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package rfc
/*
* 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 (
"unicode/utf8"
"github.com/zmap/zcrypto/x509"
"github.com/zmap/zlint/v3/lint"
"github.com/zmap/zlint/v3/util"
)
type subjectSurnameMaxLength struct{}
/************************************************
RFC 5280: A.1
-- Naming attributes of type X520name
id-at-surname AttributeType ::= { id-at 4 }
-- Naming attributes of type X520Name:
-- X520name ::= DirectoryString (SIZE (1..ub-name))
--
-- Expanded to avoid parameterized type:
X520name ::= CHOICE {
teletexString TeletexString (SIZE (1..ub-name)),
printableString PrintableString (SIZE (1..ub-name)),
universalString UniversalString (SIZE (1..ub-name)),
utf8String UTF8String (SIZE (1..ub-name)),
bmpString BMPString (SIZE (1..ub-name)) }
-- specifications of Upper Bounds MUST be regarded as mandatory
-- from Annex B of ITU-T X.411 Reference Definition of MTS Parameter
-- Upper Bounds
-- Upper Bounds
ub-name INTEGER ::= 32768
************************************************/
func init() {
lint.RegisterCertificateLint(&lint.CertificateLint{
LintMetadata: lint.LintMetadata{
Name: "e_subject_surname_max_length",
Description: "The 'Surname' field of the subject MUST be less than 32769 characters",
Citation: "RFC 5280: A.1",
Source: lint.RFC5280,
EffectiveDate: util.RFC2459Date,
},
Lint: NewSubjectSurnameMaxLength,
})
}
func NewSubjectSurnameMaxLength() lint.LintInterface {
return &subjectSurnameMaxLength{}
}
func (l *subjectSurnameMaxLength) CheckApplies(c *x509.Certificate) bool {
return len(c.Subject.Surname) > 0
}
func (l *subjectSurnameMaxLength) Execute(c *x509.Certificate) *lint.LintResult {
for _, surname := range c.Subject.Surname {
characters := utf8.RuneCountInString(surname)
if characters > 32768 {
return &lint.LintResult{Status: lint.Error}
}
}
return &lint.LintResult{Status: lint.Pass}
}
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