/**
* auth.php
*
- * Copyright (c) 1999-2002 The SquirrelMail Project Team
+ * Copyright (c) 1999-2004 The SquirrelMail Project Team
* Licensed under the GNU GPL. For full terms see the file COPYING.
*
* Contains functions used to do authentication.
*
- * $Id$
+ * @version $Id$
+ * @package squirrelmail
*/
-/* Put in a safety net here, in case a naughty admin didn't run conf.pl when they upgraded */
+/** Put in a safety net here, in case a naughty admin didn't run conf.pl when they upgraded */
if (! isset($smtp_auth_mech)) {
$smtp_auth_mech = 'none';
}
if (! isset($imap_auth_mech)) {
- $imap_auth_mech = 'plain';
+ $imap_auth_mech = 'login';
}
if (! isset($use_imap_tls)) {
$use_smtp_tls = false;
}
+/**
+ * Check if user has previously logged in to the Squirrelmail session. If user
+ * has not logged in, execution will stop inside this function.
+ *
+ * @return int A positive value is returned if user has previously logged in
+ * successfully.
+ */
function is_logged_in() {
if ( sqsession_is_registered('user_is_logged_in') ) {
return;
} else {
- global $PHP_SELF, $session_expired_post,
- $session_expired_location;
+ global $PHP_SELF, $session_expired_post,
+ $session_expired_location, $squirrelmail_language;
/* First we store some information in the new session to prevent
* information-loss.
*/
-
- $session_expired_post = $_POST;
+
+ $session_expired_post = $_POST;
$session_expired_location = $PHP_SELF;
- if (!sqsession_is_registered('session_expired_post')) {
+ if (!sqsession_is_registered('session_expired_post')) {
sqsession_register($session_expired_post,'session_expired_post');
}
if (!sqsession_is_registered('session_expired_location')) {
sqsession_register($session_expired_location,'session_expired_location');
}
- include_once( '../functions/display_messages.php' );
+ include_once( SM_PATH . 'functions/display_messages.php' );
+ set_up_language($squirrelmail_language, true);
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)
+ *
+ * @param string $username User ID
+ * @param string $password User password supplied by User
+ * @param string $challenge The challenge supplied by the server
+ * @return string The response to be sent to the IMAP server
+ *
+ */
function cram_md5_response ($username,$password,$challenge) {
-
-/* 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,$password));
-$response=base64_encode($username . " " . $hash) . "\r\n";
-return $response;
+ $challenge=base64_decode($challenge);
+ $hash=bin2hex(hmac_md5($challenge,$password));
+ $response=base64_encode($username . " " . $hash) . "\r\n";
+ return $response;
}
+/**
+ * Return Digest-MD5 response.
+ * Given the challenge from the server, calculate and return the
+ * response-string for digest-md5 authentication. (See RFC 2831 for more
+ * details)
+ *
+ * @param string $username User ID
+ * @param string $password User password supplied by User
+ * @param string $challenge The challenge supplied by the server
+ * @param string $service The service name, usually 'imap'; it is used to
+ * define the digest-uri.
+ * @param string $host The host name, usually the server's FQDN; it is used to
+ * define the digest-uri.
+ * @return string The response to be sent to the IMAP server
+ */
function digest_md5_response ($username,$password,$challenge,$service,$host) {
-/* Given the challenge from the server, calculate and return the response-string
- for digest-md5 authentication. (See RFC 2831 for more details) */
$result=digest_md5_parse_challenge($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
auth-conf (confidentiality protection). Right now only auth is supported.
- DO NOT CHANGE THIS VALUE */
+ DO NOT CHANGE THIS VALUE */
$qop_value = "auth";
$digest_uri_value = $service . '/' . $host;
$string_a1 = utf8_encode($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 . '",';
$reply .= ',qop=' . $qop_value;
$reply = base64_encode($reply);
return $reply . "\r\n";
-
+
}
+/**
+ * Parse Digest-MD5 challenge.
+ * This function parses the challenge sent during DIGEST-MD5 authentication and
+ * returns an array. See the RFC for details on what's in the challenge string.
+ *
+ * @param string $challenge Digest-MD5 Challenge
+ * @return array Digest-MD5 challenge decoded data
+ */
function digest_md5_parse_challenge($challenge) {
-/* This function parses the challenge sent during DIGEST-MD5 authentication and
- 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;
}
-?>
+/**
+ * Creates a HMAC digest that can be used for auth purposes
+ * See RFCs 2104, 2617, 2831
+ * Uses mhash() extension if available
+ *
+ * @param string $data Data to apply hash function to.
+ * @param string $key Optional key, which, if supplied, will be used to
+ * calculate data's HMAC.
+ * @return string HMAC Digest string
+ */
+function hmac_md5($data, $key='') {
+ if (extension_loaded('mhash')) {
+ if ($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;
+}
+
+/**
+ * Fillin user and password based on SMTP auth settings.
+ *
+ * @param string $user Reference to SMTP username
+ * @param string $pass Reference to SMTP password (unencrypted)
+ */
+function get_smtp_user(&$user, &$pass) {
+ global $username, $smtp_auth_mech,
+ $smtp_sitewide_user, $smtp_sitewide_pass;
+
+ if ($smtp_auth_mech == 'none') {
+ $user = '';
+ $pass = '';
+ } elseif ( isset($smtp_sitewide_user) && isset($smtp_sitewide_pass) ) {
+ $user = $smtp_sitewide_user;
+ $pass = $smtp_sitewide_pass;
+ } else {
+ global $key, $onetimepad;
+ $user = $username;
+ $pass = OneTimePadDecrypt($key, $onetimepad);
+ }
+}
+
+?>
\ No newline at end of file
projects / squirrelmail.git / blobdiff