Merge pull request 'Sync OTP enrollment and mutual SSL related features' (#149) from pahansith/device-mgt-core:sync-master into master

Reviewed-on: community/device-mgt-core#149

components/certificate-mgt/io.entgra.device.mgt.core.certificate.mgt.core/src/main/java/io/entgra/device/mgt/core/certificate/mgt/core/bean/Certificate.java

@@ -25,6 +25,15 @@ public class Certificate {
     X509Certificate certificate;
     int tenantId;
     String tenantDomain;
+    String deviceIdentifier;
+
+    public String getDeviceIdentifier() {
+        return deviceIdentifier;
+    }
+
+    public void setDeviceIdentifier(String deviceIdentifier) {
+        this.deviceIdentifier = deviceIdentifier;
+    }
 
     public int getTenantId() {
         return tenantId;

components/certificate-mgt/io.entgra.device.mgt.core.certificate.mgt.core/src/main/java/io/entgra/device/mgt/core/certificate/mgt/core/dao/CertificateDAO.java

@@ -41,6 +41,17 @@ public interface CertificateDAO {
     void addCertificate(List<Certificate> certificate)
             throws CertificateManagementDAOException;
 
+    /**
+     * This can be used to store a certificate in the database, where it will be stored against the serial number
+     * of the certificate.
+     *
+     * @param certificate Holds the certificate and relevant details.
+     * @throws CertificateManagementDAOException
+     *
+     */
+    void addCertificate(Certificate certificate)
+            throws CertificateManagementDAOException;
+
     /**
      * Usage is to obtain a certificate stored in the database by providing the common name.
      *
@@ -51,6 +62,16 @@ public interface CertificateDAO {
      */
     CertificateResponse retrieveCertificate(String serialNumber) throws CertificateManagementDAOException;
 
+    /**
+     * Obtain a certificated stored in the database by providing the common name and the tenant ID
+     *
+     * @param serialNumber Serial number (Common name) of the certificate
+     * @param tenantId ID of the certificate owning tenant
+     * @return representation of the certificate.
+     * @throws CertificateManagementDAOException if fails to read the certificate from the database
+     */
+    CertificateResponse retrieveCertificate(String serialNumber, int tenantId) throws CertificateManagementDAOException;
+
     /**
      * Get all the certificates in a paginated manner.
      *

components/certificate-mgt/io.entgra.device.mgt.core.certificate.mgt.core/src/main/java/io/entgra/device/mgt/core/certificate/mgt/core/dao/impl/AbstractCertificateDAOImpl.java

@@ -81,6 +81,40 @@ public abstract class AbstractCertificateDAOImpl implements CertificateDAO{
         }
     }
 
+    @Override
+    public void addCertificate(Certificate certificate)
+            throws CertificateManagementDAOException {
+        Connection conn;
+        PreparedStatement stmt = null;
+        try {
+            conn = this.getConnection();
+            stmt = conn.prepareStatement(
+                    "INSERT INTO DM_DEVICE_CERTIFICATE (SERIAL_NUMBER, CERTIFICATE, TENANT_ID," +
+                            " USERNAME, DEVICE_IDENTIFIER) VALUES (?,?,?,?,?)");
+            PrivilegedCarbonContext threadLocalCarbonContext = PrivilegedCarbonContext.
+                    getThreadLocalCarbonContext();
+            String username = threadLocalCarbonContext.getUsername();
+            // the serial number of the certificate used for its creation is set as its alias.
+            String serialNumber = certificate.getSerial();
+            if (serialNumber == null || serialNumber.isEmpty()) {
+                serialNumber = String.valueOf(certificate.getCertificate().getSerialNumber());
+            }
+            byte[] bytes = Serializer.serialize(certificate.getCertificate());
+
+            stmt.setString(1, serialNumber);
+            stmt.setBytes(2, bytes);
+            stmt.setInt(3, certificate.getTenantId());
+            stmt.setString(4, username);
+            stmt.setString(5, certificate.getDeviceIdentifier());
+            stmt.executeUpdate();
+        } catch (SQLException | IOException e) {
+            throw new CertificateManagementDAOException("Error occurred while saving the " +
+                    "certificate. ", e);
+        } finally {
+            CertificateManagementDAOUtil.cleanupResources(stmt, null);
+        }
+    }
+
     @Override
     public CertificateResponse retrieveCertificate(String serialNumber)
             throws CertificateManagementDAOException {
@@ -119,6 +153,42 @@ public abstract class AbstractCertificateDAOImpl implements CertificateDAO{
         return certificateResponse;
     }
 
+    @Override
+    public CertificateResponse retrieveCertificate(String serialNumber, int tenantId) throws CertificateManagementDAOException {
+        Connection conn;
+        PreparedStatement stmt = null;
+        ResultSet resultSet = null;
+        CertificateResponse certificateResponse = null;
+        try {
+            conn = this.getConnection();
+            String query =
+                    "SELECT CERTIFICATE, SERIAL_NUMBER, TENANT_ID, USERNAME FROM"
+                            + " DM_DEVICE_CERTIFICATE WHERE SERIAL_NUMBER = ? AND TENANT_ID = ? ";
+            stmt = conn.prepareStatement(query);
+            stmt.setString(1, serialNumber);
+            stmt.setInt(2, tenantId);
+            resultSet = stmt.executeQuery();
+
+            if (resultSet.next()) {
+                certificateResponse = new CertificateResponse();
+                byte[] certificateBytes = resultSet.getBytes("CERTIFICATE");
+                certificateResponse.setCertificate(certificateBytes);
+                certificateResponse.setSerialNumber(resultSet.getString("SERIAL_NUMBER"));
+                certificateResponse.setTenantId(resultSet.getInt("TENANT_ID"));
+                certificateResponse.setUsername(resultSet.getString("USERNAME"));
+                CertificateGenerator.extractCertificateDetails(certificateBytes, certificateResponse);
+            }
+        } catch (SQLException e) {
+            String errorMsg =
+                    "Unable to get the read the certificate with serial" + serialNumber;
+            log.error(errorMsg, e);
+            throw new CertificateManagementDAOException(errorMsg, e);
+        } finally {
+            CertificateManagementDAOUtil.cleanupResources(stmt, resultSet);
+        }
+        return certificateResponse;
+    }
+
     @Override
     public List<CertificateResponse> searchCertificate(String serialNumber)
             throws CertificateManagementDAOException {

components/certificate-mgt/io.entgra.device.mgt.core.certificate.mgt.core/src/main/java/io/entgra/device/mgt/core/certificate/mgt/core/impl/CertificateGenerator.java

@@ -358,15 +358,31 @@ public class CertificateGenerator {
         CertificateResponse lookUpCertificate = null;
         KeyStoreReader keyStoreReader = new KeyStoreReader();
         if (distinguishedName != null && !distinguishedName.isEmpty()) {
-            if (distinguishedName.contains("/CN=")) {
-                String[] dnSplits = distinguishedName.split("/");
+            if (distinguishedName.contains("CN=")) {
+                String[] dnSplits = null;
+                if (distinguishedName.contains("/")) {
+                    dnSplits = distinguishedName.split("/");
+                } else if (distinguishedName.contains(",")) {
+                    //some older versions of nginx will forward the client certificate subject dn separated with commas
+                    dnSplits = distinguishedName.split(",");
+                }
+                String commonNameExtracted = null;
+                int tenantId = 0;
+                if (dnSplits != null && dnSplits.length >= 1) {
                     for (String dnPart : dnSplits) {
                         if (dnPart.contains("CN=")) {
-                        String commonNameExtracted = dnPart.replace("CN=", "");
-                        lookUpCertificate = keyStoreReader.getCertificateBySerial(commonNameExtracted);
-                        break;
+                            commonNameExtracted = dnPart.replace("CN=", "");
+                        } else if (dnPart.contains("OU=")) {
+                            //the OU of the certificate will be like OU=tenant_<TENANT_ID> ex: OU=tenant_-1234
+                            //splitting by underscore to extract the tenant domain
+                            String[] orgUnitSplits = dnPart.split("_");
+                            tenantId = Integer.parseInt(orgUnitSplits[1]);
                         }
                     }
+                }
+
+                lookUpCertificate = keyStoreReader.getCertificateBySerial(commonNameExtracted, tenantId);
+
             } else {
                 LdapName ldapName;
                 try {
@@ -694,6 +710,30 @@ public class CertificateGenerator {
         }
     }
 
+    public void saveCertificate(io.entgra.device.mgt.core.certificate.mgt.core.bean.Certificate
+                                     certificate) throws KeystoreException {
+
+        if (certificate == null) {
+            return;
+        }
+
+        try {
+            CertificateDAO certificateDAO = CertificateManagementDAOFactory.getCertificateDAO();
+            CertificateManagementDAOFactory.beginTransaction();
+            certificateDAO.addCertificate(certificate);
+            CertificateManagementDAOFactory.commitTransaction();
+        } catch (CertificateManagementDAOException e) {
+            String errorMsg = "Error occurred when saving the generated certificate in database";
+            log.error(errorMsg);
+            CertificateManagementDAOFactory.rollbackTransaction();
+            throw new KeystoreException(errorMsg, e);
+        } catch (TransactionManagementException e) {
+            String errorMsg = "Error occurred when saving the generated certificate in database";
+            log.error(errorMsg);
+            throw new KeystoreException(errorMsg, e);
+        }
+    }
+
     public void saveCertInKeyStore(List<io.entgra.device.mgt.core.certificate.mgt.core.bean.Certificate> certificate)
             throws KeystoreException {
 

components/certificate-mgt/io.entgra.device.mgt.core.certificate.mgt.core/src/main/java/io/entgra/device/mgt/core/certificate/mgt/core/impl/KeyStoreReader.java

@@ -275,6 +275,43 @@ public class KeyStoreReader {
         return raPrivateKey;
     }
 
+    public CertificateResponse getCertificateBySerial(String serialNumber, int tenantId) throws KeystoreException {
+        CertificateResponse certificateResponse = null;
+        try {
+            CertificateCacheManager cacheManager = CertificateCacheManagerImpl.getInstance();
+            certificateResponse = cacheManager.getCertificateBySerial(serialNumber);
+            if (certificateResponse == null) {
+                try {
+                    CertificateManagementDAOFactory.openConnection();
+                    certificateResponse = certDao.retrieveCertificate(serialNumber, tenantId);
+                } catch (SQLException e) {
+                    String errorMsg = "Error when making a connection to the database.";
+                    throw new KeystoreException(errorMsg, e);
+                } finally {
+                    CertificateManagementDAOFactory.closeConnection();
+                }
+                if (certificateResponse != null && certificateResponse.getCertificate() != null) {
+                    Certificate certificate = (Certificate) Serializer.deserialize(certificateResponse.getCertificate());
+                    if (certificate instanceof X509Certificate) {
+                        X509Certificate x509cert = (X509Certificate) certificate;
+                        String commonName = CertificateGenerator.getCommonName(x509cert);
+                        certificateResponse.setCommonName(commonName);
+                        cacheManager.addCertificateBySerial(serialNumber, certificateResponse);
+                    }
+                }
+            }
+        } catch (CertificateManagementDAOException e) {
+            String errorMsg = "Error when retrieving certificate from the the database for the serial number: " +
+                    serialNumber;
+            throw new KeystoreException(errorMsg, e);
+
+        } catch (ClassNotFoundException | IOException e) {
+            String errorMsg = "Error when de-serializing saved certificate.";
+            throw new KeystoreException(errorMsg, e);
+        }
+        return certificateResponse;
+    }
+
     public CertificateResponse getCertificateBySerial(String serialNumber) throws KeystoreException {
         CertificateResponse certificateResponse = null;
         try {

components/device-mgt/io.entgra.device.mgt.core.device.mgt.common/src/main/java/io/entgra/device/mgt/core/device/mgt/common/DeviceManagementConstants.java

@@ -134,6 +134,8 @@ public final class DeviceManagementConstants {
         public static final String LAST_NAME = "last-name";
         public static final String TENANT_ADMIN_USERNAME = "tenant-admin-username";
         public static final String TENANT_ADMIN_PASSWORD = "tenant-admin-password";
+
+        public static final int OTP_DEFAULT_EXPIRY_SECONDS = 3600;
     }
 
     public static final class EventServices {

components/device-mgt/io.entgra.device.mgt.core.device.mgt.common/src/main/java/io/entgra/device/mgt/core/device/mgt/common/general/QREnrollmentDetails.java

@@ -25,6 +25,7 @@ public class QREnrollmentDetails {
     String username;
     String enrollmentMode;
     Map<String, String> customValues;
+    int tokenExpiry;
 
     public Map<String, String> getCustomValues() {
         return customValues;
@@ -45,4 +46,12 @@ public class QREnrollmentDetails {
     public String getEnrollmentMode() { return enrollmentMode; }
 
     public void setEnrollmentMode(String enrollmentMode) { this.enrollmentMode = enrollmentMode; }
+
+    public int getTokenExpiry() {
+        return tokenExpiry;
+    }
+
+    public void setTokenExpiry(int tokenExpiry) {
+        this.tokenExpiry = tokenExpiry;
+    }
 }

components/device-mgt/io.entgra.device.mgt.core.device.mgt.common/src/main/java/io/entgra/device/mgt/core/device/mgt/common/otp/mgt/OTPEmailTypes.java

@@ -19,5 +19,5 @@
 package io.entgra.device.mgt.core.device.mgt.common.otp.mgt;
 
 public enum OTPEmailTypes {
-    USER_VERIFY, DEVICE_ENROLLMENT
+    USER_VERIFY, DEVICE_ENROLLMENT, USER_INVITE, REMOTE_SESSION
 }

components/device-mgt/io.entgra.device.mgt.core.device.mgt.common/src/main/java/io/entgra/device/mgt/core/device/mgt/common/spi/OTPManagementService.java

@@ -35,7 +35,8 @@ public interface OTPManagementService {
      * @throws OTPManagementException if error occurred whle verifying validity of the OPT
      * @throws BadRequestException if found an null value for OTP
      */
-    OneTimePinDTO isValidOTP(String oneTimeToken) throws OTPManagementException, BadRequestException;
+    OneTimePinDTO isValidOTP(String oneTimeToken, boolean requireRenewal) throws
+            OTPManagementException, BadRequestException;
 
     /**
      * Invalidate the OTP and send welcome mail
@@ -59,8 +60,7 @@ public interface OTPManagementService {
     boolean hasEmailRegistered(String email, String emailDomain) throws OTPManagementException,
             DeviceManagementException;
 
-    OneTimePinDTO generateOneTimePin(String email, String emailType, String userName, Object metaDataObj,
-                                     int tenantId, boolean persistPin) throws OTPManagementException;
+    OneTimePinDTO generateOneTimePin(OneTimePinDTO oneTimePinData, boolean persistPin) throws OTPManagementException;
 
     OneTimePinDTO getRenewedOtpByEmailAndMailType(String email, String emailType) throws OTPManagementException;
 

components/device-mgt/io.entgra.device.mgt.core.device.mgt.config.api/src/main/java/io/entgra/device/mgt/core/device/mgt/config/api/service/DeviceManagementConfigService.java

@@ -156,7 +156,12 @@ public interface DeviceManagementConfigService {
                     value = "The properties list using for query a device",
                     required = true)
             @QueryParam("properties")
-                    String properties);
+                    String properties,
+            @ApiParam(
+                    name = "withAccessToken",
+                    value = "Whether to use access token or otp token for device configuration")
+            @QueryParam("withAccessToken")
+                    boolean withAccessToken);
 
     @PUT
     @Path("/device/transfer")

components/device-mgt/io.entgra.device.mgt.core.device.mgt.config.api/src/main/java/io/entgra/device/mgt/core/device/mgt/config/api/service/impl/DeviceManagementConfigServiceImpl.java

@@ -21,6 +21,10 @@ import com.fasterxml.jackson.core.JsonParseException;
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.JsonMappingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import io.entgra.device.mgt.core.device.mgt.common.exceptions.OTPManagementException;
+import io.entgra.device.mgt.core.device.mgt.common.otp.mgt.OTPEmailTypes;
+import io.entgra.device.mgt.core.device.mgt.common.otp.mgt.dto.OneTimePinDTO;
+import io.entgra.device.mgt.core.device.mgt.common.spi.OTPManagementService;
 import io.entgra.device.mgt.core.device.mgt.config.api.beans.ErrorResponse;
 import io.entgra.device.mgt.core.device.mgt.config.api.service.DeviceManagementConfigService;
 import io.entgra.device.mgt.core.device.mgt.config.api.util.DeviceMgtAPIUtils;
@@ -77,7 +81,8 @@ public class DeviceManagementConfigServiceImpl implements DeviceManagementConfig
     @Path("/configurations")
     @Produces(MediaType.APPLICATION_JSON)
     public Response getConfiguration(@HeaderParam("token") String token,
-                                     @QueryParam("properties") String properties) {
+                                     @QueryParam("properties") String properties,
+                                     @QueryParam("withAccessToken") boolean withAccessToken) {
         DeviceManagementProviderService dms = DeviceMgtAPIUtils.getDeviceManagementService();
         try {
             if (token == null || token.isEmpty()) {
@@ -102,7 +107,8 @@ public class DeviceManagementConfigServiceImpl implements DeviceManagementConfig
             deviceProps.put("token", token);
             DeviceConfiguration devicesConfiguration =
                     dms.getDeviceConfiguration(deviceProps);
-            setAccessTokenToDeviceConfigurations(devicesConfiguration);
+            if (withAccessToken) setAccessTokenToDeviceConfigurations(devicesConfiguration);
+                else setOTPTokenToDeviceConfigurations(devicesConfiguration);
             return Response.status(Response.Status.OK).entity(devicesConfiguration).build();
         } catch (DeviceManagementException e) {
             String msg = "Error occurred while retrieving configurations";
@@ -214,6 +220,33 @@ public class DeviceManagementConfigServiceImpl implements DeviceManagementConfig
         }
     }
 
+    private void setOTPTokenToDeviceConfigurations(DeviceConfiguration deviceConfiguration)
+            throws DeviceManagementException {
+        OneTimePinDTO oneTimePinData = new OneTimePinDTO();
+        oneTimePinData.setEmail(OTPEmailTypes.DEVICE_ENROLLMENT.toString());
+        oneTimePinData.setEmailType(OTPEmailTypes.DEVICE_ENROLLMENT.toString());
+        oneTimePinData.setUsername(deviceConfiguration.getDeviceOwner());
+        PrivilegedCarbonContext.startTenantFlow();
+        PrivilegedCarbonContext.getThreadLocalCarbonContext().setTenantDomain(
+                deviceConfiguration.getTenantDomain(), true);
+        oneTimePinData.setTenantId(PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId());
+        PrivilegedCarbonContext.endTenantFlow();
+        OTPManagementService otpManagementService = DeviceMgtAPIUtils.getOtpManagementService();
+        try {
+            OneTimePinDTO oneTimePinDTO = otpManagementService.generateOneTimePin(oneTimePinData, true);
+            if (oneTimePinDTO == null) {
+                String msg = "Null value returned when generating OTP token for " + oneTimePinData.getOtpToken();
+                log.error(msg);
+                throw new DeviceManagementException(msg);
+            }
+            deviceConfiguration.setAccessToken(oneTimePinDTO.getOtpToken());
+        } catch (OTPManagementException ex) {
+            String msg = "Error occurred while generating one time pin: " + ex.getMessage();
+            log.error(msg, ex);
+            throw new DeviceManagementException(msg, ex);
+        }
+    }
+
     @Override
     @Path("/tenants")
     @GET

components/device-mgt/io.entgra.device.mgt.core.device.mgt.config.api/src/main/java/io/entgra/device/mgt/core/device/mgt/config/api/util/DeviceMgtAPIUtils.java

@@ -21,6 +21,7 @@ package io.entgra.device.mgt.core.device.mgt.config.api.util;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.context.PrivilegedCarbonContext;
+import io.entgra.device.mgt.core.device.mgt.common.spi.OTPManagementService;
 import io.entgra.device.mgt.core.device.mgt.core.service.DeviceManagementProviderService;
 import org.wso2.carbon.user.core.service.RealmService;
 
@@ -34,6 +35,8 @@ public class DeviceMgtAPIUtils {
     private static DeviceManagementProviderService deviceManagementProviderService = null;
     private static RealmService realmService = null;
 
+    private static OTPManagementService otpManagementService = null;
+
     public static DeviceManagementProviderService getDeviceManagementService() {
         if (deviceManagementProviderService == null) {
             PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
@@ -48,6 +51,19 @@ public class DeviceMgtAPIUtils {
         return deviceManagementProviderService;
     }
 
+    public static OTPManagementService getOtpManagementService() {
+        if (otpManagementService == null) {
+            PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
+            otpManagementService = (OTPManagementService) ctx.getOSGiService(OTPManagementService.class, null);
+            if (otpManagementService == null) {
+                String msg = "OTP Management Service has not initialized.";
+                log.error(msg);
+                throw new IllegalStateException(msg);
+            }
+        }
+        return otpManagementService;
+    }
+
     public static RealmService getRealmService() {
         if (realmService == null) {
             PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/otp/mgt/dao/impl/GenericOTPManagementDAOImpl.java

@@ -18,6 +18,7 @@
 
 package io.entgra.device.mgt.core.device.mgt.core.otp.mgt.dao.impl;
 
+import io.entgra.device.mgt.core.device.mgt.common.DeviceManagementConstants;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import io.entgra.device.mgt.core.device.mgt.common.exceptions.DBConnectionException;
@@ -56,7 +57,8 @@ public class GenericOTPManagementDAOImpl extends AbstractDAOImpl implements OTPM
                 + "META_INFO, "
                 + "CREATED_AT,"
                 + "TENANT_ID,"
-                + "USERNAME) VALUES (?, ?, ?, ?, ?, ?, ?)";
+                + "USERNAME, "
+                + "EXPIRY_TIME) VALUES (?, ?, ?, ?, ?, ?, ?, ?)";
         try {
             Connection conn = this.getDBConnection();
             Calendar calendar = Calendar.getInstance();
@@ -70,6 +72,8 @@ public class GenericOTPManagementDAOImpl extends AbstractDAOImpl implements OTPM
                     stmt.setTimestamp(5, timestamp);
                     stmt.setInt(6, oneTimePinDTO.getTenantId());
                     stmt.setString(7, oneTimePinDTO.getUsername());
+                    stmt.setInt(8, oneTimePinDTO.getExpiryTime() == 0
+                            ? DeviceManagementConstants.OTPProperties.OTP_DEFAULT_EXPIRY_SECONDS : oneTimePinDTO.getExpiryTime());
                     stmt.addBatch();
                 }
                 stmt.executeBatch();

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/otp/mgt/service/OTPManagementServiceImpl.java

@@ -127,7 +127,8 @@ public class OTPManagementServiceImpl implements OTPManagementService {
     }
 
     @Override
-    public OneTimePinDTO isValidOTP(String oneTimeToken) throws OTPManagementException, BadRequestException {
+    public OneTimePinDTO isValidOTP(String oneTimeToken, boolean requireRenewal) throws OTPManagementException,
+            BadRequestException {
         if (StringUtils.isBlank(oneTimeToken)){
             String msg = "Received blank OTP to verify. OTP: " + oneTimeToken;
             log.error(msg);
@@ -151,6 +152,7 @@ public class OTPManagementServiceImpl implements OTPManagementService {
                 oneTimePinDTO.getCreatedAt().getTime() + oneTimePinDTO.getExpiryTime() * 1000L);
 
         if (currentTimestamp.after(expiredTimestamp)) {
+            if (requireRenewal) {
                 String renewedOTP = UUID.randomUUID().toString();
                 renewOTP(oneTimePinDTO, renewedOTP);
                 Gson gson = new Gson();
@@ -162,6 +164,7 @@ public class OTPManagementServiceImpl implements OTPManagementService {
                 props.setProperty("email", oneTimePinDTO.getEmail());
                 props.setProperty("type", oneTimePinDTO.getEmailType());
                 sendMail(props, oneTimePinDTO.getEmail(), DeviceManagementConstants.EmailAttributes.USER_VERIFY_TEMPLATE);
+            }
             return null;
         }
         return oneTimePinDTO;
@@ -244,8 +247,14 @@ public class OTPManagementServiceImpl implements OTPManagementService {
             for (String username : deviceEnrollmentInvitation.getUsernames()) {
                 String emailAddress = DeviceManagerUtil.getUserClaimValue(
                         username, DeviceManagementConstants.User.CLAIM_EMAIL_ADDRESS);
-                oneTimePinDTO = generateOneTimePin(emailAddress, OTPEmailTypes.DEVICE_ENROLLMENT.toString(), username,
-                        null, tenantId, false);
+
+                OneTimePinDTO oneTimePinData = new OneTimePinDTO();
+                oneTimePinData.setEmail(emailAddress);
+                oneTimePinData.setTenantId(tenantId);
+                oneTimePinData.setUsername(username);
+                oneTimePinData.setEmailType(OTPEmailTypes.USER_INVITE.toString());
+
+                oneTimePinDTO = generateOneTimePin(oneTimePinData, false);
                 oneTimePinDTOList.add(oneTimePinDTO);
                 props.setProperty("first-name", DeviceManagerUtil.
                         getUserClaimValue(username, DeviceManagementConstants.User.CLAIM_FIRST_NAME));
@@ -279,27 +288,17 @@ public class OTPManagementServiceImpl implements OTPManagementService {
 
     /**
      * Create One Time Token
-     * @param email email
-     * @param emailType email type
-     * @param userName username
-     * @param metaDataObj meta data object
-     * @param tenantId tenant Id
+     * @param oneTimePinDTO Data related to the one time pin
      * @return {@link OneTimePinDTO}
      */
     @Override
-    public OneTimePinDTO generateOneTimePin(String email, String emailType, String userName, Object metaDataObj,
-                                            int tenantId, boolean persistPin) throws OTPManagementException {
+    public OneTimePinDTO generateOneTimePin(OneTimePinDTO oneTimePinDTO, boolean persistPin) throws OTPManagementException {
 
         String otpValue = UUID.randomUUID().toString();
 
         Gson gson = new Gson();
-        String metaInfo = gson.toJson(metaDataObj);
+        String metaInfo = gson.toJson(oneTimePinDTO.getMetaInfo());
 
-        OneTimePinDTO oneTimePinDTO = new OneTimePinDTO();
-        oneTimePinDTO.setEmail(email);
-        oneTimePinDTO.setTenantId(tenantId);
-        oneTimePinDTO.setUsername(userName);
-        oneTimePinDTO.setEmailType(emailType);
         oneTimePinDTO.setMetaInfo(metaInfo);
         oneTimePinDTO.setOtpToken(otpValue);
 

components/ui-request-interceptor/io.entgra.device.mgt.core.ui.request.interceptor/src/main/java/io/entgra/device/mgt/core/ui/request/interceptor/DefaultTokenHandler.java

@@ -19,7 +19,6 @@
 package io.entgra.device.mgt.core.ui.request.interceptor;
 
 import com.google.gson.Gson;
-import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
 import io.entgra.device.mgt.core.ui.request.interceptor.beans.AuthData;
@@ -28,12 +27,17 @@ import io.entgra.device.mgt.core.ui.request.interceptor.util.HandlerUtil;
 import org.apache.commons.lang.StringUtils;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import org.apache.http.HttpHeaders;
 import org.apache.http.HttpStatus;
-import org.apache.http.client.methods.HttpGet;
 import org.apache.http.client.utils.URIBuilder;
-import org.apache.http.entity.ContentType;
 import io.entgra.device.mgt.core.ui.request.interceptor.beans.ProxyResponse;
+import org.wso2.carbon.context.PrivilegedCarbonContext;
+import io.entgra.device.mgt.core.device.mgt.common.DeviceManagementConstants;
+import io.entgra.device.mgt.core.device.mgt.common.exceptions.OTPManagementException;
+import io.entgra.device.mgt.core.device.mgt.common.otp.mgt.OTPEmailTypes;
+import io.entgra.device.mgt.core.device.mgt.common.otp.mgt.dto.OneTimePinDTO;
+import io.entgra.device.mgt.core.device.mgt.common.spi.OTPManagementService;
+import org.wso2.carbon.user.api.UserStoreException;
+import org.wso2.carbon.user.core.service.RealmService;
 
 import javax.servlet.annotation.MultipartConfig;
 import javax.servlet.annotation.WebServlet;
@@ -55,71 +59,28 @@ public class DefaultTokenHandler extends HttpServlet {
             HttpSession httpSession = req.getSession(false);
 
             if (httpSession != null) {
-                AuthData authData = (AuthData) httpSession.getAttribute(HandlerConstants.SESSION_AUTH_DATA_KEY);
-                if (authData == null) {
-                    HandlerUtil.sendUnAuthorizeResponse(resp);
-                    return;
-                }
-
-                AuthData defaultAuthData = (AuthData) httpSession
-                        .getAttribute(HandlerConstants.SESSION_DEFAULT_AUTH_DATA_KEY);
-                if (defaultAuthData != null) {
-                    HandlerUtil.handleSuccess(resp, constructSuccessProxyResponse(defaultAuthData.getAccessToken()));
-                    return;
-                }
-
-                String clientId = authData.getClientId();
-                String clientSecret = authData.getClientSecret();
-
-                String queryString = req.getQueryString();
-                String scopeString = "";
-                if (StringUtils.isNotEmpty(queryString)) {
-                    scopeString = req.getParameter("scopes");
-                    if (scopeString != null) {
-                        scopeString = "?scopes=" + scopeString;
-                    }
-                }
-
-                String iotsCoreUrl = req.getScheme() + HandlerConstants.SCHEME_SEPARATOR
-                        + System.getProperty(HandlerConstants.IOT_GW_HOST_ENV_VAR)
-                        + HandlerConstants.COLON + HandlerUtil.getGatewayPort(req.getScheme());
-                String tokenUrl = iotsCoreUrl + "/api/device-mgt/v1.0/devices/" + clientId
-                                + "/" + clientSecret + "/default-token" + scopeString;
-
-                HttpGet defaultTokenRequest = new HttpGet(tokenUrl);
-                defaultTokenRequest
-                        .setHeader(HttpHeaders.AUTHORIZATION, HandlerConstants.BEARER + authData.getAccessToken());
-                defaultTokenRequest
-                        .setHeader(HttpHeaders.CONTENT_TYPE, ContentType.APPLICATION_FORM_URLENCODED.toString());
-                ProxyResponse tokenResultResponse = HandlerUtil.execute(defaultTokenRequest);
-
-                if (tokenResultResponse.getExecutorResponse().contains(HandlerConstants.EXECUTOR_EXCEPTION_PREFIX)) {
-                    log.error("Error occurred while invoking the API to get default token data.");
-                    HandlerUtil.handleError(resp, tokenResultResponse);
-                    return;
-                }
-                String tokenResult = tokenResultResponse.getData();
-                if (tokenResult == null) {
-                    log.error("Invalid default token response is received.");
-                    HandlerUtil.handleError(resp, tokenResultResponse);
-                    return;
+                String userWithDomain = (String) httpSession.getAttribute(HandlerConstants.USERNAME_WITH_DOMAIN);
+                String[] userNameParts = userWithDomain.split("@");
+
+                OneTimePinDTO oneTimePinData = new OneTimePinDTO();
+                oneTimePinData.setEmail(OTPEmailTypes.REMOTE_SESSION.toString());
+                oneTimePinData.setEmailType(OTPEmailTypes.REMOTE_SESSION.toString());
+                oneTimePinData.setUsername(userNameParts[0]);
+                PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
+                RealmService realmService = (RealmService) ctx.getOSGiService(RealmService.class, null);
+                try {
+                    oneTimePinData.setTenantId(realmService.getTenantManager().getTenantId(userNameParts[1]));
+                } catch (UserStoreException e) {
+                    throw new RuntimeException(e);
                 }
-
-                JsonParser jsonParser = new JsonParser();
-                JsonElement jTokenResult = jsonParser.parse(tokenResult);
-                if (jTokenResult.isJsonObject()) {
-                    JsonObject jTokenResultAsJsonObject = jTokenResult.getAsJsonObject();
-                    AuthData newDefaultAuthData = new AuthData();
-                    newDefaultAuthData.setClientId(clientId);
-                    newDefaultAuthData.setClientSecret(clientSecret);
-
-                    String defaultToken = jTokenResultAsJsonObject.get("accessToken").getAsString();
-                    newDefaultAuthData.setAccessToken(defaultToken);
-                    newDefaultAuthData.setRefreshToken(jTokenResultAsJsonObject.get("refreshToken").getAsString());
-                    newDefaultAuthData.setScope(jTokenResultAsJsonObject.get("scopes").getAsString());
-                    httpSession.setAttribute(HandlerConstants.SESSION_DEFAULT_AUTH_DATA_KEY, newDefaultAuthData);
-
-                    HandlerUtil.handleSuccess(resp, constructSuccessProxyResponse(defaultToken));
+                oneTimePinData.setExpiryTime(DeviceManagementConstants.OTPProperties.OTP_DEFAULT_EXPIRY_SECONDS);
+                OTPManagementService otpManagementService = HandlerUtil.getOTPManagementService();
+                try {
+                    oneTimePinData = otpManagementService.generateOneTimePin(oneTimePinData, true);
+                    HandlerUtil.handleSuccess(resp, constructSuccessProxyResponse(oneTimePinData.getOtpToken()));
+                } catch (OTPManagementException e) {
+                    log.error("Failed while generating remote session OTP for user " + userWithDomain, e);
+                    HandlerUtil.handleError(resp, HttpStatus.SC_INTERNAL_SERVER_ERROR);
                 }
             } else {
                 HandlerUtil.sendUnAuthorizeResponse(resp);

components/ui-request-interceptor/io.entgra.device.mgt.core.ui.request.interceptor/src/main/java/io/entgra/device/mgt/core/ui/request/interceptor/UserHandler.java

@@ -120,6 +120,7 @@ public class UserHandler extends HttpServlet {
                 proxyResponse.setData(
                         jTokenResultAsJsonObject.get("username").getAsString().replaceAll("@carbon.super", ""));
                 HandlerUtil.handleSuccess(resp, proxyResponse);
+                httpSession.setAttribute(HandlerConstants.USERNAME_WITH_DOMAIN, jTokenResultAsJsonObject.get("username").getAsString());
                 log.info("Customer login", userLogContextBuilder.setUserName(proxyResponse.getData()).setUserRegistered(true).build());
             }
         } catch (IOException e) {

components/ui-request-interceptor/io.entgra.device.mgt.core.ui.request.interceptor/src/main/java/io/entgra/device/mgt/core/ui/request/interceptor/util/HandlerConstants.java

@@ -106,4 +106,5 @@ public class HandlerConstants {
     public static final String IOT_REPORTING_WEBAPP_HOST_ENV_VAR = "iot.reporting.webapp.host";
     public static final String USER_SCOPES = "userScopes";
     public static final String HUBSPOT_CHAT_URL = "api.hubapi.com";
+    public static final String USERNAME_WITH_DOMAIN = "usernameWithDomain";
 }

components/ui-request-interceptor/io.entgra.device.mgt.core.ui.request.interceptor/src/main/java/io/entgra/device/mgt/core/ui/request/interceptor/util/HandlerUtil.java

@@ -55,6 +55,8 @@ import org.json.JSONException;
 import org.json.JSONObject;
 import org.w3c.dom.Document;
 import io.entgra.device.mgt.core.ui.request.interceptor.beans.ProxyResponse;
+import org.wso2.carbon.context.PrivilegedCarbonContext;
+import io.entgra.device.mgt.core.device.mgt.common.spi.OTPManagementService;
 import org.xml.sax.SAXException;
 
 import javax.servlet.http.HttpServletRequest;
@@ -79,6 +81,8 @@ public class HandlerUtil {
     private static boolean isLoginCacheInitialized = false;
     private static AuthData authData;
 
+    private static OTPManagementService otpManagementService;
+
     /***
      *
      * @param httpRequest - httpMethod e.g:- HttpPost, HttpGet
@@ -751,4 +755,12 @@ public class HandlerUtil {
     public static boolean isPropertyDefined(String property) {
         return StringUtils.isEmpty(System.getProperty(property));
     }
+
+    public static OTPManagementService getOTPManagementService() {
+        if (otpManagementService == null) {
+            otpManagementService = (OTPManagementService) PrivilegedCarbonContext
+                    .getThreadLocalCarbonContext().getOSGiService(OTPManagementService.class, null);
+        }
+        return otpManagementService;
+    }
 }

components/webapp-authenticator-framework/io.entgra.device.mgt.core.webapp.authenticator.framework/src/main/java/io/entgra/device/mgt/core/webapp/authenticator/framework/authenticator/BasicAuthAuthenticator.java

@@ -35,6 +35,7 @@ import io.entgra.device.mgt.core.webapp.authenticator.framework.Utils.Utils;
 import java.nio.charset.Charset;
 import java.util.Base64;
 import java.util.Properties;
+import java.util.StringTokenizer;
 
 public class BasicAuthAuthenticator implements WebappAuthenticator {
 
@@ -50,16 +51,24 @@ public class BasicAuthAuthenticator implements WebappAuthenticator {
     @Override
     public boolean canHandle(Request request) {
         /*
-        This is done to avoid every endpoint being able to use basic auth. Add the following to
-        the required web.xml of the web app.
+        This is done to avoid every web app being able to use basic auth. Add the following to
+        the required web.xml of the web app. This is a global config for a web app to allow all
+        contexts of the web app to use basic auth
         <context-param>
             <param-name>basicAuth</param-name>
             <param-value>true</param-value>
 	    </context-param>
+
+	    Adding the basicAuthAllowList parameter allows to selectively allow some context paths in a
+	    web app to use basic auth while all the other context remain unavailable with basic auth.
+	    If this parameter is present, any context that requires basic auth must be specially
+	    added as comma separated list to the param-value of basicAuthAllowList.
          */
+        if (!isAllowListedForBasicAuth(request)) {
             if (!isAuthenticationSupported(request)) {
                 return false;
             }
+        }
         if (request.getCoyoteRequest() == null || request.getCoyoteRequest().getMimeHeaders() == null) {
             return false;
         }
@@ -75,6 +84,20 @@ public class BasicAuthAuthenticator implements WebappAuthenticator {
         return false;
     }
 
+    private boolean isAllowListedForBasicAuth(Request request) {
+        String param = request.getContext().findParameter("basicAuthAllowList");
+        if (param != null && !param.isEmpty()) {
+            //Add the nonSecured end-points to cache
+            String[] basicAuthAllowList = param.split(",");
+            for (String contexPath : basicAuthAllowList) {
+                if (request.getRequestURI().toString().endsWith(contexPath.trim())) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
     @Override
     public AuthenticationInfo authenticate(Request request, Response response) {
         AuthenticationInfo authenticationInfo = new AuthenticationInfo();

components/webapp-authenticator-framework/io.entgra.device.mgt.core.webapp.authenticator.framework/src/main/java/io/entgra/device/mgt/core/webapp/authenticator/framework/authenticator/CertificateAuthenticator.java

@@ -74,9 +74,17 @@ public class CertificateAuthenticator implements WebappAuthenticator {
             // When there is a load balancer terminating mutual SSL, it should pass this header along and
             // as the value of this header, the client certificate subject dn should be passed.
             if (request.getHeader(PROXY_MUTUAL_AUTH_HEADER) != null) {
+                if (log.isDebugEnabled()) {
+                    log.debug("PROXY_MUTUAL_AUTH_HEADER " + request.getHeader(PROXY_MUTUAL_AUTH_HEADER));
+                }
                 CertificateResponse certificateResponse = AuthenticatorFrameworkDataHolder.getInstance().
                         getCertificateManagementService().verifySubjectDN(request.getHeader(PROXY_MUTUAL_AUTH_HEADER));
                 authenticationInfo = checkCertificateResponse(certificateResponse);
+                if (log.isDebugEnabled()) {
+                    log.debug("Certificate Serial : " + certificateResponse.getSerialNumber()
+                            + ", CN : " + certificateResponse.getCommonName()
+                            + " , username" + authenticationInfo.getUsername());
+                }
             }
             else if (request.getHeader(MUTUAL_AUTH_HEADER) != null) {
                 Object object = request.getAttribute(CLIENT_CERTIFICATE_ATTRIBUTE);
@@ -89,7 +97,6 @@ public class CertificateAuthenticator implements WebappAuthenticator {
                     CertificateResponse certificateResponse = AuthenticatorFrameworkDataHolder.getInstance().
                             getCertificateManagementService().verifyPEMSignature(clientCertificate[0]);
                     authenticationInfo = checkCertificateResponse(certificateResponse);
-
                 } else {
                     authenticationInfo.setStatus(Status.FAILURE);
                     authenticationInfo.setMessage("No client certificate is present");

components/webapp-authenticator-framework/io.entgra.device.mgt.core.webapp.authenticator.framework/src/main/java/io/entgra/device/mgt/core/webapp/authenticator/framework/authenticator/OneTimeTokenAuthenticator.java

@@ -49,8 +49,18 @@ public class OneTimeTokenAuthenticator implements WebappAuthenticator {
         try {
             OTPManagementService otpManagementService = AuthenticatorFrameworkDataHolder.getInstance()
                     .getOtpManagementService();
-            OneTimePinDTO validOTP = otpManagementService.isValidOTP(request.getHeader(Constants.HTTPHeaders
-                    .ONE_TIME_TOKEN_HEADER));
+            OneTimePinDTO validOTP;
+            if (request.getRequestURI().toString().endsWith("cloud/download-url")
+                    || request.getRequestURI().toString().endsWith("cloud/tenant")) {
+                validOTP = otpManagementService.isValidOTP(request.getHeader(Constants.HTTPHeaders
+                        .ONE_TIME_TOKEN_HEADER), true);
+            } else {
+                log.info("Validating OTP for enrollments PIN: " + request.getHeader(Constants
+                        .HTTPHeaders.ONE_TIME_TOKEN_HEADER));
+                validOTP = otpManagementService.isValidOTP(request.getHeader(Constants.HTTPHeaders
+                        .ONE_TIME_TOKEN_HEADER), false);
+            }
+
             if (validOTP != null) {
                 authenticationInfo.setStatus(Status.CONTINUE);
                 authenticationInfo.setTenantId(validOTP.getTenantId());