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-rw-r--r--mod/receive.php9
1 files changed, 6 insertions, 3 deletions
diff --git a/mod/receive.php b/mod/receive.php
index 188f55f21..f5a2eb7b6 100644
--- a/mod/receive.php
+++ b/mod/receive.php
@@ -194,7 +194,7 @@ function receive_post(&$a) {
logger('mod-diaspora: Fetching key for ' . $author_link );
-// Get diaspora public key (pkcs#1) and convert to pkcs#8
+ // Get diaspora public key (pkcs#1) and convert to pkcs#8
$key = get_diaspora_key($author_link);
if(! $key) {
@@ -202,14 +202,17 @@ function receive_post(&$a) {
receive_return(400);
}
+ $verify = false;
if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
$verify = openssl_verify($signed_data,$signature,$key,'sha256');
}
else {
- // FIXME
// fallback sha256 verify for PHP < 5.3
-
+ $rawsig = '';
+ $hash = hash('sha256',$signed_data,true);
+ openssl_public_decrypt($signature,$rawsig,$key);
+ $verify = (($rawsig && substr($rawsig,-32) === $hash) ? true : false);
}
if(! $verify) {