github.com/zmap/zlint@v1.1.0/lints/lint_san_dns_name_starts_with_period.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  	"strings"
    19  
    20  	"github.com/zmap/zcrypto/x509"
    21  	"github.com/zmap/zlint/util"
    22  )
    23  
    24  type SANDNSPeriod struct{}
    25  
    26  func (l *SANDNSPeriod) Initialize() error {
    27  	return nil
    28  }
    29  
    30  func (l *SANDNSPeriod) CheckApplies(c *x509.Certificate) bool {
    31  	return util.IsExtInCert(c, util.SubjectAlternateNameOID)
    32  }
    33  
    34  func (l *SANDNSPeriod) Execute(c *x509.Certificate) *LintResult {
    35  	for _, dns := range c.DNSNames {
    36  		if strings.HasPrefix(dns, ".") {
    37  			return &LintResult{Status: Error}
    38  		}
    39  	}
    40  	return &LintResult{Status: Pass}
    41  }
    42  
    43  func init() {
    44  	RegisterLint(&Lint{
    45  		Name:          "e_san_dns_name_starts_with_period",
    46  		Description:   "DNSName MUST NOT start with a period",
    47  		Citation:      "awslabs certlint",
    48  		Source:        AWSLabs,
    49  		EffectiveDate: util.ZeroDate,
    50  		Lint:          &SANDNSPeriod{},
    51  	})
    52  }