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# -*-Perl-*-
################################################################
###
### GetPass.pm
###
### Author: Internet Message Group <img@mew.org>
### Created: Apr 30, 1997
### Revised: Feb 28, 2000
###
my $PM_VERSION = "IM::GetPass.pm version 20000228(IM140)";
package IM::GetPass;
require 5.003;
require Exporter;
use IM::Config;
use IM::Util;
use integer;
use strict;
use vars qw(@ISA @EXPORT);
@ISA = qw(Exporter);
@EXPORT = qw(getpass getpass_interact
loadpass savepass connect_agent talk_agent findpass);
=head1 NAME
GetPass - Get password from tty or ...
=head1 SYNOPSIS
($pass, $agtfound, $interact) = getpass('imap', $auth, $host, $user);
=head1 DESCRIPTION
=cut
sub getpass ($$$$) {
my($proto, $auth, $host, $user) = @_;
my $pass = '';
my $agtfound = 0;
my $interact = 0;
if (&usepwagent()) {
$pass = &loadpass($proto, $auth, $host, $user);
$agtfound = 1 if ($pass ne '');
}
if ($pass eq '' && &usepwfiles()) {
$pass = &findpass($proto, $auth, $host, $user);
}
my $prompt = lc("$proto/$auth:$user\@$host");
if ($pass eq '') {
$pass = &getpass_interact("Password ($prompt): ");
$interact = 1;
}
return ($pass, $agtfound, $interact);
}
sub getpass_interact ($) {
my ($prompt) = @_;
my ($secret, $termios, $c_lflag);
if (! -t STDIN) {
# stty is not effective for Mule since it's not terminal base.
# Anyway, Mew never echos back even if getpass echos back.
} elsif (eval 'require POSIX' & ! win95p() ) {
import POSIX qw(termios_h);
$termios = new POSIX::Termios;
$termios->getattr(fileno(STDIN));
$c_lflag = $termios->getlflag;
$termios->setlflag($c_lflag & ~&POSIX::ECHO);
$termios->setattr(fileno(STDIN), &POSIX::TCSANOW);
} elsif (unixp()) { # non-POSIX-ish UNIX.
# stty might be available.
my ($OldPath) = $ENV{'PATH'}; # for SUID version
$ENV{'PATH'} = '/bin:/usr/bin';
system('/bin/stty -echo'); # Ignore errors.
$ENV{'PATH'} = $OldPath;
}
# POSIX doesn't exist for Win95, sigh.
print STDERR $prompt;
flush('STDERR');
chomp($secret = <STDIN>);
print STDERR "\n";
flush('STDERR');
if (! -t STDIN) {
# no operation
} elsif (defined $termios) { # POSIX-ish
$termios->setlflag($c_lflag);
$termios->setattr(fileno(STDIN), &POSIX::TCSANOW);
} elsif (unixp()) { # non-POSIX-ish UNIX.
my ($OldPath) = $ENV{'PATH'}; # for SUID version
$ENV{'PATH'} = '/bin:/usr/bin';
system('/bin/stty echo'); # Ignore errors.
$ENV{'PATH'} = $OldPath;
}
return $secret;
}
sub loadpass ($$$$) {
my ($proto, $auth, $path, $user) = @_;
local ($_);
my $key = &connect_agent(0);
return '' if ($key eq '');
my @keys = unpack('C*', $key);
my $pass = &talk_agent("LOAD\t$proto\t$auth\t$path\t$user\n");
if ($pass =~ /^PASS\t(.*)/) {
my @tmp1 = unpack('C*', pack('H*', $1));
my $sum1 = $keys[0];
foreach (@tmp1) {
$sum1 += $keys[1];
my $tmp2 = $_;
$_ -= $sum1;
$_ &= 0xff;
$sum1 = $tmp2;
}
return pack('C*', @tmp1);
} else {
return '';
}
}
sub savepass ($$$$$) {
my ($proto, $auth, $path, $user, $pass) = @_;
local ($_);
my $key = &connect_agent(0);
return '' if ($key eq '');
my @keys = unpack('C*', $key);
my @tmp1 = unpack('C*', $pass);
my $sum1 = $keys[0];
foreach (@tmp1) {
$sum1 += $_ + $keys[1];
$sum1 &= 0xff;
$_ = $sum1;
}
$pass = unpack('H*', pack('C*', @tmp1));
&talk_agent("SAVE\t$proto\t$auth\t$path\t$user\nPASS\t$pass\n", 0);
}
sub connect_agent ($) {
my ($surpresserror) = shift;
require Socket && import Socket;
my $realuser = im_getlogin();
unless ($realuser) {
im_warn("pwagent: can not get login name\n") unless ($surpresserror);
return '';
}
my $dir = "/tmp/im-$realuser";
my $port = &pwagentport();
if ($port > 0) {
unless (socket(SOCK, &AF_INET, &SOCK_STREAM, 0)) {
im_warn("pwagent: socket: $!\n") unless ($surpresserror);
return '';
}
my $sin = sockaddr_in($port, inet_aton('127.0.0.1'));
unless (connect(SOCK, $sin)) {
im_warn("pwagent: connect: $!\n") unless ($surpresserror);
return '';
}
} else {
my $name = "$dir/pw";
unless (-S $name) {
im_warn("pwagent: can not access to socket: $name\n")
unless ($surpresserror);
return '';
}
my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev) = stat($dir);
if ($mode & 0077) {
im_warn("pwagent: invalid mode: $dir\n") unless ($surpresserror);
return '';
}
($dev,$ino,$mode,$nlink,$uid,$gid,$rdev) = stat($name);
if ($mode & 0077) {
im_warn("pwagent: invalid mode: $name\n") unless ($surpresserror);
return '';
}
unless (socket(SOCK, &AF_UNIX, &SOCK_STREAM, 0)) {
im_warn("pwagent: socket: $!\n") unless ($surpresserror);
return '';
}
my $sun = sockaddr_un($name);
unless (connect(SOCK, $sun)) {
im_warn("pwagent: connect: $!\n") unless ($surpresserror);
return '';
}
}
select(SOCK); $| = 1; select(STDOUT);
my $res = <SOCK>;
chomp($res);
return $res;
}
sub talk_agent ($) {
my ($msg) = shift;
print SOCK $msg;
my $res = <SOCK>;
shutdown (SOCK, 2);
close(SOCK);
chomp($res);
return $res;
}
sub findpass($$$$) {
my ($proto, $auth, $host, $user) = @_;
local ($_);
my ($passfile);
foreach $passfile (split(',', &pwfiles())) {
$passfile = &expand_path($passfile);
next unless (open (PASSFILE, "<$passfile"));
while (<PASSFILE>) {
chomp;
next if (/^(#.*)?$/);
# s/\s+(\#.*)?$//; # remove comments
if (/^(\S+)\s+(\S+)\s+(\S+)\s+(\S.+)$/) {
my ($tmp_host, $tmp_user, $tmp_pass) = ($2, $3, $4);
my ($tmp_proto, $tmp_auth) = split('/', $1);
if (($tmp_proto eq $proto)
&& ($tmp_auth eq $auth)
&& ($tmp_host eq $host)
&& ($tmp_user eq $user)) {
close (PASSFILE);
return $tmp_pass;
}
}
}
close (PASSFILE);
}
return '';
}
1;
### Copyright (C) 1997, 1998, 1999 IM developing team
### All rights reserved.
###
### Redistribution and use in source and binary forms, with or without
### modification, are permitted provided that the following conditions
### are met:
###
### 1. Redistributions of source code must retain the above copyright
### notice, this list of conditions and the following disclaimer.
### 2. Redistributions in binary form must reproduce the above copyright
### notice, this list of conditions and the following disclaimer in the
### documentation and/or other materials provided with the distribution.
### 3. Neither the name of the team nor the names of its contributors
### may be used to endorse or promote products derived from this software
### without specific prior written permission.
###
### THIS SOFTWARE IS PROVIDED BY THE TEAM AND CONTRIBUTORS ``AS IS'' AND
### ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
### IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
### PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE TEAM OR CONTRIBUTORS BE
### LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
### CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
### SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
### BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
### WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
### OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
### IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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