| 1 | #! /usr/bin/env perl
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| 2 | # Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | #
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| 4 | # Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | # this file except in compliance with the License. You can obtain a copy
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| 6 | # in the file LICENSE in the source distribution or at
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| 7 | # https://www.openssl.org/source/license.html
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| 8 |
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| 9 |
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| 10 | # ====================================================================
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| 11 | # Written by Andy Polyakov <[email protected]> for the OpenSSL
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| 12 | # project. The module is, however, dual licensed under OpenSSL and
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| 13 | # CRYPTOGAMS licenses depending on where you obtain it. For further
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| 14 | # details see http://www.openssl.org/~appro/cryptogams/.
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| 15 | # ====================================================================
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| 16 |
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| 17 | # I let hardware handle unaligned input(*), except on page boundaries
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| 18 | # (see below for details). Otherwise straightforward implementation
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| 19 | # with X vector in register bank.
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| 20 | #
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| 21 | # (*) this means that this module is inappropriate for PPC403? Does
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| 22 | # anybody know if pre-POWER3 can sustain unaligned load?
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| 23 |
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| 24 | # -m64 -m32
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| 25 | # ----------------------------------
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| 26 | # PPC970,gcc-4.0.0 +76% +59%
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| 27 | # Power6,xlc-7 +68% +33%
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| 28 |
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| 29 | $flavour = shift;
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| 30 |
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| 31 | if ($flavour =~ /64/) {
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| 32 | $SIZE_T =8;
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| 33 | $LRSAVE =2*$SIZE_T;
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| 34 | $UCMP ="cmpld";
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| 35 | $STU ="stdu";
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| 36 | $POP ="ld";
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| 37 | $PUSH ="std";
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| 38 | } elsif ($flavour =~ /32/) {
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| 39 | $SIZE_T =4;
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| 40 | $LRSAVE =$SIZE_T;
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| 41 | $UCMP ="cmplw";
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| 42 | $STU ="stwu";
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| 43 | $POP ="lwz";
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| 44 | $PUSH ="stw";
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| 45 | } else { die "nonsense $flavour"; }
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| 46 |
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| 47 | # Define endianness based on flavour
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| 48 | # i.e.: linux64le
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| 49 | $LITTLE_ENDIAN = ($flavour=~/le$/) ? $SIZE_T : 0;
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| 50 |
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| 51 | $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
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| 52 | ( $xlate="${dir}ppc-xlate.pl" and -f $xlate ) or
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| 53 | ( $xlate="${dir}../../perlasm/ppc-xlate.pl" and -f $xlate) or
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| 54 | die "can't locate ppc-xlate.pl";
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| 55 |
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| 56 | open STDOUT,"| $^X $xlate $flavour ".shift || die "can't call $xlate: $!";
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| 57 |
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| 58 | $FRAME=24*$SIZE_T+64;
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| 59 | $LOCALS=6*$SIZE_T;
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| 60 |
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| 61 | $K ="r0";
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| 62 | $sp ="r1";
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| 63 | $toc="r2";
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| 64 | $ctx="r3";
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| 65 | $inp="r4";
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| 66 | $num="r5";
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| 67 | $t0 ="r15";
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| 68 | $t1 ="r6";
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| 69 |
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| 70 | $A ="r7";
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| 71 | $B ="r8";
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| 72 | $C ="r9";
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| 73 | $D ="r10";
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| 74 | $E ="r11";
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| 75 | $T ="r12";
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| 76 |
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| 77 | @V=($A,$B,$C,$D,$E,$T);
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| 78 | @X=("r16","r17","r18","r19","r20","r21","r22","r23",
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| 79 | "r24","r25","r26","r27","r28","r29","r30","r31");
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| 80 |
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| 81 | sub loadbe {
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| 82 | my ($dst, $src, $temp_reg) = @_;
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| 83 | $code.=<<___ if (!$LITTLE_ENDIAN);
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| 84 | lwz $dst,$src
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| 85 | ___
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| 86 | $code.=<<___ if ($LITTLE_ENDIAN);
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| 87 | lwz $temp_reg,$src
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| 88 | rotlwi $dst,$temp_reg,8
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| 89 | rlwimi $dst,$temp_reg,24,0,7
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| 90 | rlwimi $dst,$temp_reg,24,16,23
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| 91 | ___
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| 92 | }
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| 93 |
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| 94 | sub BODY_00_19 {
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| 95 | my ($i,$a,$b,$c,$d,$e,$f)=@_;
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| 96 | my $j=$i+1;
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| 97 |
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| 98 | # Since the last value of $f is discarded, we can use
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| 99 | # it as a temp reg to swap byte-order when needed.
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| 100 | loadbe("@X[$i]","`$i*4`($inp)",$f) if ($i==0);
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| 101 | loadbe("@X[$j]","`$j*4`($inp)",$f) if ($i<15);
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| 102 | $code.=<<___ if ($i<15);
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| 103 | add $f,$K,$e
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| 104 | rotlwi $e,$a,5
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| 105 | add $f,$f,@X[$i]
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| 106 | and $t0,$c,$b
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| 107 | add $f,$f,$e
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| 108 | andc $t1,$d,$b
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| 109 | rotlwi $b,$b,30
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| 110 | or $t0,$t0,$t1
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| 111 | add $f,$f,$t0
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| 112 | ___
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| 113 | $code.=<<___ if ($i>=15);
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| 114 | add $f,$K,$e
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| 115 | rotlwi $e,$a,5
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| 116 | xor @X[$j%16],@X[$j%16],@X[($j+2)%16]
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| 117 | add $f,$f,@X[$i%16]
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| 118 | and $t0,$c,$b
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| 119 | xor @X[$j%16],@X[$j%16],@X[($j+8)%16]
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| 120 | add $f,$f,$e
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| 121 | andc $t1,$d,$b
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| 122 | rotlwi $b,$b,30
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| 123 | or $t0,$t0,$t1
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| 124 | xor @X[$j%16],@X[$j%16],@X[($j+13)%16]
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| 125 | add $f,$f,$t0
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| 126 | rotlwi @X[$j%16],@X[$j%16],1
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| 127 | ___
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| 128 | }
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| 129 |
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| 130 | sub BODY_20_39 {
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| 131 | my ($i,$a,$b,$c,$d,$e,$f)=@_;
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| 132 | my $j=$i+1;
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| 133 | $code.=<<___ if ($i<79);
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| 134 | add $f,$K,$e
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| 135 | xor $t0,$b,$d
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| 136 | rotlwi $e,$a,5
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| 137 | xor @X[$j%16],@X[$j%16],@X[($j+2)%16]
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| 138 | add $f,$f,@X[$i%16]
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| 139 | xor $t0,$t0,$c
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| 140 | xor @X[$j%16],@X[$j%16],@X[($j+8)%16]
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| 141 | add $f,$f,$t0
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| 142 | rotlwi $b,$b,30
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| 143 | xor @X[$j%16],@X[$j%16],@X[($j+13)%16]
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| 144 | add $f,$f,$e
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| 145 | rotlwi @X[$j%16],@X[$j%16],1
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| 146 | ___
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| 147 | $code.=<<___ if ($i==79);
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| 148 | add $f,$K,$e
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| 149 | xor $t0,$b,$d
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| 150 | rotlwi $e,$a,5
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| 151 | lwz r16,0($ctx)
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| 152 | add $f,$f,@X[$i%16]
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| 153 | xor $t0,$t0,$c
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| 154 | lwz r17,4($ctx)
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| 155 | add $f,$f,$t0
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| 156 | rotlwi $b,$b,30
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| 157 | lwz r18,8($ctx)
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| 158 | lwz r19,12($ctx)
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| 159 | add $f,$f,$e
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| 160 | lwz r20,16($ctx)
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| 161 | ___
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| 162 | }
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| 163 |
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| 164 | sub BODY_40_59 {
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| 165 | my ($i,$a,$b,$c,$d,$e,$f)=@_;
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| 166 | my $j=$i+1;
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| 167 | $code.=<<___;
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| 168 | add $f,$K,$e
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| 169 | rotlwi $e,$a,5
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| 170 | xor @X[$j%16],@X[$j%16],@X[($j+2)%16]
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| 171 | add $f,$f,@X[$i%16]
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| 172 | and $t0,$b,$c
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| 173 | xor @X[$j%16],@X[$j%16],@X[($j+8)%16]
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| 174 | add $f,$f,$e
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| 175 | or $t1,$b,$c
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| 176 | rotlwi $b,$b,30
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| 177 | xor @X[$j%16],@X[$j%16],@X[($j+13)%16]
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| 178 | and $t1,$t1,$d
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| 179 | or $t0,$t0,$t1
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| 180 | rotlwi @X[$j%16],@X[$j%16],1
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| 181 | add $f,$f,$t0
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| 182 | ___
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| 183 | }
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| 184 |
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| 185 | $code=<<___;
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| 186 | .machine "any"
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| 187 | .text
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| 188 |
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| 189 | .globl .sha1_block_data_order
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| 190 | .align 4
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| 191 | .sha1_block_data_order:
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| 192 | $STU $sp,-$FRAME($sp)
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| 193 | mflr r0
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| 194 | $PUSH r15,`$FRAME-$SIZE_T*17`($sp)
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| 195 | $PUSH r16,`$FRAME-$SIZE_T*16`($sp)
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| 196 | $PUSH r17,`$FRAME-$SIZE_T*15`($sp)
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| 197 | $PUSH r18,`$FRAME-$SIZE_T*14`($sp)
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| 198 | $PUSH r19,`$FRAME-$SIZE_T*13`($sp)
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| 199 | $PUSH r20,`$FRAME-$SIZE_T*12`($sp)
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| 200 | $PUSH r21,`$FRAME-$SIZE_T*11`($sp)
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| 201 | $PUSH r22,`$FRAME-$SIZE_T*10`($sp)
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| 202 | $PUSH r23,`$FRAME-$SIZE_T*9`($sp)
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| 203 | $PUSH r24,`$FRAME-$SIZE_T*8`($sp)
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| 204 | $PUSH r25,`$FRAME-$SIZE_T*7`($sp)
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| 205 | $PUSH r26,`$FRAME-$SIZE_T*6`($sp)
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| 206 | $PUSH r27,`$FRAME-$SIZE_T*5`($sp)
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| 207 | $PUSH r28,`$FRAME-$SIZE_T*4`($sp)
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| 208 | $PUSH r29,`$FRAME-$SIZE_T*3`($sp)
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| 209 | $PUSH r30,`$FRAME-$SIZE_T*2`($sp)
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| 210 | $PUSH r31,`$FRAME-$SIZE_T*1`($sp)
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| 211 | $PUSH r0,`$FRAME+$LRSAVE`($sp)
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| 212 | lwz $A,0($ctx)
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| 213 | lwz $B,4($ctx)
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| 214 | lwz $C,8($ctx)
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| 215 | lwz $D,12($ctx)
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| 216 | lwz $E,16($ctx)
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| 217 | andi. r0,$inp,3
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| 218 | bne Lunaligned
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| 219 | Laligned:
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| 220 | mtctr $num
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| 221 | bl Lsha1_block_private
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| 222 | b Ldone
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| 223 |
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| 224 | ; PowerPC specification allows an implementation to be ill-behaved
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| 225 | ; upon unaligned access which crosses page boundary. "Better safe
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| 226 | ; than sorry" principle makes me treat it specially. But I don't
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| 227 | ; look for particular offending word, but rather for 64-byte input
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| 228 | ; block which crosses the boundary. Once found that block is aligned
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| 229 | ; and hashed separately...
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| 230 | .align 4
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| 231 | Lunaligned:
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| 232 | subfic $t1,$inp,4096
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| 233 | andi. $t1,$t1,4095 ; distance to closest page boundary
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| 234 | srwi. $t1,$t1,6 ; t1/=64
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| 235 | beq Lcross_page
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| 236 | $UCMP $num,$t1
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| 237 | ble Laligned ; didn't cross the page boundary
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| 238 | mtctr $t1
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| 239 | subfc $num,$t1,$num
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| 240 | bl Lsha1_block_private
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| 241 | Lcross_page:
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| 242 | li $t1,16
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| 243 | mtctr $t1
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| 244 | addi r20,$sp,$LOCALS ; spot within the frame
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| 245 | Lmemcpy:
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| 246 | lbz r16,0($inp)
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| 247 | lbz r17,1($inp)
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| 248 | lbz r18,2($inp)
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| 249 | lbz r19,3($inp)
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| 250 | addi $inp,$inp,4
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| 251 | stb r16,0(r20)
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| 252 | stb r17,1(r20)
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| 253 | stb r18,2(r20)
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| 254 | stb r19,3(r20)
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| 255 | addi r20,r20,4
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| 256 | bdnz Lmemcpy
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| 257 |
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| 258 | $PUSH $inp,`$FRAME-$SIZE_T*18`($sp)
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| 259 | li $t1,1
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| 260 | addi $inp,$sp,$LOCALS
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| 261 | mtctr $t1
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| 262 | bl Lsha1_block_private
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| 263 | $POP $inp,`$FRAME-$SIZE_T*18`($sp)
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| 264 | addic. $num,$num,-1
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| 265 | bne Lunaligned
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| 266 |
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| 267 | Ldone:
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| 268 | $POP r0,`$FRAME+$LRSAVE`($sp)
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| 269 | $POP r15,`$FRAME-$SIZE_T*17`($sp)
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| 270 | $POP r16,`$FRAME-$SIZE_T*16`($sp)
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| 271 | $POP r17,`$FRAME-$SIZE_T*15`($sp)
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| 272 | $POP r18,`$FRAME-$SIZE_T*14`($sp)
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| 273 | $POP r19,`$FRAME-$SIZE_T*13`($sp)
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| 274 | $POP r20,`$FRAME-$SIZE_T*12`($sp)
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| 275 | $POP r21,`$FRAME-$SIZE_T*11`($sp)
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| 276 | $POP r22,`$FRAME-$SIZE_T*10`($sp)
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| 277 | $POP r23,`$FRAME-$SIZE_T*9`($sp)
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| 278 | $POP r24,`$FRAME-$SIZE_T*8`($sp)
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| 279 | $POP r25,`$FRAME-$SIZE_T*7`($sp)
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| 280 | $POP r26,`$FRAME-$SIZE_T*6`($sp)
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| 281 | $POP r27,`$FRAME-$SIZE_T*5`($sp)
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| 282 | $POP r28,`$FRAME-$SIZE_T*4`($sp)
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| 283 | $POP r29,`$FRAME-$SIZE_T*3`($sp)
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| 284 | $POP r30,`$FRAME-$SIZE_T*2`($sp)
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| 285 | $POP r31,`$FRAME-$SIZE_T*1`($sp)
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| 286 | mtlr r0
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| 287 | addi $sp,$sp,$FRAME
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| 288 | blr
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| 289 | .long 0
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| 290 | .byte 0,12,4,1,0x80,18,3,0
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| 291 | .long 0
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| 292 | ___
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| 293 |
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| 294 | # This is private block function, which uses tailored calling
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| 295 | # interface, namely upon entry SHA_CTX is pre-loaded to given
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| 296 | # registers and counter register contains amount of chunks to
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| 297 | # digest...
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| 298 | $code.=<<___;
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| 299 | .align 4
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| 300 | Lsha1_block_private:
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| 301 | ___
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| 302 | $code.=<<___; # load K_00_19
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| 303 | lis $K,0x5a82
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| 304 | ori $K,$K,0x7999
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| 305 | ___
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| 306 | for($i=0;$i<20;$i++) { &BODY_00_19($i,@V); unshift(@V,pop(@V)); }
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| 307 | $code.=<<___; # load K_20_39
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| 308 | lis $K,0x6ed9
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| 309 | ori $K,$K,0xeba1
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| 310 | ___
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| 311 | for(;$i<40;$i++) { &BODY_20_39($i,@V); unshift(@V,pop(@V)); }
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| 312 | $code.=<<___; # load K_40_59
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| 313 | lis $K,0x8f1b
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| 314 | ori $K,$K,0xbcdc
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| 315 | ___
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| 316 | for(;$i<60;$i++) { &BODY_40_59($i,@V); unshift(@V,pop(@V)); }
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| 317 | $code.=<<___; # load K_60_79
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| 318 | lis $K,0xca62
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| 319 | ori $K,$K,0xc1d6
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| 320 | ___
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| 321 | for(;$i<80;$i++) { &BODY_20_39($i,@V); unshift(@V,pop(@V)); }
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| 322 | $code.=<<___;
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| 323 | add r16,r16,$E
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| 324 | add r17,r17,$T
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| 325 | add r18,r18,$A
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| 326 | add r19,r19,$B
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| 327 | add r20,r20,$C
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| 328 | stw r16,0($ctx)
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| 329 | mr $A,r16
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| 330 | stw r17,4($ctx)
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| 331 | mr $B,r17
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| 332 | stw r18,8($ctx)
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| 333 | mr $C,r18
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| 334 | stw r19,12($ctx)
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| 335 | mr $D,r19
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| 336 | stw r20,16($ctx)
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| 337 | mr $E,r20
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| 338 | addi $inp,$inp,`16*4`
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| 339 | bdnz Lsha1_block_private
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| 340 | blr
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| 341 | .long 0
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| 342 | .byte 0,12,0x14,0,0,0,0,0
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| 343 | .size .sha1_block_data_order,.-.sha1_block_data_order
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| 344 | ___
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| 345 | $code.=<<___;
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| 346 | .asciz "SHA1 block transform for PPC, CRYPTOGAMS by <appro\@fy.chalmers.se>"
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| 347 | ___
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| 348 |
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| 349 | $code =~ s/\`([^\`]*)\`/eval $1/gem;
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| 350 | print $code;
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| 351 | close STDOUT;
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