1 files changed, 25 insertions, 0 deletions
diff --git a/verify.php b/verify.php
new file mode 100644
index 0000000..797dae3
--- /dev/null
+++ b/verify.php
@@ -0,0 +1,25 @@
+<?php
+
+$fp = fopen("subdap-oberon.pem", "r");
+$pubd = fread($fp, 262144);
+fclose($fp);
+
+$pub = openssl_get_publickey($pubd);
+
+$args = array();
+foreach (explode('&', $argv[1]) as $parm) {
+	$s = split('=', $parm);
+	$args[$s[0]] = $s[1];
+}
+
+$sig = $args['sig'];
+$sig = str_replace('-', '+', $sig);
+$sig = str_replace('_', '/', $sig);
+$sig = base64_decode($sig, true);
+
+$data = sprintf("%s:%d:%s", $args['site'], $args['ts'], $args['user']);
+if (openssl_verify($data, $sig, $pub, "SHA256")) {
+	printf("OK: site=%s ts=%s user=%s\n", $args['site'], $args['ts'], $args['user']);
+} else {
+	print "verify failed\n";
+}