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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 (
"regexp"
"github.com/zmap/zcrypto/x509"
"github.com/zmap/zlint/v3/lint"
"github.com/zmap/zlint/v3/util"
)
type DNSNameProperCharacters struct {
CompiledExpression *regexp.Regexp
}
func init() {
lint.RegisterCertificateLint(&lint.CertificateLint{
LintMetadata: lint.LintMetadata{
Name: "e_dnsname_bad_character_in_label",
Description: "Characters in labels of DNSNames MUST be alphanumeric, - , _ or *",
Citation: "BRs: 7.1.4.2",
Source: lint.CABFBaselineRequirements,
EffectiveDate: util.CABEffectiveDate,
},
Lint: NewDNSNameProperCharacters,
})
}
func NewDNSNameProperCharacters() lint.LintInterface {
return &DNSNameProperCharacters{
CompiledExpression: regexp.MustCompile(`^(\*\.)?(\?\.)*([A-Za-z0-9*_-]+\.)*[A-Za-z0-9*_-]*$`),
}
}
func (l *DNSNameProperCharacters) CheckApplies(c *x509.Certificate) bool {
return util.IsSubscriberCert(c) && util.DNSNamesExist(c)
}
func (l *DNSNameProperCharacters) Execute(c *x509.Certificate) *lint.LintResult {
if c.Subject.CommonName != "" && !util.CommonNameIsIP(c) {
if !l.CompiledExpression.MatchString(c.Subject.CommonName) {
return &lint.LintResult{Status: lint.Error}
}
}
for _, dns := range c.DNSNames {
if !l.CompiledExpression.MatchString(dns) {
return &lint.LintResult{Status: lint.Error}
}
}
return &lint.LintResult{Status: lint.Pass}
}
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