summaryrefslogtreecommitdiffstats
path: root/qemu/roms/ipxe/src/crypto/bigint.c
diff options
context:
space:
mode:
Diffstat (limited to 'qemu/roms/ipxe/src/crypto/bigint.c')
-rw-r--r--qemu/roms/ipxe/src/crypto/bigint.c139
1 files changed, 0 insertions, 139 deletions
diff --git a/qemu/roms/ipxe/src/crypto/bigint.c b/qemu/roms/ipxe/src/crypto/bigint.c
deleted file mode 100644
index 50f320302..000000000
--- a/qemu/roms/ipxe/src/crypto/bigint.c
+++ /dev/null
@@ -1,139 +0,0 @@
-/*
- * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- * You can also choose to distribute this program under the terms of
- * the Unmodified Binary Distribution Licence (as given in the file
- * COPYING.UBDL), provided that you have satisfied its requirements.
- */
-
-FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
-
-#include <stdint.h>
-#include <string.h>
-#include <assert.h>
-#include <ipxe/bigint.h>
-
-/** @file
- *
- * Big integer support
- */
-
-/**
- * Perform modular multiplication of big integers
- *
- * @v multiplicand0 Element 0 of big integer to be multiplied
- * @v multiplier0 Element 0 of big integer to be multiplied
- * @v modulus0 Element 0 of big integer modulus
- * @v result0 Element 0 of big integer to hold result
- * @v size Number of elements in base, modulus, and result
- * @v tmp Temporary working space
- */
-void bigint_mod_multiply_raw ( const bigint_element_t *multiplicand0,
- const bigint_element_t *multiplier0,
- const bigint_element_t *modulus0,
- bigint_element_t *result0,
- unsigned int size, void *tmp ) {
- const bigint_t ( size ) __attribute__ (( may_alias )) *multiplicand =
- ( ( const void * ) multiplicand0 );
- const bigint_t ( size ) __attribute__ (( may_alias )) *multiplier =
- ( ( const void * ) multiplier0 );
- const bigint_t ( size ) __attribute__ (( may_alias )) *modulus =
- ( ( const void * ) modulus0 );
- bigint_t ( size ) __attribute__ (( may_alias )) *result =
- ( ( void * ) result0 );
- struct {
- bigint_t ( size * 2 ) result;
- bigint_t ( size * 2 ) modulus;
- } *temp = tmp;
- int rotation;
- int i;
-
- /* Sanity check */
- assert ( sizeof ( *temp ) == bigint_mod_multiply_tmp_len ( modulus ) );
-
- /* Perform multiplication */
- bigint_multiply ( multiplicand, multiplier, &temp->result );
-
- /* Rescale modulus to match result */
- bigint_grow ( modulus, &temp->modulus );
- rotation = ( bigint_max_set_bit ( &temp->result ) -
- bigint_max_set_bit ( &temp->modulus ) );
- for ( i = 0 ; i < rotation ; i++ )
- bigint_rol ( &temp->modulus );
-
- /* Subtract multiples of modulus */
- for ( i = 0 ; i <= rotation ; i++ ) {
- if ( bigint_is_geq ( &temp->result, &temp->modulus ) )
- bigint_subtract ( &temp->modulus, &temp->result );
- bigint_ror ( &temp->modulus );
- }
-
- /* Resize result */
- bigint_shrink ( &temp->result, result );
-
- /* Sanity check */
- assert ( bigint_is_geq ( modulus, result ) );
-}
-
-/**
- * Perform modular exponentiation of big integers
- *
- * @v base0 Element 0 of big integer base
- * @v modulus0 Element 0 of big integer modulus
- * @v exponent0 Element 0 of big integer exponent
- * @v result0 Element 0 of big integer to hold result
- * @v size Number of elements in base, modulus, and result
- * @v exponent_size Number of elements in exponent
- * @v tmp Temporary working space
- */
-void bigint_mod_exp_raw ( const bigint_element_t *base0,
- const bigint_element_t *modulus0,
- const bigint_element_t *exponent0,
- bigint_element_t *result0,
- unsigned int size, unsigned int exponent_size,
- void *tmp ) {
- const bigint_t ( size ) __attribute__ (( may_alias )) *base =
- ( ( const void * ) base0 );
- const bigint_t ( size ) __attribute__ (( may_alias )) *modulus =
- ( ( const void * ) modulus0 );
- const bigint_t ( exponent_size ) __attribute__ (( may_alias ))
- *exponent = ( ( const void * ) exponent0 );
- bigint_t ( size ) __attribute__ (( may_alias )) *result =
- ( ( void * ) result0 );
- size_t mod_multiply_len = bigint_mod_multiply_tmp_len ( modulus );
- struct {
- bigint_t ( size ) base;
- bigint_t ( exponent_size ) exponent;
- uint8_t mod_multiply[mod_multiply_len];
- } *temp = tmp;
- static const uint8_t start[1] = { 0x01 };
-
- memcpy ( &temp->base, base, sizeof ( temp->base ) );
- memcpy ( &temp->exponent, exponent, sizeof ( temp->exponent ) );
- bigint_init ( result, start, sizeof ( start ) );
-
- while ( ! bigint_is_zero ( &temp->exponent ) ) {
- if ( bigint_bit_is_set ( &temp->exponent, 0 ) ) {
- bigint_mod_multiply ( result, &temp->base, modulus,
- result, temp->mod_multiply );
- }
- bigint_ror ( &temp->exponent );
- bigint_mod_multiply ( &temp->base, &temp->base, modulus,
- &temp->base, temp->mod_multiply );
- }
-}