Add ctr_drbg_free()

include/polarssl/ctr_drbg.h

@@ -130,6 +130,13 @@ int ctr_drbg_init( ctr_drbg_context *ctx,
                    const unsigned char *custom,
                    size_t len );
 
+/**
+ * \brief               Clear CTR_CRBG context data
+ *
+ * \param ctx           CTR_DRBG context to clear
+ */
+void ctr_drbg_free( ctr_drbg_context *ctx );
+
 /**
  * \brief               Enable / disable prediction resistance (Default: Off)
  *