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Update AP helpers

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Daniel Supernault 2024-08-02 01:40:06 -06:00
parent 9847fbd898
commit 8fea821504
No known key found for this signature in database
GPG key ID: 23740873EE6F76A1
2 changed files with 193 additions and 160 deletions
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88
app/Util/ActivityPub/Helpers.php
View file

@ -25,6 +25,8 @@ use Cache;
use Carbon\Carbon; use Carbon\Carbon;
use Illuminate\Support\Str; use Illuminate\Support\Str;
use Illuminate\Validation\Rule; use Illuminate\Validation\Rule;
use League\Uri\Exceptions\UriException;
use League\Uri\Uri;
use Purify; use Purify;
use Validator; use Validator;
@ -153,61 +155,74 @@ class Helpers
return in_array($url, $audience['to']) || in_array($url, $audience['cc']); return in_array($url, $audience['to']) || in_array($url, $audience['cc']);
} }
public static function validateUrl($url) public static function validateUrl($url = null, $disableDNSCheck = false)
{ {
if (is_array($url)) { if (is_array($url) && ! empty($url)) {
$url = $url[0]; $url = $url[0];
} }
if (! $url || strlen($url) === 0) {
return false;
}
try {
$uri = Uri::new($url);
$hash = hash('sha256', $url); if (! $uri) {
$key = "helpers:url:valid:sha256-{$hash}"; return false;
}
if ($uri->getScheme() !== 'https') {
return false;
}
$host = $uri->getHost();
if (! $host || $host === '') {
return false;
}
if (! filter_var($host, FILTER_VALIDATE_DOMAIN, FILTER_FLAG_HOSTNAME)) {
return false;
}
if (! str_contains($host, '.')) {
return false;
}
$valid = Cache::remember($key, 900, function () use ($url) {
$localhosts = [ $localhosts = [
'127.0.0.1', 'localhost', '::1', 'localhost',
'127.0.0.1',
'::1',
'broadcasthost',
'ip6-localhost',
'ip6-loopback',
]; ];
if (strtolower(mb_substr($url, 0, 8)) !== 'https://') {
return false;
}
if (substr_count($url, '://') !== 1) {
return false;
}
if (mb_substr($url, 0, 8) !== 'https://') {
$url = 'https://'.substr($url, 8);
}
$valid = filter_var($url, FILTER_VALIDATE_URL);
if (! $valid) {
return false;
}
$host = parse_url($valid, PHP_URL_HOST);
if (in_array($host, $localhosts)) { if (in_array($host, $localhosts)) {
return false; return false;
} }
if (config('security.url.verify_dns')) { if ($disableDNSCheck !== true && app()->environment() === 'production' && (bool) config('security.url.verify_dns')) {
if (DomainService::hasValidDns($host) === false) { $hash = hash('sha256', $host);
$key = "helpers:url:valid-dns:sha256-{$hash}";
$domainValidDns = Cache::remember($key, 14440, function () use ($host) {
return DomainService::hasValidDns($host);
});
if (! $domainValidDns) {
return false; return false;
} }
} }
if (app()->environment() === 'production') { if ($disableDNSCheck !== true && app()->environment() === 'production') {
$bannedInstances = InstanceService::getBannedDomains(); $bannedInstances = InstanceService::getBannedDomains();
if (in_array($host, $bannedInstances)) { if (in_array($host, $bannedInstances)) {
return false; return false;
} }
} }
return $url; return $uri->toString();
}); } catch (UriException $e) {
return false;
return $valid; }
} }
public static function validateLocalUrl($url) public static function validateLocalUrl($url)
@ -215,7 +230,12 @@ class Helpers
$url = self::validateUrl($url); $url = self::validateUrl($url);
if ($url == true) { if ($url == true) {
$domain = config('pixelfed.domain.app'); $domain = config('pixelfed.domain.app');
$host = parse_url($url, PHP_URL_HOST);
$uri = Uri::new($url);
$host = $uri->getHost();
if (! $host || empty($host)) {
return false;
}
$url = strtolower($domain) === strtolower($host) ? $url : false; $url = strtolower($domain) === strtolower($host) ? $url : false;
return $url; return $url;

265
app/Util/ActivityPub/HttpSignature.php
View file

@ -2,146 +2,159 @@
namespace App\Util\ActivityPub; namespace App\Util\ActivityPub;
use Cache, Log;
use App\Models\InstanceActor; use App\Models\InstanceActor;
use App\Profile; use App\Profile;
use \DateTime; use Cache;
use DateTime;
class HttpSignature { class HttpSignature
{
/*
* source: https://github.com/aaronpk/Nautilus/blob/master/app/ActivityPub/HTTPSignature.php
* thanks aaronpk!
*/
/* public static function sign(Profile $profile, $url, $body = false, $addlHeaders = [])
* source: https://github.com/aaronpk/Nautilus/blob/master/app/ActivityPub/HTTPSignature.php {
* thanks aaronpk! if ($body) {
*/ $digest = self::_digest($body);
}
$user = $profile;
$headers = self::_headersToSign($url, $body ? $digest : false);
$headers = array_merge($headers, $addlHeaders);
$stringToSign = self::_headersToSigningString($headers);
$signedHeaders = implode(' ', array_map('strtolower', array_keys($headers)));
$key = openssl_pkey_get_private($user->private_key);
openssl_sign($stringToSign, $signature, $key, OPENSSL_ALGO_SHA256);
$signature = base64_encode($signature);
$signatureHeader = 'keyId="'.$user->keyId().'",headers="'.$signedHeaders.'",algorithm="rsa-sha256",signature="'.$signature.'"';
unset($headers['(request-target)']);
$headers['Signature'] = $signatureHeader;
public static function sign(Profile $profile, $url, $body = false, $addlHeaders = []) { return self::_headersToCurlArray($headers);
if($body) {
$digest = self::_digest($body);
}
$user = $profile;
$headers = self::_headersToSign($url, $body ? $digest : false);
$headers = array_merge($headers, $addlHeaders);
$stringToSign = self::_headersToSigningString($headers);
$signedHeaders = implode(' ', array_map('strtolower', array_keys($headers)));
$key = openssl_pkey_get_private($user->private_key);
openssl_sign($stringToSign, $signature, $key, OPENSSL_ALGO_SHA256);
$signature = base64_encode($signature);
$signatureHeader = 'keyId="'.$user->keyId().'",headers="'.$signedHeaders.'",algorithm="rsa-sha256",signature="'.$signature.'"';
unset($headers['(request-target)']);
$headers['Signature'] = $signatureHeader;
return self::_headersToCurlArray($headers);
}
public static function instanceActorSign($url, $body = false, $addlHeaders = [], $method = 'post')
{
$keyId = config('app.url') . '/i/actor#main-key';
$privateKey = Cache::rememberForever(InstanceActor::PKI_PRIVATE, function() {
return InstanceActor::first()->private_key;
});
if($body) {
$digest = self::_digest($body);
}
$headers = self::_headersToSign($url, $body ? $digest : false, $method);
$headers = array_merge($headers, $addlHeaders);
$stringToSign = self::_headersToSigningString($headers);
$signedHeaders = implode(' ', array_map('strtolower', array_keys($headers)));
$key = openssl_pkey_get_private($privateKey);
openssl_sign($stringToSign, $signature, $key, OPENSSL_ALGO_SHA256);
$signature = base64_encode($signature);
$signatureHeader = 'keyId="'.$keyId.'",headers="'.$signedHeaders.'",algorithm="rsa-sha256",signature="'.$signature.'"';
unset($headers['(request-target)']);
$headers['Signature'] = $signatureHeader;
return $headers;
}
public static function parseSignatureHeader($signature) {
$parts = explode(',', $signature);
$signatureData = [];
foreach($parts as $part) {
if(preg_match('/(.+)="(.+)"/', $part, $match)) {
$signatureData[$match[1]] = $match[2];
}
} }
if(!isset($signatureData['keyId'])) { public static function instanceActorSign($url, $body = false, $addlHeaders = [], $method = 'post')
return [ {
'error' => 'No keyId was found in the signature header. Found: '.implode(', ', array_keys($signatureData)) $keyId = config('app.url').'/i/actor#main-key';
]; $privateKey = Cache::rememberForever(InstanceActor::PKI_PRIVATE, function () {
return InstanceActor::first()->private_key;
});
if ($body) {
$digest = self::_digest($body);
}
$headers = self::_headersToSign($url, $body ? $digest : false, $method);
$headers = array_merge($headers, $addlHeaders);
$stringToSign = self::_headersToSigningString($headers);
$signedHeaders = implode(' ', array_map('strtolower', array_keys($headers)));
$key = openssl_pkey_get_private($privateKey);
openssl_sign($stringToSign, $signature, $key, OPENSSL_ALGO_SHA256);
$signature = base64_encode($signature);
$signatureHeader = 'keyId="'.$keyId.'",headers="'.$signedHeaders.'",algorithm="rsa-sha256",signature="'.$signature.'"';
unset($headers['(request-target)']);
$headers['Signature'] = $signatureHeader;
return $headers;
} }
if(!filter_var($signatureData['keyId'], FILTER_VALIDATE_URL)) { public static function parseSignatureHeader($signature)
return [ {
'error' => 'keyId is not a URL: '.$signatureData['keyId'] $parts = explode(',', $signature);
]; $signatureData = [];
foreach ($parts as $part) {
if (preg_match('/(.+)="(.+)"/', $part, $match)) {
$signatureData[$match[1]] = $match[2];
}
}
if (! isset($signatureData['keyId'])) {
return [
'error' => 'No keyId was found in the signature header. Found: '.implode(', ', array_keys($signatureData)),
];
}
if (! filter_var($signatureData['keyId'], FILTER_VALIDATE_URL)) {
return [
'error' => 'keyId is not a URL: '.$signatureData['keyId'],
];
}
if (! Helpers::validateUrl($signatureData['keyId'])) {
return [
'error' => 'keyId is not a URL: '.$signatureData['keyId'],
];
}
if (! isset($signatureData['headers']) || ! isset($signatureData['signature'])) {
return [
'error' => 'Signature is missing headers or signature parts',
];
}
return $signatureData;
} }
if(!isset($signatureData['headers']) || !isset($signatureData['signature'])) { public static function verify($publicKey, $signatureData, $inputHeaders, $path, $body)
return [ {
'error' => 'Signature is missing headers or signature parts' $digest = 'SHA-256='.base64_encode(hash('sha256', $body, true));
]; $headersToSign = [];
foreach (explode(' ', $signatureData['headers']) as $h) {
if ($h == '(request-target)') {
$headersToSign[$h] = 'post '.$path;
} elseif ($h == 'digest') {
$headersToSign[$h] = $digest;
} elseif (isset($inputHeaders[$h][0])) {
$headersToSign[$h] = $inputHeaders[$h][0];
}
}
$signingString = self::_headersToSigningString($headersToSign);
$verified = openssl_verify($signingString, base64_decode($signatureData['signature']), $publicKey, OPENSSL_ALGO_SHA256);
return [$verified, $signingString];
} }
return $signatureData; private static function _headersToSigningString($headers)
} {
return implode("\n", array_map(function ($k, $v) {
public static function verify($publicKey, $signatureData, $inputHeaders, $path, $body) { return strtolower($k).': '.$v;
$digest = 'SHA-256='.base64_encode(hash('sha256', $body, true)); }, array_keys($headers), $headers));
$headersToSign = [];
foreach(explode(' ',$signatureData['headers']) as $h) {
if($h == '(request-target)') {
$headersToSign[$h] = 'post '.$path;
} elseif($h == 'digest') {
$headersToSign[$h] = $digest;
} elseif(isset($inputHeaders[$h][0])) {
$headersToSign[$h] = $inputHeaders[$h][0];
}
}
$signingString = self::_headersToSigningString($headersToSign);
$verified = openssl_verify($signingString, base64_decode($signatureData['signature']), $publicKey, OPENSSL_ALGO_SHA256);
return [$verified, $signingString];
}
private static function _headersToSigningString($headers) {
return implode("\n", array_map(function($k, $v){
return strtolower($k).': '.$v;
}, array_keys($headers), $headers));
}
private static function _headersToCurlArray($headers) {
return array_map(function($k, $v){
return "$k: $v";
}, array_keys($headers), $headers);
}
private static function _digest($body) {
if(is_array($body)) {
$body = json_encode($body);
}
return base64_encode(hash('sha256', $body, true));
}
protected static function _headersToSign($url, $digest = false, $method = 'post') {
$date = new DateTime('UTC');
if(!in_array($method, ['post', 'get'])) {
throw new \Exception('Invalid method used to sign headers in HttpSignature');
}
$headers = [
'(request-target)' => $method . ' '.parse_url($url, PHP_URL_PATH),
'Host' => parse_url($url, PHP_URL_HOST),
'Date' => $date->format('D, d M Y H:i:s \G\M\T'),
];
if($digest) {
$headers['Digest'] = 'SHA-256='.$digest;
} }
return $headers; private static function _headersToCurlArray($headers)
} {
return array_map(function ($k, $v) {
return "$k: $v";
}, array_keys($headers), $headers);
}
private static function _digest($body)
{
if (is_array($body)) {
$body = json_encode($body);
}
return base64_encode(hash('sha256', $body, true));
}
protected static function _headersToSign($url, $digest = false, $method = 'post')
{
$date = new DateTime('UTC');
if (! in_array($method, ['post', 'get'])) {
throw new \Exception('Invalid method used to sign headers in HttpSignature');
}
$headers = [
'(request-target)' => $method.' '.parse_url($url, PHP_URL_PATH),
'Host' => parse_url($url, PHP_URL_HOST),
'Date' => $date->format('D, d M Y H:i:s \G\M\T'),
];
if ($digest) {
$headers['Digest'] = 'SHA-256='.$digest;
}
return $headers;
}
} }