diff options
Diffstat (limited to 'lib/phplib/email_validation.php')
| -rw-r--r-- | lib/phplib/email_validation.php | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/lib/phplib/email_validation.php b/lib/phplib/email_validation.php new file mode 100644 index 0000000..f825e82 --- /dev/null +++ b/lib/phplib/email_validation.php @@ -0,0 +1,271 @@ +<?php +/* + * email_validation.php + * + * @(#) $Header$ + * + */ + +class email_validation_class +{ + var $username_regular_expression=null; + var $password_regular_expression="/^.{8,}\$/"; + var $name_regular_expression='/^[_ a-zA-ZÀ-ÿ\'-]+$/'; + var $telefon_regular_expression="/^([0-9 \(\)\\/+_-]*)\$/"; + var $timeout=10; + var $data_timeout=10; + var $localhost="studip.de"; + var $localuser="info"; + var $debug=0; + var $html_debug=0; + var $exclude_address=""; + var $getmxrr="GetMXRR"; + + var $next_token=""; + + private $idna_convert; + + function __construct() + { + $this->username_regular_expression = Config::get()->USERNAME_REGULAR_EXPRESSION; + $this->idna_convert = new Algo26\IdnaConvert\ToIdn(); + } + + Function Tokenize($string,$separator="") + { + if(!strcmp($separator,"")) + { + $separator=$string; + $string=$this->next_token; + } + for($character=0;$character<mb_strlen($separator);$character++) + { + if(GetType($position=mb_strpos($string,$separator[$character]))=="integer") + $found=(IsSet($found) ? min($found,$position) : $position); + } + if(IsSet($found)) + { + $this->next_token=mb_substr($string,$found+1); + return(mb_substr($string,0,$found)); + } + else + { + $this->next_token=""; + return($string); + } + } + + Function OutputDebug($message) + { + $message.="\n"; + if($this->html_debug) + $message=str_replace("\n","<br>\n",HtmlEntities($message)); + echo $message; + flush(); + } + + Function GetLine($connection) + { + for($line="";;) + { + if(feof($connection)) + return(0); + $line.=fgets($connection,100); + $length=mb_strlen($line); + if($length>=2 + && mb_substr($line,$length-2,2)=="\r\n") + { + $line=mb_substr($line,0,$length-2); + if($this->debug) + $this->OutputDebug("S $line"); + return($line); + } + } + } + + Function PutLine($connection,$line) + { + if($this->debug) + $this->OutputDebug("C $line"); + return(fputs($connection,"$line\r\n")); + } + + Function ValidateUsername($username) + { + return(mb_strtolower($username) != 'studip' && preg_match($this->username_regular_expression,$username)!=0); + } + + Function ValidatePassword($password) + { + return preg_match($this->password_regular_expression, $password) != 0; + } + + Function ValidateName($name) + { + return(preg_match($this->name_regular_expression,$name)!=0); + } + + Function ValidateTelefon($telefon) + { + return(preg_match($this->telefon_regular_expression,$telefon)!=0); + } + + /** + * Validates an email adress. If you pass a comma separated list of domains + * as the second parameter, the email is also validated against this list + * of domains and the email is only valid if it matches any of the domains. + * + * @param string $email Email adress to validate + * @param string $domains Optional comma separated list of valid domains + * @return bool + */ + public function ValidateEmailAddress($email, $domains = '') + { + $converted_email = $this->idna_convert->convertEmailAddress($email); + if (!filter_var($converted_email, FILTER_VALIDATE_EMAIL)) { + return false; + } + + if (!$domains) { + return true; + } + + $checks = []; + foreach (explode(',', $domains) as $domain) { + $checks[] = preg_quote('@' . trim($domain), '/'); + } + + $regexp = '/' . implode('|', $checks) . '$/i'; + return preg_match($regexp, $email) > 0; + } + + Function ValidateEmailHost($email){ + return $this->ValidateEmailHostIntern($email, $hosts); + } + + Function ValidateEmailHostIntern($email,&$hosts) + { + if (!$GLOBALS['MAIL_VALIDATE_HOST']){ + return true; + } + if(!$this->ValidateEmailAddress($email)) + return(0); + $user=$this->Tokenize($email,"@"); + $domain=$this->Tokenize(""); + $hosts=$weights=[]; + $getmxrr=$this->getmxrr; + if(function_exists($getmxrr) + && $getmxrr($domain,$hosts,$weights)) + { + $mxhosts=[]; + for($host=0;$host<count($hosts);$host++) + $mxhosts[$weights[$host]]=$hosts[$host]; + KSort($mxhosts); + for(Reset($mxhosts),$host=0;$host<count($mxhosts);Next($mxhosts),$host++) + $hosts[$host]=$mxhosts[Key($mxhosts)]; + } + else + { + if(strcmp($ip=@gethostbyname($domain),$domain) + && (mb_strlen($this->exclude_address)==0 + || strcmp(@gethostbyname($this->exclude_address),$ip))) + $hosts[]=$domain; + } + return(count($hosts)!=0); + } + + Function VerifyResultLines($connection,$code) + { + while(($line=$this->GetLine($connection))) + { + if(!strcmp($this->Tokenize($line," "),$code)) + return(1); + if(strcmp($this->Tokenize($line,"-"),$code)) + return(0); + } + return(-1); + } + + Function ValidateEmailBox($email) + { + if (!$GLOBALS['MAIL_VALIDATE_BOX']){ + return true; + } + if(!$this->ValidateEmailHostIntern($email,$hosts)) + return(0); + if(!strcmp($localhost=$this->localhost,"") + && !strcmp($localhost=getenv("SERVER_NAME"),"") + && !strcmp($localhost=getenv("HOST"),"")) + $localhost="localhost"; + if(!strcmp($localuser=$this->localuser,"") + && !strcmp($localuser=getenv("USERNAME"),"") + && !strcmp($localuser=getenv("USER"),"")) + $localuser="root"; + for($host=0;$host<count($hosts);$host++) + { + $domain=$hosts[$host]; + if(preg_match('/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/',$domain)) + $ip=$domain; + else + { + if($this->debug) + $this->OutputDebug("Resolving host name \"".$hosts[$host]."\"..."); + if(!strcmp($ip=@gethostbyname($domain),$domain)) + { + if($this->debug) + $this->OutputDebug("Could not resolve host name \"".$hosts[$host]."\"."); + continue; + } + } + if(mb_strlen($this->exclude_address) + && !strcmp(@gethostbyname($this->exclude_address),$ip)) + { + if($this->debug) + $this->OutputDebug("Host address of \"".$hosts[$host]."\" is the exclude address"); + continue; + } + if($this->debug) + $this->OutputDebug("Connecting to host address \"".$ip."\"..."); + if(($connection=($this->timeout ? @fsockopen($ip,25,$errno,$error,$this->timeout) : @fsockopen($ip,25)))) + { + $timeout=($this->data_timeout ? $this->data_timeout : $this->timeout); + if($timeout + && function_exists("socket_set_timeout")) + socket_set_timeout($connection,$timeout,0); + if($this->debug) + $this->OutputDebug("Connected."); + if($this->VerifyResultLines($connection,"220")>0 + && $this->PutLine($connection,"HELO $localhost") + && $this->VerifyResultLines($connection,"250")>0 + && $this->PutLine($connection,"MAIL FROM: <$localuser@$localhost>") + && $this->VerifyResultLines($connection,"250")>0 + && $this->PutLine($connection,"RCPT TO: <$email>") + && ($result=$this->VerifyResultLines($connection,"250"))>=0) + { + if($result + && $this->PutLine($connection,"DATA")) + $result=($this->VerifyResultLines($connection,"354")!=0); + if($this->debug) + $this->OutputDebug("This host states that the address is ".($result ? "" : "not ")."valid."); + fclose($connection); + if($this->debug) + $this->OutputDebug("Disconnected."); + return($result); + } + if($this->debug) + $this->OutputDebug("Unable to validate the address with this host."); + fclose($connection); + if($this->debug) + $this->OutputDebug("Disconnected."); + } + else + { + if($this->debug) + $this->OutputDebug("Failed."); + } + } + return(-1); + } +}; + +?> |