Add MBEDTLS_ECP_MAX_MPI define
Add MBEDTLS_ECP_MAX_MPI define to determine the maximum
number of bytes for the biggest Elliptic curve in bignum
representation.
Signed-off-by: Waleed Elmelegy <waleed.elmelegy@arm.com>
diff --git a/tf-psa-crypto/drivers/builtin/include/mbedtls/ecp.h b/tf-psa-crypto/drivers/builtin/include/mbedtls/ecp.h
index b340614..533482c 100644
--- a/tf-psa-crypto/drivers/builtin/include/mbedtls/ecp.h
+++ b/tf-psa-crypto/drivers/builtin/include/mbedtls/ecp.h
@@ -345,6 +345,8 @@
#define MBEDTLS_ECP_MAX_BYTES ((MBEDTLS_ECP_MAX_BITS + 7) / 8)
#define MBEDTLS_ECP_MAX_PT_LEN (2 * MBEDTLS_ECP_MAX_BYTES + 1)
+#define MBEDTLS_ECP_MAX_MPI ((MBEDTLS_ECP_MAX_BYTES + sizeof(mbedtls_mpi_uint)) & \
+ ~(sizeof(mbedtls_mpi_uint)-1))
#if defined(MBEDTLS_ECP_RESTARTABLE)