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Project-declaredLean 4.31.0 · null

Verify Matches Disjoint is ok and complete

Cedar.Thm.verifyMatchesDisjoint_is_ok_and_complete

Plain-language statement

Concrete version of verifyMatchesDisjoint_is_complete.

Exact Lean statement

theorem verifyMatchesDisjoint_is_ok_and_complete {p₁ p₁' p₂ p₂' : Policy} {Γ : TypeEnv} :
  Γ.WellFormed →
  wellTypedPolicy p₁ Γ = .ok p₁' →
  wellTypedPolicy p₂ Γ = .ok p₂' →
  ∃ asserts,
    verifyMatchesDisjoint p₁' p₂' (SymEnv.ofEnv Γ) = .ok asserts ∧
    (SymEnv.ofEnv Γ ⊧ asserts →
      ∃ env : Env,
        InstanceOfWellFormedEnvironment env.request env.entities Γ ∧
        env.StronglyWellFormedForPolicy p₁' ∧
        env.StronglyWellFormedForPolicy p₂' ∧
        evaluate p₁.toExpr env.request env.entities = .ok (.prim (.bool true)) ∧
        evaluate p₂.toExpr env.request env.entities = .ok (.prim (.bool true)))

Formal artifact

Lean source

Canonical source
Full Lean sourceLean 4
theorem verifyMatchesDisjoint_is_ok_and_complete {p₁ p₁' p₂ p₂' : Policy} {Γ : TypeEnv} :  Γ.WellFormed   wellTypedPolicy p₁ Γ = .ok p₁'   wellTypedPolicy p₂ Γ = .ok p₂'    asserts,    verifyMatchesDisjoint p₁' p₂' (SymEnv.ofEnv Γ) = .ok asserts     (SymEnv.ofEnv Γ ⊧ asserts        env : Env,        InstanceOfWellFormedEnvironment env.request env.entities Γ         env.StronglyWellFormedForPolicy p₁'         env.StronglyWellFormedForPolicy p₂'         evaluate p₁.toExpr env.request env.entities = .ok (.prim (.bool true))         evaluate p₂.toExpr env.request env.entities = .ok (.prim (.bool true))):= by  intros hwf hwt₁ hwt₂  have hwf_εnv₁ := ofEnv_swf_for_policy hwf hwt₁  have hwf_εnv₂ := ofEnv_swf_for_policy hwf hwt₂  have asserts, hok := verifyMatchesDisjoint_is_ok hwf hwt₁ hwt₂  exists asserts  simp only [hok, true_and]  intros hsat  have env, hmodel, hswf_env₁, hswf_env₂, henum_comp, hres := verifyMatchesDisjoint_is_complete hwf_εnv₁ hwf_εnv₂ hok hsat  have hinst := ofEnv_completeness hwf hswf_env₁.1 henum_comp hmodel  simp only [    wellTypedPolicy_preserves_evaluation hinst hwt₁,    wellTypedPolicy_preserves_evaluation hinst hwt₂,  ] at hres  exists env
Project
Cedar Specification
License
Apache-2.0
Commit
3f093947b8ae
Source
cedar-lean/Cedar/Thm/WellTypedVerification.lean:341-368

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