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package community
/*
* 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 (
"fmt"
"strings"
"github.com/zmap/zcrypto/x509"
"github.com/zmap/zlint/v3/lint"
"github.com/zmap/zlint/v3/util"
)
type pubSuffix struct{}
func init() {
lint.RegisterCertificateLint(&lint.CertificateLint{
LintMetadata: lint.LintMetadata{
Name: "n_san_iana_pub_suffix_empty",
Description: "The domain SHOULD NOT have a bare public suffix",
Citation: "awslabs certlint",
Source: lint.Community,
EffectiveDate: util.ZeroDate,
},
Lint: NewPubSuffix,
})
}
func NewPubSuffix() lint.LintInterface {
return &pubSuffix{}
}
func (l *pubSuffix) CheckApplies(c *x509.Certificate) bool {
return util.IsExtInCert(c, util.SubjectAlternateNameOID)
}
func (l *pubSuffix) Execute(c *x509.Certificate) *lint.LintResult {
var badNames []string
for _, parsedName := range c.GetParsedDNSNames(false) {
if parseErr := parsedName.ParseError; parseErr == nil {
continue
} else if strings.HasSuffix(parseErr.Error(), "is a suffix") {
badNames = append(badNames, parsedName.DomainString)
}
}
if badNamesCount := len(badNames); badNamesCount > 0 {
return &lint.LintResult{
Status: lint.Notice,
Details: fmt.Sprintf(
"%d DNS name(s) are bare public suffixes: %s",
badNamesCount, strings.Join(badNames, ", ")),
}
}
return &lint.LintResult{Status: lint.Pass}
}
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