function spam_login_filter_check_spammer($register_email, $register_ip, $checkemail = true)
{
$spammer = false;
if ($checkemail) {
$email_whitelisted = spam_login_filter_is_email_whitelisted($register_email);
} else {
$email_whitelisted = true;
}
$ip_whitelisted = spam_login_filter_is_ip_whitelisted($register_ip);
if ($email_whitelisted && $ip_whitelisted) {
// short circuit
return true;
}
//Mail domain blacklist
if (elgg_get_plugin_setting('use_mail_domain_blacklist', 'spam_login_filter') == "yes" && !$email_whitelisted) {
$blacklistedMailDomains = preg_split('/\\s+/', spam_login_filter_custom_strip_tags(elgg_get_plugin_setting('blacklisted_mail_domains', 'spam_login_filter')), -1, PREG_SPLIT_NO_EMPTY);
$mailDomain = explode("@", $register_email);
foreach ($blacklistedMailDomains as $domain) {
if ($mailDomain[1] == $domain) {
register_error(elgg_echo('spam_login_filter:access_denied_domain_blacklist'));
spam_login_filter_notify_admin($register_email, $register_ip, "Internal domain blacklist");
$spammer = true;
break;
}
}
}
if (!$spammer) {
//Mail blacklist
if (elgg_get_plugin_setting('use_mail_blacklist', 'spam_login_filter') == "yes" && !$email_whitelisted) {
$blacklistedMails = preg_split('/\\s+/', spam_login_filter_custom_strip_tags(elgg_get_plugin_setting('blacklisted_mails', 'spam_login_filter')), -1, PREG_SPLIT_NO_EMPTY);
foreach ($blacklistedMails as $blacklistedMail) {
if ($blacklistedMail == $register_email) {
register_error(elgg_echo('spam_login_filter:access_denied_mail_blacklist'));
spam_login_filter_notify_admin($register_email, $register_ip, "Internal e-mail blacklist");
$spammer = true;
break;
}
}
}
}
if (!$spammer) {
//StopForumSpam
if (elgg_get_plugin_setting('use_stopforumspam', 'spam_login_filter') == "yes") {
//check the e-mail adress
$url = "http://www.stopforumspam.com/api?email=" . $register_email . "&f=serial";
$return = spam_login_filter_file_get_conditional_contents($url);
if ($return != false) {
$data = unserialize($return);
$email_frequency = $data['email']['frequency'];
if ($email_frequency != '0' && !$email_whitelisted) {
register_error(elgg_echo('spam_login_filter:access_denied_mail_blacklist'));
spam_login_filter_notify_admin($register_email, $register_ip, "Stopforumspam e-mail blacklist");
$spammer = true;
}
}
if (!$spammer && !$ip_whitelisted) {
//e-mail not found in the database, now check the ip
$url = "http://www.stopforumspam.com/api?ip=" . $register_ip . "&f=serial";
$return = spam_login_filter_file_get_conditional_contents($url);
if ($return != false) {
$data = unserialize($return);
$ip_frequency = $data['ip']['frequency'];
if ($ip_frequency != '0') {
register_error(elgg_echo('spam_login_filter:access_denied_ip_blacklist'));
spam_login_filter_notify_admin($register_email, $register_ip, "Stopforumspam IP blacklist");
$spammer = true;
}
}
}
}
}
if (!$spammer) {
//Fassim
if (elgg_get_plugin_setting('use_fassim', 'spam_login_filter') == "yes") {
$fassim_api_key = elgg_get_plugin_setting('fassim_api_key', 'spam_login_filter');
$fassim_check_email = elgg_get_plugin_setting('fassim_check_email', 'spam_login_filter');
$fassim_check_ip = elgg_get_plugin_setting('fassim_check_ip', 'spam_login_filter');
$fassim_block_proxies = elgg_get_plugin_setting('fassim_block_proxies', 'spam_login_filter');
$fassim_block_top_spamming_isps = elgg_get_plugin_setting('fassim_block_top_spamming_isps', 'spam_login_filter');
$fassim_block_top_spamming_domains = elgg_get_plugin_setting('fassim_block_top_spamming_domains', 'spam_login_filter');
$fassim_blocked_country_list = elgg_get_plugin_setting('fassim_blocked_country_list', 'spam_login_filter');
$fassim_blocked_region_list = elgg_get_plugin_setting('fassim_blocked_region_list', 'spam_login_filter');
if (!empty($fassim_api_key) && preg_match('/^[0-9a-z]{8}(-[0-9a-z]{4}){3}-[0-9a-z]{12}$/i', $fassim_api_key)) {
$url = 'http://api.fassim.com/regcheck.php?apikey=' . $fassim_api_key . '&email=' . $register_email . "&ip=" . $register_ip . '&proxy=' . $fassim_block_proxies . '&topisp=' . $fassim_block_top_spamming_isps . '&topdm=' . $fassim_block_top_spamming_domains . '&cc=' . $fassim_blocked_country_list . '®ion=' . $fassim_blocked_region_list . '&hostForumVersion=ELGG';
$return = spam_login_filter_file_get_conditional_contents($url);
if ($return != false) {
$results = json_decode($return);
if ($results != NULL) {
if ($fassim_check_email == 1 && isset($results->email_status) && $results->email_status == true) {
if (!$email_whitelisted) {
register_error(elgg_echo('spam_login_filter:access_denied_mail_blacklist'));
spam_login_filter_notify_admin($register_email, $register_ip, "Fassim e-mail blacklist");
$spammer = true;
}
}
if ($fassim_check_ip == 1 && isset($results->ip_status) && $results->ip_status == true) {
if (!$ip_whitelisted) {
register_error(elgg_echo('spam_login_filter:access_denied_ip_blacklist'));
spam_login_filter_notify_admin($register_email, $register_ip, "Fassim IP blacklist");
$spammer = true;
}
}
if ($fassim_block_proxies == 1 && isset($results->proxy) && $results->proxy == true) {
register_error(elgg_echo('spam_login_filter:access_denied_ip_blacklist'));
spam_login_filter_notify_admin($register_email, $register_ip, "Fassim proxy blacklist");
$spammer = true;
}
if ($fassim_block_top_spamming_isps == 1 && isset($results->top_isp) && $results->top_isp == true) {
register_error(elgg_echo('spam_login_filter:access_denied_ip_blacklist'));
spam_login_filter_notify_admin($register_email, $register_ip, "Fassim top ISP blacklist");
$spammer = true;
}
if ($fassim_block_top_spamming_domains == 1 && isset($results->top_domain) && $results->top_domain == true) {
register_error(elgg_echo('spam_login_filter:access_denied_domain_blacklist'));
spam_login_filter_notify_admin($register_email, $register_ip, "Fassim top domains blacklist");
$spammer = true;
}
if (!empty($fassim_blocked_country_list) && isset($results->country_match) && $results->country_match == true) {
register_error(elgg_echo('spam_login_filter:access_denied_country_blacklist'));
spam_login_filter_notify_admin($register_email, $register_ip, "Fassim country blacklist");
$spammer = true;
}
if (!empty($fassim_blocked_region_list) && isset($results->region) && $results->region == true) {
register_error(elgg_echo('spam_login_filter:access_denied_region_blacklist'));
spam_login_filter_notify_admin($register_email, $register_ip, "Fassim region blacklist");
$spammer = true;
}
}
}
}
}
}
return !$spammer;
}
function spam_login_filter_login_event($event, $type, $user)
{
$check_login = elgg_get_plugin_setting('event_login', 'spam_login_filter');
if ($check_login != 'no') {
// do it by default
if (!spam_login_filter_check_spammer($user->email, spam_login_filter_get_ip(), true)) {
register_error(elgg_echo('spam_login_filter:access_denied_mail_blacklist'));
spam_login_filter_notify_admin($user->email, $register_ip, "Existing member identified as spammer has tried to login, check this account");
return false;
}
}
// check user metadata for banned words/phrases
$banned = spam_login_filter_get_banned_strings();
$metadata = spam_login_filter_get_user_metadata();
if ($banned && $metadata) {
foreach ($metadata as $m) {
foreach ($banned as $str) {
if (strpos($user->{$m}, $str) !== false) {
return false;
}
}
}
}
}
