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Signed-off-by: oflatt <[email protected]> Signed-off-by: Shaobo He <[email protected]> Co-authored-by: oflatt <[email protected]>
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cedar-drt/fuzz/fuzz_targets/entity-slicing-drt-type-directed.rs
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| /* | ||
| * Copyright Cedar Contributors | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| #![no_main] | ||
| use cedar_drt::initialize_log; | ||
| use cedar_drt_inner::*; | ||
| use cedar_policy_core::ast; | ||
| use cedar_policy_core::authorizer::Authorizer; | ||
| use cedar_policy_core::entities::Entities; | ||
| use cedar_policy_generators::{ | ||
| abac::{ABACPolicy, ABACRequest}, | ||
| hierarchy::{Hierarchy, HierarchyGenerator}, | ||
| schema::Schema, | ||
| settings::ABACSettings, | ||
| }; | ||
| use cedar_policy_validator::entity_manifest::compute_entity_manifest; | ||
| use cedar_policy_validator::{ValidationMode, Validator, ValidatorSchema}; | ||
| use libfuzzer_sys::arbitrary::{self, Arbitrary, Unstructured}; | ||
| use log::debug; | ||
| use serde::Serialize; | ||
| use std::convert::TryFrom; | ||
|
|
||
| /// Input expected by this fuzz target: | ||
| /// An ABAC hierarchy, schema, and 8 associated policies | ||
| #[derive(Debug, Clone, Serialize)] | ||
| struct FuzzTargetInput { | ||
| /// generated schema | ||
| #[serde(skip)] | ||
| pub schema: Schema, | ||
| /// generated hierarchy | ||
| #[serde(skip)] | ||
| pub hierarchy: Hierarchy, | ||
| /// the policy which we will see if it validates | ||
| pub policy: ABACPolicy, | ||
| /// the requests to try, if the policy validates. | ||
| /// We try 8 requests per validated policy. | ||
| #[serde(skip)] | ||
| pub requests: [ABACRequest; 8], | ||
| } | ||
|
|
||
| /// settings for this fuzz target | ||
| const SETTINGS: ABACSettings = ABACSettings { | ||
| match_types: true, | ||
| enable_extensions: true, | ||
| max_depth: 7, | ||
| max_width: 7, | ||
| enable_additional_attributes: true, | ||
| enable_like: true, | ||
| enable_action_groups_and_attrs: true, | ||
| enable_arbitrary_func_call: true, | ||
| enable_unknowns: false, | ||
| enable_action_in_constraints: true, | ||
| enable_unspecified_apply_spec: true, | ||
| }; | ||
|
|
||
| impl<'a> Arbitrary<'a> for FuzzTargetInput { | ||
| fn arbitrary(u: &mut Unstructured<'a>) -> arbitrary::Result<Self> { | ||
| let schema: Schema = Schema::arbitrary(SETTINGS.clone(), u)?; | ||
| let hierarchy = schema.arbitrary_hierarchy(u)?; | ||
| let policy = schema.arbitrary_policy(&hierarchy, u)?; | ||
| let requests = [ | ||
| schema.arbitrary_request(&hierarchy, u)?, | ||
| schema.arbitrary_request(&hierarchy, u)?, | ||
| schema.arbitrary_request(&hierarchy, u)?, | ||
| schema.arbitrary_request(&hierarchy, u)?, | ||
| schema.arbitrary_request(&hierarchy, u)?, | ||
| schema.arbitrary_request(&hierarchy, u)?, | ||
| schema.arbitrary_request(&hierarchy, u)?, | ||
| schema.arbitrary_request(&hierarchy, u)?, | ||
| ]; | ||
| Ok(Self { | ||
| schema, | ||
| hierarchy, | ||
| policy, | ||
| requests, | ||
| }) | ||
| } | ||
|
|
||
| fn try_size_hint( | ||
| depth: usize, | ||
| ) -> arbitrary::Result<(usize, Option<usize>), arbitrary::MaxRecursionReached> { | ||
| Ok(arbitrary::size_hint::and_all(&[ | ||
| Schema::arbitrary_size_hint(depth)?, | ||
| HierarchyGenerator::size_hint(depth), | ||
| Schema::arbitrary_policy_size_hint(&SETTINGS, depth), | ||
| Schema::arbitrary_request_size_hint(depth), | ||
| Schema::arbitrary_request_size_hint(depth), | ||
| Schema::arbitrary_request_size_hint(depth), | ||
| Schema::arbitrary_request_size_hint(depth), | ||
| Schema::arbitrary_request_size_hint(depth), | ||
| Schema::arbitrary_request_size_hint(depth), | ||
| Schema::arbitrary_request_size_hint(depth), | ||
| Schema::arbitrary_request_size_hint(depth), | ||
| ])) | ||
| } | ||
| } | ||
|
|
||
| /// helper function that just tells us whether a policyset passes validation | ||
| fn passes_validation(validator: &Validator, policyset: &ast::PolicySet) -> bool { | ||
| validator | ||
| .validate(policyset, ValidationMode::default()) | ||
| .validation_passed() | ||
| } | ||
|
|
||
| // The main fuzz target. This is for PBT on the validator | ||
| fuzz_target!(|input: FuzzTargetInput| { | ||
| initialize_log(); | ||
| if let Ok(schema) = ValidatorSchema::try_from(input.schema) { | ||
| debug!("Schema: {:?}", schema); | ||
| if let Ok(entities) = Entities::try_from(input.hierarchy.clone()) { | ||
| let validator = Validator::new(schema.clone()); | ||
| let mut policyset = ast::PolicySet::new(); | ||
| let policy: ast::StaticPolicy = input.policy.into(); | ||
| policyset.add_static(policy.clone()).unwrap(); | ||
| if passes_validation(&validator, &policyset) { | ||
| // policy successfully validated, do entity slicing | ||
| let manifest = compute_entity_manifest(&schema, &policyset) | ||
| .expect("failed to produce entity manifest"); | ||
|
|
||
| let authorizer = Authorizer::new(); | ||
| debug!("Policies: {policyset}"); | ||
| debug!("Entities: {entities}"); | ||
| for abac_request in input.requests.into_iter() { | ||
| let request = ast::Request::from(abac_request); | ||
| debug!("Request: {request}"); | ||
| let entity_slice = manifest | ||
| .slice_entities(&entities, &request) | ||
| .expect("failed to slice entities"); | ||
| debug!("Entity slice: {entity_slice}"); | ||
| let ans_original = | ||
| authorizer.is_authorized(request.clone(), &policyset, &entities); | ||
| let ans_slice = authorizer.is_authorized(request, &policyset, &entity_slice); | ||
| assert_eq!( | ||
| ans_original.decision, ans_slice.decision, | ||
| "Authorization decision differed with and without entity slicing!" | ||
| ); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| }); |