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package Bugzilla::DuoAPI;
use strict;
use warnings;
our $VERSION = '1.0';
=head1 NAME
Duo::API - Reference client to call Duo Security's API methods.
=head1 SYNOPSIS
use Duo::API;
my $client = Duo::API->new('INTEGRATION KEY', 'SECRET KEY', 'HOSTNAME');
my $res = $client->json_api_call('GET', '/auth/v2/check', {});
=head1 SEE ALSO
Duo for Developers: L<https://www.duosecurity.com/api>
=head1 COPYRIGHT
Copyright (c) 2013 Duo Security
This program is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=head1 DESCRIPTION
Duo::API objects have the following methods:
=over 4
=item new($integration_key, $integration_secret_key, $api_hostname)
Returns a handle to sign and send requests. These parameters are
obtained when creating an API integration.
=item json_api_call($method, $path, \%params)
Make a request to an API endpoint with the given HTTPS method and
parameters. Returns the parsed result if successful or dies with the
error message from the Duo Security service.
=item api_call($method, $path, \%params)
Make a request without parsing the response.
=item canonicalize_params(\%params)
Serialize a parameter hash reference to a string to sign or send.
=item sign($method, $path, $canon_params, $date)
Return the Authorization header for a request. C<$canon_params> is the
string returned by L<canonicalize_params>.
=back
=cut
use CGI qw();
use Carp qw(croak);
use Digest::HMAC_SHA1 qw(hmac_sha1_hex);
use JSON qw(decode_json);
use LWP::UserAgent;
use MIME::Base64 qw(encode_base64);
use POSIX qw(strftime);
sub new {
my ($proto, $ikey, $skey, $host) = @_;
my $class = ref($proto) || $proto;
my $self = {'ikey' => $ikey, 'skey' => $skey, 'host' => $host,};
bless($self, $class);
return $self;
}
sub canonicalize_params {
my ($self, $params) = @_;
my @ret;
while (my ($k, $v) = each(%{$params})) {
push(@ret, join('=', CGI::escape($k), CGI::escape($v)));
}
return join('&', sort(@ret));
}
sub sign {
my ($self, $method, $path, $canon_params, $date) = @_;
my $canon
= join("\n", $date, uc($method), lc($self->{'host'}), $path, $canon_params);
my $sig = hmac_sha1_hex($canon, $self->{'skey'});
my $auth = join(':', $self->{'ikey'}, $sig);
$auth = 'Basic ' . encode_base64($auth, '');
return $auth;
}
sub api_call {
my ($self, $method, $path, $params) = @_;
$params ||= {};
my $canon_params = $self->canonicalize_params($params);
my $date = strftime('%a, %d %b %Y %H:%M:%S -0000', gmtime(time()));
my $auth = $self->sign($method, $path, $canon_params, $date);
my $ua = LWP::UserAgent->new();
my $req = HTTP::Request->new();
$req->method($method);
$req->protocol('HTTP/1.1');
$req->header('If-SSL-Cert-Subject' => qr{CN=[^=]+\.duosecurity.com$});
$req->header('Authorization' => $auth);
$req->header('Date' => $date);
$req->header('Host' => $self->{'host'});
if (grep(/^$method$/, qw(POST PUT))) {
$req->header('Content-type' => 'application/x-www-form-urlencoded');
$req->content($canon_params);
}
else {
$path .= '?' . $canon_params;
}
$req->uri('https://' . $self->{'host'} . $path);
if ($ENV{'DEBUG'}) {
print STDERR $req->as_string();
}
my $res = $ua->request($req);
return $res;
}
sub json_api_call {
my $self = shift;
my $res = $self->api_call(@_);
my $json = $res->content();
if ($json !~ /^{/) {
croak($json);
}
my $ret = decode_json($json);
if (($ret->{'stat'} || '') ne 'OK') {
my $msg = join('', 'Error ', $ret->{'code'}, ': ', $ret->{'message'});
if (defined($ret->{'message_detail'})) {
$msg .= ' (' . $ret->{'message_detail'} . ')';
}
croak($msg);
}
return $ret->{'response'};
}
1;
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