github.com/zmap/zlint@v1.1.0/lints/lint_ca_key_usage_missing.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: 4.2.1.3
    19  Conforming CAs MUST include this extension in certificates that
    20     contain public keys that are used to validate digital signatures on
    21     other public key certificates or CRLs.  When present, conforming CAs
    22     SHOULD mark this extension as critical.
    23  ************************************************/
    24  
    25  import (
    26  	"github.com/zmap/zcrypto/x509"
    27  	"github.com/zmap/zlint/util"
    28  )
    29  
    30  type caKeyUsageMissing struct{}
    31  
    32  func (l *caKeyUsageMissing) Initialize() error {
    33  	return nil
    34  }
    35  
    36  func (l *caKeyUsageMissing) CheckApplies(c *x509.Certificate) bool {
    37  	return c.IsCA
    38  }
    39  
    40  func (l *caKeyUsageMissing) Execute(c *x509.Certificate) *LintResult {
    41  	if c.KeyUsage != x509.KeyUsage(0) {
    42  		return &LintResult{Status: Pass}
    43  	} else {
    44  		return &LintResult{Status: Error}
    45  	}
    46  }
    47  
    48  func init() {
    49  	RegisterLint(&Lint{
    50  		Name:          "e_ca_key_usage_missing",
    51  		Description:   "Root and Subordinate CA certificate keyUsage extension MUST be present",
    52  		Citation:      "BRs: 7.1.2.1, RFC 5280: 4.2.1.3",
    53  		Source:        CABFBaselineRequirements,
    54  		EffectiveDate: util.RFC3280Date,
    55  		Lint:          &caKeyUsageMissing{},
    56  	})
    57  }