start work on NP stuff seriously

[spider.git] / perl / Verify.pm

diff --git a/perl/Verify.pm b/perl/Verify.pm
new file mode 100644 (file)
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--- /dev/null
+++ b/perl/Verify.pm
@@ -0,0 +1,61 @@
+#!/usr/bin/perl
+#
+# This module impliments the verification routines
+#
+# Copyright (c) 2002 Dirk Koopman G1TLH
+#
+# $Id$
+# 
+
+package Verify;
+
+use DXChannel;
+use DXUtil;
+use DXDebug;
+use Time::HiRes qw(gettimeofday);
+use Digest::SHA1 qw(sha1_base64);
+
+use strict;
+
+use vars qw($VERSION $BRANCH);
+$VERSION = sprintf( "%d.%03d", q$Revision$ =~ /(\d+)\.(\d+)/ );
+$BRANCH = sprintf( "%d.%03d", q$Revision$ =~ /\d+\.\d+\.(\d+)\.(\d+)/ ) || 0;
+$main::build += $VERSION;
+$main::branch += $BRANCH;
+
+sub new
+{
+       my $class = shift;
+       my $self = bless {}, ref($class) || $class; 
+       $self->{seed} = shift if @_;
+       return $self;
+}
+
+sub challenge
+{
+       my $self = shift;
+       my @t = gettimeofday();
+       my $r = unpack("xxNxx", pack("d", rand));
+       @t = map {$_ ^ $r} @t;
+       dbg("challenge r: $r seed: $t[0] $t[1]" ) if isdbg('verify');
+       $r = unpack("xxNxx", pack("d", rand));
+       @t = map {$_ ^ $r} @t;
+       dbg("challenge r: $r seed: $t[0] $t[1]" ) if isdbg('verify');
+       return $self->{seed} = sha1_base64(@t, gettimeofday, rand, rand, rand, @_);
+}
+
+sub response
+{
+       my $self = shift;
+       return sha1_base64($self->{seed}, @_);
+}
+
+sub verify
+{
+       my $self = shift;
+       my $answer = shift;
+       my $p = sha1_base64($self->{seed}, @_);
+       return $p eq $answer;
+}
+
+1;