commit fbe09284cf9f873e97ce6ecf36da2c61ab263d3c
author Steven Cooreman <steven.cooreman@silabs.com> Mon Mar 08 18:41:12 2021 +0100
committer Steven Cooreman <steven.cooreman@silabs.com> Mon Mar 15 10:34:56 2021 +0100
tree 62c0041d13a56f4fcce67d85fb37af7cb98ce08f
parent f66d5fd2bdb776f7a52ea6dec6a8b54923c9ad44

Set output length to 0 at start of function

This behaviour was present previously, and is depended on by the
test suites.

Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>

library/psa_crypto.c

diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index fce7211..a39c535 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -2244,6 +2244,7 @@
                               size_t hash_size,
                               size_t *hash_length )
 {
+    *hash_length = 0;
     if( operation->id == 0 )
         return( PSA_ERROR_BAD_STATE );
 
@@ -2277,6 +2278,7 @@
                                uint8_t *hash, size_t hash_size,
                                size_t *hash_length )
 {
+    *hash_length = 0;
     if( !PSA_ALG_IS_HASH( alg ) )
         return( PSA_ERROR_INVALID_ARGUMENT );