mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-11-22 16:35:41 +01:00
Make some macros/functions public
These will be needed in other modules that already include ecp.h
This commit is contained in:
Manuel Pégourié-Gonnard
parent
b5a50e754d
commit
c751148cc5
@ -198,8 +198,35 @@ typedef struct
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mbedtls_ecp_restart_muladd_ctx *ma; /*!< ecp_muladd() sub-context */
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} mbedtls_ecp_restart_ctx;
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/*
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* Operation counts for restartable functions
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*/
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#define MBEDTLS_ECP_OPS_DBL 8 /*!< basic ops count for ecp_double_jac() */
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#define MBEDTLS_ECP_OPS_ADD 11 /*!< basic ops count for see ecp_add_mixed() */
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#define MBEDTLS_ECP_OPS_INV 120 /*!< empirical equivalent for mpi_mod_inv() */
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/**
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* \brief Internal; for restartable functions in other modules.
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* Check and update basic ops budget.
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*
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* \param grp Group structure
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* \param rs_ctx Restart context
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* \param ops Number of basic ops to do
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*
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* \return 0 is doing 'ops' basic ops is still allowed,
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* MBEDTLS_ERR_ECP_IN_PROGRESS otherwise.
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*/
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int mbedtls_ecp_check_budget( const mbedtls_ecp_group *grp,
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mbedtls_ecp_restart_ctx *rs_ctx,
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unsigned ops );
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/* Utility macro for checking and updating ops budget */
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#define MBEDTLS_ECP_BUDGET( ops ) MBEDTLS_MPI_CHK( mbedtls_ecp_check_budget( grp, rs_ctx, ops ) );
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#else /* MBEDTLS_ECP_RESTARTABLE */
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#define MBEDTLS_ECP_BUDGET( ops ) /* no-op; for compatibility */
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/* We want to declare restartable versions of existing functions anyway */
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typedef void mbedtls_ecp_restart_ctx;
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@ -213,19 +213,12 @@ void mbedtls_ecp_restart_free( mbedtls_ecp_restart_ctx *ctx )
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ctx->ma = NULL;
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}
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/*
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* Operation counts
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*/
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#define ECP_OPS_DBL 8 /* see ecp_double_jac() */
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#define ECP_OPS_ADD 11 /* see ecp_add_mixed() */
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#define ECP_OPS_INV 120 /* empirical equivalent */
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/*
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* Check if we can do the next step
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*/
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static int ecp_check_budget( const mbedtls_ecp_group *grp,
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mbedtls_ecp_restart_ctx *rs_ctx,
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unsigned ops )
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int mbedtls_ecp_check_budget( const mbedtls_ecp_group *grp,
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mbedtls_ecp_restart_ctx *rs_ctx,
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unsigned ops )
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{
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if( rs_ctx != NULL && ecp_max_ops != 0 )
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{
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@ -247,9 +240,6 @@ static int ecp_check_budget( const mbedtls_ecp_group *grp,
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return( 0 );
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}
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#define ECP_BUDGET( ops ) MBEDTLS_MPI_CHK( ecp_check_budget( grp, rs_ctx, ops ) );
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#else
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#define ECP_BUDGET( ops ) /* no-op */
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#endif /* MBEDTLS_ECP_RESTARTABLE */
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#if defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED) || \
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@ -1437,7 +1427,7 @@ static int ecp_precompute_comb( const mbedtls_ecp_group *grp,
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for( ; j < d * ( w - 1 ); j++ )
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{
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ECP_BUDGET( ECP_OPS_DBL );
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MBEDTLS_ECP_BUDGET( MBEDTLS_ECP_OPS_DBL );
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i = 1U << ( j / d );
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cur = T + i;
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@ -1468,7 +1458,7 @@ norm_dbl:
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for( i = 1; i < T_len; i <<= 1 )
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TT[j++] = T + i;
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ECP_BUDGET( ECP_OPS_INV + 6 * j - 2 );
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MBEDTLS_ECP_BUDGET( MBEDTLS_ECP_OPS_INV + 6 * j - 2 );
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MBEDTLS_MPI_CHK( ecp_normalize_jac_many( grp, TT, j ) );
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@ -1485,7 +1475,7 @@ norm_dbl:
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add:
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#endif
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ECP_BUDGET( ( T_len - 1 ) * ECP_OPS_ADD );
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MBEDTLS_ECP_BUDGET( ( T_len - 1 ) * MBEDTLS_ECP_OPS_ADD );
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for( i = 1; i < T_len; i <<= 1 )
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{
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@ -1511,7 +1501,7 @@ norm_add:
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for( j = 0; j + 1 < T_len; j++ )
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TT[j] = T + j + 1;
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ECP_BUDGET( ECP_OPS_INV + 6 * j - 2 );
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MBEDTLS_ECP_BUDGET( MBEDTLS_ECP_OPS_INV + 6 * j - 2 );
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MBEDTLS_MPI_CHK( ecp_normalize_jac_many( grp, TT, j ) );
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@ -1602,7 +1592,7 @@ static int ecp_mul_comb_core( const mbedtls_ecp_group *grp, mbedtls_ecp_point *R
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while( i-- != 0 )
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{
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ECP_BUDGET( ECP_OPS_DBL + ECP_OPS_ADD );
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MBEDTLS_ECP_BUDGET( MBEDTLS_ECP_OPS_DBL + MBEDTLS_ECP_OPS_ADD );
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MBEDTLS_MPI_CHK( ecp_double_jac( grp, R, R ) );
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MBEDTLS_MPI_CHK( ecp_select_comb( grp, &Txi, T, t_len, x[i] ) );
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MBEDTLS_MPI_CHK( ecp_add_mixed( grp, R, R, &Txi ) );
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@ -1723,7 +1713,7 @@ static int ecp_mul_comb_after_precomp( const mbedtls_ecp_group *grp,
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#endif
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}
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ECP_BUDGET( ECP_OPS_INV );
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MBEDTLS_ECP_BUDGET( MBEDTLS_ECP_OPS_INV );
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MBEDTLS_MPI_CHK( ecp_normalize_jac( grp, RR ) );
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#if defined(MBEDTLS_ECP_RESTARTABLE)
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@ -2162,7 +2152,7 @@ int mbedtls_ecp_mul_restartable( mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
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MBEDTLS_MPI_CHK( mbedtls_ecp_check_pubkey( grp, P ) );
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/* check_privkey is 0M and check_pubkey is 3M */
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ECP_BUDGET( 3 );
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MBEDTLS_ECP_BUDGET( 3 );
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}
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ret = MBEDTLS_ERR_ECP_BAD_INPUT_DATA;
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@ -2365,7 +2355,7 @@ mul2:
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add:
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#endif
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ECP_BUDGET( ECP_OPS_ADD );
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MBEDTLS_ECP_BUDGET( MBEDTLS_ECP_OPS_ADD );
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MBEDTLS_MPI_CHK( ecp_add_mixed( grp, pR, pmP, pR ) );
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#if defined(MBEDTLS_ECP_RESTARTABLE)
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if( rs_ctx != NULL && rs_ctx->ma != NULL )
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@ -2373,7 +2363,7 @@ add:
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norm:
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#endif
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ECP_BUDGET( ECP_OPS_INV );
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MBEDTLS_ECP_BUDGET( MBEDTLS_ECP_OPS_INV );
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MBEDTLS_MPI_CHK( ecp_normalize_jac( grp, pR ) );
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#if defined(MBEDTLS_ECP_RESTARTABLE)
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