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"""
Multi-group isolation test: two groups on one QUIC server.
Verifies that:
- A user in group-a can fetch files from group-a
- A user in group-a is rejected when requesting group-b
- A user in both groups can access both
"""
import os
import time
import jwt
import pytest
from pathlib import Path
from cryptography.hazmat.primitives.asymmetric.ed25519 import Ed25519PrivateKey
from cryptography.hazmat.primitives import serialization
from meshbay_common.crypto import generate_gek, pk_to_b64
from meshbay_node.indexer import DirectoryIndexer
from conftest import one_root
from meshbay_node.transport.quic_server import QuicChunkServer
from meshbay_node.transport.quic_client import QuicChunkClient
@pytest.fixture
def sk_node():
return Ed25519PrivateKey.generate()
@pytest.fixture
def sk_hub():
return Ed25519PrivateKey.generate()
@pytest.fixture
def gek_a():
return generate_gek()
@pytest.fixture
def gek_b():
return generate_gek()
@pytest.fixture
def dir_a(tmp_path):
d = tmp_path / "group_a"
d.mkdir()
(d / "file_a.txt").write_bytes(b"content from group A " * 100)
return d
@pytest.fixture
def dir_b(tmp_path):
d = tmp_path / "group_b"
d.mkdir()
(d / "file_b.txt").write_bytes(b"content from group B " * 100)
return d
def make_jwt(sk_hub, pk_node_b64, groups, user_id="user-001", ttl=3600):
sk_pem = sk_hub.private_bytes(
serialization.Encoding.PEM,
serialization.PrivateFormat.PKCS8,
serialization.NoEncryption(),
)
now = int(time.time())
return jwt.encode({
"iss": "test-hub", "sub": user_id,
"pk_user": pk_node_b64, "hub_id": "test-hub",
"jti": "test-jti", "iat": now, "exp": now + ttl,
"groups": groups,
}, sk_pem, algorithm="EdDSA")
@pytest.fixture
async def multi_group_server(sk_node, sk_hub, gek_a, gek_b, dir_a, dir_b, tmp_path):
hub_pk_pem = sk_hub.public_key().public_bytes(
serialization.Encoding.PEM, serialization.PublicFormat.SubjectPublicKeyInfo)
indexer_a = DirectoryIndexer(roots=one_root(dir_a), group_id="group-a", sk_node=sk_node, gek=gek_a)
await indexer_a.initial_scan()
indexer_b = DirectoryIndexer(roots=one_root(dir_b), group_id="group-b", sk_node=sk_node, gek=gek_b)
await indexer_b.initial_scan()
# RootSet, not a bare Path — what the daemon actually puts in a group context.
# This held a Path until 2026-09-03 and nothing noticed: the QUIC index handler
# only called `index.serialize()`, and `entry_abs_path` fell through
# `Path.resolve(strict=...)`, reading the virtual path as a truthy flag and
# returning the right file by accident.
groups = {
"group-a": {"gek": gek_a, "roots": one_root(dir_a), "index": indexer_a.index},
"group-b": {"gek": gek_b, "roots": one_root(dir_b), "index": indexer_b.index},
}
cert_path = tmp_path / "node.crt"
key_path = tmp_path / "node.key"
server = QuicChunkServer(
sk_node=sk_node, hub_pk_pem=hub_pk_pem,
gek=gek_a, roots=one_root(dir_a), index=indexer_a.index,
host="127.0.0.1", port=19200,
cert_path=cert_path, key_path=key_path,
groups=groups,
)
await server.start()
yield server, indexer_a, indexer_b
await server.stop()
@pytest.mark.asyncio
async def test_user_can_access_own_group(
multi_group_server, sk_node, sk_hub, gek_a,
):
"""User in group-a can fetch index and chunks from group-a."""
server, indexer_a, _ = multi_group_server
token = make_jwt(sk_hub, pk_to_b64(sk_node.public_key()), groups=["group-a"])
async with QuicChunkClient(
host="127.0.0.1", port=19200,
jwt_token=token, gek=gek_a,
pk_node_b64=pk_to_b64(sk_node.public_key()),
group_id="group-a",
) as client:
msg = await client.fetch_index()
assert len(msg["entries"]) == 1
entry = msg["entries"][0]
assert entry["name"] == "file_a.txt"
chunk = await client.fetch_chunk(entry["id"], chunk_index=0)
assert chunk == b"content from group A " * 100
@pytest.mark.asyncio
async def test_user_rejected_from_other_group(
multi_group_server, sk_node, sk_hub, gek_b,
):
"""User in group-a only is rejected when requesting group-b."""
server, _, _ = multi_group_server
token = make_jwt(sk_hub, pk_to_b64(sk_node.public_key()), groups=["group-a"])
with pytest.raises(ConnectionError, match="rejected"):
async with QuicChunkClient(
host="127.0.0.1", port=19200,
jwt_token=token, gek=gek_b,
pk_node_b64=pk_to_b64(sk_node.public_key()),
group_id="group-b",
) as client:
await client.fetch_index()
@pytest.mark.asyncio
async def test_dual_group_user_accesses_both(
multi_group_server, sk_node, sk_hub, gek_a, gek_b,
):
"""User in both groups can access either group's files."""
server, indexer_a, indexer_b = multi_group_server
token = make_jwt(sk_hub, pk_to_b64(sk_node.public_key()), groups=["group-a", "group-b"])
async with QuicChunkClient(
host="127.0.0.1", port=19200,
jwt_token=token, gek=gek_a,
pk_node_b64=pk_to_b64(sk_node.public_key()),
group_id="group-a",
) as client_a:
msg_a = await client_a.fetch_index()
assert msg_a["entries"][0]["name"] == "file_a.txt"
async with QuicChunkClient(
host="127.0.0.1", port=19200,
jwt_token=token, gek=gek_b,
pk_node_b64=pk_to_b64(sk_node.public_key()),
group_id="group-b",
) as client_b:
msg_b = await client_b.fetch_index()
assert msg_b["entries"][0]["name"] == "file_b.txt"
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