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198 lines
6.9 KiB
C
198 lines
6.9 KiB
C
/* mpi.h - Multi Precision Integers
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* Copyright (C) 1994, 1996, 1998, 1999,
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* 2000, 2001 Free Software Foundation, Inc.
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*
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* This file is part of GNUPG.
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*
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* GNUPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GNUPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*
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* Note: This code is heavily based on the GNU MP Library.
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* Actually it's the same code with only minor changes in the
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* way the data is stored; this is to support the abstraction
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* of an optional secure memory allocation which may be used
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* to avoid revealing of sensitive data due to paging etc.
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* The GNU MP Library itself is published under the LGPL;
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* however I decided to publish this code under the plain GPL.
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*/
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#ifndef G10_MPI_H
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#define G10_MPI_H
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#include <config.h>
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#include <stdio.h>
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#include "iobuf.h"
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#include "types.h"
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#include "memory.h"
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#if BYTES_PER_MPI_LIMB == SIZEOF_UNSIGNED_INT
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typedef unsigned int mpi_limb_t;
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typedef signed int mpi_limb_signed_t;
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#elif BYTES_PER_MPI_LIMB == SIZEOF_UNSIGNED_LONG
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typedef unsigned long int mpi_limb_t;
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typedef signed long int mpi_limb_signed_t;
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#elif BYTES_PER_MPI_LIMB == SIZEOF_UNSIGNED_LONG_LONG
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typedef unsigned long long int mpi_limb_t;
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typedef signed long long int mpi_limb_signed_t;
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#elif BYTES_PER_MPI_LIMB == SIZEOF_UNSIGNED_SHORT
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typedef unsigned short int mpi_limb_t;
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typedef signed short int mpi_limb_signed_t;
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#else
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#error BYTES_PER_MPI_LIMB does not match any C type
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#endif
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#define BITS_PER_MPI_LIMB (8*BYTES_PER_MPI_LIMB)
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#ifndef EXTERN_UNLESS_MAIN_MODULE
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#if defined (__riscos__) && !defined (INCLUDED_BY_MAIN_MODULE)
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#define EXTERN_UNLESS_MAIN_MODULE extern
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#else
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#define EXTERN_UNLESS_MAIN_MODULE
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#endif
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#endif
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#define DBG_MPI mpi_debug_mode
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EXTERN_UNLESS_MAIN_MODULE int mpi_debug_mode;
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struct gcry_mpi {
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int alloced; /* array size (# of allocated limbs) */
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int nlimbs; /* number of valid limbs */
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unsigned int nbits; /* the real number of valid bits (info only) */
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int sign; /* indicates a negative number */
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unsigned flags; /* bit 0: array must be allocated in secure memory space */
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/* bit 1: not used */
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/* bit 2: the limb is a pointer to some xmalloced data */
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mpi_limb_t *d; /* array with the limbs */
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};
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typedef struct gcry_mpi *MPI;
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#define MPI_NULL NULL
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#define mpi_get_nlimbs(a) ((a)->nlimbs)
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#define mpi_is_neg(a) ((a)->sign)
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/*-- mpiutil.c --*/
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#ifdef M_DEBUG
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#define mpi_alloc(n) mpi_debug_alloc((n), M_DBGINFO( __LINE__ ) )
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#define mpi_alloc_secure(n) mpi_debug_alloc_secure((n), M_DBGINFO( __LINE__ ) )
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#define mpi_alloc_like(n) mpi_debug_alloc_like((n), M_DBGINFO( __LINE__ ) )
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#define mpi_free(a) mpi_debug_free((a), M_DBGINFO(__LINE__) )
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#define mpi_resize(a,b) mpi_debug_resize((a),(b), M_DBGINFO(__LINE__) )
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#define mpi_copy(a) mpi_debug_copy((a), M_DBGINFO(__LINE__) )
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MPI mpi_debug_alloc( unsigned nlimbs, const char *info );
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MPI mpi_debug_alloc_secure( unsigned nlimbs, const char *info );
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MPI mpi_debug_alloc_like( MPI a, const char *info );
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void mpi_debug_free( MPI a, const char *info );
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void mpi_debug_resize( MPI a, unsigned nlimbs, const char *info );
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MPI mpi_debug_copy( MPI a, const char *info );
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#else
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MPI mpi_alloc( unsigned nlimbs );
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MPI mpi_alloc_secure( unsigned nlimbs );
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MPI mpi_alloc_like( MPI a );
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void mpi_free( MPI a );
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void mpi_resize( MPI a, unsigned nlimbs );
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MPI mpi_copy( MPI a );
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#endif
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#define mpi_is_opaque(a) ((a) && ((a)->flags&4))
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MPI mpi_set_opaque( MPI a, void *p, unsigned int len );
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void *mpi_get_opaque( MPI a, unsigned int *len );
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#define mpi_is_secure(a) ((a) && ((a)->flags&1))
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void mpi_set_secure( MPI a );
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void mpi_clear( MPI a );
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void mpi_set( MPI w, MPI u);
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void mpi_set_ui( MPI w, ulong u);
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MPI mpi_alloc_set_ui( unsigned long u);
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void mpi_m_check( MPI a );
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void mpi_swap( MPI a, MPI b);
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/*-- mpicoder.c --*/
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int mpi_write( IOBUF out, MPI a );
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#ifdef M_DEBUG
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#define mpi_read(a,b,c) mpi_debug_read((a),(b),(c), M_DBGINFO( __LINE__ ) )
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MPI mpi_debug_read(IOBUF inp, unsigned *nread, int secure, const char *info);
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#else
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MPI mpi_read(IOBUF inp, unsigned *nread, int secure);
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#endif
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MPI mpi_read_from_buffer(byte *buffer, unsigned *ret_nread, int secure);
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int mpi_fromstr(MPI val, const char *str);
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int mpi_print( FILE *fp, MPI a, int mode );
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void g10_log_mpidump( const char *text, MPI a );
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u32 mpi_get_keyid( MPI a, u32 *keyid );
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byte *mpi_get_buffer( MPI a, unsigned *nbytes, int *sign );
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byte *mpi_get_secure_buffer( MPI a, unsigned *nbytes, int *sign );
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void mpi_set_buffer( MPI a, const byte *buffer, unsigned nbytes, int sign );
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#define log_mpidump g10_log_mpidump
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/*-- mpi-add.c --*/
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void mpi_add_ui(MPI w, MPI u, ulong v );
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void mpi_add(MPI w, MPI u, MPI v);
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void mpi_addm(MPI w, MPI u, MPI v, MPI m);
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void mpi_sub_ui(MPI w, MPI u, ulong v );
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void mpi_sub( MPI w, MPI u, MPI v);
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void mpi_subm( MPI w, MPI u, MPI v, MPI m);
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/*-- mpi-mul.c --*/
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void mpi_mul_ui(MPI w, MPI u, ulong v );
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void mpi_mul_2exp( MPI w, MPI u, ulong cnt);
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void mpi_mul( MPI w, MPI u, MPI v);
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void mpi_mulm( MPI w, MPI u, MPI v, MPI m);
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/*-- mpi-div.c --*/
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ulong mpi_fdiv_r_ui( MPI rem, MPI dividend, ulong divisor );
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void mpi_fdiv_r( MPI rem, MPI dividend, MPI divisor );
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void mpi_fdiv_q( MPI quot, MPI dividend, MPI divisor );
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void mpi_fdiv_qr( MPI quot, MPI rem, MPI dividend, MPI divisor );
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void mpi_tdiv_r( MPI rem, MPI num, MPI den);
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void mpi_tdiv_qr( MPI quot, MPI rem, MPI num, MPI den);
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void mpi_tdiv_q_2exp( MPI w, MPI u, unsigned count );
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int mpi_divisible_ui(MPI dividend, ulong divisor );
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/*-- mpi-gcd.c --*/
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int mpi_gcd( MPI g, MPI a, MPI b );
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/*-- mpi-pow.c --*/
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void mpi_pow( MPI w, MPI u, MPI v);
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void mpi_powm( MPI res, MPI base, MPI exponent, MPI mod);
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/*-- mpi-mpow.c --*/
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void mpi_mulpowm( MPI res, MPI *basearray, MPI *exparray, MPI mod);
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/*-- mpi-cmp.c --*/
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int mpi_cmp_ui( MPI u, ulong v );
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int mpi_cmp( MPI u, MPI v );
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/*-- mpi-scan.c --*/
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int mpi_getbyte( MPI a, unsigned idx );
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void mpi_putbyte( MPI a, unsigned idx, int value );
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unsigned mpi_trailing_zeros( MPI a );
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/*-- mpi-bit.c --*/
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void mpi_normalize( MPI a );
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unsigned mpi_get_nbits( MPI a );
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int mpi_test_bit( MPI a, unsigned n );
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void mpi_set_bit( MPI a, unsigned n );
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void mpi_set_highbit( MPI a, unsigned n );
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void mpi_clear_highbit( MPI a, unsigned n );
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void mpi_clear_bit( MPI a, unsigned n );
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void mpi_rshift( MPI x, MPI a, unsigned n );
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/*-- mpi-inv.c --*/
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void mpi_invm( MPI x, MPI u, MPI v );
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#endif /*G10_MPI_H*/
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