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Edit File: b1sendmail

#! /usr/bin/perl

use warnings;
use strict;
use Getopt::Long::Descriptive;
use POSIX;
use Text::Header;
use Net::SMTPS;
use Digest::SHA qw(sha1_hex);
use JSON;

my $debug = $ENV{DEBUG} || 0;
# Constants

my %config = (smtp_server => 'mailout.one.com',
	      smtp_port => 587,
	      ssl => 'starttls',
	      );

# Global variables
my @headers = ();
my @message = ();
my $reading_headers = 1;
my %headers_h;
my $line;

sub getjson(){
      local $/;
      open( my $fh, '<', '/run/mail.conf' );
      my $json_text   = <$fh>;
      return decode_json( $json_text );
}

my ($opt, $usage) = describe_options(
    'b1sendmail %o <some-arg>',
    ["i=i", "Set to 1 to continue beyond . + newline",  { default  => 0 }],
    ["f|r=s", "From address"],
    ["t=s", "To address"]
);

while (defined($line = <STDIN>) and ($opt->i or ($line ne ".\n"))) {
    chomp $line;
    if ($reading_headers) {
	if ($line) {
	    push @headers, $line;
	} else {
	    $reading_headers = 0;
 	}
    } else {
	push @message, $line;
    }
}

%headers_h = unheader(@headers);

my $uid = getuid();
my $domain_name = getpwuid($uid);

my $envelope_from = "";

if (defined($headers_h{'from'})) {
    my $env_from = $headers_h{'from'};
# Clean out comments
    $env_from =~ s/^([^@]+@[^@]+?)\s+$.*$$/$1/;
    if ($env_from =~ /.\@([a-z0-9-]+\.)+[a-z]{2,20}\s*>?\s*\r?$/i) {

$env_from = $1 if($env_from =~ /<([^\>]+)>/);

$envelope_from = $env_from;
    } else {
	exit 1 if ($config{b1sendmail_reject_bad_from});
	$envelope_from = $env_from;
    }
}

$envelope_from =~ s/^[\s\r\n<]+//gismo;
$envelope_from =~ s/[\s\r\n>]+$//gismo;

my $sasluser = $domain_name;

if (defined($opt->f)) {
    if ($opt->f =~ /.\@[a-z0-9-]+\.[a-z]{2,20}$/i) {
	$envelope_from = $opt->f;
    } else {
	exit 1 if ($config{b1sendmail_reject_bad_from});
	$envelope_from = $opt->f;
    }
}

my @envelope_to = ();
if (@ARGV) {
    @envelope_to = @ARGV;
}
if (defined($opt->t)) {
    if (defined($headers_h{'to'})) {
	push @envelope_to, split /, ?/,$headers_h{'to'};
    }
    if (defined($headers_h{'cc'})) {
	push @envelope_to, split /, ?/,$headers_h{'cc'};
    }
    if (defined($headers_h{'bcc'})) {
	push @envelope_to, split /, ?/,$headers_h{'bcc'};
    }
}
unless (defined($headers_h{'to'}) or
	defined($headers_h{'cc'}) or
	defined($headers_h{'bcc'})) {
    $headers_h{'bcc'} = '';
}

my $smtp=Net::SMTPS->new($config{smtp_server}, Port => $config{smtp_port}, Hello => $domain_name, doSSL => $config{ssl});
unless ($smtp) {
	exit 1;
}

my $j = getjson();
my $pass = '$sha1$' . $j->{'hash'};

if($j->{'username'}) {
    $sasluser = $j->{'username'};
    $pass = '$sha2$' . $j->{'hash'};
}

$smtp->auth($sasluser, $pass, 'PLAIN')
    or exit 1;

$smtp->mail($envelope_from)
    or exit 1;
$smtp->to(@envelope_to)
    or exit 1;
unless ($smtp->data()) {
    my $smtpcode = $smtp->code();
    exit 1;
}
foreach (@headers) {
    $smtp->datasend($_."\n");
}
$smtp->datasend("\n");

foreach (@message) {
    $smtp->datasend($_."\n");
}
$smtp->dataend()
    or exit 1;
$smtp->quit;