diff --git a/oem/ibm/libpldmresponder/file_io_type_cert.hpp b/oem/ibm/libpldmresponder/file_io_type_cert.hpp
index ee34575..4e4ad6b 100644
--- a/oem/ibm/libpldmresponder/file_io_type_cert.hpp
+++ b/oem/ibm/libpldmresponder/file_io_type_cert.hpp
@@ -8,7 +8,6 @@
 {
 namespace responder
 {
-
 using Fd = int;
 using RemainingSize = uint64_t;
 using CertDetails = std::tuple<Fd, RemainingSize>;
@@ -48,6 +47,18 @@
 
     virtual int newFileAvailable(uint64_t length);
 
+    virtual int fileAckWithMetaData(uint8_t /*fileStatus*/,
+                                    uint32_t /*metaDataValue1*/,
+                                    uint32_t /*metaDataValue2*/,
+                                    uint32_t /*metaDataValue3*/,
+                                    uint32_t /*metaDataValue4*/);
+
+    virtual int newFileAvailableWithMetaData(uint64_t length,
+                                             uint32_t metaDataValue1,
+                                             uint32_t /*metaDataValue2*/,
+                                             uint32_t /*metaDataValue3*/,
+                                             uint32_t /*metaDataValue4*/);
+
     /** @brief CertHandler destructor
      */
     ~CertHandler()
@@ -57,6 +68,10 @@
     uint16_t certType;      //!< type of the certificate
     static CertMap certMap; //!< holds the fd and remaining read/write size for
                             //!< each certificate
+    enum SignedCertStatus
+    {
+        PLDM_INVALID_CERT_DATA = 0X03
+    };
 };
 } // namespace responder
 } // namespace pldm