/**
* auth.php
*
- * Copyright (c) 1999-2002 The SquirrelMail Project Team
+ * Copyright (c) 1999-2003 The SquirrelMail Project Team
* Licensed under the GNU GPL. For full terms see the file COPYING.
*
* Contains functions used to do authentication.
}
if (! isset($imap_auth_mech)) {
- $imap_auth_mech = 'plain';
+ $imap_auth_mech = 'login';
}
if (! isset($use_imap_tls)) {
if (!sqsession_is_registered('session_expired_location')) {
sqsession_register($session_expired_location,'session_expired_location');
}
- include_once( '../functions/display_messages.php' );
+ include_once( SM_PATH . 'functions/display_messages.php' );
logout_error( _("You must be logged in to access this page.") );
exit;
}
/* Given the challenge from the server, supply the response using
cram-md5 (See RFC 2195 for details)
- NOTE: Requires mhash extension to PHP
*/
$challenge=base64_decode($challenge);
-$hash=bin2hex(mhash(MHASH_MD5,$challenge,$password));
+$hash=bin2hex(hmac_md5($challenge,$password));
$response=base64_encode($username . " " . $hash) . "\r\n";
return $response;
}
$result=digest_md5_parse_challenge($challenge);
// verify server supports qop=auth
- $qop = explode(",",$result['qop']);
+ // $qop = explode(",",$result['qop']);
//if (!in_array("auth",$qop)) {
// rfc2831: client MUST fail if no qop methods supported
// return false;
//}
- $cnonce = base64_encode(bin2hex(mhash(MHASH_MD5, microtime())));
+ $cnonce = base64_encode(bin2hex(hmac_md5(microtime())));
$ncount = "00000001";
/* This can be auth (authentication only), auth-int (integrity protection), or
$string_a1 = utf8_encode($username).":";
$string_a1 .= utf8_encode($result['realm']).":";
$string_a1 .= utf8_encode($password);
- $string_a1 = mhash(MHASH_MD5, $string_a1);
+ $string_a1 = hmac_md5($string_a1);
$A1 = $string_a1 . ":" . $result['nonce'] . ":" . $cnonce;
- $A1 = bin2hex(mhash(MHASH_MD5, $A1));
+ $A1 = bin2hex(hmac_md5($A1));
$A2 = "AUTHENTICATE:$digest_uri_value";
// If qop is auth-int or auth-conf, A2 gets a little extra
if ($qop_value != 'auth') {
$A2 .= ':00000000000000000000000000000000';
}
- $A2 = bin2hex(mhash(MHASH_MD5, $A2));
+ $A2 = bin2hex(hmac_md5($A2));
$string_response = $result['nonce'] . ':' . $ncount . ':' . $cnonce . ':' . $qop_value;
- $response_value = bin2hex(mhash(MHASH_MD5, $A1.":".$string_response.":".$A2));
+ $response_value = bin2hex(hmac_md5($A1.":".$string_response.":".$A2));
$reply = 'charset=utf-8,username="' . $username . '",realm="' . $result["realm"] . '",';
$reply .= 'nonce="' . $result['nonce'] . '",nc=' . $ncount . ',cnonce="' . $cnonce . '",';
returns an array. See the RFC for details on what's in the challenge string.
*/
$challenge=base64_decode($challenge);
- while (strlen($challenge)) {
+ while (isset($challenge)) {
if ($challenge{0} == ',') { // First char is a comma, must not be 1st time through loop
$challenge=substr($challenge,1);
}
} else {
// We're in a "simple" value - explode to next comma
$val=explode(',',$challenge,2);
- $challenge=$val[1];
+ if (isset($val[1])) {
+ $challenge=$val[1];
+ } else {
+ unset($challenge);
+ }
$value=$val[0];
}
$parsed["$key"]=$value;
return $parsed;
}
+function hmac_md5($data, $key='') {
+ // Creates a HMAC digest that can be used for auth purposes
+ // See RFCs 2104, 2617, 2831
+ // Uses mhash() extension if available
+ if (extension_loaded('mhash')) {
+ if ($key== '') {
+ $mhash=mhash(MHASH_MD5,$data);
+ } else {
+ $mhash=mhash(MHASH_MD5,$data,$key);
+ }
+ return $mhash;
+ }
+ if (!$key) {
+ return pack('H*',md5($data));
+ }
+ $key = str_pad($key,64,chr(0x00));
+ if (strlen($key) > 64) {
+ $key = pack("H*",md5($key));
+ }
+ $k_ipad = $key ^ str_repeat(chr(0x36), 64) ;
+ $k_opad = $key ^ str_repeat(chr(0x5c), 64) ;
+ /* Heh, let's get recursive. */
+ $hmac=hmac_md5($k_opad . pack("H*",md5($k_ipad . $data)) );
+ return $hmac;
+}
+
?>