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More consistent variable names

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Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2022-11-16 19:48:23 +01:00 committed by Janos Follath
parent 0ec6e3f394
commit 07f2c69511
1 changed files with 12 additions and 12 deletions
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24
library/bignum_core.c
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@ -608,7 +608,7 @@ int mbedtls_mpi_core_exp_mod( mbedtls_mpi_uint *X,
/* heap allocated memory pool */
mbedtls_mpi_uint *mempool = NULL;
/* pointers to temporaries within memory pool */
mbedtls_mpi_uint *Wtbl, *Wselect, *temp;
mbedtls_mpi_uint *Wtable, *Wselect, *temp;
/* pointers to table entries */
mbedtls_mpi_uint *Wcur, *Wlast, *W1;
@ -624,8 +624,8 @@ int mbedtls_mpi_core_exp_mod( mbedtls_mpi_uint *X,
/* Allocate memory pool and set pointers to parts of it */
const size_t table_limbs = welem * AN_limbs;
const size_t temp_limbs = 2 * AN_limbs + 1;
const size_t wselect_limbs = AN_limbs;
const size_t total_limbs = table_limbs + temp_limbs + wselect_limbs;
const size_t select_limbs = AN_limbs;
const size_t total_limbs = table_limbs + temp_limbs + select_limbs;
mempool = mbedtls_calloc( total_limbs, sizeof(mbedtls_mpi_uint) );
if( mempool == NULL )
@ -634,19 +634,19 @@ int mbedtls_mpi_core_exp_mod( mbedtls_mpi_uint *X,
goto cleanup;
}
Wtbl = mempool;
Wselect = Wtbl + table_limbs;
temp = Wselect + wselect_limbs;
Wtable = mempool;
Wselect = Wtable + table_limbs;
temp = Wselect + select_limbs;
/*
* Window precomputation
*/
/* W[0] = 1 (in Montgomery presentation) */
memset( Wtbl, 0, AN_limbs * ciL );
Wtbl[0] = 1;
mbedtls_mpi_core_montmul( Wtbl, Wtbl, RR, AN_limbs, N, AN_limbs, mm, temp );
Wcur = Wtbl + AN_limbs;
memset( Wtable, 0, AN_limbs * ciL );
Wtable[0] = 1;
mbedtls_mpi_core_montmul( Wtable, Wtable, RR, AN_limbs, N, AN_limbs, mm, temp );
Wcur = Wtable + AN_limbs;
/* W[1] = A * R^2 * R^-1 mod N = A * R mod N */
memcpy( Wcur, A, AN_limbs * ciL );
mbedtls_mpi_core_montmul( Wcur, Wcur, RR, AN_limbs, N, AN_limbs, mm, temp );
@ -662,7 +662,7 @@ int mbedtls_mpi_core_exp_mod( mbedtls_mpi_uint *X,
*/
/* X = 1 (in Montgomery presentation) initially */
memcpy( X, Wtbl, AN_limbs * ciL );
memcpy( X, Wtable, AN_limbs * ciL );
size_t limb_bits_remaining = 0;
mbedtls_mpi_uint cur_limb, window = 0;
@ -682,7 +682,7 @@ int mbedtls_mpi_core_exp_mod( mbedtls_mpi_uint *X,
if( window_bits == 0 )
break;
/* Select table entry, square and multiply */
mbedtls_mpi_core_ct_uint_table_lookup( Wselect, Wtbl,
mbedtls_mpi_core_ct_uint_table_lookup( Wselect, Wtable,
AN_limbs, welem, window );
mbedtls_mpi_core_montmul( X, X, Wselect, AN_limbs, N, AN_limbs, mm, temp );
window = window_bits = 0;