AuthenticationRequiredError, etc.)
  - Validates proper HTTP status codes and error message formats


# What does this PR do?
<!-- Provide a short summary of what this PR does and why. Link to
relevant issues if applicable. -->

<!-- If resolving an issue, uncomment and update the line below -->
<!-- Closes #[issue-number] -->

## Test Plan

```
server:
  port: 8321
    access_policy:
    - permit:
        principal: admin
        actions: [create, read, delete]
        when: user with admin in groups
    - permit:
        actions: [read]
        when: user with system:authenticated in roles
```
then:

```
curl --request POST --url http://localhost:8321/v1/vector-dbs \
  --header "Authorization: Bearer your-bearer" \
  --data '{
    "vector_db_id": "my_demo_vector_db",
    "embedding_model": "ibm-granite/granite-embedding-125m-english",
    "embedding_dimension": 768,
    "provider_id": "milvus"
  }'
 
```

depending if user is in group admin or not, you should get the
`AccessDeniedError`. Before this PR, this was leading to an error 500
and `Traceback` displayed in the logs.
After the PR, logs display a simpler error (unless DEBUG logging is set)
and a 403 Forbidden error is returned on the HTTP side.

---------

Signed-off-by: Akram Ben Aissi <<akram.benaissi@gmail.com>>
2025-07-03 10:50:49 -07:00

174 lines
6.5 KiB
Python

# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the terms described in the LICENSE file in
# the root directory of this source tree.
import uuid
from datetime import datetime
from unittest.mock import patch
import pytest
import pytest_asyncio
from llama_stack.apis.agents import Turn
from llama_stack.apis.inference import CompletionMessage, StopReason
from llama_stack.distribution.datatypes import User
from llama_stack.providers.inline.agents.meta_reference.persistence import AgentPersistence, AgentSessionInfo
@pytest_asyncio.fixture
async def test_setup(sqlite_kvstore):
agent_persistence = AgentPersistence(agent_id="test_agent", kvstore=sqlite_kvstore, policy={})
yield agent_persistence
@pytest.mark.asyncio
@patch("llama_stack.providers.inline.agents.meta_reference.persistence.get_authenticated_user")
async def test_session_creation_with_access_attributes(mock_get_authenticated_user, test_setup):
agent_persistence = test_setup
# Set creator's attributes for the session
creator_attributes = {"roles": ["researcher"], "teams": ["ai-team"]}
mock_get_authenticated_user.return_value = User("test_user", creator_attributes)
# Create a session
session_id = await agent_persistence.create_session("Test Session")
# Get the session and verify access attributes were set
session_info = await agent_persistence.get_session_info(session_id)
assert session_info is not None
assert session_info.owner is not None
assert session_info.owner.attributes is not None
assert session_info.owner.attributes["roles"] == ["researcher"]
assert session_info.owner.attributes["teams"] == ["ai-team"]
@pytest.mark.asyncio
@patch("llama_stack.providers.inline.agents.meta_reference.persistence.get_authenticated_user")
async def test_session_access_control(mock_get_authenticated_user, test_setup):
agent_persistence = test_setup
# Create a session with specific access attributes
session_id = str(uuid.uuid4())
session_info = AgentSessionInfo(
session_id=session_id,
session_name="Restricted Session",
started_at=datetime.now(),
owner=User("someone", {"roles": ["admin"], "teams": ["security-team"]}),
turns=[],
identifier="Restricted Session",
)
await agent_persistence.kvstore.set(
key=f"session:{agent_persistence.agent_id}:{session_id}",
value=session_info.model_dump_json(),
)
# User with matching attributes can access
mock_get_authenticated_user.return_value = User(
"testuser", {"roles": ["admin", "user"], "teams": ["security-team", "other-team"]}
)
retrieved_session = await agent_persistence.get_session_info(session_id)
assert retrieved_session is not None
assert retrieved_session.session_id == session_id
# User without matching attributes cannot access
mock_get_authenticated_user.return_value = User("testuser", {"roles": ["user"], "teams": ["other-team"]})
retrieved_session = await agent_persistence.get_session_info(session_id)
assert retrieved_session is None
@pytest.mark.asyncio
@patch("llama_stack.providers.inline.agents.meta_reference.persistence.get_authenticated_user")
async def test_turn_access_control(mock_get_authenticated_user, test_setup):
agent_persistence = test_setup
# Create a session with restricted access
session_id = str(uuid.uuid4())
session_info = AgentSessionInfo(
session_id=session_id,
session_name="Restricted Session",
started_at=datetime.now(),
owner=User("someone", {"roles": ["admin"]}),
turns=[],
identifier="Restricted Session",
)
await agent_persistence.kvstore.set(
key=f"session:{agent_persistence.agent_id}:{session_id}",
value=session_info.model_dump_json(),
)
# Create a turn for this session
turn_id = str(uuid.uuid4())
turn = Turn(
session_id=session_id,
turn_id=turn_id,
steps=[],
started_at=datetime.now(),
input_messages=[],
output_message=CompletionMessage(
content="Hello",
stop_reason=StopReason.end_of_turn,
),
)
# Admin can add turn
mock_get_authenticated_user.return_value = User("testuser", {"roles": ["admin"]})
await agent_persistence.add_turn_to_session(session_id, turn)
# Admin can get turn
retrieved_turn = await agent_persistence.get_session_turn(session_id, turn_id)
assert retrieved_turn is not None
assert retrieved_turn.turn_id == turn_id
# Regular user cannot get turn
mock_get_authenticated_user.return_value = User("testuser", {"roles": ["user"]})
with pytest.raises(ValueError):
await agent_persistence.get_session_turn(session_id, turn_id)
# Regular user cannot get turns for session
with pytest.raises(ValueError):
await agent_persistence.get_session_turns(session_id)
@pytest.mark.asyncio
@patch("llama_stack.providers.inline.agents.meta_reference.persistence.get_authenticated_user")
async def test_tool_call_and_infer_iters_access_control(mock_get_authenticated_user, test_setup):
agent_persistence = test_setup
# Create a session with restricted access
session_id = str(uuid.uuid4())
session_info = AgentSessionInfo(
session_id=session_id,
session_name="Restricted Session",
started_at=datetime.now(),
owner=User("someone", {"roles": ["admin"]}),
turns=[],
identifier="Restricted Session",
)
await agent_persistence.kvstore.set(
key=f"session:{agent_persistence.agent_id}:{session_id}",
value=session_info.model_dump_json(),
)
turn_id = str(uuid.uuid4())
# Admin user can set inference iterations
mock_get_authenticated_user.return_value = User("testuser", {"roles": ["admin"]})
await agent_persistence.set_num_infer_iters_in_turn(session_id, turn_id, 5)
# Admin user can get inference iterations
infer_iters = await agent_persistence.get_num_infer_iters_in_turn(session_id, turn_id)
assert infer_iters == 5
# Regular user cannot get inference iterations
mock_get_authenticated_user.return_value = User("testuser", {"roles": ["user"]})
infer_iters = await agent_persistence.get_num_infer_iters_in_turn(session_id, turn_id)
assert infer_iters is None
# Regular user cannot set inference iterations (should raise ValueError)
with pytest.raises(ValueError):
await agent_persistence.set_num_infer_iters_in_turn(session_id, turn_id, 10)