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bignum_mod: Added mbedtls_mpi_mod_read/write() IO functions

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This patch adds input and ouput fucntions in the `bignum_mod` layer.
The data will be automatically converted between Cannonical and
Montgomery representation if required.

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
This commit is contained in:
Minos Galanakis
2022-11-10 14:40:38 +00:00
committed by Janos Follath
parent 590ae5363d
commit 81f4b11010
2 changed files with 91 additions and 0 deletions
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47
library/bignum_mod.c
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@ -209,7 +209,54 @@ exit:
/* END MERGE SLOT 6 */
/* BEGIN MERGE SLOT 7 */
int mbedtls_mpi_mod_read( mbedtls_mpi_mod_residue *r,
mbedtls_mpi_mod_modulus *m,
unsigned char *buf,
size_t buflen )
{
int ret = MBEDTLS_ERR_MPI_BAD_INPUT_DATA;
if ( r == NULL || m == NULL )
goto cleanup;
if ( r->p == NULL || m->p == NULL || r->limbs > m->limbs ||\
r->limbs == 0 || m->limbs == 0 )
goto cleanup;
ret = mbedtls_mpi_mod_raw_read( r->p, m, buf, buflen );
if( ret != 0 )
goto cleanup;
if (m->int_rep == MBEDTLS_MPI_MOD_REP_MONTGOMERY)
ret = mbedtls_mpi_mod_raw_to_mont_rep(r->p, m);
cleanup:
return ( ret );
}
int mbedtls_mpi_mod_write( mbedtls_mpi_mod_residue *r,
mbedtls_mpi_mod_modulus *m,
unsigned char *buf,
size_t buflen )
{
int ret = MBEDTLS_ERR_MPI_BAD_INPUT_DATA;
if ( r == NULL || m == NULL )
goto cleanup;
if ( r->p == NULL || m->p == NULL || r->limbs > m->limbs ||\
r->limbs == 0 || m->limbs == 0 )
goto cleanup;
if ( m->int_rep == MBEDTLS_MPI_MOD_REP_MONTGOMERY)
ret = mbedtls_mpi_mod_raw_from_mont_rep( r->p, m );
ret = mbedtls_mpi_mod_raw_write( r->p, m, buf, buflen );
cleanup:
return ( ret );
}
/* END MERGE SLOT 7 */
/* BEGIN MERGE SLOT 8 */