commit aef0f2de9ffc8629151f6a011abe98482b2c7670
author Gabor Mezei <gabor.mezei@arm.com> Tue Feb 14 18:18:37 2023 +0100
committer Gabor Mezei <gabor.mezei@arm.com> Tue Feb 21 11:35:31 2023 +0100
tree 0e49a8884477d94bb6fe663c6c728493166fb054
parent e14b5bdba71e49002b71d2644b8e98e7b1cf6737

Fix limb size calculation

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>

library/ecp_curves.c

diff --git a/library/ecp_curves.c b/library/ecp_curves.c
index a4b49ae..e1e3537 100644
--- a/library/ecp_curves.c
+++ b/library/ecp_curves.c
@@ -5051,7 +5051,7 @@
 static int ecp_mod_p224(mbedtls_mpi *N)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-    size_t expected_width = 2 * ((224 + biL - 1) / biL);
+    size_t expected_width =  2 * 224 / biL;
     MBEDTLS_MPI_CHK(mbedtls_mpi_grow(N, expected_width));
     ret = ecp_mod_p224_raw(N->p, expected_width);
 cleanup:
@@ -5061,7 +5061,7 @@
 MBEDTLS_STATIC_TESTABLE
 int ecp_mod_p224_raw(mbedtls_mpi_uint *Np, size_t Nn)
 {
-    if (Nn != 2 * ((224 + biL - 1) / biL)) {
+    if (Nn != 2 * 224 / biL) {
         return MBEDTLS_ERR_ECP_BAD_INPUT_DATA;
     }