github.com/zmap/zlint@v1.1.0/lints/lint_sub_ca_eku_valid_fields.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  	"github.com/zmap/zcrypto/x509"
    19  	"github.com/zmap/zlint/util"
    20  )
    21  
    22  type subCAEKUValidFields struct{}
    23  
    24  func (l *subCAEKUValidFields) Initialize() error {
    25  	return nil
    26  }
    27  
    28  func (l *subCAEKUValidFields) CheckApplies(c *x509.Certificate) bool {
    29  	return util.IsSubCA(c) && util.IsExtInCert(c, util.EkuSynOid)
    30  }
    31  
    32  func (l *subCAEKUValidFields) Execute(c *x509.Certificate) *LintResult {
    33  	validFieldsPresent := false
    34  	for _, ekuValue := range c.ExtKeyUsage {
    35  		if ekuValue == x509.ExtKeyUsageServerAuth ||
    36  			ekuValue == x509.ExtKeyUsageClientAuth {
    37  			validFieldsPresent = true
    38  		}
    39  	}
    40  	if validFieldsPresent {
    41  		return &LintResult{Status: Pass}
    42  	} else {
    43  		return &LintResult{Status: Notice}
    44  	}
    45  }
    46  
    47  func init() {
    48  	RegisterLint(&Lint{
    49  		Name:          "n_sub_ca_eku_not_technically_constrained",
    50  		Description:   "Subordinate CA extkeyUsage, either id-kp-serverAuth or id-kp-clientAuth or both values MUST be present to be technically constrained.",
    51  		Citation:      "BRs: 7.1.2.2",
    52  		Source:        CABFBaselineRequirements,
    53  		EffectiveDate: util.CABV116Date,
    54  		Lint:          &subCAEKUValidFields{},
    55  	})
    56  }