diff options
Diffstat (limited to 'modexp.c')
| -rw-r--r-- | modexp.c | 6 |
1 files changed, 5 insertions, 1 deletions
@@ -391,6 +391,7 @@ hal_error_t hal_modexpng(hal_modexpng_arg_t *a) goto fail; } else { + /* set blinding factors to (1,1) */ uint8_t one[a->mod_len]; memset(one, 0, sizeof(one)); one[sizeof(one) - 1] = 1; if ((err = set_buffer(a->core, MODEXPNG_ADDR_BANK_X, one, sizeof(one))) != HAL_OK || (err = set_buffer(a->core, MODEXPNG_ADDR_BANK_Y, one, sizeof(one))) != HAL_OK) @@ -417,7 +418,10 @@ hal_error_t hal_modexpng(hal_modexpng_arg_t *a) if ((err = hal_io_zero(a->core)) != HAL_OK || (err = hal_io_next(a->core)) != HAL_OK || (err = hal_io_wait_valid(a->core)) != HAL_OK || - (err = get_buffer(a->core, MODEXPNG_ADDR_BANK_S, a->result, a->result_len)) != HAL_OK) + (err = get_buffer(a->core, MODEXPNG_ADDR_BANK_S, a->result, a->result_len)) != HAL_OK || + ((a->bf != NULL && a->ubf != NULL) && + ((err = get_buffer(a->core, MODEXPNG_ADDR_BANK_XM, a->ubf, a->ubf_len)) != HAL_OK || + (err = get_buffer(a->core, MODEXPNG_ADDR_BANK_YM, a->bf, a->bf_len)) != HAL_OK))) goto fail; fail: |