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#!/usr/bin/env perl
#
# Copyright (c) 2011 The OpenSSL Project.
#
######################################################################
#
# SHA1 and HMAC in Perl by <appro@openssl.org>.
#
{ package SHA1;
use integer;
{
################################### SHA1 block code generator
my @V = ('$A','$B','$C','$D','$E');
my $i;
sub XUpdate {
my $ret;
$ret="(\$T=\$W[($i-16)%16]^\$W[($i-14)%16]^\$W[($i-8)%16]^\$W[($i-3)%16],\n\t";
if ((1<<31)<<1) {
$ret.=" \$W[$i%16]=((\$T<<1)|(\$T>>31))&0xffffffff)\n\t ";
} else {
$ret.=" \$W[$i%16]=(\$T<<1)|((\$T>>31)&1))\n\t ";
}
}
sub tail {
my ($a,$b,$c,$d,$e)=@V;
my $ret;
if ((1<<31)<<1) {
$ret.="(($a<<5)|($a>>27));\n\t";
$ret.="$b=($b<<30)|($b>>2); $e&=0xffffffff; #$b&=0xffffffff;\n\t";
} else {
$ret.="(($a<<5)|($a>>27)&0x1f);\n\t";
$ret.="$b=($b<<30)|($b>>2)&0x3fffffff;\n\t";
}
$ret;
}
sub BODY_00_15 {
my ($a,$b,$c,$d,$e)=@V;
"$e+=\$W[$i]+0x5a827999+((($c^$d)&$b)^$d)+".tail();
}
sub BODY_16_19 {
my ($a,$b,$c,$d,$e)=@V;
"$e+=".XUpdate()."+0x5a827999+((($c^$d)&$b)^$d)+".tail();
}
sub BODY_20_39 {
my ($a,$b,$c,$d,$e)=@V;
"$e+=".XUpdate()."+0x6ed9eba1+($b^$c^$d)+".tail();
}
sub BODY_40_59 {
my ($a,$b,$c,$d,$e)=@V;
"$e+=".XUpdate()."+0x8f1bbcdc+(($b&$c)|(($b|$c)&$d))+".tail();
}
sub BODY_60_79 {
my ($a,$b,$c,$d,$e)=@V;
"$e+=".XUpdate()."+0xca62c1d6+($b^$c^$d)+".tail();
}
my $sha1_impl =
'sub block {
my $self = @_[0];
my @W = unpack("N16",@_[1]);
my ($A,$B,$C,$D,$E,$T) = @{$self->{H}};
';
$sha1_impl.='
$A &= 0xffffffff;
$B &= 0xffffffff;
' if ((1<<31)<<1);
for($i=0;$i<16;$i++){ $sha1_impl.=BODY_00_15(); unshift(@V,pop(@V)); }
for(;$i<20;$i++) { $sha1_impl.=BODY_16_19(); unshift(@V,pop(@V)); }
for(;$i<40;$i++) { $sha1_impl.=BODY_20_39(); unshift(@V,pop(@V)); }
for(;$i<60;$i++) { $sha1_impl.=BODY_40_59(); unshift(@V,pop(@V)); }
for(;$i<80;$i++) { $sha1_impl.=BODY_60_79(); unshift(@V,pop(@V)); }
$sha1_impl.='
$self->{H}[0]+=$A; $self->{H}[1]+=$B; $self->{H}[2]+=$C;
$self->{H}[3]+=$D; $self->{H}[4]+=$E; }';
#print $sha1_impl,"\n";
eval($sha1_impl); # generate code
}
sub Init {
my $class = shift; # multiple instances...
my $self = {};
bless $self,$class;
$self->{H} = [0x67452301,0xefcdab89,0x98badcfe,0x10325476,0xc3d2e1f0];
$self->{N} = 0;
return $self;
}
sub Update {
my $self = shift;
my $msg;
foreach $msg (@_) {
my $len = length($msg);
my $num = length($self->{buf});
my $off = 0;
$self->{N} += $len;
if (($num+$len)<64)
{ $self->{buf} .= $msg; next; }
elsif ($num)
{ $self->{buf} .= substr($msg,0,($off=64-$num));
$self->block($self->{buf});
}
while(($off+64) <= $len)
{ $self->block(substr($msg,$off,64));
$off += 64;
}
$self->{buf} = substr($msg,$off);
}
return $self;
}
sub Final {
my $self = shift;
my $num = length($self->{buf});
$self->{buf} .= chr(0x80); $num++;
if ($num>56)
{ $self->{buf} .= chr(0)x(64-$num);
$self->block($self->{buf});
$self->{buf}=undef;
$num=0;
}
$self->{buf} .= chr(0)x(56-$num);
$self->{buf} .= pack("N2",($self->{N}>>29)&0x7,$self->{N}<<3);
$self->block($self->{buf});
return pack("N*",@{$self->{H}});
}
sub Selftest {
my $hash;
$hash=SHA1->Init()->Update('abc')->Final();
die "SHA1 test#1" if (unpack("H*",$hash) ne 'a9993e364706816aba3e25717850c26c9cd0d89d');
$hash=SHA1->Init()->Update('abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq')->Final();
die "SHA1 test#2" if (unpack("H*",$hash) ne '84983e441c3bd26ebaae4aa1f95129e5e54670f1');
#$hash=SHA1->Init()->Update('a'x1000000)->Final();
#die "SHA1 test#3" if (unpack("H*",$hash) ne '34aa973cd4c4daa4f61eeb2bdbad27316534016f');
}
}
{ package HMAC;
sub Init {
my $class = shift;
my $key = shift;
my $self = {};
bless $self,$class;
if (length($key)>64) {
$key = SHA1->Init()->Update($key)->Final();
}
$key .= chr(0x00)x(64-length($key));
my @ikey = map($_^=0x36,unpack("C*",$key));
($self->{hash} = SHA1->Init())->Update(pack("C*",@ikey));
$self->{okey} = pack("C*",map($_^=0x36^0x5c,@ikey));
return $self;
}
sub Update {
my $self = shift;
$self->{hash}->Update(@_);
return $self;
}
sub Final {
my $self = shift;
my $ihash = $self->{hash}->Final();
return SHA1->Init()->Update($self->{okey},$ihash)->Final();
}
sub Selftest {
my $hmac;
$hmac = HMAC->Init('0123456789:;<=>?@ABC')->Update('Sample #2')->Final();
die "HMAC test" if (unpack("H*",$hmac) ne '0922d3405faa3d194f82a45830737d5cc6c75d24');
}
}
1;
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