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pull/847/head
Herman Slatman 2 years ago
parent 9539729bd9
commit 6bc0513468
No known key found for this signature in database
GPG Key ID: F4D8A44EA0A75A4F
8 changed files with 1062 additions and 34 deletions
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1
authority/provisioner/acme.go
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@ -117,6 +117,7 @@ func (p *ACME) AuthorizeOrderIdentifier(ctx context.Context, identifier string)
return nil
}
// assuming only valid identifiers (IP or DNS) are provided
var err error
if ip := net.ParseIP(identifier); ip != nil {
_, err = p.x509PolicyEngine.IsIPAllowed(ip)

12
authority/provisioner/jwk.go
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@ -158,6 +158,7 @@ func (p *JWK) authorizeToken(token string, audiences []string) (*jwtPayload, err
// revoke the certificate with serial number in the `sub` property.
func (p *JWK) AuthorizeRevoke(ctx context.Context, token string) error {
_, err := p.authorizeToken(token, p.audiences.Revoke)
// TODO(hs): authorize the SANs using x509 name policy allow/deny rules (also for other provisioners with AuthorizeRevoke)
return errs.Wrap(http.StatusInternalServerError, err, "jwk.AuthorizeRevoke")
}
@ -208,9 +209,19 @@ func (p *JWK) AuthorizeRenew(ctx context.Context, cert *x509.Certificate) error
if p.claimer.IsDisableRenewal() {
return errs.Unauthorized("jwk.AuthorizeRenew; renew is disabled for jwk provisioner '%s'", p.GetName())
}
// TODO(hs): authorize the SANs using x509 name policy allow/deny rules (also for other provisioners with AuthorizeRewew and AuthorizeSSHRenew)
//return p.authorizeRenew(cert)
return nil
}
// func (p *JWK) authorizeRenew(cert *x509.Certificate) error {
// if p.x509PolicyEngine == nil {
// return nil
// }
// _, err := p.x509PolicyEngine.AreCertificateNamesAllowed(cert)
// return err
// }
// AuthorizeSSHSign returns the list of SignOption for a SignSSH request.
func (p *JWK) AuthorizeSSHSign(ctx context.Context, token string) ([]SignOption, error) {
if !p.claimer.IsSSHCAEnabled() {
@ -288,5 +299,6 @@ func (p *JWK) AuthorizeSSHSign(ctx context.Context, token string) ([]SignOption,
// AuthorizeSSHRevoke returns nil if the token is valid, false otherwise.
func (p *JWK) AuthorizeSSHRevoke(ctx context.Context, token string) error {
_, err := p.authorizeToken(token, p.audiences.SSHRevoke)
// TODO(hs): authorize the principals using SSH name policy allow/deny rules (also for other provisioners with AuthorizeSSHRevoke)
return errs.Wrap(http.StatusInternalServerError, err, "jwk.AuthorizeSSHRevoke")
}

4
authority/provisioner/policy.go
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@ -12,7 +12,9 @@ func newX509PolicyEngine(x509Opts *X509Options) (*x509policy.NamePolicyEngine, e
return nil, nil
}
options := []x509policy.NamePolicyOption{}
options := []x509policy.NamePolicyOption{
x509policy.WithEnableSubjectCommonNameVerification(), // enable x509 Subject Common Name validation by default
}
allowed := x509Opts.GetAllowedNameOptions()
if allowed != nil && allowed.HasNames() {

2
policy/ssh/ssh.go
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@ -80,7 +80,7 @@ func (e *NamePolicyEngine) validateNames(dnsNames, emails, userNames []string) e
/* No regexes for now. But if we ever implement them, they'd probably look like this */
/*"principal": ["foo.smallstep.com", "/^*\.smallstep\.com$/"]*/
// Principals can be single user names (mariano, max, mike, ...), hostnames/domains (*.smallstep.com, host.smallstep.com, ...) and emails (max@smallstep.com, @smallstep.com, ...)
// Principals can be single user names (mariano, max, mike, ...), hostnames/domains (*.smallstep.com, host.smallstep.com, ...) and "emails" (max@smallstep.com, @smallstep.com, ...)
// All ValidPrincipals can thus be any one of those, and they can be mixed (mike@smallstep.com, mike, ...); we need to split this?
// Should we assume a generic engine, or can we do it host vs. user based? If host vs. user based, then it becomes easier w.r.t. dns; hosts will only be DNS, right?
// If we assume generic, we _may_ have a harder time distinguishing host vs. user certs. We propose to use host + user specific provisioners, though...

261
policy/ssh/ssh_test.go
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@ -0,0 +1,261 @@
package sshpolicy
import (
"testing"
"golang.org/x/crypto/ssh"
)
func TestNamePolicyEngine_ArePrincipalsAllowed(t *testing.T) {
type fields struct {
options []NamePolicyOption
permittedDNSDomains []string
excludedDNSDomains []string
permittedEmailAddresses []string
excludedEmailAddresses []string
permittedPrincipals []string
excludedPrincipals []string
}
tests := []struct {
name string
fields fields
cert *ssh.Certificate
want bool
wantErr bool
}{
{
name: "fail/dns-permitted",
fields: fields{
permittedDNSDomains: []string{".local"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{"host.notlocal"},
},
want: false,
wantErr: true,
},
{
name: "fail/dns-permitted",
fields: fields{
excludedDNSDomains: []string{".local"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{"host.local"},
},
want: false,
wantErr: true,
},
{
name: "fail/mail-permitted",
fields: fields{
permittedEmailAddresses: []string{"example.local"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{"user@example.notlocal"},
},
want: false,
wantErr: true,
},
{
name: "fail/mail-excluded",
fields: fields{
excludedEmailAddresses: []string{"example.local"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{"user@example.local"},
},
want: false,
wantErr: true,
},
{
name: "fail/principal-permitted",
fields: fields{
permittedPrincipals: []string{"user1"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{"user2"},
},
want: false,
wantErr: true,
},
{
name: "fail/principal-excluded",
fields: fields{
excludedPrincipals: []string{"user"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{"user"},
},
want: false,
wantErr: true,
},
{
name: "fail/combined-complex-all-badhost.local",
fields: fields{
permittedDNSDomains: []string{".local"},
permittedEmailAddresses: []string{"example.local"},
permittedPrincipals: []string{"user"},
excludedDNSDomains: []string{"badhost.local"},
excludedEmailAddresses: []string{"badmail@example.local"},
excludedPrincipals: []string{"baduser"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{
"user",
"user@example.local",
"badhost.local",
},
},
want: false,
wantErr: true,
},
{
name: "ok/no-constraints",
fields: fields{},
cert: &ssh.Certificate{
ValidPrincipals: []string{"host.example.com"},
},
want: true,
wantErr: false,
},
{
name: "ok/dns-permitted",
fields: fields{
permittedDNSDomains: []string{".local"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{"example.local"},
},
want: true,
wantErr: false,
},
{
name: "ok/dns-excluded",
fields: fields{
excludedDNSDomains: []string{".notlocal"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{"example.local"},
},
want: true,
wantErr: false,
},
{
name: "ok/mail-permitted",
fields: fields{
permittedEmailAddresses: []string{"example.local"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{"user@example.local"},
},
want: true,
wantErr: false,
},
{
name: "ok/mail-excluded",
fields: fields{
excludedEmailAddresses: []string{"example.notlocal"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{"user@example.local"},
},
want: true,
wantErr: false,
},
{
name: "ok/principal-permitted",
fields: fields{
permittedPrincipals: []string{"user"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{"user"},
},
want: true,
wantErr: false,
},
{
name: "ok/principal-excluded",
fields: fields{
excludedPrincipals: []string{"someone"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{"user"},
},
want: true,
wantErr: false,
},
{
name: "ok/combined-simple-user-permitted",
fields: fields{
permittedEmailAddresses: []string{"example.local"},
permittedPrincipals: []string{"user"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{
"user",
"user@example.local",
},
},
want: true,
wantErr: false,
},
{
name: "ok/combined-simple-all-permitted",
fields: fields{
permittedDNSDomains: []string{".local"},
permittedEmailAddresses: []string{"example.local"},
permittedPrincipals: []string{"user"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{
"user",
"user@example.local",
"host.local",
},
},
want: true,
wantErr: false,
},
{
name: "ok/combined-complex-all",
fields: fields{
permittedDNSDomains: []string{".local"},
permittedEmailAddresses: []string{"example.local"},
permittedPrincipals: []string{"user"},
excludedDNSDomains: []string{"badhost.local"},
excludedEmailAddresses: []string{"badmail@example.local"},
excludedPrincipals: []string{"baduser"},
},
cert: &ssh.Certificate{
ValidPrincipals: []string{
"user",
"user@example.local",
"host.local",
},
},
want: true,
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
e := &NamePolicyEngine{
options: tt.fields.options,
permittedDNSDomains: tt.fields.permittedDNSDomains,
excludedDNSDomains: tt.fields.excludedDNSDomains,
permittedEmailAddresses: tt.fields.permittedEmailAddresses,
excludedEmailAddresses: tt.fields.excludedEmailAddresses,
permittedPrincipals: tt.fields.permittedPrincipals,
excludedPrincipals: tt.fields.excludedPrincipals,
}
got, err := e.ArePrincipalsAllowed(tt.cert)
if (err != nil) != tt.wantErr {
t.Errorf("NamePolicyEngine.ArePrincipalsAllowed() error = %v, wantErr %v", err, tt.wantErr)
return
}
if got != tt.want {
t.Errorf("NamePolicyEngine.ArePrincipalsAllowed() = %v, want %v", got, tt.want)
}
})
}
}

7
policy/x509/options.go
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@ -12,6 +12,13 @@ type NamePolicyOption func(e *NamePolicyEngine) error
// TODO: wrap (more) errors; and prove a set of known (exported) errors
func WithEnableSubjectCommonNameVerification() NamePolicyOption {
return func(e *NamePolicyEngine) error {
e.verifySubjectCommonName = true
return nil
}
}
func WithPermittedDNSDomains(domains []string) NamePolicyOption {
return func(e *NamePolicyEngine) error {
for _, domain := range domains {

40
policy/x509/x509.go
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@ -3,6 +3,7 @@ package x509policy
import (
"bytes"
"crypto/x509"
"crypto/x509/pkix"
"fmt"
"net"
"net/url"
@ -50,6 +51,7 @@ func (e CertificateInvalidError) Error() string {
// TODO(hs): implement Stringer interface: describe the contents of the NamePolicyEngine?
type NamePolicyEngine struct {
options []NamePolicyOption
verifySubjectCommonName bool
permittedDNSDomains []string
excludedDNSDomains []string
permittedIPRanges []*net.IPNet
@ -76,7 +78,13 @@ func New(opts ...NamePolicyOption) (*NamePolicyEngine, error) {
// AreCertificateNamesAllowed verifies that all SANs in a Certificate are allowed.
func (e *NamePolicyEngine) AreCertificateNamesAllowed(cert *x509.Certificate) (bool, error) {
if err := e.validateNames(cert.DNSNames, cert.IPAddresses, cert.EmailAddresses, cert.URIs); err != nil {
dnsNames, ips, emails, uris := cert.DNSNames, cert.IPAddresses, cert.EmailAddresses, cert.URIs
// when Subject Common Name must be verified in addition to the SANs, it is
// added to the appropriate slice of names.
if e.verifySubjectCommonName {
appendSubjectCommonName(cert.Subject, &dnsNames, &ips, &emails, &uris)
}
if err := e.validateNames(dnsNames, ips, emails, uris); err != nil {
return false, err
}
return true, nil
@ -84,7 +92,13 @@ func (e *NamePolicyEngine) AreCertificateNamesAllowed(cert *x509.Certificate) (b
// AreCSRNamesAllowed verifies that all names in the CSR are allowed.
func (e *NamePolicyEngine) AreCSRNamesAllowed(csr *x509.CertificateRequest) (bool, error) {
if err := e.validateNames(csr.DNSNames, csr.IPAddresses, csr.EmailAddresses, csr.URIs); err != nil {
dnsNames, ips, emails, uris := csr.DNSNames, csr.IPAddresses, csr.EmailAddresses, csr.URIs
// when Subject Common Name must be verified in addition to the SANs, it is
// added to the appropriate slice of names.
if e.verifySubjectCommonName {
appendSubjectCommonName(csr.Subject, &dnsNames, &ips, &emails, &uris)
}
if err := e.validateNames(dnsNames, ips, emails, uris); err != nil {
return false, err
}
return true, nil
@ -116,6 +130,26 @@ func (e *NamePolicyEngine) IsIPAllowed(ip net.IP) (bool, error) {
return true, nil
}
// appendSubjectCommonName appends the Subject Common Name to the appropriate slice of names. The logic is
// similar as x509util.SplitSANs: if the subject can be parsed as an IP, it's added to the ips. If it can
// be parsed as an URL, it is added to the URIs. If it contains an @, it is added to emails. When it's none
// of these, it's added to the DNS names.
func appendSubjectCommonName(subject pkix.Name, dnsNames *[]string, ips *[]net.IP, emails *[]string, uris *[]*url.URL) {
commonName := subject.CommonName
if commonName == "" {
return
}
if ip := net.ParseIP(commonName); ip != nil {
*ips = append(*ips, ip)
} else if u, err := url.Parse(commonName); err == nil && u.Scheme != "" {
*uris = append(*uris, u)
} else if strings.Contains(commonName, "@") {
*emails = append(*emails, commonName)
} else {
*dnsNames = append(*dnsNames, commonName)
}
}
// validateNames verifies that all names are allowed.
// Its logic follows that of (a large part of) the (c *Certificate) isValid() function
// in https://cs.opensource.google/go/go/+/refs/tags/go1.17.5:src/crypto/x509/verify.go
@ -508,7 +542,7 @@ func matchIPConstraint(ip net.IP, constraint *net.IPNet) (bool, error) {
// return false, nil
// }
contained := constraint.Contains(ip) // TODO(hs): validate that this is the correct behavior.
contained := constraint.Contains(ip) // TODO(hs): validate that this is the correct behavior; also check IPv4-in-IPv6 (again)
return contained, nil
}

769
policy/x509/x509_test.go
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@ -2,6 +2,7 @@ package x509policy
import (
"crypto/x509"
"crypto/x509/pkix"
"net"
"net/url"
"testing"
@ -9,8 +10,11 @@ import (
"github.com/smallstep/assert"
)
func TestGuard_IsAllowed(t *testing.T) {
func TestNamePolicyEngine_AreCertificateNamesAllowed(t *testing.T) {
// TODO(hs): refactor these tests into using validateNames instead of AreCertificateNamesAllowed
// TODO(hs): the functionality in the policy engine is a nice candidate for trying fuzzing on
type fields struct {
verifySubjectCommonName bool
permittedDNSDomains []string
excludedDNSDomains []string
permittedIPRanges []*net.IPNet
@ -23,7 +27,7 @@ func TestGuard_IsAllowed(t *testing.T) {
tests := []struct {
name string
fields fields
csr *x509.CertificateRequest
cert *x509.Certificate
want bool
wantErr bool
}{
@ -32,23 +36,67 @@ func TestGuard_IsAllowed(t *testing.T) {
fields: fields{
permittedDNSDomains: []string{".local"},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
DNSNames: []string{"www.example.com"},
},
want: false,
wantErr: true,
},
{
name: "fail/dns-permitted-single-host",
fields: fields{
permittedDNSDomains: []string{"host.local"},
},
cert: &x509.Certificate{
DNSNames: []string{"differenthost.local"},
},
want: false,
wantErr: true,
},
{
name: "fail/dns-permitted-no-label",
fields: fields{
permittedDNSDomains: []string{".local"},
},
cert: &x509.Certificate{
DNSNames: []string{"local"},
},
want: false,
wantErr: true,
},
{
name: "fail/dns-permitted-empty-label",
fields: fields{
permittedDNSDomains: []string{".local"},
},
cert: &x509.Certificate{
DNSNames: []string{"www..local"},
},
want: false,
wantErr: true,
},
{
name: "fail/dns-excluded",
fields: fields{
excludedDNSDomains: []string{"example.com"},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
DNSNames: []string{"www.example.com"},
},
want: false,
wantErr: true,
},
{
name: "fail/dns-excluded-single-host",
fields: fields{
excludedDNSDomains: []string{"example.com"},
},
cert: &x509.Certificate{
DNSNames: []string{"example.com"},
},
want: false,
wantErr: true,
},
{
name: "fail/ipv4-permitted",
fields: fields{
@ -59,7 +107,7 @@ func TestGuard_IsAllowed(t *testing.T) {
},
},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
IPAddresses: []net.IP{net.ParseIP("1.1.1.1")},
},
want: false,
@ -75,7 +123,7 @@ func TestGuard_IsAllowed(t *testing.T) {
},
},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
IPAddresses: []net.IP{net.ParseIP("127.0.0.1")},
},
want: false,
@ -91,7 +139,7 @@ func TestGuard_IsAllowed(t *testing.T) {
},
},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
IPAddresses: []net.IP{net.ParseIP("3001:0db8:85a3:0000:0000:8a2e:0370:7334")},
},
want: false,
@ -107,7 +155,7 @@ func TestGuard_IsAllowed(t *testing.T) {
},
},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
IPAddresses: []net.IP{net.ParseIP("2001:0db8:85a3:0000:0000:8a2e:0370:7334")},
},
want: false,
@ -118,18 +166,29 @@ func TestGuard_IsAllowed(t *testing.T) {
fields: fields{
permittedEmailAddresses: []string{"example.local"},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
EmailAddresses: []string{"mail@example.com"},
},
want: false,
wantErr: true,
},
{
name: "fail/mail-permitted-period-domain",
fields: fields{
permittedEmailAddresses: []string{".example.local"}, // any address in a domain, but not on the host example.local
},
cert: &x509.Certificate{
EmailAddresses: []string{"mail@example.local"},
},
want: false,
wantErr: true,
},
{
name: "fail/mail-excluded",
fields: fields{
excludedEmailAddresses: []string{"example.local"},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
EmailAddresses: []string{"mail@example.local"},
},
want: false,
@ -140,7 +199,7 @@ func TestGuard_IsAllowed(t *testing.T) {
fields: fields{
permittedURIDomains: []string{".example.com"},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
URIs: []*url.URL{
{
Scheme: "https",
@ -151,12 +210,282 @@ func TestGuard_IsAllowed(t *testing.T) {
want: false,
wantErr: true,
},
{
name: "fail/uri-permitted-period-host",
fields: fields{
permittedURIDomains: []string{".example.local"},
},
cert: &x509.Certificate{
URIs: []*url.URL{
{
Scheme: "https",
Host: "example.local",
},
},
},
want: false,
wantErr: true,
},
{
name: "fail/uri-permitted-period-host-certificate",
fields: fields{
permittedURIDomains: []string{".example.local"},
},
cert: &x509.Certificate{
URIs: []*url.URL{
{
Scheme: "https",
Host: ".example.local",
},
},
},
want: false,
wantErr: true,
},
{
name: "fail/uri-permitted-empty-host",
fields: fields{
permittedURIDomains: []string{".example.com"},
},
cert: &x509.Certificate{
URIs: []*url.URL{
{
Scheme: "https",
Host: "",
},
},
},
want: false,
wantErr: true,
},
{
name: "fail/uri-permitted-port-missing",
fields: fields{
permittedURIDomains: []string{".example.com"},
},
cert: &x509.Certificate{
URIs: []*url.URL{
{
Scheme: "https",
Host: "example.local::",
},
},
},
want: false,
wantErr: true,
},
{
name: "fail/uri-permitted-ip",
fields: fields{
permittedURIDomains: []string{".example.com"},
},
cert: &x509.Certificate{
URIs: []*url.URL{
{
Scheme: "https",
Host: "127.0.0.1",
},
},
},
want: false,
wantErr: true,
},
{
name: "fail/uri-excluded",
fields: fields{
excludedURIDomains: []string{".example.local"},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
URIs: []*url.URL{
{
Scheme: "https",
Host: "www.example.local",
},
},
},
want: false,
wantErr: true,
},
{
name: "fail/subject-dns-permitted",
fields: fields{
verifySubjectCommonName: true,
permittedDNSDomains: []string{".local"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "example.notlocal",
},
},
want: false,
wantErr: true,
},
{
name: "fail/subject-dns-excluded",
fields: fields{
verifySubjectCommonName: true,
excludedDNSDomains: []string{".local"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "example.local",
},
},
want: false,
wantErr: true,
},
{
name: "fail/subject-ipv4-permitted",
fields: fields{
verifySubjectCommonName: true,
permittedIPRanges: []*net.IPNet{
{
IP: net.ParseIP("127.0.0.1"),
Mask: net.IPv4Mask(255, 255, 255, 0),
},
},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "10.10.10.10",
},
},
want: false,
wantErr: true,
},
{
name: "fail/subject-ipv4-excluded",
fields: fields{
verifySubjectCommonName: true,
excludedIPRanges: []*net.IPNet{
{
IP: net.ParseIP("127.0.0.1"),
Mask: net.IPv4Mask(255, 255, 255, 0),
},
},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "127.0.0.1",
},
},
want: false,
wantErr: true,
},
{
name: "fail/subject-ipv6-permitted",
fields: fields{
verifySubjectCommonName: true,
permittedIPRanges: []*net.IPNet{
{
IP: net.ParseIP("2001:0db8:85a3:0000:0000:8a2e:0370:7334"),
Mask: net.CIDRMask(120, 128),
},
},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "2002:0db8:85a3:0000:0000:8a2e:0370:7339",
},
},
want: false,
wantErr: true,
},
{
name: "fail/subject-ipv6-excluded",
fields: fields{
verifySubjectCommonName: true,
excludedIPRanges: []*net.IPNet{
{
IP: net.ParseIP("2001:0db8:85a3:0000:0000:8a2e:0370:7334"),
Mask: net.CIDRMask(120, 128),
},
},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "2001:0db8:85a3:0000:0000:8a2e:0370:7339",
},
},
want: false,
wantErr: true,
},
{
name: "fail/subject-email-permitted",
fields: fields{
verifySubjectCommonName: true,
permittedEmailAddresses: []string{"example.local"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "mail@smallstep.com",
},
},
want: false,
wantErr: true,
},
{
name: "fail/subject-email-excluded",
fields: fields{
verifySubjectCommonName: true,
excludedEmailAddresses: []string{"example.local"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "mail@example.local",
},
},
want: false,
wantErr: true,
},
{
name: "fail/subject-uri-permitted",
fields: fields{
verifySubjectCommonName: true,
permittedURIDomains: []string{".example.com"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "https://www.google.com",
},
},
want: false,
wantErr: true,
},
{
name: "fail/subject-uri-excluded",
fields: fields{
verifySubjectCommonName: true,
excludedURIDomains: []string{".example.com"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "https://www.example.com",
},
},
want: false,
wantErr: true,
},
{
name: "fail/combined-simple-all-badhost.local",
fields: fields{
verifySubjectCommonName: true,
permittedDNSDomains: []string{".local"},
permittedIPRanges: []*net.IPNet{{IP: net.ParseIP("127.0.0.1"), Mask: net.IPv4Mask(255, 255, 255, 0)}},
permittedEmailAddresses: []string{"example.local"},
permittedURIDomains: []string{".example.local"},
excludedDNSDomains: []string{"badhost.local"},
excludedIPRanges: []*net.IPNet{{IP: net.ParseIP("1.1.1.1"), Mask: net.IPv4Mask(255, 255, 255, 0)}},
excludedEmailAddresses: []string{"badmail@example.local"},
excludedURIDomains: []string{"https://badwww.example.local"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "badhost.local",
},
DNSNames: []string{"example.local"},
IPAddresses: []net.IP{net.ParseIP("127.0.0.130")},
EmailAddresses: []string{"mail@example.local"},
URIs: []*url.URL{
{
Scheme: "https",
@ -170,25 +499,47 @@ func TestGuard_IsAllowed(t *testing.T) {
{
name: "ok/no-constraints",
fields: fields{},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
DNSNames: []string{"www.example.com"},
},
want: true,
wantErr: false,
},
{
name: "ok/dns",
name: "ok/empty-dns-constraint",
fields: fields{
permittedDNSDomains: []string{""},
},
cert: &x509.Certificate{
DNSNames: []string{"example.local"},
},
want: true,
wantErr: false,
},
{
name: "ok/dns-permitted",
fields: fields{
permittedDNSDomains: []string{".local"},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
DNSNames: []string{"example.local"},
},
want: true,
wantErr: false,
},
{
name: "ok/ipv4",
name: "ok/dns-excluded",
fields: fields{
excludedDNSDomains: []string{".notlocal"},
},
cert: &x509.Certificate{
DNSNames: []string{"example.local"},
},
want: true,
wantErr: false,
},
{
name: "ok/ipv4-permitted",
fields: fields{
permittedIPRanges: []*net.IPNet{
{
@ -197,14 +548,30 @@ func TestGuard_IsAllowed(t *testing.T) {
},
},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
IPAddresses: []net.IP{net.ParseIP("127.0.0.20")},
},
want: true,
wantErr: false,
},
{
name: "ok/ipv6",
name: "ok/ipv4-excluded",
fields: fields{
excludedIPRanges: []*net.IPNet{
{
IP: net.ParseIP("127.0.0.1"),
Mask: net.IPv4Mask(255, 255, 255, 0),
},
},
},
cert: &x509.Certificate{
IPAddresses: []net.IP{net.ParseIP("10.10.10.10")},
},
want: true,
wantErr: false,
},
{
name: "ok/ipv6-permitted",
fields: fields{
permittedIPRanges: []*net.IPNet{
{
@ -213,29 +580,89 @@ func TestGuard_IsAllowed(t *testing.T) {
},
},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
IPAddresses: []net.IP{net.ParseIP("2001:0db8:85a3:0000:0000:8a2e:0370:7339")},
},
want: true,
wantErr: false,
},
{
name: "ok/mail",
name: "ok/ipv6-excluded",
fields: fields{
excludedIPRanges: []*net.IPNet{
{
IP: net.ParseIP("2001:0db8:85a3:0000:0000:8a2e:0370:7334"),
Mask: net.CIDRMask(120, 128),
},
},
},
cert: &x509.Certificate{
IPAddresses: []net.IP{net.ParseIP("2003:0db8:85a3:0000:0000:8a2e:0370:7334")},
},
want: true,
wantErr: false,
},
{
name: "ok/mail-permitted",
fields: fields{
permittedEmailAddresses: []string{"example.local"},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
EmailAddresses: []string{"mail@example.local"},
},
want: true,
wantErr: false,
},
{
name: "ok/mail-permitted-with-period-domain",
fields: fields{
permittedEmailAddresses: []string{".example.local"},
},
cert: &x509.Certificate{
EmailAddresses: []string{"mail@somehost.example.local"},
},
want: true,
wantErr: false,
},
{
name: "ok/mail-permitted-with-multiple-labels",
fields: fields{
permittedEmailAddresses: []string{".example.local"},
},
cert: &x509.Certificate{
EmailAddresses: []string{"mail@sub.www.example.local"},
},
want: true,
wantErr: false,
},
{
name: "ok/mail-excluded",
fields: fields{
excludedEmailAddresses: []string{"example.notlocal"},
},
cert: &x509.Certificate{
EmailAddresses: []string{"mail@example.local"},
},
want: true,
wantErr: false,
},
{
name: "ok/uri",
name: "ok/mail-excluded-with-period-domain",
fields: fields{
excludedEmailAddresses: []string{".example.notlocal"},
},
cert: &x509.Certificate{
EmailAddresses: []string{"mail@somehost.example.local"},
},
want: true,
wantErr: false,
},
{
name: "ok/uri-permitted",
fields: fields{
permittedURIDomains: []string{".example.com"},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
URIs: []*url.URL{
{
Scheme: "https",
@ -247,14 +674,297 @@ func TestGuard_IsAllowed(t *testing.T) {
wantErr: false,
},
{
name: "ok/combined-simple",
name: "ok/uri-permitted-with-port",
fields: fields{
permittedURIDomains: []string{".example.com"},
},
cert: &x509.Certificate{
URIs: []*url.URL{
{
Scheme: "https",
Host: "www.example.com:8080",
},
},
},
want: true,
wantErr: false,
},
{
name: "ok/uri-sub-permitted",
fields: fields{
permittedURIDomains: []string{"example.com"},
},
cert: &x509.Certificate{
URIs: []*url.URL{
{
Scheme: "https",
Host: "sub.host.example.com",
},
},
},
want: true,
wantErr: false,
},
{
name: "ok/uri-excluded",
fields: fields{
excludedURIDomains: []string{".google.com"},
},
cert: &x509.Certificate{
URIs: []*url.URL{
{
Scheme: "https",
Host: "www.example.com",
},
},
},
want: true,
wantErr: false,
},
{
name: "ok/subject-empty",
fields: fields{
verifySubjectCommonName: true,
permittedDNSDomains: []string{".local"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "",
},
DNSNames: []string{"example.local"},
},
want: true,
wantErr: false,
},
{
name: "ok/subject-dns-permitted",
fields: fields{
verifySubjectCommonName: true,
permittedDNSDomains: []string{".local"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "example.local",
},
},
want: true,
wantErr: false,
},
{
name: "ok/subject-dns-excluded",
fields: fields{
verifySubjectCommonName: true,
excludedDNSDomains: []string{".notlocal"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "example.local",
},
},
want: true,
wantErr: false,
},
{
name: "ok/subject-ipv4-permitted",
fields: fields{
verifySubjectCommonName: true,
permittedIPRanges: []*net.IPNet{
{
IP: net.ParseIP("127.0.0.1"),
Mask: net.IPv4Mask(255, 255, 255, 0),
},
},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "127.0.0.20",
},
},
want: true,
wantErr: false,
},
{
name: "ok/subject-ipv4-excluded",
fields: fields{
verifySubjectCommonName: true,
excludedIPRanges: []*net.IPNet{
{
IP: net.ParseIP("128.0.0.1"),
Mask: net.IPv4Mask(255, 255, 255, 0),
},
},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "127.0.0.1",
},
},
want: true,
wantErr: false,
},
{
name: "ok/subject-ipv6-permitted",
fields: fields{
verifySubjectCommonName: true,
permittedIPRanges: []*net.IPNet{
{
IP: net.ParseIP("2001:0db8:85a3:0000:0000:8a2e:0370:7334"),
Mask: net.CIDRMask(120, 128),
},
},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "2001:0db8:85a3:0000:0000:8a2e:0370:7339",
},
},
want: true,
wantErr: false,
},
{
name: "ok/subject-ipv6-excluded",
fields: fields{
verifySubjectCommonName: true,
excludedIPRanges: []*net.IPNet{
{
IP: net.ParseIP("2001:0db8:85a3:0000:0000:8a2e:0370:7334"),
Mask: net.CIDRMask(120, 128),
},
},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "2009:0db8:85a3:0000:0000:8a2e:0370:7339",
},
},
want: true,
wantErr: false,
},
{
name: "ok/subject-email-permitted",
fields: fields{
verifySubjectCommonName: true,
permittedEmailAddresses: []string{"example.local"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "mail@example.local",
},
},
want: true,
wantErr: false,
},
{
name: "ok/subject-email-excluded",
fields: fields{
verifySubjectCommonName: true,
excludedEmailAddresses: []string{"example.notlocal"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "mail@example.local",
},
},
want: true,
wantErr: false,
},
{
name: "ok/subject-uri-permitted",
fields: fields{
verifySubjectCommonName: true,
permittedURIDomains: []string{".example.com"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "https://www.example.com",
},
},
want: true,
wantErr: false,
},
{
name: "ok/subject-uri-excluded",
fields: fields{
verifySubjectCommonName: true,
excludedURIDomains: []string{".google.com"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "https://www.example.com",
},
},
want: true,
wantErr: false,
},
{
name: "ok/combined-simple-permitted",
fields: fields{
verifySubjectCommonName: true,
permittedDNSDomains: []string{".local"},
permittedIPRanges: []*net.IPNet{{IP: net.ParseIP("127.0.0.1"), Mask: net.IPv4Mask(255, 255, 255, 0)}},
permittedEmailAddresses: []string{"example.local"},
permittedURIDomains: []string{".example.local"},
},
csr: &x509.CertificateRequest{
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "somehost.local",
},
DNSNames: []string{"example.local"},
IPAddresses: []net.IP{net.ParseIP("127.0.0.1")},
EmailAddresses: []string{"mail@example.local"},
URIs: []*url.URL{
{
Scheme: "https",
Host: "www.example.local",
},
},
},
want: true,
wantErr: false,
},
{
name: "ok/combined-simple-permitted-without-subject-verification",
fields: fields{
verifySubjectCommonName: false,
permittedDNSDomains: []string{".local"},
permittedIPRanges: []*net.IPNet{{IP: net.ParseIP("127.0.0.1"), Mask: net.IPv4Mask(255, 255, 255, 0)}},
permittedEmailAddresses: []string{"example.local"},
permittedURIDomains: []string{".example.local"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "forbidden-but-non-verified-domain.example.com",
},
DNSNames: []string{"example.local"},
IPAddresses: []net.IP{net.ParseIP("127.0.0.1")},
EmailAddresses: []string{"mail@example.local"},
URIs: []*url.URL{
{
Scheme: "https",
Host: "www.example.local",
},
},
},
want: true,
wantErr: false,
},
{
name: "ok/combined-simple-all",
fields: fields{
verifySubjectCommonName: true,
permittedDNSDomains: []string{".local"},
permittedIPRanges: []*net.IPNet{{IP: net.ParseIP("127.0.0.1"), Mask: net.IPv4Mask(255, 255, 255, 0)}},
permittedEmailAddresses: []string{"example.local"},
permittedURIDomains: []string{".example.local"},
excludedDNSDomains: []string{"badhost.local"},
excludedIPRanges: []*net.IPNet{{IP: net.ParseIP("127.0.0.128"), Mask: net.IPv4Mask(255, 255, 255, 128)}},
excludedEmailAddresses: []string{"badmail@example.local"},
excludedURIDomains: []string{"https://badwww.example.local"},
},
cert: &x509.Certificate{
Subject: pkix.Name{
CommonName: "somehost.local",
},
DNSNames: []string{"example.local"},
IPAddresses: []net.IP{net.ParseIP("127.0.0.1")},
EmailAddresses: []string{"mail@example.local"},
@ -268,12 +978,13 @@ func TestGuard_IsAllowed(t *testing.T) {
want: true,
wantErr: false,
},
// TODO: more complex uses cases that combine multiple names
// TODO: more complex uses cases that combine multiple names and permitted/excluded entries
// TODO: check errors (reasons) are as expected
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
g := &NamePolicyEngine{
verifySubjectCommonName: tt.fields.verifySubjectCommonName,
permittedDNSDomains: tt.fields.permittedDNSDomains,
excludedDNSDomains: tt.fields.excludedDNSDomains,
permittedIPRanges: tt.fields.permittedIPRanges,
@ -283,16 +994,16 @@ func TestGuard_IsAllowed(t *testing.T) {
permittedURIDomains: tt.fields.permittedURIDomains,
excludedURIDomains: tt.fields.excludedURIDomains,
}
got, err := g.AreCSRNamesAllowed(tt.csr)
got, err := g.AreCertificateNamesAllowed(tt.cert)
if (err != nil) != tt.wantErr {
t.Errorf("Guard.IsAllowed() error = %v, wantErr %v", err, tt.wantErr)
t.Errorf("NamePolicyEngine.AreCertificateNamesAllowed() error = %v, wantErr %v", err, tt.wantErr)
return
}
if err != nil {
assert.NotEquals(t, "", err.Error()) // TODO(hs): make this a complete equality check
}
if got != tt.want {
t.Errorf("Guard.IsAllowed() = %v, want %v", got, tt.want)
t.Errorf("NamePolicyEngine.AreCertificateNamesAllowed() = %v, want %v", got, tt.want)
}
})
}

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