+ *@enum CACertificateVerificationStatus_t
+ * type of certificate status info to be used when invoking
+ * certificate verification status info callback
+ */
+typedef enum
+{
+ CA_CERTIFICATE_VERIFY_SUCCESS_MUTUAL = 0,
+ CA_CERTIFICATE_VERIFY_NO_CERT,
+ CA_CERTIFICATE_VERIFY_FAILED
+} CACertificateVerificationStatus_t;
+
+/**
+ * Callback function type for certificate verification status.
+ * @param[in] status Certificate verification status info.
+ */
+typedef void (*CertificateVerificationCallback_t)(CACertificateVerificationStatus_t status);
+
+/**