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bignum_mod: Refactored mbedtls_mpi_mod_read/write()

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This patch adjusts the I/O methods and the tests.
Documentation has also been updated to be more clear.

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
This commit is contained in:
Minos Galanakis
2022-11-24 11:04:11 +00:00
committed by Janos Follath
parent aed832ac16
commit 8b375451c5
3 changed files with 29 additions and 35 deletions
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14
library/bignum_mod.c
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@ -210,8 +210,8 @@ exit:
/* BEGIN MERGE SLOT 7 */
int mbedtls_mpi_mod_read( mbedtls_mpi_mod_residue *r,
mbedtls_mpi_mod_modulus *m,
unsigned char *buf,
const mbedtls_mpi_mod_modulus *m,
const unsigned char *buf,
size_t buflen )
{
int ret = MBEDTLS_ERR_MPI_BAD_INPUT_DATA;
@ -219,7 +219,7 @@ int mbedtls_mpi_mod_read( mbedtls_mpi_mod_residue *r,
if ( r == NULL || m == NULL )
goto cleanup;
if ( r->p == NULL || m->p == NULL || r->limbs > m->limbs ||\
if ( r->p == NULL || m->p == NULL || r->limbs > m->limbs ||
r->limbs == 0 || m->limbs == 0 )
goto cleanup;
@ -228,6 +228,8 @@ int mbedtls_mpi_mod_read( mbedtls_mpi_mod_residue *r,
if( ret != 0 )
goto cleanup;
r->limbs = m->limbs;
if (m->int_rep == MBEDTLS_MPI_MOD_REP_MONTGOMERY)
ret = mbedtls_mpi_mod_raw_to_mont_rep(r->p, m);
@ -235,8 +237,8 @@ cleanup:
return ( ret );
}
int mbedtls_mpi_mod_write( mbedtls_mpi_mod_residue *r,
mbedtls_mpi_mod_modulus *m,
int mbedtls_mpi_mod_write( const mbedtls_mpi_mod_residue *r,
const mbedtls_mpi_mod_modulus *m,
unsigned char *buf,
size_t buflen )
{
@ -245,7 +247,7 @@ int mbedtls_mpi_mod_write( mbedtls_mpi_mod_residue *r,
if ( r == NULL || m == NULL )
goto cleanup;
if ( r->p == NULL || m->p == NULL || r->limbs > m->limbs ||\
if ( r->p == NULL || m->p == NULL || r->limbs > m->limbs ||
r->limbs == 0 || m->limbs == 0 )
goto cleanup;