github.com/zmap/zlint@v1.1.0/lints/lint_subject_common_name_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  /************************************************
    18  RFC 5280: A.1
    19  	* In this Appendix, there is a list of upperbounds
    20  	for fields in a x509 Certificate. *
    21  	ub-common-name INTEGER ::= 64
    22  ************************************************/
    23  
    24  import (
    25  	"unicode/utf8"
    26  
    27  	"github.com/zmap/zcrypto/x509"
    28  	"github.com/zmap/zlint/util"
    29  )
    30  
    31  type subjectCommonNameMaxLength struct{}
    32  
    33  func (l *subjectCommonNameMaxLength) Initialize() error {
    34  	return nil
    35  }
    36  
    37  func (l *subjectCommonNameMaxLength) CheckApplies(c *x509.Certificate) bool {
    38  	return true
    39  }
    40  
    41  func (l *subjectCommonNameMaxLength) Execute(c *x509.Certificate) *LintResult {
    42  	if utf8.RuneCountInString(c.Subject.CommonName) > 64 {
    43  		return &LintResult{Status: Error}
    44  	} else {
    45  		return &LintResult{Status: Pass}
    46  	}
    47  }
    48  
    49  func init() {
    50  	RegisterLint(&Lint{
    51  		Name:          "e_subject_common_name_max_length",
    52  		Description:   "The commonName field of the subject MUST be less than 64 characters",
    53  		Citation:      "RFC 5280: A.1",
    54  		Source:        RFC5280,
    55  		EffectiveDate: util.RFC2459Date,
    56  		Lint:          &subjectCommonNameMaxLength{},
    57  	})
    58  }