github.com/zmap/zlint@v1.1.0/lints/lint_ext_san_uri_format_invalid.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  The name MUST include both a
    19  scheme (e.g., "http" or "ftp") and a scheme-specific-part.
    20  ************************************************/
    21  
    22  import (
    23  	"net/url"
    24  
    25  	"github.com/zmap/zcrypto/x509"
    26  	"github.com/zmap/zlint/util"
    27  )
    28  
    29  type extSANURIFormatInvalid struct{}
    30  
    31  func (l *extSANURIFormatInvalid) Initialize() error {
    32  	return nil
    33  }
    34  
    35  func (l *extSANURIFormatInvalid) CheckApplies(c *x509.Certificate) bool {
    36  	return util.IsExtInCert(c, util.SubjectAlternateNameOID)
    37  }
    38  
    39  func (l *extSANURIFormatInvalid) Execute(c *x509.Certificate) *LintResult {
    40  	for _, uri := range c.URIs {
    41  		parsed_uri, err := url.Parse(uri)
    42  
    43  		if err != nil {
    44  			return &LintResult{Status: Error}
    45  		}
    46  
    47  		//scheme
    48  		if parsed_uri.Scheme == "" {
    49  			return &LintResult{Status: Error}
    50  		}
    51  
    52  		//scheme-specific part
    53  		if parsed_uri.Host == "" && parsed_uri.User == nil && parsed_uri.Opaque == "" && parsed_uri.Path == "" {
    54  			return &LintResult{Status: Error}
    55  		}
    56  	}
    57  	return &LintResult{Status: Pass}
    58  }
    59  
    60  func init() {
    61  	RegisterLint(&Lint{
    62  		Name:          "e_ext_san_uri_format_invalid",
    63  		Description:   "URIs in SAN extension must have a scheme and scheme specific part",
    64  		Citation:      "RFC5280: 4.2.1.6",
    65  		Source:        RFC5280,
    66  		EffectiveDate: util.RFC5280Date,
    67  		Lint:          &extSANURIFormatInvalid{},
    68  	})
    69  }