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-#!/usr/bin/env perl
-
-# ====================================================================
-# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
-# project. The module is, however, dual licensed under OpenSSL and
-# CRYPTOGAMS licenses depending on where you obtain it. For further
-# details see http://www.openssl.org/~appro/cryptogams/.
-#
-# Specific modes and adaptation for Linux kernel by Ard Biesheuvel
-# <ard.biesheuvel@linaro.org>. Permission to use under GPL terms is
-# granted.
-# ====================================================================
-
-# Bit-sliced AES for ARM NEON
-#
-# February 2012.
-#
-# This implementation is direct adaptation of bsaes-x86_64 module for
-# ARM NEON. Except that this module is endian-neutral [in sense that
-# it can be compiled for either endianness] by courtesy of vld1.8's
-# neutrality. Initial version doesn't implement interface to OpenSSL,
-# only low-level primitives and unsupported entry points, just enough
-# to collect performance results, which for Cortex-A8 core are:
-#
-# encrypt 19.5 cycles per byte processed with 128-bit key
-# decrypt 22.1 cycles per byte processed with 128-bit key
-# key conv. 440 cycles per 128-bit key/0.18 of 8x block
-#
-# Snapdragon S4 encrypts byte in 17.6 cycles and decrypts in 19.7,
-# which is [much] worse than anticipated (for further details see
-# http://www.openssl.org/~appro/Snapdragon-S4.html).
-#
-# Cortex-A15 manages in 14.2/16.1 cycles [when integer-only code
-# manages in 20.0 cycles].
-#
-# When comparing to x86_64 results keep in mind that NEON unit is
-# [mostly] single-issue and thus can't [fully] benefit from
-# instruction-level parallelism. And when comparing to aes-armv4
-# results keep in mind key schedule conversion overhead (see
-# bsaes-x86_64.pl for further details)...
-#
-# <appro@openssl.org>
-
-# April-August 2013
-#
-# Add CBC, CTR and XTS subroutines, adapt for kernel use.
-#
-# <ard.biesheuvel@linaro.org>
-
-while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {}
-open STDOUT,">$output";
-
-my ($inp,$out,$len,$key)=("r0","r1","r2","r3");
-my @XMM=map("q$_",(0..15));
-
-{
-my ($key,$rounds,$const)=("r4","r5","r6");
-
-sub Dlo() { shift=~m|q([1]?[0-9])|?"d".($1*2):""; }
-sub Dhi() { shift=~m|q([1]?[0-9])|?"d".($1*2+1):""; }
-
-sub Sbox {
-# input in lsb > [b0, b1, b2, b3, b4, b5, b6, b7] < msb
-# output in lsb > [b0, b1, b4, b6, b3, b7, b2, b5] < msb
-my @b=@_[0..7];
-my @t=@_[8..11];
-my @s=@_[12..15];
- &InBasisChange (@b);
- &Inv_GF256 (@b[6,5,0,3,7,1,4,2],@t,@s);
- &OutBasisChange (@b[7,1,4,2,6,5,0,3]);
-}
-
-sub InBasisChange {
-# input in lsb > [b0, b1, b2, b3, b4, b5, b6, b7] < msb
-# output in lsb > [b6, b5, b0, b3, b7, b1, b4, b2] < msb
-my @b=@_[0..7];
-$code.=<<___;
- veor @b[2], @b[2], @b[1]
- veor @b[5], @b[5], @b[6]
- veor @b[3], @b[3], @b[0]
- veor @b[6], @b[6], @b[2]
- veor @b[5], @b[5], @b[0]
-
- veor @b[6], @b[6], @b[3]
- veor @b[3], @b[3], @b[7]
- veor @b[7], @b[7], @b[5]
- veor @b[3], @b[3], @b[4]
- veor @b[4], @b[4], @b[5]
-
- veor @b[2], @b[2], @b[7]
- veor @b[3], @b[3], @b[1]
- veor @b[1], @b[1], @b[5]
-___
-}
-
-sub OutBasisChange {
-# input in lsb > [b0, b1, b2, b3, b4, b5, b6, b7] < msb
-# output in lsb > [b6, b1, b2, b4, b7, b0, b3, b5] < msb
-my @b=@_[0..7];
-$code.=<<___;
- veor @b[0], @b[0], @b[6]
- veor @b[1], @b[1], @b[4]
- veor @b[4], @b[4], @b[6]
- veor @b[2], @b[2], @b[0]
- veor @b[6], @b[6], @b[1]
-
- veor @b[1], @b[1], @b[5]
- veor @b[5], @b[5], @b[3]
- veor @b[3], @b[3], @b[7]
- veor @b[7], @b[7], @b[5]
- veor @b[2], @b[2], @b[5]
-
- veor @b[4], @b[4], @b[7]
-___
-}
-
-sub InvSbox {
-# input in lsb > [b0, b1, b2, b3, b4, b5, b6, b7] < msb
-# output in lsb > [b0, b1, b6, b4, b2, b7, b3, b5] < msb
-my @b=@_[0..7];
-my @t=@_[8..11];
-my @s=@_[12..15];
- &InvInBasisChange (@b);
- &Inv_GF256 (@b[5,1,2,6,3,7,0,4],@t,@s);
- &InvOutBasisChange (@b[3,7,0,4,5,1,2,6]);
-}
-
-sub InvInBasisChange { # OutBasisChange in reverse (with twist)
-my @b=@_[5,1,2,6,3,7,0,4];
-$code.=<<___
- veor @b[1], @b[1], @b[7]
- veor @b[4], @b[4], @b[7]
-
- veor @b[7], @b[7], @b[5]
- veor @b[1], @b[1], @b[3]
- veor @b[2], @b[2], @b[5]
- veor @b[3], @b[3], @b[7]
-
- veor @b[6], @b[6], @b[1]
- veor @b[2], @b[2], @b[0]
- veor @b[5], @b[5], @b[3]
- veor @b[4], @b[4], @b[6]
- veor @b[0], @b[0], @b[6]
- veor @b[1], @b[1], @b[4]
-___
-}
-
-sub InvOutBasisChange { # InBasisChange in reverse
-my @b=@_[2,5,7,3,6,1,0,4];
-$code.=<<___;
- veor @b[1], @b[1], @b[5]
- veor @b[2], @b[2], @b[7]
-
- veor @b[3], @b[3], @b[1]
- veor @b[4], @b[4], @b[5]
- veor @b[7], @b[7], @b[5]
- veor @b[3], @b[3], @b[4]
- veor @b[5], @b[5], @b[0]
- veor @b[3], @b[3], @b[7]
- veor @b[6], @b[6], @b[2]
- veor @b[2], @b[2], @b[1]
- veor @b[6], @b[6], @b[3]
-
- veor @b[3], @b[3], @b[0]
- veor @b[5], @b[5], @b[6]
-___
-}
-
-sub Mul_GF4 {
-#;*************************************************************
-#;* Mul_GF4: Input x0-x1,y0-y1 Output x0-x1 Temp t0 (8) *
-#;*************************************************************
-my ($x0,$x1,$y0,$y1,$t0,$t1)=@_;
-$code.=<<___;
- veor $t0, $y0, $y1
- vand $t0, $t0, $x0
- veor $x0, $x0, $x1
- vand $t1, $x1, $y0
- vand $x0, $x0, $y1
- veor $x1, $t1, $t0
- veor $x0, $x0, $t1
-___
-}
-
-sub Mul_GF4_N { # not used, see next subroutine
-# multiply and scale by N
-my ($x0,$x1,$y0,$y1,$t0)=@_;
-$code.=<<___;
- veor $t0, $y0, $y1
- vand $t0, $t0, $x0
- veor $x0, $x0, $x1
- vand $x1, $x1, $y0
- vand $x0, $x0, $y1
- veor $x1, $x1, $x0
- veor $x0, $x0, $t0
-___
-}
-
-sub Mul_GF4_N_GF4 {
-# interleaved Mul_GF4_N and Mul_GF4
-my ($x0,$x1,$y0,$y1,$t0,
- $x2,$x3,$y2,$y3,$t1)=@_;
-$code.=<<___;
- veor $t0, $y0, $y1
- veor $t1, $y2, $y3
- vand $t0, $t0, $x0
- vand $t1, $t1, $x2
- veor $x0, $x0, $x1
- veor $x2, $x2, $x3
- vand $x1, $x1, $y0
- vand $x3, $x3, $y2
- vand $x0, $x0, $y1
- vand $x2, $x2, $y3
- veor $x1, $x1, $x0
- veor $x2, $x2, $x3
- veor $x0, $x0, $t0
- veor $x3, $x3, $t1
-___
-}
-sub Mul_GF16_2 {
-my @x=@_[0..7];
-my @y=@_[8..11];
-my @t=@_[12..15];
-$code.=<<___;
- veor @t[0], @x[0], @x[2]
- veor @t[1], @x[1], @x[3]
-___
- &Mul_GF4 (@x[0], @x[1], @y[0], @y[1], @t[2..3]);
-$code.=<<___;
- veor @y[0], @y[0], @y[2]
- veor @y[1], @y[1], @y[3]
-___
- Mul_GF4_N_GF4 (@t[0], @t[1], @y[0], @y[1], @t[3],
- @x[2], @x[3], @y[2], @y[3], @t[2]);
-$code.=<<___;
- veor @x[0], @x[0], @t[0]
- veor @x[2], @x[2], @t[0]
- veor @x[1], @x[1], @t[1]
- veor @x[3], @x[3], @t[1]
-
- veor @t[0], @x[4], @x[6]
- veor @t[1], @x[5], @x[7]
-___
- &Mul_GF4_N_GF4 (@t[0], @t[1], @y[0], @y[1], @t[3],
- @x[6], @x[7], @y[2], @y[3], @t[2]);
-$code.=<<___;
- veor @y[0], @y[0], @y[2]
- veor @y[1], @y[1], @y[3]
-___
- &Mul_GF4 (@x[4], @x[5], @y[0], @y[1], @t[2..3]);
-$code.=<<___;
- veor @x[4], @x[4], @t[0]
- veor @x[6], @x[6], @t[0]
- veor @x[5], @x[5], @t[1]
- veor @x[7], @x[7], @t[1]
-___
-}
-sub Inv_GF256 {
-#;********************************************************************
-#;* Inv_GF256: Input x0-x7 Output x0-x7 Temp t0-t3,s0-s3 (144) *
-#;********************************************************************
-my @x=@_[0..7];
-my @t=@_[8..11];
-my @s=@_[12..15];
-# direct optimizations from hardware
-$code.=<<___;
- veor @t[3], @x[4], @x[6]
- veor @t[2], @x[5], @x[7]
- veor @t[1], @x[1], @x[3]
- veor @s[1], @x[7], @x[6]
- vmov @t[0], @t[2]
- veor @s[0], @x[0], @x[2]
-
- vorr @t[2], @t[2], @t[1]
- veor @s[3], @t[3], @t[0]
- vand @s[2], @t[3], @s[0]
- vorr @t[3], @t[3], @s[0]
- veor @s[0], @s[0], @t[1]
- vand @t[0], @t[0], @t[1]
- veor @t[1], @x[3], @x[2]
- vand @s[3], @s[3], @s[0]
- vand @s[1], @s[1], @t[1]
- veor @t[1], @x[4], @x[5]
- veor @s[0], @x[1], @x[0]
- veor @t[3], @t[3], @s[1]
- veor @t[2], @t[2], @s[1]
- vand @s[1], @t[1], @s[0]
- vorr @t[1], @t[1], @s[0]
- veor @t[3], @t[3], @s[3]
- veor @t[0], @t[0], @s[1]
- veor @t[2], @t[2], @s[2]
- veor @t[1], @t[1], @s[3]
- veor @t[0], @t[0], @s[2]
- vand @s[0], @x[7], @x[3]
- veor @t[1], @t[1], @s[2]
- vand @s[1], @x[6], @x[2]
- vand @s[2], @x[5], @x[1]
- vorr @s[3], @x[4], @x[0]
- veor @t[3], @t[3], @s[0]
- veor @t[1], @t[1], @s[2]
- veor @t[0], @t[0], @s[3]
- veor @t[2], @t[2], @s[1]
-
- @ Inv_GF16 \t0, \t1, \t2, \t3, \s0, \s1, \s2, \s3
-
- @ new smaller inversion
-
- vand @s[2], @t[3], @t[1]
- vmov @s[0], @t[0]
-
- veor @s[1], @t[2], @s[2]
- veor @s[3], @t[0], @s[2]
- veor @s[2], @t[0], @s[2] @ @s[2]=@s[3]
-
- vbsl @s[1], @t[1], @t[0]
- vbsl @s[3], @t[3], @t[2]
- veor @t[3], @t[3], @t[2]
-
- vbsl @s[0], @s[1], @s[2]
- vbsl @t[0], @s[2], @s[1]
-
- vand @s[2], @s[0], @s[3]
- veor @t[1], @t[1], @t[0]
-
- veor @s[2], @s[2], @t[3]
-___
-# output in s3, s2, s1, t1
-
-# Mul_GF16_2 \x0, \x1, \x2, \x3, \x4, \x5, \x6, \x7, \t2, \t3, \t0, \t1, \s0, \s1, \s2, \s3
-
-# Mul_GF16_2 \x0, \x1, \x2, \x3, \x4, \x5, \x6, \x7, \s3, \s2, \s1, \t1, \s0, \t0, \t2, \t3
- &Mul_GF16_2(@x,@s[3,2,1],@t[1],@s[0],@t[0,2,3]);
-
-### output msb > [x3,x2,x1,x0,x7,x6,x5,x4] < lsb
-}
-
-# AES linear components
-
-sub ShiftRows {
-my @x=@_[0..7];
-my @t=@_[8..11];
-my $mask=pop;
-$code.=<<___;
- vldmia $key!, {@t[0]-@t[3]}
- veor @t[0], @t[0], @x[0]
- veor @t[1], @t[1], @x[1]
- vtbl.8 `&Dlo(@x[0])`, {@t[0]}, `&Dlo($mask)`
- vtbl.8 `&Dhi(@x[0])`, {@t[0]}, `&Dhi($mask)`
- vldmia $key!, {@t[0]}
- veor @t[2], @t[2], @x[2]
- vtbl.8 `&Dlo(@x[1])`, {@t[1]}, `&Dlo($mask)`
- vtbl.8 `&Dhi(@x[1])`, {@t[1]}, `&Dhi($mask)`
- vldmia $key!, {@t[1]}
- veor @t[3], @t[3], @x[3]
- vtbl.8 `&Dlo(@x[2])`, {@t[2]}, `&Dlo($mask)`
- vtbl.8 `&Dhi(@x[2])`, {@t[2]}, `&Dhi($mask)`
- vldmia $key!, {@t[2]}
- vtbl.8 `&Dlo(@x[3])`, {@t[3]}, `&Dlo($mask)`
- vtbl.8 `&Dhi(@x[3])`, {@t[3]}, `&Dhi($mask)`
- vldmia $key!, {@t[3]}
- veor @t[0], @t[0], @x[4]
- veor @t[1], @t[1], @x[5]
- vtbl.8 `&Dlo(@x[4])`, {@t[0]}, `&Dlo($mask)`
- vtbl.8 `&Dhi(@x[4])`, {@t[0]}, `&Dhi($mask)`
- veor @t[2], @t[2], @x[6]
- vtbl.8 `&Dlo(@x[5])`, {@t[1]}, `&Dlo($mask)`
- vtbl.8 `&Dhi(@x[5])`, {@t[1]}, `&Dhi($mask)`
- veor @t[3], @t[3], @x[7]
- vtbl.8 `&Dlo(@x[6])`, {@t[2]}, `&Dlo($mask)`
- vtbl.8 `&Dhi(@x[6])`, {@t[2]}, `&Dhi($mask)`
- vtbl.8 `&Dlo(@x[7])`, {@t[3]}, `&Dlo($mask)`
- vtbl.8 `&Dhi(@x[7])`, {@t[3]}, `&Dhi($mask)`
-___
-}
-
-sub MixColumns {
-# modified to emit output in order suitable for feeding back to aesenc[last]
-my @x=@_[0..7];
-my @t=@_[8..15];
-my $inv=@_[16]; # optional
-$code.=<<___;
- vext.8 @t[0], @x[0], @x[0], #12 @ x0 <<< 32
- vext.8 @t[1], @x[1], @x[1], #12
- veor @x[0], @x[0], @t[0] @ x0 ^ (x0 <<< 32)
- vext.8 @t[2], @x[2], @x[2], #12
- veor @x[1], @x[1], @t[1]
- vext.8 @t[3], @x[3], @x[3], #12
- veor @x[2], @x[2], @t[2]
- vext.8 @t[4], @x[4], @x[4], #12
- veor @x[3], @x[3], @t[3]
- vext.8 @t[5], @x[5], @x[5], #12
- veor @x[4], @x[4], @t[4]
- vext.8 @t[6], @x[6], @x[6], #12
- veor @x[5], @x[5], @t[5]
- vext.8 @t[7], @x[7], @x[7], #12
- veor @x[6], @x[6], @t[6]
-
- veor @t[1], @t[1], @x[0]
- veor @x[7], @x[7], @t[7]
- vext.8 @x[0], @x[0], @x[0], #8 @ (x0 ^ (x0 <<< 32)) <<< 64)
- veor @t[2], @t[2], @x[1]
- veor @t[0], @t[0], @x[7]
- veor @t[1], @t[1], @x[7]
- vext.8 @x[1], @x[1], @x[1], #8
- veor @t[5], @t[5], @x[4]
- veor @x[0], @x[0], @t[0]
- veor @t[6], @t[6], @x[5]
- veor @x[1], @x[1], @t[1]
- vext.8 @t[0], @x[4], @x[4], #8
- veor @t[4], @t[4], @x[3]
- vext.8 @t[1], @x[5], @x[5], #8
- veor @t[7], @t[7], @x[6]
- vext.8 @x[4], @x[3], @x[3], #8
- veor @t[3], @t[3], @x[2]
- vext.8 @x[5], @x[7], @x[7], #8
- veor @t[4], @t[4], @x[7]
- vext.8 @x[3], @x[6], @x[6], #8
- veor @t[3], @t[3], @x[7]
- vext.8 @x[6], @x[2], @x[2], #8
- veor @x[7], @t[1], @t[5]
-___
-$code.=<<___ if (!$inv);
- veor @x[2], @t[0], @t[4]
- veor @x[4], @x[4], @t[3]
- veor @x[5], @x[5], @t[7]
- veor @x[3], @x[3], @t[6]
- @ vmov @x[2], @t[0]
- veor @x[6], @x[6], @t[2]
- @ vmov @x[7], @t[1]
-___
-$code.=<<___ if ($inv);
- veor @t[3], @t[3], @x[4]
- veor @x[5], @x[5], @t[7]
- veor @x[2], @x[3], @t[6]
- veor @x[3], @t[0], @t[4]
- veor @x[4], @x[6], @t[2]
- vmov @x[6], @t[3]
- @ vmov @x[7], @t[1]
-___
-}
-
-sub InvMixColumns_orig {
-my @x=@_[0..7];
-my @t=@_[8..15];
-
-$code.=<<___;
- @ multiplication by 0x0e
- vext.8 @t[7], @x[7], @x[7], #12
- vmov @t[2], @x[2]
- veor @x[2], @x[2], @x[5] @ 2 5
- veor @x[7], @x[7], @x[5] @ 7 5
- vext.8 @t[0], @x[0], @x[0], #12
- vmov @t[5], @x[5]
- veor @x[5], @x[5], @x[0] @ 5 0 [1]
- veor @x[0], @x[0], @x[1] @ 0 1
- vext.8 @t[1], @x[1], @x[1], #12
- veor @x[1], @x[1], @x[2] @ 1 25
- veor @x[0], @x[0], @x[6] @ 01 6 [2]
- vext.8 @t[3], @x[3], @x[3], #12
- veor @x[1], @x[1], @x[3] @ 125 3 [4]
- veor @x[2], @x[2], @x[0] @ 25 016 [3]
- veor @x[3], @x[3], @x[7] @ 3 75
- veor @x[7], @x[7], @x[6] @ 75 6 [0]
- vext.8 @t[6], @x[6], @x[6], #12
- vmov @t[4], @x[4]
- veor @x[6], @x[6], @x[4] @ 6 4
- veor @x[4], @x[4], @x[3] @ 4 375 [6]
- veor @x[3], @x[3], @x[7] @ 375 756=36
- veor @x[6], @x[6], @t[5] @ 64 5 [7]
- veor @x[3], @x[3], @t[2] @ 36 2
- vext.8 @t[5], @t[5], @t[5], #12
- veor @x[3], @x[3], @t[4] @ 362 4 [5]
-___
- my @y = @x[7,5,0,2,1,3,4,6];
-$code.=<<___;
- @ multiplication by 0x0b
- veor @y[1], @y[1], @y[0]
- veor @y[0], @y[0], @t[0]
- vext.8 @t[2], @t[2], @t[2], #12
- veor @y[1], @y[1], @t[1]
- veor @y[0], @y[0], @t[5]
- vext.8 @t[4], @t[4], @t[4], #12
- veor @y[1], @y[1], @t[6]
- veor @y[0], @y[0], @t[7]
- veor @t[7], @t[7], @t[6] @ clobber t[7]
-
- veor @y[3], @y[3], @t[0]
- veor @y[1], @y[1], @y[0]
- vext.8 @t[0], @t[0], @t[0], #12
- veor @y[2], @y[2], @t[1]
- veor @y[4], @y[4], @t[1]
- vext.8 @t[1], @t[1], @t[1], #12
- veor @y[2], @y[2], @t[2]
- veor @y[3], @y[3], @t[2]
- veor @y[5], @y[5], @t[2]
- veor @y[2], @y[2], @t[7]
- vext.8 @t[2], @t[2], @t[2], #12
- veor @y[3], @y[3], @t[3]
- veor @y[6], @y[6], @t[3]
- veor @y[4], @y[4], @t[3]
- veor @y[7], @y[7], @t[4]
- vext.8 @t[3], @t[3], @t[3], #12
- veor @y[5], @y[5], @t[4]
- veor @y[7], @y[7], @t[7]
- veor @t[7], @t[7], @t[5] @ clobber t[7] even more
- veor @y[3], @y[3], @t[5]
- veor @y[4], @y[4], @t[4]
-
- veor @y[5], @y[5], @t[7]
- vext.8 @t[4], @t[4], @t[4], #12
- veor @y[6], @y[6], @t[7]
- veor @y[4], @y[4], @t[7]
-
- veor @t[7], @t[7], @t[5]
- vext.8 @t[5], @t[5], @t[5], #12
-
- @ multiplication by 0x0d
- veor @y[4], @y[4], @y[7]
- veor @t[7], @t[7], @t[6] @ restore t[7]
- veor @y[7], @y[7], @t[4]
- vext.8 @t[6], @t[6], @t[6], #12
- veor @y[2], @y[2], @t[0]
- veor @y[7], @y[7], @t[5]
- vext.8 @t[7], @t[7], @t[7], #12
- veor @y[2], @y[2], @t[2]
-
- veor @y[3], @y[3], @y[1]
- veor @y[1], @y[1], @t[1]
- veor @y[0], @y[0], @t[0]
- veor @y[3], @y[3], @t[0]
- veor @y[1], @y[1], @t[5]
- veor @y[0], @y[0], @t[5]
- vext.8 @t[0], @t[0], @t[0], #12
- veor @y[1], @y[1], @t[7]
- veor @y[0], @y[0], @t[6]
- veor @y[3], @y[3], @y[1]
- veor @y[4], @y[4], @t[1]
- vext.8 @t[1], @t[1], @t[1], #12
-
- veor @y[7], @y[7], @t[7]
- veor @y[4], @y[4], @t[2]
- veor @y[5], @y[5], @t[2]
- veor @y[2], @y[2], @t[6]
- veor @t[6], @t[6], @t[3] @ clobber t[6]
- vext.8 @t[2], @t[2], @t[2], #12
- veor @y[4], @y[4], @y[7]
- veor @y[3], @y[3], @t[6]
-
- veor @y[6], @y[6], @t[6]
- veor @y[5], @y[5], @t[5]
- vext.8 @t[5], @t[5], @t[5], #12
- veor @y[6], @y[6], @t[4]
- vext.8 @t[4], @t[4], @t[4], #12
- veor @y[5], @y[5], @t[6]
- veor @y[6], @y[6], @t[7]
- vext.8 @t[7], @t[7], @t[7], #12
- veor @t[6], @t[6], @t[3] @ restore t[6]
- vext.8 @t[3], @t[3], @t[3], #12
-
- @ multiplication by 0x09
- veor @y[4], @y[4], @y[1]
- veor @t[1], @t[1], @y[1] @ t[1]=y[1]
- veor @t[0], @t[0], @t[5] @ clobber t[0]
- vext.8 @t[6], @t[6], @t[6], #12
- veor @t[1], @t[1], @t[5]
- veor @y[3], @y[3], @t[0]
- veor @t[0], @t[0], @y[0] @ t[0]=y[0]
- veor @t[1], @t[1], @t[6]
- veor @t[6], @t[6], @t[7] @ clobber t[6]
- veor @y[4], @y[4], @t[1]
- veor @y[7], @y[7], @t[4]
- veor @y[6], @y[6], @t[3]
- veor @y[5], @y[5], @t[2]
- veor @t[4], @t[4], @y[4] @ t[4]=y[4]
- veor @t[3], @t[3], @y[3] @ t[3]=y[3]
- veor @t[5], @t[5], @y[5] @ t[5]=y[5]
- veor @t[2], @t[2], @y[2] @ t[2]=y[2]
- veor @t[3], @t[3], @t[7]
- veor @XMM[5], @t[5], @t[6]
- veor @XMM[6], @t[6], @y[6] @ t[6]=y[6]
- veor @XMM[2], @t[2], @t[6]
- veor @XMM[7], @t[7], @y[7] @ t[7]=y[7]
-
- vmov @XMM[0], @t[0]
- vmov @XMM[1], @t[1]
- @ vmov @XMM[2], @t[2]
- vmov @XMM[3], @t[3]
- vmov @XMM[4], @t[4]
- @ vmov @XMM[5], @t[5]
- @ vmov @XMM[6], @t[6]
- @ vmov @XMM[7], @t[7]
-___
-}
-
-sub InvMixColumns {
-my @x=@_[0..7];
-my @t=@_[8..15];
-
-# Thanks to Jussi Kivilinna for providing pointer to
-#
-# | 0e 0b 0d 09 | | 02 03 01 01 | | 05 00 04 00 |
-# | 09 0e 0b 0d | = | 01 02 03 01 | x | 00 05 00 04 |
-# | 0d 09 0e 0b | | 01 01 02 03 | | 04 00 05 00 |
-# | 0b 0d 09 0e | | 03 01 01 02 | | 00 04 00 05 |
-
-$code.=<<___;
- @ multiplication by 0x05-0x00-0x04-0x00
- vext.8 @t[0], @x[0], @x[0], #8
- vext.8 @t[6], @x[6], @x[6], #8
- vext.8 @t[7], @x[7], @x[7], #8
- veor @t[0], @t[0], @x[0]
- vext.8 @t[1], @x[1], @x[1], #8
- veor @t[6], @t[6], @x[6]
- vext.8 @t[2], @x[2], @x[2], #8
- veor @t[7], @t[7], @x[7]
- vext.8 @t[3], @x[3], @x[3], #8
- veor @t[1], @t[1], @x[1]
- vext.8 @t[4], @x[4], @x[4], #8
- veor @t[2], @t[2], @x[2]
- vext.8 @t[5], @x[5], @x[5], #8
- veor @t[3], @t[3], @x[3]
- veor @t[4], @t[4], @x[4]
- veor @t[5], @t[5], @x[5]
-
- veor @x[0], @x[0], @t[6]
- veor @x[1], @x[1], @t[6]
- veor @x[2], @x[2], @t[0]
- veor @x[4], @x[4], @t[2]
- veor @x[3], @x[3], @t[1]
- veor @x[1], @x[1], @t[7]
- veor @x[2], @x[2], @t[7]
- veor @x[4], @x[4], @t[6]
- veor @x[5], @x[5], @t[3]
- veor @x[3], @x[3], @t[6]
- veor @x[6], @x[6], @t[4]
- veor @x[4], @x[4], @t[7]
- veor @x[5], @x[5], @t[7]
- veor @x[7], @x[7], @t[5]
-___
- &MixColumns (@x,@t,1); # flipped 2<->3 and 4<->6
-}
-
-sub swapmove {
-my ($a,$b,$n,$mask,$t)=@_;
-$code.=<<___;
- vshr.u64 $t, $b, #$n
- veor $t, $t, $a
- vand $t, $t, $mask
- veor $a, $a, $t
- vshl.u64 $t, $t, #$n
- veor $b, $b, $t
-___
-}
-sub swapmove2x {
-my ($a0,$b0,$a1,$b1,$n,$mask,$t0,$t1)=@_;
-$code.=<<___;
- vshr.u64 $t0, $b0, #$n
- vshr.u64 $t1, $b1, #$n
- veor $t0, $t0, $a0
- veor $t1, $t1, $a1
- vand $t0, $t0, $mask
- vand $t1, $t1, $mask
- veor $a0, $a0, $t0
- vshl.u64 $t0, $t0, #$n
- veor $a1, $a1, $t1
- vshl.u64 $t1, $t1, #$n
- veor $b0, $b0, $t0
- veor $b1, $b1, $t1
-___
-}
-
-sub bitslice {
-my @x=reverse(@_[0..7]);
-my ($t0,$t1,$t2,$t3)=@_[8..11];
-$code.=<<___;
- vmov.i8 $t0,#0x55 @ compose .LBS0
- vmov.i8 $t1,#0x33 @ compose .LBS1
-___
- &swapmove2x(@x[0,1,2,3],1,$t0,$t2,$t3);
- &swapmove2x(@x[4,5,6,7],1,$t0,$t2,$t3);
-$code.=<<___;
- vmov.i8 $t0,#0x0f @ compose .LBS2
-___
- &swapmove2x(@x[0,2,1,3],2,$t1,$t2,$t3);
- &swapmove2x(@x[4,6,5,7],2,$t1,$t2,$t3);
-
- &swapmove2x(@x[0,4,1,5],4,$t0,$t2,$t3);
- &swapmove2x(@x[2,6,3,7],4,$t0,$t2,$t3);
-}
-
-$code.=<<___;
-#ifndef __KERNEL__
-# include "arm_arch.h"
-
-# define VFP_ABI_PUSH vstmdb sp!,{d8-d15}
-# define VFP_ABI_POP vldmia sp!,{d8-d15}
-# define VFP_ABI_FRAME 0x40
-#else
-# define VFP_ABI_PUSH
-# define VFP_ABI_POP
-# define VFP_ABI_FRAME 0
-# define BSAES_ASM_EXTENDED_KEY
-# define XTS_CHAIN_TWEAK
-# define __ARM_ARCH__ __LINUX_ARM_ARCH__
-# define __ARM_MAX_ARCH__ 7
-#endif
-
-#ifdef __thumb__
-# define adrl adr
-#endif
-
-#if __ARM_MAX_ARCH__>=7
-.arch armv7-a
-.fpu neon
-
-.text
-.syntax unified @ ARMv7-capable assembler is expected to handle this
-#ifdef __thumb2__
-.thumb
-#else
-.code 32
-#endif
-
-.type _bsaes_decrypt8,%function
-.align 4
-_bsaes_decrypt8:
- adr $const,_bsaes_decrypt8
- vldmia $key!, {@XMM[9]} @ round 0 key
- add $const,$const,#.LM0ISR-_bsaes_decrypt8
-
- vldmia $const!, {@XMM[8]} @ .LM0ISR
- veor @XMM[10], @XMM[0], @XMM[9] @ xor with round0 key
- veor @XMM[11], @XMM[1], @XMM[9]
- vtbl.8 `&Dlo(@XMM[0])`, {@XMM[10]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[0])`, {@XMM[10]}, `&Dhi(@XMM[8])`
- veor @XMM[12], @XMM[2], @XMM[9]
- vtbl.8 `&Dlo(@XMM[1])`, {@XMM[11]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[1])`, {@XMM[11]}, `&Dhi(@XMM[8])`
- veor @XMM[13], @XMM[3], @XMM[9]
- vtbl.8 `&Dlo(@XMM[2])`, {@XMM[12]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[2])`, {@XMM[12]}, `&Dhi(@XMM[8])`
- veor @XMM[14], @XMM[4], @XMM[9]
- vtbl.8 `&Dlo(@XMM[3])`, {@XMM[13]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[3])`, {@XMM[13]}, `&Dhi(@XMM[8])`
- veor @XMM[15], @XMM[5], @XMM[9]
- vtbl.8 `&Dlo(@XMM[4])`, {@XMM[14]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[4])`, {@XMM[14]}, `&Dhi(@XMM[8])`
- veor @XMM[10], @XMM[6], @XMM[9]
- vtbl.8 `&Dlo(@XMM[5])`, {@XMM[15]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[5])`, {@XMM[15]}, `&Dhi(@XMM[8])`
- veor @XMM[11], @XMM[7], @XMM[9]
- vtbl.8 `&Dlo(@XMM[6])`, {@XMM[10]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[6])`, {@XMM[10]}, `&Dhi(@XMM[8])`
- vtbl.8 `&Dlo(@XMM[7])`, {@XMM[11]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[7])`, {@XMM[11]}, `&Dhi(@XMM[8])`
-___
- &bitslice (@XMM[0..7, 8..11]);
-$code.=<<___;
- sub $rounds,$rounds,#1
- b .Ldec_sbox
-.align 4
-.Ldec_loop:
-___
- &ShiftRows (@XMM[0..7, 8..12]);
-$code.=".Ldec_sbox:\n";
- &InvSbox (@XMM[0..7, 8..15]);
-$code.=<<___;
- subs $rounds,$rounds,#1
- bcc .Ldec_done
-___
- &InvMixColumns (@XMM[0,1,6,4,2,7,3,5, 8..15]);
-$code.=<<___;
- vldmia $const, {@XMM[12]} @ .LISR
- ite eq @ Thumb2 thing, sanity check in ARM
- addeq $const,$const,#0x10
- bne .Ldec_loop
- vldmia $const, {@XMM[12]} @ .LISRM0
- b .Ldec_loop
-.align 4
-.Ldec_done:
-___
- &bitslice (@XMM[0,1,6,4,2,7,3,5, 8..11]);
-$code.=<<___;
- vldmia $key, {@XMM[8]} @ last round key
- veor @XMM[6], @XMM[6], @XMM[8]
- veor @XMM[4], @XMM[4], @XMM[8]
- veor @XMM[2], @XMM[2], @XMM[8]
- veor @XMM[7], @XMM[7], @XMM[8]
- veor @XMM[3], @XMM[3], @XMM[8]
- veor @XMM[5], @XMM[5], @XMM[8]
- veor @XMM[0], @XMM[0], @XMM[8]
- veor @XMM[1], @XMM[1], @XMM[8]
- bx lr
-.size _bsaes_decrypt8,.-_bsaes_decrypt8
-
-.type _bsaes_const,%object
-.align 6
-_bsaes_const:
-.LM0ISR: @ InvShiftRows constants
- .quad 0x0a0e0206070b0f03, 0x0004080c0d010509
-.LISR:
- .quad 0x0504070602010003, 0x0f0e0d0c080b0a09
-.LISRM0:
- .quad 0x01040b0e0205080f, 0x0306090c00070a0d
-.LM0SR: @ ShiftRows constants
- .quad 0x0a0e02060f03070b, 0x0004080c05090d01
-.LSR:
- .quad 0x0504070600030201, 0x0f0e0d0c0a09080b
-.LSRM0:
- .quad 0x0304090e00050a0f, 0x01060b0c0207080d
-.LM0:
- .quad 0x02060a0e03070b0f, 0x0004080c0105090d
-.LREVM0SR:
- .quad 0x090d01050c000408, 0x03070b0f060a0e02
-.asciz "Bit-sliced AES for NEON, CRYPTOGAMS by <appro\@openssl.org>"
-.align 6
-.size _bsaes_const,.-_bsaes_const
-
-.type _bsaes_encrypt8,%function
-.align 4
-_bsaes_encrypt8:
- adr $const,_bsaes_encrypt8
- vldmia $key!, {@XMM[9]} @ round 0 key
- sub $const,$const,#_bsaes_encrypt8-.LM0SR
-
- vldmia $const!, {@XMM[8]} @ .LM0SR
-_bsaes_encrypt8_alt:
- veor @XMM[10], @XMM[0], @XMM[9] @ xor with round0 key
- veor @XMM[11], @XMM[1], @XMM[9]
- vtbl.8 `&Dlo(@XMM[0])`, {@XMM[10]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[0])`, {@XMM[10]}, `&Dhi(@XMM[8])`
- veor @XMM[12], @XMM[2], @XMM[9]
- vtbl.8 `&Dlo(@XMM[1])`, {@XMM[11]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[1])`, {@XMM[11]}, `&Dhi(@XMM[8])`
- veor @XMM[13], @XMM[3], @XMM[9]
- vtbl.8 `&Dlo(@XMM[2])`, {@XMM[12]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[2])`, {@XMM[12]}, `&Dhi(@XMM[8])`
- veor @XMM[14], @XMM[4], @XMM[9]
- vtbl.8 `&Dlo(@XMM[3])`, {@XMM[13]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[3])`, {@XMM[13]}, `&Dhi(@XMM[8])`
- veor @XMM[15], @XMM[5], @XMM[9]
- vtbl.8 `&Dlo(@XMM[4])`, {@XMM[14]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[4])`, {@XMM[14]}, `&Dhi(@XMM[8])`
- veor @XMM[10], @XMM[6], @XMM[9]
- vtbl.8 `&Dlo(@XMM[5])`, {@XMM[15]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[5])`, {@XMM[15]}, `&Dhi(@XMM[8])`
- veor @XMM[11], @XMM[7], @XMM[9]
- vtbl.8 `&Dlo(@XMM[6])`, {@XMM[10]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[6])`, {@XMM[10]}, `&Dhi(@XMM[8])`
- vtbl.8 `&Dlo(@XMM[7])`, {@XMM[11]}, `&Dlo(@XMM[8])`
- vtbl.8 `&Dhi(@XMM[7])`, {@XMM[11]}, `&Dhi(@XMM[8])`
-_bsaes_encrypt8_bitslice:
-___
- &bitslice (@XMM[0..7, 8..11]);
-$code.=<<___;
- sub $rounds,$rounds,#1
- b .Lenc_sbox
-.align 4
-.Lenc_loop:
-___
- &ShiftRows (@XMM[0..7, 8..12]);
-$code.=".Lenc_sbox:\n";
- &Sbox (@XMM[0..7, 8..15]);
-$code.=<<___;
- subs $rounds,$rounds,#1
- bcc .Lenc_done
-___
- &MixColumns (@XMM[0,1,4,6,3,7,2,5, 8..15]);
-$code.=<<___;
- vldmia $const, {@XMM[12]} @ .LSR
- ite eq @ Thumb2 thing, samity check in ARM
- addeq $const,$const,#0x10
- bne .Lenc_loop
- vldmia $const, {@XMM[12]} @ .LSRM0
- b .Lenc_loop
-.align 4
-.Lenc_done:
-___
- # output in lsb > [t0, t1, t4, t6, t3, t7, t2, t5] < msb
- &bitslice (@XMM[0,1,4,6,3,7,2,5, 8..11]);
-$code.=<<___;
- vldmia $key, {@XMM[8]} @ last round key
- veor @XMM[4], @XMM[4], @XMM[8]
- veor @XMM[6], @XMM[6], @XMM[8]
- veor @XMM[3], @XMM[3], @XMM[8]
- veor @XMM[7], @XMM[7], @XMM[8]
- veor @XMM[2], @XMM[2], @XMM[8]
- veor @XMM[5], @XMM[5], @XMM[8]
- veor @XMM[0], @XMM[0], @XMM[8]
- veor @XMM[1], @XMM[1], @XMM[8]
- bx lr
-.size _bsaes_encrypt8,.-_bsaes_encrypt8
-___
-}
-{
-my ($out,$inp,$rounds,$const)=("r12","r4","r5","r6");
-
-sub bitslice_key {
-my @x=reverse(@_[0..7]);
-my ($bs0,$bs1,$bs2,$t2,$t3)=@_[8..12];
-
- &swapmove (@x[0,1],1,$bs0,$t2,$t3);
-$code.=<<___;
- @ &swapmove(@x[2,3],1,$t0,$t2,$t3);
- vmov @x[2], @x[0]
- vmov @x[3], @x[1]
-___
- #&swapmove2x(@x[4,5,6,7],1,$t0,$t2,$t3);
-
- &swapmove2x (@x[0,2,1,3],2,$bs1,$t2,$t3);
-$code.=<<___;
- @ &swapmove2x(@x[4,6,5,7],2,$t1,$t2,$t3);
- vmov @x[4], @x[0]
- vmov @x[6], @x[2]
- vmov @x[5], @x[1]
- vmov @x[7], @x[3]
-___
- &swapmove2x (@x[0,4,1,5],4,$bs2,$t2,$t3);
- &swapmove2x (@x[2,6,3,7],4,$bs2,$t2,$t3);
-}
-
-$code.=<<___;
-.type _bsaes_key_convert,%function
-.align 4
-_bsaes_key_convert:
- adr $const,_bsaes_key_convert
- vld1.8 {@XMM[7]}, [$inp]! @ load round 0 key
- sub $const,$const,#_bsaes_key_convert-.LM0
- vld1.8 {@XMM[15]}, [$inp]! @ load round 1 key
-
- vmov.i8 @XMM[8], #0x01 @ bit masks
- vmov.i8 @XMM[9], #0x02
- vmov.i8 @XMM[10], #0x04
- vmov.i8 @XMM[11], #0x08
- vmov.i8 @XMM[12], #0x10
- vmov.i8 @XMM[13], #0x20
- vldmia $const, {@XMM[14]} @ .LM0
-
-#ifdef __ARMEL__
- vrev32.8 @XMM[7], @XMM[7]
- vrev32.8 @XMM[15], @XMM[15]
-#endif
- sub $rounds,$rounds,#1
- vstmia $out!, {@XMM[7]} @ save round 0 key
- b .Lkey_loop
-
-.align 4
-.Lkey_loop:
- vtbl.8 `&Dlo(@XMM[7])`,{@XMM[15]},`&Dlo(@XMM[14])`
- vtbl.8 `&Dhi(@XMM[7])`,{@XMM[15]},`&Dhi(@XMM[14])`
- vmov.i8 @XMM[6], #0x40
- vmov.i8 @XMM[15], #0x80
-
- vtst.8 @XMM[0], @XMM[7], @XMM[8]
- vtst.8 @XMM[1], @XMM[7], @XMM[9]
- vtst.8 @XMM[2], @XMM[7], @XMM[10]
- vtst.8 @XMM[3], @XMM[7], @XMM[11]
- vtst.8 @XMM[4], @XMM[7], @XMM[12]
- vtst.8 @XMM[5], @XMM[7], @XMM[13]
- vtst.8 @XMM[6], @XMM[7], @XMM[6]
- vtst.8 @XMM[7], @XMM[7], @XMM[15]
- vld1.8 {@XMM[15]}, [$inp]! @ load next round key
- vmvn @XMM[0], @XMM[0] @ "pnot"
- vmvn @XMM[1], @XMM[1]
- vmvn @XMM[5], @XMM[5]
- vmvn @XMM[6], @XMM[6]
-#ifdef __ARMEL__
- vrev32.8 @XMM[15], @XMM[15]
-#endif
- subs $rounds,$rounds,#1
- vstmia $out!,{@XMM[0]-@XMM[7]} @ write bit-sliced round key
- bne .Lkey_loop
-
- vmov.i8 @XMM[7],#0x63 @ compose .L63
- @ don't save last round key
- bx lr
-.size _bsaes_key_convert,.-_bsaes_key_convert
-___
-}
-
-if (0) { # following four functions are unsupported interface
- # used for benchmarking...
-$code.=<<___;
-.globl bsaes_enc_key_convert
-.type bsaes_enc_key_convert,%function
-.align 4
-bsaes_enc_key_convert:
- stmdb sp!,{r4-r6,lr}
- vstmdb sp!,{d8-d15} @ ABI specification says so
-
- ldr r5,[$inp,#240] @ pass rounds
- mov r4,$inp @ pass key
- mov r12,$out @ pass key schedule
- bl _bsaes_key_convert
- veor @XMM[7],@XMM[7],@XMM[15] @ fix up last round key
- vstmia r12, {@XMM[7]} @ save last round key
-
- vldmia sp!,{d8-d15}
- ldmia sp!,{r4-r6,pc}
-.size bsaes_enc_key_convert,.-bsaes_enc_key_convert
-
-.globl bsaes_encrypt_128
-.type bsaes_encrypt_128,%function
-.align 4
-bsaes_encrypt_128:
- stmdb sp!,{r4-r6,lr}
- vstmdb sp!,{d8-d15} @ ABI specification says so
-.Lenc128_loop:
- vld1.8 {@XMM[0]-@XMM[1]}, [$inp]! @ load input
- vld1.8 {@XMM[2]-@XMM[3]}, [$inp]!
- mov r4,$key @ pass the key
- vld1.8 {@XMM[4]-@XMM[5]}, [$inp]!
- mov r5,#10 @ pass rounds
- vld1.8 {@XMM[6]-@XMM[7]}, [$inp]!
-
- bl _bsaes_encrypt8
-
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]! @ write output
- vst1.8 {@XMM[4]}, [$out]!
- vst1.8 {@XMM[6]}, [$out]!
- vst1.8 {@XMM[3]}, [$out]!
- vst1.8 {@XMM[7]}, [$out]!
- vst1.8 {@XMM[2]}, [$out]!
- subs $len,$len,#0x80
- vst1.8 {@XMM[5]}, [$out]!
- bhi .Lenc128_loop
-
- vldmia sp!,{d8-d15}
- ldmia sp!,{r4-r6,pc}
-.size bsaes_encrypt_128,.-bsaes_encrypt_128
-
-.globl bsaes_dec_key_convert
-.type bsaes_dec_key_convert,%function
-.align 4
-bsaes_dec_key_convert:
- stmdb sp!,{r4-r6,lr}
- vstmdb sp!,{d8-d15} @ ABI specification says so
-
- ldr r5,[$inp,#240] @ pass rounds
- mov r4,$inp @ pass key
- mov r12,$out @ pass key schedule
- bl _bsaes_key_convert
- vldmia $out, {@XMM[6]}
- vstmia r12, {@XMM[15]} @ save last round key
- veor @XMM[7], @XMM[7], @XMM[6] @ fix up round 0 key
- vstmia $out, {@XMM[7]}
-
- vldmia sp!,{d8-d15}
- ldmia sp!,{r4-r6,pc}
-.size bsaes_dec_key_convert,.-bsaes_dec_key_convert
-
-.globl bsaes_decrypt_128
-.type bsaes_decrypt_128,%function
-.align 4
-bsaes_decrypt_128:
- stmdb sp!,{r4-r6,lr}
- vstmdb sp!,{d8-d15} @ ABI specification says so
-.Ldec128_loop:
- vld1.8 {@XMM[0]-@XMM[1]}, [$inp]! @ load input
- vld1.8 {@XMM[2]-@XMM[3]}, [$inp]!
- mov r4,$key @ pass the key
- vld1.8 {@XMM[4]-@XMM[5]}, [$inp]!
- mov r5,#10 @ pass rounds
- vld1.8 {@XMM[6]-@XMM[7]}, [$inp]!
-
- bl _bsaes_decrypt8
-
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]! @ write output
- vst1.8 {@XMM[6]}, [$out]!
- vst1.8 {@XMM[4]}, [$out]!
- vst1.8 {@XMM[2]}, [$out]!
- vst1.8 {@XMM[7]}, [$out]!
- vst1.8 {@XMM[3]}, [$out]!
- subs $len,$len,#0x80
- vst1.8 {@XMM[5]}, [$out]!
- bhi .Ldec128_loop
-
- vldmia sp!,{d8-d15}
- ldmia sp!,{r4-r6,pc}
-.size bsaes_decrypt_128,.-bsaes_decrypt_128
-___
-}
-{
-my ($inp,$out,$len,$key, $ivp,$fp,$rounds)=map("r$_",(0..3,8..10));
-my ($keysched)=("sp");
-
-$code.=<<___;
-.extern AES_cbc_encrypt
-.extern AES_decrypt
-
-.global bsaes_cbc_encrypt
-.type bsaes_cbc_encrypt,%function
-.align 5
-bsaes_cbc_encrypt:
-#ifndef __KERNEL__
- cmp $len, #128
-#ifndef __thumb__
- blo AES_cbc_encrypt
-#else
- bhs 1f
- b AES_cbc_encrypt
-1:
-#endif
-#endif
-
- @ it is up to the caller to make sure we are called with enc == 0
-
- mov ip, sp
- stmdb sp!, {r4-r10, lr}
- VFP_ABI_PUSH
- ldr $ivp, [ip] @ IV is 1st arg on the stack
- mov $len, $len, lsr#4 @ len in 16 byte blocks
- sub sp, #0x10 @ scratch space to carry over the IV
- mov $fp, sp @ save sp
-
- ldr $rounds, [$key, #240] @ get # of rounds
-#ifndef BSAES_ASM_EXTENDED_KEY
- @ allocate the key schedule on the stack
- sub r12, sp, $rounds, lsl#7 @ 128 bytes per inner round key
- add r12, #`128-32` @ sifze of bit-slices key schedule
-
- @ populate the key schedule
- mov r4, $key @ pass key
- mov r5, $rounds @ pass # of rounds
- mov sp, r12 @ sp is $keysched
- bl _bsaes_key_convert
- vldmia $keysched, {@XMM[6]}
- vstmia r12, {@XMM[15]} @ save last round key
- veor @XMM[7], @XMM[7], @XMM[6] @ fix up round 0 key
- vstmia $keysched, {@XMM[7]}
-#else
- ldr r12, [$key, #244]
- eors r12, #1
- beq 0f
-
- @ populate the key schedule
- str r12, [$key, #244]
- mov r4, $key @ pass key
- mov r5, $rounds @ pass # of rounds
- add r12, $key, #248 @ pass key schedule
- bl _bsaes_key_convert
- add r4, $key, #248
- vldmia r4, {@XMM[6]}
- vstmia r12, {@XMM[15]} @ save last round key
- veor @XMM[7], @XMM[7], @XMM[6] @ fix up round 0 key
- vstmia r4, {@XMM[7]}
-
-.align 2
-0:
-#endif
-
- vld1.8 {@XMM[15]}, [$ivp] @ load IV
- b .Lcbc_dec_loop
-
-.align 4
-.Lcbc_dec_loop:
- subs $len, $len, #0x8
- bmi .Lcbc_dec_loop_finish
-
- vld1.8 {@XMM[0]-@XMM[1]}, [$inp]! @ load input
- vld1.8 {@XMM[2]-@XMM[3]}, [$inp]!
-#ifndef BSAES_ASM_EXTENDED_KEY
- mov r4, $keysched @ pass the key
-#else
- add r4, $key, #248
-#endif
- vld1.8 {@XMM[4]-@XMM[5]}, [$inp]!
- mov r5, $rounds
- vld1.8 {@XMM[6]-@XMM[7]}, [$inp]
- sub $inp, $inp, #0x60
- vstmia $fp, {@XMM[15]} @ put aside IV
-
- bl _bsaes_decrypt8
-
- vldmia $fp, {@XMM[14]} @ reload IV
- vld1.8 {@XMM[8]-@XMM[9]}, [$inp]! @ reload input
- veor @XMM[0], @XMM[0], @XMM[14] @ ^= IV
- vld1.8 {@XMM[10]-@XMM[11]}, [$inp]!
- veor @XMM[1], @XMM[1], @XMM[8]
- veor @XMM[6], @XMM[6], @XMM[9]
- vld1.8 {@XMM[12]-@XMM[13]}, [$inp]!
- veor @XMM[4], @XMM[4], @XMM[10]
- veor @XMM[2], @XMM[2], @XMM[11]
- vld1.8 {@XMM[14]-@XMM[15]}, [$inp]!
- veor @XMM[7], @XMM[7], @XMM[12]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]! @ write output
- veor @XMM[3], @XMM[3], @XMM[13]
- vst1.8 {@XMM[6]}, [$out]!
- veor @XMM[5], @XMM[5], @XMM[14]
- vst1.8 {@XMM[4]}, [$out]!
- vst1.8 {@XMM[2]}, [$out]!
- vst1.8 {@XMM[7]}, [$out]!
- vst1.8 {@XMM[3]}, [$out]!
- vst1.8 {@XMM[5]}, [$out]!
-
- b .Lcbc_dec_loop
-
-.Lcbc_dec_loop_finish:
- adds $len, $len, #8
- beq .Lcbc_dec_done
-
- vld1.8 {@XMM[0]}, [$inp]! @ load input
- cmp $len, #2
- blo .Lcbc_dec_one
- vld1.8 {@XMM[1]}, [$inp]!
-#ifndef BSAES_ASM_EXTENDED_KEY
- mov r4, $keysched @ pass the key
-#else
- add r4, $key, #248
-#endif
- mov r5, $rounds
- vstmia $fp, {@XMM[15]} @ put aside IV
- beq .Lcbc_dec_two
- vld1.8 {@XMM[2]}, [$inp]!
- cmp $len, #4
- blo .Lcbc_dec_three
- vld1.8 {@XMM[3]}, [$inp]!
- beq .Lcbc_dec_four
- vld1.8 {@XMM[4]}, [$inp]!
- cmp $len, #6
- blo .Lcbc_dec_five
- vld1.8 {@XMM[5]}, [$inp]!
- beq .Lcbc_dec_six
- vld1.8 {@XMM[6]}, [$inp]!
- sub $inp, $inp, #0x70
-
- bl _bsaes_decrypt8
-
- vldmia $fp, {@XMM[14]} @ reload IV
- vld1.8 {@XMM[8]-@XMM[9]}, [$inp]! @ reload input
- veor @XMM[0], @XMM[0], @XMM[14] @ ^= IV
- vld1.8 {@XMM[10]-@XMM[11]}, [$inp]!
- veor @XMM[1], @XMM[1], @XMM[8]
- veor @XMM[6], @XMM[6], @XMM[9]
- vld1.8 {@XMM[12]-@XMM[13]}, [$inp]!
- veor @XMM[4], @XMM[4], @XMM[10]
- veor @XMM[2], @XMM[2], @XMM[11]
- vld1.8 {@XMM[15]}, [$inp]!
- veor @XMM[7], @XMM[7], @XMM[12]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]! @ write output
- veor @XMM[3], @XMM[3], @XMM[13]
- vst1.8 {@XMM[6]}, [$out]!
- vst1.8 {@XMM[4]}, [$out]!
- vst1.8 {@XMM[2]}, [$out]!
- vst1.8 {@XMM[7]}, [$out]!
- vst1.8 {@XMM[3]}, [$out]!
- b .Lcbc_dec_done
-.align 4
-.Lcbc_dec_six:
- sub $inp, $inp, #0x60
- bl _bsaes_decrypt8
- vldmia $fp,{@XMM[14]} @ reload IV
- vld1.8 {@XMM[8]-@XMM[9]}, [$inp]! @ reload input
- veor @XMM[0], @XMM[0], @XMM[14] @ ^= IV
- vld1.8 {@XMM[10]-@XMM[11]}, [$inp]!
- veor @XMM[1], @XMM[1], @XMM[8]
- veor @XMM[6], @XMM[6], @XMM[9]
- vld1.8 {@XMM[12]}, [$inp]!
- veor @XMM[4], @XMM[4], @XMM[10]
- veor @XMM[2], @XMM[2], @XMM[11]
- vld1.8 {@XMM[15]}, [$inp]!
- veor @XMM[7], @XMM[7], @XMM[12]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]! @ write output
- vst1.8 {@XMM[6]}, [$out]!
- vst1.8 {@XMM[4]}, [$out]!
- vst1.8 {@XMM[2]}, [$out]!
- vst1.8 {@XMM[7]}, [$out]!
- b .Lcbc_dec_done
-.align 4
-.Lcbc_dec_five:
- sub $inp, $inp, #0x50
- bl _bsaes_decrypt8
- vldmia $fp, {@XMM[14]} @ reload IV
- vld1.8 {@XMM[8]-@XMM[9]}, [$inp]! @ reload input
- veor @XMM[0], @XMM[0], @XMM[14] @ ^= IV
- vld1.8 {@XMM[10]-@XMM[11]}, [$inp]!
- veor @XMM[1], @XMM[1], @XMM[8]
- veor @XMM[6], @XMM[6], @XMM[9]
- vld1.8 {@XMM[15]}, [$inp]!
- veor @XMM[4], @XMM[4], @XMM[10]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]! @ write output
- veor @XMM[2], @XMM[2], @XMM[11]
- vst1.8 {@XMM[6]}, [$out]!
- vst1.8 {@XMM[4]}, [$out]!
- vst1.8 {@XMM[2]}, [$out]!
- b .Lcbc_dec_done
-.align 4
-.Lcbc_dec_four:
- sub $inp, $inp, #0x40
- bl _bsaes_decrypt8
- vldmia $fp, {@XMM[14]} @ reload IV
- vld1.8 {@XMM[8]-@XMM[9]}, [$inp]! @ reload input
- veor @XMM[0], @XMM[0], @XMM[14] @ ^= IV
- vld1.8 {@XMM[10]}, [$inp]!
- veor @XMM[1], @XMM[1], @XMM[8]
- veor @XMM[6], @XMM[6], @XMM[9]
- vld1.8 {@XMM[15]}, [$inp]!
- veor @XMM[4], @XMM[4], @XMM[10]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]! @ write output
- vst1.8 {@XMM[6]}, [$out]!
- vst1.8 {@XMM[4]}, [$out]!
- b .Lcbc_dec_done
-.align 4
-.Lcbc_dec_three:
- sub $inp, $inp, #0x30
- bl _bsaes_decrypt8
- vldmia $fp, {@XMM[14]} @ reload IV
- vld1.8 {@XMM[8]-@XMM[9]}, [$inp]! @ reload input
- veor @XMM[0], @XMM[0], @XMM[14] @ ^= IV
- vld1.8 {@XMM[15]}, [$inp]!
- veor @XMM[1], @XMM[1], @XMM[8]
- veor @XMM[6], @XMM[6], @XMM[9]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]! @ write output
- vst1.8 {@XMM[6]}, [$out]!
- b .Lcbc_dec_done
-.align 4
-.Lcbc_dec_two:
- sub $inp, $inp, #0x20
- bl _bsaes_decrypt8
- vldmia $fp, {@XMM[14]} @ reload IV
- vld1.8 {@XMM[8]}, [$inp]! @ reload input
- veor @XMM[0], @XMM[0], @XMM[14] @ ^= IV
- vld1.8 {@XMM[15]}, [$inp]! @ reload input
- veor @XMM[1], @XMM[1], @XMM[8]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]! @ write output
- b .Lcbc_dec_done
-.align 4
-.Lcbc_dec_one:
- sub $inp, $inp, #0x10
- mov $rounds, $out @ save original out pointer
- mov $out, $fp @ use the iv scratch space as out buffer
- mov r2, $key
- vmov @XMM[4],@XMM[15] @ just in case ensure that IV
- vmov @XMM[5],@XMM[0] @ and input are preserved
- bl AES_decrypt
- vld1.8 {@XMM[0]}, [$fp,:64] @ load result
- veor @XMM[0], @XMM[0], @XMM[4] @ ^= IV
- vmov @XMM[15], @XMM[5] @ @XMM[5] holds input
- vst1.8 {@XMM[0]}, [$rounds] @ write output
-
-.Lcbc_dec_done:
-#ifndef BSAES_ASM_EXTENDED_KEY
- vmov.i32 q0, #0
- vmov.i32 q1, #0
-.Lcbc_dec_bzero: @ wipe key schedule [if any]
- vstmia $keysched!, {q0-q1}
- cmp $keysched, $fp
- bne .Lcbc_dec_bzero
-#endif
-
- mov sp, $fp
- add sp, #0x10 @ add sp,$fp,#0x10 is no good for thumb
- vst1.8 {@XMM[15]}, [$ivp] @ return IV
- VFP_ABI_POP
- ldmia sp!, {r4-r10, pc}
-.size bsaes_cbc_encrypt,.-bsaes_cbc_encrypt
-___
-}
-{
-my ($inp,$out,$len,$key, $ctr,$fp,$rounds)=(map("r$_",(0..3,8..10)));
-my $const = "r6"; # shared with _bsaes_encrypt8_alt
-my $keysched = "sp";
-
-$code.=<<___;
-.extern AES_encrypt
-.global bsaes_ctr32_encrypt_blocks
-.type bsaes_ctr32_encrypt_blocks,%function
-.align 5
-bsaes_ctr32_encrypt_blocks:
- cmp $len, #8 @ use plain AES for
- blo .Lctr_enc_short @ small sizes
-
- mov ip, sp
- stmdb sp!, {r4-r10, lr}
- VFP_ABI_PUSH
- ldr $ctr, [ip] @ ctr is 1st arg on the stack
- sub sp, sp, #0x10 @ scratch space to carry over the ctr
- mov $fp, sp @ save sp
-
- ldr $rounds, [$key, #240] @ get # of rounds
-#ifndef BSAES_ASM_EXTENDED_KEY
- @ allocate the key schedule on the stack
- sub r12, sp, $rounds, lsl#7 @ 128 bytes per inner round key
- add r12, #`128-32` @ size of bit-sliced key schedule
-
- @ populate the key schedule
- mov r4, $key @ pass key
- mov r5, $rounds @ pass # of rounds
- mov sp, r12 @ sp is $keysched
- bl _bsaes_key_convert
- veor @XMM[7],@XMM[7],@XMM[15] @ fix up last round key
- vstmia r12, {@XMM[7]} @ save last round key
-
- vld1.8 {@XMM[0]}, [$ctr] @ load counter
- add $ctr, $const, #.LREVM0SR-.LM0 @ borrow $ctr
- vldmia $keysched, {@XMM[4]} @ load round0 key
-#else
- ldr r12, [$key, #244]
- eors r12, #1
- beq 0f
-
- @ populate the key schedule
- str r12, [$key, #244]
- mov r4, $key @ pass key
- mov r5, $rounds @ pass # of rounds
- add r12, $key, #248 @ pass key schedule
- bl _bsaes_key_convert
- veor @XMM[7],@XMM[7],@XMM[15] @ fix up last round key
- vstmia r12, {@XMM[7]} @ save last round key
-
-.align 2
-0: add r12, $key, #248
- vld1.8 {@XMM[0]}, [$ctr] @ load counter
- adrl $ctr, .LREVM0SR @ borrow $ctr
- vldmia r12, {@XMM[4]} @ load round0 key
- sub sp, #0x10 @ place for adjusted round0 key
-#endif
-
- vmov.i32 @XMM[8],#1 @ compose 1<<96
- veor @XMM[9],@XMM[9],@XMM[9]
- vrev32.8 @XMM[0],@XMM[0]
- vext.8 @XMM[8],@XMM[9],@XMM[8],#4
- vrev32.8 @XMM[4],@XMM[4]
- vadd.u32 @XMM[9],@XMM[8],@XMM[8] @ compose 2<<96
- vstmia $keysched, {@XMM[4]} @ save adjusted round0 key
- b .Lctr_enc_loop
-
-.align 4
-.Lctr_enc_loop:
- vadd.u32 @XMM[10], @XMM[8], @XMM[9] @ compose 3<<96
- vadd.u32 @XMM[1], @XMM[0], @XMM[8] @ +1
- vadd.u32 @XMM[2], @XMM[0], @XMM[9] @ +2
- vadd.u32 @XMM[3], @XMM[0], @XMM[10] @ +3
- vadd.u32 @XMM[4], @XMM[1], @XMM[10]
- vadd.u32 @XMM[5], @XMM[2], @XMM[10]
- vadd.u32 @XMM[6], @XMM[3], @XMM[10]
- vadd.u32 @XMM[7], @XMM[4], @XMM[10]
- vadd.u32 @XMM[10], @XMM[5], @XMM[10] @ next counter
-
- @ Borrow prologue from _bsaes_encrypt8 to use the opportunity
- @ to flip byte order in 32-bit counter
-
- vldmia $keysched, {@XMM[9]} @ load round0 key
-#ifndef BSAES_ASM_EXTENDED_KEY
- add r4, $keysched, #0x10 @ pass next round key
-#else
- add r4, $key, #`248+16`
-#endif
- vldmia $ctr, {@XMM[8]} @ .LREVM0SR
- mov r5, $rounds @ pass rounds
- vstmia $fp, {@XMM[10]} @ save next counter
- sub $const, $ctr, #.LREVM0SR-.LSR @ pass constants
-
- bl _bsaes_encrypt8_alt
-
- subs $len, $len, #8
- blo .Lctr_enc_loop_done
-
- vld1.8 {@XMM[8]-@XMM[9]}, [$inp]! @ load input
- vld1.8 {@XMM[10]-@XMM[11]}, [$inp]!
- veor @XMM[0], @XMM[8]
- veor @XMM[1], @XMM[9]
- vld1.8 {@XMM[12]-@XMM[13]}, [$inp]!
- veor @XMM[4], @XMM[10]
- veor @XMM[6], @XMM[11]
- vld1.8 {@XMM[14]-@XMM[15]}, [$inp]!
- veor @XMM[3], @XMM[12]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]! @ write output
- veor @XMM[7], @XMM[13]
- veor @XMM[2], @XMM[14]
- vst1.8 {@XMM[4]}, [$out]!
- veor @XMM[5], @XMM[15]
- vst1.8 {@XMM[6]}, [$out]!
- vmov.i32 @XMM[8], #1 @ compose 1<<96
- vst1.8 {@XMM[3]}, [$out]!
- veor @XMM[9], @XMM[9], @XMM[9]
- vst1.8 {@XMM[7]}, [$out]!
- vext.8 @XMM[8], @XMM[9], @XMM[8], #4
- vst1.8 {@XMM[2]}, [$out]!
- vadd.u32 @XMM[9],@XMM[8],@XMM[8] @ compose 2<<96
- vst1.8 {@XMM[5]}, [$out]!
- vldmia $fp, {@XMM[0]} @ load counter
-
- bne .Lctr_enc_loop
- b .Lctr_enc_done
-
-.align 4
-.Lctr_enc_loop_done:
- add $len, $len, #8
- vld1.8 {@XMM[8]}, [$inp]! @ load input
- veor @XMM[0], @XMM[8]
- vst1.8 {@XMM[0]}, [$out]! @ write output
- cmp $len, #2
- blo .Lctr_enc_done
- vld1.8 {@XMM[9]}, [$inp]!
- veor @XMM[1], @XMM[9]
- vst1.8 {@XMM[1]}, [$out]!
- beq .Lctr_enc_done
- vld1.8 {@XMM[10]}, [$inp]!
- veor @XMM[4], @XMM[10]
- vst1.8 {@XMM[4]}, [$out]!
- cmp $len, #4
- blo .Lctr_enc_done
- vld1.8 {@XMM[11]}, [$inp]!
- veor @XMM[6], @XMM[11]
- vst1.8 {@XMM[6]}, [$out]!
- beq .Lctr_enc_done
- vld1.8 {@XMM[12]}, [$inp]!
- veor @XMM[3], @XMM[12]
- vst1.8 {@XMM[3]}, [$out]!
- cmp $len, #6
- blo .Lctr_enc_done
- vld1.8 {@XMM[13]}, [$inp]!
- veor @XMM[7], @XMM[13]
- vst1.8 {@XMM[7]}, [$out]!
- beq .Lctr_enc_done
- vld1.8 {@XMM[14]}, [$inp]
- veor @XMM[2], @XMM[14]
- vst1.8 {@XMM[2]}, [$out]!
-
-.Lctr_enc_done:
- vmov.i32 q0, #0
- vmov.i32 q1, #0
-#ifndef BSAES_ASM_EXTENDED_KEY
-.Lctr_enc_bzero: @ wipe key schedule [if any]
- vstmia $keysched!, {q0-q1}
- cmp $keysched, $fp
- bne .Lctr_enc_bzero
-#else
- vstmia $keysched, {q0-q1}
-#endif
-
- mov sp, $fp
- add sp, #0x10 @ add sp,$fp,#0x10 is no good for thumb
- VFP_ABI_POP
- ldmia sp!, {r4-r10, pc} @ return
-
-.align 4
-.Lctr_enc_short:
- ldr ip, [sp] @ ctr pointer is passed on stack
- stmdb sp!, {r4-r8, lr}
-
- mov r4, $inp @ copy arguments
- mov r5, $out
- mov r6, $len
- mov r7, $key
- ldr r8, [ip, #12] @ load counter LSW
- vld1.8 {@XMM[1]}, [ip] @ load whole counter value
-#ifdef __ARMEL__
- rev r8, r8
-#endif
- sub sp, sp, #0x10
- vst1.8 {@XMM[1]}, [sp,:64] @ copy counter value
- sub sp, sp, #0x10
-
-.Lctr_enc_short_loop:
- add r0, sp, #0x10 @ input counter value
- mov r1, sp @ output on the stack
- mov r2, r7 @ key
-
- bl AES_encrypt
-
- vld1.8 {@XMM[0]}, [r4]! @ load input
- vld1.8 {@XMM[1]}, [sp,:64] @ load encrypted counter
- add r8, r8, #1
-#ifdef __ARMEL__
- rev r0, r8
- str r0, [sp, #0x1c] @ next counter value
-#else
- str r8, [sp, #0x1c] @ next counter value
-#endif
- veor @XMM[0],@XMM[0],@XMM[1]
- vst1.8 {@XMM[0]}, [r5]! @ store output
- subs r6, r6, #1
- bne .Lctr_enc_short_loop
-
- vmov.i32 q0, #0
- vmov.i32 q1, #0
- vstmia sp!, {q0-q1}
-
- ldmia sp!, {r4-r8, pc}
-.size bsaes_ctr32_encrypt_blocks,.-bsaes_ctr32_encrypt_blocks
-___
-}
-{
-######################################################################
-# void bsaes_xts_[en|de]crypt(const char *inp,char *out,size_t len,
-# const AES_KEY *key1, const AES_KEY *key2,
-# const unsigned char iv[16]);
-#
-my ($inp,$out,$len,$key,$rounds,$magic,$fp)=(map("r$_",(7..10,1..3)));
-my $const="r6"; # returned by _bsaes_key_convert
-my $twmask=@XMM[5];
-my @T=@XMM[6..7];
-
-$code.=<<___;
-.globl bsaes_xts_encrypt
-.type bsaes_xts_encrypt,%function
-.align 4
-bsaes_xts_encrypt:
- mov ip, sp
- stmdb sp!, {r4-r10, lr} @ 0x20
- VFP_ABI_PUSH
- mov r6, sp @ future $fp
-
- mov $inp, r0
- mov $out, r1
- mov $len, r2
- mov $key, r3
-
- sub r0, sp, #0x10 @ 0x10
- bic r0, #0xf @ align at 16 bytes
- mov sp, r0
-
-#ifdef XTS_CHAIN_TWEAK
- ldr r0, [ip] @ pointer to input tweak
-#else
- @ generate initial tweak
- ldr r0, [ip, #4] @ iv[]
- mov r1, sp
- ldr r2, [ip, #0] @ key2
- bl AES_encrypt
- mov r0,sp @ pointer to initial tweak
-#endif
-
- ldr $rounds, [$key, #240] @ get # of rounds
- mov $fp, r6
-#ifndef BSAES_ASM_EXTENDED_KEY
- @ allocate the key schedule on the stack
- sub r12, sp, $rounds, lsl#7 @ 128 bytes per inner round key
- @ add r12, #`128-32` @ size of bit-sliced key schedule
- sub r12, #`32+16` @ place for tweak[9]
-
- @ populate the key schedule
- mov r4, $key @ pass key
- mov r5, $rounds @ pass # of rounds
- mov sp, r12
- add r12, #0x90 @ pass key schedule
- bl _bsaes_key_convert
- veor @XMM[7], @XMM[7], @XMM[15] @ fix up last round key
- vstmia r12, {@XMM[7]} @ save last round key
-#else
- ldr r12, [$key, #244]
- eors r12, #1
- beq 0f
-
- str r12, [$key, #244]
- mov r4, $key @ pass key
- mov r5, $rounds @ pass # of rounds
- add r12, $key, #248 @ pass key schedule
- bl _bsaes_key_convert
- veor @XMM[7], @XMM[7], @XMM[15] @ fix up last round key
- vstmia r12, {@XMM[7]}
-
-.align 2
-0: sub sp, #0x90 @ place for tweak[9]
-#endif
-
- vld1.8 {@XMM[8]}, [r0] @ initial tweak
- adr $magic, .Lxts_magic
-
- subs $len, #0x80
- blo .Lxts_enc_short
- b .Lxts_enc_loop
-
-.align 4
-.Lxts_enc_loop:
- vldmia $magic, {$twmask} @ load XTS magic
- vshr.s64 @T[0], @XMM[8], #63
- mov r0, sp
- vand @T[0], @T[0], $twmask
-___
-for($i=9;$i<16;$i++) {
-$code.=<<___;
- vadd.u64 @XMM[$i], @XMM[$i-1], @XMM[$i-1]
- vst1.64 {@XMM[$i-1]}, [r0,:128]!
- vswp `&Dhi("@T[0]")`,`&Dlo("@T[0]")`
- vshr.s64 @T[1], @XMM[$i], #63
- veor @XMM[$i], @XMM[$i], @T[0]
- vand @T[1], @T[1], $twmask
-___
- @T=reverse(@T);
-
-$code.=<<___ if ($i>=10);
- vld1.8 {@XMM[$i-10]}, [$inp]!
-___
-$code.=<<___ if ($i>=11);
- veor @XMM[$i-11], @XMM[$i-11], @XMM[$i-3]
-___
-}
-$code.=<<___;
- vadd.u64 @XMM[8], @XMM[15], @XMM[15]
- vst1.64 {@XMM[15]}, [r0,:128]!
- vswp `&Dhi("@T[0]")`,`&Dlo("@T[0]")`
- veor @XMM[8], @XMM[8], @T[0]
- vst1.64 {@XMM[8]}, [r0,:128] @ next round tweak
-
- vld1.8 {@XMM[6]-@XMM[7]}, [$inp]!
- veor @XMM[5], @XMM[5], @XMM[13]
-#ifndef BSAES_ASM_EXTENDED_KEY
- add r4, sp, #0x90 @ pass key schedule
-#else
- add r4, $key, #248 @ pass key schedule
-#endif
- veor @XMM[6], @XMM[6], @XMM[14]
- mov r5, $rounds @ pass rounds
- veor @XMM[7], @XMM[7], @XMM[15]
- mov r0, sp
-
- bl _bsaes_encrypt8
-
- vld1.64 {@XMM[ 8]-@XMM[ 9]}, [r0,:128]!
- vld1.64 {@XMM[10]-@XMM[11]}, [r0,:128]!
- veor @XMM[0], @XMM[0], @XMM[ 8]
- vld1.64 {@XMM[12]-@XMM[13]}, [r0,:128]!
- veor @XMM[1], @XMM[1], @XMM[ 9]
- veor @XMM[8], @XMM[4], @XMM[10]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]!
- veor @XMM[9], @XMM[6], @XMM[11]
- vld1.64 {@XMM[14]-@XMM[15]}, [r0,:128]!
- veor @XMM[10], @XMM[3], @XMM[12]
- vst1.8 {@XMM[8]-@XMM[9]}, [$out]!
- veor @XMM[11], @XMM[7], @XMM[13]
- veor @XMM[12], @XMM[2], @XMM[14]
- vst1.8 {@XMM[10]-@XMM[11]}, [$out]!
- veor @XMM[13], @XMM[5], @XMM[15]
- vst1.8 {@XMM[12]-@XMM[13]}, [$out]!
-
- vld1.64 {@XMM[8]}, [r0,:128] @ next round tweak
-
- subs $len, #0x80
- bpl .Lxts_enc_loop
-
-.Lxts_enc_short:
- adds $len, #0x70
- bmi .Lxts_enc_done
-
- vldmia $magic, {$twmask} @ load XTS magic
- vshr.s64 @T[0], @XMM[8], #63
- mov r0, sp
- vand @T[0], @T[0], $twmask
-___
-for($i=9;$i<16;$i++) {
-$code.=<<___;
- vadd.u64 @XMM[$i], @XMM[$i-1], @XMM[$i-1]
- vst1.64 {@XMM[$i-1]}, [r0,:128]!
- vswp `&Dhi("@T[0]")`,`&Dlo("@T[0]")`
- vshr.s64 @T[1], @XMM[$i], #63
- veor @XMM[$i], @XMM[$i], @T[0]
- vand @T[1], @T[1], $twmask
-___
- @T=reverse(@T);
-
-$code.=<<___ if ($i>=10);
- vld1.8 {@XMM[$i-10]}, [$inp]!
- subs $len, #0x10
- bmi .Lxts_enc_`$i-9`
-___
-$code.=<<___ if ($i>=11);
- veor @XMM[$i-11], @XMM[$i-11], @XMM[$i-3]
-___
-}
-$code.=<<___;
- sub $len, #0x10
- vst1.64 {@XMM[15]}, [r0,:128] @ next round tweak
-
- vld1.8 {@XMM[6]}, [$inp]!
- veor @XMM[5], @XMM[5], @XMM[13]
-#ifndef BSAES_ASM_EXTENDED_KEY
- add r4, sp, #0x90 @ pass key schedule
-#else
- add r4, $key, #248 @ pass key schedule
-#endif
- veor @XMM[6], @XMM[6], @XMM[14]
- mov r5, $rounds @ pass rounds
- mov r0, sp
-
- bl _bsaes_encrypt8
-
- vld1.64 {@XMM[ 8]-@XMM[ 9]}, [r0,:128]!
- vld1.64 {@XMM[10]-@XMM[11]}, [r0,:128]!
- veor @XMM[0], @XMM[0], @XMM[ 8]
- vld1.64 {@XMM[12]-@XMM[13]}, [r0,:128]!
- veor @XMM[1], @XMM[1], @XMM[ 9]
- veor @XMM[8], @XMM[4], @XMM[10]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]!
- veor @XMM[9], @XMM[6], @XMM[11]
- vld1.64 {@XMM[14]}, [r0,:128]!
- veor @XMM[10], @XMM[3], @XMM[12]
- vst1.8 {@XMM[8]-@XMM[9]}, [$out]!
- veor @XMM[11], @XMM[7], @XMM[13]
- veor @XMM[12], @XMM[2], @XMM[14]
- vst1.8 {@XMM[10]-@XMM[11]}, [$out]!
- vst1.8 {@XMM[12]}, [$out]!
-
- vld1.64 {@XMM[8]}, [r0,:128] @ next round tweak
- b .Lxts_enc_done
-.align 4
-.Lxts_enc_6:
- vst1.64 {@XMM[14]}, [r0,:128] @ next round tweak
-
- veor @XMM[4], @XMM[4], @XMM[12]
-#ifndef BSAES_ASM_EXTENDED_KEY
- add r4, sp, #0x90 @ pass key schedule
-#else
- add r4, $key, #248 @ pass key schedule
-#endif
- veor @XMM[5], @XMM[5], @XMM[13]
- mov r5, $rounds @ pass rounds
- mov r0, sp
-
- bl _bsaes_encrypt8
-
- vld1.64 {@XMM[ 8]-@XMM[ 9]}, [r0,:128]!
- vld1.64 {@XMM[10]-@XMM[11]}, [r0,:128]!
- veor @XMM[0], @XMM[0], @XMM[ 8]
- vld1.64 {@XMM[12]-@XMM[13]}, [r0,:128]!
- veor @XMM[1], @XMM[1], @XMM[ 9]
- veor @XMM[8], @XMM[4], @XMM[10]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]!
- veor @XMM[9], @XMM[6], @XMM[11]
- veor @XMM[10], @XMM[3], @XMM[12]
- vst1.8 {@XMM[8]-@XMM[9]}, [$out]!
- veor @XMM[11], @XMM[7], @XMM[13]
- vst1.8 {@XMM[10]-@XMM[11]}, [$out]!
-
- vld1.64 {@XMM[8]}, [r0,:128] @ next round tweak
- b .Lxts_enc_done
-
-@ put this in range for both ARM and Thumb mode adr instructions
-.align 5
-.Lxts_magic:
- .quad 1, 0x87
-
-.align 5
-.Lxts_enc_5:
- vst1.64 {@XMM[13]}, [r0,:128] @ next round tweak
-
- veor @XMM[3], @XMM[3], @XMM[11]
-#ifndef BSAES_ASM_EXTENDED_KEY
- add r4, sp, #0x90 @ pass key schedule
-#else
- add r4, $key, #248 @ pass key schedule
-#endif
- veor @XMM[4], @XMM[4], @XMM[12]
- mov r5, $rounds @ pass rounds
- mov r0, sp
-
- bl _bsaes_encrypt8
-
- vld1.64 {@XMM[ 8]-@XMM[ 9]}, [r0,:128]!
- vld1.64 {@XMM[10]-@XMM[11]}, [r0,:128]!
- veor @XMM[0], @XMM[0], @XMM[ 8]
- vld1.64 {@XMM[12]}, [r0,:128]!
- veor @XMM[1], @XMM[1], @XMM[ 9]
- veor @XMM[8], @XMM[4], @XMM[10]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]!
- veor @XMM[9], @XMM[6], @XMM[11]
- veor @XMM[10], @XMM[3], @XMM[12]
- vst1.8 {@XMM[8]-@XMM[9]}, [$out]!
- vst1.8 {@XMM[10]}, [$out]!
-
- vld1.64 {@XMM[8]}, [r0,:128] @ next round tweak
- b .Lxts_enc_done
-.align 4
-.Lxts_enc_4:
- vst1.64 {@XMM[12]}, [r0,:128] @ next round tweak
-
- veor @XMM[2], @XMM[2], @XMM[10]
-#ifndef BSAES_ASM_EXTENDED_KEY
- add r4, sp, #0x90 @ pass key schedule
-#else
- add r4, $key, #248 @ pass key schedule
-#endif
- veor @XMM[3], @XMM[3], @XMM[11]
- mov r5, $rounds @ pass rounds
- mov r0, sp
-
- bl _bsaes_encrypt8
-
- vld1.64 {@XMM[ 8]-@XMM[ 9]}, [r0,:128]!
- vld1.64 {@XMM[10]-@XMM[11]}, [r0,:128]!
- veor @XMM[0], @XMM[0], @XMM[ 8]
- veor @XMM[1], @XMM[1], @XMM[ 9]
- veor @XMM[8], @XMM[4], @XMM[10]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]!
- veor @XMM[9], @XMM[6], @XMM[11]
- vst1.8 {@XMM[8]-@XMM[9]}, [$out]!
-
- vld1.64 {@XMM[8]}, [r0,:128] @ next round tweak
- b .Lxts_enc_done
-.align 4
-.Lxts_enc_3:
- vst1.64 {@XMM[11]}, [r0,:128] @ next round tweak
-
- veor @XMM[1], @XMM[1], @XMM[9]
-#ifndef BSAES_ASM_EXTENDED_KEY
- add r4, sp, #0x90 @ pass key schedule
-#else
- add r4, $key, #248 @ pass key schedule
-#endif
- veor @XMM[2], @XMM[2], @XMM[10]
- mov r5, $rounds @ pass rounds
- mov r0, sp
-
- bl _bsaes_encrypt8
-
- vld1.64 {@XMM[8]-@XMM[9]}, [r0,:128]!
- vld1.64 {@XMM[10]}, [r0,:128]!
- veor @XMM[0], @XMM[0], @XMM[ 8]
- veor @XMM[1], @XMM[1], @XMM[ 9]
- veor @XMM[8], @XMM[4], @XMM[10]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]!
- vst1.8 {@XMM[8]}, [$out]!
-
- vld1.64 {@XMM[8]}, [r0,:128] @ next round tweak
- b .Lxts_enc_done
-.align 4
-.Lxts_enc_2:
- vst1.64 {@XMM[10]}, [r0,:128] @ next round tweak
-
- veor @XMM[0], @XMM[0], @XMM[8]
-#ifndef BSAES_ASM_EXTENDED_KEY
- add r4, sp, #0x90 @ pass key schedule
-#else
- add r4, $key, #248 @ pass key schedule
-#endif
- veor @XMM[1], @XMM[1], @XMM[9]
- mov r5, $rounds @ pass rounds
- mov r0, sp
-
- bl _bsaes_encrypt8
-
- vld1.64 {@XMM[8]-@XMM[9]}, [r0,:128]!
- veor @XMM[0], @XMM[0], @XMM[ 8]
- veor @XMM[1], @XMM[1], @XMM[ 9]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]!
-
- vld1.64 {@XMM[8]}, [r0,:128] @ next round tweak
- b .Lxts_enc_done
-.align 4
-.Lxts_enc_1:
- mov r0, sp
- veor @XMM[0], @XMM[8]
- mov r1, sp
- vst1.8 {@XMM[0]}, [sp,:128]
- mov r2, $key
- mov r4, $fp @ preserve fp
-
- bl AES_encrypt
-
- vld1.8 {@XMM[0]}, [sp,:128]
- veor @XMM[0], @XMM[0], @XMM[8]
- vst1.8 {@XMM[0]}, [$out]!
- mov $fp, r4
-
- vmov @XMM[8], @XMM[9] @ next round tweak
-
-.Lxts_enc_done:
-#ifndef XTS_CHAIN_TWEAK
- adds $len, #0x10
- beq .Lxts_enc_ret
- sub r6, $out, #0x10
-
-.Lxts_enc_steal:
- ldrb r0, [$inp], #1
- ldrb r1, [$out, #-0x10]
- strb r0, [$out, #-0x10]
- strb r1, [$out], #1
-
- subs $len, #1
- bhi .Lxts_enc_steal
-
- vld1.8 {@XMM[0]}, [r6]
- mov r0, sp
- veor @XMM[0], @XMM[0], @XMM[8]
- mov r1, sp
- vst1.8 {@XMM[0]}, [sp,:128]
- mov r2, $key
- mov r4, $fp @ preserve fp
-
- bl AES_encrypt
-
- vld1.8 {@XMM[0]}, [sp,:128]
- veor @XMM[0], @XMM[0], @XMM[8]
- vst1.8 {@XMM[0]}, [r6]
- mov $fp, r4
-#endif
-
-.Lxts_enc_ret:
- bic r0, $fp, #0xf
- vmov.i32 q0, #0
- vmov.i32 q1, #0
-#ifdef XTS_CHAIN_TWEAK
- ldr r1, [$fp, #0x20+VFP_ABI_FRAME] @ chain tweak
-#endif
-.Lxts_enc_bzero: @ wipe key schedule [if any]
- vstmia sp!, {q0-q1}
- cmp sp, r0
- bne .Lxts_enc_bzero
-
- mov sp, $fp
-#ifdef XTS_CHAIN_TWEAK
- vst1.8 {@XMM[8]}, [r1]
-#endif
- VFP_ABI_POP
- ldmia sp!, {r4-r10, pc} @ return
-
-.size bsaes_xts_encrypt,.-bsaes_xts_encrypt
-
-.globl bsaes_xts_decrypt
-.type bsaes_xts_decrypt,%function
-.align 4
-bsaes_xts_decrypt:
- mov ip, sp
- stmdb sp!, {r4-r10, lr} @ 0x20
- VFP_ABI_PUSH
- mov r6, sp @ future $fp
-
- mov $inp, r0
- mov $out, r1
- mov $len, r2
- mov $key, r3
-
- sub r0, sp, #0x10 @ 0x10
- bic r0, #0xf @ align at 16 bytes
- mov sp, r0
-
-#ifdef XTS_CHAIN_TWEAK
- ldr r0, [ip] @ pointer to input tweak
-#else
- @ generate initial tweak
- ldr r0, [ip, #4] @ iv[]
- mov r1, sp
- ldr r2, [ip, #0] @ key2
- bl AES_encrypt
- mov r0, sp @ pointer to initial tweak
-#endif
-
- ldr $rounds, [$key, #240] @ get # of rounds
- mov $fp, r6
-#ifndef BSAES_ASM_EXTENDED_KEY
- @ allocate the key schedule on the stack
- sub r12, sp, $rounds, lsl#7 @ 128 bytes per inner round key
- @ add r12, #`128-32` @ size of bit-sliced key schedule
- sub r12, #`32+16` @ place for tweak[9]
-
- @ populate the key schedule
- mov r4, $key @ pass key
- mov r5, $rounds @ pass # of rounds
- mov sp, r12
- add r12, #0x90 @ pass key schedule
- bl _bsaes_key_convert
- add r4, sp, #0x90
- vldmia r4, {@XMM[6]}
- vstmia r12, {@XMM[15]} @ save last round key
- veor @XMM[7], @XMM[7], @XMM[6] @ fix up round 0 key
- vstmia r4, {@XMM[7]}
-#else
- ldr r12, [$key, #244]
- eors r12, #1
- beq 0f
-
- str r12, [$key, #244]
- mov r4, $key @ pass key
- mov r5, $rounds @ pass # of rounds
- add r12, $key, #248 @ pass key schedule
- bl _bsaes_key_convert
- add r4, $key, #248
- vldmia r4, {@XMM[6]}
- vstmia r12, {@XMM[15]} @ save last round key
- veor @XMM[7], @XMM[7], @XMM[6] @ fix up round 0 key
- vstmia r4, {@XMM[7]}
-
-.align 2
-0: sub sp, #0x90 @ place for tweak[9]
-#endif
- 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
- b .Lxts_dec_loop
-
-.align 4
-.Lxts_dec_loop:
- vldmia $magic, {$twmask} @ load XTS magic
- vshr.s64 @T[0], @XMM[8], #63
- mov r0, sp
- vand @T[0], @T[0], $twmask
-___
-for($i=9;$i<16;$i++) {
-$code.=<<___;
- vadd.u64 @XMM[$i], @XMM[$i-1], @XMM[$i-1]
- vst1.64 {@XMM[$i-1]}, [r0,:128]!
- vswp `&Dhi("@T[0]")`,`&Dlo("@T[0]")`
- vshr.s64 @T[1], @XMM[$i], #63
- veor @XMM[$i], @XMM[$i], @T[0]
- vand @T[1], @T[1], $twmask
-___
- @T=reverse(@T);
-
-$code.=<<___ if ($i>=10);
- vld1.8 {@XMM[$i-10]}, [$inp]!
-___
-$code.=<<___ if ($i>=11);
- veor @XMM[$i-11], @XMM[$i-11], @XMM[$i-3]
-___
-}
-$code.=<<___;
- vadd.u64 @XMM[8], @XMM[15], @XMM[15]
- vst1.64 {@XMM[15]}, [r0,:128]!
- vswp `&Dhi("@T[0]")`,`&Dlo("@T[0]")`
- veor @XMM[8], @XMM[8], @T[0]
- vst1.64 {@XMM[8]}, [r0,:128] @ next round tweak
-
- vld1.8 {@XMM[6]-@XMM[7]}, [$inp]!
- veor @XMM[5], @XMM[5], @XMM[13]
-#ifndef BSAES_ASM_EXTENDED_KEY
- add r4, sp, #0x90 @ pass key schedule
-#else
- add r4, $key, #248 @ pass key schedule
-#endif
- veor @XMM[6], @XMM[6], @XMM[14]
- mov r5, $rounds @ pass rounds
- veor @XMM[7], @XMM[7], @XMM[15]
- mov r0, sp
-
- bl _bsaes_decrypt8
-
- vld1.64 {@XMM[ 8]-@XMM[ 9]}, [r0,:128]!
- vld1.64 {@XMM[10]-@XMM[11]}, [r0,:128]!
- veor @XMM[0], @XMM[0], @XMM[ 8]
- vld1.64 {@XMM[12]-@XMM[13]}, [r0,:128]!
- veor @XMM[1], @XMM[1], @XMM[ 9]
- veor @XMM[8], @XMM[6], @XMM[10]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]!
- veor @XMM[9], @XMM[4], @XMM[11]
- vld1.64 {@XMM[14]-@XMM[15]}, [r0,:128]!
- veor @XMM[10], @XMM[2], @XMM[12]
- vst1.8 {@XMM[8]-@XMM[9]}, [$out]!
- veor @XMM[11], @XMM[7], @XMM[13]
- veor @XMM[12], @XMM[3], @XMM[14]
- vst1.8 {@XMM[10]-@XMM[11]}, [$out]!
- veor @XMM[13], @XMM[5], @XMM[15]
- vst1.8 {@XMM[12]-@XMM[13]}, [$out]!
-
- vld1.64 {@XMM[8]}, [r0,:128] @ next round tweak
-
- subs $len, #0x80
- bpl .Lxts_dec_loop
-
-.Lxts_dec_short:
- adds $len, #0x70
- bmi .Lxts_dec_done
-
- vldmia $magic, {$twmask} @ load XTS magic
- vshr.s64 @T[0], @XMM[8], #63
- mov r0, sp
- vand @T[0], @T[0], $twmask
-___
-for($i=9;$i<16;$i++) {
-$code.=<<___;
- vadd.u64 @XMM[$i], @XMM[$i-1], @XMM[$i-1]
- vst1.64 {@XMM[$i-1]}, [r0,:128]!
- vswp `&Dhi("@T[0]")`,`&Dlo("@T[0]")`
- vshr.s64 @T[1], @XMM[$i], #63
- veor @XMM[$i], @XMM[$i], @T[0]
- vand @T[1], @T[1], $twmask
-___
- @T=reverse(@T);
-
-$code.=<<___ if ($i>=10);
- vld1.8 {@XMM[$i-10]}, [$inp]!
- subs $len, #0x10
- bmi .Lxts_dec_`$i-9`
-___
-$code.=<<___ if ($i>=11);
- veor @XMM[$i-11], @XMM[$i-11], @XMM[$i-3]
-___
-}
-$code.=<<___;
- sub $len, #0x10
- vst1.64 {@XMM[15]}, [r0,:128] @ next round tweak
-
- vld1.8 {@XMM[6]}, [$inp]!
- veor @XMM[5], @XMM[5], @XMM[13]
-#ifndef BSAES_ASM_EXTENDED_KEY
- add r4, sp, #0x90 @ pass key schedule
-#else
- add r4, $key, #248 @ pass key schedule
-#endif
- veor @XMM[6], @XMM[6], @XMM[14]
- mov r5, $rounds @ pass rounds
- mov r0, sp
-
- bl _bsaes_decrypt8
-
- vld1.64 {@XMM[ 8]-@XMM[ 9]}, [r0,:128]!
- vld1.64 {@XMM[10]-@XMM[11]}, [r0,:128]!
- veor @XMM[0], @XMM[0], @XMM[ 8]
- vld1.64 {@XMM[12]-@XMM[13]}, [r0,:128]!
- veor @XMM[1], @XMM[1], @XMM[ 9]
- veor @XMM[8], @XMM[6], @XMM[10]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]!
- veor @XMM[9], @XMM[4], @XMM[11]
- vld1.64 {@XMM[14]}, [r0,:128]!
- veor @XMM[10], @XMM[2], @XMM[12]
- vst1.8 {@XMM[8]-@XMM[9]}, [$out]!
- veor @XMM[11], @XMM[7], @XMM[13]
- veor @XMM[12], @XMM[3], @XMM[14]
- vst1.8 {@XMM[10]-@XMM[11]}, [$out]!
- vst1.8 {@XMM[12]}, [$out]!
-
- vld1.64 {@XMM[8]}, [r0,:128] @ next round tweak
- b .Lxts_dec_done
-.align 4
-.Lxts_dec_6:
- vst1.64 {@XMM[14]}, [r0,:128] @ next round tweak
-
- veor @XMM[4], @XMM[4], @XMM[12]
-#ifndef BSAES_ASM_EXTENDED_KEY
- add r4, sp, #0x90 @ pass key schedule
-#else
- add r4, $key, #248 @ pass key schedule
-#endif
- veor @XMM[5], @XMM[5], @XMM[13]
- mov r5, $rounds @ pass rounds
- mov r0, sp
-
- bl _bsaes_decrypt8
-
- vld1.64 {@XMM[ 8]-@XMM[ 9]}, [r0,:128]!
- vld1.64 {@XMM[10]-@XMM[11]}, [r0,:128]!
- veor @XMM[0], @XMM[0], @XMM[ 8]
- vld1.64 {@XMM[12]-@XMM[13]}, [r0,:128]!
- veor @XMM[1], @XMM[1], @XMM[ 9]
- veor @XMM[8], @XMM[6], @XMM[10]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]!
- veor @XMM[9], @XMM[4], @XMM[11]
- veor @XMM[10], @XMM[2], @XMM[12]
- vst1.8 {@XMM[8]-@XMM[9]}, [$out]!
- veor @XMM[11], @XMM[7], @XMM[13]
- vst1.8 {@XMM[10]-@XMM[11]}, [$out]!
-
- vld1.64 {@XMM[8]}, [r0,:128] @ next round tweak
- b .Lxts_dec_done
-.align 4
-.Lxts_dec_5:
- vst1.64 {@XMM[13]}, [r0,:128] @ next round tweak
-
- veor @XMM[3], @XMM[3], @XMM[11]
-#ifndef BSAES_ASM_EXTENDED_KEY
- add r4, sp, #0x90 @ pass key schedule
-#else
- add r4, $key, #248 @ pass key schedule
-#endif
- veor @XMM[4], @XMM[4], @XMM[12]
- mov r5, $rounds @ pass rounds
- mov r0, sp
-
- bl _bsaes_decrypt8
-
- vld1.64 {@XMM[ 8]-@XMM[ 9]}, [r0,:128]!
- vld1.64 {@XMM[10]-@XMM[11]}, [r0,:128]!
- veor @XMM[0], @XMM[0], @XMM[ 8]
- vld1.64 {@XMM[12]}, [r0,:128]!
- veor @XMM[1], @XMM[1], @XMM[ 9]
- veor @XMM[8], @XMM[6], @XMM[10]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]!
- veor @XMM[9], @XMM[4], @XMM[11]
- veor @XMM[10], @XMM[2], @XMM[12]
- vst1.8 {@XMM[8]-@XMM[9]}, [$out]!
- vst1.8 {@XMM[10]}, [$out]!
-
- vld1.64 {@XMM[8]}, [r0,:128] @ next round tweak
- b .Lxts_dec_done
-.align 4
-.Lxts_dec_4:
- vst1.64 {@XMM[12]}, [r0,:128] @ next round tweak
-
- veor @XMM[2], @XMM[2], @XMM[10]
-#ifndef BSAES_ASM_EXTENDED_KEY
- add r4, sp, #0x90 @ pass key schedule
-#else
- add r4, $key, #248 @ pass key schedule
-#endif
- veor @XMM[3], @XMM[3], @XMM[11]
- mov r5, $rounds @ pass rounds
- mov r0, sp
-
- bl _bsaes_decrypt8
-
- vld1.64 {@XMM[ 8]-@XMM[ 9]}, [r0,:128]!
- vld1.64 {@XMM[10]-@XMM[11]}, [r0,:128]!
- veor @XMM[0], @XMM[0], @XMM[ 8]
- veor @XMM[1], @XMM[1], @XMM[ 9]
- veor @XMM[8], @XMM[6], @XMM[10]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]!
- veor @XMM[9], @XMM[4], @XMM[11]
- vst1.8 {@XMM[8]-@XMM[9]}, [$out]!
-
- vld1.64 {@XMM[8]}, [r0,:128] @ next round tweak
- b .Lxts_dec_done
-.align 4
-.Lxts_dec_3:
- vst1.64 {@XMM[11]}, [r0,:128] @ next round tweak
-
- veor @XMM[1], @XMM[1], @XMM[9]
-#ifndef BSAES_ASM_EXTENDED_KEY
- add r4, sp, #0x90 @ pass key schedule
-#else
- add r4, $key, #248 @ pass key schedule
-#endif
- veor @XMM[2], @XMM[2], @XMM[10]
- mov r5, $rounds @ pass rounds
- mov r0, sp
-
- bl _bsaes_decrypt8
-
- vld1.64 {@XMM[8]-@XMM[9]}, [r0,:128]!
- vld1.64 {@XMM[10]}, [r0,:128]!
- veor @XMM[0], @XMM[0], @XMM[ 8]
- veor @XMM[1], @XMM[1], @XMM[ 9]
- veor @XMM[8], @XMM[6], @XMM[10]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]!
- vst1.8 {@XMM[8]}, [$out]!
-
- vld1.64 {@XMM[8]}, [r0,:128] @ next round tweak
- b .Lxts_dec_done
-.align 4
-.Lxts_dec_2:
- vst1.64 {@XMM[10]}, [r0,:128] @ next round tweak
-
- veor @XMM[0], @XMM[0], @XMM[8]
-#ifndef BSAES_ASM_EXTENDED_KEY
- add r4, sp, #0x90 @ pass key schedule
-#else
- add r4, $key, #248 @ pass key schedule
-#endif
- veor @XMM[1], @XMM[1], @XMM[9]
- mov r5, $rounds @ pass rounds
- mov r0, sp
-
- bl _bsaes_decrypt8
-
- vld1.64 {@XMM[8]-@XMM[9]}, [r0,:128]!
- veor @XMM[0], @XMM[0], @XMM[ 8]
- veor @XMM[1], @XMM[1], @XMM[ 9]
- vst1.8 {@XMM[0]-@XMM[1]}, [$out]!
-
- vld1.64 {@XMM[8]}, [r0,:128] @ next round tweak
- b .Lxts_dec_done
-.align 4
-.Lxts_dec_1:
- mov r0, sp
- veor @XMM[0], @XMM[8]
- mov r1, sp
- vst1.8 {@XMM[0]}, [sp,:128]
- mov r2, $key
- mov r4, $fp @ preserve fp
- mov r5, $magic @ preserve magic
-
- bl AES_decrypt
-
- vld1.8 {@XMM[0]}, [sp,:128]
- veor @XMM[0], @XMM[0], @XMM[8]
- vst1.8 {@XMM[0]}, [$out]!
- mov $fp, r4
- mov $magic, r5
-
- vmov @XMM[8], @XMM[9] @ next round tweak
-
-.Lxts_dec_done:
-#ifndef XTS_CHAIN_TWEAK
- adds $len, #0x10
- beq .Lxts_dec_ret
-
- @ calculate one round of extra tweak for the stolen ciphertext
- vldmia $magic, {$twmask}
- vshr.s64 @XMM[6], @XMM[8], #63
- vand @XMM[6], @XMM[6], $twmask
- vadd.u64 @XMM[9], @XMM[8], @XMM[8]
- vswp `&Dhi("@XMM[6]")`,`&Dlo("@XMM[6]")`
- veor @XMM[9], @XMM[9], @XMM[6]
-
- @ perform the final decryption with the last tweak value
- vld1.8 {@XMM[0]}, [$inp]!
- mov r0, sp
- veor @XMM[0], @XMM[0], @XMM[9]
- mov r1, sp
- vst1.8 {@XMM[0]}, [sp,:128]
- mov r2, $key
- mov r4, $fp @ preserve fp
-
- bl AES_decrypt
-
- vld1.8 {@XMM[0]}, [sp,:128]
- veor @XMM[0], @XMM[0], @XMM[9]
- vst1.8 {@XMM[0]}, [$out]
-
- mov r6, $out
-.Lxts_dec_steal:
- ldrb r1, [$out]
- ldrb r0, [$inp], #1
- strb r1, [$out, #0x10]
- strb r0, [$out], #1
-
- subs $len, #1
- bhi .Lxts_dec_steal
-
- vld1.8 {@XMM[0]}, [r6]
- mov r0, sp
- veor @XMM[0], @XMM[8]
- mov r1, sp
- vst1.8 {@XMM[0]}, [sp,:128]
- mov r2, $key
-
- bl AES_decrypt
-
- vld1.8 {@XMM[0]}, [sp,:128]
- veor @XMM[0], @XMM[0], @XMM[8]
- vst1.8 {@XMM[0]}, [r6]
- mov $fp, r4
-#endif
-
-.Lxts_dec_ret:
- bic r0, $fp, #0xf
- vmov.i32 q0, #0
- vmov.i32 q1, #0
-#ifdef XTS_CHAIN_TWEAK
- ldr r1, [$fp, #0x20+VFP_ABI_FRAME] @ chain tweak
-#endif
-.Lxts_dec_bzero: @ wipe key schedule [if any]
- vstmia sp!, {q0-q1}
- cmp sp, r0
- bne .Lxts_dec_bzero
-
- mov sp, $fp
-#ifdef XTS_CHAIN_TWEAK
- vst1.8 {@XMM[8]}, [r1]
-#endif
- VFP_ABI_POP
- ldmia sp!, {r4-r10, pc} @ return
-
-.size bsaes_xts_decrypt,.-bsaes_xts_decrypt
-___
-}
-$code.=<<___;
-#endif
-___
-
-$code =~ s/\`([^\`]*)\`/eval($1)/gem;
-
-open SELF,$0;
-while(<SELF>) {
- next if (/^#!/);
- last if (!s/^#/@/ and !/^$/);
- print;
-}
-close SELF;
-
-print $code;
-
-close STDOUT;
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-18 05:14:33 +0000