Unchanged deny when add forbid
Cedar.Thm.unchanged_deny_when_add_forbid
Plain-language statement
Adding a forbid policy won't change a Deny decision.
Exact Lean statement
theorem unchanged_deny_when_add_forbid (request : Request) (entities: Entities) (policies: Policies) (policy₂: Policy) : policy₂.effect = .forbid → (isAuthorized request entities policies).decision = .deny → (isAuthorized request entities (policy₂ :: policies)).decision = .deny
Formal artifact
Lean source
theorem unchanged_deny_when_add_forbid (request : Request) (entities: Entities) (policies: Policies) (policy₂: Policy) : policy₂.effect = .forbid → (isAuthorized request entities policies).decision = .deny → (isAuthorized request entities (policy₂ :: policies)).decision = .deny := by intro h₁ h₂ rw [← denied_iff_explicitly_denied_or_not_permitted] at * unfold IsExplicitlyPermitted IsExplicitlyForbidden HasSatisfiedEffect at * simp only [not_exists, not_and, Bool.not_eq_true] at h₂ simp only [List.mem_cons, exists_eq_or_imp, h₁, true_and, reduceCtorEq, false_and, false_or, not_exists, not_and, Bool.not_eq_true] exact h₂.elim (fun hb => Or.inl (Or.inr hb)) Or.inr- Project
- Cedar Specification
- License
- Apache-2.0
- Commit
- 3f093947b8ae
- Source
- cedar-lean/Cedar/Thm/Authorization.lean:179-189
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Person-level attribution pending.
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Person-level attribution pending.