diff options
| author |   Jason A. Donenfeld <Jason@zx2c4.com> | 2018-09-12 18:33:01 +0200 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-09-12 18:33:01 +0200 |
| commit | 18d6d0920bb6f511159de21f051b0c6d8dab246f (patch) | |
| tree | 71d1308d6631c580889dbe7d3eec971f1529b0bb /poly1305-donna64.c | |
| parent | Add new hacl32 and hacl64 (diff) | |
| download | kbench9000-18d6d0920bb6f511159de21f051b0c6d8dab246f.tar.xz kbench9000-18d6d0920bb6f511159de21f051b0c6d8dab246f.zip | |
Precompute s for small speedupjd/poly-comparison
Diffstat (limited to 'poly1305-donna64.c')
| -rw-r--r-- | poly1305-donna64.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/poly1305-donna64.c b/poly1305-donna64.c index ca35f5e..75a2e73 100644 --- a/poly1305-donna64.c +++ b/poly1305-donna64.c @@ -29,6 +29,7 @@ typedef __uint128_t u128; struct poly1305_internal { u64 r[3]; u64 h[3]; + u64 s[2]; }; static void poly1305_init_generic(void *ctx, const u8 key[16]) @@ -40,11 +41,13 @@ static void poly1305_init_generic(void *ctx, const u8 key[16]) t0 = get_unaligned_le64(&key[0]); t1 = get_unaligned_le64(&key[8]); - /* wiped after finalization */ st->r[0] = (t0) &0xffc0fffffff; st->r[1] = ((t0 >> 44) | (t1 << 20)) & 0xfffffc0ffff; st->r[2] = ((t1 >> 24)) & 0x00ffffffc0f; + st->s[0] = st->r[1] * 20; + st->s[1] = st->r[2] * 20; + /* h = 0 */ st->h[0] = 0; st->h[1] = 0; @@ -70,8 +73,8 @@ static void poly1305_blocks_generic(void *ctx, const u8 *input, size_t len, h1 = st->h[1]; h2 = st->h[2]; - s1 = r1 * (5 << 2); - s2 = r2 * (5 << 2); + s1 = st->s[0]; + s2 = st->s[1]; while (len >= POLY1305_BLOCK_SIZE) { u64 t0, t1; |