Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109/* SPDX-License-Identifier: GPL-2.0-or-later *//* mpi.h - Multi Precision Integers * Copyright (C) 1994, 1996, 1998, 1999, * 2000, 2001 Free Software Foundation, Inc. * * This file is part of GNUPG. * * 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. * The GNU MP Library itself is published under the LGPL; * however I decided to publish this code under the plain GPL. */
#ifndef G10_MPI_H#define G10_MPI_H
#include <linux/types.h>#include <linux/scatterlist.h>
#define BYTES_PER_MPI_LIMB (BITS_PER_LONG / 8)#define BITS_PER_MPI_LIMB BITS_PER_LONG
typedef unsigned long int mpi_limb_t;typedef signed long int mpi_limb_signed_t;
struct gcry_mpi { int alloced; /* array size (# of allocated limbs) */ int nlimbs; /* number of valid limbs */ int nbits; /* the real number of valid bits (info only) */ int sign; /* indicates a negative number */ unsigned flags; /* bit 0: array must be allocated in secure memory space */ /* bit 1: not used */ /* bit 2: the limb is a pointer to some m_alloced data */ mpi_limb_t *d; /* array with the limbs */};
typedef struct gcry_mpi *MPI;
#define mpi_get_nlimbs(a) ((a)->nlimbs)
/*-- mpiutil.c --*/MPI mpi_alloc(unsigned nlimbs);void mpi_free(MPI a);int mpi_resize(MPI a, unsigned nlimbs);
MPI mpi_copy(MPI a);
/*-- mpicoder.c --*/MPI mpi_read_raw_data(const void *xbuffer, size_t nbytes);MPI mpi_read_from_buffer(const void *buffer, unsigned *ret_nread);MPI mpi_read_raw_from_sgl(struct scatterlist *sgl, unsigned int len);void *mpi_get_buffer(MPI a, unsigned *nbytes, int *sign);int mpi_read_buffer(MPI a, uint8_t *buf, unsigned buf_len, unsigned *nbytes, int *sign);int mpi_write_to_sgl(MPI a, struct scatterlist *sg, unsigned nbytes, int *sign);
/*-- mpi-mod.c --*/int mpi_mod(MPI rem, MPI dividend, MPI divisor);
/*-- mpi-pow.c --*/int mpi_powm(MPI res, MPI base, MPI exp, MPI mod);
/*-- mpi-cmp.c --*/int mpi_cmp_ui(MPI u, ulong v);int mpi_cmp(MPI u, MPI v);
/*-- mpi-sub-ui.c --*/int mpi_sub_ui(MPI w, MPI u, unsigned long vval);
/*-- mpi-bit.c --*/void mpi_normalize(MPI a);unsigned mpi_get_nbits(MPI a);int mpi_test_bit(MPI a, unsigned int n);int mpi_set_bit(MPI a, unsigned int n);int mpi_rshift(MPI x, MPI a, unsigned int n);
/*-- mpi-add.c --*/int mpi_add(MPI w, MPI u, MPI v);int mpi_sub(MPI w, MPI u, MPI v);int mpi_addm(MPI w, MPI u, MPI v, MPI m);int mpi_subm(MPI w, MPI u, MPI v, MPI m);
/*-- mpi-mul.c --*/int mpi_mul(MPI w, MPI u, MPI v);int mpi_mulm(MPI w, MPI u, MPI v, MPI m);
/*-- mpi-div.c --*/int mpi_tdiv_r(MPI rem, MPI num, MPI den);int mpi_fdiv_r(MPI rem, MPI dividend, MPI divisor);
/* inline functions */
/** * mpi_get_size() - returns max size required to store the number * * @a: A multi precision integer for which we want to allocate a buffer * * Return: size required to store the number */static inline unsigned int mpi_get_size(MPI a){ return a->nlimbs * BYTES_PER_MPI_LIMB;}#endif /*G10_MPI_H */