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trezor-firmware/crypto/ed25519-donna/ed25519-donna-impl-base.h
2019-04-15 19:14:52 +02:00

105 lines
2.8 KiB
C

/*
Timing safe memory compare
*/
int ed25519_verify(const unsigned char *x, const unsigned char *y, size_t len);
/*
conversions
*/
void ge25519_p1p1_to_partial(ge25519 *r, const ge25519_p1p1 *p);
void ge25519_p1p1_to_full(ge25519 *r, const ge25519_p1p1 *p);
void ge25519_full_to_pniels(ge25519_pniels *p, const ge25519 *r);
/*
adding & doubling
*/
void ge25519_double_p1p1(ge25519_p1p1 *r, const ge25519 *p);
#ifndef ED25519_NO_PRECOMP
void ge25519_nielsadd2_p1p1(ge25519_p1p1 *r, const ge25519 *p, const ge25519_niels *q, unsigned char signbit);
#endif
/* computes [s1]p1 + [s2]p2 */
#if USE_MONERO
void ge25519_double_scalarmult_vartime2(ge25519 *r, const ge25519 *p1, const bignum256modm s1, const ge25519 *p2, const bignum256modm s2);
#endif
void ge25519_pnielsadd_p1p1(ge25519_p1p1 *r, const ge25519 *p, const ge25519_pniels *q, unsigned char signbit);
void ge25519_double_partial(ge25519 *r, const ge25519 *p);
void ge25519_double(ge25519 *r, const ge25519 *p);
void ge25519_nielsadd2(ge25519 *r, const ge25519_niels *q);
void ge25519_pnielsadd(ge25519_pniels *r, const ge25519 *p, const ge25519_pniels *q);
/*
pack & unpack
*/
void ge25519_pack(unsigned char r[32], const ge25519 *p);
int ge25519_unpack_negative_vartime(ge25519 *r, const unsigned char p[32]);
/*
scalarmults
*/
void ge25519_set_neutral(ge25519 *r);
/* computes [s1]p1 + [s2]base */
void ge25519_double_scalarmult_vartime(ge25519 *r, const ge25519 *p1, const bignum256modm s1, const bignum256modm s2);
/* computes [s1]p1, constant time */
void ge25519_scalarmult(ge25519 *r, const ge25519 *p1, const bignum256modm s1);
void ge25519_scalarmult_base_choose_niels(ge25519_niels *t, const uint8_t table[256][96], uint32_t pos, signed char b);
/* computes [s]basepoint */
void ge25519_scalarmult_base_niels(ge25519 *r, const uint8_t basepoint_table[256][96], const bignum256modm s);
/* check if r is on curve */
int ge25519_check(const ge25519 *r);
/* a == b */
int ge25519_eq(const ge25519 *a, const ge25519 *b);
/* copies one point to another */
void ge25519_copy(ge25519 *dst, const ge25519 *src);
/* sets B point to r */
void ge25519_set_base(ge25519 *r);
/* 8*P */
void ge25519_mul8(ge25519 *r, const ge25519 *t);
/* -P */
void ge25519_neg_partial(ge25519 *r);
/* -P */
void ge25519_neg_full(ge25519 *r);
/* reduce all coords */
void ge25519_reduce(ge25519 *r, const ge25519 *t);
/* normalizes coords. (x, y, 1, x*y) */
void ge25519_norm(ge25519 *r, const ge25519 * t);
/* Simple addition */
void ge25519_add(ge25519 *r, const ge25519 *a, const ge25519 *b, unsigned char signbit);
/* point from bytes, used in H_p() */
void ge25519_fromfe_frombytes_vartime(ge25519 *r, const unsigned char *s);
/* point from bytes */
int ge25519_unpack_vartime(ge25519 *r, const unsigned char *s);
/* aG, wrapper for niels base mult. */
void ge25519_scalarmult_base_wrapper(ge25519 *r, const bignum256modm s);