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/* mpi.h - Multi Precision Integers
* Copyright (C) 1994, 1996, 1998, 2001, 2002, 2003 Free Software Foundation, Inc.
*
* This file is part of Libgcrypt.
*
* Libgcrypt is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser general Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Libgcrypt 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
* Note: This code is heavily based on the GNU MP Library.
* Actually it's the same code with only minor changes in the
* way the data is stored; this is to support the abstraction
* of an optional secure memory allocation which may be used
* to avoid revealing of sensitive data due to paging etc.
*/
#ifndef G10_MPI_H
#define G10_MPI_H
#include <config.h>
#include <stdio.h>
#include "types.h"
#include "memory.h"
#include "../mpi/mpi-asm-defs.h"
#include "g10lib.h"
#ifndef _GCRYPT_IN_LIBGCRYPT
#error this file should only be used inside libgcrypt
#endif
#ifndef BITS_PER_MPI_LIMB
#if BYTES_PER_MPI_LIMB == SIZEOF_UNSIGNED_INT
typedef unsigned int mpi_limb_t;
typedef signed int mpi_limb_signed_t;
#elif BYTES_PER_MPI_LIMB == SIZEOF_UNSIGNED_LONG
typedef unsigned long int mpi_limb_t;
typedef signed long int mpi_limb_signed_t;
#elif BYTES_PER_MPI_LIMB == SIZEOF_UNSIGNED_LONG_LONG
typedef unsigned long long int mpi_limb_t;
typedef signed long long int mpi_limb_signed_t;
#elif BYTES_PER_MPI_LIMB == SIZEOF_UNSIGNED_SHORT
typedef unsigned short int mpi_limb_t;
typedef signed short int mpi_limb_signed_t;
#else
#error BYTES_PER_MPI_LIMB does not match any C type
#endif
#define BITS_PER_MPI_LIMB (8*BYTES_PER_MPI_LIMB)
#endif /*BITS_PER_MPI_LIMB*/
#define DBG_MPI _gcry_get_debug_flag( 2 );
struct gcry_mpi {
int alloced; /* array size (# of allocated limbs) */
int nlimbs; /* number of valid limbs */
int sign; /* indicates a negative number and is used for opaque
* MPIs to store the length */
unsigned flags; /* bit 0: array must be allocated in secure memory space */
/* bit 2: the limb is a pointer to some m_alloced data */
mpi_limb_t *d; /* array with the limbs */
};
#define MPI_NULL NULL
#define mpi_get_nlimbs(a) ((a)->nlimbs)
#define mpi_is_neg(a) ((a)->sign)
/*-- mpiutil.c --*/
#ifdef M_DEBUG
#define mpi_alloc(n) _gcry_mpi_debug_alloc((n), M_DBGINFO( __LINE__ ) )
#define mpi_alloc_secure(n) _gcry_mpi_debug_alloc_secure((n), M_DBGINFO( __LINE__ ) )
#define mpi_free(a) _gcry_mpi_debug_free((a), M_DBGINFO(__LINE__) )
#define mpi_resize(a,b) _gcry_mpi_debug_resize((a),(b), M_DBGINFO(__LINE__) )
#define mpi_copy(a) _gcry_mpi_debug_copy((a), M_DBGINFO(__LINE__) )
gcry_mpi_t _gcry_mpi_debug_alloc( unsigned nlimbs, const char *info );
gcry_mpi_t _gcry_mpi_debug_alloc_secure( unsigned nlimbs, const char *info );
void _gcry_mpi_debug_free( gcry_mpi_t a, const char *info );
void _gcry_mpi_debug_resize( gcry_mpi_t a, unsigned nlimbs, const char *info );
gcry_mpi_t _gcry_mpi_debug_copy( gcry_mpi_t a, const char *info );
#else
#define mpi_alloc(n) _gcry_mpi_alloc((n) )
#define mpi_alloc_secure(n) _gcry_mpi_alloc_secure((n) )
#define mpi_free(a) _gcry_mpi_free((a) )
#define mpi_resize(a,b) _gcry_mpi_resize((a),(b))
#define mpi_copy(a) _gcry_mpi_copy((a))
gcry_mpi_t _gcry_mpi_alloc( unsigned nlimbs );
gcry_mpi_t _gcry_mpi_alloc_secure( unsigned nlimbs );
void _gcry_mpi_free( gcry_mpi_t a );
void _gcry_mpi_resize( gcry_mpi_t a, unsigned nlimbs );
gcry_mpi_t _gcry_mpi_copy( gcry_mpi_t a );
#endif
#define mpi_is_opaque(a) ((a) && ((a)->flags&4))
#define mpi_is_secure(a) ((a) && ((a)->flags&1))
#define mpi_clear(a) _gcry_mpi_clear ((a))
#define mpi_alloc_like(a) _gcry_mpi_alloc_like((a))
#define mpi_set(a,b) _gcry_mpi_set ((a),(b))
#define mpi_set_ui(a,b) _gcry_mpi_set_ui ((a),(b))
#define mpi_alloc_set_ui(a) _gcry_mpi_alloc_set_ui ((a))
#define mpi_m_check(a) _gcry_mpi_m_check ((a))
#define mpi_swap(a,b) _gcry_mpi_swap ((a),(b))
void _gcry_mpi_clear( gcry_mpi_t a );
gcry_mpi_t _gcry_mpi_alloc_like( gcry_mpi_t a );
void _gcry_mpi_set( gcry_mpi_t w, gcry_mpi_t u);
void _gcry_mpi_set_ui( gcry_mpi_t w, ulong u);
gcry_mpi_t _gcry_mpi_alloc_set_ui( unsigned long u);
void _gcry_mpi_m_check( gcry_mpi_t a );
void _gcry_mpi_swap( gcry_mpi_t a, gcry_mpi_t b);
/*-- mpicoder.c --*/
void _gcry_log_mpidump( const char *text, gcry_mpi_t a );
u32 _gcry_mpi_get_keyid( gcry_mpi_t a, u32 *keyid );
byte *_gcry_mpi_get_buffer( gcry_mpi_t a, unsigned *nbytes, int *sign );
byte *_gcry_mpi_get_secure_buffer( gcry_mpi_t a, unsigned *nbytes, int *sign );
void _gcry_mpi_set_buffer( gcry_mpi_t a, const byte *buffer, unsigned nbytes, int sign );
#define log_mpidump _gcry_log_mpidump
/*-- mpi-add.c --*/
#define mpi_add_ui(w,u,v) gcry_mpi_add_ui((w),(u),(v))
#define mpi_add(w,u,v) gcry_mpi_add ((w),(u),(v))
#define mpi_addm(w,u,v,m) gcry_mpi_addm ((w),(u),(v),(m))
#define mpi_sub_ui(w,u,v) gcry_mpi_sub_ui ((w),(u),(v))
#define mpi_sub(w,u,v) gcry_mpi_sub ((w),(u),(v))
#define mpi_subm(w,u,v,m) gcry_mpi_subm ((w),(u),(v),(m))
/*-- mpi-mul.c --*/
#define mpi_mul_ui(w,u,v) gcry_mpi_mul_ui ((w),(u),(v))
#define mpi_mul_2exp(w,u,v) gcry_mpi_mul_2exp ((w),(u),(v))
#define mpi_mul(w,u,v) gcry_mpi_mul ((w),(u),(v))
#define mpi_mulm(w,u,v,m) gcry_mpi_mulm ((w),(u),(v),(m))
/*-- mpi-div.c --*/
#define mpi_fdiv_r_ui(a,b,c) _gcry_mpi_fdiv_r_ui((a),(b),(c))
#define mpi_fdiv_r(a,b,c) _gcry_mpi_fdiv_r((a),(b),(c))
#define mpi_fdiv_q(a,b,c) _gcry_mpi_fdiv_q((a),(b),(c))
#define mpi_fdiv_qr(a,b,c,d) _gcry_mpi_fdiv_qr((a),(b),(c),(d))
#define mpi_tdiv_r(a,b,c) _gcry_mpi_tdiv_r((a),(b),(c))
#define mpi_tdiv_qr(a,b,c,d) _gcry_mpi_tdiv_qr((a),(b),(c),(d))
#define mpi_tdiv_q_2exp(a,b,c) _gcry_mpi_tdiv_q_2exp((a),(b),(c))
#define mpi_divisible_ui(a,b) _gcry_mpi_divisible_ui((a),(b))
ulong _gcry_mpi_fdiv_r_ui( gcry_mpi_t rem, gcry_mpi_t dividend, ulong divisor );
void _gcry_mpi_fdiv_r( gcry_mpi_t rem, gcry_mpi_t dividend, gcry_mpi_t divisor );
void _gcry_mpi_fdiv_q( gcry_mpi_t quot, gcry_mpi_t dividend, gcry_mpi_t divisor );
void _gcry_mpi_fdiv_qr( gcry_mpi_t quot, gcry_mpi_t rem, gcry_mpi_t dividend, gcry_mpi_t divisor );
void _gcry_mpi_tdiv_r( gcry_mpi_t rem, gcry_mpi_t num, gcry_mpi_t den);
void _gcry_mpi_tdiv_qr( gcry_mpi_t quot, gcry_mpi_t rem, gcry_mpi_t num, gcry_mpi_t den);
void _gcry_mpi_tdiv_q_2exp( gcry_mpi_t w, gcry_mpi_t u, unsigned count );
int _gcry_mpi_divisible_ui(gcry_mpi_t dividend, ulong divisor );
/*-- mpi-gcd.c --*/
/*-- mpi-mpow.c --*/
#define mpi_mulpowm(a,b,c,d) _gcry_mpi_mulpowm ((a),(b),(c),(d))
void _gcry_mpi_mulpowm( gcry_mpi_t res, gcry_mpi_t *basearray, gcry_mpi_t *exparray, gcry_mpi_t mod);
/*-- mpi-cmp.c --*/
#define mpi_cmp_ui(a,b) gcry_mpi_cmp_ui ((a),(b))
#define mpi_cmp(a,b) gcry_mpi_cmp ((a),(b))
int gcry_mpi_cmp_ui( gcry_mpi_t u, ulong v );
int gcry_mpi_cmp( gcry_mpi_t u, gcry_mpi_t v );
/*-- mpi-scan.c --*/
#define mpi_trailing_zeros(a) _gcry_mpi_trailing_zeros ((a))
int _gcry_mpi_getbyte( gcry_mpi_t a, unsigned idx );
void _gcry_mpi_putbyte( gcry_mpi_t a, unsigned idx, int value );
unsigned _gcry_mpi_trailing_zeros( gcry_mpi_t a );
/*-- mpi-bit.c --*/
#define mpi_normalize(a) _gcry_mpi_normalize ((a))
#define mpi_get_nbits(a) gcry_mpi_get_nbits ((a))
#define mpi_test_bit(a,b) gcry_mpi_test_bit ((a),(b))
#define mpi_set_bit(a,b) gcry_mpi_set_bit ((a),(b))
#define mpi_set_highbit(a,b) gcry_mpi_set_highbit ((a),(b))
#define mpi_clear_bit(a,b) gcry_mpi_clear_bit ((a),(b))
#define mpi_clear_highbit(a,b) gcry_mpi_clear_highbit ((a),(b))
#define mpi_rshift(a,b,c) gcry_mpi_rshift ((a),(b),(c))
void _gcry_mpi_normalize( gcry_mpi_t a );
/*-- mpi-inv.c --*/
#define mpi_invm(a,b,c) _gcry_mpi_invm ((a),(b),(c))
void _gcry_mpi_invm( gcry_mpi_t x, gcry_mpi_t u, gcry_mpi_t v );
#endif /*G10_MPI_H*/
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