function cert_parse_json($raw_cert_data, $raw_next_cert_data = null, $host = null, $validate_hostname = false)
{
global $random_blurp;
global $ev_oids;
$result = array();
$cert_data = openssl_x509_parse($raw_cert_data);
if (isset($raw_next_cert_data)) {
$next_cert_data = openssl_x509_parse($raw_next_cert_data);
}
$today = date("Y-m-d");
//cert
if (isset($cert_data)) {
// purposes
$purposes = array();
foreach ($cert_data['purposes'] as $key => $purpose) {
$purposes[$purpose[2]]["ca"] = $purpose[1];
$purposes[$purpose[2]]["general"] = $purpose[0];
}
unset($cert_data['purposes']);
$cert_data['purposes'] = $purposes;
$result["cert_data"] = $cert_data;
}
// valid from
if (!empty($result['cert_data']['validFrom_time_t'])) {
if ($today < date(DATE_RFC2822, $result['cert_data']['validFrom_time_t'])) {
$result['cert_issued_in_future'] = false;
} else {
$result['cert_issued_in_future'] = true;
$result['warning'][] = "Certificate issue date is in the future: " . date(DATE_RFC2822, $data['cert_data']['validFrom_time_t']);
}
}
// expired
if (!empty($cert_data['validTo_time_t'])) {
if ($today > date(DATE_RFC2822, $cert_data['validFrom_time_t']) || strtotime($today) < strtotime(date(DATE_RFC2822, $cert_data['validTo_time_t']))) {
$result['cert_expired'] = false;
} else {
$result['cert_expired'] = true;
$result['warning'][] = "Certificate expired! Expiration date: " . date(DATE_RFC2822, $cert_data['validTo_time_t']);
}
}
// almost expired
if (!empty($cert_data['validTo_time_t'])) {
$certExpiryDate = strtotime(date(DATE_RFC2822, $cert_data['validTo_time_t']));
$certExpiryDiff = $certExpiryDate - strtotime($today);
if ($certExpiryDiff < 2592000) {
$result['cert_expires_in_less_than_thirty_days'] = true;
$result['warning'][] = "Certificate expires in " . round($certExpiryDiff / 84600) . " days!. Expiration date: " . date(DATE_RFC2822, $certExpiryDate);
} else {
$result['cert_expires_in_less_than_thirty_days'] = false;
}
}
if (array_search(explode("Policy: ", explode("\n", $cert_data['extensions']['certificatePolicies'])[0])[1], $ev_oids)) {
$result["validation_type"] = "extended";
} else {
if (isset($cert_data['subject']['O'])) {
$result["validation_type"] = "organization";
} else {
if (isset($cert_data['subject']['CN'])) {
$result["validation_type"] = "domain";
}
}
}
// issuer
if ($raw_next_cert_data) {
if (verify_cert_issuer_by_subject_hash($raw_cert_data, $raw_next_cert_data)) {
$result["issuer_valid"] = true;
} else {
$result["issuer_valid"] = false;
$result['warning'][] = "Provided certificate issuer does not match issuer in certificate. Sent chain order wrong.";
}
}
// crl
if (isset($cert_data['extensions']['crlDistributionPoints'])) {
$result["crl"] = crl_verify_json($raw_cert_data);
if (is_array($result["crl"])) {
foreach ($result["crl"] as $key => $value) {
if ($value["status"] == "revoked") {
$result['warning'][] = "Certificate revoked on CRL: " . $value['crl_uri'] . ". Revocation time: " . $value['revoked_on'] . ".";
}
}
}
} else {
$result["crl"] = "No CRL URI found in certificate";
}
// ocsp
if (isset($cert_data['extensions']['authorityInfoAccess'])) {
$ocsp_uris = explode("OCSP - URI:", $cert_data['extensions']['authorityInfoAccess']);
unset($ocsp_uris[0]);
if (isset($ocsp_uris)) {
if (isset($raw_next_cert_data)) {
foreach ($ocsp_uris as $key => $ocsp_uri) {
$ocsp_uri = explode("\n", $ocsp_uri)[0];
$ocsp_uri = explode(" ", $ocsp_uri)[0];
$result["ocsp"]["{$key}"] = ocsp_verify_json($raw_cert_data, $raw_next_cert_data, $ocsp_uri);
if ($result['ocsp'][$key]["status"] == "revoked") {
$result['warning'][] = "Certificate revoked on OCSP: " . $result['ocsp'][$key]['ocsp_uri'] . ". Revocation time: " . $result['ocsp'][$key]['revocation_time'] . ".";
} elseif ($result['ocsp'][$key]["status"] == "unknown") {
$result['warning'][] = "OCSP error on: " . $result['ocsp'][$key]['ocsp_uri'] . ".";
}
}
} else {
$result["ocsp"] = "No issuer cert provided. Unable to send OCSP request.";
}
} else {
$result["ocsp"] = "No OCSP URI found in certificate";
}
} else {
$result["ocsp"] = "No OCSP URI found in certificate";
}
// hostname validation
if ($validate_hostname == true) {
$result["hostname_checked"] = $host;
if (isset($cert_data['subject']['CN'])) {
if (verify_certificate_hostname($raw_cert_data, $host)) {
$result["hostname_in_san_or_cn"] = "true";
} else {
$result["hostname_in_san_or_cn"] = "false";
$result['warning'][] = "Hostname " . $host . " not found in certificate.";
}
}
} else {
$result["hostname_in_san_or_cn"] = "n/a; ca signing certificate";
}
//serial number
if (isset($cert_data['serialNumber'])) {
$serial = [];
$sn = str_split(strtoupper(bcdechex($cert_data['serialNumber'])), 2);
$sn_len = count($sn);
foreach ($sn as $key => $s) {
$serial[] = htmlspecialchars($s);
if ($key != $sn_len - 1) {
$serial[] = ":";
}
}
$result["serialNumber"] = implode("", $serial);
}
// key details
$key_details = openssl_pkey_get_details(openssl_pkey_get_public($raw_cert_data));
$export_pem = "";
openssl_x509_export($raw_cert_data, $export_pem);
if (isset($key_details['rsa'])) {
$result["key"]["type"] = "rsa";
$result["key"]["bits"] = $key_details['bits'];
if ($key_details['bits'] < 2048) {
$result['warning'][] = $key_details['bits'] . " bit RSA key is not safe. Upgrade to at least 4096 bits.";
}
// weak debian key check
$bin_modulus = $key_details['rsa']['n'];
# blacklist format requires sha1sum of output from "openssl x509 -noout -modulus" including the Modulus= and newline.
# create the blacklist:
# https://packages.debian.org/source/squeeze/openssl-blacklist
# svn co svn://svn.debian.org/pkg-openssl/openssl-blacklist/
# find openssl-blacklist/trunk/blacklists/ -iname "*.db" -exec cat {} >> unsorted_blacklist.db \;
# sort -u unsorted_blacklist.db > debian_blacklist.db
$mod_sha1sum = sha1("Modulus=" . strtoupper(bin2hex($bin_modulus)) . "\n");
#pre_dump($mod_sha1sum);
$blacklist_file = fopen('inc/debian_blacklist.db', 'r');
$key_in_blacklist = false;
while (($buffer = fgets($blacklist_file)) !== false) {
if (strpos($buffer, $mod_sha1sum) !== false) {
$key_in_blacklist = true;
break;
}
}
fclose($blacklist_file);
if ($key_in_blacklist == true) {
$result["key"]["weak_debian_rsa_key"] = "true";
$result['warning'][] = "Weak Debian key found. Remove this key right now and create a new one.";
}
} else {
if (isset($key_details['dsa'])) {
$result["key"]["type"] = "dsa";
$result["key"]["bits"] = $key_details['bits'];
} else {
if (isset($key_details['dh'])) {
$result["key"]["type"] = "dh";
$result["key"]["bits"] = $key_details['bits'];
} else {
if (isset($key_details['ec'])) {
$result["key"]["type"] = "ecdsa";
$result["key"]["bits"] = $key_details['bits'];
} else {
$result["key"]["type"] = "unknown";
$result["key"]["bits"] = $key_details['bits'];
}
}
}
}
// signature algorithm
$result["key"]["signature_algorithm"] = cert_signature_algorithm($raw_cert_data);
if ($result["key"]["signature_algorithm"] == "sha1WithRSAEncryption") {
$result['warning'][] = "SHA-1 certificate. Upgrade (re-issue) to SHA-256 or better.";
}
if (isset($export_pem)) {
$result["key"]["certificate_pem"] = $export_pem;
}
if (isset($key_details['key'])) {
$result["key"]["public_key_pem"] = $key_details['key'];
$result["key"]["spki_hash"] = spki_hash($export_pem);
}
return $result;
}
function cert_parse_json($raw_cert_data, $raw_next_cert_data = null, $host = null, $validate_hostname = false)
{
global $random_blurp;
global $ev_oids;
$result = array();
$cert_data = openssl_x509_parse($raw_cert_data);
if (isset($raw_next_cert_data)) {
$next_cert_data = openssl_x509_parse($raw_next_cert_data);
}
$today = date("Y-m-d");
//cert
if (isset($cert_data)) {
// purposes
$purposes = array();
foreach ($cert_data['purposes'] as $key => $purpose) {
$purposes[$purpose[2]]["ca"] = $purpose[1];
$purposes[$purpose[2]]["general"] = $purpose[0];
}
unset($cert_data['purposes']);
$cert_data['purposes'] = $purposes;
$result["cert_data"] = $cert_data;
}
// valid from
if (!empty($result['cert_data']['validFrom_time_t'])) {
if ($today < date(DATE_RFC2822, $result['cert_data']['validFrom_time_t'])) {
$result['cert_issued_in_future'] = false;
} else {
$result['cert_issued_in_future'] = true;
$result['warning'][] = "Certificate issue date is in the future: " . date(DATE_RFC2822, $data['cert_data']['validFrom_time_t']);
}
}
// expired
if (!empty($cert_data['validTo_time_t'])) {
if ($today > date(DATE_RFC2822, $cert_data['validFrom_time_t']) || strtotime($today) < strtotime(date(DATE_RFC2822, $cert_data['validTo_time_t']))) {
$result['cert_expired'] = false;
} else {
$result['cert_expired'] = true;
$result['warning'][] = "Certificate expired! Expiration date: " . date(DATE_RFC2822, $cert_data['validTo_time_t']);
}
}
// almost expired
if (!empty($cert_data['validTo_time_t'])) {
$certExpiryDate = strtotime(date(DATE_RFC2822, $cert_data['validTo_time_t']));
$certExpiryDiff = $certExpiryDate - strtotime($today);
if ($certExpiryDiff < 2592000) {
$result['cert_expires_in_less_than_thirty_days'] = true;
$result['warning'][] = "Certificate expires in " . round($certExpiryDiff / 84600) . " days!. Expiration date: " . date(DATE_RFC2822, $certExpiryDate);
} else {
$result['cert_expires_in_less_than_thirty_days'] = false;
}
}
if (array_search(explode("Policy: ", explode("\n", $cert_data['extensions']['certificatePolicies'])[0])[1], $ev_oids)) {
$result["validation_type"] = "extended";
} else {
if (isset($cert_data['subject']['O'])) {
$result["validation_type"] = "organization";
} else {
if (isset($cert_data['subject']['CN'])) {
$result["validation_type"] = "domain";
}
}
}
// issuer
if ($raw_next_cert_data) {
if (verify_cert_issuer_by_subject_hash($raw_cert_data, $raw_next_cert_data)) {
$result["issuer_valid"] = true;
} else {
$result["issuer_valid"] = false;
$result['warning'][] = "Provided certificate issuer does not match issuer in certificate. Sent chain order wrong.";
}
}
// crl
if (isset($cert_data['extensions']['crlDistributionPoints'])) {
$result["crl"] = crl_verify_json($raw_cert_data);
if (is_array($result["crl"])) {
foreach ($result["crl"] as $key => $value) {
if ($value["status"] == "revoked") {
$result['warning'][] = "Certificate revoked on CRL: " . $value['crl_uri'] . ". Revocation time: " . $value['revoked_on'] . ".";
}
}
}
} else {
$result["crl"] = "No CRL URI found in certificate";
}
// ocsp
if (isset($cert_data['extensions']['authorityInfoAccess'])) {
$ocsp_uris = explode("OCSP - URI:", $cert_data['extensions']['authorityInfoAccess']);
unset($ocsp_uris[0]);
if (isset($ocsp_uris)) {
if (isset($raw_next_cert_data)) {
foreach ($ocsp_uris as $key => $ocsp_uri) {
$ocsp_uri = explode("\n", $ocsp_uri)[0];
$ocsp_uri = explode(" ", $ocsp_uri)[0];
$result["ocsp"]["{$key}"] = ocsp_verify_json($raw_cert_data, $raw_next_cert_data, $ocsp_uri);
if ($result['ocsp'][$key]["status"] == "revoked") {
$result['warning'][] = "Certificate revoked on OCSP: " . $result['ocsp'][$key]['ocsp_uri'] . ". Revocation time: " . $result['ocsp'][$key]['revocation_time'] . ".";
} elseif ($result['ocsp'][$key]["status"] == "unknown") {
$result['warning'][] = "OCSP error on: " . $result['ocsp'][$key]['ocsp_uri'] . ".";
}
}
} else {
$result["ocsp"] = "No issuer cert provided. Unable to send OCSP request.";
}
} else {
$result["ocsp"] = "No OCSP URI found in certificate";
}
} else {
$result["ocsp"] = "No OCSP URI found in certificate";
}
// hostname validation
if ($validate_hostname == true) {
$result["hostname_checked"] = $host;
if (isset($cert_data['subject']['CN'])) {
if (verify_certificate_hostname($raw_cert_data, $host)) {
$result["hostname_in_san_or_cn"] = "true";
} else {
$result["hostname_in_san_or_cn"] = "false";
$result['warning'][] = "Hostname " . $host . " not found in certificate.";
}
}
} else {
$result["hostname_in_san_or_cn"] = "n/a; ca signing certificate";
}
//serial number
if (isset($cert_data['serialNumber'])) {
$serial = [];
$sn = str_split(strtoupper(bcdechex($cert_data['serialNumber'])), 2);
$sn_len = count($sn);
foreach ($sn as $key => $s) {
$serial[] = htmlspecialchars($s);
if ($key != $sn_len - 1) {
$serial[] = ":";
}
}
$result["serialNumber"] = implode("", $serial);
}
// key details
$key_details = openssl_pkey_get_details(openssl_pkey_get_public($raw_cert_data));
$export_pem = "";
openssl_x509_export($raw_cert_data, $export_pem);
if (isset($key_details['rsa'])) {
$result["key"]["type"] = "rsa";
$result["key"]["bits"] = $key_details['bits'];
if ($key_details['bits'] < 2048) {
$result['warning'][] = $key_details['bits'] . " bit RSA key is not safe. Upgrade to at least 4096 bits.";
}
} else {
if (isset($key_details['dsa'])) {
$result["key"]["type"] = "dsa";
$result["key"]["bits"] = $key_details['bits'];
} else {
if (isset($key_details['dh'])) {
$result["key"]["type"] = "dh";
$result["key"]["bits"] = $key_details['bits'];
} else {
if (isset($key_details['ec'])) {
$result["key"]["type"] = "ecdsa";
$result["key"]["bits"] = $key_details['bits'];
} else {
$result["key"]["type"] = "unknown";
$result["key"]["bits"] = $key_details['bits'];
}
}
}
}
// signature algorithm
$result["key"]["signature_algorithm"] = cert_signature_algorithm($raw_cert_data);
if ($result["key"]["signature_algorithm"] == "sha1WithRSAEncryption") {
$result['warning'][] = "SHA-1 certificate. Upgrade (re-issue) to SHA-256 or better.";
}
if (isset($export_pem)) {
$result["key"]["certificate_pem"] = $export_pem;
}
if (isset($key_details['key'])) {
$result["key"]["public_key_pem"] = $key_details['key'];
$result["key"]["spki_hash"] = spki_hash($export_pem);
}
return $result;
}
function cert_parse_json($raw_cert_data, $raw_next_cert_data = null, $host = null, $validate_hostname = false, $port = "443", $include_chain = null)
{
global $random_blurp;
global $ev_oids;
global $timeout;
$result = array();
$cert_data = openssl_x509_parse($raw_cert_data);
if (isset($raw_next_cert_data)) {
$next_cert_data = openssl_x509_parse($raw_next_cert_data);
}
$today = date("Y-m-d");
//cert
if (isset($cert_data)) {
// purposes
$purposes = array();
foreach ($cert_data['purposes'] as $key => $purpose) {
$purposes[$purpose[2]]["ca"] = $purpose[1];
$purposes[$purpose[2]]["general"] = $purpose[0];
}
unset($cert_data['purposes']);
$cert_data['purposes'] = $purposes;
$result["cert_data"] = $cert_data;
}
// valid from
if (!empty($result['cert_data']['validFrom_time_t'])) {
if ($today < date(DATE_RFC2822, $result['cert_data']['validFrom_time_t'])) {
$result['cert_issued_in_future'] = false;
} else {
$result['cert_issued_in_future'] = true;
$result['warning'][] = "Certificate issue date is in the future: " . date(DATE_RFC2822, $data['cert_data']['validFrom_time_t']);
}
}
// expired
if (!empty($cert_data['validTo_time_t'])) {
if ($today > date(DATE_RFC2822, $cert_data['validFrom_time_t']) || strtotime($today) < strtotime(date(DATE_RFC2822, $cert_data['validTo_time_t']))) {
$result['cert_expired'] = false;
} else {
$result['cert_expired'] = true;
$result['warning'][] = "Certificate expired! Expiration date: " . date(DATE_RFC2822, $cert_data['validTo_time_t']);
}
}
// almost expired
if (!empty($cert_data['validTo_time_t'])) {
$certExpiryDate = strtotime(date(DATE_RFC2822, $cert_data['validTo_time_t']));
$certExpiryDiff = $certExpiryDate - strtotime($today);
if ($certExpiryDiff < 2592000) {
$result['cert_expires_in_less_than_thirty_days'] = true;
$result['warning'][] = "Certificate expires in " . round($certExpiryDiff / 84600) . " days!. Expiration date: " . date(DATE_RFC2822, $certExpiryDate);
} else {
$result['cert_expires_in_less_than_thirty_days'] = false;
}
}
if (array_search(explode("Policy: ", explode("\n", $cert_data['extensions']['certificatePolicies'])[0])[1], $ev_oids)) {
$result["validation_type"] = "extended";
} else {
if (isset($cert_data['subject']['O'])) {
$result["validation_type"] = "organization";
} else {
if (isset($cert_data['subject']['CN'])) {
$result["validation_type"] = "domain";
}
}
}
// issuer
if ($raw_next_cert_data) {
if (verify_cert_issuer_by_subject_hash($raw_cert_data, $raw_next_cert_data)) {
$result["issuer_valid"] = true;
} else {
$result["issuer_valid"] = false;
$result['warning'][] = "Provided certificate issuer does not match issuer in certificate. Sent chain order wrong.";
}
}
// crl
if (isset($cert_data['extensions']['crlDistributionPoints'])) {
$result["crl"] = crl_verify_json($raw_cert_data);
if (is_array($result["crl"])) {
foreach ($result["crl"] as $key => $value) {
if ($value["status"] == "revoked") {
$result['warning'][] = "Certificate revoked on CRL: " . $value['crl_uri'] . ". Revocation time: " . $value['revoked_on'] . ".";
}
}
}
} else {
$result["crl"] = "No CRL URI found in certificate";
}
// ocsp
if (isset($cert_data['extensions']['authorityInfoAccess'])) {
$ocsp_uris = explode("OCSP - URI:", $cert_data['extensions']['authorityInfoAccess']);
unset($ocsp_uris[0]);
if (isset($ocsp_uris)) {
if (isset($raw_next_cert_data)) {
foreach ($ocsp_uris as $key => $ocsp_uri) {
$ocsp_uri = explode("\n", $ocsp_uri)[0];
$ocsp_uri = explode(" ", $ocsp_uri)[0];
$result["ocsp"]["{$key}"] = ocsp_verify_json($raw_cert_data, $raw_next_cert_data, $ocsp_uri);
if ($result['ocsp'][$key]["status"] == "revoked") {
$result['warning'][] = "Certificate revoked on OCSP: " . $result['ocsp'][$key]['ocsp_uri'] . ". Revocation time: " . $result['ocsp'][$key]['revocation_time'] . ".";
} elseif ($result['ocsp'][$key]["status"] == "unknown") {
$result['warning'][] = "OCSP error on: " . $result['ocsp'][$key]['ocsp_uri'] . ".";
}
}
} else {
$result["ocsp"] = "No issuer cert provided. Unable to send OCSP request.";
}
} else {
$result["ocsp"] = "No OCSP URI found in certificate";
}
} else {
$result["ocsp"] = "No OCSP URI found in certificate";
}
// hostname validation
if ($validate_hostname == true) {
$result["hostname_checked"] = $host;
if (isset($cert_data['subject']['CN'])) {
if (verify_certificate_hostname($raw_cert_data, $host)) {
$result["hostname_in_san_or_cn"] = "true";
} else {
$result["hostname_in_san_or_cn"] = "false";
$result['warning'][] = "Hostname " . $host . " not found in certificate.";
}
}
} else {
$result["hostname_in_san_or_cn"] = "n/a; ca signing certificate";
}
//serial number
if (isset($cert_data['serialNumber'])) {
$serial = [];
$sn = str_split(strtoupper(bcdechex($cert_data['serialNumber'])), 2);
$sn_len = count($sn);
foreach ($sn as $key => $s) {
$serial[] = htmlspecialchars($s);
if ($key != $sn_len - 1) {
$serial[] = ":";
}
}
$result["serialNumber"] = implode("", $serial);
}
// key details
$key_details = openssl_pkey_get_details(openssl_pkey_get_public($raw_cert_data));
$export_pem = "";
openssl_x509_export($raw_cert_data, $export_pem);
// save pem. this because the reconstruct chain function works better
// this way. not all certs have authorityinfoaccess. We first check if
// we already have a matching cert.
if (!is_dir('crt_hash')) {
mkdir('crt_hash');
}
// filenames of saved certs are hashes of the asort full subject.
$sort_subject = $cert_data['subject'];
asort($sort_subject);
foreach ($sort_subject as $key => $value) {
$name_full = "/" . $key . "=" . $value . $name_full;
}
$crt_hash = hash("sha256", $name_full);
$crt_hash_folder = "crt_hash/";
$crt_hash_file = $crt_hash_folder . $crt_hash . ".pem";
if (file_exists($crt_hash_file)) {
if (time() - filemtime($crt_hash_file) > 5 * 84600) {
// file older than 5 days. crt might have changed, retry.
$content_hash = sha1_file($crt_hash_file);
rename($crt_hash_file, $crt_hash_folder . $content_hash . "content_hash_save.pem");
file_put_contents($crt_hash_file, $export_pem);
}
} else {
file_put_contents($crt_hash_file, $export_pem);
}
if (stat($crt_hash_file)['size'] < 10) {
//probably a corrupt file. sould be at least +100KB.
unlink($crt_hash_file);
}
//chain reconstruction
if ($include_chain && $raw_cert_data) {
$return_chain = array();
$export_pem = "";
openssl_x509_export($raw_cert_data, $export_pem);
$crt_cn = openssl_x509_parse($raw_cert_data)['name'];
$export_pem = "#start " . $crt_cn . "\n" . $export_pem . "\n#end " . $crt_cn . "\n";
array_push($return_chain, $export_pem);
$certificate_chain = array();
$issuer_crt = get_issuer_chain($raw_cert_data);
if (count($issuer_crt['certs']) >= 1) {
$issuercrts = array_unique($issuer_crt['certs']);
foreach ($issuercrts as $key => $value) {
array_push($return_chain, $value);
}
}
$return_chain = array_unique($return_chain);
if (count($return_chain) > 1) {
$result["correct_chain"]["cns"] = array();
$crt_cn = array();
foreach ($return_chain as $retc_key => $retc_value) {
$issuer_full = "";
$subject_full = "";
$sort_issuer = openssl_x509_parse($retc_value)['issuer'];
$sort_subject = openssl_x509_parse($retc_value)['subject'];
asort($sort_subject);
foreach ($sort_subject as $sub_key => $sub_value) {
$subject_full = "/" . $sub_key . "=" . $sub_value . $subject_full;
}
asort($sort_issuer);
foreach ($sort_issuer as $iss_key => $iss_value) {
$issuer_full = "/" . $iss_key . "=" . $iss_value . $issuer_full;
}
$crt_cn['cn'] = $subject_full;
$crt_cn['issuer'] = $issuer_full;
array_push($result["correct_chain"]["cns"], $crt_cn);
}
$result["correct_chain"]["chain"] = $return_chain;
}
}
//hashes
$string = $export_pem;
$pattern = '/-----(.*)-----/';
$replacement = '';
$string = preg_replace($pattern, $replacement, $string);
$pattern = '/\\n/';
$replacement = '';
$export_pem_preg = preg_replace($pattern, $replacement, $string);
$export_pem_preg = wordwrap($export_pem_preg, 77, "\n", TRUE);
$result['hash']['md5'] = cert_hash('md5', $export_pem_preg);
$result['hash']['sha1'] = cert_hash('sha1', $export_pem_preg);
$result['hash']['sha256'] = cert_hash('sha256', $export_pem_preg);
$result['hash']['sha384'] = cert_hash('sha384', $export_pem_preg);
$result['hash']['sha512'] = cert_hash('sha512', $export_pem_preg);
//TLSA check
if (!empty($cert_data['subject']['CN']) && !empty($host)) {
if ($validate_hostname == true) {
$tlsa_record = shell_exec("timeout " . $timeout . " dig +short +dnssec +time=" . $timeout . " TLSA _" . escapeshellcmd($port) . "._tcp." . escapeshellcmd($host) . " 2>&1 | head -n 1");
if (!empty($tlsa_record)) {
$tlsa = explode(" ", $tlsa_record, 4);
$pattern = '/ /';
$replacement = '';
$result['tlsa']['tlsa_hash'] = trim(strtolower(preg_replace($pattern, $replacement, $tlsa[3])));
$result['tlsa']['tlsa_usage'] = $tlsa[0];
$result['tlsa']['tlsa_selector'] = $tlsa[1];
$result['tlsa']['tlsa_matching_type'] = $tlsa[2];
$result['tlsa']['error'] = 'none';
} else {
$result['tlsa']['error'] = 'No TLSA record found.';
$result['tlsa']['example'] = '_' . htmlspecialchars($port) . '._tcp.' . htmlspecialchars($host) . ' IN TLSA 3 0 1 ' . $result['hash']['sha256'] . ';';
}
} else {
$result['tlsa']['error'] = 'CA certificate, TLSA not applicable.';
}
}
if (isset($key_details['rsa'])) {
$result["key"]["type"] = "rsa";
$result["key"]["bits"] = $key_details['bits'];
if ($key_details['bits'] < 2048) {
$result['warning'][] = $key_details['bits'] . " bit RSA key is not safe. Upgrade to at least 4096 bits.";
}
// weak debian key check
$bin_modulus = $key_details['rsa']['n'];
# blacklist format requires sha1sum of output from "openssl x509 -noout -modulus" including the Modulus= and newline.
# create the blacklist:
# https://packages.debian.org/source/squeeze/openssl-blacklist
# svn co svn://svn.debian.org/pkg-openssl/openssl-blacklist/
# find openssl-blacklist/trunk/blacklists/ -iname "*.db" -exec cat {} >> unsorted_blacklist.db \;
# sort -u unsorted_blacklist.db > debian_blacklist.db
$mod_sha1sum = sha1("Modulus=" . strtoupper(bin2hex($bin_modulus)) . "\n");
$blacklist_file = fopen('inc/debian_blacklist.db', 'r');
$key_in_blacklist = false;
while (($buffer = fgets($blacklist_file)) !== false) {
if (strpos($buffer, $mod_sha1sum) !== false) {
$key_in_blacklist = true;
break;
}
}
fclose($blacklist_file);
if ($key_in_blacklist == true) {
$result["key"]["weak_debian_rsa_key"] = "true";
$result['warning'][] = "Weak debian key found. Remove this key right now and create a new one.";
}
} else {
if (isset($key_details['dsa'])) {
$result["key"]["type"] = "dsa";
$result["key"]["bits"] = $key_details['bits'];
} else {
if (isset($key_details['dh'])) {
$result["key"]["type"] = "dh";
$result["key"]["bits"] = $key_details['bits'];
} else {
if (isset($key_details['ec'])) {
$result["key"]["type"] = "ecdsa";
$result["key"]["bits"] = $key_details['bits'];
} else {
$result["key"]["type"] = "unknown";
$result["key"]["bits"] = $key_details['bits'];
}
}
}
}
// signature algorithm
$result["key"]["signature_algorithm"] = cert_signature_algorithm($raw_cert_data);
if ($result["key"]["signature_algorithm"] == "sha1WithRSAEncryption") {
$result['warning'][] = "SHA-1 certificate. Upgrade (re-issue) to SHA-256 or better.";
}
if (isset($export_pem)) {
$result["key"]["certificate_pem"] = $export_pem;
}
if (isset($key_details['key'])) {
$result["key"]["public_key_pem"] = $key_details['key'];
$result["key"]["spki_hash"] = spki_hash($export_pem);
}
return $result;
}