/
lint_ext_san_rfc822_format_invalid.go
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/
lint_ext_san_rfc822_format_invalid.go
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package lints
/*
* ZLint Copyright 2018 Regents of the University of Michigan
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
/************************************************************************
RFC 5280: 4.2.1.6
When the subjectAltName extension contains an Internet mail address,
the address MUST be stored in the rfc822Name. The format of an
rfc822Name is a "Mailbox" as defined in Section 4.1.2 of [RFC2821].
A Mailbox has the form "Local-part@Domain". Note that a Mailbox has
no phrase (such as a common name) before it, has no comment (text
surrounded in parentheses) after it, and is not surrounded by "<" and
">". Rules for encoding Internet mail addresses that include
internationalized domain names are specified in Section 7.5.
************************************************************************/
import (
"strings"
"github.com/zmap/zcrypto/x509"
"github.com/zmap/zlint/util"
)
type invalidEmail struct{}
func (l *invalidEmail) Initialize() error {
return nil
}
func (l *invalidEmail) CheckApplies(c *x509.Certificate) bool {
return util.IsExtInCert(c, util.SubjectAlternateNameOID)
}
func (l *invalidEmail) Execute(c *x509.Certificate) *LintResult {
for _, str := range c.EmailAddresses {
if str == "" {
continue
}
if strings.Contains(str, " ") {
return &LintResult{Status: Error}
} else if str[0] == '<' || str[len(str)-1] == ')' {
return &LintResult{Status: Error}
}
}
return &LintResult{Status: Pass}
}
func init() {
RegisterLint(&Lint{
Name: "e_ext_san_rfc822_format_invalid",
Description: "Email MUST NOT be surrounded with `<>`, and there must be no trailing comments in `()`",
Citation: "RFC 5280: 4.2.1.6",
Source: RFC5280,
EffectiveDate: util.RFC2459Date,
Lint: &invalidEmail{},
})
}