lwm2m - trust certificate, fix bug X509_TrustLwM2MIntegrationTest

application/src/test/java/org/thingsboard/server/transport/lwm2m/security/AbstractSecurityLwM2MIntegrationTest.java

@@ -161,7 +161,7 @@ public abstract class AbstractSecurityLwM2MIntegrationTest extends AbstractLwM2M
             rootCAX509Cert = (X509Certificate) serverKeyStore.getCertificate("rootCA");
             serverX509Cert = (X509Certificate) serverKeyStore.getCertificate("server");
             serverX509CertSelfSigned = (X509Certificate) serverKeyStore.getCertificate("server_self_signed");
-            trustedCertificates[0] = rootCAX509Cert;
+            trustedCertificates[0] = serverX509Cert;
         } catch (GeneralSecurityException | IOException e) {
             throw new RuntimeException(e);
         }

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/secure/TbLwM2MDtlsCertificateVerifier.java

@@ -144,7 +144,7 @@ public class TbLwM2MDtlsCertificateVerifier implements NewAdvancedCertificateVer
                             X509ClientCredential config = (X509ClientCredential) credentials.getClient();
                             String certBody = config.getCert();
                             String endpoint = config.getEndpoint();
-                            if (certBody.isEmpty() || strCert.equals(certBody)) {
+                            if (StringUtils.isBlank(certBody) || strCert.equals(certBody)) {
                                 x509CredentialsFound = true;
                                 DeviceProfile deviceProfile = msg.getDeviceProfile();
                                 if (msg.hasDeviceInfo() && deviceProfile != null) {