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Fix counter comp algo

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This commit is contained in:
Paul Chen 2008-09-22 20:42:19 +00:00
parent ef82bfbc85
commit 14808c0952
1 changed files with 5 additions and 5 deletions
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10
verifyOTP.php
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@ -62,9 +62,9 @@ if (strlen($decoded_token["public_id"]) == 12 ) {
// Sanity check the OTP
//
if ( strlen($decoded_token["token"]) == 32) {
debug("OTP len OK (".$decoded_token["token"].")");
} else { die(" OTP len FAILED,".strlen($decoded_token["token"])); }
if ( strlen($decoded_token["token"]) != 32) {
die("Wrong OTP length,".strlen($decoded_token["token"]));
}
// Check the session counter
//
@ -74,7 +74,7 @@ $scDiff = $seenSessionCounter - $sessionCounter;
if ($scDiff > 0) {
die("Replayed session counter=".$sessionCounter.', seen='.$seenSessionCounter);
} else {
debug("Counter OK (".$sessionCounter.")");
debug("Session counter OK (".$sessionCounter.")");
}
$hi = $decoded_token["high"]; // From the req
@ -89,7 +89,7 @@ if ($scDiff == 0 && $hiDiff > 0) {
$lo = $decoded_token["low"]; // From the req
$seenLo = $ad['low']; // From DB
$loDiff = $seenLo - $lo;
if ($scDiff == 0 && $loDiff >= 0) {
if ($scDiff == 0 && $hiDiff == 0 && $loDiff >= 0) {
die("Replayed low counter=".$lo.', seen='.$seenLo);
} else {
debug("Low counter OK (".$lo.")");