crypto/openssh/sc25519.h

   1 /* $OpenBSD: sc25519.h,v 1.3 2013/12/09 11:03:45 markus Exp $ */
   2
   3 /*
   4  * Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange,
   5  * Peter Schwabe, Bo-Yin Yang.
   6  * Copied from supercop-20130419/crypto_sign/ed25519/ref/sc25519.h
   7  */
   8
   9 #ifndef SC25519_H
  10 #define SC25519_H
  11
  12 #include "crypto_api.h"
  13
  14 #define sc25519                  crypto_sign_ed25519_ref_sc25519
  15 #define shortsc25519             crypto_sign_ed25519_ref_shortsc25519
  16 #define sc25519_from32bytes      crypto_sign_ed25519_ref_sc25519_from32bytes
  17 #define shortsc25519_from16bytes crypto_sign_ed25519_ref_shortsc25519_from16bytes
  18 #define sc25519_from64bytes      crypto_sign_ed25519_ref_sc25519_from64bytes
  19 #define sc25519_from_shortsc     crypto_sign_ed25519_ref_sc25519_from_shortsc
  20 #define sc25519_to32bytes        crypto_sign_ed25519_ref_sc25519_to32bytes
  21 #define sc25519_iszero_vartime   crypto_sign_ed25519_ref_sc25519_iszero_vartime
  22 #define sc25519_isshort_vartime  crypto_sign_ed25519_ref_sc25519_isshort_vartime
  23 #define sc25519_lt_vartime       crypto_sign_ed25519_ref_sc25519_lt_vartime
  24 #define sc25519_add              crypto_sign_ed25519_ref_sc25519_add
  25 #define sc25519_sub_nored        crypto_sign_ed25519_ref_sc25519_sub_nored
  26 #define sc25519_mul              crypto_sign_ed25519_ref_sc25519_mul
  27 #define sc25519_mul_shortsc      crypto_sign_ed25519_ref_sc25519_mul_shortsc
  28 #define sc25519_window3          crypto_sign_ed25519_ref_sc25519_window3
  29 #define sc25519_window5          crypto_sign_ed25519_ref_sc25519_window5
  30 #define sc25519_2interleave2     crypto_sign_ed25519_ref_sc25519_2interleave2
  31
  32 typedef struct
  33 {
  34   crypto_uint32 v[32];
  35 }
  36 sc25519;
  37
  38 typedef struct
  39 {
  40   crypto_uint32 v[16];
  41 }
  42 shortsc25519;
  43
  44 void sc25519_from32bytes(sc25519 *r, const unsigned char x[32]);
  45
  46 void shortsc25519_from16bytes(shortsc25519 *r, const unsigned char x[16]);
  47
  48 void sc25519_from64bytes(sc25519 *r, const unsigned char x[64]);
  49
  50 void sc25519_from_shortsc(sc25519 *r, const shortsc25519 *x);
  51
  52 void sc25519_to32bytes(unsigned char r[32], const sc25519 *x);
  53
  54 int sc25519_iszero_vartime(const sc25519 *x);
  55
  56 int sc25519_isshort_vartime(const sc25519 *x);
  57
  58 int sc25519_lt_vartime(const sc25519 *x, const sc25519 *y);
  59
  60 void sc25519_add(sc25519 *r, const sc25519 *x, const sc25519 *y);
  61
  62 void sc25519_sub_nored(sc25519 *r, const sc25519 *x, const sc25519 *y);
  63
  64 void sc25519_mul(sc25519 *r, const sc25519 *x, const sc25519 *y);
  65
  66 void sc25519_mul_shortsc(sc25519 *r, const sc25519 *x, const shortsc25519 *y);
  67
  68 /* Convert s into a representation of the form \sum_{i=0}^{84}r[i]2^3
  69  * with r[i] in {-4,...,3}
  70  */
  71 void sc25519_window3(signed char r[85], const sc25519 *s);
  72
  73 /* Convert s into a representation of the form \sum_{i=0}^{50}r[i]2^5
  74  * with r[i] in {-16,...,15}
  75  */
  76 void sc25519_window5(signed char r[51], const sc25519 *s);
  77
  78 void sc25519_2interleave2(unsigned char r[127], const sc25519 *s1, const sc25519 *s2);
  79
  80 #endif