implement certificate posture check

shared/management/networkmap/nmdata/peer.go

@@ -47,6 +47,7 @@ type PeerSystemMeta struct {
 	KernelVersion      string
 	NetworkAddresses   []NetworkAddress
 	Files              []File
+	Certificates       []string
 	Capabilities       []int32
 	Flags              Flags
 	SyncMessageVersion int

shared/management/networkmap/nmdata/posture.go

@@ -18,6 +18,7 @@ type ChecksDefinition struct {
 	GeoLocationCheck      *GeoLocationCheck
 	PeerNetworkRangeCheck *PeerNetworkRangeCheck
 	ProcessCheck          *ProcessCheck
+	CertificateCheck      *CertificateCheck
 }
 
 // Check is the slim twin of posture.Check. It is sealed: only the check types
@@ -79,5 +80,8 @@ func (pc *PostureChecks) GetChecks() []Check {
 	if pc.Checks.ProcessCheck != nil {
 		checks = append(checks, pc.Checks.ProcessCheck)
 	}
+	if pc.Checks.CertificateCheck != nil {
+		checks = append(checks, pc.Checks.CertificateCheck)
+	}
 	return checks
 }

shared/management/networkmap/nmdata/posture_certificate.go

@@ -0,0 +1,16 @@
+package nmdata
+
+import (
+	"time"
+
+	"github.com/netbirdio/netbird/shared/management/certposture"
+)
+
+// CertificateCheck is the slim twin of posture.CertificateCheck.
+type CertificateCheck struct {
+	CACertificates []string
+}
+
+func (c *CertificateCheck) check(peer *Peer) (bool, error) {
+	return certposture.AnyChainMatchesCAs(peer.Meta.Certificates, c.CACertificates, time.Now()), nil
+}

shared/management/networkmap/nmdata/posture_certificate_test.go

@@ -0,0 +1,28 @@
+package nmdata
+
+import (
+	"crypto/x509"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/netbirdio/netbird/shared/management/certposture"
+	"github.com/netbirdio/netbird/shared/management/certposture/certtest"
+)
+
+func TestCertificateCheck_Check(t *testing.T) {
+	ca := certtest.NewCA(t, "corp-root")
+	otherCA := certtest.NewCA(t, "other-root")
+	chain := certposture.EncodeChainPEM([]*x509.Certificate{ca.Issue(t, certtest.ECDSAKey(t), "device")})
+
+	c := bundle(ChecksDefinition{CertificateCheck: &CertificateCheck{CACertificates: []string{ca.PEM}}})
+	without := &Peer{}
+	with := &Peer{Meta: PeerSystemMeta{Certificates: []string{chain}}}
+
+	assert.False(t, c[0].Passes(without))
+	assert.True(t, c[0].Passes(with))
+	assert.True(t, PostureVerdictChanged(c, without, with))
+
+	otherOnly := bundle(ChecksDefinition{CertificateCheck: &CertificateCheck{CACertificates: []string{otherCA.PEM}}})
+	assert.False(t, otherOnly[0].Passes(with))
+}