github.com/zmap/zlint@v1.1.0/lints/lint_subject_surname_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-surname-length INTEGER ::= 40
    22  
    23  ************************************************/
    24  
    25  import (
    26  	"unicode/utf8"
    27  
    28  	"github.com/zmap/zcrypto/x509"
    29  	"github.com/zmap/zlint/util"
    30  )
    31  
    32  type subjectSurnameMaxLength struct{}
    33  
    34  func (l *subjectSurnameMaxLength) Initialize() error {
    35  	return nil
    36  }
    37  
    38  func (l *subjectSurnameMaxLength) CheckApplies(c *x509.Certificate) bool {
    39  	return true
    40  }
    41  
    42  func (l *subjectSurnameMaxLength) Execute(c *x509.Certificate) *LintResult {
    43  	for _, j := range c.Subject.Surname {
    44  		if utf8.RuneCountInString(j) > 40 {
    45  			return &LintResult{Status: Error}
    46  		}
    47  	}
    48  
    49  	return &LintResult{Status: Pass}
    50  }
    51  
    52  func init() {
    53  	RegisterLint(&Lint{
    54  		Name:          "e_subject_surname_max_length",
    55  		Description:   "The 'Surname' field of the subject MUST be less than 41 characters",
    56  		Citation:      "RFC 5280: A.1",
    57  		Source:        RFC5280,
    58  		EffectiveDate: util.RFC2459Date,
    59  		Lint:          &subjectSurnameMaxLength{},
    60  	})
    61  }