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383d26 |
From dfbbe38a74bec140652071dce9dad71514ec7091 Mon Sep 17 00:00:00 2001
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383d26 |
From: "Daniel P. Berrange" <berrange@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
Date: Wed, 24 Apr 2019 10:30:27 +0200
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383d26 |
Subject: [PATCH 08/12] crypto: convert xts_mult_x to use xts_uint128 type
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383d26 |
MIME-Version: 1.0
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
Content-Type: text/plain; charset=UTF-8
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383d26 |
Content-Transfer-Encoding: 8bit
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
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383d26 |
RH-Author: Daniel P. Berrange <berrange@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
Message-id: <20190424103030.2925-7-berrange@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
Patchwork-id: 85895
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
O-Subject: [RHEL-7.7 qemu-kvm-rhev PATCH 6/9] crypto: convert xts_mult_x to use xts_uint128 type
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
Bugzilla: 1666336
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
RH-Acked-by: John Snow <jsnow@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
RH-Acked-by: Eric Blake <eblake@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
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383d26 |
Using 64-bit arithmetic increases the performance for xts-aes-128
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
when built with gcrypt:
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383d26 |
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383d26 |
Encrypt: 355 MB/s -> 545 MB/s
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
Decrypt: 362 MB/s -> 568 MB/s
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
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383d26 |
Reviewed-by: Alberto Garcia <berto@igalia.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
(cherry picked from commit 7dac0dd67426753646df0c23c819609b9e704f59)
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383d26 |
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
383d26 |
---
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383d26 |
crypto/xts.c | 40 ++++++++++++++++++++++++++++------------
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383d26 |
1 file changed, 28 insertions(+), 12 deletions(-)
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383d26 |
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383d26 |
diff --git a/crypto/xts.c b/crypto/xts.c
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383d26 |
index 0ad231f..10ec83f 100644
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383d26 |
--- a/crypto/xts.c
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383d26 |
+++ b/crypto/xts.c
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383d26 |
@@ -24,6 +24,7 @@
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383d26 |
*/
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383d26 |
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383d26 |
#include "qemu/osdep.h"
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383d26 |
+#include "qemu/bswap.h"
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383d26 |
#include "crypto/xts.h"
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383d26 |
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383d26 |
typedef union {
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383d26 |
@@ -39,19 +40,34 @@ static inline void xts_uint128_xor(xts_uint128 *D,
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383d26 |
D->u[1] = S1->u[1] ^ S2->u[1];
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383d26 |
}
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383d26 |
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383d26 |
-static void xts_mult_x(uint8_t *I)
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383d26 |
+static inline void xts_uint128_cpu_to_les(xts_uint128 *v)
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383d26 |
{
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383d26 |
- int x;
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383d26 |
- uint8_t t, tt;
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383d26 |
+ cpu_to_le64s(&v->u[0]);
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383d26 |
+ cpu_to_le64s(&v->u[1]);
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383d26 |
+}
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383d26 |
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383d26 |
- for (x = t = 0; x < 16; x++) {
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383d26 |
- tt = I[x] >> 7;
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383d26 |
- I[x] = ((I[x] << 1) | t) & 0xFF;
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383d26 |
- t = tt;
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383d26 |
- }
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383d26 |
- if (tt) {
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383d26 |
- I[0] ^= 0x87;
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383d26 |
+static inline void xts_uint128_le_to_cpus(xts_uint128 *v)
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383d26 |
+{
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383d26 |
+ le64_to_cpus(&v->u[0]);
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383d26 |
+ le64_to_cpus(&v->u[1]);
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383d26 |
+}
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383d26 |
+
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383d26 |
+static void xts_mult_x(xts_uint128 *I)
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383d26 |
+{
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383d26 |
+ uint64_t tt;
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383d26 |
+
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383d26 |
+ xts_uint128_le_to_cpus(I);
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383d26 |
+
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383d26 |
+ tt = I->u[0] >> 63;
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383d26 |
+ I->u[0] <<= 1;
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383d26 |
+
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383d26 |
+ if (I->u[1] >> 63) {
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383d26 |
+ I->u[0] ^= 0x87;
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383d26 |
}
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383d26 |
+ I->u[1] <<= 1;
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383d26 |
+ I->u[1] |= tt;
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383d26 |
+
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383d26 |
+ xts_uint128_cpu_to_les(I);
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383d26 |
}
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383d26 |
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383d26 |
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383d26 |
@@ -79,7 +95,7 @@ static void xts_tweak_encdec(const void *ctx,
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383d26 |
xts_uint128_xor(dst, dst, iv);
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383d26 |
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383d26 |
/* LFSR the tweak */
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383d26 |
- xts_mult_x(iv->b);
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+ xts_mult_x(iv);
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}
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@@ -134,7 +150,7 @@ void xts_decrypt(const void *datactx,
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if (mo > 0) {
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xts_uint128 S, D;
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memcpy(&CC, &T, XTS_BLOCK_SIZE);
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- xts_mult_x(CC.b);
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+ xts_mult_x(&CC;;
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/* PP = tweak decrypt block m-1 */
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memcpy(&S, src, XTS_BLOCK_SIZE);
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--
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1.8.3.1
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