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Introduce helper function for init/free of MPI array

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Signed-off-by: Hanno Becker <hanno.becker@arm.com>
This commit is contained in:
Hanno Becker 2022-01-10 11:16:51 +00:00
parent ac4d4bc97c
commit 466df6e713
1 changed files with 20 additions and 35 deletions
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55
library/ecp.c
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@ -342,6 +342,18 @@ int mbedtls_ecp_check_budget( const mbedtls_ecp_group *grp,
#endif /* MBEDTLS_ECP_RESTARTABLE */
static void mpi_init_many( mbedtls_mpi *arr, unsigned size )
{
while( size-- )
mbedtls_mpi_init( arr++ );
}
static void mpi_free_many( mbedtls_mpi *arr, unsigned size )
{
while( size-- )
mbedtls_mpi_free( arr++ );
}
/*
* List of supported curves:
* - internal ID
@ -1812,10 +1824,7 @@ static int ecp_precompute_comb( const mbedtls_ecp_group *grp,
mbedtls_mpi tmp[4];
mbedtls_mpi_init( &tmp[0] );
mbedtls_mpi_init( &tmp[1] );
mbedtls_mpi_init( &tmp[2] );
mbedtls_mpi_init( &tmp[3] );
mpi_init_many( tmp, sizeof( tmp ) / sizeof( mbedtls_mpi ) );
#if defined(MBEDTLS_ECP_RESTARTABLE)
if( rs_ctx != NULL && rs_ctx->rsm != NULL )
@ -1938,10 +1947,7 @@ norm_add:
cleanup:
mbedtls_mpi_free( &tmp[0] );
mbedtls_mpi_free( &tmp[1] );
mbedtls_mpi_free( &tmp[2] );
mbedtls_mpi_free( &tmp[3] );
mpi_free_many( tmp, sizeof( tmp ) / sizeof( mbedtls_mpi ) );
#if defined(MBEDTLS_ECP_RESTARTABLE)
if( rs_ctx != NULL && rs_ctx->rsm != NULL &&
@ -2005,10 +2011,7 @@ static int ecp_mul_comb_core( const mbedtls_ecp_group *grp, mbedtls_ecp_point *R
size_t i;
mbedtls_ecp_point_init( &Txi );
mbedtls_mpi_init( &tmp[0] );
mbedtls_mpi_init( &tmp[1] );
mbedtls_mpi_init( &tmp[2] );
mbedtls_mpi_init( &tmp[3] );
mpi_init_many( tmp, sizeof( tmp ) / sizeof( mbedtls_mpi ) );
#if !defined(MBEDTLS_ECP_RESTARTABLE)
(void) rs_ctx;
@ -2051,11 +2054,7 @@ static int ecp_mul_comb_core( const mbedtls_ecp_group *grp, mbedtls_ecp_point *R
cleanup:
mbedtls_ecp_point_free( &Txi );
mbedtls_mpi_free( &tmp[0] );
mbedtls_mpi_free( &tmp[1] );
mbedtls_mpi_free( &tmp[2] );
mbedtls_mpi_free( &tmp[3] );
mpi_free_many( tmp, sizeof( tmp ) / sizeof( mbedtls_mpi ) );
#if defined(MBEDTLS_ECP_RESTARTABLE)
if( rs_ctx != NULL && rs_ctx->rsm != NULL &&
@ -2509,10 +2508,7 @@ static int ecp_mul_mxz( mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
mbedtls_mpi tmp[4];
mbedtls_ecp_point_init( &RP ); mbedtls_mpi_init( &PX );
mbedtls_mpi_init( &tmp[0] );
mbedtls_mpi_init( &tmp[1] );
mbedtls_mpi_init( &tmp[2] );
mbedtls_mpi_init( &tmp[3] );
mpi_init_many( tmp, sizeof( tmp ) / sizeof( mbedtls_mpi ) );
if( f_rng == NULL )
return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );
@ -2568,11 +2564,7 @@ static int ecp_mul_mxz( mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
cleanup:
mbedtls_ecp_point_free( &RP ); mbedtls_mpi_free( &PX );
mbedtls_mpi_free( &tmp[0] );
mbedtls_mpi_free( &tmp[1] );
mbedtls_mpi_free( &tmp[2] );
mbedtls_mpi_free( &tmp[3] );
mpi_free_many( tmp, sizeof( tmp ) / sizeof( mbedtls_mpi ) );
return( ret );
}
@ -2797,11 +2789,7 @@ int mbedtls_ecp_muladd_restartable(
return( MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE );
mbedtls_ecp_point_init( &mP );
mbedtls_mpi_init( &tmp[0] );
mbedtls_mpi_init( &tmp[1] );
mbedtls_mpi_init( &tmp[2] );
mbedtls_mpi_init( &tmp[3] );
mpi_init_many( tmp, sizeof( tmp ) / sizeof( mbedtls_mpi ) );
ECP_RS_ENTER( ma );
@ -2860,10 +2848,7 @@ norm:
cleanup:
mbedtls_mpi_free( &tmp[0] );
mbedtls_mpi_free( &tmp[1] );
mbedtls_mpi_free( &tmp[2] );
mbedtls_mpi_free( &tmp[3] );
mpi_free_many( tmp, sizeof( tmp ) / sizeof( mbedtls_mpi ) );
#if defined(MBEDTLS_ECP_INTERNAL_ALT)
if( is_grp_capable )