diff options
Diffstat (limited to 'src/libcryptobox/curve25519/curve25519-donna-c64.c')
| -rw-r--r-- | src/libcryptobox/curve25519/curve25519-donna-c64.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/libcryptobox/curve25519/curve25519-donna-c64.c b/src/libcryptobox/curve25519/curve25519-donna-c64.c index d98c385c2..a3a78fcdb 100644 --- a/src/libcryptobox/curve25519/curve25519-donna-c64.c +++ b/src/libcryptobox/curve25519/curve25519-donna-c64.c @@ -480,12 +480,18 @@ static void crecip (felem out, const felem z) int scalarmult_donna64 (u8 *mypublic, const u8 *secret, const u8 *basepoint) { limb bp[5], x[5], z[5], zmone[5]; - int i; + unsigned char e[32]; + + memcpy (e, secret, 32); + e[0] &= 248; + e[31] &= 127; + e[31] |= 64; fexpand (bp, basepoint); - cmult (x, z, secret, bp); + cmult (x, z, e, bp); crecip (zmone, z); fmul (z, x, zmone); fcontract (mypublic, z); + return 0; } |