commit 189ee74a8229eaa37b217b225ef81fd404343e2a
author Andrzej Kurek <andrzej.kurek@arm.com> Wed Jun 24 17:28:31 2020 -0400
committer Andrzej Kurek <andrzej.kurek@arm.com> Fri Jul 17 03:28:32 2020 -0400
tree 057864eb14651696dc3a7df6d33c511f6b45dedb
parent 7e6075b7fd5fdb965c9491af2ebd629594bfebd4

Add a platform function to return a random uint32_t

Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>

library/platform_util.c

diff --git a/library/platform_util.c b/library/platform_util.c
index de2fa2b..fc6eb5a 100644
--- a/library/platform_util.c
+++ b/library/platform_util.c
@@ -172,6 +172,20 @@
     return( (int) diff | (int) ( flow_counter ^ num ) );
 }
 
+uint32_t mbedtls_platform_random_uint32( )
+{
+#if !defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
+    return 0;
+#else
+    uint32_t result = 0;
+    size_t olen = 0;
+
+    mbedtls_hardware_poll( NULL, (unsigned char *) &result, sizeof( result ),
+                           &olen );
+    return( result );
+#endif
+}
+
 uint32_t mbedtls_platform_random_in_range( size_t num )
 {
 #if !defined(MBEDTLS_ENTROPY_HARDWARE_ALT)