#!/usr/bin/env perl # # ==================================================================== # Written by Andy Polyakov 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/. # ==================================================================== # June 2011 # # This is RC4+MD5 "stitch" implementation. The idea, as spelled in # http://download.intel.com/design/intarch/papers/323686.pdf, is that # since both algorithms exhibit instruction-level parallelism, ILP, # below theoretical maximum, interleaving them would allow to utilize # processor resources better and achieve better performance. RC4 # instruction sequence is virtually identical to rc4-x86_64.pl, which # is heavily based on submission by Maxim Perminov, Maxim Locktyukhin # and Jim Guilford of Intel. MD5 is fresh implementation aiming to # minimize register usage, which was used as "main thread" with RC4 # weaved into it, one RC4 round per one MD5 round. In addition to the # stiched subroutine the script can generate standalone replacement # md5_block_asm_data_order and RC4. Below are performance numbers in # cycles per processed byte, less is better, for these the standalone # subroutines, sum of them, and stitched one: # # RC4 MD5 RC4+MD5 stitch gain # Opteron 6.5(*) 5.4 11.9 7.0 +70%(*) # Core2 6.5 5.8 12.3 7.7 +60% # Westmere 4.3 5.2 9.5 7.0 +36% # Sandy Bridge 4.2 5.5 9.7 6.8 +43% # Ivy Bridge 4.1 5.2 9.3 6.0 +54% # Haswell 4.0 5.0 9.0 5.7 +60% # Skylake 6.3(**) 5.0 11.3 5.3 +110% # Atom 9.3 6.5 15.8 11.1 +42% # VIA Nano 6.3 5.4 11.7 8.6 +37% # Bulldozer 4.5 5.4 9.9 7.7 +29% # # (*) rc4-x86_64.pl delivers 5.3 on Opteron, so real improvement # is +53%... # (**) unidentified anomaly; my ($rc4,$md5)=(1,1); # what to generate? my $D="#" if (!$md5); # if set to "#", MD5 is stitched into RC4(), # but its result is discarded. Idea here is # to be able to use 'openssl speed rc4' for # benchmarking the stitched subroutine... my $flavour = shift; my $output = shift; if ($flavour =~ /\./) { $output = $flavour; undef $flavour; } my $win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/); $0 =~ m/(.*[\/\\])[^\/\\]+$/; my $dir=$1; my $xlate; ( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or ( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or die "can't locate x86_64-xlate.pl"; open OUT,"| \"$^X\" $xlate $flavour $output"; *STDOUT=*OUT; my ($dat,$in0,$out,$ctx,$inp,$len, $func,$nargs); if ($rc4 && !$md5) { ($dat,$len,$in0,$out) = ("%rdi","%rsi","%rdx","%rcx"); $func="RC4"; $nargs=4; } elsif ($md5 && !$rc4) { ($ctx,$inp,$len) = ("%rdi","%rsi","%rdx"); $func="md5_block_asm_data_order"; $nargs=3; } else { ($dat,$in0,$out,$ctx,$inp,$len) = ("%rdi","%rsi","%rdx","%rcx","%r8","%r9"); $func="rc4_md5_enc"; $nargs=6; # void rc4_md5_enc( # RC4_KEY *key, # # const void *in0, # RC4 input # void *out, # RC4 output # MD5_CTX *ctx, # # const void *inp, # MD5 input # size_t len); # number of 64-byte blocks } my @K=( 0xd76aa478,0xe8c7b756,0x242070db,0xc1bdceee, 0xf57c0faf,0x4787c62a,0xa8304613,0xfd469501, 0x698098d8,0x8b44f7af,0xffff5bb1,0x895cd7be, 0x6b901122,0xfd987193,0xa679438e,0x49b40821, 0xf61e2562,0xc040b340,0x265e5a51,0xe9b6c7aa, 0xd62f105d,0x02441453,0xd8a1e681,0xe7d3fbc8, 0x21e1cde6,0xc33707d6,0xf4d50d87,0x455a14ed, 0xa9e3e905,0xfcefa3f8,0x676f02d9,0x8d2a4c8a, 0xfffa3942,0x8771f681,0x6d9d6122,0xfde5380c, 0xa4beea44,0x4bdecfa9,0xf6bb4b60,0xbebfbc70, 0x289b7ec6,0xeaa127fa,0xd4ef3085,0x04881d05, 0xd9d4d039,0xe6db99e5,0x1fa27cf8,0xc4ac5665, 0xf4292244,0x432aff97,0xab9423a7,0xfc93a039, 0x655b59c3,0x8f0ccc92,0xffeff47d,0x85845dd1, 0x6fa87e4f,0xfe2ce6e0,0xa3014314,0x4e0811a1, 0xf7537e82,0xbd3af235,0x2ad7d2bb,0xeb86d391 ); my @V=("%r8d","%r9d","%r10d","%r11d"); # MD5 registers my $tmp="%r12d"; my @XX=("%rbp","%rsi"); # RC4 registers my @TX=("%rax","%rbx"); my $YY="%rcx"; my $TY="%rdx"; my $MOD=32; # 16, 32 or 64 $code.=<<___; .text .align 16 .globl $func .type $func,\@function,$nargs $func: cmp \$0,$len je .Labort push %rbx push %rbp push %r12 push %r13 push %r14 push %r15 sub \$40,%rsp .Lbody: ___ if ($rc4) { $code.=<<___; $D#md5# mov $ctx,%r11 # reassign arguments mov $len,%r12 mov $in0,%r13 mov $out,%r14 $D#md5# mov $inp,%r15 ___ $ctx="%r11" if ($md5); # reassign arguments $len="%r12"; $in0="%r13"; $out="%r14"; $inp="%r15" if ($md5); $inp=$in0 if (!$md5); $code.=<<___; xor $XX[0],$XX[0] xor $YY,$YY lea 8($dat),$dat mov -8($dat),$XX[0]#b mov -4($dat),$YY#b inc $XX[0]#b sub $in0,$out movl ($dat,$XX[0],4),$TX[0]#d ___ $code.=<<___ if (!$md5); xor $TX[1],$TX[1] test \$-128,$len jz .Loop1 sub $XX[0],$TX[1] and \$`$MOD-1`,$TX[1] jz .Loop${MOD}_is_hot sub $TX[1],$len .Loop${MOD}_warmup: add $TX[0]#b,$YY#b movl ($dat,$YY,4),$TY#d movl $TX[0]#d,($dat,$YY,4) movl $TY#d,($dat,$XX[0],4) add $TY#b,$TX[0]#b inc $XX[0]#b movl ($dat,$TX[0],4),$TY#d movl ($dat,$XX[0],4),$TX[0]#d xorb ($in0),$TY#b movb $TY#b,($out,$in0) lea 1($in0),$in0 dec $TX[1] jnz .Loop${MOD}_warmup mov $YY,$TX[1] xor $YY,$YY mov $TX[1]#b,$YY#b .Loop${MOD}_is_hot: mov $len,32(%rsp) # save original $len shr \$6,$len # number of 64-byte blocks ___ if ($D && !$md5) { # stitch in dummy MD5 $md5=1; $ctx="%r11"; $inp="%r15"; $code.=<<___; mov %rsp,$ctx mov $in0,$inp ___ } } $code.=<<___; #rc4# add $TX[0]#b,$YY#b #rc4# lea ($dat,$XX[0],4),$XX[1] shl \$6,$len add $inp,$len # pointer to the end of input mov $len,16(%rsp) #md5# mov $ctx,24(%rsp) # save pointer to MD5_CTX #md5# mov 0*4($ctx),$V[0] # load current hash value from MD5_CTX #md5# mov 1*4($ctx),$V[1] #md5# mov 2*4($ctx),$V[2] #md5# mov 3*4($ctx),$V[3] jmp .Loop .align 16 .Loop: #md5# mov $V[0],0*4(%rsp) # put aside current hash value #md5# mov $V[1],1*4(%rsp) #md5# mov $V[2],2*4(%rsp) #md5# mov $V[3],$tmp # forward reference #md5# mov $V[3],3*4(%rsp) ___ sub R0 { my ($i,$a,$b,$c,$d)=@_; my @rot0=(7,12,17,22); my $j=$i%16; my $k=$i%$MOD; my $xmm="%xmm".($j&1); $code.=" movdqu ($in0),%xmm2\n" if ($rc4 && $j==15); $code.=" add \$$MOD,$XX[0]#b\n" if ($rc4 && $j==15 && $k==$MOD-1); $code.=" pxor $xmm,$xmm\n" if ($rc4 && $j<=1); $code.=<<___; #rc4# movl ($dat,$YY,4),$TY#d #md5# xor $c,$tmp #rc4# movl $TX[0]#d,($dat,$YY,4) #md5# and $b,$tmp #md5# add 4*`$j`($inp),$a #rc4# add $TY#b,$TX[0]#b #rc4# movl `4*(($k+1)%$MOD)`(`$k==$MOD-1?"$dat,$XX[0],4":"$XX[1]"`),$TX[1]#d #md5# add \$$K[$i],$a #md5# xor $d,$tmp #rc4# movz $TX[0]#b,$TX[0]#d #rc4# movl $TY#d,4*$k($XX[1]) #md5# add $tmp,$a #rc4# add $TX[1]#b,$YY#b #md5# rol \$$rot0[$j%4],$a #md5# mov `$j==15?"$b":"$c"`,$tmp # forward reference #rc4# pinsrw \$`($j>>1)&7`,($dat,$TX[0],4),$xmm\n #md5# add $b,$a ___ $code.=<<___ if ($rc4 && $j==15 && $k==$MOD-1); mov $YY,$XX[1] xor $YY,$YY # keyword to partial register mov $XX[1]#b,$YY#b lea ($dat,$XX[0],4),$XX[1] ___ $code.=<<___ if ($rc4 && $j==15); psllq \$8,%xmm1 pxor %xmm0,%xmm2 pxor %xmm1,%xmm2 ___ } sub R1 { my ($i,$a,$b,$c,$d)=@_; my @rot1=(5,9,14,20); my $j=$i%16; my $k=$i%$MOD; my $xmm="%xmm".($j&1); $code.=" movdqu 16($in0),%xmm3\n" if ($rc4 && $j==15); $code.=" add \$$MOD,$XX[0]#b\n" if ($rc4 && $j==15 && $k==$MOD-1); $code.=" pxor $xmm,$xmm\n" if ($rc4 && $j<=1); $code.=<<___; #rc4# movl ($dat,$YY,4),$TY#d #md5# xor $b,$tmp #rc4# movl $TX[0]#d,($dat,$YY,4) #md5# and $d,$tmp #md5# add 4*`((1+5*$j)%16)`($inp),$a #rc4# add $TY#b,$TX[0]#b #rc4# movl `4*(($k+1)%$MOD)`(`$k==$MOD-1?"$dat,$XX[0],4":"$XX[1]"`),$TX[1]#d #md5# add \$$K[$i],$a #md5# xor $c,$tmp #rc4# movz $TX[0]#b,$TX[0]#d #rc4# movl $TY#d,4*$k($XX[1]) #md5# add $tmp,$a #rc4# add $TX[1]#b,$YY#b #md5# rol \$$rot1[$j%4],$a #md5# mov `$j==15?"$c":"$b"`,$tmp # forward reference #rc4# pinsrw \$`($j>>1)&7`,($dat,$TX[0],4),$xmm\n #md5# add $b,$a ___ $code.=<<___ if ($rc4 && $j==15 && $k==$MOD-1); mov $YY,$XX[1] xor $YY,$YY # keyword to partial register mov $XX[1]#b,$YY#b lea ($dat,$XX[0],4),$XX[1] ___ $code.=<<___ if ($rc4 && $j==15); psllq \$8,%xmm1 pxor %xmm0,%xmm3 pxor %xmm1,%xmm3 ___ } sub R2 { my ($i,$a,$b,$c,$d)=@_; my @rot2=(4,11,16,23); my $j=$i%16; my $k=$i%$MOD; my $xmm="%xmm".($j&1); $code.=" movdqu 32($in0),%xmm4\n" if ($rc4 && $j==15); $code.=" add \$$MOD,$XX[0]#b\n" if ($rc4 && $j==15 && $k==$MOD-1); $code.=" pxor $xmm,$xmm\n" if ($rc4 && $j<=1); $code.=<<___; #rc4# movl ($dat,$YY,4),$TY#d #md5# xor $c,$tmp #rc4# movl $TX[0]#d,($dat,$YY,4) #md5# xor $b,$tmp #md5# add 4*`((5+3*$j)%16)`($inp),$a #rc4# add $TY#b,$TX[0]#b #rc4# movl `4*(($k+1)%$MOD)`(`$k==$MOD-1?"$dat,$XX[0],4":"$XX[1]"`),$TX[1]#d #md5# add \$$K[$i],$a #rc4# movz $TX[0]#b,$TX[0]#d #md5# add $tmp,$a #rc4# movl $TY#d,4*$k($XX[1]) #rc4# add $TX[1]#b,$YY#b #md5# rol \$$rot2[$j%4],$a #md5# mov `$j==15?"\\\$-1":"$c"`,$tmp # forward reference #rc4# pinsrw \$`($j>>1)&7`,($dat,$TX[0],4),$xmm\n #md5# add $b,$a ___ $code.=<<___ if ($rc4 && $j==15 && $k==$MOD-1); mov $YY,$XX[1] xor $YY,$YY # keyword to partial register mov $XX[1]#b,$YY#b lea ($dat,$XX[0],4),$XX[1] ___ $code.=<<___ if ($rc4 && $j==15); psllq \$8,%xmm1 pxor %xmm0,%xmm4 pxor %xmm1,%xmm4 ___ } sub R3 { my ($i,$a,$b,$c,$d)=@_; my @rot3=(6,10,15,21); my $j=$i%16; my $k=$i%$MOD; my $xmm="%xmm".($j&1); $code.=" movdqu 48($in0),%xmm5\n" if ($rc4 && $j==15); $code.=" add \$$MOD,$XX[0]#b\n" if ($rc4 && $j==15 && $k==$MOD-1); $code.=" pxor $xmm,$xmm\n" if ($rc4 && $j<=1); $code.=<<___; #rc4# movl ($dat,$YY,4),$TY#d #md5# xor $d,$tmp #rc4# movl $TX[0]#d,($dat,$YY,4) #md5# or $b,$tmp #md5# add 4*`((7*$j)%16)`($inp),$a #rc4# add $TY#b,$TX[0]#b #rc4# movl `4*(($k+1)%$MOD)`(`$k==$MOD-1?"$dat,$XX[0],4":"$XX[1]"`),$TX[1]#d #md5# add \$$K[$i],$a #rc4# movz $TX[0]#b,$TX[0]#d #md5# xor $c,$tmp #rc4# movl $TY#d,4*$k($XX[1]) #md5# add $tmp,$a #rc4# add $TX[1]#b,$YY#b #md5# rol \$$rot3[$j%4],$a #md5# mov \$-1,$tmp # forward reference #rc4# pinsrw \$`($j>>1)&7`,($dat,$TX[0],4),$xmm\n #md5# add $b,$a ___ $code.=<<___ if ($rc4 && $j==15); mov $XX[0],$XX[1] xor $XX[0],$XX[0] # keyword to partial register mov $XX[1]#b,$XX[0]#b mov $YY,$XX[1] xor $YY,$YY # keyword to partial register mov $XX[1]#b,$YY#b lea ($dat,$XX[0],4),$XX[1] psllq \$8,%xmm1 pxor %xmm0,%xmm5 pxor %xmm1,%xmm5 ___ } my $i=0; for(;$i<16;$i++) { R0($i,@V); unshift(@V,pop(@V)); push(@TX,shift(@TX)); } for(;$i<32;$i++) { R1($i,@V); unshift(@V,pop(@V)); push(@TX,shift(@TX)); } for(;$i<48;$i++) { R2($i,@V); unshift(@V,pop(@V)); push(@TX,shift(@TX)); } for(;$i<64;$i++) { R3($i,@V); unshift(@V,pop(@V)); push(@TX,shift(@TX)); } $code.=<<___; #md5# add 0*4(%rsp),$V[0] # accumulate hash value #md5# add 1*4(%rsp),$V[1] #md5# add 2*4(%rsp),$V[2] #md5# add 3*4(%rsp),$V[3] #rc4# movdqu %xmm2,($out,$in0) # write RC4 output #rc4# movdqu %xmm3,16($out,$in0) #rc4# movdqu %xmm4,32($out,$in0) #rc4# movdqu %xmm5,48($out,$in0) #md5# lea 64($inp),$inp #rc4# lea 64($in0),$in0 cmp 16(%rsp),$inp # are we done? jb .Loop #md5# mov 24(%rsp),$len # restore pointer to MD5_CTX #rc4# sub $TX[0]#b,$YY#b # correct $YY #md5# mov $V[0],0*4($len) # write MD5_CTX #md5# mov $V[1],1*4($len) #md5# mov $V[2],2*4($len) #md5# mov $V[3],3*4($len) ___ $code.=<<___ if ($rc4 && (!$md5 || $D)); mov 32(%rsp),$len # restore original $len and \$63,$len # remaining bytes jnz .Loop1 jmp .Ldone .align 16 .Loop1: add $TX[0]#b,$YY#b movl ($dat,$YY,4),$TY#d movl $TX[0]#d,($dat,$YY,4) movl $TY#d,($dat,$XX[0],4) add $TY#b,$TX[0]#b inc $XX[0]#b movl ($dat,$TX[0],4),$TY#d movl ($dat,$XX[0],4),$TX[0]#d xorb ($in0),$TY#b movb $TY#b,($out,$in0) lea 1($in0),$in0 dec $len jnz .Loop1 .Ldone: ___ $code.=<<___; #rc4# sub \$1,$XX[0]#b #rc4# movl $XX[0]#d,-8($dat) #rc4# movl $YY#d,-4($dat) mov 40(%rsp),%r15 mov 48(%rsp),%r14 mov 56(%rsp),%r13 mov 64(%rsp),%r12 mov 72(%rsp),%rbp mov 80(%rsp),%rbx lea 88(%rsp),%rsp .Lepilogue: .Labort: ret .size $func,.-$func ___ if ($rc4 && $D) { # sole purpose of this section is to provide # option to use the generated module as drop-in # replacement for rc4-x86_64.pl for debugging # and testing purposes... my ($idx,$ido)=("%r8","%r9"); my ($dat,$len,$inp)=("%rdi","%rsi","%rdx"); $code.=<<___; .globl RC4_set_key .type RC4_set_key,\@function,3 .align 16 RC4_set_key: lea 8($dat),$dat lea ($inp,$len),$inp neg $len mov $len,%rcx xor %eax,%eax xor $ido,$ido xor %r10,%r10 xor %r11,%r11 jmp .Lw1stloop .align 16 .Lw1stloop: mov %eax,($dat,%rax,4) add \$1,%al jnc .Lw1stloop xor $ido,$ido xor $idx,$idx .align 16 .Lw2ndloop: mov ($dat,$ido,4),%r10d add ($inp,$len,1),$idx#b add %r10b,$idx#b add \$1,$len mov ($dat,$idx,4),%r11d cmovz %rcx,$len mov %r10d,($dat,$idx,4) mov %r11d,($dat,$ido,4) add \$1,$ido#b jnc .Lw2ndloop xor %eax,%eax mov %eax,-8($dat) mov %eax,-4($dat) ret .size RC4_set_key,.-RC4_set_key .globl RC4_options .type RC4_options,\@abi-omnipotent .align 16 RC4_options: lea .Lopts(%rip),%rax ret .align 64 .Lopts: .asciz "rc4(64x,int)" .align 64 .size RC4_options,.-RC4_options ___ } # EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame, # CONTEXT *context,DISPATCHER_CONTEXT *disp) if ($win64) { my $rec="%rcx"; my $frame="%rdx"; my $context="%r8"; my $disp="%r9"; $code.=<<___; .extern __imp_RtlVirtualUnwind .type se_handler,\@abi-omnipotent .align 16 se_handler: push %rsi push %rdi push %rbx push %rbp push %r12 push %r13 push %r14 push %r15 pushfq sub \$64,%rsp mov 120($context),%rax # pull context->Rax mov 248($context),%rbx # pull context->Rip lea .Lbody(%rip),%r10 cmp %r10,%rbx # context->Rip<.Lbody jb .Lin_prologue mov 152($context),%rax # pull context->Rsp lea .Lepilogue(%rip),%r10 cmp %r10,%rbx # context->Rip>=.Lepilogue jae .Lin_prologue mov 40(%rax),%r15 mov 48(%rax),%r14 mov 56(%rax),%r13 mov 64(%rax),%r12 mov 72(%rax),%rbp mov 80(%rax),%rbx lea 88(%rax),%rax mov %rbx,144($context) # restore context->Rbx mov %rbp,160($context) # restore context->Rbp mov %r12,216($context) # restore context->R12 mov %r13,224($context) # restore context->R12 mov %r14,232($context) # restore context->R14 mov %r15,240($context) # restore context->R15 .Lin_prologue: mov 8(%rax),%rdi mov 16(%rax),%rsi mov %rax,152($context) # restore context->Rsp mov %rsi,168($context) # restore context->Rsi mov %rdi,176($context) # restore context->Rdi mov 40($disp),%rdi # disp->ContextRecord mov $context,%rsi # context mov \$154,%ecx # sizeof(CONTEXT) .long 0xa548f3fc # cld; rep movsq mov $disp,%rsi xor %rcx,%rcx # arg1, UNW_FLAG_NHANDLER mov 8(%rsi),%rdx # arg2, disp->ImageBase mov 0(%rsi),%r8 # arg3, disp->ControlPc mov 16(%rsi),%r9 # arg4, disp->FunctionEntry mov 40(%rsi),%r10 # disp->ContextRecord lea 56(%rsi),%r11 # &disp->HandlerData lea 24(%rsi),%r12 # &disp->EstablisherFrame mov %r10,32(%rsp) # arg5 mov %r11,40(%rsp) # arg6 mov %r12,48(%rsp) # arg7 mov %rcx,56(%rsp) # arg8, (NULL) call *__imp_RtlVirtualUnwind(%rip) mov \$1,%eax # ExceptionContinueSearch add \$64,%rsp popfq pop %r15 pop %r14 pop %r13 pop %r12 pop %rbp pop %rbx pop %rdi pop %rsi ret .size se_handler,.-se_handler .section .pdata .align 4 .rva .LSEH_begin_$func .rva .LSEH_end_$func .rva .LSEH_info_$func .section .xdata .align 8 .LSEH_info_$func: .byte 9,0,0,0 .rva se_handler ___ } sub reg_part { my ($reg,$conv)=@_; if ($reg =~ /%r[0-9]+/) { $reg .= $conv; } elsif ($conv eq "b") { $reg =~ s/%[er]([^x]+)x?/%$1l/; } elsif ($conv eq "w") { $reg =~ s/%[er](.+)/%$1/; } elsif ($conv eq "d") { $reg =~ s/%[er](.+)/%e$1/; } return $reg; } $code =~ s/(%[a-z0-9]+)#([bwd])/reg_part($1,$2)/gem; $code =~ s/\`([^\`]*)\`/eval $1/gem; $code =~ s/pinsrw\s+\$0,/movd /gm; $code =~ s/#md5#//gm if ($md5); $code =~ s/#rc4#//gm if ($rc4); print $code; close STDOUT;