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12-dsa.t
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#!/usr/bin/perl
# $Id: 12-dsa.t 3032 2008-09-05 00:39:59Z bchoate $
use strict;
use warnings;
use lib 't/lib';
use lib 'lib';
use lib 'extlib';
use Test::More tests => 8;
use MT;
use MT::Test;
use MT::Builder;
use MT::Util qw(dsa_verify perl_sha1_digest_hex dec2bin);
use lib 't';
my $msg = 'nina@blues.org::Nina Simone::1072216494';
my $sig = {
r => "527791435593304577725339030118988880225606145248",
s => "856186764515774026930421996711007369328400857333",
};
my $dsa_key = {
p => '11671236708387678327224206536086899180337891539414163231548040398520841845883184000627860280911468857014406210406182985401875818712804278750455023001090753',
g => '8390523802553664927497849579280285206671739131891639945934584937465879937204060160958306281843225586442674344146773393578506632957361175802992793531760152',
q => '1096416736263180470838402356096058638299098593011',
pub_key => '10172504425160158571454141863297493878195176114077274329624884017831109225358009830193460871698707783589128269392033962133593624636454152482919340057145639'
};
is(perl_sha1_digest_hex("abc"),
'a9993e364706816aba3e25717850c26c9cd0d89d',
'perl_sha1_digest_hex(abc)'
);
is(perl_sha1_digest_hex('abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq'),
'84983e441c3bd26ebaae4aa1f95129e5e54670f1',
'perl_sha1_digest_hex(abcd...)'
);
is(perl_sha1_digest_hex("This is a ::long string:\"\nincluding some f^nk3 ch\rcts\]\n"),
'a691f6e0777123f70fb8613b0cbd98c0d62dce6b',
'perl_sha1_digest_hex(This is a ::long string...}'
);
is(perl_sha1_digest_hex(''),
'da39a3ee5e6b4b0d3255bfef95601890afd80709',
'perl_sha1_digest_hex()'
);
ok(dsa_verify(Message => $msg, Signature => $sig, Key => $dsa_key),
'dsa_verify()'
);
if ($@) {
skip(1, "ERROR: $@");
} else {
ok(dsa_verify(
Message => $msg,
Signature => bless($sig, 'Crypt::DSA::Signature'),
Key => bless($dsa_key, 'Crypt::DSA::Key')
),
'blessed dsa_verify()'
);
}
$dsa_key->{g} = 1;
ok(!dsa_verify(
Message => $msg,
Signature => bless($sig,'Crypt::DSA::Signature'),
Key => bless($dsa_key, 'Crypt::DSA::Key')
),
'not(dsa_verify)'
);
# my $dsa_key = bless( {
# 'p' => '11671236708387678327224206536086899180337891539414163231548040398520841845883184000627860280911468857014406210406182985401875818712804278750455023001090753',
# 'g' => '8390523802553664927497849579280285206671739131891639945934584937465879937204060160958306281843225586442674344146773393578506632957361175802992793531760152',
# 'q' => '1096416736263180470838402356096058638299098593011',
# 'pub_key' => '10172504425160158571454141863297493878195176114077274329624884017831109225358009830193460871698707783589128269392033962133593624636454152482919340057145639'
# }, 'Crypt::DSA::Key' );
# print dsa_verify(Message => 'nina@blues.org::Nina Simone::1072137320',
# Key => $dsa_key,
# Signature => new Crypt::DSA::Signature(
# r => "179524654873292192810669641349818294463683984472",
# s => "32636895355904099107265678275162258563954033951"))
# ? "verified\n" : "incorrect\n";
# use Math::Pari qw( PARI );
# use Crypt::DSA::Util qw( bitsize bin2mp mod_inverse mod_exp );
# sub verify {
# my %param = @_;
# my($key, $dgst, $sig);
# #croak __PACKAGE__, "->verify: Need a Key" unless
# $key = $param{Key};
# unless ($dgst = $param{Digest}) {
# # croak __PACKAGE__, "->verify: Need either Message or Digest"
# # unless $param{Message};
# $dgst = sha1($param{Message});
# }
# #croak __PACKAGE__, "->verify: Need a Signature"
# # unless
# $sig = $param{Signature};
# my $u2 = mod_inverse($sig->s, $key->q);
# #print "u2 = $u2\n";
# my $u1 = bin2mp($dgst);
# $u1 = ($u1 * $u2) % $key->q;
# $u2 = ($sig->r * $u2) % $key->q;
# my $t1 = mod_exp($key->g, $u1, $key->p);
# my $t2 = mod_exp($key->pub_key, $u2, $key->p);
# print "pub_key = " . $key->pub_key . "\n";
# print "u2 = " . $u2 . "\n";
# print "p = " . $key->p . "\n";
# print "t2 = $t2\n";
# $u1 = ($t1 * $t2) % $key->p;
# $u1 %= $key->q;
# $u1 == $sig->r;
# }
# print verify(Message => 'nina@blues.org::Nina Simone::1072137320',
# Key => $dsa_key,
# Signature => new Crypt::DSA::Signature(
# r => "179524654873292192810669641349818294463683984472",
# s => "32636895355904099107265678275162258563954033951"))
# ? "verified\n" : "incorrect\n";
SKIP: {
my $package = 'Math::Pari';
eval "use $package qw( PARI )";
skip("$package not installed: $@", 1) if $@;
sub mp2bin {
my($p) = @_;
$p = PARI($p);
my $base = PARI(1) << PARI(4*8);
my $res = '';
while ($p != 0) {
my $r = $p % $base;
$p = ($p-$r) / $base;
my $buf = pack 'N', $r;
if ($p == 0) {
$buf = $r >= 16777216 ? $buf :
$r >= 65536 ? substr($buf, -3, 3) :
$r >= 256 ? substr($buf, -2, 2) :
substr($buf, -1, 1);
}
$res = $buf . $res;
}
$res;
}
my $test = "45625656646468483212118818097681354668381384573545315";
is(dec2bin($test), mp2bin($test), 'dec2bin');
}