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bootutil: fix FIH int conversion for security_cnt 

Currently there's a compile error when building MCUboot
with HW_ROLLBACK_PROT due to a comparison
when decoding the security_cnt fih_int value. In the security_cnt.h
it is stated that this value must be between 0 and UINT32_MAX
so this cast would not cause any undefined behaviour.

Signed-off-by: Roland Mikhel <roland.mikhel@arm.com>
Change-Id: Iee158a31955ff43b73e67a0c08e7a086077b9eb5
This commit is contained in:
Roland Mikhel 2023-04-25 14:03:08 +02:00 committed by Dávid Vincze
parent e6e4801ce2
commit 61962b94f3
1 changed files with 1 additions and 1 deletions
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2
boot/bootutil/src/image_validate.c
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@ -494,7 +494,7 @@ bootutil_img_validate(struct enc_key_data *enc_state, int image_index,
* stored security counter value.
*/
fih_rc = fih_ret_encode_zero_equality(img_security_cnt <
fih_int_decode(security_cnt));
(uint32_t)fih_int_decode(security_cnt));
if (FIH_NOT_EQ(fih_rc, FIH_SUCCESS)) {
FIH_SET(fih_rc, FIH_FAILURE);
goto out;