mirror of https://github.com/MISP/MISP
670 lines
27 KiB
PHP
670 lines
27 KiB
PHP
<?php
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class AttributeValidationTool
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{
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const HEX_HAS_LENGTHS = array(
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'authentihash' => 64,
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'md5' => 32,
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'imphash' => 32,
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'telfhash' => 70,
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'sha1' => 40,
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'git-commit-id' => 40,
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'x509-fingerprint-md5' => 32,
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'x509-fingerprint-sha1' => 40,
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'x509-fingerprint-sha256' => 64,
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'ja3-fingerprint-md5' => 32,
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'jarm-fingerprint' => 62,
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'hassh-md5' => 32,
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'hasshserver-md5' => 32,
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'pehash' => 40,
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'sha224' => 56,
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'sha256' => 64,
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'sha384' => 96,
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'sha512' => 128,
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'sha512/224' => 56,
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'sha512/256' => 64,
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'sha3-224' => 56,
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'sha3-256' => 64,
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'sha3-384' => 96,
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'sha3-512' => 128
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);
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// do some last second modifications before the validation
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public static function modifyBeforeValidation($type, $value)
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{
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$value = self::handle4ByteUnicode($value);
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switch ($type) {
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case 'md5':
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case 'sha1':
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case 'sha224':
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case 'sha256':
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case 'sha384':
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case 'sha512':
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case 'sha512/224':
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case 'sha512/256':
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case 'sha3-224':
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case 'sha3-256':
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case 'sha3-384':
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case 'sha3-512':
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case 'ja3-fingerprint-md5':
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case 'jarm-fingerprint':
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case 'hassh-md5':
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case 'hasshserver-md5':
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case 'hostname':
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case 'pehash':
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case 'authentihash':
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case 'vhash':
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case 'imphash':
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case 'telfhash':
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case 'tlsh':
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case 'anonymised':
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case 'cdhash':
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case 'email':
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case 'email-src':
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case 'email-dst':
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case 'target-email':
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case 'whois-registrant-email':
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$value = strtolower($value);
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break;
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case 'domain':
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$value = strtolower($value);
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$value = trim($value, '.');
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// Domain is not valid, try to convert to punycode
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if (!self::isDomainValid($value) && function_exists('idn_to_ascii')) {
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$punyCode = idn_to_ascii($value);
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if ($punyCode !== false) {
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$value = $punyCode;
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}
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}
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break;
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case 'domain|ip':
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$value = strtolower($value);
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$parts = explode('|', $value);
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if (!isset($parts[1])) {
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return $value; // not a composite
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}
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$parts[0] = trim($parts[0], '.');
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// Domain is not valid, try to convert to punycode
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if (!self::isDomainValid($parts[0]) && function_exists('idn_to_ascii')) {
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$punyCode = idn_to_ascii($parts[0]);
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if ($punyCode !== false) {
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$parts[0] = $punyCode;
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}
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}
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if (filter_var($parts[1], FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
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// convert IPv6 address to compressed format
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$parts[1] = inet_ntop(inet_pton($parts[1]));
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}
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return "$parts[0]|$parts[1]";
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case 'filename|md5':
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case 'filename|sha1':
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case 'filename|imphash':
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case 'filename|sha224':
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case 'filename|sha256':
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case 'filename|sha384':
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case 'filename|sha512':
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case 'filename|sha512/224':
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case 'filename|sha512/256':
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case 'filename|sha3-224':
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case 'filename|sha3-256':
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case 'filename|sha3-384':
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case 'filename|sha3-512':
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case 'filename|authentihash':
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case 'filename|vhash':
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case 'filename|pehash':
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case 'filename|tlsh':
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$pieces = explode('|', $value);
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$value = $pieces[0] . '|' . strtolower($pieces[1]);
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break;
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case 'http-method':
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case 'hex':
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return strtoupper($value);
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case 'vulnerability':
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case 'weakness':
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$value = str_replace('–', '-', $value);
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return strtoupper($value);
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case 'cc-number':
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case 'bin':
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$value = preg_replace('/[^0-9]+/', '', $value);
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break;
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case 'iban':
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case 'bic':
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$value = strtoupper($value);
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$value = preg_replace('/[^0-9A-Z]+/', '', $value);
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break;
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case 'prtn':
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case 'whois-registrant-phone':
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case 'phone-number':
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if (substr($value, 0, 2) == '00') {
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$value = '+' . substr($value, 2);
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}
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$value = preg_replace('/\(0\)/', '', $value);
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$value = preg_replace('/[^\+0-9]+/', '', $value);
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break;
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case 'x509-fingerprint-md5':
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case 'x509-fingerprint-sha256':
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case 'x509-fingerprint-sha1':
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$value = str_replace(':', '', $value);
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$value = strtolower($value);
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break;
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case 'ip-src':
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case 'ip-dst':
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if (filter_var($value, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
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// convert IPv6 address to compressed format
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$value = inet_ntop(inet_pton($value));
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}
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break;
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case 'ip-dst|port':
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case 'ip-src|port':
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if (substr_count($value, ':') >= 2) { // (ipv6|port) - tokenize ip and port
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if (strpos($value, '|')) { // 2001:db8::1|80
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$parts = explode('|', $value);
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} elseif (strpos($value, '[') === 0 && strpos($value, ']') !== false) { // [2001:db8::1]:80
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$ipv6 = substr($value, 1, strpos($value, ']')-1);
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$port = explode(':', substr($value, strpos($value, ']')))[1];
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$parts = array($ipv6, $port);
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} elseif (strpos($value, '.')) { // 2001:db8::1.80
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$parts = explode('.', $value);
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} elseif (strpos($value, ' port ')) { // 2001:db8::1 port 80
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$parts = explode(' port ', $value);
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} elseif (strpos($value, 'p')) { // 2001:db8::1p80
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$parts = explode('p', $value);
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} elseif (strpos($value, '#')) { // 2001:db8::1#80
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$parts = explode('#', $value);
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} else { // 2001:db8::1:80 this one is ambiguous
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$temp = explode(':', $value);
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$parts = array(implode(':', array_slice($temp, 0, count($temp)-1)), end($temp));
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}
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} elseif (strpos($value, ':')) { // (ipv4:port)
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$parts = explode(':', $value);
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} elseif (strpos($value, '|')) { // (ipv4|port)
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$parts = explode('|', $value);
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} else {
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return $value;
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}
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if (filter_var($parts[0], FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
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// convert IPv6 address to compressed format
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$parts[0] = inet_ntop(inet_pton($parts[0]));
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}
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return $parts[0] . '|' . $parts[1];
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case 'mac-address':
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case 'mac-eui-64':
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$value = str_replace(array('.', ':', '-', ' '), '', strtolower($value));
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$value = wordwrap($value, 2, ':', true);
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break;
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case 'hostname|port':
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$value = strtolower($value);
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return str_replace(':', '|', $value);
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case 'boolean':
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if ('true' == trim(strtolower($value))) {
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$value = 1;
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}
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if ('false' == trim(strtolower($value))) {
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$value = 0;
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}
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$value = ($value) ? '1' : '0';
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break;
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case 'datetime':
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try {
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$value = (new DateTime($value, new DateTimeZone('GMT')))->format('Y-m-d\TH:i:s.uO'); // ISO8601 formating with microseconds
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} catch (Exception $e) {
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// silently skip. Rejection will be done in runValidation()
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}
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break;
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case 'AS':
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if (strtoupper(substr($value, 0, 2)) === 'AS') {
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$value = substr($value, 2); // remove 'AS'
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}
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if (strpos($value, '.') !== false) { // maybe value is in asdot notation
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$parts = explode('.', $value);
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if (self::isPositiveInteger($parts[0]) && self::isPositiveInteger($parts[1])) {
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return $parts[0] * 65536 + $parts[1];
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}
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}
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break;
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}
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return $value;
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}
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public static function runValidation($value, $type)
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{
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// check data validation
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switch ($type) {
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case 'md5':
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case 'imphash':
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case 'telfhash':
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case 'sha1':
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case 'sha224':
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case 'sha256':
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case 'sha384':
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case 'sha512':
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case 'sha512/224':
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case 'sha512/256':
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case 'sha3-224':
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case 'sha3-256':
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case 'sha3-384':
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case 'sha3-512':
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case 'authentihash':
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case 'ja3-fingerprint-md5':
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case 'jarm-fingerprint':
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case 'hassh-md5':
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case 'hasshserver-md5':
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case 'x509-fingerprint-md5':
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case 'x509-fingerprint-sha256':
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case 'x509-fingerprint-sha1':
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case 'git-commit-id':
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if (self::isHashValid($type, $value)) {
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return true;
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}
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$length = self::HEX_HAS_LENGTHS[$type];
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return __('Checksum has an invalid length or format (expected: %s hexadecimal characters). Please double check the value or select type "other".', $length);
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case 'tlsh':
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if (preg_match("#^t?[0-9a-f]{35,}$#i", $value)) {
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return true;
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}
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return __('Checksum has an invalid length or format (expected: at least 35 hexadecimal characters, optionally starting with t1 instead of hexadecimal characters). Please double check the value or select type "other".');
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case 'pehash':
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if (self::isHashValid('pehash', $value)) {
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return true;
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}
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return __('The input doesn\'t match the expected sha1 format (expected: 40 hexadecimal characters). Keep in mind that MISP currently only supports SHA1 for PEhashes, if you would like to get the support extended to other hash types, make sure to create a github ticket about it at https://github.com/MISP/MISP!');
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case 'ssdeep':
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if (substr_count($value, ':') === 2) {
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$parts = explode(':', $value);
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if (self::isPositiveInteger($parts[0])) {
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return true;
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}
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}
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return __('Invalid SSDeep hash. The format has to be blocksize:hash:hash');
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case 'impfuzzy':
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if (substr_count($value, ':') === 2) {
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$parts = explode(':', $value);
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if (self::isPositiveInteger($parts[0])) {
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return true;
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}
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}
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return __('Invalid impfuzzy format. The format has to be imports:hash:hash');
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case 'cdhash':
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if (preg_match("#^[0-9a-f]{40,}$#", $value)) {
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return true;
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}
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return __('The input doesn\'t match the expected format (expected: 40 or more hexadecimal characters)');
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case 'http-method':
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if (preg_match("#(OPTIONS|GET|HEAD|POST|PUT|DELETE|TRACE|CONNECT|PROPFIND|PROPPATCH|MKCOL|COPY|MOVE|LOCK|UNLOCK|VERSION-CONTROL|REPORT|CHECKOUT|CHECKIN|UNCHECKOUT|MKWORKSPACE|UPDATE|LABEL|MERGE|BASELINE-CONTROL|MKACTIVITY|ORDERPATCH|ACL|PATCH|SEARCH)#", $value)) {
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return true;
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}
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return __('Unknown HTTP method.');
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case 'filename|pehash':
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// no newline
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if (preg_match("#^.+\|[0-9a-f]{40}$#", $value)) {
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return true;
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}
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return __('The input doesn\'t match the expected filename|sha1 format (expected: filename|40 hexadecimal characters). Keep in mind that MISP currently only supports SHA1 for PEhashes, if you would like to get the support extended to other hash types, make sure to create a github ticket about it at https://github.com/MISP/MISP!');
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case 'filename|md5':
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case 'filename|sha1':
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case 'filename|imphash':
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case 'filename|sha224':
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case 'filename|sha256':
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case 'filename|sha384':
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case 'filename|sha512':
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case 'filename|sha512/224':
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case 'filename|sha512/256':
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case 'filename|sha3-224':
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case 'filename|sha3-256':
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case 'filename|sha3-384':
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case 'filename|sha3-512':
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case 'filename|authentihash':
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$parts = explode('|', $type);
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$length = self::HEX_HAS_LENGTHS[$parts[1]];
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if (preg_match("#^.+\|[0-9a-f]{" . $length . "}$#", $value)) {
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return true;
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}
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return __('Checksum has an invalid length or format (expected: filename|%s hexadecimal characters). Please double check the value or select type "other".', $length);
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case 'filename|ssdeep':
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if (substr_count($value, '|') != 1 || !preg_match("#^.+\|.+$#", $value)) {
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return __('Invalid composite type. The format has to be %s.', $type);
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} else {
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$composite = explode('|', $value);
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$value = $composite[1];
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if (substr_count($value, ':') == 2) {
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$parts = explode(':', $value);
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if (self::isPositiveInteger($parts[0])) {
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return true;
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}
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}
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}
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return __('Invalid SSDeep hash (expected: blocksize:hash:hash).');
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case 'filename|tlsh':
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if (preg_match("#^.+\|[0-9a-f]{35,}$#", $value)) {
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return true;
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}
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return __('Checksum has an invalid length or format (expected: filename|at least 35 hexadecimal characters). Please double check the value or select type "other".');
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case 'filename|vhash':
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if (preg_match('#^.+\|.+$#', $value)) {
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return true;
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}
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return __('Checksum has an invalid length or format (expected: filename|string characters). Please double check the value or select type "other".');
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case 'ip-src':
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case 'ip-dst':
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if (strpos($value, '/') !== false) {
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$parts = explode("/", $value);
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if (count($parts) !== 2 || !self::isPositiveInteger($parts[1])) {
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return __('Invalid CIDR notation value found.');
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}
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if (filter_var($parts[0], FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
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if ($parts[1] > 32) {
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return __('Invalid CIDR notation value found, for IPv4 must be lower or equal 32.');
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}
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} else if (filter_var($parts[0], FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
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if ($parts[1] > 128) {
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return __('Invalid CIDR notation value found, for IPv6 must be lower or equal 128.');
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}
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} else {
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return __('IP address has an invalid format.');
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}
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} else if (!filter_var($value, FILTER_VALIDATE_IP)) {
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return __('IP address has an invalid format.');
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}
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return true;
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case 'port':
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if (!self::isPortValid($value)) {
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return __('Port numbers have to be integers between 1 and 65535.');
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}
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return true;
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case 'ip-dst|port':
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case 'ip-src|port':
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$parts = explode('|', $value);
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if (!filter_var($parts[0], FILTER_VALIDATE_IP)) {
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return __('IP address has an invalid format.');
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}
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if (!self::isPortValid($parts[1])) {
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return __('Port numbers have to be integers between 1 and 65535.');
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}
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return true;
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case 'mac-address':
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if (preg_match('/^([a-fA-F0-9]{2}[:]?){6}$/', $value)) {
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return true;
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}
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break;
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case 'mac-eui-64':
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if (preg_match('/^([a-fA-F0-9]{2}[:]?){8}$/', $value)) {
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return true;
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}
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break;
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case 'hostname':
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case 'domain':
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if (self::isDomainValid($value)) {
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return true;
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}
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return __('%s has an invalid format. Please double check the value or select type "other".', ucfirst($type));
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case 'hostname|port':
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$parts = explode('|', $value);
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if (!self::isDomainValid($parts[0])) {
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return __('Hostname has an invalid format.');
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}
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if (!self::isPortValid($parts[1])) {
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return __('Port numbers have to be integers between 1 and 65535.');
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}
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return true;
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case 'domain|ip':
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if (preg_match("#^[A-Z0-9.\-_]+\.[A-Z0-9\-]{2,}\|.*$#i", $value)) {
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$parts = explode('|', $value);
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if (filter_var($parts[1], FILTER_VALIDATE_IP)) {
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return true;
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} else {
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return __('IP address has an invalid format.');
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}
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}
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return __('Domain name has an invalid format.');
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case 'email':
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case 'email-src':
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case 'eppn':
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case 'email-dst':
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case 'target-email':
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case 'whois-registrant-email':
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case 'dns-soa-email':
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case 'jabber-id':
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// we don't use the native function to prevent issues with partial email addresses
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if (preg_match("#^.*\@.*\..*$#i", $value)) {
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return true;
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}
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return __('Email address has an invalid format. Please double check the value or select type "other".');
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case 'vulnerability':
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if (preg_match("#^(CVE-)[0-9]{4}(-)[0-9]{4,}$#", $value)) {
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return true;
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}
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return __('Invalid format. Expected: CVE-xxxx-xxxx...');
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case 'weakness':
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if (preg_match("#^(CWE-)[0-9]{1,}$#", $value)) {
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return true;
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}
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return __('Invalid format. Expected: CWE-x...');
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case 'named pipe':
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if (!preg_match("#\n#", $value)) {
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return true;
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}
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break;
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case 'windows-service-name':
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case 'windows-service-displayname':
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if (strlen($value) > 256 || preg_match('#[\\\/]#', $value)) {
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return __('Invalid format. Only values shorter than 256 characters that don\'t include any forward or backward slashes are allowed.');
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}
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return true;
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case 'mutex':
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case 'process-state':
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||
case 'snort':
|
||
case 'bro':
|
||
case 'zeek':
|
||
case 'community-id':
|
||
case 'anonymised':
|
||
case 'pattern-in-file':
|
||
case 'pattern-in-traffic':
|
||
case 'pattern-in-memory':
|
||
case 'filename-pattern':
|
||
case 'pgp-public-key':
|
||
case 'pgp-private-key':
|
||
case 'ssh-fingerprint':
|
||
case 'yara':
|
||
case 'stix2-pattern':
|
||
case 'sigma':
|
||
case 'gene':
|
||
case 'kusto-query':
|
||
case 'mime-type':
|
||
case 'identity-card-number':
|
||
case 'cookie':
|
||
case 'attachment':
|
||
case 'malware-sample':
|
||
case 'comment':
|
||
case 'text':
|
||
case 'other':
|
||
case 'cpe':
|
||
case 'email-attachment':
|
||
case 'email-body':
|
||
case 'email-header':
|
||
case 'first-name':
|
||
case 'middle-name':
|
||
case 'last-name':
|
||
case 'full-name':
|
||
return true;
|
||
case 'link':
|
||
// Moved to a native function whilst still enforcing the scheme as a requirement
|
||
return filter_var($value, FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_REQUIRED) && !preg_match("#\n#", $value);
|
||
case 'hex':
|
||
return ctype_xdigit($value);
|
||
case 'target-user':
|
||
case 'campaign-name':
|
||
case 'campaign-id':
|
||
case 'threat-actor':
|
||
case 'target-machine':
|
||
case 'target-org':
|
||
case 'target-location':
|
||
case 'target-external':
|
||
case 'email-subject':
|
||
case 'malware-type':
|
||
// TODO: review url/uri validation
|
||
case 'url':
|
||
case 'uri':
|
||
case 'user-agent':
|
||
case 'regkey':
|
||
case 'regkey|value':
|
||
case 'filename':
|
||
case 'pdb':
|
||
case 'windows-scheduled-task':
|
||
case 'whois-registrant-name':
|
||
case 'whois-registrant-org':
|
||
case 'whois-registrar':
|
||
case 'whois-creation-date':
|
||
case 'date-of-birth':
|
||
case 'place-of-birth':
|
||
case 'gender':
|
||
case 'passport-number':
|
||
case 'passport-country':
|
||
case 'passport-expiration':
|
||
case 'redress-number':
|
||
case 'nationality':
|
||
case 'visa-number':
|
||
case 'issue-date-of-the-visa':
|
||
case 'primary-residence':
|
||
case 'country-of-residence':
|
||
case 'special-service-request':
|
||
case 'frequent-flyer-number':
|
||
case 'travel-details':
|
||
case 'payment-details':
|
||
case 'place-port-of-original-embarkation':
|
||
case 'place-port-of-clearance':
|
||
case 'place-port-of-onward-foreign-destination':
|
||
case 'passenger-name-record-locator-number':
|
||
case 'email-dst-display-name':
|
||
case 'email-src-display-name':
|
||
case 'email-reply-to':
|
||
case 'email-x-mailer':
|
||
case 'email-mime-boundary':
|
||
case 'email-thread-index':
|
||
case 'email-message-id':
|
||
case 'github-username':
|
||
case 'github-repository':
|
||
case 'github-organisation':
|
||
case 'twitter-id':
|
||
case 'dkim':
|
||
case 'dkim-signature':
|
||
case 'favicon-mmh3':
|
||
case 'chrome-extension-id':
|
||
case 'mobile-application-id':
|
||
if (strpos($value, "\n") !== false) {
|
||
return __('Value must not contain new line character.');
|
||
}
|
||
return true;
|
||
case 'datetime':
|
||
if (strtotime($value) !== false) {
|
||
return true;
|
||
}
|
||
return __('Datetime has to be in the ISO 8601 format.');
|
||
case 'size-in-bytes':
|
||
case 'counter':
|
||
if (self::isPositiveInteger($value)) {
|
||
return true;
|
||
}
|
||
return __('The value has to be a whole number greater or equal 0.');
|
||
/* case 'targeted-threat-index':
|
||
if (!is_numeric($value) || $value < 0 || $value > 10) {
|
||
return __('The value has to be a number between 0 and 10.');
|
||
}
|
||
return true;*/
|
||
case 'iban':
|
||
case 'bic':
|
||
case 'btc':
|
||
case 'dash':
|
||
case 'xmr':
|
||
if (preg_match('/^[a-zA-Z0-9]+$/', $value)) {
|
||
return true;
|
||
}
|
||
break;
|
||
case 'vhash':
|
||
if (preg_match('/^.+$/', $value)) {
|
||
return true;
|
||
}
|
||
break;
|
||
case 'bin':
|
||
case 'cc-number':
|
||
case 'bank-account-nr':
|
||
case 'aba-rtn':
|
||
case 'prtn':
|
||
case 'phone-number':
|
||
case 'whois-registrant-phone':
|
||
case 'float':
|
||
return is_numeric($value);
|
||
case 'cortex':
|
||
json_decode($value);
|
||
return json_last_error() === JSON_ERROR_NONE;
|
||
case 'boolean':
|
||
return $value == 1 || $value == 0;
|
||
case 'AS':
|
||
if (self::isPositiveInteger($value) && $value <= 4294967295) {
|
||
return true;
|
||
}
|
||
return __('AS number have to be integers between 1 and 4294967295');
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* @param string $value
|
||
* @return bool
|
||
*/
|
||
private static function isDomainValid($value)
|
||
{
|
||
return preg_match("#^[A-Z0-9.\-_]+\.[A-Z0-9\-]{2,}$#i", $value) === 1;
|
||
}
|
||
|
||
/**
|
||
* @param string $value
|
||
* @return bool
|
||
*/
|
||
private static function isPortValid($value)
|
||
{
|
||
return self::isPositiveInteger($value) && $value >= 1 && $value <= 65535;
|
||
}
|
||
|
||
/**
|
||
* @param string $type
|
||
* @param string $value
|
||
* @return bool
|
||
*/
|
||
private static function isHashValid($type, $value)
|
||
{
|
||
if (!isset(self::HEX_HAS_LENGTHS[$type])) {
|
||
throw new InvalidArgumentException("Invalid hash type '$type'.");
|
||
}
|
||
return strlen($value) === self::HEX_HAS_LENGTHS[$type] && ctype_xdigit($value);
|
||
}
|
||
|
||
/**
|
||
* Returns true if input value is positive integer or zero.
|
||
* @param int|string $value
|
||
* @return bool
|
||
*/
|
||
private static function isPositiveInteger($value)
|
||
{
|
||
return (is_int($value) && $value >= 0) || ctype_digit($value);
|
||
}
|
||
|
||
/**
|
||
* Temporary solution for utf8 columns until we migrate to utf8mb4.
|
||
* via https://stackoverflow.com/questions/16496554/can-php-detect-4-byte-encoded-utf8-chars
|
||
* @param string $input
|
||
* @return array|string|string[]|null
|
||
*/
|
||
private static function handle4ByteUnicode($input)
|
||
{
|
||
return preg_replace(
|
||
'%(?:
|
||
\xF0[\x90-\xBF][\x80-\xBF]{2}
|
||
| [\xF1-\xF3][\x80-\xBF]{3}
|
||
| \xF4[\x80-\x8F][\x80-\xBF]{2}
|
||
)%xs',
|
||
'?',
|
||
$input
|
||
);
|
||
}
|
||
}
|