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TOMOYO Linux Cross Reference
Linux/include/linux/mpi.h

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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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