CABF SMIME BR Appendix A.1 - countryName matches registration scheme id

v3/lints/cabf_smime_br/lint_registration_scheme_id_matches_subject_country.go

@@ -0,0 +1,94 @@
+/*
+ * 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"
+	"regexp"
+
+	"github.com/zmap/zcrypto/x509"
+	"github.com/zmap/zlint/v3/lint"
+	"github.com/zmap/zlint/v3/util"
+)	
+
+// Regex to match the start of an organization identifier: 3 character registration scheme identifier and 2 character ISO 3166 country code
+var countryRegex = regexp.MustCompile(`^([A-Z]{3})([A-Z]{2})`)
+
+func init() {
+	lint.RegisterCertificateLint(&lint.CertificateLint{
+		LintMetadata: lint.LintMetadata{
+			Name:          "e_registration_scheme_id_matches_subject_country",
+			Description:   "The country code used in the Registration Scheme identifier SHALL match that of the subject:countryName in the Certificate as specified in Section 7.1.4.2.2",
+			Citation:      "Appendix A A.1",
+			Source:        lint.CABFSMIMEBaselineRequirements,
+			EffectiveDate: util.CABF_SMIME_BRs_1_0_0_Date,
+		},
+		Lint: NewRegistrationSchemeIDMatchesSubjectCountry,
+	})
+}
+
+type registrationSchemeIDMatchesSubjectCountry struct{}
+
+// NewRegistrationSchemeIDMatchesSubjectCountry creates a new linter to enforce SHALL requirements for registration scheme identifiers matching subject:countryName
+func NewRegistrationSchemeIDMatchesSubjectCountry() lint.LintInterface {
+    return &registrationSchemeIDMatchesSubjectCountry{}
+}
+
+// CheckApplies returns true if the provided certificate contains subject:countryName and one-or-more of the following SMIME BR policy identifiers:
+//   - Organization Validated Strict
+//   - Organization Validated Multipurpose
+//   - Organization Validated Legacy
+//   - Sponsor Validated Strict
+//   - Sponsor Validated Multipurpose
+//   - Sponsor Validated Legacy
+func (l *registrationSchemeIDMatchesSubjectCountry) CheckApplies(c *x509.Certificate) bool {
+	if c.Subject.Country == nil {
+		return false
+	}
+
+	for _, id := range c.Subject.OrganizationIDs {
+		submatches := countryRegex.FindStringSubmatch(id)
+		if len(submatches) < 3 {
+			return false
+		}
+	}
+
+	return util.IsOrganizationValidatedCertificate(c) || util.IsSponsorValidatedCertificate(c)
+}
+
+// Execute applies the requirements on matching subject:countryName with registration scheme identifiers
+func (l *registrationSchemeIDMatchesSubjectCountry) Execute(c *x509.Certificate) *lint.LintResult {
+	country := c.Subject.Country[0]
+
+	for _, id := range c.Subject.OrganizationIDs {
+		if err := verifySMIMEOrganizationIdentifierContainsSubjectNameCountry(id, country); err != nil {
+			return &lint.LintResult{Status: lint.Error, Details: err.Error()}
+		}
+	}
+	return &lint.LintResult{Status: lint.Pass}
+}
+
+// verifySMIMEOrganizationIdentifierContainSubjectNameCountry verifies that the country code used in the subject:organizationIdentifier matches subject:countryName
+func verifySMIMEOrganizationIdentifierContainsSubjectNameCountry(id string, country string) error {
+	submatches := countryRegex.FindStringSubmatch(id)
+	// Captures the country code from the organization identifier
+	identifierCountry := submatches[2]
+
+	if identifierCountry != country {
+		return fmt.Errorf("the country code used in the Registration Scheme identifier SHALL match that of the subject:countryName")
+	}
+
+	return nil
+}

v3/lints/cabf_smime_br/lint_registration_scheme_id_matches_subject_country_test.go

@@ -0,0 +1,64 @@
+package cabf_smime_br
+
+import (
+	"testing"
+
+	"github.com/zmap/zlint/v3/lint"
+	"github.com/zmap/zlint/v3/test"
+)
+
+func TestRegistrationSchemeIDMatchesSubjectNameCountry(t *testing.T) {
+
+	testCases := []struct {
+		Name            string
+		InputFilename   string
+		ExpectedResult  lint.LintStatus
+		ExpectedDetails string
+	}{
+		{
+			Name:           "pass - organization validated certificate with subject:Name:Country matching subject:organizationIdentifier",
+			InputFilename:  "smime/organization_validated_with_matching_country.pem",
+			ExpectedResult: lint.Pass,
+		},
+		{
+			Name:           "pass - sponsor validated certificate with subject:Name:Country matching subject:organizationIdentifier",
+			InputFilename:  "smime/sponsor_validated_with_matching_country.pem",
+			ExpectedResult: lint.Pass,
+		},
+		{
+			Name:            "error - individual validated certificate",
+			InputFilename:   "smime/individual_validated_with_matching_country.pem",
+			ExpectedResult:  lint.NA,
+		},
+		{
+			Name:            "error - no country specified in certificate",
+			InputFilename:   "smime/organization_validatged_with_no_country_specified.pem",
+			ExpectedResult:  lint.NA,
+		},
+		{
+			Name:            "error - organization validated certificate with subject:organizationIdentifier in incorrect format",
+			InputFilename:   "smime/organization_validated_with_incorrect_format_identifier.pem",
+			ExpectedResult:  lint.NA,
+			},
+		{
+			Name:            "error - organization validated certificate with subject:Name:Country not matching subject:organizationIdentifier",
+			InputFilename:   "smime/organization_validated_with_non_matching_country.pem",
+			ExpectedResult:  lint.Error,
+			ExpectedDetails: "the country code used in the Registration Scheme identifier SHALL match that of the subject:countryName",
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.Name, func(t *testing.T) {
+			result := test.TestLint("e_registration_scheme_id_matches_subject_country", tc.InputFilename)
+			if result.Status != tc.ExpectedResult {
+				t.Errorf("expected result %v was %v", tc.ExpectedResult, result.Status)
+			}
+
+			if tc.ExpectedDetails != result.Details {
+				t.Errorf("expected details: %q, was %q", tc.ExpectedDetails, result.Details)
+			}
+		})
+	}
+
+}

v3/testdata/smime/individual_validated_with_matching_country.pem

@@ -0,0 +1,39 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 3 (0x3)
+        Signature Algorithm: ecdsa-with-SHA256
+        Issuer: 
+        Validity
+            Not Before: Sep  1 00:00:00 2023 GMT
+            Not After : Nov 30 00:00:00 9998 GMT
+        Subject: C = GB, organizationIdentifier = NTRGB-12345678
+        Subject Public Key Info:
+            Public Key Algorithm: id-ecPublicKey
+                Public-Key: (256 bit)
+                pub:
+                    04:f5:60:29:a4:49:91:2e:f8:98:b6:f2:77:ca:a1:
+                    e8:ef:3f:61:38:dc:14:52:fe:fb:76:40:f3:48:11:
+                    4f:62:5d:39:7b:1c:e4:64:e3:bc:8c:ef:67:c8:cd:
+                    43:54:2e:6c:7d:78:94:20:80:a0:79:26:47:0b:93:
+                    4e:c1:6b:06:35
+                ASN1 OID: prime256v1
+                NIST CURVE: P-256
+        X509v3 extensions:
+            X509v3 Certificate Policies: 
+                Policy: 2.23.140.1.5.4.1
+    Signature Algorithm: ecdsa-with-SHA256
+    Signature Value:
+        30:46:02:21:00:ac:c2:22:ab:e6:e8:2e:43:3e:44:49:3f:46:
+        26:d3:a5:2d:7f:dd:9e:7c:09:54:5d:10:12:b7:e8:42:36:05:
+        27:02:21:00:fc:37:86:54:2f:48:ac:84:4d:a5:32:ad:6b:f0:
+        a4:1d:39:c5:dc:eb:43:a7:f8:c1:4e:c5:68:f8:d0:0e:61:fe
+-----BEGIN CERTIFICATE-----
+MIIBLzCB1aADAgECAgEDMAoGCCqGSM49BAMCMAAwIBcNMjMwOTAxMDAwMDAwWhgP
+OTk5ODExMzAwMDAwMDBaMCYxCzAJBgNVBAYTAkdCMRcwFQYDVQRhEw5OVFJHQi0x
+MjM0NTY3ODBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABPVgKaRJkS74mLbyd8qh
+6O8/YTjcFFL++3ZA80gRT2JdOXsc5GTjvIzvZ8jNQ1QubH14lCCAoHkmRwuTTsFr
+BjWjGDAWMBQGA1UdIAQNMAswCQYHZ4EMAQUEATAKBggqhkjOPQQDAgNJADBGAiEA
+rMIiq+boLkM+REk/RibTpS1/3Z58CVRdEBK36EI2BScCIQD8N4ZUL0ishE2lMq1r
+8KQdOcXc60On+MFOxWj40A5h/g==
+-----END CERTIFICATE-----

v3/testdata/smime/organization_validated_with_incorrect_format_identifier.pem

@@ -0,0 +1,39 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 3 (0x3)
+        Signature Algorithm: ecdsa-with-SHA256
+        Issuer: 
+        Validity
+            Not Before: Sep  1 00:00:00 2023 GMT
+            Not After : Nov 30 00:00:00 9998 GMT
+        Subject: C = GB, organizationIdentifier = NGB-12345678
+        Subject Public Key Info:
+            Public Key Algorithm: id-ecPublicKey
+                Public-Key: (256 bit)
+                pub:
+                    04:12:e7:c6:32:81:8f:3e:cb:5a:9b:45:25:53:a6:
+                    04:0a:b9:87:2a:92:c6:1c:df:ee:bf:65:66:2a:84:
+                    a0:1a:f3:42:7a:8f:13:35:e0:7c:51:73:8c:dc:b5:
+                    51:62:7b:06:71:09:22:20:85:3f:28:02:70:5b:22:
+                    53:9d:8a:69:10
+                ASN1 OID: prime256v1
+                NIST CURVE: P-256
+        X509v3 extensions:
+            X509v3 Certificate Policies: 
+                Policy: 2.23.140.1.5.2.1
+    Signature Algorithm: ecdsa-with-SHA256
+    Signature Value:
+        30:46:02:21:00:a4:b8:3c:57:91:01:1e:27:ed:77:e2:94:fb:
+        4f:75:bb:5a:74:72:28:32:7f:bc:62:08:1f:61:32:91:29:83:
+        4c:02:21:00:fe:ec:86:77:78:58:b5:fe:90:04:6a:9f:b8:ca:
+        01:d3:82:4e:7b:64:90:f5:c3:7d:16:3e:60:30:7b:ab:83:90
+-----BEGIN CERTIFICATE-----
+MIIBLTCB06ADAgECAgEDMAoGCCqGSM49BAMCMAAwIBcNMjMwOTAxMDAwMDAwWhgP
+OTk5ODExMzAwMDAwMDBaMCQxCzAJBgNVBAYTAkdCMRUwEwYDVQRhEwxOR0ItMTIz
+NDU2NzgwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAAQS58YygY8+y1qbRSVTpgQK
+uYcqksYc3+6/ZWYqhKAa80J6jxM14HxRc4zctVFiewZxCSIghT8oAnBbIlOdimkQ
+oxgwFjAUBgNVHSAEDTALMAkGB2eBDAEFAgEwCgYIKoZIzj0EAwIDSQAwRgIhAKS4
+PFeRAR4n7XfilPtPdbtadHIoMn+8YggfYTKRKYNMAiEA/uyGd3hYtf6QBGqfuMoB
+04JOe2SQ9cN9Fj5gMHurg5A=
+-----END CERTIFICATE-----

v3/testdata/smime/organization_validated_with_matching_country.pem

@@ -0,0 +1,39 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 3 (0x3)
+        Signature Algorithm: ecdsa-with-SHA256
+        Issuer: 
+        Validity
+            Not Before: Sep  1 00:00:00 2023 GMT
+            Not After : Nov 30 00:00:00 9998 GMT
+        Subject: C = GB, organizationIdentifier = NTRGB-12345678
+        Subject Public Key Info:
+            Public Key Algorithm: id-ecPublicKey
+                Public-Key: (256 bit)
+                pub:
+                    04:37:a6:d9:19:6d:90:51:59:5c:db:c2:a8:27:b1:
+                    8d:c4:01:3b:87:cb:8d:5e:e9:1b:53:d2:e7:aa:9c:
+                    06:58:85:89:8b:e1:70:9c:23:12:d6:c1:7b:6b:22:
+                    6e:27:6b:01:a2:88:b6:77:90:a2:6d:f1:bf:26:04:
+                    f0:f2:3a:82:93
+                ASN1 OID: prime256v1
+                NIST CURVE: P-256
+        X509v3 extensions:
+            X509v3 Certificate Policies: 
+                Policy: 2.23.140.1.5.2.1
+    Signature Algorithm: ecdsa-with-SHA256
+    Signature Value:
+        30:46:02:21:00:9b:2b:51:2d:88:ab:f2:44:5f:9c:b6:14:81:
+        9c:c8:e3:21:e4:23:0d:9b:a0:71:77:b1:78:8c:da:a0:d3:a5:
+        eb:02:21:00:a3:6b:34:38:a4:9c:b2:a6:f3:4e:30:6a:41:2a:
+        aa:1f:9c:e3:84:98:4e:da:3a:bb:4e:06:46:2c:2c:ba:93:8b
+-----BEGIN CERTIFICATE-----
+MIIBLzCB1aADAgECAgEDMAoGCCqGSM49BAMCMAAwIBcNMjMwOTAxMDAwMDAwWhgP
+OTk5ODExMzAwMDAwMDBaMCYxCzAJBgNVBAYTAkdCMRcwFQYDVQRhEw5OVFJHQi0x
+MjM0NTY3ODBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABDem2RltkFFZXNvCqCex
+jcQBO4fLjV7pG1PS56qcBliFiYvhcJwjEtbBe2sibidrAaKItneQom3xvyYE8PI6
+gpOjGDAWMBQGA1UdIAQNMAswCQYHZ4EMAQUCATAKBggqhkjOPQQDAgNJADBGAiEA
+mytRLYir8kRfnLYUgZzI4yHkIw2boHF3sXiM2qDTpesCIQCjazQ4pJyypvNOMGpB
+KqofnOOEmE7aOrtOBkYsLLqTiw==
+-----END CERTIFICATE-----

v3/testdata/smime/organization_validated_with_non_matching_country.pem

@@ -0,0 +1,39 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 3 (0x3)
+        Signature Algorithm: ecdsa-with-SHA256
+        Issuer: 
+        Validity
+            Not Before: Sep  1 00:00:00 2023 GMT
+            Not After : Nov 30 00:00:00 9998 GMT
+        Subject: C = GB, organizationIdentifier = NTRFR-12345678
+        Subject Public Key Info:
+            Public Key Algorithm: id-ecPublicKey
+                Public-Key: (256 bit)
+                pub:
+                    04:d9:56:b4:43:cf:87:9f:20:71:a6:79:02:a2:57:
+                    c5:0a:d0:52:23:ac:c1:aa:d3:7e:f8:b5:f5:5b:8c:
+                    da:f1:17:24:5f:ee:55:a0:46:3d:2b:e0:a2:8a:0d:
+                    4f:4b:cb:9b:df:3e:de:0a:96:4d:fe:8a:aa:dc:24:
+                    38:3a:79:41:2b
+                ASN1 OID: prime256v1
+                NIST CURVE: P-256
+        X509v3 extensions:
+            X509v3 Certificate Policies: 
+                Policy: 2.23.140.1.5.2.1
+    Signature Algorithm: ecdsa-with-SHA256
+    Signature Value:
+        30:44:02:20:5f:3c:88:87:67:7c:f8:e7:d1:c4:b3:6f:7a:e1:
+        c4:f2:71:db:ae:3a:79:06:db:b0:2e:05:07:03:8d:b2:30:55:
+        02:20:24:3b:f2:be:35:0e:a9:70:21:33:1f:95:f9:44:42:62:
+        ea:35:77:63:fa:31:b4:04:e2:46:d9:55:a8:8d:24:cc
+-----BEGIN CERTIFICATE-----
+MIIBLTCB1aADAgECAgEDMAoGCCqGSM49BAMCMAAwIBcNMjMwOTAxMDAwMDAwWhgP
+OTk5ODExMzAwMDAwMDBaMCYxCzAJBgNVBAYTAkdCMRcwFQYDVQRhEw5OVFJGUi0x
+MjM0NTY3ODBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABNlWtEPPh58gcaZ5AqJX
+xQrQUiOswarTfvi19VuM2vEXJF/uVaBGPSvgoooNT0vLm98+3gqWTf6KqtwkODp5
+QSujGDAWMBQGA1UdIAQNMAswCQYHZ4EMAQUCATAKBggqhkjOPQQDAgNHADBEAiBf
+PIiHZ3z459HEs2964cTycduuOnkG27AuBQcDjbIwVQIgJDvyvjUOqXAhMx+V+URC
+Yuo1d2P6MbQE4kbZVaiNJMw=
+-----END CERTIFICATE-----

v3/testdata/smime/organization_validatged_with_no_country_specified.pem

@@ -0,0 +1,39 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 3 (0x3)
+        Signature Algorithm: ecdsa-with-SHA256
+        Issuer: 
+        Validity
+            Not Before: Sep  1 00:00:00 2023 GMT
+            Not After : Nov 30 00:00:00 9998 GMT
+        Subject: organizationIdentifier = NTRGB-12345678
+        Subject Public Key Info:
+            Public Key Algorithm: id-ecPublicKey
+                Public-Key: (256 bit)
+                pub:
+                    04:5a:3e:14:73:c8:68:32:d7:c0:d8:dc:c5:3e:bd:
+                    ca:ca:a9:4e:48:9b:8a:ec:6a:5a:9a:5c:c0:8a:af:
+                    e9:21:c4:d9:5f:b6:a7:d9:62:75:a5:5f:60:81:3a:
+                    90:cf:98:98:ae:25:8f:39:b5:4c:f9:ef:32:54:a7:
+                    a4:06:eb:ef:d8
+                ASN1 OID: prime256v1
+                NIST CURVE: P-256
+        X509v3 extensions:
+            X509v3 Certificate Policies: 
+                Policy: 2.23.140.1.5.2.1
+    Signature Algorithm: ecdsa-with-SHA256
+    Signature Value:
+        30:45:02:20:59:47:29:1a:67:67:67:c5:6f:2e:af:50:f5:09:
+        41:56:1c:76:b1:e8:85:1e:5e:84:ea:61:b4:d8:a0:87:f2:5c:
+        02:21:00:bf:6f:ce:d8:0d:0c:cc:32:19:d9:cc:60:65:47:65:
+        59:dd:87:99:3b:96:1d:76:b6:66:c3:10:e6:33:c8:2d:e3
+-----BEGIN CERTIFICATE-----
+MIIBITCByKADAgECAgEDMAoGCCqGSM49BAMCMAAwIBcNMjMwOTAxMDAwMDAwWhgP
+OTk5ODExMzAwMDAwMDBaMBkxFzAVBgNVBGETDk5UUkdCLTEyMzQ1Njc4MFkwEwYH
+KoZIzj0CAQYIKoZIzj0DAQcDQgAEWj4Uc8hoMtfA2NzFPr3KyqlOSJuK7GpamlzA
+iq/pIcTZX7an2WJ1pV9ggTqQz5iYriWPObVM+e8yVKekBuvv2KMYMBYwFAYDVR0g
+BA0wCzAJBgdngQwBBQIBMAoGCCqGSM49BAMCA0gAMEUCIFlHKRpnZ2fFby6vUPUJ
+QVYcdrHohR5ehOphtNigh/JcAiEAv2/O2A0MzDIZ2cxgZUdlWd2HmTuWHXa2ZsMQ
+5jPILeM=
+-----END CERTIFICATE-----