1 /* mpi.h - Multi Precision Integers
2 * Copyright (C) 1994, 1996, 1998, 1999,
3 * 2000, 2001 Free Software Foundation, Inc.
5 * This file is part of GNUPG.
7 * GNUPG is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * GNUPG is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
21 * Note: This code is heavily based on the GNU MP Library.
22 * Actually it's the same code with only minor changes in the
23 * way the data is stored; this is to support the abstraction
24 * of an optional secure memory allocation which may be used
25 * to avoid revealing of sensitive data due to paging etc.
26 * The GNU MP Library itself is published under the LGPL;
27 * however I decided to publish this code under the plain GPL.
33 #include <linux/types.h>
37 #define SHA1_DIGEST_LENGTH 20
39 /*end of DSI defines */
41 #define BYTES_PER_MPI_LIMB (BITS_PER_LONG / 8)
42 #define BITS_PER_MPI_LIMB BITS_PER_LONG
44 typedef unsigned long int mpi_limb_t
;
45 typedef signed long int mpi_limb_signed_t
;
48 int alloced
; /* array size (# of allocated limbs) */
49 int nlimbs
; /* number of valid limbs */
50 int nbits
; /* the real number of valid bits (info only) */
51 int sign
; /* indicates a negative number */
52 unsigned flags
; /* bit 0: array must be allocated in secure memory space */
54 /* bit 2: the limb is a pointer to some m_alloced data */
55 mpi_limb_t
*d
; /* array with the limbs */
58 typedef struct gcry_mpi
*MPI
;
60 #define mpi_get_nlimbs(a) ((a)->nlimbs)
61 #define mpi_is_neg(a) ((a)->sign)
64 MPI
mpi_alloc(unsigned nlimbs
);
65 MPI
mpi_alloc_secure(unsigned nlimbs
);
66 MPI
mpi_alloc_like(MPI a
);
68 int mpi_resize(MPI a
, unsigned nlimbs
);
69 int mpi_copy(MPI
*copy
, const MPI a
);
70 void mpi_clear(MPI a
);
71 int mpi_set(MPI w
, MPI u
);
72 int mpi_set_ui(MPI w
, ulong u
);
73 MPI
mpi_alloc_set_ui(unsigned long u
);
74 void mpi_m_check(MPI a
);
75 void mpi_swap(MPI a
, MPI b
);
78 MPI
do_encode_md(const void *sha_buffer
, unsigned nbits
);
79 MPI
mpi_read_from_buffer(const void *buffer
, unsigned *ret_nread
);
80 int mpi_fromstr(MPI val
, const char *str
);
81 u32
mpi_get_keyid(MPI a
, u32
*keyid
);
82 void *mpi_get_buffer(MPI a
, unsigned *nbytes
, int *sign
);
83 void *mpi_get_secure_buffer(MPI a
, unsigned *nbytes
, int *sign
);
84 int mpi_set_buffer(MPI a
, const void *buffer
, unsigned nbytes
, int sign
);
86 #define log_mpidump g10_log_mpidump
89 int mpi_add_ui(MPI w
, MPI u
, ulong v
);
90 int mpi_add(MPI w
, MPI u
, MPI v
);
91 int mpi_addm(MPI w
, MPI u
, MPI v
, MPI m
);
92 int mpi_sub_ui(MPI w
, MPI u
, ulong v
);
93 int mpi_sub(MPI w
, MPI u
, MPI v
);
94 int mpi_subm(MPI w
, MPI u
, MPI v
, MPI m
);
97 int mpi_mul_ui(MPI w
, MPI u
, ulong v
);
98 int mpi_mul_2exp(MPI w
, MPI u
, ulong cnt
);
99 int mpi_mul(MPI w
, MPI u
, MPI v
);
100 int mpi_mulm(MPI w
, MPI u
, MPI v
, MPI m
);
103 ulong
mpi_fdiv_r_ui(MPI rem
, MPI dividend
, ulong divisor
);
104 int mpi_fdiv_r(MPI rem
, MPI dividend
, MPI divisor
);
105 int mpi_fdiv_q(MPI quot
, MPI dividend
, MPI divisor
);
106 int mpi_fdiv_qr(MPI quot
, MPI rem
, MPI dividend
, MPI divisor
);
107 int mpi_tdiv_r(MPI rem
, MPI num
, MPI den
);
108 int mpi_tdiv_qr(MPI quot
, MPI rem
, MPI num
, MPI den
);
109 int mpi_tdiv_q_2exp(MPI w
, MPI u
, unsigned count
);
110 int mpi_divisible_ui(const MPI dividend
, ulong divisor
);
113 int mpi_gcd(MPI g
, const MPI a
, const MPI b
);
116 int mpi_pow(MPI w
, MPI u
, MPI v
);
117 int mpi_powm(MPI res
, MPI base
, MPI exp
, MPI mod
);
120 int mpi_mulpowm(MPI res
, MPI
*basearray
, MPI
*exparray
, MPI mod
);
123 int mpi_cmp_ui(MPI u
, ulong v
);
124 int mpi_cmp(MPI u
, MPI v
);
127 int mpi_getbyte(MPI a
, unsigned idx
);
128 void mpi_putbyte(MPI a
, unsigned idx
, int value
);
129 unsigned mpi_trailing_zeros(MPI a
);
132 void mpi_normalize(MPI a
);
133 unsigned mpi_get_nbits(MPI a
);
134 int mpi_test_bit(MPI a
, unsigned n
);
135 int mpi_set_bit(MPI a
, unsigned n
);
136 int mpi_set_highbit(MPI a
, unsigned n
);
137 void mpi_clear_highbit(MPI a
, unsigned n
);
138 void mpi_clear_bit(MPI a
, unsigned n
);
139 int mpi_rshift(MPI x
, MPI a
, unsigned n
);
142 int mpi_invm(MPI x
, MPI u
, MPI v
);
144 #endif /*G10_MPI_H */
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