fix(extension): 收紧插件密钥与命令清单边界

backend/README.md

@@ -23,7 +23,7 @@ uv run uvicorn app.main:app --reload --host 127.0.0.1 --port 8000
 uv run pytest
 ```
 
-当前基线为 103 项测试通过。Provider API Key 可通过前端设置页写入，也可用 `OPENAI_API_KEY`、`DEEPSEEK_API_KEY` 或 `AINOTE_CREDENTIAL_<ID>` 注入；不要把真实密钥写入仓库。
+当前基线为 107 项测试通过。Provider API Key 可通过前端设置页写入，也可用 `OPENAI_API_KEY`、`DEEPSEEK_API_KEY` 或 `AINOTE_CREDENTIAL_<ID>` 注入；不要把真实密钥写入仓库。`plugin.*` 是 Plugin Settings 的保留凭据命名空间，通用 Provider 凭据接口不能读写。
 
 团队接口清单见 `../docs/contracts/后端接口契约-开发版.md`，机器可读契约以运行时的 `/openapi.json` 为准。
 

backend/app/extensions/contributions.py

@@ -73,6 +73,7 @@ class PluginCommandSpec(BaseModel):
         }
     )
     permission: str | None = None
+    secrets: list[str] = Field(default_factory=list)
     handler: Literal["echo", "uppercase_selection"]
     timeout_seconds: int = Field(default=30, ge=1, le=120)
 
@@ -81,6 +82,7 @@ CommandExecutor = Callable[
     [dict[str, Any], dict[str, Any]],
     PluginCommandEffect | Awaitable[PluginCommandEffect],
 ]
+PluginSecretResolver = Callable[[str], str | None]
 
 
 @dataclass(slots=True)
@@ -656,6 +658,12 @@ def validate_command_spec(plugin_id: str, spec: PluginCommandSpec) -> None:
             "PLUGIN_COMMAND_INVALID",
             "Plugin command when/context entries must be unique.",
         )
+    if len(spec.secrets) != len(set(spec.secrets)):
+        raise ExtensionError(
+            "PLUGIN_COMMAND_INVALID",
+            "Plugin command Secret entries must be unique.",
+            details={"command_id": spec.command_id},
+        )
     unknown_when = sorted(set(spec.when) - _WHEN_TOKENS)
     if unknown_when:
         raise ExtensionError(

backend/app/extensions/runtime.py

@@ -24,6 +24,7 @@ from app.contracts import (
     PluginManifest,
     PluginHostStatus,
     PluginSecretStatus,
+    PluginSettingType,
     PluginSettingsSchema,
     PluginStatus,
     RetrievalConfig,
@@ -35,6 +36,7 @@ from app.contracts import (
 from app.extensions.contributions import (
     CommandRegistry,
     PluginCommandSpec,
+    PluginSecretResolver,
     PluginSettingsDefinition,
     PluginSettingsStore,
     validate_command_spec,
@@ -245,6 +247,7 @@ class DeclarativePluginHost:
         arguments: dict[str, Any],
         context: dict[str, Any],
         settings: dict[str, Any],
+        resolve_secret: PluginSecretResolver,
     ) -> PluginCommandEffect:
         """执行宿主内置的白名单 Command handler，不导入 Plugin Python 代码。"""
 
@@ -381,6 +384,32 @@ class PluginRuntime:
             )
         if settings_definition is not None:
             validate_settings_definition(manifest.plugin_id, settings_definition)
+        secret_fields = (
+            {
+                field.key
+                for field in settings_definition.fields
+                if field.type == PluginSettingType.secret
+            }
+            if settings_definition is not None
+            else set()
+        )
+        for spec in command_specs:
+            unknown_secrets = sorted(set(spec.secrets) - secret_fields)
+            if unknown_secrets:
+                raise ExtensionError(
+                    "PLUGIN_COMMAND_INVALID",
+                    "Plugin command references undeclared Secret settings.",
+                    details={
+                        "command_id": spec.command_id,
+                        "secrets": unknown_secrets,
+                    },
+                )
+            if spec.secrets and "secrets.use" not in manifest.permissions:
+                raise ExtensionError(
+                    "PLUGIN_PERMISSION_UNDECLARED",
+                    "Commands using Secret settings require the secrets.use permission.",
+                    details={"command_id": spec.command_id},
+                )
 
         record = _PluginRecord(
             plugin=Plugin(
@@ -502,6 +531,16 @@ class PluginRuntime:
                     _spec: PluginCommandSpec = spec,
                     _record: _PluginRecord = record,
                 ) -> PluginCommandEffect:
+                    if (
+                        not _record.plugin.enabled
+                        or _record.plugin.status != PluginStatus.ready
+                    ):
+                        raise ExtensionError(
+                            "PLUGIN_COMMAND_NOT_FOUND",
+                            "Plugin command is not available while its Plugin is inactive.",
+                            status_code=404,
+                            details={"command_id": _spec.command_id},
+                        )
                     settings = (
                         self.settings.get(
                             _record.plugin.manifest.plugin_id,
@@ -510,8 +549,38 @@ class PluginRuntime:
                         if _record.settings_definition is not None
                         else {}
                     )
+                    def resolve_secret(key: str) -> str | None:
+                        if key not in _spec.secrets:
+                            raise ExtensionError(
+                                "PLUGIN_SECRET_ACCESS_DENIED",
+                                "Command cannot access an undeclared Plugin Secret.",
+                                status_code=403,
+                                details={
+                                    "command_id": _spec.command_id,
+                                    "key": key,
+                                },
+                            )
+                        if "secrets.use" not in _record.plugin.granted_permissions:
+                            raise ExtensionError(
+                                "PLUGIN_SECRET_ACCESS_DENIED",
+                                "Plugin no longer has permission to access Secret settings.",
+                                status_code=403,
+                                details={"command_id": _spec.command_id, "key": key},
+                            )
+                        if _record.settings_definition is None:
+                            return None
+                        return self.settings.resolve_secret(
+                            _record.plugin.manifest.plugin_id,
+                            _record.settings_definition,
+                            key,
+                        )
+
                     return await self.host.execute_command(
-                        _spec.handler, arguments, context, settings
+                        _spec.handler,
+                        arguments,
+                        context,
+                        settings,
+                        resolve_secret,
                     )
 
                 self.commands.register(plugin_id, spec, command_executor)
@@ -782,10 +851,16 @@ class PluginRuntime:
         if not path.exists():
             return []
         raw = _read_yaml(path)
+        items = raw.get("commands", [])
+        if not isinstance(items, list):
+            raise ExtensionError(
+                "EXTENSION_MANIFEST_INVALID",
+                "Invalid plugin command manifest: commands must be an array.",
+            )
         try:
             return [
                 PluginCommandSpec.model_validate(item)
-                for item in raw.get("commands", [])
+                for item in items
             ]
         except ValidationError as exc:
             raise _manifest_error("plugin command", exc) from exc

backend/app/providers/credentials.py

@@ -13,6 +13,7 @@ from app.config import get_settings
 
 
 _CREDENTIAL_ID = re.compile(r"^[A-Za-z0-9][A-Za-z0-9._-]{0,127}$")
+_PLUGIN_CREDENTIAL_PREFIX = "plugin."
 
 
 class CredentialStoreError(RuntimeError):
@@ -23,6 +24,15 @@ class CredentialResolver(Protocol):
     def resolve(self, credential_id: str | None) -> str | None: ...
 
 
+def validate_provider_credential_id(credential_id: str | None) -> None:
+    """阻止 Provider 和通用凭据 API 跨入 Plugin 私有命名空间。"""
+
+    if credential_id and credential_id.casefold().startswith(
+        _PLUGIN_CREDENTIAL_PREFIX
+    ):
+        raise CredentialStoreError("Credential namespace is reserved for Plugin settings.")
+
+
 class EnvironmentCredentialResolver:
     """解析由桌面 Host 注入 Sidecar 进程的临时凭证上下文。"""
 
@@ -170,3 +180,14 @@ class ChainedCredentialResolver:
             if value:
                 return value
         return None
+
+
+class ProviderCredentialResolver:
+    """Provider 专用防御层，避免配置绕过 HTTP 校验读取 Plugin Secret。"""
+
+    def __init__(self, delegate: CredentialResolver) -> None:
+        self._delegate = delegate
+
+    def resolve(self, credential_id: str | None) -> str | None:
+        validate_provider_credential_id(credential_id)
+        return self._delegate.resolve(credential_id)

backend/app/providers/factory.py

@@ -1,6 +1,6 @@
 from app.contracts import ModelCapability, ProviderConfig, ProviderPreset, ProviderType
 from app.providers.base import ModelProvider
-from app.providers.credentials import CredentialResolver
+from app.providers.credentials import CredentialResolver, ProviderCredentialResolver
 from app.providers.ollama import OllamaProvider
 from app.providers.openai_compatible import OpenAICompatibleProvider
 
@@ -11,7 +11,9 @@ class UnsupportedProviderError(ValueError):
 
 class ProviderFactory:
     def __init__(self, credentials: CredentialResolver) -> None:
-        self.credentials = credentials
+        # ProviderFactory 是所有可配置 Provider 的创建边界，在此统一禁止
+        # Provider 借用 Plugin Secret 引用，避免调用方漏包安全 Resolver。
+        self.credentials = ProviderCredentialResolver(credentials)
 
     def build(self, config: ProviderConfig) -> ModelProvider:
         if config.provider_type in {

backend/app/routes.py

@@ -75,7 +75,10 @@ from app.extensions import ExtensionError
 from app.providers.registry import ProviderNotFoundError
 from app.providers.factory import UnsupportedProviderError
 from app.providers.base import ProviderError
-from app.providers.credentials import CredentialStoreError
+from app.providers.credentials import (
+    CredentialStoreError,
+    validate_provider_credential_id,
+)
 from app.retrieval.engine import engine
 from app.services import (
     index_service,
@@ -92,6 +95,13 @@ def utc_now() -> datetime:
     return datetime.now(timezone.utc)
 
 
+def validate_public_credential_id(credential_id: str | None) -> None:
+    try:
+        validate_provider_credential_id(credential_id)
+    except CredentialStoreError as exc:
+        raise ApiError(422, "CREDENTIAL_NAMESPACE_RESERVED", str(exc)) from exc
+
+
 def as_sse(event: str, payload: str, *, event_id: int | None = None) -> str:
     id_line = f"id: {event_id}\n" if event_id is not None else ""
     return f"{id_line}event: {event}\ndata: {payload}\n\n"
@@ -654,6 +664,7 @@ async def delete_plugin_setting_secret(
     tags=["Providers"],
 )
 async def get_credential_status(credential_id: str) -> CredentialStatus:
+    validate_public_credential_id(credential_id)
     try:
         configured = container.credentials.has(credential_id)
     except CredentialStoreError as exc:
@@ -669,6 +680,7 @@ async def get_credential_status(credential_id: str) -> CredentialStatus:
 async def put_credential(
     credential_id: str, request: CredentialWriteRequest
 ) -> CredentialStatus:
+    validate_public_credential_id(credential_id)
     try:
         container.credentials.put(credential_id, request.api_key.get_secret_value())
     except CredentialStoreError as exc:
@@ -682,6 +694,7 @@ async def put_credential(
     tags=["Providers"],
 )
 async def delete_credential(credential_id: str) -> CredentialStatus:
+    validate_public_credential_id(credential_id)
     try:
         container.credentials.delete(credential_id)
     except CredentialStoreError as exc:
@@ -718,6 +731,7 @@ async def get_provider(provider_id: str) -> ProviderConfig:
     tags=["Providers"],
 )
 async def create_provider(request: ProviderCreateRequest) -> ProviderConfig:
+    validate_public_credential_id(request.credential_id)
     config = ProviderConfig(
         provider_id=f"provider_{uuid4().hex}",
         provider_type=request.provider_type,
@@ -761,6 +775,8 @@ async def update_provider(
             "name and enabled cannot be null when explicitly provided.",
         )
     updates = {name: getattr(request, name) for name in fields}
+    if "credential_id" in fields:
+        validate_public_credential_id(request.credential_id)
     config = ProviderConfig.model_validate(
         {**current.model_dump(mode="python"), **updates}
     )
@@ -820,6 +836,7 @@ async def list_provider_models(provider_id: str) -> ProviderModelsResponse:
 async def test_provider(request: ProviderTestRequest) -> ProviderTestResponse:
     registered = configurable_provider_or_404(request.provider_id)
     if request.credential_context_id:
+        validate_public_credential_id(request.credential_context_id)
         temporary_config = registered.config.model_copy(
             update={"credential_id": request.credential_context_id, "enabled": True}
         )

backend/tests/test_credentials.py

@@ -1,16 +1,20 @@
 import asyncio
 
 import httpx
+import pytest
 
 from app.config import get_settings
 from app.contracts import CredentialWriteRequest
+from app.errors import ApiError
 from app.providers.credentials import (
     ChainedCredentialResolver,
+    CredentialStoreError,
     EncryptedCredentialStore,
     EnvironmentCredentialResolver,
 )
+from app.providers.factory import ProviderFactory
 from app.providers.openai_compatible import OpenAICompatibleProvider
-from app.routes import get_credential_status, put_credential
+from app.routes import delete_credential, get_credential_status, put_credential
 
 
 def test_encrypted_credential_store_round_trip_without_plaintext_on_disk() -> None:
@@ -72,3 +76,29 @@ def test_saved_credential_takes_precedence_over_environment_fallback(monkeypatch
     resolver = ChainedCredentialResolver(store, EnvironmentCredentialResolver())
 
     assert resolver.resolve("deepseek") == "saved-key"
+
+
+def test_public_credential_api_rejects_plugin_namespace() -> None:
+    operations = [
+        get_credential_status("plugin.text-tools.api_key"),
+        put_credential(
+            "plugin.text-tools.api_key",
+            CredentialWriteRequest(api_key="must-not-write"),
+        ),
+        delete_credential("plugin.text-tools.api_key"),
+    ]
+    for operation in operations:
+        with pytest.raises(ApiError) as exc:
+            asyncio.run(operation)
+        assert exc.value.code == "CREDENTIAL_NAMESPACE_RESERVED"
+
+    assert EncryptedCredentialStore().resolve("plugin.text-tools.api_key") is None
+
+
+def test_provider_resolver_cannot_read_plugin_secret() -> None:
+    store = EncryptedCredentialStore()
+    store.put("plugin.text-tools.api_key", "private-plugin-secret")
+    resolver = ProviderFactory(store).credentials
+
+    with pytest.raises(CredentialStoreError, match="reserved for Plugin settings"):
+        resolver.resolve("plugin.text-tools.api_key")

backend/tests/test_plugin_contributions.py

@@ -106,7 +106,9 @@ def test_command_only_receives_declared_context() -> None:
         def __init__(self) -> None:
             self.context = None
 
-        async def execute_command(self, handler, arguments, context, settings):
+        async def execute_command(
+            self, handler, arguments, context, settings, resolve_secret
+        ):
             self.context = context
             return PluginCommandEffect(type="none")
 
@@ -128,6 +130,81 @@ def test_command_only_receives_declared_context() -> None:
     assert host.context == {"selection": "visible"}
 
 
+def test_command_resolves_only_declared_plugin_secrets(tmp_path: Path) -> None:
+    class SecretHost(DeclarativePluginHost):
+        def __init__(self) -> None:
+            self.secret = None
+            self.denied_code = None
+
+        async def execute_command(
+            self, handler, arguments, context, settings, resolve_secret
+        ):
+            self.secret = resolve_secret("api_key")
+            try:
+                resolve_secret("undeclared")
+            except ExtensionError as exc:
+                self.denied_code = exc.code
+            return PluginCommandEffect(type="none")
+
+    host = SecretHost()
+    runtime = PluginRuntime(ToolRegistry(), host=host)
+    package = tmp_path / "secret-command"
+    package.mkdir()
+    (package / "plugin.yaml").write_text(
+        """
+id: secret-command
+name: Secret Command
+version: 1.0.0
+permissions: [secrets.use]
+contributes:
+  commands: [secret-command.run]
+  settings_sections: [secret-command.general]
+backend:
+  type: internal_rpc
+  transport: none
+""".strip(),
+        encoding="utf-8",
+    )
+    (package / "commands.yaml").write_text(
+        """
+commands:
+  - command_id: secret-command.run
+    title: Secret Command
+    locations: [command_palette]
+    secrets: [api_key]
+    handler: echo
+""".strip(),
+        encoding="utf-8",
+    )
+    (package / "settings.yaml").write_text(
+        """
+section_id: secret-command.general
+schema_version: 1
+fields:
+  - key: api_key
+    label: API Key
+    type: secret
+""".strip(),
+        encoding="utf-8",
+    )
+    runtime.install(package)
+    runtime.set_permissions("secret-command", ["secrets.use"])
+    runtime.enable("secret-command")
+    runtime.put_setting_secret("secret-command", "api_key", "runtime-only-secret")
+
+    run(
+        runtime.execute_command(
+            "secret-command.run",
+            {},
+            PluginCommandContext(selection="visible"),
+        )
+    )
+
+    assert host.secret == "runtime-only-secret"
+    assert host.denied_code == "PLUGIN_SECRET_ACCESS_DENIED"
+    assert "runtime-only-secret" not in repr(runtime.commands.audit_events())
+
+
 def test_settings_schema_contains_defaults_and_hides_secret() -> None:
     container = build_container()
 
@@ -262,6 +339,30 @@ fields:
     assert settings_error.value.code == "PLUGIN_SETTINGS_SCHEMA_INVALID"
 
 
+def test_null_command_list_returns_stable_manifest_error(tmp_path: Path) -> None:
+    package = tmp_path / "null-commands"
+    package.mkdir()
+    (package / "plugin.yaml").write_text(
+        """
+id: null-commands
+name: Null Commands
+version: 1.0.0
+contributes:
+  commands: []
+backend:
+  type: internal_rpc
+  transport: none
+""".strip(),
+        encoding="utf-8",
+    )
+    (package / "commands.yaml").write_text("commands:\n", encoding="utf-8")
+
+    with pytest.raises(ExtensionError) as exc:
+        PluginRuntime(ToolRegistry()).install(package)
+
+    assert exc.value.code == "EXTENSION_MANIFEST_INVALID"
+
+
 def test_settings_missing_and_secret_field_errors_are_stable() -> None:
     container = build_container()