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package cabf_br
/*
* 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.
*/
import (
"strings"
"github.com/zmap/zcrypto/x509"
"github.com/zmap/zlint/v3/lint"
"github.com/zmap/zlint/v3/util"
)
type DNSNameLabelLengthTooLong struct{}
func init() {
lint.RegisterCertificateLint(&lint.CertificateLint{
LintMetadata: lint.LintMetadata{
Name: "e_dnsname_label_too_long",
Description: "DNSName labels MUST be less than or equal to 63 characters",
Citation: "RFC 1035",
Source: lint.CABFBaselineRequirements,
EffectiveDate: util.CABEffectiveDate,
},
Lint: NewDNSNameLabelLengthTooLong,
})
}
func NewDNSNameLabelLengthTooLong() lint.LintInterface {
return &DNSNameLabelLengthTooLong{}
}
func (l *DNSNameLabelLengthTooLong) CheckApplies(c *x509.Certificate) bool {
return util.IsSubscriberCert(c) && util.DNSNamesExist(c)
}
func labelLengthTooLong(domain string) bool {
labels := strings.Split(domain, ".")
for _, label := range labels {
if len(label) > 63 {
return true
}
}
return false
}
func (l *DNSNameLabelLengthTooLong) Execute(c *x509.Certificate) *lint.LintResult {
if c.Subject.CommonName != "" && !util.CommonNameIsIP(c) {
labelTooLong := labelLengthTooLong(c.Subject.CommonName)
if labelTooLong {
return &lint.LintResult{Status: lint.Error}
}
}
for _, dns := range c.DNSNames {
labelTooLong := labelLengthTooLong(dns)
if labelTooLong {
return &lint.LintResult{Status: lint.Error}
}
}
return &lint.LintResult{Status: lint.Pass}
}
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