pauldron-policy
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Simple JSON-based Authorization Policy Engine
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<a href="index.html">All files</a> SimplePolicyDecisionCombinerEngine.js
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function combineDecisionsDenyOverrides (decisions) {
const AuthzDecisionsPriorities = {
"Deny": 3,
"Indeterminate": 2,
"Permit": 1,
"NotApplicable": 0
};
const finalAuthorizationDecision = decisions
.map((decision) => decision.authorization)
.reduce((sofar, thisDecision) => (
(AuthzDecisionsPriorities[sofar] >= AuthzDecisionsPriorities[thisDecision]) ? sofar : thisDecision
), "NotApplicable");
const finalObligations = decisions
.map((decision) => decision.obligations)
.reduce((sofar, thisObligation) => (
{ ...sofar , ...thisObligation}
), {});
return {
authorization: finalAuthorizationDecision,
obligations: (finalAuthorizationDecision === "Indeterminate" || finalAuthorizationDecision === "Permit")
? finalObligations
: {}
};
}
// deny-override
function evaluate(request, policies, engines) {
const decisions = policies.map((policy) => (
engines[policy.type].evaluate(request, policy)
));
return combineDecisionsDenyOverrides(decisions);
}
module.exports = {
evaluate,
combineDecisionsDenyOverrides
};
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