commit e72bf2da3d66c0a69231fd88e58f41e4c94b6170
author Minos Galanakis <minos.galanakis@arm.com> Wed May 24 15:13:21 2023 +0100
committer Minos Galanakis <minos.galanakis@arm.com> Wed May 24 15:13:42 2023 +0100
tree e4728b3b71d944a496c10a368737073061ff1ff9
parent ec00b500b52a4a8cbe398a76efa20bcbdad6ffea

ecp_curves: Adjusted the expected limb size for `ecp_mod_p255()`.

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>

library/ecp_curves.c

diff --git a/library/ecp_curves.c b/library/ecp_curves.c
index 6192f6a..4fc4b1d 100644
--- a/library/ecp_curves.c
+++ b/library/ecp_curves.c
@@ -5421,7 +5421,7 @@
 static int ecp_mod_p255(mbedtls_mpi *N)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-    size_t expected_width = 2 * ((255 + biL - 1) / biL);
+    size_t expected_width = 2 * P255_WIDTH;
     MBEDTLS_MPI_CHK(mbedtls_mpi_grow(N, expected_width));
     ret = mbedtls_ecp_mod_p255_raw(N->p, expected_width);
 cleanup: