Added some function header document for new interface

Signed-off-by: Qiu Feng <feng.qiu@intel.com>

Author: fqiu1

QuoteGeneration/quote_wrapper/qgs_msg_lib/qgs_msg_lib.cpp

@@ -800,6 +800,15 @@ qgs_msg_error_t qgs_msg_inflate_get_collateral_resp(
     return ret;
 }
 
+/**
+ * @brief Get the message type from the serialized message buffer.
+ *
+ * @param p_serialized_msg Pointer to the serialized message buffer.
+ * @param size Size of the serialized message buffer.
+ * @param p_type Pointer to a uint32_t variable to store the message type.
+ *
+ * @return qgs_msg_error_t The error code, QGS_MSG_SUCCESS on success.
+ */
 uint32_t qgs_msg_get_type(const uint8_t *p_serialized_msg, uint32_t size, uint32_t *p_type) {
     qgs_msg_error_t ret = QGS_MSG_SUCCESS;
     const qgs_msg_header_t *p_header = (const qgs_msg_header_t *)p_serialized_msg;
@@ -823,6 +832,21 @@ uint32_t qgs_msg_get_type(const uint8_t *p_serialized_msg, uint32_t size, uint32
     return ret;
 }
 
+/**
+ * @brief Generates a GET_PLATFORM_INFO request message
+ *
+ * This function generates a GET_PLATFORM_INFO request message and returns it
+ * as a byte array.
+ *
+ * @param pp_req A pointer to a pointer to the generated request message byte
+ *               array. The caller is responsible for freeing this memory after
+ *               use.
+ * @param p_req_size A pointer to the size of the generated request message in
+ *                   bytes. Upon successful execution, the function updates this
+ *                   value to reflect the size of the generated message.
+ *
+ * @return qgs_msg_error_t The error code, QGS_MSG_SUCCESS on success.
+ */
 qgs_msg_error_t qgs_msg_gen_get_platform_info_req(
     uint8_t **pp_req, uint32_t *p_req_size)
 {
@@ -854,6 +878,14 @@ qgs_msg_error_t qgs_msg_gen_get_platform_info_req(
     return ret;
 }
 
+/**
+ * @brief Inflate a serialized GET_PLATFORM_INFO_REQ message and validate it.
+ *
+ * @param p_serialized_req A pointer to the serialized GET_PLATFORM_INFO_REQ
+ *                         message.
+ * @param size The size of the serialized message in bytes.
+ * @return qgs_msg_error_t The error code, QGS_MSG_SUCCESS on success.
+ */
 qgs_msg_error_t qgs_msg_inflate_get_platform_info_req(
     const uint8_t *p_serialized_req, uint32_t size)
 {
@@ -897,6 +929,22 @@ qgs_msg_error_t qgs_msg_inflate_get_platform_info_req(
     return ret;
 }
 
+/**
+ * @brief Generates a response message with the given information about the platform.
+ *
+ * @param tdqe_isvsvn ISVSVN of the TDQE enclave in the platform.
+ * @param pce_isvsvn ISVSVN of the PCE enclave in the platform.
+ * @param p_platform_id Pointer to an array of bytes that contains the platform
+ *                      identification.
+ * @param platform_id_size The size in bytes of the platform identification.
+ * @param p_cpusvn Pointer to an array of bytes that contains the CPUSVN.
+ * @param cpusvn_size The size in bytes of the CPUSVN.
+ * @param pp_resp Pointer to a pointer to the response message buffer.
+                  The caller is responsible for freeing this memory after use.
+ * @param p_resp_size Pointer to the size of the response message buffer.
+ *
+ * @return qgs_msg_error_t The error code, QGS_MSG_SUCCESS on success.
+ */
 qgs_msg_error_t qgs_msg_gen_get_platform_info_resp(
     uint16_t tdqe_isvsvn, uint16_t pce_isvsvn,
     const uint8_t *p_platform_id, uint32_t platform_id_size,
@@ -964,6 +1012,19 @@ qgs_msg_error_t qgs_msg_gen_get_platform_info_resp(
     return ret;
 }
 
+/**
+ * @brief Extracts platform information from a serialized response message.
+ *
+ * @param p_serialized_resp Pointer to the serialized response message.
+ * @param size The size of the serialized response message.
+ * @param p_tdqe_isvsvn Pointer to the TDQE ISVSVN.
+ * @param p_pce_isvsvn Pointer to the PCE ISVSVN.
+ * @param pp_platform_id Pointer to a pointer to the platform ID.
+ * @param p_platform_id_size Pointer to the size of the platform ID.
+ * @param pp_cpusvn Pointer to a pointer to the CPUSVN.
+ * @param p_cpusvn_size Pointer to the size of the CPUSVN.
+ * @return qgs_msg_error_t The error code, QGS_MSG_SUCCESS on success.
+ */
 qgs_msg_error_t qgs_msg_inflate_get_platform_info_resp(
     const uint8_t *p_serialized_resp, uint32_t size,
     uint16_t *p_tdqe_isvsvn, uint16_t *p_pce_isvsvn,