forked from Minki/linux
crypto: GnuPG based MPI lib - header files (part 2)
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>
This commit is contained in:
Dmitry Kasatkin
parent
cdec9cb516
commit
5ce3e312ec
146
include/linux/mpi.h
Normal file
146
include/linux/mpi.h
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@ -0,0 +1,146 @@
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/* mpi.h - Multi Precision Integers
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* Copyright (C) 1994, 1996, 1998, 1999,
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* 2000, 2001 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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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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_H
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#define G10_MPI_H
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#include <linux/types.h>
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/* DSI defines */
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#define SHA1_DIGEST_LENGTH 20
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/*end of DSI defines */
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#define BYTES_PER_MPI_LIMB (BITS_PER_LONG / 8)
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#define BITS_PER_MPI_LIMB BITS_PER_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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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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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 m_alloced data */
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mpi_limb_t *d; /* array with the limbs */
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};
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typedef struct gcry_mpi *MPI;
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#define MPI_NULL NULL
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#define mpi_get_nlimbs(a) ((a)->nlimbs)
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#define mpi_is_neg(a) ((a)->sign)
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/*-- mpiutil.c --*/
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MPI mpi_alloc(unsigned nlimbs);
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MPI mpi_alloc_secure(unsigned nlimbs);
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MPI mpi_alloc_like(MPI a);
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void mpi_free(MPI a);
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int mpi_resize(MPI a, unsigned nlimbs);
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int mpi_copy(MPI *copy, const MPI a);
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void mpi_clear(MPI a);
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int mpi_set(MPI w, MPI u);
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int mpi_set_ui(MPI w, ulong u);
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MPI mpi_alloc_set_ui(unsigned long u);
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void mpi_m_check(MPI a);
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void mpi_swap(MPI a, MPI b);
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/*-- mpicoder.c --*/
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MPI do_encode_md(const void *sha_buffer, unsigned nbits);
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MPI mpi_read_from_buffer(const void *buffer, unsigned *ret_nread);
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int mpi_fromstr(MPI val, const char *str);
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u32 mpi_get_keyid(MPI a, u32 *keyid);
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void *mpi_get_buffer(MPI a, unsigned *nbytes, int *sign);
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void *mpi_get_secure_buffer(MPI a, unsigned *nbytes, int *sign);
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int mpi_set_buffer(MPI a, const void *buffer, unsigned nbytes, int sign);
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#define log_mpidump g10_log_mpidump
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/*-- mpi-add.c --*/
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int mpi_add_ui(MPI w, MPI u, ulong v);
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int mpi_add(MPI w, MPI u, MPI v);
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int mpi_addm(MPI w, MPI u, MPI v, MPI m);
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int mpi_sub_ui(MPI w, MPI u, ulong v);
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int mpi_sub(MPI w, MPI u, MPI v);
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int mpi_subm(MPI w, MPI u, MPI v, MPI m);
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/*-- mpi-mul.c --*/
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int mpi_mul_ui(MPI w, MPI u, ulong v);
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int mpi_mul_2exp(MPI w, MPI u, ulong cnt);
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int mpi_mul(MPI w, MPI u, MPI v);
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int mpi_mulm(MPI w, MPI u, MPI v, MPI m);
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/*-- mpi-div.c --*/
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ulong mpi_fdiv_r_ui(MPI rem, MPI dividend, ulong divisor);
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int mpi_fdiv_r(MPI rem, MPI dividend, MPI divisor);
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int mpi_fdiv_q(MPI quot, MPI dividend, MPI divisor);
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int mpi_fdiv_qr(MPI quot, MPI rem, MPI dividend, MPI divisor);
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int mpi_tdiv_r(MPI rem, MPI num, MPI den);
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int mpi_tdiv_qr(MPI quot, MPI rem, MPI num, MPI den);
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int mpi_tdiv_q_2exp(MPI w, MPI u, unsigned count);
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int mpi_divisible_ui(const MPI dividend, ulong divisor);
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/*-- mpi-gcd.c --*/
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int mpi_gcd(MPI g, const MPI a, const MPI b);
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/*-- mpi-pow.c --*/
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int mpi_pow(MPI w, MPI u, MPI v);
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int mpi_powm(MPI res, MPI base, MPI exp, MPI mod);
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/*-- mpi-mpow.c --*/
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int mpi_mulpowm(MPI res, MPI *basearray, MPI *exparray, MPI mod);
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/*-- mpi-cmp.c --*/
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int mpi_cmp_ui(MPI u, ulong v);
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int mpi_cmp(MPI u, MPI v);
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/*-- mpi-scan.c --*/
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int mpi_getbyte(MPI a, unsigned idx);
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void mpi_putbyte(MPI a, unsigned idx, int value);
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unsigned mpi_trailing_zeros(MPI a);
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/*-- mpi-bit.c --*/
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void mpi_normalize(MPI a);
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unsigned mpi_get_nbits(MPI a);
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int mpi_test_bit(MPI a, unsigned n);
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int mpi_set_bit(MPI a, unsigned n);
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int mpi_set_highbit(MPI a, unsigned n);
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void mpi_clear_highbit(MPI a, unsigned n);
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void mpi_clear_bit(MPI a, unsigned n);
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int mpi_rshift(MPI x, MPI a, unsigned n);
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/*-- mpi-inv.c --*/
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int mpi_invm(MPI x, MPI u, MPI v);
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#endif /*G10_MPI_H */
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1478
lib/mpi/longlong.h
Normal file
1478
lib/mpi/longlong.h
Normal file
File diff suppressed because it is too large
Load Diff
122
lib/mpi/mpi-inline.h
Normal file
122
lib/mpi/mpi-inline.h
Normal file
@ -0,0 +1,122 @@
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/* mpi-inline.h - Internal to the Multi Precision Integers
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* Copyright (C) 1994, 1996, 1998, 1999 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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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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_INLINE_H
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#define G10_MPI_INLINE_H
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#ifndef G10_MPI_INLINE_DECL
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#define G10_MPI_INLINE_DECL extern inline
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#endif
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G10_MPI_INLINE_DECL mpi_limb_t
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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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{
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mpi_limb_t x;
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x = *s1_ptr++;
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s2_limb += x;
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*res_ptr++ = s2_limb;
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if (s2_limb < x) { /* sum is less than the left operand: handle carry */
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while (--s1_size) {
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x = *s1_ptr++ + 1; /* add carry */
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*res_ptr++ = x; /* and store */
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if (x) /* not 0 (no overflow): we can stop */
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goto leave;
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}
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return 1; /* return carry (size of s1 to small) */
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}
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leave:
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if (res_ptr != s1_ptr) { /* not the same variable */
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mpi_size_t i; /* copy the rest */
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for (i = 0; i < s1_size - 1; i++)
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res_ptr[i] = s1_ptr[i];
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}
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return 0; /* no carry */
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}
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G10_MPI_INLINE_DECL mpi_limb_t
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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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{
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mpi_limb_t cy = 0;
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if (s2_size)
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cy = mpihelp_add_n(res_ptr, s1_ptr, s2_ptr, s2_size);
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if (s1_size - s2_size)
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cy = mpihelp_add_1(res_ptr + s2_size, s1_ptr + s2_size,
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s1_size - s2_size, cy);
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return cy;
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}
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G10_MPI_INLINE_DECL mpi_limb_t
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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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{
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mpi_limb_t x;
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x = *s1_ptr++;
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s2_limb = x - s2_limb;
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*res_ptr++ = s2_limb;
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if (s2_limb > x) {
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while (--s1_size) {
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x = *s1_ptr++;
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*res_ptr++ = x - 1;
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if (x)
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goto leave;
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}
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return 1;
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}
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leave:
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if (res_ptr != s1_ptr) {
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mpi_size_t i;
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for (i = 0; i < s1_size - 1; i++)
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res_ptr[i] = s1_ptr[i];
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}
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return 0;
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}
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G10_MPI_INLINE_DECL mpi_limb_t
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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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{
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mpi_limb_t cy = 0;
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if (s2_size)
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cy = mpihelp_sub_n(res_ptr, s1_ptr, s2_ptr, s2_size);
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if (s1_size - s2_size)
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cy = mpihelp_sub_1(res_ptr + s2_size, s1_ptr + s2_size,
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s1_size - s2_size, cy);
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return cy;
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}
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#endif /*G10_MPI_INLINE_H */
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261
lib/mpi/mpi-internal.h
Normal file
261
lib/mpi/mpi-internal.h
Normal file
@ -0,0 +1,261 @@
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/* 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 2 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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*
|
||||
* 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
|
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*
|
||||
* 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;
|
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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 <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/mpi.h>
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#include <linux/errno.h>
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#define log_debug printk
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#define log_bug printk
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#define assert(x) \
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do { \
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if (!x) \
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log_bug("failed assertion\n"); \
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} while (0);
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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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static inline int RESIZE_IF_NEEDED(MPI a, unsigned b)
|
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{
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if (a->alloced < b)
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return mpi_resize(a, b);
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return 0;
|
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}
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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] = (d)[_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);
|
||||
|
||||
/* 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).
|
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* 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) \
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||||
do { \
|
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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 */
|
||||
Loading…
Reference in New Issue
Block a user