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b89f57fe5d
* include/types.h (GNUPG_GCC_ATTR_UNUSED): Define for gcc >= 3.5. * mpi/mpih-div.c (mpihelp_divmod_1, mpihelp_mod_1): Mark dummy as unused. * mpi/mpi-internal.h (UDIV_QRNND_PREINV): Mark _ql as unused. -- Due to the use of macros and longlong.h, we use variables which are only used by some architectures. At least gcc 4.7.2 prints new warnings about set but not used variables. This patch silences them.
292 lines
9.4 KiB
C
292 lines
9.4 KiB
C
/* mpi-internal.h - Internal to the Multi Precision Integers
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* Copyright (C) 1994, 1996 Free Software Foundation, Inc.
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* Copyright (C) 1998, 2000 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* Note: This code is heavily based on the GNU MP Library.
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* Actually it's the same code with only minor changes in the
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* way the data is stored; this is to support the abstraction
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* of an optional secure memory allocation which may be used
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* to avoid revealing of sensitive data due to paging etc.
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* The GNU MP Library itself is published under the LGPL;
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* however I decided to publish this code under the plain GPL.
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*/
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#ifndef G10_MPI_INTERNAL_H
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#define G10_MPI_INTERNAL_H
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#include "mpi.h"
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#include "mpi-asm-defs.h"
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#if BYTES_PER_MPI_LIMB == SIZEOF_UNSIGNED_INT
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typedef unsigned int mpi_limb_t;
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typedef signed int mpi_limb_signed_t;
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#elif BYTES_PER_MPI_LIMB == SIZEOF_UNSIGNED_LONG
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typedef unsigned long int mpi_limb_t;
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typedef signed long int mpi_limb_signed_t;
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#elif BYTES_PER_MPI_LIMB == SIZEOF_UNSIGNED_LONG_LONG
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typedef unsigned long long int mpi_limb_t;
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typedef signed long long int mpi_limb_signed_t;
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#elif BYTES_PER_MPI_LIMB == SIZEOF_UNSIGNED_SHORT
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typedef unsigned short int mpi_limb_t;
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typedef signed short int mpi_limb_signed_t;
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#else
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#error BYTES_PER_MPI_LIMB does not match any C type
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#endif
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#define BITS_PER_MPI_LIMB (8*BYTES_PER_MPI_LIMB)
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struct gcry_mpi {
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int alloced; /* array size (# of allocated limbs) */
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int nlimbs; /* number of valid limbs */
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unsigned int nbits; /* the real number of valid bits (info only) */
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int sign; /* indicates a negative number */
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unsigned flags; /* bit 0: array must be allocated in secure memory space */
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/* bit 1: not used */
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/* bit 2: the limb is a pointer to some xmalloced data */
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mpi_limb_t *d; /* array with the limbs */
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};
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/* If KARATSUBA_THRESHOLD is not already defined, define it to a
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* value which is good on most machines. */
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/* tested 4, 16, 32 and 64, where 16 gave the best performance when
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* checking a 768 and a 1024 bit ElGamal signature.
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* (wk 22.12.97) */
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#ifndef KARATSUBA_THRESHOLD
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#define KARATSUBA_THRESHOLD 16
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#endif
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/* The code can't handle KARATSUBA_THRESHOLD smaller than 2. */
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#if KARATSUBA_THRESHOLD < 2
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#undef KARATSUBA_THRESHOLD
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#define KARATSUBA_THRESHOLD 2
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#endif
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typedef mpi_limb_t *mpi_ptr_t; /* pointer to a limb */
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typedef int mpi_size_t; /* (must be a signed type) */
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#define ABS(x) (x >= 0 ? x : -x)
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#define MIN(l,o) ((l) < (o) ? (l) : (o))
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#define MAX(h,i) ((h) > (i) ? (h) : (i))
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#define RESIZE_IF_NEEDED(a,b) \
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do { \
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if( (a)->alloced < (b) ) \
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mpi_resize((a), (b)); \
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} while(0)
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/* Copy N limbs from S to D. */
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#define MPN_COPY( d, s, n) \
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do { \
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mpi_size_t _i; \
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for( _i = 0; _i < (n); _i++ ) \
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(d)[_i] = (s)[_i]; \
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} while(0)
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#define MPN_COPY_INCR( d, s, n) \
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do { \
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mpi_size_t _i; \
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for( _i = 0; _i < (n); _i++ ) \
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(d)[_i] = (s)[_i]; \
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} while (0)
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#define MPN_COPY_DECR( d, s, n ) \
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do { \
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mpi_size_t _i; \
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for( _i = (n)-1; _i >= 0; _i--) \
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(d)[_i] = (s)[_i]; \
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} while(0)
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/* Zero N limbs at D */
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#define MPN_ZERO(d, n) \
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do { \
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int _i; \
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for( _i = 0; _i < (n); _i++ ) \
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(d)[_i] = 0; \
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} while (0)
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#define MPN_NORMALIZE(d, n) \
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do { \
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while( (n) > 0 ) { \
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if( (d)[(n)-1] ) \
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break; \
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(n)--; \
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} \
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} while(0)
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#define MPN_NORMALIZE_NOT_ZERO(d, n) \
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do { \
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for(;;) { \
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if( (d)[(n)-1] ) \
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break; \
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(n)--; \
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} \
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} while(0)
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#define MPN_MUL_N_RECURSE(prodp, up, vp, size, tspace) \
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do { \
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if( (size) < KARATSUBA_THRESHOLD ) \
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mul_n_basecase (prodp, up, vp, size); \
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else \
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mul_n (prodp, up, vp, size, tspace); \
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} while (0);
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/* Divide the two-limb number in (NH,,NL) by D, with DI being the largest
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* limb not larger than (2**(2*BITS_PER_MP_LIMB))/D - (2**BITS_PER_MP_LIMB).
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* If this would yield overflow, DI should be the largest possible number
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* (i.e., only ones). For correct operation, the most significant bit of D
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* has to be set. Put the quotient in Q and the remainder in R.
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*/
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#define UDIV_QRNND_PREINV(q, r, nh, nl, d, di) \
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do { \
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mpi_limb_t _ql GNUPG_GCC_ATTR_UNUSED; \
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mpi_limb_t _q, _r; \
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mpi_limb_t _xh, _xl; \
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umul_ppmm (_q, _ql, (nh), (di)); \
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_q += (nh); /* DI is 2**BITS_PER_MPI_LIMB too small */ \
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umul_ppmm (_xh, _xl, _q, (d)); \
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sub_ddmmss (_xh, _r, (nh), (nl), _xh, _xl); \
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if( _xh ) { \
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sub_ddmmss (_xh, _r, _xh, _r, 0, (d)); \
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_q++; \
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if( _xh) { \
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sub_ddmmss (_xh, _r, _xh, _r, 0, (d)); \
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_q++; \
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} \
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} \
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if( _r >= (d) ) { \
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_r -= (d); \
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_q++; \
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} \
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(r) = _r; \
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(q) = _q; \
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} while (0)
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/*-- mpiutil.c --*/
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#ifdef M_DEBUG
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#define mpi_alloc_limb_space(n,f) mpi_debug_alloc_limb_space((n),(f), M_DBGINFO( __LINE__ ) )
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#define mpi_free_limb_space(n) mpi_debug_free_limb_space((n), M_DBGINFO( __LINE__ ) )
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mpi_ptr_t mpi_debug_alloc_limb_space( unsigned nlimbs, int sec, const char *info );
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void mpi_debug_free_limb_space( mpi_ptr_t a, const char *info );
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#else
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mpi_ptr_t mpi_alloc_limb_space( unsigned nlimbs, int sec );
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void mpi_free_limb_space( mpi_ptr_t a );
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#endif
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void mpi_assign_limb_space( MPI a, mpi_ptr_t ap, unsigned nlimbs );
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/*-- mpi-bit.c --*/
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void mpi_rshift_limbs( MPI a, unsigned int count );
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void mpi_lshift_limbs( MPI a, unsigned int count );
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/*-- mpihelp-add.c --*/
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mpi_limb_t mpihelp_add_1(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
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mpi_size_t s1_size, mpi_limb_t s2_limb );
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mpi_limb_t mpihelp_add_n( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
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mpi_ptr_t s2_ptr, mpi_size_t size);
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mpi_limb_t mpihelp_add(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr, mpi_size_t s1_size,
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mpi_ptr_t s2_ptr, mpi_size_t s2_size);
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/*-- mpihelp-sub.c --*/
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mpi_limb_t mpihelp_sub_1( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
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mpi_size_t s1_size, mpi_limb_t s2_limb );
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mpi_limb_t mpihelp_sub_n( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
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mpi_ptr_t s2_ptr, mpi_size_t size);
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mpi_limb_t mpihelp_sub(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr, mpi_size_t s1_size,
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mpi_ptr_t s2_ptr, mpi_size_t s2_size);
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/*-- mpihelp-cmp.c --*/
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int mpihelp_cmp( mpi_ptr_t op1_ptr, mpi_ptr_t op2_ptr, mpi_size_t size );
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/*-- mpihelp-mul.c --*/
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struct karatsuba_ctx {
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struct karatsuba_ctx *next;
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mpi_ptr_t tspace;
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mpi_size_t tspace_size;
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mpi_ptr_t tp;
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mpi_size_t tp_size;
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};
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void mpihelp_release_karatsuba_ctx( struct karatsuba_ctx *ctx );
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mpi_limb_t mpihelp_addmul_1( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
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mpi_size_t s1_size, mpi_limb_t s2_limb);
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mpi_limb_t mpihelp_submul_1( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
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mpi_size_t s1_size, mpi_limb_t s2_limb);
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void mpihelp_mul_n( mpi_ptr_t prodp, mpi_ptr_t up, mpi_ptr_t vp,
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mpi_size_t size);
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mpi_limb_t mpihelp_mul( mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t usize,
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mpi_ptr_t vp, mpi_size_t vsize);
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void mpih_sqr_n_basecase( mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t size );
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void mpih_sqr_n( mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t size,
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mpi_ptr_t tspace);
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void mpihelp_mul_karatsuba_case( mpi_ptr_t prodp,
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mpi_ptr_t up, mpi_size_t usize,
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mpi_ptr_t vp, mpi_size_t vsize,
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struct karatsuba_ctx *ctx );
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/*-- mpihelp-mul_1.c (or xxx/cpu/ *.S) --*/
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mpi_limb_t mpihelp_mul_1( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
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mpi_size_t s1_size, mpi_limb_t s2_limb);
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/*-- mpihelp-div.c --*/
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mpi_limb_t mpihelp_mod_1(mpi_ptr_t dividend_ptr, mpi_size_t dividend_size,
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mpi_limb_t divisor_limb);
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mpi_limb_t mpihelp_divrem( mpi_ptr_t qp, mpi_size_t qextra_limbs,
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mpi_ptr_t np, mpi_size_t nsize,
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mpi_ptr_t dp, mpi_size_t dsize);
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mpi_limb_t mpihelp_divmod_1( mpi_ptr_t quot_ptr,
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mpi_ptr_t dividend_ptr, mpi_size_t dividend_size,
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mpi_limb_t divisor_limb);
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/*-- mpihelp-shift.c --*/
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mpi_limb_t mpihelp_lshift( mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize,
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unsigned cnt);
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mpi_limb_t mpihelp_rshift( mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize,
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unsigned cnt);
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/* Define stuff for longlong.h. */
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#define W_TYPE_SIZE BITS_PER_MPI_LIMB
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typedef mpi_limb_t UWtype;
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typedef unsigned int UHWtype;
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#if defined (__GNUC__)
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typedef unsigned int UQItype __attribute__ ((mode (QI)));
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typedef int SItype __attribute__ ((mode (SI)));
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typedef unsigned int USItype __attribute__ ((mode (SI)));
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typedef int DItype __attribute__ ((mode (DI)));
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typedef unsigned int UDItype __attribute__ ((mode (DI)));
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#else
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typedef unsigned char UQItype;
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typedef long SItype;
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typedef unsigned long USItype;
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#endif
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#ifdef __GNUC__
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#include "mpi-inline.h"
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#endif
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#endif /*G10_MPI_INTERNAL_H*/
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