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Bignum: remove unnecessary NULL pointer checks

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A null pointer dereference, or null pointer plus small offset, is a
clean runtime error in most environments. So it's not particularly
useful to protect against this.

While at it make a null pointer check that is actually necessary more
robust.

Signed-off-by: Janos Follath <janos.follath@arm.com>
This commit is contained in:
Janos Follath
2022-08-11 15:19:00 +01:00
parent 296ea66442
commit 56a10f97ba
3 changed files with 5 additions and 12 deletions
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6
library/bignum_mod.c
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@ -47,9 +47,6 @@ int mbedtls_mpi_mod_residue_setup( mbedtls_mpi_mod_residue *r,
mbedtls_mpi_uint *p,
size_t pn )
{
if( p == NULL || m == NULL || r == NULL )
return( MBEDTLS_ERR_MPI_BAD_INPUT_DATA );
if( pn < m->n || !mbedtls_mpi_core_lt_ct( m->p, p, pn ) )
return( MBEDTLS_ERR_MPI_BAD_INPUT_DATA );
@ -112,9 +109,6 @@ int mbedtls_mpi_mod_modulus_setup( mbedtls_mpi_mod_modulus *m,
{
int ret = 0;
if ( p == NULL || m == NULL )
return( MBEDTLS_ERR_MPI_BAD_INPUT_DATA );
m->p = p;
m->n = pn;
m->plen = mbedtls_mpi_core_bitlen( p, pn );