110 lines
2.7 KiB
Plaintext
110 lines
2.7 KiB
Plaintext
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#!/usr/bin/perl -w
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=head1 NAME
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auth_cvm_unix_local - SMTP AUTH LOGIN module using
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Bruce Guenther's Credential Validation Module (CVM)
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http://untroubled.org/cvm/
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=head1 SYNOPSIS
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In config/plugins:
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auth/auth_cvm_unix_local \
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cvm_socket /var/lib/cvm/cvm-unix-local.socket \
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enable_smtp no \
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enable_ssmtp yes
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=head1 BUGS
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- Should probably handle auth-cram-md5 as well. However, this requires
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access to the plain text password. We could store a separate database
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of passwords purely for SMTP AUTH, for example as an optional
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SMTPAuthPassword property of an account in the esmith::AccountsDB;
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=head1 DESCRIPTION
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This plugin implements an authentication plugin using Bruce Guenther's
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Credential Validation Module (http://untroubled.org/cvm).
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=head1 AUTHOR
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Copyright 2005 Gordon Rowell <gordonr@gormand.com.au>
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This software is free software and may be distributed or modified
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under the same terms as Perl itself.
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=head1 VERSION
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Version $Id: auth_cvm_unix_local,v 1.1 2005/06/09 22:50:06 gordonr Exp gordonr $
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=cut
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use Socket;
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use constant SMTP_PORT => getservbyname("smtp", "tcp") || 25;
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use constant SSMTP_PORT => getservbyname("ssmtp", "tcp") || 465;
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sub register
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{
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my ( $self, $qp, %arg ) = @_;
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unless ($arg{cvm_socket})
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{
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$self->log(LOGERROR, "authcvm - requires cvm_socket argument");
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return 0;
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}
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$self->{_enable_smtp} = $arg{enable_smtp} || 'no';
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$self->{_enable_ssmtp} = $arg{enable_ssmtp} || 'yes';
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my $port = $ENV{PORT} || SMTP_PORT;
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return 0 if ($port == SMTP_PORT and $self->{_enable_smtp} ne 'yes');
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return 0 if ($port == SSMTP_PORT and $self->{_enable_ssmtp} ne 'yes');
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if ($arg{cvm_socket} =~ /^([\w\/.-]+)$/)
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{
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$self->{_cvm_socket} = $1;
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}
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unless (-S $self->{_cvm_socket})
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{
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$self->log(LOGERROR, "authcvm - cvm_socket missing or not usable");
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return 0;
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}
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$self->register_hook("auth-plain", "authcvm_plain");
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$self->register_hook("auth-login", "authcvm_plain");
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# $self->register_hook("auth-cram-md5", "authcvm_hash");
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}
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sub authcvm_plain
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{
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my ( $self, $transaction, $method, $user, $passClear, $passHash, $ticket ) =
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@_;
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$self->log(LOGINFO, "authcvm/$method authentication attempt for: $user");
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socket(SOCK, PF_UNIX, SOCK_STREAM, 0)
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or return (DENY, "authcvm/$method");
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connect(SOCK, sockaddr_un($self->{_cvm_socket}))
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or return (DENY, "authcvm/$method");
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my $o = select(SOCK); $| = 1; select($o);
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my ($u, $host) = split(/\@/, $user);
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$host ||= "localhost";
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print SOCK "\001$u\000$host\000$passClear\000\000";
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shutdown SOCK, 1;
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my $ret = <SOCK>;
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my ($s) = unpack ("C", $ret);
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return (
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($s ? $s == 100 ? DENY : DECLINED
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: OK),
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"authcvm/$method");
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}
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