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88 lines
3.6 KiB
PHP
88 lines
3.6 KiB
PHP
<?php
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namespace Code\Module;
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use Code\Web\HTTPSig;
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use Code\Web\HTTPHeaders;
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use Code\Lib\Verify;
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use Code\Web\Controller;
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/**
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* OpenWebAuth verifier and token generator
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* See spec/OpenWebAuth/Home.md
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* Requests to this endpoint should be signed using HTTP Signatures
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* using the 'Authorization: Signature' authentication method
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* If the signature verifies a token is returned.
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*
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* This token may be exchanged for an authenticated cookie.
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*/
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class Owa extends Controller
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{
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public function init()
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{
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$ret = ['success' => false];
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$authHeader = (new HTTPHeaders())->getAuthHeader();
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if (str_starts_with(trim($authHeader), 'Signature')) {
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$sigblock = HTTPSig::parse_sigheader($authHeader);
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if ($sigblock) {
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$keyId = $sigblock['keyId'];
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$parsed = parse_url($keyId);
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if (str_starts_with($parsed['scheme'],'http')) {
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unset($parsed['fragment']);
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unset($parsed['query']);
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$keyId = unparse_url($parsed);
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}
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else {
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$keyId = str_replace('acct:', '', $keyId);
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}
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if ($keyId) {
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$r = q(
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"select * from hubloc left join xchan on hubloc_hash = xchan_hash
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where (hubloc_addr = '%s' or hubloc_id_url = '%s' or xchan_hash = '%s')
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and hubloc_deleted = 0 and xchan_pubkey != ''
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ORDER BY hubloc_id desc",
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dbesc($keyId),
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dbesc($keyId),
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dbesc($keyId)
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);
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if (!$r) {
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$found = discover_resource($keyId, verify: false);
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if ($found) {
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$r = q(
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"select * from hubloc left join xchan on hubloc_hash = xchan_hash
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where (hubloc_addr = '%s' or hubloc_id_url = '%s' or xchan_hash = '%s')
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and hubloc_deleted = 0 and xchan_pubkey != ''
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ORDER BY hubloc_id desc",
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dbesc($keyId),
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dbesc($keyId),
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dbesc($keyId)
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);
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}
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}
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if ($r) {
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foreach ($r as $hubloc) {
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$verified = HTTPSig::verify(file_get_contents('php://input'), $hubloc['xchan_pubkey']);
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if ($verified && $verified['header_signed'] && $verified['header_valid'] && ($verified['content_valid'] || (!$verified['content_signed']))) {
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logger('OWA header: ' . print_r($verified, true), LOGGER_DATA);
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logger('OWA success: ' . $hubloc['hubloc_addr'], LOGGER_DATA);
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$ret['success'] = true;
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$token = random_string(32);
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Verify::create('owt', 0, $token, $hubloc['hubloc_addr']);
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$result = '';
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openssl_public_encrypt($token, $result, $hubloc['xchan_pubkey']);
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$ret['encrypted_token'] = base64url_encode($result);
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break;
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} else {
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logger('OWA fail: ' . $hubloc['hubloc_id'] . ' ' . $hubloc['hubloc_addr']);
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}
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}
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}
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}
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}
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}
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json_return_and_die($ret, 'application/x-nomad+json');
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}
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}
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