Plain-language statement
Let ps be Cedar policies, env a concrete evaluation environment (request and entities), εnv a symbolic environment, and t the term resulting from symbolically authorizing ps with respect to εnv, i.e., SymCC.isAuthorized ps εnv = .ok t. Let ps and env be a well-formed input to the concrete authorizer, i.e., env.WellFormedForPolicies ps....
Exact Lean statement
theorem isAuthorized_is_sound {ps : Policies} {env : Env} {εnv : SymEnv} {t : Term.Outcome εnv} :
εnv.WellFormedForPolicies ps →
env.WellFormedForPolicies ps →
env ∈ᵢ εnv →
SymCC.isAuthorized ps εnv = .ok t →
∃ (decision : Spec.Decision),
decision ∈ₒ t ∧
Spec.isAuthorized env.request env.entities ps ∼ decisionFormal artifact
Lean source
theorem isAuthorized_is_sound {ps : Policies} {env : Env} {εnv : SymEnv} {t : Term.Outcome εnv} : εnv.WellFormedForPolicies ps → env.WellFormedForPolicies ps → env ∈ᵢ εnv → SymCC.isAuthorized ps εnv = .ok t → ∃ (decision : Spec.Decision), decision ∈ₒ t ∧ Spec.isAuthorized env.request env.entities ps ∼ decision:= by intro hεnv henv hinᵢ hok replace ⟨I, hI, hinᵢ⟩ := hinᵢ have heq := isAuthorized_bisimulation hεnv henv hI hinᵢ hok exists (Spec.isAuthorized env.request env.entities ps).decision simp only [same_responses_self_decision, and_true] exists I- Project
- Cedar Specification
- License
- Apache-2.0
- Commit
- 3f093947b8ae
- Source
- cedar-lean/Cedar/Thm/SymbolicCompilation.lean:155-169
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Related declarations
Find? ext
Cedar.Data.Map.find?_ext
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Source project: Cedar Specification
Person-level attribution pending.
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Cedar.Data.Map.find?_notmem_keys
Plain-language statement
Inverse of find?_mem_toList, except that this requires wf
Source project: Cedar Specification
Person-level attribution pending.
Find? some iff in values
Cedar.Data.Map.find?_some_iff_in_values
Plain-language statement
The mp direction of this does not need the wf precondition and, in fact, is available separately as find?_some_implies_in_values above
Source project: Cedar Specification
Person-level attribution pending.