yuzu-emu/mbedtls
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Replace sizeof(mbedtls_mpi_uint) with ciL define

Browse source 
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
This commit is contained in:
Paul Elliott 2023-06-14 17:52:42 +01:00
parent 3646dc78bc
commit b8f7305b02
1 changed files with 5 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
library/ecp_curves.c
View file

@ -5545,7 +5545,7 @@ int mbedtls_ecp_mod_p448(mbedtls_mpi_uint *X, size_t X_limbs)
(void) mbedtls_mpi_core_add(X, X, Q, Q_limbs);
/* M = B0 */
if (sizeof(mbedtls_mpi_uint) > 4) {
if (ciL > 4) {
M[P224_WIDTH_MIN] &= ((mbedtls_mpi_uint)-1) >> (P224_UNUSED_BITS);
}
memset(M + P224_WIDTH_MAX, 0, ((M_limbs - P224_WIDTH_MAX) * ciL));
@ -5555,7 +5555,7 @@ int mbedtls_ecp_mod_p448(mbedtls_mpi_uint *X, size_t X_limbs)
/* M = (B0 + B1) * 2^224 */
/* Shifted carry bit from the addition fits in oversize M. */
memmove((char *) M + P224_SIZE, M, P224_SIZE + sizeof(mbedtls_mpi_uint));
memmove((char *) M + P224_SIZE, M, P224_SIZE + ciL);
memset(M, 0, P224_SIZE);
/* X = X + M = (A0 + A1 + B1) + (B0 + B1) * 2^224 */
@ -5578,14 +5578,14 @@ int mbedtls_ecp_mod_p448(mbedtls_mpi_uint *X, size_t X_limbs)
memcpy(M, Q, (Q_limbs * ciL));
M[M_limbs - 1] = 0;
if (sizeof(mbedtls_mpi_uint) > 4) {
if (ciL > 4) {
M[P224_WIDTH_MIN] &= ((mbedtls_mpi_uint) -1) >> (P224_UNUSED_BITS);
}
/* M = B0 * 2^224
* Oversize M once again takes any carry. */
memmove((char *) M + P224_SIZE, M, P224_SIZE +
sizeof(mbedtls_mpi_uint)); memset(M, 0, P224_SIZE);
memmove((char *) M + P224_SIZE, M, P224_SIZE + ciL);
memset(M, 0, P224_SIZE);
/* M = A1 + B0 * 2^224
* No need to have to call mbedtls_mpi_core_add() as as both bignums