1 #include "curve25519-donna.h"
2
3 #if !defined(CURVE25519_SUFFIX)
4 #define CURVE25519_SUFFIX
5 #endif
6
7 #define CURVE25519_FN3(fn,suffix) fn##suffix
8 #define CURVE25519_FN2(fn,suffix) CURVE25519_FN3(fn,suffix)
9 #define CURVE25519_FN(fn) CURVE25519_FN2(fn,CURVE25519_SUFFIX)
10
11 void
CURVE25519_FN(curve25519_donna)12 CURVE25519_FN(curve25519_donna) (curve25519_key mypublic, const curve25519_key secret, const curve25519_key basepoint) {
13 curve25519_key e;
14 size_t i;
15
16 for (i = 0;i < 32;++i) e[i] = secret[i];
17 e[0] &= 0xf8;
18 e[31] &= 0x7f;
19 e[31] |= 0x40;
20 curve25519_scalarmult_donna(mypublic, e, basepoint);
21 }
22
23 void
CURVE25519_FN(curve25519_donna_basepoint)24 CURVE25519_FN(curve25519_donna_basepoint) (curve25519_key mypublic, const curve25519_key secret) {
25 static const curve25519_key basepoint = {9};
26 CURVE25519_FN(curve25519_donna)(mypublic, secret, basepoint);
27 }
28