github.com/zmap/zlint@v1.1.0/lints/lint_sub_ca_eku_critical.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: 7.1.2.2g extkeyUsage (optional)
    19  For Subordinate CA Certificates to be Technically constrained in line with section 7.1.5, then either the value
    20  id‐kp‐serverAuth [RFC5280] or id‐kp‐clientAuth [RFC5280] or both values MUST be present**.
    21  Other values MAY be present.
    22  If present, this extension SHOULD be marked non‐critical.
    23  ************************************************/
    24  
    25  import (
    26  	"github.com/zmap/zcrypto/x509"
    27  	"github.com/zmap/zlint/util"
    28  )
    29  
    30  type subCAEKUCrit struct{}
    31  
    32  func (l *subCAEKUCrit) Initialize() error {
    33  	return nil
    34  }
    35  
    36  func (l *subCAEKUCrit) CheckApplies(c *x509.Certificate) bool {
    37  	return util.IsSubCA(c) && util.IsExtInCert(c, util.EkuSynOid)
    38  }
    39  
    40  func (l *subCAEKUCrit) Execute(c *x509.Certificate) *LintResult {
    41  	if e := util.GetExtFromCert(c, util.EkuSynOid); e.Critical {
    42  		return &LintResult{Status: Warn}
    43  	} else {
    44  		return &LintResult{Status: Pass}
    45  	}
    46  }
    47  
    48  func init() {
    49  	RegisterLint(&Lint{
    50  		Name:          "w_sub_ca_eku_critical",
    51  		Description:   "Subordinate CA certificate extkeyUsage extension should be marked non-critical if present",
    52  		Citation:      "BRs: 7.1.2.2",
    53  		Source:        CABFBaselineRequirements,
    54  		EffectiveDate: util.CABV116Date,
    55  		Lint:          &subCAEKUCrit{},
    56  	})
    57  }