LDAP Provider: TLS support (#1137)

outpost/pkg/ldap/api_tls.go

@@ -0,0 +1,23 @@
+package ldap
+
+import "crypto/tls"
+
+func (ls *LDAPServer) getCertificates(info *tls.ClientHelloInfo) (*tls.Certificate, error) {
+	if len(ls.providers) == 1 {
+		if ls.providers[0].cert != nil {
+			ls.log.WithField("server-name", info.ServerName).Debug("We only have a single provider, using their cert")
+			return ls.providers[0].cert, nil
+		}
+	}
+	for _, provider := range ls.providers {
+		if provider.tlsServerName == &info.ServerName {
+			if provider.cert == nil {
+				ls.log.WithField("server-name", info.ServerName).Debug("Handler does not have a certificate")
+				return ls.defaultCert, nil
+			}
+			return provider.cert, nil
+		}
+	}
+	ls.log.WithField("server-name", info.ServerName).Debug("Fallback to default cert")
+	return ls.defaultCert, nil
+}