github.com/zmap/zlint@v1.1.0/lints/lint_sub_cert_key_usage_crl_sign_bit_set.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  BRs: 7.1.2.3
    19  keyUsage (optional)
    20  If present, bit positions for keyCertSign and cRLSign MUST NOT be set.
    21  ***************************************************************************/
    22  
    23  import (
    24  	"github.com/zmap/zcrypto/x509"
    25  	"github.com/zmap/zlint/util"
    26  )
    27  
    28  type subCrlSignAllowed struct{}
    29  
    30  func (l *subCrlSignAllowed) Initialize() error {
    31  	return nil
    32  }
    33  
    34  func (l *subCrlSignAllowed) CheckApplies(c *x509.Certificate) bool {
    35  	return util.IsExtInCert(c, util.KeyUsageOID) && !util.IsCACert(c)
    36  }
    37  
    38  func (l *subCrlSignAllowed) Execute(c *x509.Certificate) *LintResult {
    39  	// Add actual lint here
    40  	if (c.KeyUsage & x509.KeyUsageCRLSign) == x509.KeyUsageCRLSign {
    41  		return &LintResult{Status: Error}
    42  	} else { //key usage doesn't allow cert signing or isn't present
    43  		return &LintResult{Status: Pass}
    44  	}
    45  }
    46  
    47  func init() {
    48  	RegisterLint(&Lint{
    49  		Name:          "e_sub_cert_key_usage_crl_sign_bit_set",
    50  		Description:   "Subscriber Certificate: keyUsage if present, bit positions for keyCertSign and cRLSign MUST NOT be set.",
    51  		Citation:      "BRs: 7.1.2.3",
    52  		Source:        CABFBaselineRequirements,
    53  		EffectiveDate: util.CABEffectiveDate,
    54  		Lint:          &subCrlSignAllowed{},
    55  	})
    56  }