/* SPDX-License-Identifier: GPL-2.0-or-later */ /* 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. * * 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 … #define log_bug … #define assert(x) … /* 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 … #endif /* The code can't handle KARATSUBA_THRESHOLD smaller than 2. */ #if KARATSUBA_THRESHOLD < 2 #undef KARATSUBA_THRESHOLD #define KARATSUBA_THRESHOLD … #endif mpi_ptr_t; /* pointer to a limb */ mpi_size_t; /* (must be a signed type) */ #define RESIZE_IF_NEEDED(a, b) … /* Copy N limbs from S to D. */ #define MPN_COPY(d, s, n) … #define MPN_COPY_INCR(d, s, n) … #define MPN_COPY_DECR(d, s, n) … /* Zero N limbs at D */ #define MPN_ZERO(d, n) … #define MPN_NORMALIZE(d, n) … #define MPN_MUL_N_RECURSE(prodp, up, vp, size, tspace) … /* 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) … /*-- 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); static inline 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); static inline 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); static inline 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); static inline 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); /*-- mpih-cmp.c --*/ int mpihelp_cmp(mpi_ptr_t op1_ptr, mpi_ptr_t op2_ptr, mpi_size_t size); /*-- mpih-mul.c --*/ struct karatsuba_ctx { … }; 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(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); void mpihelp_mul_n(mpi_ptr_t prodp, mpi_ptr_t up, mpi_ptr_t vp, mpi_size_t size); 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); /*-- generic_mpih-mul1.c --*/ 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); /*-- mpih-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); /*-- generic_mpih-[lr]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 … UWtype; UHWtype; #if defined(__GNUC__) UQItype __attribute__ ((mode …)); SItype __attribute__ ((mode …)); USItype __attribute__ ((mode …)); DItype __attribute__ ((mode …)); UDItype __attribute__ ((mode …)); #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 */
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