commit 30f3b4d60112ffe68cc162cc01938b84d18c9960
author Tom Cosgrove <tom.cosgrove@arm.com> Mon Dec 12 16:54:57 2022 +0000
committer Tom Cosgrove <tom.cosgrove@arm.com> Thu Dec 15 16:56:36 2022 +0000
tree e1126819890b98b854327977bb315706c80c5486
parent e9ffb6c8e9c0476cbfb450249c05ba8b97f6f5c4

Add mbedtls_mpi_core_check_zero_ct() and tests

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>

library/bignum_core.c

diff --git a/library/bignum_core.c b/library/bignum_core.c
index 1ce8457..75cce05 100644
--- a/library/bignum_core.c
+++ b/library/bignum_core.c
@@ -742,6 +742,17 @@
     return( c );
 }
 
+mbedtls_mpi_uint mbedtls_mpi_core_check_zero_ct( const mbedtls_mpi_uint *A,
+                                                 size_t limbs )
+{
+    mbedtls_mpi_uint bits = 0;
+
+    for( size_t i = 0; i < limbs; i++ )
+        bits |= A[i];
+
+    return( bits );
+}
+
 /* END MERGE SLOT 3 */
 
 /* BEGIN MERGE SLOT 4 */