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CABF SMIME 7.1.4.2.h If present, the subject:emailAddress SHALL conta…
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…in a single Mailbox Address (#752)

* CABF SMIMS 4.1.4.2.h If present, the subject:emailAddress SHALL contain a single Mailbox Address

* go imports the files
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@christopher-henderson
christopher-henderson authored Oct 16, 2023
1 parent 2f0f4b8 commit 2f54486
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58 changes: 58 additions & 0 deletions v3/lints/cabf_smime_br/lint_single_email_if_present.go
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/*
* ZLint Copyright 2023 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.
*/

package cabf_smime_br

import (
"fmt"

"github.com/zmap/zcrypto/x509"
"github.com/zmap/zlint/v3/lint"
"github.com/zmap/zlint/v3/util"
)

func init() {
lint.RegisterLint(&lint.Lint{
Name: "e_single_email_if_present",
Description: "If present, the subject:emailAddress SHALL contain a single Mailbox Address",
Citation: "7.1.4.2.h",
Source: lint.CABFSMIMEBaselineRequirements,
EffectiveDate: util.CABF_SMIME_BRs_1_0_0_Date,
Lint: func() lint.LintInterface { return &singleEmailIfPresent{} },
})
}

type singleEmailIfPresent struct{}

func NewSingleEmailIfPresent() lint.LintInterface {
return &singleEmailIfPresent{}
}

func (l *singleEmailIfPresent) CheckApplies(c *x509.Certificate) bool {
return util.IsSubscriberCert(c) && c.EmailAddresses != nil && len(c.EmailAddresses) != 0
}

func (l *singleEmailIfPresent) Execute(c *x509.Certificate) *lint.LintResult {
if len(c.EmailAddresses) == 1 {
return &lint.LintResult{
Status: lint.Pass,
}
} else {
return &lint.LintResult{
Status: lint.Error,
Details: fmt.Sprintf("subject:emailAddress was present and containted %d names (%s)", len(c.EmailAddresses), c.EmailAddresses),
LintMetadata: lint.LintMetadata{},
}
}
}
40 changes: 40 additions & 0 deletions v3/lints/cabf_smime_br/lint_single_email_if_present_test.go
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package cabf_smime_br

import (
"testing"

"github.com/zmap/zlint/v3/lint"
"github.com/zmap/zlint/v3/test"
)

func TestSingleEmailIfPresent(t *testing.T) {
testCases := []struct {
Name string
InputFilename string
ExpectedResult lint.LintStatus
}{
{
Name: "pass - cert with one email address",
InputFilename: "smime/single_email_present.pem",
ExpectedResult: lint.Pass,
},
{
Name: "NA - cert with no email addresses",
InputFilename: "smime/no_email_present.pem",
ExpectedResult: lint.NA,
},
{
Name: "Error - cert with multiple email addresses",
InputFilename: "smime/multiple_email_present.pem",
ExpectedResult: lint.Error,
},
}
for _, tc := range testCases {
t.Run(tc.Name, func(t *testing.T) {
result := test.TestLint("e_single_email_if_present", tc.InputFilename)
if result.Status != tc.ExpectedResult {
t.Errorf("expected result %v was %v - details: %v", tc.ExpectedResult, result.Status, result.Details)
}
})
}
}
41 changes: 41 additions & 0 deletions v3/testdata/smime/multiple_email_present.pem
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Certificate:
Data:
Version: 3 (0x2)
Serial Number: 3 (0x3)
Signature Algorithm: ecdsa-with-SHA256
Issuer:
Validity
Not Before: Oct 15 17:52:28 2023 GMT
Not After : Nov 30 00:00:00 9998 GMT
Subject:
Subject Public Key Info:
Public Key Algorithm: id-ecPublicKey
Public-Key: (256 bit)
pub:
04:cb:41:d2:58:66:06:29:c0:c8:bf:c9:20:76:7f:
49:a7:6d:2a:f1:f4:7f:36:4c:94:b4:91:ac:6d:76:
29:65:11:d0:34:0b:d5:d2:53:e0:dd:86:42:5b:ee:
37:ca:bb:a0:bc:be:73:7f:61:cb:45:af:8e:46:74:
ce:4b:9a:ff:a2
ASN1 OID: prime256v1
NIST CURVE: P-256
X509v3 extensions:
X509v3 Extended Key Usage:
E-mail Protection
X509v3 Subject Alternative Name:
email:coolguy@coolplace.com, email:drumsolo@rockstar.org
Signature Algorithm: ecdsa-with-SHA256
Signature Value:
30:46:02:21:00:90:32:cc:3f:a1:bf:31:e7:be:57:8f:a7:30:
33:bc:ed:2f:92:9a:7a:69:50:bc:7f:e1:72:aa:b1:25:1a:2e:
fe:02:21:00:c1:88:2d:90:b9:72:d4:03:12:c3:45:3a:b5:f3:
45:72:23:9c:65:73:b4:5e:50:cd:f6:bc:4c:a7:ba:8e:6d:b8
-----BEGIN CERTIFICATE-----
MIIBQTCB56ADAgECAgEDMAoGCCqGSM49BAMCMAAwIBcNMjMxMDE1MTc1MjI4WhgP
OTk5ODExMzAwMDAwMDBaMAAwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAATLQdJY
ZgYpwMi/ySB2f0mnbSrx9H82TJS0kaxtdillEdA0C9XSU+DdhkJb7jfKu6C8vnN/
YctFr45GdM5Lmv+io1AwTjATBgNVHSUEDDAKBggrBgEFBQcDBDA3BgNVHREEMDAu
gRVjb29sZ3V5QGNvb2xwbGFjZS5jb22BFWRydW1zb2xvQHJvY2tzdGFyLm9yZzAK
BggqhkjOPQQDAgNJADBGAiEAkDLMP6G/Mee+V4+nMDO87S+SmnppULx/4XKqsSUa
Lv4CIQDBiC2QuXLUAxLDRTq180VyI5xlc7ReUM32vEynuo5tuA==
-----END CERTIFICATE-----
38 changes: 38 additions & 0 deletions v3/testdata/smime/no_email_present.pem
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Certificate:
Data:
Version: 3 (0x2)
Serial Number: 3 (0x3)
Signature Algorithm: ecdsa-with-SHA256
Issuer:
Validity
Not Before: Oct 15 17:53:09 2023 GMT
Not After : Nov 30 00:00:00 9998 GMT
Subject:
Subject Public Key Info:
Public Key Algorithm: id-ecPublicKey
Public-Key: (256 bit)
pub:
04:4f:e8:85:20:80:1b:21:66:01:b1:ff:0b:db:f6:
f9:51:6d:d7:66:f4:64:2b:67:b3:31:99:65:35:97:
9d:d1:69:29:b7:d3:15:65:84:8a:55:24:21:78:a5:
89:43:be:14:b6:9f:8e:8f:63:50:85:62:44:52:4c:
59:a1:0a:65:70
ASN1 OID: prime256v1
NIST CURVE: P-256
X509v3 extensions:
X509v3 Extended Key Usage:
E-mail Protection
Signature Algorithm: ecdsa-with-SHA256
Signature Value:
30:45:02:20:77:4e:a8:1e:bc:68:c9:ff:83:7b:ac:dc:16:2b:
cb:8f:38:1c:95:81:a5:db:55:93:fe:2a:ac:53:a7:f2:e2:4c:
02:21:00:b0:9b:8b:b0:1f:a4:b6:3f:7e:8d:01:6e:0b:98:43:
a1:95:aa:8f:79:31:1d:35:5a:ed:3c:a1:30:2c:c6:1a:b2
-----BEGIN CERTIFICATE-----
MIIBBzCBrqADAgECAgEDMAoGCCqGSM49BAMCMAAwIBcNMjMxMDE1MTc1MzA5WhgP
OTk5ODExMzAwMDAwMDBaMAAwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAARP6IUg
gBshZgGx/wvb9vlRbddm9GQrZ7MxmWU1l53RaSm30xVlhIpVJCF4pYlDvhS2n46P
Y1CFYkRSTFmhCmVwoxcwFTATBgNVHSUEDDAKBggrBgEFBQcDBDAKBggqhkjOPQQD
AgNIADBFAiB3TqgevGjJ/4N7rNwWK8uPOByVgaXbVZP+KqxTp/LiTAIhALCbi7Af
pLY/fo0BbguYQ6GVqo95MR01Wu08oTAsxhqy
-----END CERTIFICATE-----
41 changes: 41 additions & 0 deletions v3/testdata/smime/single_email_present.pem
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Certificate:
Data:
Version: 3 (0x2)
Serial Number: 3 (0x3)
Signature Algorithm: ecdsa-with-SHA256
Issuer:
Validity
Not Before: Oct 15 17:49:19 2023 GMT
Not After : Nov 30 00:00:00 9998 GMT
Subject:
Subject Public Key Info:
Public Key Algorithm: id-ecPublicKey
Public-Key: (256 bit)
pub:
04:ef:76:01:b8:fe:88:a0:d2:69:ea:ed:d0:16:0f:
b2:57:f3:b9:a5:8c:50:e2:f6:82:ff:fc:6b:b6:0a:
41:23:cb:dc:52:6f:26:1e:9b:c1:db:aa:26:9e:c0:
58:6d:bc:ea:d1:1b:b3:55:ec:dd:dc:93:ed:07:36:
06:44:f5:02:9c
ASN1 OID: prime256v1
NIST CURVE: P-256
X509v3 extensions:
X509v3 Extended Key Usage:
E-mail Protection
X509v3 Subject Alternative Name:
email:coolguy@coolplace.com
Signature Algorithm: ecdsa-with-SHA256
Signature Value:
30:45:02:20:58:18:e5:5b:31:e1:83:a6:5e:5c:76:40:fe:eb:
a2:82:3a:2b:d9:e0:0f:09:f6:d2:b7:ae:5e:e4:a7:36:13:e5:
02:21:00:f6:f8:43:f6:76:2d:18:af:33:91:20:71:78:f5:2a:
9e:9b:08:66:98:c6:ef:bf:cb:06:b9:62:7e:c2:44:92:51
-----BEGIN CERTIFICATE-----
MIIBKTCB0KADAgECAgEDMAoGCCqGSM49BAMCMAAwIBcNMjMxMDE1MTc0OTE5WhgP
OTk5ODExMzAwMDAwMDBaMAAwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAATvdgG4
/oig0mnq7dAWD7JX87mljFDi9oL//Gu2CkEjy9xSbyYem8HbqiaewFhtvOrRG7NV
7N3ck+0HNgZE9QKcozkwNzATBgNVHSUEDDAKBggrBgEFBQcDBDAgBgNVHREEGTAX
gRVjb29sZ3V5QGNvb2xwbGFjZS5jb20wCgYIKoZIzj0EAwIDSAAwRQIgWBjlWzHh
g6ZeXHZA/uuigjor2eAPCfbSt65e5Kc2E+UCIQD2+EP2di0YrzORIHF49Sqemwhm
mMbvv8sGuWJ+wkSSUQ==
-----END CERTIFICATE-----

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