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package Razor2::Client::Engine;
use strict;
use Digest::SHA1 qw(sha1_hex);
use Data::Dumper;
use Razor2::Signature::Ephemeral;
use Razor2::Engine::VR8;
use Razor2::Preproc::Manager;
use Razor2::String qw(hextobase64 makesis debugobj);
# meant to be inherited
#
sub new {
return {};
}
sub supported_engines {
my @a = qw( 4 8 );
my $hr = {};
foreach (@a) { $hr->{$_} = 1; }
return wantarray ? @a : $hr;
}
sub compute_engine {
my ($self, $engine, @params) = @_;
return $self->vr1_signature(@params) if $engine == 1;
return $self->vr2_signature(@params) if $engine == 2;
return $self->vr4_signature(@params) if $engine == 4;
return $self->vr8_signature(@params) if $engine == 8;
$self->log (1,"engine $engine not supported");
return;
}
#
# The following *_signature subroutines should be
# the same as the ones on the server
#
#
# VR1 Engine - Razor 1.0 SHA1 signatures
#
# fixme - how is this different from VR2 ?
#
sub vr1_signature {
my ($self, $text) = @_;
my $sig = hextobase64(sha1_hex($$text));
$self->log (11,"engine 1 computing on ". length($$text) .", sig=$sig");
return $sig;
}
#
# VR2 Engine - SHA1 signatures of decoded body content
#
sub vr2_signature {
my ($self, $text) = @_;
my $sha1 = sha1_hex($$text);
my $h2b = hextobase64($sha1);
$self->log (11,"engine 2 computing on ". length($$text) .", sig=$h2b");
return $h2b;
}
#
# VR4 Engine - Ephemereal signatures of decoded body content
#
sub vr4_signature {
my ($self, $text, $ep4) = @_;
my ($seed, $separator) = split /-/, $ep4, 2;
return $self->log(1,"vr4_signature: Bad ep4: $ep4") unless ($seed && $separator);
my $ehash = new Razor2::Signature::Ephemeral (seed => $seed, separator => $separator);
my $digest = $ehash->hexdigest($$text);
my $sig = hextobase64($digest);
$self->log (11,"engine 4 computing on ". length($$text) .", sig=$sig");
return $sig;
}
sub vr8_signature {
my ($self, $text) = @_;
my $vr8 = Razor2::Engine::VR8->new();
my $sigs = $vr8->signature($text);
return $sigs;
}
1;
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