From: Andy Polyakov <appro@openssl.org>
Date: Tue, 24 Feb 2015 09:07:22 +0000 (+0100)
Subject: aes/asm/bsaes-armv7: fix kernel-side XTS and harmonize with Linux.
X-Git-Tag: OpenSSL_1_1_0-pre1~1619
X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff_plain;h=e620e5ae37bc3fc5e457ebf3edcdd01b20f8c5dd;hp=ccc227565da59c4d6c707925c4230ab2afa2cf87;ds=inline

aes/asm/bsaes-armv7: fix kernel-side XTS and harmonize with Linux.

XTS bug spotted and fix suggested by Adrian Kotelba.

Reviewed-by: Tim Hudson <tjh@openssl.org>
---

diff --git a/crypto/aes/asm/bsaes-armv7.pl b/crypto/aes/asm/bsaes-armv7.pl
index fcc81d1a49..a4d3856e7d 100644
--- a/crypto/aes/asm/bsaes-armv7.pl
+++ b/crypto/aes/asm/bsaes-armv7.pl
@@ -702,7 +702,7 @@ $code.=<<___;
 # define BSAES_ASM_EXTENDED_KEY
 # define XTS_CHAIN_TWEAK
 # define __ARM_ARCH__ __LINUX_ARM_ARCH__
-# define __ARM_MAX_ARCH__ __LINUX_ARM_ARCH__
+# define __ARM_MAX_ARCH__ 7
 #endif
 
 #ifdef __thumb__
@@ -2078,9 +2078,11 @@ bsaes_xts_decrypt:
 	vld1.8	{@XMM[8]}, [r0]			@ initial tweak
 	adr	$magic, .Lxts_magic
 
+#ifndef	XTS_CHAIN_TWEAK
 	tst	$len, #0xf			@ if not multiple of 16
 	it	ne				@ Thumb2 thing, sanity check in ARM
 	subne	$len, #0x10			@ subtract another 16 bytes
+#endif
 	subs	$len, #0x80
 
 	blo	.Lxts_dec_short