diff options
Diffstat (limited to 'src/include/ipxe/bigint.h')
| -rw-r--r-- | src/include/ipxe/bigint.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/include/ipxe/bigint.h b/src/include/ipxe/bigint.h index 820d306b..3dc344df 100644 --- a/src/include/ipxe/bigint.h +++ b/src/include/ipxe/bigint.h @@ -190,6 +190,19 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); } while ( 0 ) /** + * Conditionally swap big integers (in constant time) + * + * @v first Big integer to be conditionally swapped + * @v second Big integer to be conditionally swapped + * @v swap Swap first and second big integers + */ +#define bigint_swap( first, second, swap ) do { \ + unsigned int size = bigint_size (first); \ + bigint_swap_raw ( (first)->element, (second)->element, size, \ + (swap) ); \ + } while ( 0 ) + +/** * Multiply big integers * * @v multiplicand Big integer to be multiplied @@ -296,6 +309,8 @@ void bigint_grow_raw ( const bigint_element_t *source0, void bigint_shrink_raw ( const bigint_element_t *source0, unsigned int source_size, bigint_element_t *dest0, unsigned int dest_size ); +void bigint_swap_raw ( bigint_element_t *first0, bigint_element_t *second0, + unsigned int size, int swap ); void bigint_multiply_raw ( const bigint_element_t *multiplicand0, unsigned int multiplicand_size, const bigint_element_t *multiplier0, |