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/* $OpenBSD: sc25519.h,v 1.1 2014/07/22 00:41:19 deraadt Exp $ */
/*
* Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange,
* Peter Schwabe, Bo-Yin Yang.
* Copied from supercop-20130419/crypto_sign/ed25519/ref/sc25519.h
*/
#ifndef SC25519_H
#define SC25519_H
#include "crypto_api.h"
#define sc25519 crypto_sign_ed25519_ref_sc25519
#define shortsc25519 crypto_sign_ed25519_ref_shortsc25519
#define sc25519_from32bytes crypto_sign_ed25519_ref_sc25519_from32bytes
#define shortsc25519_from16bytes crypto_sign_ed25519_ref_shortsc25519_from16bytes
#define sc25519_from64bytes crypto_sign_ed25519_ref_sc25519_from64bytes
#define sc25519_from_shortsc crypto_sign_ed25519_ref_sc25519_from_shortsc
#define sc25519_to32bytes crypto_sign_ed25519_ref_sc25519_to32bytes
#define sc25519_iszero_vartime crypto_sign_ed25519_ref_sc25519_iszero_vartime
#define sc25519_isshort_vartime crypto_sign_ed25519_ref_sc25519_isshort_vartime
#define sc25519_lt_vartime crypto_sign_ed25519_ref_sc25519_lt_vartime
#define sc25519_add crypto_sign_ed25519_ref_sc25519_add
#define sc25519_sub_nored crypto_sign_ed25519_ref_sc25519_sub_nored
#define sc25519_mul crypto_sign_ed25519_ref_sc25519_mul
#define sc25519_mul_shortsc crypto_sign_ed25519_ref_sc25519_mul_shortsc
#define sc25519_window3 crypto_sign_ed25519_ref_sc25519_window3
#define sc25519_window5 crypto_sign_ed25519_ref_sc25519_window5
#define sc25519_2interleave2 crypto_sign_ed25519_ref_sc25519_2interleave2
typedef struct
{
crypto_uint32 v[32];
}
sc25519;
typedef struct
{
crypto_uint32 v[16];
}
shortsc25519;
void sc25519_from32bytes(sc25519 *r, const unsigned char x[32]);
void shortsc25519_from16bytes(shortsc25519 *r, const unsigned char x[16]);
void sc25519_from64bytes(sc25519 *r, const unsigned char x[64]);
void sc25519_from_shortsc(sc25519 *r, const shortsc25519 *x);
void sc25519_to32bytes(unsigned char r[32], const sc25519 *x);
int sc25519_iszero_vartime(const sc25519 *x);
int sc25519_isshort_vartime(const sc25519 *x);
int sc25519_lt_vartime(const sc25519 *x, const sc25519 *y);
void sc25519_add(sc25519 *r, const sc25519 *x, const sc25519 *y);
void sc25519_sub_nored(sc25519 *r, const sc25519 *x, const sc25519 *y);
void sc25519_mul(sc25519 *r, const sc25519 *x, const sc25519 *y);
void sc25519_mul_shortsc(sc25519 *r, const sc25519 *x, const shortsc25519 *y);
/* Convert s into a representation of the form \sum_{i=0}^{84}r[i]2^3
* with r[i] in {-4,...,3}
*/
void sc25519_window3(signed char r[85], const sc25519 *s);
/* Convert s into a representation of the form \sum_{i=0}^{50}r[i]2^5
* with r[i] in {-16,...,15}
*/
void sc25519_window5(signed char r[51], const sc25519 *s);
void sc25519_2interleave2(unsigned char r[127], const sc25519 *s1, const sc25519 *s2);
#endif
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