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/*
* ZLint Copyright 2024 Regents of the University of Michigan
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package cabf_ev
import (
"fmt"
"github.com/zmap/zcrypto/x509"
"github.com/zmap/zlint/v3/lint"
"github.com/zmap/zlint/v3/util"
)
const (
// Ballot 144 specified:
// CAs MUST NOT issue a Certificate that includes a Domain Name where .onion
// is in the right-most label of the Domain Name with a validity period longer
// than 15 months
maxOnionValidityMonths = 15
)
type torValidityTooLarge struct{}
func init() {
lint.RegisterCertificateLint(&lint.CertificateLint{
LintMetadata: lint.LintMetadata{
Name: "e_onion_subject_validity_time_too_large",
Description: fmt.Sprintf(
"certificates with .onion names can not be valid for more than %d months",
maxOnionValidityMonths),
Citation: "EVGs: Appendix F",
Source: lint.CABFEVGuidelines,
EffectiveDate: util.OnionOnlyEVDate,
},
Lint: NewTorValidityTooLarge,
})
}
func NewTorValidityTooLarge() lint.LintInterface {
return &torValidityTooLarge{}
}
// Initialize for a torValidityTooLarge linter is a NOP.
// CheckApplies returns true if the certificate is a subscriber certificate that
// contains a subject name ending in `.onion`.
func (l *torValidityTooLarge) CheckApplies(c *x509.Certificate) bool {
return util.IsSubscriberCert(c) && util.CertificateSubjInTLD(c, util.OnionTLD)
}
// Execute will return an lint.Error lint.LintResult if the provided certificate has
// a validity period longer than the maximum allowed validity for a certificate
// with a .onion subject.
func (l *torValidityTooLarge) Execute(c *x509.Certificate) *lint.LintResult {
if c.NotBefore.AddDate(0, maxOnionValidityMonths, 0).Before(c.NotAfter) {
return &lint.LintResult{
Status: lint.Error,
}
}
return &lint.LintResult{Status: lint.Pass}
}
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