github.com/zmap/zlint@v1.1.0/lints/lint_ext_name_constraints_not_in_ca.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: 4.2.1.10
    19  The name constraints extension, which MUST be used only in a CA
    20     certificate, indicates a name space within which all subject names in
    21     subsequent certificates in a certification path MUST be located.
    22     Restrictions apply to the subject distinguished name and apply to
    23     subject alternative names.  Restrictions apply only when the
    24     specified name form is present.  If no name of the type is in the
    25     certificate, the certificate is acceptable.
    26  ***********************************************************************/
    27  
    28  import (
    29  	"github.com/zmap/zcrypto/x509"
    30  	"github.com/zmap/zlint/util"
    31  )
    32  
    33  type nameConstraintNotCa struct{}
    34  
    35  func (l *nameConstraintNotCa) Initialize() error {
    36  	return nil
    37  }
    38  
    39  func (l *nameConstraintNotCa) CheckApplies(c *x509.Certificate) bool {
    40  	return util.IsExtInCert(c, util.NameConstOID)
    41  }
    42  
    43  func (l *nameConstraintNotCa) Execute(c *x509.Certificate) *LintResult {
    44  	if !util.IsCACert(c) {
    45  		return &LintResult{Status: Error}
    46  	} else {
    47  		return &LintResult{Status: Pass}
    48  	}
    49  }
    50  
    51  func init() {
    52  	RegisterLint(&Lint{
    53  		Name:          "e_ext_name_constraints_not_in_ca",
    54  		Description:   "The name constraints extension MUST only be used in CA certificates",
    55  		Citation:      "RFC 5280: 4.2.1.10",
    56  		Source:        RFC5280,
    57  		EffectiveDate: util.RFC2459Date,
    58  		Lint:          &nameConstraintNotCa{},
    59  	})
    60  }