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-rw-r--r--plugins/OStatus/lib/magicenvelope.php174
-rw-r--r--plugins/OStatus/lib/magicsig.php159
2 files changed, 333 insertions, 0 deletions
diff --git a/plugins/OStatus/lib/magicenvelope.php b/plugins/OStatus/lib/magicenvelope.php
new file mode 100644
index 000000000..1ae80d70c
--- /dev/null
+++ b/plugins/OStatus/lib/magicenvelope.php
@@ -0,0 +1,174 @@
+<?php
+/**
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * A sample module to show best practices for StatusNet plugins
+ *
+ * PHP version 5
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @package StatusNet
+ * @author James Walker <james@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link http://status.net/
+ */
+
+require_once 'magicsig.php';
+
+class MagicEnvelope
+{
+ const ENCODING = 'base64url';
+
+ const NS = 'http://salmon-protocol.org/ns/magic-env';
+
+ private function normalizeUser($user_id)
+ {
+ if (substr($user_id, 0, 5) == 'http:' ||
+ substr($user_id, 0, 6) == 'https:' ||
+ substr($user_id, 0, 5) == 'acct:') {
+ return $user_id;
+ }
+
+ if (strpos($user_id, '@') !== FALSE) {
+ return 'acct:' . $user_id;
+ }
+
+ return 'http://' . $user_id;
+ }
+
+ public function getKeyPair($signer_uri)
+ {
+ return 'RSA.79_L2gq-TD72Nsb5yGS0r9stLLpJZF5AHXyxzWmQmlqKl276LEJEs8CppcerLcR90MbYQUwt-SX9slx40Yq3vA==.AQAB.AR-jo5KMfSISmDAT2iMs2_vNFgWRjl5rbJVvA0SpGIEWyPdCGxlPtCbTexp8-0ZEIe8a4SyjatBECH5hxgMTpw==';
+ }
+
+
+ public function signMessage($text, $mimetype, $signer_uri)
+ {
+ $signer_uri = $this->normalizeUser($signer_uri);
+
+ if (!$this->checkAuthor($text, $signer_uri)) {
+ return false;
+ }
+
+ $signature_alg = new MagicsigRsaSha256($this->getKeyPair($signer_uri));
+ $armored_text = base64_encode($text);
+
+ return array(
+ 'data' => $armored_text,
+ 'encoding' => MagicEnvelope::ENCODING,
+ 'data_type' => $mimetype,
+ 'sig' => $signature_alg->sign($armored_text),
+ 'alg' => $signature_alg->getName()
+ );
+
+
+ }
+
+ public function unfold($env)
+ {
+ $dom = new DOMDocument();
+ $dom->loadXML(base64_decode($env['data']));
+
+ if ($dom->documentElement->tagName != 'entry') {
+ return false;
+ }
+
+ $prov = $dom->createElementNS(MagicEnvelope::NS, 'me:provenance');
+ $prov->setAttribute('xmlns:me', MagicEnvelope::NS);
+ $data = $dom->createElementNS(MagicEnvelope::NS, 'me:data', $env['data']);
+ $data->setAttribute('type', $env['data_type']);
+ $prov->appendChild($data);
+ $enc = $dom->createElementNS(MagicEnvelope::NS, 'me:encoding', $env['encoding']);
+ $prov->appendChild($enc);
+ $alg = $dom->createElementNS(MagicEnvelope::NS, 'me:alg', $env['alg']);
+ $prov->appendChild($alg);
+ $sig = $dom->createElementNS(MagicEnvelope::NS, 'me:sig', $env['sig']);
+ $prov->appendChild($sig);
+
+ $dom->documentElement->appendChild($prov);
+
+ return $dom->saveXML();
+ }
+
+ public function getAuthor($text) {
+ $doc = new DOMDocument();
+ if (!$doc->loadXML($text)) {
+ return FALSE;
+ }
+
+ if ($doc->documentElement->tagName == 'entry') {
+ $authors = $doc->documentElement->getElementsByTagName('author');
+ foreach ($authors as $author) {
+ $uris = $author->getElementsByTagName('uri');
+ foreach ($uris as $uri) {
+ return $this->normalizeUser($uri->nodeValue);
+ }
+ }
+ }
+ }
+
+ public function checkAuthor($text, $signer_uri)
+ {
+ return ($this->getAuthor($text) == $signer_uri);
+ }
+
+ public function verify($env)
+ {
+ if ($env['alg'] != 'RSA-SHA256') {
+ return false;
+ }
+
+ if ($env['encoding'] != MagicEnvelope::ENCODING) {
+ return false;
+ }
+
+ $text = base64_decode($env['data']);
+ $signer_uri = $this->getAuthor($text);
+
+ $verifier = new MagicsigRsaSha256($this->getKeyPair($signer_uri));
+
+ return $verifier->verify($env['data'], $env['sig']);
+ }
+
+ public function parse($text)
+ {
+ $dom = DOMDocument::loadXML($text);
+ return $this->fromDom($dom);
+ }
+
+ public function fromDom($dom)
+ {
+ if ($dom->documentElement->tagName == 'entry') {
+ $env_element = $dom->getElementsByTagNameNS(MagicEnvelope::NS, 'provenance')->item(0);
+ } else if ($dom->documentElement->tagName == 'me:env') {
+ $env_element = $dom->documentElement;
+ } else {
+ return false;
+ }
+
+ $data_element = $env_element->getElementsByTagNameNS(MagicEnvelope::NS, 'data')->item(0);
+
+ return array(
+ 'data' => trim($data_element->nodeValue),
+ 'data_type' => $data_element->getAttribute('type'),
+ 'encoding' => $env_element->getElementsByTagNameNS(MagicEnvelope::NS, 'encoding')->item(0)->nodeValue,
+ 'alg' => $env_element->getElementsByTagNameNS(MagicEnvelope::NS, 'alg')->item(0)->nodeValue,
+ 'sig' => $env_element->getElementsByTagNameNS(MagicEnvelope::NS, 'sig')->item(0)->nodeValue,
+ );
+ }
+
+}
diff --git a/plugins/OStatus/lib/magicsig.php b/plugins/OStatus/lib/magicsig.php
new file mode 100644
index 000000000..af65bad04
--- /dev/null
+++ b/plugins/OStatus/lib/magicsig.php
@@ -0,0 +1,159 @@
+<?php
+/**
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * A sample module to show best practices for StatusNet plugins
+ *
+ * PHP version 5
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @package StatusNet
+ * @author James Walker <james@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link http://status.net/
+ */
+
+require_once 'Crypt/RSA.php';
+
+interface Magicsig
+{
+
+ public function sign($bytes);
+
+ public function verify($signed, $signature_b64);
+}
+
+class MagicsigRsaSha256
+{
+
+ public $keypair;
+
+ public function __construct($init = null)
+ {
+ if (is_null($init)) {
+ $this->generate();
+ } else {
+ $this->fromString($init);
+ }
+ }
+
+
+ public function generate($key_length = 512)
+ {
+ $keypair = new Crypt_RSA_KeyPair($key_length);
+ $params['public_key'] = $keypair->getPublicKey();
+ $params['private_key'] = $keypair->getPrivateKey();
+
+ $this->keypair = new Crypt_RSA($params);
+ }
+
+
+ public function toString($full_pair = true)
+ {
+ $public_key = $this->keypair->_public_key;
+ $private_key = $this->keypair->_private_key;
+
+ $mod = base64_url_encode($public_key->getModulus());
+ $exp = base64_url_encode($public_key->getExponent());
+ $private_exp = '';
+ if ($full_pair && $private_key->getExponent()) {
+ $private_exp = '.' . base64_url_encode($private_key->getExponent());
+ }
+
+ return 'RSA.' . $mod . '.' . $exp . $private_exp;
+ }
+
+ public function fromString($text)
+ {
+ // remove whitespace
+ $text = preg_replace('/\s+/', '', $text);
+
+ // parse components
+ if (!preg_match('/RSA\.([^\.]+)\.([^\.]+)(.([^\.]+))?/', $text, $matches)) {
+ return false;
+ }
+
+
+ $mod = base64_url_decode($matches[1]);
+ $exp = base64_url_decode($matches[2]);
+ if ($matches[4]) {
+ $private_exp = base64_url_decode($matches[4]);
+ }
+
+ $params['public_key'] = new Crypt_RSA_KEY($mod, $exp, 'public');
+ if ($params['public_key']->isError()) {
+ $error = $params['public_key']->getLastError();
+ print $error->getMessage();
+ exit;
+ }
+ if ($private_exp) {
+ $params['private_key'] = new Crypt_RSA_KEY($mod, $private_exp, 'private');
+ if ($params['private_key']->isError()) {
+ $error = $params['private_key']->getLastError();
+ print $error->getMessage();
+ exit;
+ }
+ }
+
+ $this->keypair = new Crypt_RSA($params);
+ }
+
+ public function getName()
+ {
+ return 'RSA-SHA256';
+ }
+
+ public function sign($bytes)
+ {
+ $sig = $this->keypair->createSign($bytes, null, 'sha256');
+ if ($this->keypair->isError()) {
+ $error = $this->keypair->getLastError();
+ common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
+ }
+
+ return $sig;
+ }
+
+ public function verify($signed_bytes, $signature)
+ {
+ $result = $this->keypair->validateSign($signed_bytes, $signature, null, 'sha256');
+ if ($this->keypair->isError()) {
+ $error = $this->keypair->getLastError();
+ //common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
+ print $error->getMessage();
+ }
+ return $result;
+ }
+
+}
+
+// Define a sha256 function for hashing
+// (Crypt_RSA should really be updated to use hash() )
+function sha256($bytes)
+{
+ return hash('sha256', $bytes);
+}
+
+function base64_url_encode($input)
+{
+ return strtr(base64_encode($input), '+/', '-_');
+}
+
+function base64_url_decode($input)
+{
+ return base64_decode(strtr($input, '-_', '+/'));
+} \ No newline at end of file
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-22 03:52:58 +0000