github.com/zmap/zlint@v1.1.0/lints/lint_ext_san_uri_not_ia5.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  When the subjectAltName extension contains a URI, the name MUST be
    19  stored in the uniformResourceIdentifier (an IA5String).
    20  ************************************************/
    21  
    22  import (
    23  	"unicode"
    24  
    25  	"github.com/zmap/zcrypto/x509"
    26  	"github.com/zmap/zlint/util"
    27  )
    28  
    29  type extSANURINotIA5 struct{}
    30  
    31  func (l *extSANURINotIA5) Initialize() error {
    32  	return nil
    33  }
    34  
    35  func (l *extSANURINotIA5) CheckApplies(c *x509.Certificate) bool {
    36  	return util.IsExtInCert(c, util.SubjectAlternateNameOID)
    37  }
    38  
    39  func (l *extSANURINotIA5) Execute(c *x509.Certificate) *LintResult {
    40  	for _, uri := range c.URIs {
    41  		for _, c := range uri {
    42  			if c > unicode.MaxASCII {
    43  				return &LintResult{Status: Error}
    44  			}
    45  		}
    46  	}
    47  	return &LintResult{Status: Pass}
    48  }
    49  
    50  func init() {
    51  	RegisterLint(&Lint{
    52  		Name:          "e_ext_san_uri_not_ia5",
    53  		Description:   "When subjectAlternateName contains a URI, the name MUST be an IA5 string",
    54  		Citation:      "RFC5280: 4.2.1.6",
    55  		Source:        RFC5280,
    56  		EffectiveDate: util.RFC5280Date,
    57  		Lint:          &extSANURINotIA5{},
    58  	})
    59  }