mirror of
https://github.com/rn10950/RetroZilla.git
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44b7f056d9
bug1001332, 56b691c003ad, bug1086145, bug1054069, bug1155922, bug991783, bug1125025, bug1162521, bug1162644, bug1132941, bug1164364, bug1166205, bug1166163, bug1166515, bug1138554, bug1167046, bug1167043, bug1169451, bug1172128, bug1170322, bug102794, bug1128184, bug557830, bug1174648, bug1180244, bug1177784, bug1173413, bug1169174, bug1084669, bug951455, bug1183395, bug1177430, bug1183827, bug1160139, bug1154106, bug1142209, bug1185033, bug1193467, bug1182667(with sha512 changes backed out, which breaks VC6 compilation), bug1158489, bug337796
249 lines
10 KiB
C
249 lines
10 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __ecl_priv_h_
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#define __ecl_priv_h_
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#include "ecl.h"
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#include "mpi.h"
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#include "mplogic.h"
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/* MAX_FIELD_SIZE_DIGITS is the maximum size of field element supported */
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/* the following needs to go away... */
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#if defined(MP_USE_LONG_LONG_DIGIT) || defined(MP_USE_LONG_DIGIT)
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#define ECL_SIXTY_FOUR_BIT
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#else
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#define ECL_THIRTY_TWO_BIT
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#endif
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#define ECL_CURVE_DIGITS(curve_size_in_bits) \
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(((curve_size_in_bits)+(sizeof(mp_digit)*8-1))/(sizeof(mp_digit)*8))
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#define ECL_BITS (sizeof(mp_digit)*8)
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#define ECL_MAX_FIELD_SIZE_DIGITS (80/sizeof(mp_digit))
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/* Gets the i'th bit in the binary representation of a. If i >= length(a),
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* then return 0. (The above behaviour differs from mpl_get_bit, which
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* causes an error if i >= length(a).) */
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#define MP_GET_BIT(a, i) \
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((i) >= mpl_significant_bits((a))) ? 0 : mpl_get_bit((a), (i))
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#if !defined(MP_NO_MP_WORD) && !defined(MP_NO_ADD_WORD)
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#define MP_ADD_CARRY(a1, a2, s, carry) \
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{ mp_word w; \
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w = ((mp_word)carry) + (a1) + (a2); \
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s = ACCUM(w); \
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carry = CARRYOUT(w); }
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#define MP_SUB_BORROW(a1, a2, s, borrow) \
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{ mp_word w; \
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w = ((mp_word)(a1)) - (a2) - borrow; \
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s = ACCUM(w); \
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borrow = (w >> MP_DIGIT_BIT) & 1; }
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#else
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/* NOTE,
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* carry and borrow are both read and written.
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* a1 or a2 and s could be the same variable.
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* don't trash those outputs until their respective inputs have
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* been read. */
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#define MP_ADD_CARRY(a1, a2, s, carry) \
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{ mp_digit tmp,sum; \
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tmp = (a1); \
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sum = tmp + (a2); \
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tmp = (sum < tmp); /* detect overflow */ \
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s = sum += carry; \
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carry = tmp + (sum < carry); }
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#define MP_SUB_BORROW(a1, a2, s, borrow) \
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{ mp_digit tmp; \
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tmp = (a1); \
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s = tmp - (a2); \
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tmp = (s > tmp); /* detect borrow */ \
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if (borrow && !s--) tmp++; \
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borrow = tmp; }
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#endif
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struct GFMethodStr;
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typedef struct GFMethodStr GFMethod;
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struct GFMethodStr {
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/* Indicates whether the structure was constructed from dynamic memory
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* or statically created. */
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int constructed;
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/* Irreducible that defines the field. For prime fields, this is the
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* prime p. For binary polynomial fields, this is the bitstring
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* representation of the irreducible polynomial. */
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mp_int irr;
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/* For prime fields, the value irr_arr[0] is the number of bits in the
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* field. For binary polynomial fields, the irreducible polynomial
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* f(t) is represented as an array of unsigned int[], where f(t) is
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* of the form: f(t) = t^p[0] + t^p[1] + ... + t^p[4] where m = p[0]
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* > p[1] > ... > p[4] = 0. */
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unsigned int irr_arr[5];
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/* Field arithmetic methods. All methods (except field_enc and
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* field_dec) are assumed to take field-encoded parameters and return
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* field-encoded values. All methods (except field_enc and field_dec)
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* are required to be implemented. */
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mp_err (*field_add) (const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err (*field_neg) (const mp_int *a, mp_int *r, const GFMethod *meth);
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mp_err (*field_sub) (const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err (*field_mod) (const mp_int *a, mp_int *r, const GFMethod *meth);
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mp_err (*field_mul) (const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err (*field_sqr) (const mp_int *a, mp_int *r, const GFMethod *meth);
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mp_err (*field_div) (const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err (*field_enc) (const mp_int *a, mp_int *r, const GFMethod *meth);
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mp_err (*field_dec) (const mp_int *a, mp_int *r, const GFMethod *meth);
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/* Extra storage for implementation-specific data. Any memory
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* allocated to these extra fields will be cleared by extra_free. */
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void *extra1;
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void *extra2;
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void (*extra_free) (GFMethod *meth);
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};
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/* Construct generic GFMethods. */
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GFMethod *GFMethod_consGFp(const mp_int *irr);
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GFMethod *GFMethod_consGFp_mont(const mp_int *irr);
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GFMethod *GFMethod_consGF2m(const mp_int *irr,
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const unsigned int irr_arr[5]);
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/* Free the memory allocated (if any) to a GFMethod object. */
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void GFMethod_free(GFMethod *meth);
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struct ECGroupStr {
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/* Indicates whether the structure was constructed from dynamic memory
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* or statically created. */
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int constructed;
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/* Field definition and arithmetic. */
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GFMethod *meth;
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/* Textual representation of curve name, if any. */
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char *text;
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/* Curve parameters, field-encoded. */
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mp_int curvea, curveb;
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/* x and y coordinates of the base point, field-encoded. */
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mp_int genx, geny;
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/* Order and cofactor of the base point. */
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mp_int order;
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int cofactor;
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/* Point arithmetic methods. All methods are assumed to take
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* field-encoded parameters and return field-encoded values. All
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* methods (except base_point_mul and points_mul) are required to be
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* implemented. */
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mp_err (*point_add) (const mp_int *px, const mp_int *py,
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const mp_int *qx, const mp_int *qy, mp_int *rx,
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mp_int *ry, const ECGroup *group);
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mp_err (*point_sub) (const mp_int *px, const mp_int *py,
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const mp_int *qx, const mp_int *qy, mp_int *rx,
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mp_int *ry, const ECGroup *group);
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mp_err (*point_dbl) (const mp_int *px, const mp_int *py, mp_int *rx,
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mp_int *ry, const ECGroup *group);
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mp_err (*point_mul) (const mp_int *n, const mp_int *px,
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const mp_int *py, mp_int *rx, mp_int *ry,
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const ECGroup *group);
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mp_err (*base_point_mul) (const mp_int *n, mp_int *rx, mp_int *ry,
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const ECGroup *group);
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mp_err (*points_mul) (const mp_int *k1, const mp_int *k2,
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const mp_int *px, const mp_int *py, mp_int *rx,
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mp_int *ry, const ECGroup *group);
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mp_err (*validate_point) (const mp_int *px, const mp_int *py, const ECGroup *group);
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/* Extra storage for implementation-specific data. Any memory
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* allocated to these extra fields will be cleared by extra_free. */
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void *extra1;
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void *extra2;
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void (*extra_free) (ECGroup *group);
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};
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/* Wrapper functions for generic prime field arithmetic. */
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mp_err ec_GFp_add(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err ec_GFp_neg(const mp_int *a, mp_int *r, const GFMethod *meth);
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mp_err ec_GFp_sub(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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/* fixed length in-line adds. Count is in words */
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mp_err ec_GFp_add_3(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err ec_GFp_add_4(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err ec_GFp_add_5(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err ec_GFp_add_6(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err ec_GFp_sub_3(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err ec_GFp_sub_4(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err ec_GFp_sub_5(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err ec_GFp_sub_6(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err ec_GFp_mod(const mp_int *a, mp_int *r, const GFMethod *meth);
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mp_err ec_GFp_mul(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err ec_GFp_sqr(const mp_int *a, mp_int *r, const GFMethod *meth);
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mp_err ec_GFp_div(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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/* Wrapper functions for generic binary polynomial field arithmetic. */
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mp_err ec_GF2m_add(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err ec_GF2m_neg(const mp_int *a, mp_int *r, const GFMethod *meth);
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mp_err ec_GF2m_mod(const mp_int *a, mp_int *r, const GFMethod *meth);
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mp_err ec_GF2m_mul(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err ec_GF2m_sqr(const mp_int *a, mp_int *r, const GFMethod *meth);
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mp_err ec_GF2m_div(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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/* Montgomery prime field arithmetic. */
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mp_err ec_GFp_mul_mont(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err ec_GFp_sqr_mont(const mp_int *a, mp_int *r, const GFMethod *meth);
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mp_err ec_GFp_div_mont(const mp_int *a, const mp_int *b, mp_int *r,
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const GFMethod *meth);
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mp_err ec_GFp_enc_mont(const mp_int *a, mp_int *r, const GFMethod *meth);
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mp_err ec_GFp_dec_mont(const mp_int *a, mp_int *r, const GFMethod *meth);
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void ec_GFp_extra_free_mont(GFMethod *meth);
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/* point multiplication */
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mp_err ec_pts_mul_basic(const mp_int *k1, const mp_int *k2,
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const mp_int *px, const mp_int *py, mp_int *rx,
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mp_int *ry, const ECGroup *group);
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mp_err ec_pts_mul_simul_w2(const mp_int *k1, const mp_int *k2,
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const mp_int *px, const mp_int *py, mp_int *rx,
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mp_int *ry, const ECGroup *group);
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/* Computes the windowed non-adjacent-form (NAF) of a scalar. Out should
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* be an array of signed char's to output to, bitsize should be the number
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* of bits of out, in is the original scalar, and w is the window size.
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* NAF is discussed in the paper: D. Hankerson, J. Hernandez and A.
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* Menezes, "Software implementation of elliptic curve cryptography over
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* binary fields", Proc. CHES 2000. */
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mp_err ec_compute_wNAF(signed char *out, int bitsize, const mp_int *in,
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int w);
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/* Optimized field arithmetic */
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mp_err ec_group_set_gfp192(ECGroup *group, ECCurveName);
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mp_err ec_group_set_gfp224(ECGroup *group, ECCurveName);
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mp_err ec_group_set_gfp256(ECGroup *group, ECCurveName);
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mp_err ec_group_set_gfp384(ECGroup *group, ECCurveName);
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mp_err ec_group_set_gfp521(ECGroup *group, ECCurveName);
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mp_err ec_group_set_gf2m163(ECGroup *group, ECCurveName name);
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mp_err ec_group_set_gf2m193(ECGroup *group, ECCurveName name);
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mp_err ec_group_set_gf2m233(ECGroup *group, ECCurveName name);
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/* Optimized point multiplication */
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mp_err ec_group_set_gfp256_32(ECGroup *group, ECCurveName name);
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/* Optimized floating-point arithmetic */
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#ifdef ECL_USE_FP
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mp_err ec_group_set_secp160r1_fp(ECGroup *group);
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mp_err ec_group_set_nistp192_fp(ECGroup *group);
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mp_err ec_group_set_nistp224_fp(ECGroup *group);
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#endif
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#endif /* __ecl_priv_h_ */
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