HostNameInCertificate Fix

src/main/java/com/microsoft/sqlserver/jdbc/SQLServerConnection.java

@@ -116,6 +116,8 @@ public class SQLServerConnection implements ISQLServerConnection {
     private byte[] accessTokenInByte = null;
 
     private SqlFedAuthToken fedAuthToken = null;
+
+    private String originalHostNameInCertificate = null;
 
     static class Sha1HashKey {
         private byte[] bytes;
@@ -401,7 +403,7 @@ private enum State {
     ServerPortPlaceHolder getRoutingInfo() {
         return routingInfo;
     }
-
+    
     // Permission targets
     private static final String callAbortPerm = "callAbort";
 
@@ -1198,6 +1200,23 @@ Connection connectInternal(Properties propsIn,
             activeConnectionProperties = (Properties) propsIn.clone();
 
             pooledConnectionParent = pooledConnection;
+
+            String hostNameInCertificate = activeConnectionProperties.
+                    getProperty(SQLServerDriverStringProperty.HOSTNAME_IN_CERTIFICATE.toString());
+
+            // hostNameInCertificate property can change when redirection is involved, so maintain this value
+            // for every instance of SQLServerConnection.
+            if (null == originalHostNameInCertificate && null != hostNameInCertificate && !hostNameInCertificate.isEmpty()) {
+                originalHostNameInCertificate = activeConnectionProperties.
+                        getProperty(SQLServerDriverStringProperty.HOSTNAME_IN_CERTIFICATE.toString());
+            }
+
+            if (null != originalHostNameInCertificate && !originalHostNameInCertificate.isEmpty()) {
+                // if hostNameInCertificate has a legitimate value (and not empty or null),
+                // reset hostNameInCertificate to the original value every time we connect (or re-connect).
+                activeConnectionProperties.setProperty(SQLServerDriverStringProperty.HOSTNAME_IN_CERTIFICATE.toString(), 
+                        originalHostNameInCertificate);
+            }
 
             String sPropKey;
             String sPropValue;
@@ -3680,7 +3699,6 @@ final void processEnvChange(TDSReader tdsReader) throws SQLServerException {
 
                 isRoutedInCurrentAttempt = true;
                 routingInfo = new ServerPortPlaceHolder(routingServerName, routingPortNumber, null, integratedSecurity);
-
                 break;
 
             // Error on unrecognized, unused ENVCHANGES