github.com/zmap/zlint@v1.1.0/lints/lint_subject_dn_serial_number_max_length.go (about)

     1  package lints
     2  
     3  /*
     4   * ZLint Copyright 2018 Regents of the University of Michigan
     5   *
     6   * Licensed under the Apache License, Version 2.0 (the "License"); you may not
     7   * use this file except in compliance with the License. You may obtain a copy
     8   * of the License at http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
    13   * implied. See the License for the specific language governing
    14   * permissions and limitations under the License.
    15   */
    16  
    17  import (
    18  	"unicode/utf8"
    19  
    20  	"github.com/zmap/zcrypto/x509"
    21  	"github.com/zmap/zlint/util"
    22  )
    23  
    24  type SubjectDNSerialNumberMaxLength struct{}
    25  
    26  func (l *SubjectDNSerialNumberMaxLength) Initialize() error {
    27  	return nil
    28  }
    29  
    30  func (l *SubjectDNSerialNumberMaxLength) CheckApplies(c *x509.Certificate) bool {
    31  	return len(c.Subject.SerialNumber) > 0
    32  }
    33  
    34  func (l *SubjectDNSerialNumberMaxLength) Execute(c *x509.Certificate) *LintResult {
    35  	if utf8.RuneCountInString(c.Subject.SerialNumber) > 64 {
    36  		return &LintResult{Status: Error}
    37  	}
    38  	return &LintResult{Status: Pass}
    39  }
    40  
    41  func init() {
    42  	RegisterLint(&Lint{
    43  		Name:          "e_subject_dn_serial_number_max_length",
    44  		Description:   "The 'Serial Number' field of the subject MUST be less than 64 characters",
    45  		Citation:      "RFC 5280: Appendix A",
    46  		Source:        RFC5280,
    47  		EffectiveDate: util.ZeroDate,
    48  		Lint:          &SubjectDNSerialNumberMaxLength{},
    49  	})
    50  }