diff options
| author |   Damjan Marion <damarion@cisco.com> | 2020-02-24 14:26:08 +0100 |
|---|---|---|
| committer | Damjan Marion <damarion@cisco.com> | 2020-02-24 14:29:54 +0100 |
| commit | a2e56ee4d89ff1342d277747b97d44469f578407 (patch) | |
| tree | ad99a51057b0bd548c8b557bdcfd255e07cabcb5 /src/plugins/crypto_native/ghash.h | |
| parent | bc50a665148a8d326157723cbc1933920b5604b1 (diff) | |
crypto-native: inverse Hi so it naturally fits into 512-bit register
Type: refactor
Change-Id: I0c6ca9356af179abd0a414b356dea7e3a3eb0dd6
Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/plugins/crypto_native/ghash.h')
| -rw-r--r-- | src/plugins/crypto_native/ghash.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/plugins/crypto_native/ghash.h b/src/plugins/crypto_native/ghash.h index abbfd2856f0..f389d11cfe7 100644 --- a/src/plugins/crypto_native/ghash.h +++ b/src/plugins/crypto_native/ghash.h @@ -384,7 +384,7 @@ ghash4_final (ghash4_data_t * gd) #endif static_always_inline void -ghash_precompute (u8x16 H, u8x16 * Hi, int count) +ghash_precompute (u8x16 H, u8x16 * Hi, int n) { u8x16 r8; u32x4 r32; @@ -401,11 +401,11 @@ ghash_precompute (u8x16 H, u8x16 * Hi, int count) /* *INDENT-OFF* */ r32 = r32 == (u32x4) {1, 0, 0, 1}; /* *INDENT-ON* */ - Hi[0] = H ^ ((u8x16) r32 & ghash_poly); + Hi[n - 1] = H = H ^ ((u8x16) r32 & ghash_poly); /* calculate H^(i + 1) */ - for (int i = 1; i < count; i++) - Hi[i] = ghash_mul (Hi[0], Hi[i - 1]); + for (int i = n - 2; i >= 0; i--) + Hi[i] = ghash_mul (H, Hi[i + 1]); } #endif /* __ghash_h__ */ |