release/src/router/libsodium/src/libsodium/crypto_sign/ed25519/ref10/ge.h

   1 #ifndef GE_H
   2 #define GE_H
   3
   4 /*
   5 ge means group element.
   6
   7 Here the group is the set of pairs (x,y) of field elements (see fe.h)
   8 satisfying -x^2 + y^2 = 1 + d x^2y^2
   9 where d = -121665/121666.
  10
  11 Representations:
  12   ge_p2 (projective): (X:Y:Z) satisfying x=X/Z, y=Y/Z
  13   ge_p3 (extended): (X:Y:Z:T) satisfying x=X/Z, y=Y/Z, XY=ZT
  14   ge_p1p1 (completed): ((X:Z),(Y:T)) satisfying x=X/Z, y=Y/T
  15   ge_precomp (Duif): (y+x,y-x,2dxy)
  16 */
  17
  18 #include "fe.h"
  19
  20 typedef struct {
  21   fe X;
  22   fe Y;
  23   fe Z;
  24 } ge_p2;
  25
  26 typedef struct {
  27   fe X;
  28   fe Y;
  29   fe Z;
  30   fe T;
  31 } ge_p3;
  32
  33 typedef struct {
  34   fe X;
  35   fe Y;
  36   fe Z;
  37   fe T;
  38 } ge_p1p1;
  39
  40 typedef struct {
  41   fe yplusx;
  42   fe yminusx;
  43   fe xy2d;
  44 } ge_precomp;
  45
  46 typedef struct {
  47   fe YplusX;
  48   fe YminusX;
  49   fe Z;
  50   fe T2d;
  51 } ge_cached;
  52
  53 #define ge_frombytes_negate_vartime crypto_sign_ed25519_ref10_ge_frombytes_negate_vartime
  54 #define ge_tobytes crypto_sign_ed25519_ref10_ge_tobytes
  55 #define ge_p3_tobytes crypto_sign_ed25519_ref10_ge_p3_tobytes
  56
  57 #define ge_p2_0 crypto_sign_ed25519_ref10_ge_p2_0
  58 #define ge_p3_0 crypto_sign_ed25519_ref10_ge_p3_0
  59 #define ge_precomp_0 crypto_sign_ed25519_ref10_ge_precomp_0
  60 #define ge_p3_to_p2 crypto_sign_ed25519_ref10_ge_p3_to_p2
  61 #define ge_p3_to_cached crypto_sign_ed25519_ref10_ge_p3_to_cached
  62 #define ge_p1p1_to_p2 crypto_sign_ed25519_ref10_ge_p1p1_to_p2
  63 #define ge_p1p1_to_p3 crypto_sign_ed25519_ref10_ge_p1p1_to_p3
  64 #define ge_p2_dbl crypto_sign_ed25519_ref10_ge_p2_dbl
  65 #define ge_p3_dbl crypto_sign_ed25519_ref10_ge_p3_dbl
  66
  67 #define ge_madd crypto_sign_ed25519_ref10_ge_madd
  68 #define ge_msub crypto_sign_ed25519_ref10_ge_msub
  69 #define ge_add crypto_sign_ed25519_ref10_ge_add
  70 #define ge_sub crypto_sign_ed25519_ref10_ge_sub
  71 #define ge_scalarmult_base crypto_sign_ed25519_ref10_ge_scalarmult_base
  72 #define ge_double_scalarmult_vartime crypto_sign_ed25519_ref10_ge_double_scalarmult_vartime
  73
  74 extern void ge_tobytes(unsigned char *,const ge_p2 *);
  75 extern void ge_p3_tobytes(unsigned char *,const ge_p3 *);
  76 extern int ge_frombytes_negate_vartime(ge_p3 *,const unsigned char *);
  77
  78 extern void ge_p2_0(ge_p2 *);
  79 extern void ge_p3_0(ge_p3 *);
  80 extern void ge_precomp_0(ge_precomp *);
  81 extern void ge_p3_to_p2(ge_p2 *,const ge_p3 *);
  82 extern void ge_p3_to_cached(ge_cached *,const ge_p3 *);
  83 extern void ge_p1p1_to_p2(ge_p2 *,const ge_p1p1 *);
  84 extern void ge_p1p1_to_p3(ge_p3 *,const ge_p1p1 *);
  85 extern void ge_p2_dbl(ge_p1p1 *,const ge_p2 *);
  86 extern void ge_p3_dbl(ge_p1p1 *,const ge_p3 *);
  87
  88 extern void ge_madd(ge_p1p1 *,const ge_p3 *,const ge_precomp *);
  89 extern void ge_msub(ge_p1p1 *,const ge_p3 *,const ge_precomp *);
  90 extern void ge_add(ge_p1p1 *,const ge_p3 *,const ge_cached *);
  91 extern void ge_sub(ge_p1p1 *,const ge_p3 *,const ge_cached *);
  92 extern void ge_scalarmult_base(ge_p3 *,const unsigned char *);
  93 extern void ge_double_scalarmult_vartime(ge_p2 *,const unsigned char *,const ge_p3 *,const unsigned char *);
  94
  95 #endif