mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 23:06:41 +07:00
5ce3e312ec
Adds the multi-precision-integer maths library which was originally taken from GnuPG and ported to the kernel by (among others) David Howells. This version is taken from Fedora kernel 2.6.32-71.14.1.el6. The difference is that checkpatch reported errors and warnings have been fixed. This library is used to implemenet RSA digital signature verification used in IMA/EVM integrity protection subsystem. Due to patch size limitation, the patch is divided into 4 parts. Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
262 lines
7.9 KiB
C
262 lines
7.9 KiB
C
/* mpi-internal.h - Internal to the Multi Precision Integers
|
|
* Copyright (C) 1994, 1996 Free Software Foundation, Inc.
|
|
* Copyright (C) 1998, 2000 Free Software Foundation, Inc.
|
|
*
|
|
* This file is part of GnuPG.
|
|
*
|
|
* GnuPG is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* GnuPG is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
|
|
*
|
|
* 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_INTERNAL_H
|
|
#define G10_MPI_INTERNAL_H
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/string.h>
|
|
#include <linux/mpi.h>
|
|
#include <linux/errno.h>
|
|
|
|
#define log_debug printk
|
|
#define log_bug printk
|
|
|
|
#define assert(x) \
|
|
do { \
|
|
if (!x) \
|
|
log_bug("failed assertion\n"); \
|
|
} while (0);
|
|
|
|
/* If KARATSUBA_THRESHOLD is not already defined, define it to a
|
|
* value which is good on most machines. */
|
|
|
|
/* tested 4, 16, 32 and 64, where 16 gave the best performance when
|
|
* checking a 768 and a 1024 bit ElGamal signature.
|
|
* (wk 22.12.97) */
|
|
#ifndef KARATSUBA_THRESHOLD
|
|
#define KARATSUBA_THRESHOLD 16
|
|
#endif
|
|
|
|
/* The code can't handle KARATSUBA_THRESHOLD smaller than 2. */
|
|
#if KARATSUBA_THRESHOLD < 2
|
|
#undef KARATSUBA_THRESHOLD
|
|
#define KARATSUBA_THRESHOLD 2
|
|
#endif
|
|
|
|
typedef mpi_limb_t *mpi_ptr_t; /* pointer to a limb */
|
|
typedef int mpi_size_t; /* (must be a signed type) */
|
|
|
|
#define ABS(x) (x >= 0 ? x : -x)
|
|
#define MIN(l, o) ((l) < (o) ? (l) : (o))
|
|
#define MAX(h, i) ((h) > (i) ? (h) : (i))
|
|
|
|
static inline int RESIZE_IF_NEEDED(MPI a, unsigned b)
|
|
{
|
|
if (a->alloced < b)
|
|
return mpi_resize(a, b);
|
|
return 0;
|
|
}
|
|
|
|
/* Copy N limbs from S to D. */
|
|
#define MPN_COPY(d, s, n) \
|
|
do { \
|
|
mpi_size_t _i; \
|
|
for (_i = 0; _i < (n); _i++) \
|
|
(d)[_i] = (s)[_i]; \
|
|
} while (0)
|
|
|
|
#define MPN_COPY_INCR(d, s, n) \
|
|
do { \
|
|
mpi_size_t _i; \
|
|
for (_i = 0; _i < (n); _i++) \
|
|
(d)[_i] = (d)[_i]; \
|
|
} while (0)
|
|
|
|
#define MPN_COPY_DECR(d, s, n) \
|
|
do { \
|
|
mpi_size_t _i; \
|
|
for (_i = (n)-1; _i >= 0; _i--) \
|
|
(d)[_i] = (s)[_i]; \
|
|
} while (0)
|
|
|
|
/* Zero N limbs at D */
|
|
#define MPN_ZERO(d, n) \
|
|
do { \
|
|
int _i; \
|
|
for (_i = 0; _i < (n); _i++) \
|
|
(d)[_i] = 0; \
|
|
} while (0)
|
|
|
|
#define MPN_NORMALIZE(d, n) \
|
|
do { \
|
|
while ((n) > 0) { \
|
|
if ((d)[(n)-1]) \
|
|
break; \
|
|
(n)--; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define MPN_NORMALIZE_NOT_ZERO(d, n) \
|
|
do { \
|
|
for (;;) { \
|
|
if ((d)[(n)-1]) \
|
|
break; \
|
|
(n)--; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define MPN_MUL_N_RECURSE(prodp, up, vp, size, tspace) \
|
|
do { \
|
|
if ((size) < KARATSUBA_THRESHOLD) \
|
|
mul_n_basecase(prodp, up, vp, size); \
|
|
else \
|
|
mul_n(prodp, up, vp, size, tspace); \
|
|
} while (0);
|
|
|
|
/* Divide the two-limb number in (NH,,NL) by D, with DI being the largest
|
|
* limb not larger than (2**(2*BITS_PER_MP_LIMB))/D - (2**BITS_PER_MP_LIMB).
|
|
* If this would yield overflow, DI should be the largest possible number
|
|
* (i.e., only ones). For correct operation, the most significant bit of D
|
|
* has to be set. Put the quotient in Q and the remainder in R.
|
|
*/
|
|
#define UDIV_QRNND_PREINV(q, r, nh, nl, d, di) \
|
|
do { \
|
|
mpi_limb_t _q, _ql, _r; \
|
|
mpi_limb_t _xh, _xl; \
|
|
umul_ppmm(_q, _ql, (nh), (di)); \
|
|
_q += (nh); /* DI is 2**BITS_PER_MPI_LIMB too small */ \
|
|
umul_ppmm(_xh, _xl, _q, (d)); \
|
|
sub_ddmmss(_xh, _r, (nh), (nl), _xh, _xl); \
|
|
if (_xh) { \
|
|
sub_ddmmss(_xh, _r, _xh, _r, 0, (d)); \
|
|
_q++; \
|
|
if (_xh) { \
|
|
sub_ddmmss(_xh, _r, _xh, _r, 0, (d)); \
|
|
_q++; \
|
|
} \
|
|
} \
|
|
if (_r >= (d)) { \
|
|
_r -= (d); \
|
|
_q++; \
|
|
} \
|
|
(r) = _r; \
|
|
(q) = _q; \
|
|
} while (0)
|
|
|
|
/*-- mpiutil.c --*/
|
|
mpi_ptr_t mpi_alloc_limb_space(unsigned nlimbs);
|
|
void mpi_free_limb_space(mpi_ptr_t a);
|
|
void mpi_assign_limb_space(MPI a, mpi_ptr_t ap, unsigned nlimbs);
|
|
|
|
/*-- mpi-bit.c --*/
|
|
void mpi_rshift_limbs(MPI a, unsigned int count);
|
|
int mpi_lshift_limbs(MPI a, unsigned int count);
|
|
|
|
/*-- mpihelp-add.c --*/
|
|
mpi_limb_t mpihelp_add_1(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
|
|
mpi_size_t s1_size, mpi_limb_t s2_limb);
|
|
mpi_limb_t mpihelp_add_n(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
|
|
mpi_ptr_t s2_ptr, mpi_size_t size);
|
|
mpi_limb_t mpihelp_add(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr, mpi_size_t s1_size,
|
|
mpi_ptr_t s2_ptr, mpi_size_t s2_size);
|
|
|
|
/*-- mpihelp-sub.c --*/
|
|
mpi_limb_t mpihelp_sub_1(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
|
|
mpi_size_t s1_size, mpi_limb_t s2_limb);
|
|
mpi_limb_t mpihelp_sub_n(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
|
|
mpi_ptr_t s2_ptr, mpi_size_t size);
|
|
mpi_limb_t mpihelp_sub(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr, mpi_size_t s1_size,
|
|
mpi_ptr_t s2_ptr, mpi_size_t s2_size);
|
|
|
|
/*-- mpihelp-cmp.c --*/
|
|
int mpihelp_cmp(mpi_ptr_t op1_ptr, mpi_ptr_t op2_ptr, mpi_size_t size);
|
|
|
|
/*-- mpihelp-mul.c --*/
|
|
|
|
struct karatsuba_ctx {
|
|
struct karatsuba_ctx *next;
|
|
mpi_ptr_t tspace;
|
|
mpi_size_t tspace_size;
|
|
mpi_ptr_t tp;
|
|
mpi_size_t tp_size;
|
|
};
|
|
|
|
void mpihelp_release_karatsuba_ctx(struct karatsuba_ctx *ctx);
|
|
|
|
mpi_limb_t mpihelp_addmul_1(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
|
|
mpi_size_t s1_size, mpi_limb_t s2_limb);
|
|
mpi_limb_t mpihelp_submul_1(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
|
|
mpi_size_t s1_size, mpi_limb_t s2_limb);
|
|
int mpihelp_mul_n(mpi_ptr_t prodp, mpi_ptr_t up, mpi_ptr_t vp, mpi_size_t size);
|
|
int mpihelp_mul(mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t usize,
|
|
mpi_ptr_t vp, mpi_size_t vsize, mpi_limb_t *_result);
|
|
void mpih_sqr_n_basecase(mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t size);
|
|
void mpih_sqr_n(mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t size,
|
|
mpi_ptr_t tspace);
|
|
|
|
int mpihelp_mul_karatsuba_case(mpi_ptr_t prodp,
|
|
mpi_ptr_t up, mpi_size_t usize,
|
|
mpi_ptr_t vp, mpi_size_t vsize,
|
|
struct karatsuba_ctx *ctx);
|
|
|
|
/*-- mpihelp-mul_1.c (or xxx/cpu/ *.S) --*/
|
|
mpi_limb_t mpihelp_mul_1(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
|
|
mpi_size_t s1_size, mpi_limb_t s2_limb);
|
|
|
|
/*-- mpihelp-div.c --*/
|
|
mpi_limb_t mpihelp_mod_1(mpi_ptr_t dividend_ptr, mpi_size_t dividend_size,
|
|
mpi_limb_t divisor_limb);
|
|
mpi_limb_t mpihelp_divrem(mpi_ptr_t qp, mpi_size_t qextra_limbs,
|
|
mpi_ptr_t np, mpi_size_t nsize,
|
|
mpi_ptr_t dp, mpi_size_t dsize);
|
|
mpi_limb_t mpihelp_divmod_1(mpi_ptr_t quot_ptr,
|
|
mpi_ptr_t dividend_ptr, mpi_size_t dividend_size,
|
|
mpi_limb_t divisor_limb);
|
|
|
|
/*-- mpihelp-shift.c --*/
|
|
mpi_limb_t mpihelp_lshift(mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize,
|
|
unsigned cnt);
|
|
mpi_limb_t mpihelp_rshift(mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize,
|
|
unsigned cnt);
|
|
|
|
/* Define stuff for longlong.h. */
|
|
#define W_TYPE_SIZE BITS_PER_MPI_LIMB
|
|
typedef mpi_limb_t UWtype;
|
|
typedef unsigned int UHWtype;
|
|
#if defined(__GNUC__)
|
|
typedef unsigned int UQItype __attribute__ ((mode(QI)));
|
|
typedef int SItype __attribute__ ((mode(SI)));
|
|
typedef unsigned int USItype __attribute__ ((mode(SI)));
|
|
typedef int DItype __attribute__ ((mode(DI)));
|
|
typedef unsigned int UDItype __attribute__ ((mode(DI)));
|
|
#else
|
|
typedef unsigned char UQItype;
|
|
typedef long SItype;
|
|
typedef unsigned long USItype;
|
|
#endif
|
|
|
|
#ifdef __GNUC__
|
|
#include "mpi-inline.h"
|
|
#endif
|
|
|
|
#endif /*G10_MPI_INTERNAL_H */
|