--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/yubikey/usercp.php	Fri Jun 30 17:49:12 2017 -0400
@@ -0,0 +1,385 @@
+<?php
+
+if ( getConfig('yubikey_enable', '1') != '1' )
+	return true;
+
+$plugins->attachHook("userprefs_jbox", "yubikey_ucp_setup();");
+$plugins->attachHook("userprefs_body", "return yubikey_user_cp(\$section);");
+$plugins->attachHook("login_form_html", "yubikey_inject_html_login();");
+$plugins->attachHook("ucp_register_form", "yubikey_inject_registration_form();");
+$plugins->attachHook("ucp_register_validate", "yubikey_register_validate(\$error);");
+$plugins->attachHook("user_registered", "yubikey_register_insert_key(\$user_id);");
+
+function yubikey_ucp_setup()
+{
+	userprefs_menu_add('usercp_sec_profile', 'yubiucp_panel_title', makeUrlNS('Special', 'Preferences/Yubikey') . '" onclick="ajaxLoginNavTo(\'Special\', \'Preferences/Yubikey\', '.USER_LEVEL_CHPREF.'); return false;');
+}
+
+function yubikey_user_cp($section)
+{
+	global $db, $session, $paths, $template, $plugins; // Common objects
+	global $lang;
+	
+	if ( $section !== 'Yubikey' )
+		return false;
+	
+	if ( $session->auth_level < USER_LEVEL_CHPREF )
+	{
+		redirect(makeUrlNS('Special', 'Login/' . $paths->fullpage, 'level=' . USER_LEVEL_CHPREF, true), 'Authentication required', 'You need to re-authenticate to access this page.', 0);
+	}
+	
+	$count_enabled = intval(getConfig('yubikey_enroll_limit', '3'));
+	
+	if ( isset($_POST['submit']) )
+	{
+		csrf_request_confirm();
+		
+		$keys = array();
+		if ( isset($_POST['yubikey_enable']) )
+		{
+			for ( $i = 0; $i < $count_enabled; $i++ )
+			{
+				if ( !empty($_POST["yubikey_otp_$i"]) )
+				{
+					$ckey =& $_POST["yubikey_otp_$i"];
+					if ( preg_match('/^[cbdefghijklnrtuv]{12,44}$/', $ckey) )
+					{
+						$ckey = substr($ckey, 0, 12);
+						$keys[] = $ckey;
+					}
+					unset($ckey);
+				}
+			}
+		}
+		// Check for double enrollment
+		$keys_check = "yubi_uid = '" . implode("' OR yubi_uid = '", $keys) . "'";
+		$q = $db->sql_query('SELECT yubi_uid FROM ' . table_prefix . "yubikey WHERE ( $keys_check ) AND user_id != {$session->user_id};");
+		if ( !$q )
+			$db->_die();
+		
+		if ( $db->numrows() > 0 )
+		{
+			echo '<div class="error-box" style="margin: 0 0 10px 0;">' . $lang->get('yubiucp_err_double_enrollment') . '</div>';
+			while ( $row = $db->fetchrow() )
+			{
+				foreach ( $keys as $i => $key )
+				{
+					if ( $key == $row['yubi_uid'] )
+					{
+						unset($keys[$i]);
+					}
+				}
+			}
+			$keys = array_values($keys);
+		}
+		$db->free_result();
+		
+		// Remove all currently registered keys
+		$q = $db->sql_query('DELETE FROM ' . table_prefix . "yubikey WHERE user_id = {$session->user_id};");
+		if ( !$q )
+			$db->_die();
+		
+		// Enroll any new keys
+		if ( !empty($keys) )
+		{
+			$query = 'INSERT INTO ' . table_prefix . "yubikey(user_id, yubi_uid) VALUES\n  " .
+ 								"( $session->user_id, '" . implode("' ),\n  ( $session->user_id, '", $keys) . "' );";
+			if ( !$db->sql_query($query) )
+				$db->_die();
+		}
+		
+		// Calculate flags
+		$yubi_flags = 0;
+		$yubi_flags |= intval($_POST['login_normal_flags']);
+		$yubi_flags |= intval($_POST['login_elev_flags']);
+		$yubi_flags |= ( isset($_POST['allow_no_yubikey']) ) ? YK_SEC_ALLOW_NO_OTP : 0;
+		
+		// update flags
+		$q = $db->sql_query('UPDATE ' . table_prefix . "users SET user_yubikey_flags = $yubi_flags WHERE user_id = {$session->user_id};");
+		if ( !$q )
+			$db->_die();
+		
+		// regenerate session
+		$q = $db->sql_query('SELECT password FROM ' . table_prefix . "users WHERE user_id = {$session->user_id};");
+		if ( !$q )
+			$db->_die();
+		list($password_hmac) = $db->fetchrow_num();
+		
+		@$session->register_session($session->user_id, $session->username, $password_hmac, USER_LEVEL_MEMBER, false);
+		$session->logout(USER_LEVEL_CHPREF);
+		
+		// redirect back to normal CP
+		// if OB-ing isn't enabled, require a JS redirect (hey, not many other options...)
+		if ( @ob_get_contents() )
+		{
+			@ob_end_clean();
+			redirect(makeUrlNS('Special', 'Preferences'), $lang->get('yubiucp_msg_save_title'), $lang->get('yubiucp_msg_save_body'), 3);
+		}
+		else
+		{
+			echo '<h3>' . $lang->get('yubiucp_msg_save_title') . '</h3>';
+			echo '<p>' . $lang->get('yubiucp_msg_save_body') . '</p>';
+			// not much choice here, i'm resorting to javascript because the user CP always
+			// sends headers :-/
+			echo '<script type="text/javascript">
+				addOnloadHook(function()
+				{' .
+				// note: $_COOKIE['sid'] has just been assigned by $session->register_session() - so it's safe to use here.
+				'
+					createCookie(\'sid\', \'' . $_COOKIE['sid'] . '\');
+					window.location = makeUrlNS(\'Special\', \'Preferences\');
+				});
+			</script>';
+			return true;
+		}
+	}
+	else
+	{
+		// Fetch flags
+		$q = $db->sql_query('SELECT user_yubikey_flags FROM ' . table_prefix . "users WHERE user_id = {$session->user_id};");
+		if ( !$q )
+			$db->_die();
+		
+		list($yubi_flags) = $db->fetchrow_num();
+		$yubi_flags = intval($yubi_flags);
+		// Fetch user's authorized keys from the DB
+		$q = $db->sql_query('SELECT yubi_uid FROM ' . table_prefix . "yubikey WHERE user_id = {$session->user_id};");
+		if ( !$q )
+			$db->_die();
+		
+		$keys = array();
+		while ( $row = $db->fetchrow() )
+		{
+			$keys[] = $row['yubi_uid'];
+		}
+		$db->free_result();
+	}
+	
+	while ( count($keys) < $count_enabled )
+	{
+		$keys[] = false;
+	}
+	
+	$enable_checked = ( $keys[0] === false && !isset($_POST['yubikey_enable']) ) ? '' : 'checked="checked"';
+	$displaytable = ( $keys[0] === false && !isset($_POST['yubikey_enable']) ) ? 'none' : 'block';
+	
+	$check_normal_keyonly = ( !($yubi_flags & YK_SEC_NORMAL_USERNAME) && !($yubi_flags & YK_SEC_NORMAL_PASSWORD) ) ? 'checked="checked" ' : '';
+	$check_normal_username = ( ($yubi_flags & YK_SEC_NORMAL_USERNAME) && !($yubi_flags & YK_SEC_NORMAL_PASSWORD) ) ? 'checked="checked" ' : '';
+	$check_normal_userandpw = ( ($yubi_flags & YK_SEC_NORMAL_USERNAME) && ($yubi_flags & YK_SEC_NORMAL_PASSWORD) ) ? 'checked="checked" ' : '';
+
+	$check_elev_keyonly = ( !($yubi_flags & YK_SEC_ELEV_USERNAME) && !($yubi_flags & YK_SEC_ELEV_PASSWORD) ) ? 'checked="checked" ' : '';
+	$check_elev_username = ( ($yubi_flags & YK_SEC_ELEV_USERNAME) && !($yubi_flags & YK_SEC_ELEV_PASSWORD) ) ? 'checked="checked" ' : '';
+	$check_elev_userandpw = ( ($yubi_flags & YK_SEC_ELEV_USERNAME) && ($yubi_flags & YK_SEC_ELEV_PASSWORD) ) ? 'checked="checked" ' : '';  
+	
+	?>
+	<h3 style="margin-top: 0;"><?php echo $lang->get('yubiucp_panel_title'); ?></h3>
+	
+	<form action="<?php echo makeUrlNS('Special', 'Preferences/Yubikey'); ?>" method="post">
+	
+	<div>
+		<table border="0" cellpadding="4" width="100%">
+			<tr>
+				<td style="width: 50%; text-align: right;">
+					<?php echo $lang->get('yubiucp_field_enable_title'); ?><br />
+					<small><?php echo $lang->get('yubiucp_field_enable_hint'); ?></small>
+				</td>
+				<td style="width: 50%;">
+					<label>
+						<input type="checkbox" name="yubikey_enable" onclick="if ( $(this).attr('checked') ) $('#yk_useroptions').show('blind'); else $('#yk_useroptions').hide('blind');" <?php echo $enable_checked; ?> />
+						<?php echo $lang->get('yubiucp_field_enable'); ?>
+					</label>
+				</td>
+			</tr>
+		</table>
+		<table border="0" cellpadding="4" width="100%" id="yk_useroptions" style="display: <?php echo $displaytable ?>;">
+			<tr class="yk_alt1">
+			<td style="width: 50%; text-align: right;">
+					<?php echo $lang->get('yubiucp_field_keys_title'); ?><br />
+					<small><?php
+					echo $lang->get('yubiucp_field_keys_hint');
+					if ( $count_enabled > 1 )
+					{
+						echo ' ';
+						echo $lang->get('yubiucp_field_keys_maximum', array('max' => $count_enabled));
+					}
+					?></small>
+				</td>
+				<td style="width: 50%;">
+					<?php
+					for ( $i = 0; $i < $count_enabled; $i++ )
+					{
+						echo '<p>' . generate_yubikey_field('yubikey_otp_' . $i, $keys[$i]) . '</p>';
+					}
+					?>
+				</td>
+			</tr>
+			<tr>
+				<td style="width: 50%; text-align: right;">
+					<?php echo $lang->get('yubiucp_field_normal_flags'); ?>
+				</td>
+				<td>
+					<label>
+						<input type="radio" name="login_normal_flags" value="0" <?php echo $check_normal_keyonly; ?>/>
+						<?php echo $lang->get('yubiucp_field_flags_keyonly'); ?>
+					</label>
+					
+					<br />
+					
+					<label>
+						<input type="radio" name="login_normal_flags" value="<?php echo strval(YK_SEC_NORMAL_USERNAME); ?>" <?php echo $check_normal_username; ?>/>
+						<?php echo $lang->get('yubiucp_field_flags_username'); ?>
+					</label>
+					
+					<br />
+					
+					<label>
+						<input type="radio" name="login_normal_flags" value="<?php echo strval(YK_SEC_NORMAL_USERNAME | YK_SEC_NORMAL_PASSWORD); ?>" <?php echo $check_normal_userandpw; ?>/>
+						<?php echo $lang->get('yubiucp_field_flags_userandpw'); ?>
+					</label>
+				</td>
+			</tr>
+			<tr class="yk_alt1">
+				<td style="width: 50%; text-align: right;">
+					<?php echo $lang->get('yubiucp_field_elev_flags'); ?>
+				</td>
+				<td>
+					<label>
+						<input type="radio" name="login_elev_flags" value="0" <?php echo $check_elev_keyonly; ?>/>
+						<?php echo $lang->get('yubiucp_field_flags_keyonly'); ?>
+					</label>
+					
+					<br />
+					
+					<label>
+						<input type="radio" name="login_elev_flags" value="<?php echo strval(YK_SEC_ELEV_USERNAME); ?>" <?php echo $check_elev_username; ?>/>
+						<?php echo $lang->get('yubiucp_field_flags_username'); ?>
+					</label>
+					
+					<br />
+					
+					<label>
+						<input type="radio" name="login_elev_flags" value="<?php echo strval(YK_SEC_ELEV_USERNAME | YK_SEC_ELEV_PASSWORD); ?>" <?php echo $check_elev_userandpw; ?>/>
+						<?php echo $lang->get('yubiucp_field_flags_userandpw'); ?>
+					</label>
+				</td>
+			</tr>
+			<tr>
+				<td>
+				</td>
+				<td>
+					<label>
+						<input type="checkbox" name="allow_no_yubikey" <?php if ( $yubi_flags & YK_SEC_ALLOW_NO_OTP ) echo 'checked="checked" '; ?>/>
+						<?php echo $lang->get('yubiucp_field_allow_plain_login'); ?>
+					</label>
+					<br />
+					<small>
+						<?php echo $lang->get('yubiucp_field_allow_plain_login_hint'); ?>
+					</small>
+				</td>
+			</tr>
+		</table>
+		<table border="0" cellpadding="4" width="100%">
+			<tr class="yk_alt1">
+				<td colspan="2" style="text-align: center;">
+					<input type="submit" name="submit" value="<?php echo $lang->get('etc_save_changes'); ?>" />
+				</td>
+			</tr>
+		</table>
+	</div>
+	
+	<input type="hidden" name="cstok" value="<?php echo $session->csrf_token; ?>" />
+	
+	</form>
+	<?php
+	
+	return true;
+}
+
+function yubikey_inject_html_login()
+{
+	global $lang;
+	?>
+	<tr>
+		<td class="row2">
+			<?php echo $lang->get('yubiauth_lbl_otp_field'); ?>
+		</td>
+		<td class="row1" colspan="2">
+			<input type="text" size="40" class="yubikey_noscript" name="yubikey_otp" />
+		</td>
+	</tr>
+	<?php
+}
+
+function yubikey_inject_registration_form()
+{
+	global $lang;
+	
+	$preset_otp = isset($_POST['yubikey_otp']) ? $_POST['yubikey_otp'] : false;
+	?>
+	<tr>
+		<td class="row1">
+			<?php echo $lang->get('yubiucp_reg_field_otp'); ?><br />
+			<small><?php
+				if ( getConfig('yubikey_reg_require_otp', '0') == '1' )
+					echo $lang->get('yubiucp_reg_field_otp_hint_required');
+				else
+					echo $lang->get('yubiucp_reg_field_otp_hint_optional');
+			?></small>
+		</td>
+		<td class="row1">
+			<?php
+			echo generate_yubikey_field('yubikey_otp', $preset_otp);
+			?>
+		</td>
+		<td class="row1">
+		</td>
+	</tr>
+	<?php
+}
+
+function yubikey_register_validate(&$error)
+{
+	global $db, $session, $paths, $template, $plugins; // Common objects
+	global $lang;
+	
+	$otp_required = getConfig('yubikey_reg_require_otp', '0') == '1';
+	$have_otp = !empty($_POST['yubikey_otp']);
+	if ( $otp_required && !$have_otp )
+	{
+		$error = $lang->get('yubiucp_reg_err_otp_required');
+		return false;
+	}
+	if ( $have_otp )
+	{
+		$result = yubikey_validate_otp($_POST['yubikey_otp']);
+		if ( !$result['success'] )
+		{
+			$error = '<b>' . $lang->get('yubiucp_reg_err_otp_invalid') . '</b><br />' . $lang->get("yubiauth_err_{$result['error']}");
+			return false;
+		}
+		// check for double enrollment
+		$yubi_uid = substr($_POST['yubikey_otp'], 0, 12);
+		// Note on SQL injection: yubikey_validate_otp() has already ensured that this is safe
+		$q = $db->sql_query('SELECT 1 FROM ' . table_prefix . "yubikey WHERE yubi_uid = '$yubi_uid';");
+		if ( !$q )
+			$db->_die();
+		if ( $db->numrows() > 0 )
+		{
+			$error = '<b>' . $lang->get('yubiucp_reg_err_otp_invalid') . '</b><br />' . $lang->get('yubiucp_err_double_enrollment_single');
+			return false;
+		}
+		$db->free_result();
+	}
+}
+
+function yubikey_register_insert_key($user_id)
+{
+	global $db, $session, $paths, $template, $plugins; // Common objects
+	if ( !empty($_POST['yubikey_otp']) )
+	{
+		$yubi_uid = $db->escape(substr($_POST['yubikey_otp'], 0, 12));
+		$q = $db->sql_query('INSERT INTO ' . table_prefix . "yubikey ( user_id, yubi_uid ) VALUES ( $user_id, '$yubi_uid' );");
+		if ( !$q )
+			$db->_die();
+	}
+}