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salmon protocol changes magicsig draft-experimental, fixes to hostxrd

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Friendika 2011-08-04 22:37:45 -07:00
commit 2abcf76ec1
6 changed files with 51 additions and 18 deletions
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19
mod/salmon.php
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@ -72,12 +72,16 @@ function salmon_post(&$a) {
$encoding = $base->encoding;
$alg = $base->alg;
// If we're talking to status.net or one of their ilk, they aren't following the magic envelope spec
// and only signed the data element. We'll be nice and let them validate anyway.
// Salmon magic signatures have evolved and there is no way of knowing ahead of time which
// flavour we have. We'll try and verify it regardless.
$stnet_signed_data = $data;
$signed_data = $data . '.' . base64url_encode($type) . '.' . base64url_encode($encoding) . '.' . base64url_encode($alg);
$compliant_format = str_replace('=','',$signed_data);
// decode the data
$data = base64url_decode($data);
@ -150,13 +154,16 @@ function salmon_post(&$a) {
$rsa->exponent = new Math_BigInteger($e, 256);
// We should have everything we need now. Let's see if it verifies.
// If it fails with the proper data format, try again using just the data
// (e.g. status.net)
$verify = $rsa->verify($signed_data,$signature);
$verify = $rsa->verify($compliant_format,$signature);
if(! $verify) {
logger('mod-salmon: message did not verify using protocol. Trying statusnet hack.');
logger('mod-salmon: message did not verify using protocol. Trying padding hack.');
$verify = $rsa->verify($signed_data,$signature);
}
if(! $verify) {
logger('mod-salmon: message did not verify using padding. Trying old statusnet hack.');
$verify = $rsa->verify($stnet_signed_data,$signature);
}