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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * 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
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 * 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 mozilla.org code.
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1999-2003
 * the Initial Developer. All Rights Reserved.
 * Contributor(s):
 *   Mitchell Stoltz <mstoltz@netscape.com>
 *   Christopher A. Aillon <christopher@aillon.com>
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
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/* Defines the abstract interface for a principal. */

#include "nsISerializable.idl"

struct JSContext;
struct JSPrincipals;

interface nsIURI;

[ptr] native JSContext(JSContext);
[ptr] native JSPrincipals(JSPrincipals);

interface nsIPrincipal : nsISerializable
     * Values of capabilities for each principal. Order is
     * significant: if an operation is performed on a set
     * of capabilities, the minimum is computed.
    const short ENABLE_DENIED                = 1;
    const short ENABLE_UNKNOWN               = 2;
    const short ENABLE_WITH_USER_PERMISSION  = 3;
    const short ENABLE_GRANTED               = 4;

     * Returns the security preferences associated with this principal.
     * prefBranch will be set to the pref branch to which these preferences
     * pertain.  id is a pseudo-unique identifier, pertaining to either the
     * fingerprint or the origin.  subjectName is a name that identifies the
     * entity this principal represents (may be empty).  grantedList and
     * deniedList are space-separated lists of capabilities which were
     * explicitly granted or denied by a pref.
    void getPreferences(out string prefBranch, out string id,
                        out string subjectName,
                        out string grantedList, out string deniedList);

     * Returns whether the other principal is equivalent to this principal.
     * Principals are considered equal if they are the same principal,
     * they have the same origin, or have the same certificate fingerprint ID
    boolean equals(in nsIPrincipal other);

     * Returns a hash value for the principal.
    readonly attribute unsigned long hashValue;

     * Returns the JS equivalent of the principal.
     * @see JSPrincipals.h
    JSPrincipals getJSPrincipals(in JSContext cx);

     * The domain security policy of the principal.
    // XXXcaa should this be here?  The script security manager is the only
    // thing that should care about this.  Wouldn't storing this data in one
    // of the hashtables in nsScriptSecurityManager be better?
    // XXXbz why is this writable?  Who should have write access to this?  What
    // happens if this principal is in our hashtable and we pass it out of the
    // security manager and someone writes to this field?  Especially if they
    // write garbage?  If we need to give someone other than the security
    // manager a way to set this (which I question, since it can increase the
    // permissions of a page) it should be a |void clearSecurityPolicy()|
    // method.
    attribute voidPtr securityPolicy;

    // XXXcaa probably should be turned into {get|set}CapabilityFlags
    // XXXbz again, what if this lives in our hashtable and someone
    // messes with it?  Is that OK?
    short canEnableCapability(in string capability);
    void setCanEnableCapability(in string capability, in short canEnable);
    boolean isCapabilityEnabled(in string capability, in voidPtr annotation);
    void enableCapability(in string capability, inout voidPtr annotation);
    void revertCapability(in string capability, inout voidPtr annotation);
    void disableCapability(in string capability, inout voidPtr annotation);

     * The codebase URI to which this principal pertains.  This is
     * generally the document URI.
    readonly attribute nsIURI URI;

     * The domain URI to which this principal pertains.
     * This is congruent with HTMLDocument.domain, and may be null.
     * Setting this has no effect on the URI.
    attribute nsIURI domain;

     * The origin of this principal's codebase URI.
     * An origin is defined as: scheme + host + port.
     * (or the full URI for hostless schemes)
    // XXXcaa this should probably be turned into an nsIURI.
    // The system principal's origin should be some caps namespace
    // with a chrome URI.  All of chrome should probably be the same.
    readonly attribute string origin;

     * Whether this principal is associated with a certificate.
    readonly attribute boolean hasCertificate;

     * The fingerprint ID of this principal's certificate.
     * Throws if there is no certificate associated with this principal.
    // XXXcaa kaie says this may not be unique.  We should probably
    // consider using something else for this....
    readonly attribute AUTF8String fingerprint;

     * The pretty name for the certificate.  This sort of (but not really)
     * identifies the subject of the certificate (the entity that stands behind
     * the certificate).  Note that this may be empty; prefer to get the
     * certificate itself and get this information from it, since that may
     * provide more information.
     * Throws if there is no certificate associated with this principal.
    readonly attribute AUTF8String prettyName;

     * Returns whether the other principal is equal to or weaker than this
     * principal.  Principals are equal if they are the same object, they
     * have the same origin, or they have the same certificate ID.
     * Thus a principal subsumes itself if it is equal to itself.
     * The system principal subsumes itself and all other principals except
     * the non-principal.
     * The non-principal is not equal to itself or any other principal, and
     * therefore does not subsume itself.
     * Both codebase and certificate principals are subsumed by the system
     * principal, but no codebase or certificate principal yet subsumes any
     * other codebase or certificate principal.  This may change in a future
     * release; note that nsIPrincipal is unfrozen, not slated to be frozen.
    boolean subsumes(in nsIPrincipal other);

     * The subject name for the certificate.  This actually identifies the
     * subject of the certificate.  This may well not be a string that would
     * mean much to a typical user on its own (e.g. it may have a number of
     * different names all concatenated together with some information on what
     * they mean in between).
     * Throws if there is no certificate associated with this principal.
    readonly attribute AUTF8String subjectName;

     * The certificate associated with this principal, if any.  If there isn't
     * one, this will return null.  Getting this attribute never throws.
    readonly attribute nsISupports certificate;

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