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

     1  /*
     2   * ZLint Copyright 2019 Regents of the University of Michigan
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License"); you may not
     5   * use this file except in compliance with the License. You may obtain a copy
     6   * of the License at http://www.apache.org/licenses/LICENSE-2.0
     7   *
     8   * Unless required by applicable law or agreed to in writing, software
     9   * distributed under the License is distributed on an "AS IS" BASIS,
    10   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
    11   * implied. See the License for the specific language governing
    12   * permissions and limitations under the License.
    13   */
    14  
    15  package lints
    16  
    17  import (
    18  	"github.com/zmap/zcrypto/x509"
    19  	"github.com/zmap/zlint/util"
    20  )
    21  
    22  type extraSubjectCommonNames struct{}
    23  
    24  func (l *extraSubjectCommonNames) Initialize() error {
    25  	return nil
    26  }
    27  
    28  func (l *extraSubjectCommonNames) CheckApplies(c *x509.Certificate) bool {
    29  	return util.IsSubscriberCert(c)
    30  }
    31  
    32  func (l *extraSubjectCommonNames) Execute(c *x509.Certificate) *LintResult {
    33  	// Multiple subject commonName fields are not expressly prohibited by section
    34  	// 7.1.4.2.2 but do seem to run afoul of the intent. For that reason we return
    35  	// only a Warn level finding here.
    36  	if len(c.Subject.CommonNames) > 1 {
    37  		return &LintResult{Status: Warn}
    38  	}
    39  	return &LintResult{Status: Pass}
    40  }
    41  
    42  func init() {
    43  	RegisterLint(&Lint{
    44  		Name:          "w_extra_subject_common_names",
    45  		Description:   "if present the subject commonName field MUST contain a single IP address or Fully-Qualified Domain Name",
    46  		Citation:      "BRs: 7.1.4.2.2",
    47  		Source:        CABFBaselineRequirements,
    48  		EffectiveDate: util.CABEffectiveDate,
    49  		Lint:          &extraSubjectCommonNames{},
    50  	})
    51  }