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1 | /* mpi.h - Multi Precision Integers |
2 | * Copyright (C) 1994, 1996, 1998, 1999, |
3 | * 2000, 2001 Free Software Foundation, Inc. |
4 | * |
5 | * This file is part of GNUPG. |
6 | * |
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. |
11 | * |
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. |
16 | * |
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 |
20 | * |
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. |
28 | */ |
29 | |
30 | #ifndef G10_MPI_H |
31 | #define G10_MPI_H |
32 | |
33 | #include <linux/types.h> |
34 | |
35 | /* DSI defines */ |
36 | |
37 | #define SHA1_DIGEST_LENGTH 20 |
38 | |
39 | /*end of DSI defines */ |
40 | |
41 | #define BYTES_PER_MPI_LIMB (BITS_PER_LONG / 8) |
42 | #define BITS_PER_MPI_LIMB BITS_PER_LONG |
43 | |
44 | typedef unsigned long int mpi_limb_t; |
45 | typedef signed long int mpi_limb_signed_t; |
46 | |
47 | struct gcry_mpi { |
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 */ |
53 | /* bit 1: not used */ |
54 | /* bit 2: the limb is a pointer to some m_alloced data */ |
55 | mpi_limb_t *d; /* array with the limbs */ |
56 | }; |
57 | |
58 | typedef struct gcry_mpi *MPI; |
59 | |
60 | #define mpi_get_nlimbs(a) ((a)->nlimbs) |
61 | #define mpi_is_neg(a) ((a)->sign) |
62 | |
63 | /*-- mpiutil.c --*/ |
64 | MPI mpi_alloc(unsigned nlimbs); |
65 | MPI mpi_alloc_secure(unsigned nlimbs); |
66 | MPI mpi_alloc_like(MPI a); |
67 | void mpi_free(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); |
76 | |
77 | /*-- mpicoder.c --*/ |
78 | MPI do_encode_md(const void *sha_buffer, unsigned nbits); |
79 | MPI mpi_read_raw_data(const void *xbuffer, size_t nbytes); |
80 | MPI mpi_read_from_buffer(const void *buffer, unsigned *ret_nread); |
81 | int mpi_fromstr(MPI val, const char *str); |
82 | u32 mpi_get_keyid(MPI a, u32 *keyid); |
83 | void *mpi_get_buffer(MPI a, unsigned *nbytes, int *sign); |
84 | void *mpi_get_secure_buffer(MPI a, unsigned *nbytes, int *sign); |
85 | int mpi_set_buffer(MPI a, const void *buffer, unsigned nbytes, int sign); |
86 | |
87 | #define log_mpidump g10_log_mpidump |
88 | |
89 | /*-- mpi-add.c --*/ |
90 | int mpi_add_ui(MPI w, MPI u, ulong v); |
91 | int mpi_add(MPI w, MPI u, MPI v); |
92 | int mpi_addm(MPI w, MPI u, MPI v, MPI m); |
93 | int mpi_sub_ui(MPI w, MPI u, ulong v); |
94 | int mpi_sub(MPI w, MPI u, MPI v); |
95 | int mpi_subm(MPI w, MPI u, MPI v, MPI m); |
96 | |
97 | /*-- mpi-mul.c --*/ |
98 | int mpi_mul_ui(MPI w, MPI u, ulong v); |
99 | int mpi_mul_2exp(MPI w, MPI u, ulong cnt); |
100 | int mpi_mul(MPI w, MPI u, MPI v); |
101 | int mpi_mulm(MPI w, MPI u, MPI v, MPI m); |
102 | |
103 | /*-- mpi-div.c --*/ |
104 | ulong mpi_fdiv_r_ui(MPI rem, MPI dividend, ulong divisor); |
105 | int mpi_fdiv_r(MPI rem, MPI dividend, MPI divisor); |
106 | int mpi_fdiv_q(MPI quot, MPI dividend, MPI divisor); |
107 | int mpi_fdiv_qr(MPI quot, MPI rem, MPI dividend, MPI divisor); |
108 | int mpi_tdiv_r(MPI rem, MPI num, MPI den); |
109 | int mpi_tdiv_qr(MPI quot, MPI rem, MPI num, MPI den); |
110 | int mpi_tdiv_q_2exp(MPI w, MPI u, unsigned count); |
111 | int mpi_divisible_ui(const MPI dividend, ulong divisor); |
112 | |
113 | /*-- mpi-gcd.c --*/ |
114 | int mpi_gcd(MPI g, const MPI a, const MPI b); |
115 | |
116 | /*-- mpi-pow.c --*/ |
117 | int mpi_pow(MPI w, MPI u, MPI v); |
118 | int mpi_powm(MPI res, MPI base, MPI exp, MPI mod); |
119 | |
120 | /*-- mpi-mpow.c --*/ |
121 | int mpi_mulpowm(MPI res, MPI *basearray, MPI *exparray, MPI mod); |
122 | |
123 | /*-- mpi-cmp.c --*/ |
124 | int mpi_cmp_ui(MPI u, ulong v); |
125 | int mpi_cmp(MPI u, MPI v); |
126 | |
127 | /*-- mpi-scan.c --*/ |
128 | int mpi_getbyte(MPI a, unsigned idx); |
129 | void mpi_putbyte(MPI a, unsigned idx, int value); |
130 | unsigned mpi_trailing_zeros(MPI a); |
131 | |
132 | /*-- mpi-bit.c --*/ |
133 | void mpi_normalize(MPI a); |
134 | unsigned mpi_get_nbits(MPI a); |
135 | int mpi_test_bit(MPI a, unsigned n); |
136 | int mpi_set_bit(MPI a, unsigned n); |
137 | int mpi_set_highbit(MPI a, unsigned n); |
138 | void mpi_clear_highbit(MPI a, unsigned n); |
139 | void mpi_clear_bit(MPI a, unsigned n); |
140 | int mpi_rshift(MPI x, MPI a, unsigned n); |
141 | |
142 | /*-- mpi-inv.c --*/ |
143 | int mpi_invm(MPI x, MPI u, MPI v); |
144 | |
145 | #endif /*G10_MPI_H */ |
146 |
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