libsignal-protocol-c  master
fe.h
1 #ifndef FE_H
2 #define FE_H
3 
4 #include "crypto_int32.h"
5 
6 typedef crypto_int32 fe[10];
7 
8 /*
9 fe means field element.
10 Here the field is \Z/(2^255-19).
11 An element t, entries t[0]...t[9], represents the integer
12 t[0]+2^26 t[1]+2^51 t[2]+2^77 t[3]+2^102 t[4]+...+2^230 t[9].
13 Bounds on each t[i] vary depending on context.
14 */
15 
16 #define fe_frombytes crypto_sign_ed25519_ref10_fe_frombytes
17 #define fe_tobytes crypto_sign_ed25519_ref10_fe_tobytes
18 #define fe_copy crypto_sign_ed25519_ref10_fe_copy
19 #define fe_isnonzero crypto_sign_ed25519_ref10_fe_isnonzero
20 #define fe_isnegative crypto_sign_ed25519_ref10_fe_isnegative
21 #define fe_0 crypto_sign_ed25519_ref10_fe_0
22 #define fe_1 crypto_sign_ed25519_ref10_fe_1
23 #define fe_cswap crypto_sign_ed25519_ref10_fe_cswap
24 #define fe_cmov crypto_sign_ed25519_ref10_fe_cmov
25 #define fe_add crypto_sign_ed25519_ref10_fe_add
26 #define fe_sub crypto_sign_ed25519_ref10_fe_sub
27 #define fe_neg crypto_sign_ed25519_ref10_fe_neg
28 #define fe_mul crypto_sign_ed25519_ref10_fe_mul
29 #define fe_sq crypto_sign_ed25519_ref10_fe_sq
30 #define fe_sq2 crypto_sign_ed25519_ref10_fe_sq2
31 #define fe_mul121666 crypto_sign_ed25519_ref10_fe_mul121666
32 #define fe_invert crypto_sign_ed25519_ref10_fe_invert
33 #define fe_pow22523 crypto_sign_ed25519_ref10_fe_pow22523
34 
35 extern void fe_frombytes(fe,const unsigned char *);
36 extern void fe_tobytes(unsigned char *,const fe);
37 
38 extern void fe_copy(fe,const fe);
39 extern int fe_isnonzero(const fe);
40 extern int fe_isnegative(const fe);
41 extern void fe_0(fe);
42 extern void fe_1(fe);
43 extern void fe_cswap(fe,fe,unsigned int);
44 extern void fe_cmov(fe,const fe,unsigned int);
45 
46 extern void fe_add(fe,const fe,const fe);
47 extern void fe_sub(fe,const fe,const fe);
48 extern void fe_neg(fe,const fe);
49 extern void fe_mul(fe,const fe,const fe);
50 extern void fe_sq(fe,const fe);
51 extern void fe_sq2(fe,const fe);
52 extern void fe_mul121666(fe,const fe);
53 extern void fe_invert(fe,const fe);
54 extern void fe_pow22523(fe,const fe);
55 
56 #endif