diff options
Diffstat (limited to 'src/include/ipxe/bigint.h')
| -rw-r--r-- | src/include/ipxe/bigint.h | 40 |
1 files changed, 35 insertions, 5 deletions
diff --git a/src/include/ipxe/bigint.h b/src/include/ipxe/bigint.h index 2f99f844..3dc344df 100644 --- a/src/include/ipxe/bigint.h +++ b/src/include/ipxe/bigint.h @@ -8,6 +8,8 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); +#include <assert.h> + /** * Define a big-integer type * @@ -177,6 +179,30 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); } while ( 0 ) /** + * Copy big integer + * + * @v source Source big integer + * @v dest Destination big integer + */ +#define bigint_copy( source, dest ) do { \ + build_assert ( sizeof ( *(source) ) == sizeof ( *(dest) ) ); \ + bigint_shrink ( (source), (dest) ); \ + } 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 @@ -184,10 +210,11 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); * @v result Big integer to hold result */ #define bigint_multiply( multiplicand, multiplier, result ) do { \ - unsigned int size = bigint_size (multiplicand); \ + unsigned int multiplicand_size = bigint_size (multiplicand); \ + unsigned int multiplier_size = bigint_size (multiplier); \ bigint_multiply_raw ( (multiplicand)->element, \ - (multiplier)->element, (result)->element, \ - size ); \ + multiplicand_size, (multiplier)->element, \ + multiplier_size, (result)->element ); \ } while ( 0 ) /** @@ -282,10 +309,13 @@ 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, - bigint_element_t *result0, - unsigned int size ); + unsigned int multiplier_size, + bigint_element_t *result0 ); void bigint_mod_multiply_raw ( const bigint_element_t *multiplicand0, const bigint_element_t *multiplier0, const bigint_element_t *modulus0, |