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//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftCertificates open source project
//
// Copyright (c) 2023 Apple Inc. and the SwiftCertificates project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.txt for the list of SwiftCertificates project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
import Foundation
import SwiftASN1
/// A sub-policy of the ``RFC5280Policy`` that polices expiry.
@usableFromInline
struct ExpiryPolicy: VerifierPolicy {
@usableFromInline
let verifyingCriticalExtensions: [ASN1ObjectIdentifier] = []
@usableFromInline
let validationTime: GeneralizedTime
@inlinable
init(validationTime: Date) {
self.validationTime = GeneralizedTime(validationTime)
}
@inlinable
func chainMeetsPolicyRequirements(chain: UnverifiedCertificateChain) -> PolicyEvaluationResult {
// This is an easy check: confirm all the certs are valid.
//
// Note that we do this computation on the TBSCertificate Validity struct, not the public Date fields. This is
// to avoid expensive repeated transformations into Date fields.
for cert in chain {
let notValidBefore = GeneralizedTime(cert.tbsCertificate.validity.notBefore)
let notValidAfter = GeneralizedTime(cert.tbsCertificate.validity.notAfter)
if notValidBefore > notValidAfter {
return .failsToMeetPolicy(
reason:
"RFC5280Policy: Certificate \(cert) has invalid expiry, notValidAfter is earlier than notValidBefore"
)
}
if self.validationTime < notValidBefore {
return .failsToMeetPolicy(reason: "RFC5280Policy: Certificate \(cert) is not yet valid")
}
if self.validationTime > notValidAfter {
return .failsToMeetPolicy(reason: "RFC5280Policy: Certificate \(cert) has expired")
}
}
return .meetsPolicy
}
}
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