github.com/zmap/zlint@v1.1.0/lints/lint_ext_san_uri_relative.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).  The name
    20  MUST NOT be a relative URI, and it MUST follow the URI syntax and
    21  encoding rules specified in [RFC3986].  The name MUST include both a
    22  scheme (e.g., "http" or "ftp") and a scheme-specific-part.  URIs that
    23  include an authority ([RFC3986], Section 3.2) MUST include a fully
    24  qualified domain name or IP address as the host.  Rules for encoding
    25  Internationalized Resource Identifiers (IRIs) are specified in
    26  Section 7.4.
    27  *************************************************************************/
    28  
    29  import (
    30  	"net/url"
    31  
    32  	"github.com/zmap/zcrypto/x509"
    33  	"github.com/zmap/zlint/util"
    34  )
    35  
    36  type extSANURIRelative struct{}
    37  
    38  func (l *extSANURIRelative) Initialize() error {
    39  	return nil
    40  }
    41  
    42  func (l *extSANURIRelative) CheckApplies(c *x509.Certificate) bool {
    43  	return util.IsExtInCert(c, util.SubjectAlternateNameOID)
    44  }
    45  
    46  func (l *extSANURIRelative) Execute(c *x509.Certificate) *LintResult {
    47  	for _, uri := range c.URIs {
    48  		parsed_uri, err := url.Parse(uri)
    49  
    50  		if err != nil {
    51  			return &LintResult{Status: Error}
    52  		}
    53  
    54  		if !parsed_uri.IsAbs() {
    55  			return &LintResult{Status: Error}
    56  		}
    57  	}
    58  	return &LintResult{Status: Pass}
    59  }
    60  
    61  func init() {
    62  	RegisterLint(&Lint{
    63  		Name:          "e_ext_san_uri_relative",
    64  		Description:   "When the subjectAlternateName extension is present and a URI is used, the name MUST NOT be a relative URI",
    65  		Citation:      "RFC 5280: 4.2.1.6",
    66  		Source:        RFC5280,
    67  		EffectiveDate: util.RFC5280Date,
    68  		Lint:          &extSANURIRelative{},
    69  	})
    70  }