mirror of
https://github.com/meta-llama/llama-stack.git
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96cd51a0c8
* change from access_attributes to owner on dynamically created resources * define simpler string based conditions for more intuitive restriction
129 lines
3.9 KiB
Python
129 lines
3.9 KiB
Python
# Copyright (c) Meta Platforms, Inc. and affiliates.
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# All rights reserved.
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#
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# This source code is licensed under the terms described in the LICENSE file in
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# the root directory of this source tree.
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from typing import Protocol
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class User(Protocol):
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principal: str
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attributes: dict[str, list[str]] | None
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class ProtectedResource(Protocol):
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type: str
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identifier: str
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owner: User
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class Condition(Protocol):
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def matches(self, resource: ProtectedResource, user: User) -> bool: ...
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class UserInOwnersList:
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def __init__(self, name: str):
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self.name = name
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def owners_values(self, resource: ProtectedResource) -> list[str] | None:
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if (
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hasattr(resource, "owner")
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and resource.owner
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and resource.owner.attributes
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and self.name in resource.owner.attributes
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):
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return resource.owner.attributes[self.name]
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else:
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return None
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def matches(self, resource: ProtectedResource, user: User) -> bool:
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required = self.owners_values(resource)
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if not required:
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return True
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if not user.attributes or self.name not in user.attributes or not user.attributes[self.name]:
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return False
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user_values = user.attributes[self.name]
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for value in required:
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if value in user_values:
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return True
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return False
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def __repr__(self):
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return f"user in owners {self.name}"
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class UserNotInOwnersList(UserInOwnersList):
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def __init__(self, name: str):
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super().__init__(name)
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def matches(self, resource: ProtectedResource, user: User) -> bool:
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return not super().matches(resource, user)
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def __repr__(self):
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return f"user not in owners {self.name}"
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class UserWithValueInList:
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def __init__(self, name: str, value: str):
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self.name = name
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self.value = value
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def matches(self, resource: ProtectedResource, user: User) -> bool:
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if user.attributes and self.name in user.attributes:
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return self.value in user.attributes[self.name]
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print(f"User does not have {self.value} in {self.name}")
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return False
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def __repr__(self):
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return f"user with {self.value} in {self.name}"
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class UserWithValueNotInList(UserWithValueInList):
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def __init__(self, name: str, value: str):
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super().__init__(name, value)
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def matches(self, resource: ProtectedResource, user: User) -> bool:
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return not super().matches(resource, user)
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def __repr__(self):
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return f"user with {self.value} not in {self.name}"
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class UserIsOwner:
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def matches(self, resource: ProtectedResource, user: User) -> bool:
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return resource.owner.principal == user.principal if resource.owner else False
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def __repr__(self):
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return "user is owner"
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class UserIsNotOwner:
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def matches(self, resource: ProtectedResource, user: User) -> bool:
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return not resource.owner or resource.owner.principal != user.principal
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def __repr__(self):
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return "user is not owner"
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def parse_condition(condition: str) -> Condition:
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words = condition.split()
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match words:
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case ["user", "is", "owner"]:
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return UserIsOwner()
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case ["user", "is", "not", "owner"]:
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return UserIsNotOwner()
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case ["user", "with", value, "in", name]:
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return UserWithValueInList(name, value)
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case ["user", "with", value, "not", "in", name]:
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return UserWithValueNotInList(name, value)
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case ["user", "in", "owners", name]:
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return UserInOwnersList(name)
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case ["user", "not", "in", "owners", name]:
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return UserNotInOwnersList(name)
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case _:
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raise ValueError(f"Invalid condition: {condition}")
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def parse_conditions(conditions: list[str]) -> list[Condition]:
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return [parse_condition(c) for c in conditions]
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