X-Git-Url: https://vcs.fsf.org/?a=blobdiff_plain;f=config%2Fconf.pl;h=d72085f5d3de760481d60640d90bc74bfb1884a9;hb=6614128e580396f5e881fa058c1935b0ee2fc867;hp=2215074e5057f852be87ec482d227f298281366f;hpb=bcbbfc89439a606b7bc1da187c16af8568715885;p=squirrelmail.git diff --git a/config/conf.pl b/config/conf.pl index 2215074e..d72085f5 100755 --- a/config/conf.pl +++ b/config/conf.pl @@ -1,12 +1,14 @@ #!/usr/bin/env perl # conf.pl -# Luke Ehresman (luke@squirrelmail.org) # -# A simple configure script to configure squirrelmail +# Copyright (c) 1999-2003 The SquirrelMail Project Team +# Licensed under the GNU GPL. For full terms see COPYING. +# +# A simple configure script to configure SquirrelMail # # $Id$ ############################################################ -$conf_pl_version = "1.2.0"; +$conf_pl_version = "1.4.0"; ############################################################ # Check what directory we're supposed to be running in, and @@ -270,9 +272,6 @@ if ( !$force_username_lowercase ) { if ( !$optional_delimiter ) { $optional_delimiter = "detect"; } -if ( !$use_authenticated_smtp ) { - $use_authenticated_smtp = "false"; -} if ( !$auto_create_special ) { $auto_create_special = "false"; } @@ -334,6 +333,26 @@ if ( !$prefs_val_field ) { $prefs_val_field = 'prefval'; } +if ( !$use_smtp_tls) { + $use_smtp_tls= 'false'; +} + +if ( !$smtp_auth_mech ) { + $smtp_auth_mech = 'none'; +} + +if ( !$use_imap_tls ) { + $use_imap_tls = 'false'; +} + +if ( !$imap_auth_mech ) { + $imap_auth_mech = 'plain'; +} + +if (!$session_name ) { + $session_name = 'SQMSESSID'; +} + if ( $ARGV[0] eq '--install-plugin' ) { print "Activating plugin " . $ARGV[1] . "\n"; push @plugins, $ARGV[1]; @@ -398,28 +417,67 @@ while ( ( $command ne "q" ) && ( $command ne "Q" ) ) { print "\n"; print "R Return to Main Menu\n"; } elsif ( $menu == 2 ) { - print $WHT. "Server Settings\n" . $NRM; - print "1. Domain : $WHT$domain$NRM\n"; - print "2. IMAP Server : $WHT$imapServerAddress$NRM\n"; - print "3. IMAP Port : $WHT$imapPort$NRM\n"; - print "4. Use Sendmail/SMTP : $WHT"; + print $WHT. "Server Settings\n\n" . $NRM; + print $WHT . "General" . $NRM . "\n"; + print "-------\n"; + print "1. Domain : $WHT$domain$NRM\n"; + print "2. Invert Time : $WHT$invert_time$NRM\n"; + print "3. Sendmail or SMTP : $WHT"; if ( lc($useSendmail) eq "true" ) { print "Sendmail"; } else { print "SMTP"; } print "$NRM\n"; - if ( lc($useSendmail) eq "true" ) { - print "5. Sendmail Path : $WHT$sendmail_path$NRM\n"; - } else { - print "6. SMTP Server : $WHT$smtpServerAddress$NRM\n"; - print "7. SMTP Port : $WHT$smtpPort$NRM\n"; - print "8. Authenticated SMTP : $WHT$use_authenticated_smtp$NRM\n"; - print "9. POP Before SMTP : $WHT$pop_before_smtp$NRM\n"; + print "\n"; + + if ( $show_imap_settings ) { + print $WHT . "IMAP Settings". $NRM . "\n--------------\n"; + print "4. IMAP Server : $WHT$imapServerAddress$NRM\n"; + print "5. IMAP Port : $WHT$imapPort$NRM\n"; + print "6. Authentication type : $WHT$imap_auth_mech$NRM\n"; + print "7. Secure IMAP (TLS) : $WHT$use_imap_tls$NRM\n"; + print "8. Server software : $WHT$imap_server_type$NRM\n"; + print "9. Delimiter : $WHT$optional_delimiter$NRM\n"; + print "\n"; + } elsif ( $show_smtp_settings ) { + if ( lc($useSendmail) eq "true" ) { + print $WHT . "Sendmail" . $NRM . "\n--------\n"; + print "4. Sendmail Path : $WHT$sendmail_path$NRM\n"; + print "\n"; + } else { + print $WHT . "SMTP Settings" . $NRM . "\n-------------\n"; + print "4. SMTP Server : $WHT$smtpServerAddress$NRM\n"; + print "5. SMTP Port : $WHT$smtpPort$NRM\n"; + print "6. POP before SMTP : $WHT$pop_before_smtp$NRM\n"; + print "7. SMTP Authentication : $WHT$smtp_auth_mech$NRM\n"; + print "8. Secure SMTP (TLS) : $WHT$use_smtp_tls$NRM\n"; + print "\n"; + } + } + + if ($show_imap_settings == 0) { + print "A. Update IMAP Settings : "; + print "$WHT$imapServerAddress$NRM:"; + print "$WHT$imapPort$NRM "; + print "($WHT$imap_server_type$NRM)\n"; + } + if ($show_smtp_settings == 0) { + if ( lc($useSendmail) eq "true" ) { + print "B. Change Sendmail Config : $WHT$sendmail_path$NRM\n"; + } else { + print "B. Update SMTP Settings : "; + print "$WHT$smtpServerAddress$NRM:"; + print "$WHT$smtpPort$NRM\n"; + } } - print "10. Server : $WHT$imap_server_type$NRM\n"; - print "11. Invert Time : $WHT$invert_time$NRM\n"; - print "12. Delimiter : $WHT$optional_delimiter$NRM\n"; + if ( $show_smtp_settings || $show_imap_settings ) + { + print "H. Hide " . + ($show_imap_settings ? "IMAP Server" : + (lc($useSendmail) eq "true") ? "Sendmail" : "SMTP") . " Settings\n"; + } + print "\n"; print "R Return to Main Menu\n"; } elsif ( $menu == 3 ) { @@ -446,23 +504,24 @@ while ( ( $command ne "q" ) && ( $command ne "Q" ) ) { print "R Return to Main Menu\n"; } elsif ( $menu == 4 ) { print $WHT. "General Options\n" . $NRM; - print "1. Default Charset : $WHT$default_charset$NRM\n"; - print "2. Data Directory : $WHT$data_dir$NRM\n"; - print "3. Attachment Directory : $WHT$attachment_dir$NRM\n"; - print "4. Directory Hash Level : $WHT$dir_hash_level$NRM\n"; - print "5. Default Left Size : $WHT$default_left_size$NRM\n"; - print "6. Usernames in Lowercase : $WHT$force_username_lowercase$NRM\n"; - print "7. Allow use of priority : $WHT$default_use_priority$NRM\n"; - print "8. Hide SM attributions : $WHT$hide_sm_attributions$NRM\n"; - print "9. Allow use of receipts : $WHT$default_use_mdn$NRM\n"; - print "10. Allow editing of identity : $WHT$edit_identity$NRM\n"; - print "11. Allow server thread sort : $WHT$allow_thread_sort$NRM\n"; - print "12. Allow server-side sorting : $WHT$allow_server_sort$NRM\n"; + print "1. Default Charset : $WHT$default_charset$NRM\n"; + print "2. Data Directory : $WHT$data_dir$NRM\n"; + print "3. Attachment Directory : $WHT$attachment_dir$NRM\n"; + print "4. Directory Hash Level : $WHT$dir_hash_level$NRM\n"; + print "5. Default Left Size : $WHT$default_left_size$NRM\n"; + print "6. Usernames in Lowercase : $WHT$force_username_lowercase$NRM\n"; + print "7. Allow use of priority : $WHT$default_use_priority$NRM\n"; + print "8. Hide SM attributions : $WHT$hide_sm_attributions$NRM\n"; + print "9. Allow use of receipts : $WHT$default_use_mdn$NRM\n"; + print "10. Allow editing of identity : $WHT$edit_identity$NRM\n"; + print "11. Allow server thread sort : $WHT$allow_thread_sort$NRM\n"; + print "12. Allow server-side sorting : $WHT$allow_server_sort$NRM\n"; if ( lc($edit_identity) eq "false" ) { print "13. Allow editing of name : $WHT$edit_name$NRM\n"; } print "14. Allow server charset search : $WHT$allow_charset_search$NRM\n"; - print "15. Enable UID support : $WHT$uid_support$NRM\n"; + print "15. Enable UID support : $WHT$uid_support$NRM\n"; + print "16. PHP session name : $WHT$session_name$NRM\n"; print "\n"; print "R Return to Main Menu\n"; } elsif ( $menu == 5 ) { @@ -600,18 +659,30 @@ while ( ( $command ne "q" ) && ( $command ne "Q" ) ) { elsif ( $command == 9 ) { $provider_name = command8(); } } elsif ( $menu == 2 ) { - if ( $command == 1 ) { $domain = command11(); } - elsif ( $command == 2 ) { $imapServerAddress = command12(); } - elsif ( $command == 3 ) { $imapPort = command13(); } - elsif ( $command == 4 ) { $useSendmail = command14(); } - elsif ( $command == 5 ) { $sendmail_path = command15(); } - elsif ( $command == 6 ) { $smtpServerAddress = command16(); } - elsif ( $command == 7 ) { $smtpPort = command17(); } - elsif ( $command == 8 ) { $use_authenticated_smtp = command18(); } - elsif ( $command == 9 ) { $pop_before_smtp = command18a(); } - elsif ( $command == 10 ) { $imap_server_type = command19(); } - elsif ( $command == 11 ) { $invert_time = command110(); } - elsif ( $command == 12 ) { $optional_delimiter = command111(); } + if ( $command eq "a" ) { $show_imap_settings = 1; $show_smtp_settings = 0; } + elsif ( $command eq "b" ) { $show_imap_settings = 0; $show_smtp_settings = 1; } + elsif ( $command eq "h" ) { $show_imap_settings = 0; $show_smtp_settings = 0; } + elsif ( $command <= 3 ) { + if ( $command == 1 ) { $domain = command11(); } + elsif ( $command == 2 ) { $invert_time = command110(); } + elsif ( $command == 3 ) { $useSendmail = command14(); } + $show_imap_settings = 0; $show_smtp_settings = 0; + } elsif ( $show_imap_settings ) { + if ( $command == 4 ) { $imapServerAddress = command12(); } + elsif ( $command == 5 ) { $imapPort = command13(); } + elsif ( $command == 6 ) { $imap_auth_mech = command112a(); } + elsif ( $command == 7 ) { $use_imap_tls = command113("IMAP",$use_imap_tls); } + elsif ( $command == 8 ) { $imap_server_type = command19(); } + elsif ( $command == 9 ) { $optional_delimiter = command111(); } + } elsif ( $show_smtp_settings && lc($useSendmail) eq "true" ) { + if ( $command == 4 ) { $sendmail_path = command15(); } + } elsif ( $show_smtp_settings ) { + if ( $command == 4 ) { $smtpServerAddress = command16(); } + elsif ( $command == 5 ) { $smtpPort = command17(); } + elsif ( $command == 6 ) { $pop_before_smtp = command18a(); } + elsif ( $command == 7 ) { $smtp_auth_mech = command112b(); } + elsif ( $command == 8 ) { $use_smtp_tls = command113("SMTP",$use_smtp_tls); } + } } elsif ( $menu == 3 ) { if ( $command == 1 ) { $default_folder_prefix = command21(); } elsif ( $command == 2 ) { $show_prefix_option = command22(); } @@ -647,6 +718,7 @@ while ( ( $command ne "q" ) && ( $command ne "Q" ) ) { elsif ( $command == 13 ) { $edit_name = command311(); } elsif ( $command == 14 ) { $allow_charset_search = command314(); } elsif ( $command == 15 ) { $uid_support = command315(); } + elsif ( $command == 16 ) { $session_name = command316(); } } elsif ( $menu == 5 ) { if ( $command == 1 ) { command41(); } elsif ( $command == 2 ) { $theme_css = command42(); } @@ -852,7 +924,7 @@ sub command11 { # imapServerAddress sub command12 { - print "This is the address where your IMAP server resides.\n"; + print "This is the hostname where your IMAP server can be contacted.\n"; print "[$WHT$imapServerAddress$NRM]: $WHT"; $new_imapServerAddress = ; if ( $new_imapServerAddress eq "\n" ) { @@ -918,7 +990,7 @@ sub command15 { # smtpServerAddress sub command16 { - print "This is the location of your SMTP server.\n"; + print "This is the hostname of your SMTP server.\n"; print "[$WHT$smtpServerAddress$NRM]: $WHT"; $new_smtpServerAddress = ; if ( $new_smtpServerAddress eq "\n" ) { @@ -944,6 +1016,8 @@ sub command17 { # authenticated server sub command18 { + return; + # This sub disabled by tassium - it has been replaced with smtp_auth_mech print "Do you wish to use an authenticated SMTP server? Your server must\n"; print "support this in order for SquirrelMail to work with it. We implemented\n"; print "it according to RFC 2554.\n"; @@ -1043,6 +1117,193 @@ sub command111 { } return $new_optional_delimiter; } +# IMAP authentication type +# Possible values: plain, cram-md5, digest-md5 +# Now offers to detect supported mechs, assuming server & port are set correctly + +sub command112a { + print "If you have already set the hostname and port number, I can try to\n"; + print "detect the mechanisms your IMAP server supports.\n"; + print "I will try to detect CRAM-MD5 and DIGEST-MD5 support. I can't test\n"; + print "for \"plain\" without knowing a username and password.\n"; + print "Auto-detecting is optional - you can safely say \"n\" here.\n"; + print "\nTry to detect supported mechanisms? [y/N]: "; + $inval=; + chomp($inval); + if ($inval =~ /^y\b/i) { + # Yes, let's try to detect. + print "Trying to detect IMAP capabilities...\n"; + my $host = $imapServerAddress . ':'. $imapPort; + print "CRAM-MD5:\t"; + my $tmp = detect_auth_support('IMAP',$host,'CRAM-MD5'); + if (defined($tmp)) { + if ($tmp eq 'YES') { + print "$WHT SUPPORTED$NRM\n"; + } else { + print "$WHT NOT SUPPORTED$NRM\n"; + } + } else { + print $WHT . " ERROR DETECTING$NRM\n"; + } + + print "DIGEST-MD5:\t"; + $tmp = detect_auth_support('IMAP',$host,'DIGEST-MD5'); + if (defined($tmp)) { + if ($tmp eq 'YES') { + print "$WHT SUPPORTED$NRM\n"; + } else { + print "$WHT NOT SUPPORTED$NRM\n"; + } + } else { + print $WHT . " ERROR DETECTING$NRM\n"; + } + + } + print "\nWhat authentication mechanism do you want to use for IMAP connections?\n\n"; + print $WHT . "plain" . $NRM . " - Plaintext. If you can do better, you probably should.\n"; + print $WHT . "cram-md5" . $NRM . " - Slightly better than plaintext.\n"; + print $WHT . "digest-md5" . $NRM . " - Privacy protection - better than cram-md5.\n"; + print "\n*** YOUR IMAP SERVER MUST SUPPORT THE MECHANISM YOU CHOOSE HERE ***\n"; + print "If you don't understand or are unsure, you probably want \"plain\"\n\n"; + print "plain, cram-md5, or digest-md5 [$WHT$imap_auth_mech$NRM]: $WHT"; + $inval=; + chomp($inval); + if ( ($inval =~ /^cram-md5\b/i) || ($inval =~ /^digest-md5\b/i) || ($inval =~ /^plain\b/i)) { + return lc($inval); + } else { + # user entered garbage or default value so nothing needs to be set + return $imap_auth_mech; + } +} + + +# SMTP authentication type +# Possible choices: none, plain, cram-md5, digest-md5 +sub command112b { + print "If you have already set the hostname and port number, I can try to\n"; + print "automatically detect the mechanisms your SMTP server supports.\n"; + print "Auto-detection is *optional* - you can safely say \"n\" here.\n"; + print "\nTry to detect auth mechanisms? [y/N]: "; + $inval=; + chomp($inval); + if ($inval =~ /^y\b/i) { + # Yes, let's try to detect. + print "Trying to detect supported methods (SMTP)...\n"; + + # Special case! + # Check none by trying to relay to junk@birdbrained.org + $host = $smtpServerAddress . ':' . $smtpPort; + use IO::Socket; + my $sock = IO::Socket::INET->new($host); + print "Testing none:\t\t$WHT"; + if (!defined($sock)) { + print " ERROR TESTING\n"; + close $sock; + } else { + print $sock "mail from: tester\@squirrelmail.org\n"; + $got = <$sock>; # Discard + print $sock "rcpt to: junk\@birdbrained.org\n"; + $got = <$sock>; # This is the important line + if ($got =~ /^250\b/) { # SMTP will relay without auth + print "SUPPORTED$NRM\n"; + } else { + print "NOT SUPPORTED$NRM\n"; + } + print $sock "rset\n"; + print $sock "quit\n"; + close $sock; + } + # Try plain (SquirrelMail default) + print "Testing plain:\t\t"; + $tmp=detect_auth_support('SMTP',$host,'LOGIN'); + if (defined($tmp)) { + if ($tmp eq 'YES') { + print $WHT . "SUPPORTED$NRM\n"; + } else { + print $WHT . "NOT SUPPORTED$NRM\n"; + } + } else { + print $WHT . "ERROR DETECTING$NRM\n"; + } + + # Try CRAM-MD5 + print "Testing CRAM-MD5:\t"; + $tmp=detect_auth_support('SMTP',$host,'CRAM-MD5'); + if (defined($tmp)) { + if ($tmp eq 'YES') { + print $WHT . "SUPPORTED$NRM\n"; + } else { + print $WHT . "NOT SUPPORTED$NRM\n"; + } + } else { + print $WHT . "ERROR DETECTING$NRM\n"; + } + + + print "Testing DIGEST-MD5:\t"; + $tmp=detect_auth_support('SMTP',$host,'DIGEST-MD5'); + if (defined($tmp)) { + if ($tmp eq 'YES') { + print $WHT . "SUPPORTED$NRM\n"; + } else { + print $WHT . "NOT SUPPORTED$NRM\n"; + } + } else { + print $WHT . "ERROR DETECTING$NRM\n"; + } + } + print "\tWhat authentication mechanism do you want to use for SMTP connections?\n"; + print $WHT . "none" . $NRM . " - Your SMTP server does not require authorization.\n"; + print $WHT . "plain" . $NRM . " - Plaintext. If you can do better, you probably should.\n"; + print $WHT . "cram-md5" . $NRM . " - Slightly better than plaintext.\n"; + print $WHT . "digest-md5" . $NRM . " - Privacy protection - better than cram-md5.\n"; + print "\n*** YOUR SMTP SERVER MUST SUPPORT THE MECHANISM YOU CHOOSE HERE ***\n"; + print "If you don't understand or are unsure, you probably want \"none\"\n\n"; + print "none, plain, cram-md5, or digest-md5 [$WHT$smtp_auth_mech$NRM]: $WHT"; + $inval=; + chomp($inval); + if ($inval =~ /^none\b/i) { + # SMTP doesn't necessarily require logins + return "none"; + } + if ( ($inval =~ /^cram-md5\b/i) || ($inval =~ /^digest-md5\b/i) || + ($inval =~ /^plain\b/i)) { + return lc($inval); + } else { + # user entered garbage, or default value so nothing needs to be set + return $smtp_auth_mech; + } +} + +# TLS +# This sub is reused for IMAP and SMTP +# Args: service name, default value +sub command113 { + my($default_val,$service,$inval); + $service=$_[0]; + $default_val=$_[1]; + print "TLS (Transport Layer Security) encrypts the traffic between server and client.\n"; + print "If you're familiar with SSL, you get the idea.\n"; + print "To use this feature, your " . $service . " server must offer TLS\n"; + print "capability, plus PHP 4.3.x with OpenSSL support.\n"; + print "\nIf your " . $service . " server is localhost, you can safely disable this.\n"; + print "If it is remote, you may wish to seriously consider enabling this.\n"; + print "Enable TLS (y/n) [$WHT"; + if ($default_val eq "true") { + print "y"; + } else { + print "n"; + } + print "$NRM]: $WHT"; + $inval=; + $inval =~ tr/yn//cd; + return "true" if ( $inval eq "y" ); + return "false" if ( $inval eq "n" ); + return $default_val; + + +} + # MOTD sub command71 { @@ -1860,6 +2121,20 @@ sub command315 { return $uid_support; } +sub command316 { + print "This option allows you to change the name of the PHP session used\n"; + print "by SquirrelMail. Unless you know what you are doing, you probably\n"; + print "don't need or want to change this from the default of SQMSESSID.\n"; + print "[$WHT$session_name$NRM]: $WHT"; + $new_session_name = ; + chomp($new_session_name); + if ( $new_session_name eq "" ) { + $new_session_name = $session_name; + } + return $new_session_name; +} + + sub command41 { print "\nNow we will define the themes that you wish to use. If you have added\n"; @@ -2374,7 +2649,7 @@ sub save_data { # string print CF "\$sendmail_path = '$sendmail_path';\n"; # boolean - print CF "\$use_authenticated_smtp = $use_authenticated_smtp;\n"; +# print CF "\$use_authenticated_smtp = $use_authenticated_smtp;\n"; # boolean print CF "\$pop_before_smtp = $pop_before_smtp;\n"; # string @@ -2525,21 +2800,32 @@ sub save_data { # string print CF "\$prefs_val_field = '$prefs_val_field';\n"; # boolean - print CF "\$no_list_for_subscribe = $no_list_for_subscribe;\n"; - print CF "\n"; - - print CF "/**\n"; - print CF " * Make sure there are no characters after the PHP closing\n"; - print CF " * tag below (including newline characters and whitespace).\n"; - print CF " * Otherwise, that character will cause the headers to be\n"; - print CF " * sent and regular output to begin, which will majorly screw\n"; - print CF " * things up when we try to send more headers later.\n"; - print CF " */\n"; - print CF "?>"; - - close CF; + print CF "\$no_list_for_subscribe = $no_list_for_subscribe;\n"; - print "Data saved in config.php\n"; + # string + print CF "\$smtp_auth_mech = '$smtp_auth_mech';\n"; + print CF "\$imap_auth_mech = '$imap_auth_mech';\n"; + # boolean + print CF "\$use_imap_tls = $use_imap_tls;\n"; + print CF "\$use_smtp_tls = $use_smtp_tls;\n"; + + print CF "\$session_name = '$session_name';\n"; + + print CF "\n"; + print CF "\@include SM_PATH . 'config/config_local.php';\n"; + + print CF "\n/**\n"; + print CF " * Make sure there are no characters after the PHP closing\n"; + print CF " * tag below (including newline characters and whitespace).\n"; + print CF " * Otherwise, that character will cause the headers to be\n"; + print CF " * sent and regular output to begin, which will majorly screw\n"; + print CF " * things up when we try to send more headers later.\n"; + print CF " */\n"; + print CF "?>"; + + close CF; + + print "Data saved in config.php\n"; } else { print "Error saving config.php: $!\n"; } @@ -2682,6 +2968,7 @@ sub change_to_SM_path() { # If the path is absolute, don't bother. return "\'" . $old_path . "\'" if ( $old_path eq ''); return "\'" . $old_path . "\'" if ( $old_path =~ /^\// ); + return $old_path if ( $old_path =~ /^\$/); return $old_path if ( $old_path =~ /^SM_PATH/ ); # For relative paths, split on '../' @@ -2719,6 +3006,7 @@ sub change_to_rel_path() { my $new_path = ''; return $old_path if ( $old_path eq ''); + return $old_path if ( $old_path =~ /^\$/ ); return $old_path if ( $old_path =~ /^\// ); return $old_path if ( $old_path =~ /^\.\./ ); @@ -2729,3 +3017,71 @@ sub change_to_rel_path() { return $new_path; } + +sub detect_auth_support { +# Attempts to auto-detect if a specific auth mechanism is supported. +# Called by 'command112a' and 'command112b' +# ARGS: service-name (IMAP or SMTP), host:port, mech-name (ie. CRAM-MD5) + + # Misc setup + use IO::Socket; + my $service = shift; + my $host = shift; + my $mech = shift; + # Sanity checks + if ((!defined($service)) or (!defined($host)) or (!defined($mech))) { + # Error - wrong # of args + print "BAD ARGS!\n"; + return undef; + } + + if ($service eq 'SMTP') { + $cmd = "AUTH $mech\n"; + $logout = "QUIT\n"; + } elsif ($service eq 'IMAP') { + $cmd = "A01 AUTHENTICATE $mech\n"; + $logout = "C01 LOGOUT\n"; + } else { + # unknown service - whoops. + return undef; + } + + # Get this show on the road + my $sock=IO::Socket::INET->new($host); + if (!defined($sock)) { + # Connect failed + return undef; + } + my $discard = <$sock>; # Server greeting/banner - who cares.. + print $sock $cmd; + + my $response = <$sock>; + if (!defined($response)) { + return undef; + } + + # So at this point, we have a response, and it is (hopefully) valid. + if ($service eq 'SMTP') { + if (($response =~ /^535/) or ($response =~/^502/)) { + # Not supported + close $sock; + return 'NO'; + } + } elsif ($service eq 'IMAP') { + if ($response =~ /^A01/) { + # Not supported + close $sock; + return 'NO'; + } + } else { + # Unknown service - this shouldn't be able to happen. + close $sock; + return undef; + } + + # If it gets here, the mech is supported + print $sock "*\n"; # Attempt to cancel authentication + print $sock $logout; # Try to log out, but we don't really care if this fails + close $sock; + return 'YES'; +}