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Use new CT interface in mbedtls_mpi_core_add_if

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Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman 2023-05-17 15:17:12 +01:00
parent 8ac9a1df24
commit b59b73e2bc
1 changed files with 2 additions and 3 deletions
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5
library/bignum_core.c
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@ -458,11 +458,10 @@ mbedtls_mpi_uint mbedtls_mpi_core_add_if(mbedtls_mpi_uint *X,
{
mbedtls_mpi_uint c = 0;
/* all-bits 0 if cond is 0, all-bits 1 if cond is non-0 */
const mbedtls_mpi_uint mask = mbedtls_ct_mpi_uint_mask(cond);
mbedtls_ct_condition_t do_add = mbedtls_ct_bool(cond);
for (size_t i = 0; i < limbs; i++) {
mbedtls_mpi_uint add = mask & A[i];
mbedtls_mpi_uint add = mbedtls_ct_mpi_uint_if0(do_add, A[i]);
mbedtls_mpi_uint t = c + X[i];
c = (t < X[i]);
t += add;