bitPickups/friendica_2021.01_tupambae_shared_hosting
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crypto stuff

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This commit is contained in:
Friendika 2011-08-09 18:55:46 -07:00
commit 1bfe1283aa
10 changed files with 102 additions and 90 deletions
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44
mod/salmon.php
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@ -5,6 +5,7 @@
// complicated process to try and sort out.
require_once('include/salmon.php');
require_once('include/crypto.php');
require_once('library/simplepie/simplepie.inc');
function salmon_return($val) {
@ -33,7 +34,7 @@ function salmon_post(&$a) {
dbesc($nick)
);
if(! count($r))
salmon_return(500);
http_status_exit(500);
$importer = $r[0];
@ -52,7 +53,7 @@ function salmon_post(&$a) {
if(! $base) {
logger('mod-salmon: unable to locate salmon data in xml ');
salmon_return(400);
http_status_exit(400);
}
// Stash the signature away for now. We have to find their key or it won't be good for anything.
@ -117,7 +118,7 @@ function salmon_post(&$a) {
if(! $author_link) {
logger('mod-salmon: Could not retrieve author URI.');
salmon_return(400);
http_status_exit(400);
}
// Once we have the author URI, go to the web and try to find their public key
@ -129,54 +130,35 @@ function salmon_post(&$a) {
if(! $key) {
logger('mod-salmon: Could not retrieve author key.');
salmon_return(400);
http_status_exit(400);
}
// Setup RSA stuff to verify the signature
require_once('library/phpsec/Crypt/RSA.php');
$rsa = new CRYPT_RSA();
$rsa->signatureMode = CRYPT_RSA_SIGNATURE_PKCS1;
$rsa->setHash('sha256');
$rsa->loadKey($prvkey);
$sig = $rsa->sign($data);
require_once('library/phpsec/Crypt/RSA.php');
$key_info = explode('.',$key);
$m = base64url_decode($key_info[1]);
$e = base64url_decode($key_info[2]);
logger('mod-salmon: key details: ' . print_r($key_info,true));
logger('mod-salmon: key details: ' . print_r($key_info,true), LOGGER_DEBUG);
$rsa = new CRYPT_RSA();
$rsa->signatureMode = CRYPT_RSA_SIGNATURE_PKCS1;
$rsa->setHash('sha256');
$rsa->modulus = new Math_BigInteger($m, 256);
$rsa->k = strlen($rsa->modulus->toBytes());
$rsa->exponent = new Math_BigInteger($e, 256);
$pubkey = metopem($m,$e);
// We should have everything we need now. Let's see if it verifies.
$verify = $rsa->verify($compliant_format,$signature);
$verify = rsa_verify($compliant_format,$signature,$pubkey);
if(! $verify) {
logger('mod-salmon: message did not verify using protocol. Trying padding hack.');
$verify = $rsa->verify($signed_data,$signature);
$verify = rsa_verify($signed_data,$signature,$pubkey);
}
if(! $verify) {
logger('mod-salmon: message did not verify using padding. Trying old statusnet hack.');
$verify = $rsa->verify($stnet_signed_data,$signature);
$verify = rsa_verify($stnet_signed_data,$signature,$pubkey);
}
if(! $verify) {
logger('mod-salmon: Message did not verify. Discarding.');
salmon_return(400);
http_status_exit(400);
}
logger('mod-salmon: Message verified.');
@ -203,7 +185,7 @@ function salmon_post(&$a) {
if((count($r)) && (($r[0]['readonly']) || ($r[0]['rel'] == CONTACT_IS_FOLLOWER) || ($r[0]['blocked']))) {
logger('mod-salmon: Ignoring this author.');
salmon_return(202);
http_status_exit(202);
// NOTREACHED
}
@ -225,7 +207,7 @@ function salmon_post(&$a) {
consume_feed($feedxml,$importer,$contact_rec,$hub);
salmon_return(200);
http_status_exit(200);
}