From bedbef8ad3e75a304af6361af235302bcc61d06b Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 14 May 2024 06:39:01 +0000
Subject: [PATCH] 修改内核路径
---
kernel/include/linux/mpi.h | 210 +++++++++++++++++++++++++++++++++++++++++++++++++---
1 files changed, 196 insertions(+), 14 deletions(-)
diff --git a/kernel/include/linux/mpi.h b/kernel/include/linux/mpi.h
index 7cd1473..3e5358f 100644
--- a/kernel/include/linux/mpi.h
+++ b/kernel/include/linux/mpi.h
@@ -1,22 +1,9 @@
+/* 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.
- *
- * 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
@@ -53,21 +40,79 @@
typedef struct gcry_mpi *MPI;
#define mpi_get_nlimbs(a) ((a)->nlimbs)
+#define mpi_has_sign(a) ((a)->sign)
/*-- mpiutil.c --*/
MPI mpi_alloc(unsigned nlimbs);
+void mpi_clear(MPI a);
void mpi_free(MPI a);
int mpi_resize(MPI a, unsigned nlimbs);
+static inline MPI mpi_new(unsigned int nbits)
+{
+ return mpi_alloc((nbits + BITS_PER_MPI_LIMB - 1) / BITS_PER_MPI_LIMB);
+}
+
+MPI mpi_copy(MPI a);
+MPI mpi_alloc_like(MPI a);
+void mpi_snatch(MPI w, MPI u);
+MPI mpi_set(MPI w, MPI u);
+MPI mpi_set_ui(MPI w, unsigned long u);
+MPI mpi_alloc_set_ui(unsigned long u);
+void mpi_swap_cond(MPI a, MPI b, unsigned long swap);
+
+/* Constants used to return constant MPIs. See mpi_init if you
+ * want to add more constants.
+ */
+#define MPI_NUMBER_OF_CONSTANTS 6
+enum gcry_mpi_constants {
+ MPI_C_ZERO,
+ MPI_C_ONE,
+ MPI_C_TWO,
+ MPI_C_THREE,
+ MPI_C_FOUR,
+ MPI_C_EIGHT
+};
+
+MPI mpi_const(enum gcry_mpi_constants no);
+
/*-- mpicoder.c --*/
+
+/* Different formats of external big integer representation. */
+enum gcry_mpi_format {
+ GCRYMPI_FMT_NONE = 0,
+ GCRYMPI_FMT_STD = 1, /* Twos complement stored without length. */
+ GCRYMPI_FMT_PGP = 2, /* As used by OpenPGP (unsigned only). */
+ GCRYMPI_FMT_SSH = 3, /* As used by SSH (like STD but with length). */
+ GCRYMPI_FMT_HEX = 4, /* Hex format. */
+ GCRYMPI_FMT_USG = 5, /* Like STD but unsigned. */
+ GCRYMPI_FMT_OPAQUE = 8 /* Opaque format (some functions only). */
+};
+
MPI mpi_read_raw_data(const void *xbuffer, size_t nbytes);
MPI mpi_read_from_buffer(const void *buffer, unsigned *ret_nread);
+int mpi_fromstr(MPI val, const char *str);
+MPI mpi_scanval(const char *string);
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);
+int mpi_print(enum gcry_mpi_format format, unsigned char *buffer,
+ size_t buflen, size_t *nwritten, MPI a);
+
+/*-- mpi-mod.c --*/
+void mpi_mod(MPI rem, MPI dividend, MPI divisor);
+
+/* Context used with Barrett reduction. */
+struct barrett_ctx_s;
+typedef struct barrett_ctx_s *mpi_barrett_t;
+
+mpi_barrett_t mpi_barrett_init(MPI m, int copy);
+void mpi_barrett_free(mpi_barrett_t ctx);
+void mpi_mod_barrett(MPI r, MPI x, mpi_barrett_t ctx);
+void mpi_mul_barrett(MPI w, MPI u, MPI v, mpi_barrett_t ctx);
/*-- mpi-pow.c --*/
int mpi_powm(MPI res, MPI base, MPI exp, MPI mod);
@@ -75,10 +120,147 @@
/*-- mpi-cmp.c --*/
int mpi_cmp_ui(MPI u, ulong v);
int mpi_cmp(MPI u, MPI v);
+int mpi_cmpabs(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);
+void mpi_set_bit(MPI a, unsigned int n);
+void mpi_set_highbit(MPI a, unsigned int n);
+void mpi_clear_highbit(MPI a, unsigned int n);
+void mpi_clear_bit(MPI a, unsigned int n);
+void mpi_rshift_limbs(MPI a, unsigned int count);
+void mpi_rshift(MPI x, MPI a, unsigned int n);
+void mpi_lshift_limbs(MPI a, unsigned int count);
+void mpi_lshift(MPI x, MPI a, unsigned int n);
+
+/*-- mpi-add.c --*/
+void mpi_add_ui(MPI w, MPI u, unsigned long v);
+void mpi_add(MPI w, MPI u, MPI v);
+void mpi_sub(MPI w, MPI u, MPI v);
+void mpi_addm(MPI w, MPI u, MPI v, MPI m);
+void mpi_subm(MPI w, MPI u, MPI v, MPI m);
+
+/*-- mpi-mul.c --*/
+void mpi_mul(MPI w, MPI u, MPI v);
+void mpi_mulm(MPI w, MPI u, MPI v, MPI m);
+
+/*-- mpi-div.c --*/
+void mpi_tdiv_r(MPI rem, MPI num, MPI den);
+void mpi_fdiv_r(MPI rem, MPI dividend, MPI divisor);
+void mpi_fdiv_q(MPI quot, MPI dividend, MPI divisor);
+
+/*-- mpi-inv.c --*/
+int mpi_invm(MPI x, MPI a, MPI n);
+
+/*-- ec.c --*/
+
+/* Object to represent a point in projective coordinates */
+struct gcry_mpi_point {
+ MPI x;
+ MPI y;
+ MPI z;
+};
+
+typedef struct gcry_mpi_point *MPI_POINT;
+
+/* Models describing an elliptic curve */
+enum gcry_mpi_ec_models {
+ /* The Short Weierstrass equation is
+ * y^2 = x^3 + ax + b
+ */
+ MPI_EC_WEIERSTRASS = 0,
+ /* The Montgomery equation is
+ * by^2 = x^3 + ax^2 + x
+ */
+ MPI_EC_MONTGOMERY,
+ /* The Twisted Edwards equation is
+ * ax^2 + y^2 = 1 + bx^2y^2
+ * Note that we use 'b' instead of the commonly used 'd'.
+ */
+ MPI_EC_EDWARDS
+};
+
+/* Dialects used with elliptic curves */
+enum ecc_dialects {
+ ECC_DIALECT_STANDARD = 0,
+ ECC_DIALECT_ED25519,
+ ECC_DIALECT_SAFECURVE
+};
+
+/* This context is used with all our EC functions. */
+struct mpi_ec_ctx {
+ enum gcry_mpi_ec_models model; /* The model describing this curve. */
+ enum ecc_dialects dialect; /* The ECC dialect used with the curve. */
+ int flags; /* Public key flags (not always used). */
+ unsigned int nbits; /* Number of bits. */
+
+ /* Domain parameters. Note that they may not all be set and if set
+ * the MPIs may be flaged as constant.
+ */
+ MPI p; /* Prime specifying the field GF(p). */
+ MPI a; /* First coefficient of the Weierstrass equation. */
+ MPI b; /* Second coefficient of the Weierstrass equation. */
+ MPI_POINT G; /* Base point (generator). */
+ MPI n; /* Order of G. */
+ unsigned int h; /* Cofactor. */
+
+ /* The actual key. May not be set. */
+ MPI_POINT Q; /* Public key. */
+ MPI d; /* Private key. */
+
+ const char *name; /* Name of the curve. */
+
+ /* This structure is private to mpi/ec.c! */
+ struct {
+ struct {
+ unsigned int a_is_pminus3:1;
+ unsigned int two_inv_p:1;
+ } valid; /* Flags to help setting the helper vars below. */
+
+ int a_is_pminus3; /* True if A = P - 3. */
+
+ MPI two_inv_p;
+
+ mpi_barrett_t p_barrett;
+
+ /* Scratch variables. */
+ MPI scratch[11];
+
+ /* Helper for fast reduction. */
+ /* int nist_nbits; /\* If this is a NIST curve, the # of bits. *\/ */
+ /* MPI s[10]; */
+ /* MPI c; */
+ } t;
+
+ /* Curve specific computation routines for the field. */
+ void (*addm)(MPI w, MPI u, MPI v, struct mpi_ec_ctx *ctx);
+ void (*subm)(MPI w, MPI u, MPI v, struct mpi_ec_ctx *ec);
+ void (*mulm)(MPI w, MPI u, MPI v, struct mpi_ec_ctx *ctx);
+ void (*pow2)(MPI w, const MPI b, struct mpi_ec_ctx *ctx);
+ void (*mul2)(MPI w, MPI u, struct mpi_ec_ctx *ctx);
+};
+
+void mpi_ec_init(struct mpi_ec_ctx *ctx, enum gcry_mpi_ec_models model,
+ enum ecc_dialects dialect,
+ int flags, MPI p, MPI a, MPI b);
+void mpi_ec_deinit(struct mpi_ec_ctx *ctx);
+MPI_POINT mpi_point_new(unsigned int nbits);
+void mpi_point_release(MPI_POINT p);
+void mpi_point_init(MPI_POINT p);
+void mpi_point_free_parts(MPI_POINT p);
+int mpi_ec_get_affine(MPI x, MPI y, MPI_POINT point, struct mpi_ec_ctx *ctx);
+void mpi_ec_add_points(MPI_POINT result,
+ MPI_POINT p1, MPI_POINT p2,
+ struct mpi_ec_ctx *ctx);
+void mpi_ec_mul_point(MPI_POINT result,
+ MPI scalar, MPI_POINT point,
+ struct mpi_ec_ctx *ctx);
+int mpi_ec_curve_point(MPI_POINT point, struct mpi_ec_ctx *ctx);
/* inline functions */
--
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