github.com/zmap/zlint@v1.1.0/lints/lint_subject_email_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-emailaddress-length INTEGER ::= 128
    22  
    23  The ASN.1 modules in Appendix A are unchanged from RFC 3280, except
    24  that ub-emailaddress-length was changed from 128 to 255 in order to
    25  align with PKCS #9 [RFC2985].
    26  
    27  ub-emailaddress-length INTEGER ::= 255
    28  
    29  ************************************************/
    30  
    31  import (
    32  	"unicode/utf8"
    33  
    34  	"github.com/zmap/zcrypto/x509"
    35  	"github.com/zmap/zlint/util"
    36  )
    37  
    38  type subjectEmailMaxLength struct{}
    39  
    40  func (l *subjectEmailMaxLength) Initialize() error {
    41  	return nil
    42  }
    43  
    44  func (l *subjectEmailMaxLength) CheckApplies(c *x509.Certificate) bool {
    45  	return true
    46  }
    47  
    48  func (l *subjectEmailMaxLength) Execute(c *x509.Certificate) *LintResult {
    49  	for _, j := range c.Subject.EmailAddress {
    50  		if utf8.RuneCountInString(j) > 255 {
    51  			return &LintResult{Status: Error}
    52  		}
    53  	}
    54  
    55  	return &LintResult{Status: Pass}
    56  }
    57  
    58  func init() {
    59  	RegisterLint(&Lint{
    60  		Name:          "e_subject_email_max_length",
    61  		Description:   "The 'Email' field of the subject MUST be less than 255 characters",
    62  		Citation:      "RFC 5280: A.1",
    63  		Source:        RFC5280,
    64  		EffectiveDate: util.RFC2459Date,
    65  		Lint:          &subjectEmailMaxLength{},
    66  	})
    67  }