Add accessor for timing final delay

Signed-off-by: Paul Elliott <paul.elliott@arm.com>

include/mbedtls/timing.h

@@ -90,6 +90,17 @@ void mbedtls_timing_set_delay( void *data, uint32_t int_ms, uint32_t fin_ms );
  */
 int mbedtls_timing_get_delay( void *data );
 
+/**
+ * \brief          Get the final timing delay
+ *
+ * \param data     Pointer to timing data
+ *                 Must point to a valid \c mbedtls_timing_delay_context struct.
+ *
+ * \return         Final timing delay in milliseconds.
+ */
+uint32_t mbedtls_timing_get_final_delay(
+                                     const mbedtls_timing_delay_context *data );
+
 #ifdef __cplusplus
 }
 #endif

library/timing.c

@@ -158,13 +158,28 @@ int mbedtls_timing_get_delay( void *data )
 
     return( 0 );
 }
-#else
-int mbedtls_timing_get_delay( void *data )
+
+/*
+ * Get the final delay.
+ */
+uint32_t mbedtls_timing_get_final_delay(
+                                      const mbedtls_timing_delay_context *data )
+{
+    return( data->fin_ms );
+}
+#else /* MBEDTLS_HAVE_TIME */
+uint32_t mbedtls_timing_get_final_delay(
+                                      const mbedtls_timing_delay_context *data )
 {
     (void) data;
     return( 0 );
 }
 
+int mbedtls_timing_get_delay( void *data )
+{
+    (void) data;
+    return( 0 );
+}
 void mbedtls_timing_set_delay( void *data, uint32_t int_ms, uint32_t fin_ms )
 {
     (void) data;
@@ -178,6 +193,7 @@ unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int
     (void) reset;
     return( 0 );
 }
+
 #endif /* MBEDTLS_HAVE_TIME */
 #endif /* !MBEDTLS_TIMING_ALT */
 #endif /* MBEDTLS_TIMING_C */

tests/suites/test_suite_ssl.function

@@ -5277,3 +5277,14 @@ void conf_group()
     mbedtls_ssl_config_free( &conf );
 }
 /* END_CASE */
+
+/* BEGIN_CASE depends_on:MBEDTLS_TIMING_C:MBEDTLS_HAVE_TIME */
+void timing_accessor( )
+{
+    mbedtls_timing_delay_context    delay_context;
+
+    mbedtls_timing_set_delay( &delay_context, 50, 100 );
+
+    TEST_ASSERT( mbedtls_timing_get_final_delay( &delay_context ) == 100 );
+}
+/* END_CASE */