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File Name : Passwd.pm

package Authen::Simple::Passwd;

use strict;
use warnings;
use bytes;
use base 'Authen::Simple::Adapter';

use Carp             qw[];
use Config           qw[];
use Fcntl            qw[LOCK_SH];
use IO::File         qw[O_RDONLY];
use Params::Validate qw[];

our $VERSION = 0.6;

__PACKAGE__->options({
    path => {
        type      => Params::Validate::SCALAR,
        optional  => 1
    },
    flock => {
        type      => Params::Validate::SCALAR,
        default   => ( $Config::Config{d_flock} ) ? 1 : 0,
        optional  => 1
    },
    passwd => {  # deprecated
        type      => Params::Validate::SCALAR,
        optional  => 1
    },
    allow => {   # deprecated
        type      => Params::Validate::ARRAYREF,
        optional  => 1,
    }
});

sub init {
    my ( $self, $params ) = @_;

my $path = $params->{path} ||= delete $params->{passwd};

unless ( -e $path ) {
        Carp::croak( qq/Passwd path '$path' does not exist./ );
    }

unless ( -f _ ) {
        Carp::croak( qq/Passwd path '$path' is not a file./ );
    }

unless ( -r _ ) {
        Carp::croak( qq/Passwd path '$path' is not readable by effective uid '$>'./ );
    }

return $self->SUPER::init($params);
}

sub check {
    my ( $self, $username, $password ) = @_;

if ( $username =~ /^-/ ) {

$self->log->debug( qq/User '$username' begins with a hyphen which is not allowed./ )
          if $self->log;

return 0;
    }

my ( $path, $fh, $encrypted ) = ( $self->path, undef, undef );

unless ( $fh = IO::File->new( $path, O_RDONLY ) ) {

$self->log->error( qq/Failed to open passwd '$path'. Reason: '$!'/ )
          if $self->log;

return 0;
    }

unless ( !$self->flock || flock( $fh, LOCK_SH ) ) {

$self->log->error( qq/Failed to obtain a shared lock on passwd '$path'. Reason: '$!'/ )
          if $self->log;

return 0;
    }

while ( defined( $_ = $fh->getline ) ) {

next if /^#/;
        next if /^\s+/;

chop;

my (@credentials) = split( /:/, $_, 3 );

if ( $credentials[0] eq $username ) {

$encrypted = $credentials[1];

$self->log->debug( qq/Found user '$username' in passwd '$path'./ )
              if $self->log;

last;
        }
    }

unless ( $fh->close ) {

$self->log->warn( qq/Failed to close passwd '$path'. Reason: '$!'/ )
          if $self->log;
    }

unless ( defined $encrypted ) {

$self->log->debug( qq/User '$username' was not found in passwd '$path'./ )
          if $self->log;

return 0;
    }

unless ( length $encrypted ) {

$self->log->debug( qq/Encrypted password for user '$username' is null./ )
          if $self->log;

return 0;
    }

unless ( $self->check_password( $password, $encrypted ) ) {

$self->log->debug( qq/Failed to authenticate user '$username'. Reason: 'Invalid credentials'/ )
          if $self->log;

return 0;
    }

$self->log->debug( qq/Successfully authenticated user '$username'./ )
      if $self->log;

return 1;
}

__END__

=head1 NAME

Authen::Simple::Passwd - Simple Passwd authentication

=head1 SYNOPSIS

use Authen::Simple::Passwd;
    
    my $passwd = Authen::Simple::Passwd->new( 
        path => '/etc/passwd'
    );
    
    if ( $passwd->authenticate( $username, $password ) ) {
        # successfull authentication
    }
    
    # or as a mod_perl Authen handler
    
    PerlModule Authen::Simple::Apache
    PerlModule Authen::Simple::Passwd

PerlSetVar AuthenSimplePasswd_path "/etc/passwd"

<Location /protected>
      PerlAuthenHandler Authen::Simple::Passwd
      AuthType          Basic
      AuthName          "Protected Area"
      Require           valid-user
    </Location>

=head1 DESCRIPTION

Authenticate against a passwd file.

=head1 METHODS

=over 4

=item * new

This method takes a hash of parameters. The following options are valid:

=over 8

=item * path

Path to passwd file to authenticate against. Any standard passwd file that 
has records seperated with newline and fields seperated by C<:> is supported.
First field is expected to be username and second field, plain or encrypted 
password. Required.

path => '/etc/passwd'
    path => '/var/www/.htpasswd'
    
=item * flock

A boolean to enable or disable the usage of C<flock()>. Defaults to C<d_flock> in L<Config>.

flock => 0

=item * log

Any object that supports C<debug>, C<info>, C<error> and C<warn>.

log => Log::Log4perl->get_logger('Authen::Simple::Passwd')

=back

=item * authenticate( $username, $password )

Returns true on success and false on failure. Authentication attempts with a username that begins with a 
hyphen C<-> will always return false.

=back

=head1 SEE ALSO

L<Authen::Simple>.

L<Authen::Simple::Password>.

L<passwd(5)>.

=head1 AUTHOR

Christian Hansen C<ch@ngmedia.com>

=head1 COPYRIGHT

This program is free software, you can redistribute it and/or modify 
it under the same terms as Perl itself.

=cut

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2023-08-25 11:53:14
..	dir	-	root/root	0755	2023-08-25 11:53:16
Adapter.pm	text/plain	6.37 KB	root/root	0644	2012-04-19 04:55:44
Apache.pm	text/plain	4.11 KB	root/root	0644	2012-04-19 04:55:42
Log.pm	text/plain	1.48 KB	root/root	0644	2012-04-19 04:36:16
Passwd.pm	text/plain	4.95 KB	root/root	0644	2014-02-12 03:06:34
Password.pm	text/plain	4.56 KB	root/root	0644	2012-04-19 04:55:49

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