/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Strict-Transport-Security.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *  Sid Stamm <sid@mozilla.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsISupports.idl"

interface nsIURI;
interface nsIObserver;
interface nsIHttpChannel;

[scriptable, uuid(16955eee-6c48-4152-9309-c42a465138a1)]
interface nsIStrictTransportSecurityService : nsISupports
{
    /**
     * Parses a given HTTP header and records the results internally.
     * The format of the STS header is defined by the STS specification:
     * http://tools.ietf.org/html/draft-hodges-strict-transport-sec
     * and allows a host to specify that future requests on port 80 should be
     * upgraded to HTTPS.
     *
     * @param aSourceURI the URI of the resource with the HTTP header.
     * @param aHeader the HTTP response header specifying STS data.
     * @return NS_OK            if it succeeds
     *         NS_ERROR_FAILURE if it can't be parsed
     *         NS_SUCCESS_LOSS_OF_INSIGNIFICANT_DATA
     *                          if there are unrecognized tokens in the header.
     */
    void processStsHeader(in nsIURI aSourceURI,
                          in string aHeader);

    /**
     * Removes the STS state of a host, including the includeSubdomains state
     * that would affect subdomains.  This essentially removes STS state for
     * the domain tree rooted at this host.
     */
    void removeStsState(in nsIURI aURI);

    /**
     * Checks if the given security info is for an STS host with a broken
     * transport layer (certificate errors like invalid CN).
     */
    PRBool shouldIgnoreStsHeader(in nsISupports aSecurityInfo);

    /**
     * Checks whether or not the given hostname has STS state set.
     * The host is an STS host if either it has the STS permission, or one of
     * its super-domains has an STS "includeSubdomains" permission set.
     *
     * @param aHost the hostname (punycode) to query for STS state.
     */
    PRBool isStsHost(in string aHost);

    /**
     * Checks whether or not the URI's hostname has STS state set.
     * The URI is an STS URI if either the host has the STS permission, or one
     * of its super-domains has an STS "includeSubdomains" permission set.
     * NOTE: this function makes decisions based only on the scheme and
     * host contained in the URI, and disregards other portions of the URI
     * such as path and port.
     *
     * @param aURI the URI to query for STS state.
     */
    PRBool isStsURI(in nsIURI aURI);

};

%{C++
#define NS_STSSERVICE_CONTRACTID "@mozilla.org/stsservice;1"
#define NS_STSSERVICE_CLASSNAME "stsservice"

#define STS_PERMISSION "sts/use"
#define STS_SUBDOMAIN_PERMISSION "sts/subd"
%}
