From 26d3ef062b33e43e076b7ecef20c4ec3f9441860 Mon Sep 17 00:00:00 2001 From: Michael Brown Date: Tue, 16 Jan 2024 16:09:16 +0000 Subject: [crypto] Allow multiplicand and multiplier to differ in size Big integer multiplication is currently used only as part of modular exponentiation, where both multiplicand and multiplier will be the same size. Relax this requirement to allow for the use of big integer multiplication in other contexts. Signed-off-by: Michael Brown --- src/include/ipxe/bigint.h | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) (limited to 'src/include/ipxe') diff --git a/src/include/ipxe/bigint.h b/src/include/ipxe/bigint.h index 2f99f84..36138dd 100644 --- a/src/include/ipxe/bigint.h +++ b/src/include/ipxe/bigint.h @@ -184,10 +184,11 @@ 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 ) /** @@ -283,9 +284,10 @@ void bigint_shrink_raw ( const bigint_element_t *source0, unsigned int source_size, bigint_element_t *dest0, unsigned int dest_size ); 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, -- cgit v1.1