Tools.pm

package IdPAccountManager::Tools;

use Template;
use Digest::SHA;

my %log_levels = ('debug' => 0, 'info' => 1, 'trace' => 1, 'notice' => 2, 'error' => 3);


# get SHA256 hash for a string
sub sha256_hash {
    my $s = shift;
    
    return &Digest::SHA::sha256_base64($s);
}

# This function generates a random password
sub generate_password{
        my $length_of_randomstring=10;# the length of 
         # the random string to generate
        
        # plusieurs tirages :
        # 1-tirage des caractères obligatoires : les mettre dans un tableau
        my @uppers=('A'..'N','P'..'Z');
        my @lowers=('a'..'k','m'..'z');
        my @punctuation=('%',';',':','!','?','&','$','*','(',')','{','}','[',']','<','>','.','=','-','#');
        my @numerics=('0'..'9');
        my @rndtab;
        push(@rndtab,$uppers[rand @uppers]);
        push(@rndtab,$lowers[rand @lowers]);
        push(@rndtab,$punctuation[rand @punctuation]);

        ## Pas de caractères 8bit pour l'antispam
        push(@rndtab,$numerics[rand @numerics]);
        
        # 2-tirage des caractères optionnels : les ajouter au tableau
        my @chars=('a'..'k','m'..'z','A'..'N','P'..'Z','0'..'9','_','%',';',':','!','?','&','$','*','(',')','{','}','[',']','<','>','.','=','-','#');
        foreach (6..$length_of_randomstring) {
                # rand @chars will generate a random 
                # number between 0 and scalar @chars
                push(@rndtab,$chars[rand @chars]);
        }
        
        # 3-ordonnancement de ceux-ci : les retirer aléatoirement du tableau en les concaténant dans une chaîne
        my $rndstring='';
        my $cpt=1;
        while($cpt<=$length_of_randomstring) {
                my $indice = rand @rndtab;
                $rndstring.=$rndtab[$indice];
                splice (@rndtab, $indice, 1);
                $cpt+=1;
        }
        return $rndstring;
}

## Updates simpleSamlPhp authsources.php configuration file
sub update_ssp_authsources {
    
    my $tt2 = Template->new({'INCLUDE_PATH' => $IdPAccountManager::Conf::global{'root_manager_dir'}.':'.$IdPAccountManager::Conf::global{'root_manager_dir'}.'/templates/accountProfiles'});
    my %args = ('accounts' => IdPAccountManager::TestAccount::list_test_accounts(),
                'conf' => \%IdPAccountManager::Conf::global);
    
    #chdir $IdPAccountManager::Conf::global{'root_manager_dir'};
    
    my $template_file = 'templates/accountProfiles/valid-accounts.php.tt2';
    my $output_file = 'conf/valid-accounts.php';
    #printf "Trace : in=%s, out=%s\n", $template_file, $output_file;
    unless ($tt2->process($template_file, \%args, $output_file)) {
        IdPAccountManager::Tools::do_log('error', "Failed to update valid-accounts.php: %s", $tt2->error());
        return undef;
    }
    
}

## Dump a variable's content
sub dump_var {
    my ($var, $level, $fd) = @_;
    
    if (ref($var)) {
        if (ref($var) eq 'ARRAY') {
            foreach my $index (0..$#{$var}) {
                print $fd "\t"x$level.$index."\n";
                &dump_var($var->[$index], $level+1, $fd);
            }
        }elsif (ref($var) eq 'HASH') {
            foreach my $key (sort keys %{$var}) {
                print $fd "\t"x$level.'_'.$key.'_'."\n";
                &dump_var($var->{$key}, $level+1, $fd);
            }    
        }else {
            if (defined $var) {
                print $fd "\t"x$level."'$var'"."\n";
            }else {
                print $fd "\t"x$level."UNDEF\n";
            }
        }
    }else {
        if (defined $var) {
            print $fd "\t"x$level."'$var'"."\n";
        }else {
            print $fd "\t"x$level."UNDEF\n";
        }
    }
}

sub do_log {
    my $level = shift;
    my $message = shift;

    unless ($log_levels{$level} < $log_levels{$IdPAccountManager::Conf::global{'log_level'}}) {

        ## Determine calling function and parameters
        ## If in 'err' level, build a stack trace
        my $caller_string;
        if ($level eq 'error'){
            my $go_back = 1;
            my @calls;
            while (my @call = caller($go_back)) {
                unshift @calls, $call[3].'#'.$call[2];
                $go_back++;
            }
        
            $caller_string = join(' > ',@calls);
        }else {
            my @call = caller(1);
                
            $caller_string = $call[3].'()';
        }

        $level = uc($level);
        my $ip = $ENV{'REMOTE_HOST'}.'/'.$ENV{'REMOTE_ADDR'} || 'NOIP';
        my $date = POSIX::strftime ("%Y:%m:%d %H:%M:%S", localtime(time));
        my $user = lc($ENV{'mail'}) || 'NOEMAIL';
        open TMP, ">>".$IdPAccountManager::Conf::global{'log_file'}; printf TMP "$date - ($level) - $ip - $user - $caller_string $message\n", @_; close TMP;       
    }
    return 1;
}

## Send a mail notice
## Default is to send email to the manager admins, unless other recipients are specified
## mail_notice(IN)
## IN is a HASH with expected entries :
##   template : mail template file
##   data : data used by the TT2 parser
sub mail_notice {
  my %in = @_;
  my $tt2_file = $in{'template'};
  my $mail_data = $in{'data'};

  $mail_data->{'conf'} ||= \%IdPAccountManager::Conf::global;

  my $notice_email = $in{'to'} || $IdPAccountManager::Conf::global{'admin_email'};
  $mail_data->{'to'} = $notice_email;
  
  ## Protection to prevent notifications during test dev phases
  ## Notify only adresses @renater.fr
  if ($IdPAccountManager::Conf::global{'no_mail_outside'}) {
	foreach my $email (split /,/, $notice_email) {
		unless ($email =~ /\@(cru|renater)\.fr$/) {
			&do_log('error',"Notification to an external address skipped");
			return undef;
		}
	}
  }

  &do_log('trace', '(template=%s, to=%s)', $in{'template'}, $mail_data->{'to'});

  open SENDMAIL, "|/usr/sbin/sendmail -f ".$IdPAccountManager::Conf::global{'notice_from'}." $notice_email";

  my $tt2 = Template->new(FILTERS => {qencode => [\&qencode, 0]});
  unless ($tt2->process($tt2_file, $mail_data, \*SENDMAIL)) {
      &do_log('error', "Erreur TT2 : %s", $tt2->error());
  }
  close SENDMAIL;
}

sub qencode {
    my $string = shift;
    # We are not able to determine the name of header field, so assume
    # longest (maybe) one.    
    return MIME::EncWords::encode_mimewords(Encode::decode('utf8', $string),
					    Encoding=>'A',
					    Charset=> 'utf8',
					    Field=>"subject");
}

## usefull to pass parameters to TT2
sub encode_utf8 ($) {
	my $string = shift||'';
	
	return Encode::encode('utf8', $string);
}

## usefull to pass parameters to TT2
sub escape_quotes {
	my $string = shift;
	
	$string =~ s/\'/\\\'/g;
	
	return $string;
}

1; # Magic true value required at end of module
__END__

=head1 NAME

IdPAccountManager::Tools - Set of subroutines usefull for the Account manager

=head1 SYNOPSIS

=head1 DESCRIPTION

=head1 SUBROUTINES/METHODS

=head1 AUTHOR

Olivier Salaün (olivier.salaun@renater.fr)