mirror of
https://github.com/rn10950/RetroZilla.git
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93 lines
3.8 KiB
C
93 lines
3.8 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 __ec2_h_
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#define __ec2_h_
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#include "ecl-priv.h"
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/* Checks if point P(px, py) is at infinity. Uses affine coordinates. */
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mp_err ec_GF2m_pt_is_inf_aff(const mp_int *px, const mp_int *py);
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/* Sets P(px, py) to be the point at infinity. Uses affine coordinates. */
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mp_err ec_GF2m_pt_set_inf_aff(mp_int *px, mp_int *py);
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/* Computes R = P + Q where R is (rx, ry), P is (px, py) and Q is (qx,
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* qy). Uses affine coordinates. */
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mp_err ec_GF2m_pt_add_aff(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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/* Computes R = P - Q. Uses affine coordinates. */
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mp_err ec_GF2m_pt_sub_aff(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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/* Computes R = 2P. Uses affine coordinates. */
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mp_err ec_GF2m_pt_dbl_aff(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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/* Validates a point on a GF2m curve. */
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mp_err ec_GF2m_validate_point(const mp_int *px, const mp_int *py, const ECGroup *group);
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/* by default, this routine is unused and thus doesn't need to be compiled */
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#ifdef ECL_ENABLE_GF2M_PT_MUL_AFF
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/* Computes R = nP where R is (rx, ry) and P is (px, py). The parameters
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* a, b and p are the elliptic curve coefficients and the irreducible that
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* determines the field GF2m. Uses affine coordinates. */
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mp_err ec_GF2m_pt_mul_aff(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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#endif
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/* Computes R = nP where R is (rx, ry) and P is (px, py). The parameters
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* a, b and p are the elliptic curve coefficients and the irreducible that
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* determines the field GF2m. Uses Montgomery projective coordinates. */
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mp_err ec_GF2m_pt_mul_mont(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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#ifdef ECL_ENABLE_GF2M_PROJ
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/* Converts a point P(px, py) from affine coordinates to projective
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* coordinates R(rx, ry, rz). */
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mp_err ec_GF2m_pt_aff2proj(const mp_int *px, const mp_int *py, mp_int *rx,
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mp_int *ry, mp_int *rz, const ECGroup *group);
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/* Converts a point P(px, py, pz) from projective coordinates to affine
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* coordinates R(rx, ry). */
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mp_err ec_GF2m_pt_proj2aff(const mp_int *px, const mp_int *py,
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const mp_int *pz, mp_int *rx, mp_int *ry,
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const ECGroup *group);
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/* Checks if point P(px, py, pz) is at infinity. Uses projective
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* coordinates. */
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mp_err ec_GF2m_pt_is_inf_proj(const mp_int *px, const mp_int *py,
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const mp_int *pz);
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/* Sets P(px, py, pz) to be the point at infinity. Uses projective
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* coordinates. */
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mp_err ec_GF2m_pt_set_inf_proj(mp_int *px, mp_int *py, mp_int *pz);
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/* Computes R = P + Q where R is (rx, ry, rz), P is (px, py, pz) and Q is
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* (qx, qy, qz). Uses projective coordinates. */
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mp_err ec_GF2m_pt_add_proj(const mp_int *px, const mp_int *py,
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const mp_int *pz, const mp_int *qx,
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const mp_int *qy, mp_int *rx, mp_int *ry,
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mp_int *rz, const ECGroup *group);
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/* Computes R = 2P. Uses projective coordinates. */
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mp_err ec_GF2m_pt_dbl_proj(const mp_int *px, const mp_int *py,
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const mp_int *pz, mp_int *rx, mp_int *ry,
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mp_int *rz, const ECGroup *group);
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/* Computes R = nP where R is (rx, ry) and P is (px, py). The parameters
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* a, b and p are the elliptic curve coefficients and the prime that
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* determines the field GF2m. Uses projective coordinates. */
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mp_err ec_GF2m_pt_mul_proj(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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#endif
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#endif /* __ec2_h_ */
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