gecko/caps/idl/nsIPrincipal.idl
2012-10-30 21:36:32 -04:00

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* Defines the abstract interface for a principal. */
#include "nsISerializable.idl"
%{C++
struct JSContext;
struct JSPrincipals;
#include "nsCOMPtr.h"
#include "nsTArray.h"
%}
interface nsIURI;
interface nsIContentSecurityPolicy;
[ptr] native JSContext(JSContext);
[ptr] native JSPrincipals(JSPrincipals);
[ptr] native PrincipalArray(nsTArray<nsCOMPtr<nsIPrincipal> >);
[scriptable, uuid(3a283dc9-f733-4618-a36f-e2b68c280ab7)]
interface nsIPrincipal : nsISerializable
{
/**
* Returns whether the other principal is equivalent to this principal.
* Principals are considered equal if they are the same principal, or
* they have the same origin.
*/
boolean equals(in nsIPrincipal other);
/**
* Like equals, but doesn't take document.domain changes into account.
*/
boolean equalsIgnoringDomain(in nsIPrincipal other);
/**
* Returns a hash value for the principal.
*/
[noscript] readonly attribute unsigned long hashValue;
/**
* 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.
[noscript] attribute voidPtr securityPolicy;
/**
* 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.
*/
[noscript] attribute nsIURI domain;
/**
* The origin of this principal's codebase URI.
* An origin is defined as: scheme + host + port.
*/
// 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;
/**
* Returns whether the other principal is equal to or weaker than this
* principal. Principals are equal if they are the same object or they
* have the same origin.
*
* Thus a principal always subsumes itself.
*
* The system principal subsumes itself and all other principals.
*
* A null principal (corresponding to an unknown, hence assumed minimally
* privileged, security context) is not equal to any other principal
* (including other null principals), and therefore does not subsume
* anything but itself.
*/
boolean subsumes(in nsIPrincipal other);
/**
* Same as the previous method, subsumes(), but for codebase principals
* ignores changes to document.domain.
*/
boolean subsumesIgnoringDomain(in nsIPrincipal other);
/**
* Checks whether this principal is allowed to load the network resource
* located at the given URI under the same-origin policy. This means that
* codebase principals are only allowed to load resources from the same
* domain, the system principal is allowed to load anything, and null
* principals are not allowed to load anything. This is changed slightly
* by the optional flag allowIfInheritsPrincipal (which defaults to false)
* which allows the load of a data: URI (which inherits the principal of
* its loader) or a URI with the same principal as its loader (eg. a
* Blob URI).
* In these cases, with allowIfInheritsPrincipal set to true, the URI can
* be loaded by a null principal.
*
* If the load is allowed this function does nothing. If the load is not
* allowed the function throws NS_ERROR_DOM_BAD_URI.
*
* NOTE: Other policies might override this, such as the Access-Control
* specification.
* NOTE: The 'domain' attribute has no effect on the behaviour of this
* function.
*
*
* @param uri The URI about to be loaded.
* @param report If true, will report a warning to the console service
* if the load is not allowed.
* @param allowIfInheritsPrincipal If true, the load is allowed if the
* loadee inherits the principal of the
* loader.
* @throws NS_ERROR_DOM_BAD_URI if the load is not allowed.
*/
void checkMayLoad(in nsIURI uri, in boolean report,
in boolean allowIfInheritsPrincipal);
/**
* A Content Security Policy associated with this principal.
*/
[noscript] attribute nsIContentSecurityPolicy csp;
/**
* Returns the extended origin of the principal.
* The extended origin is a string that has more information than the origin
* and can be used to isolate data or permissions between different
* principals while taking into account parameters like the app id or the
* fact that the principal is embedded in a mozbrowser.
* Some principals will return the origin for extendedOrigin.
* Some principals will assert if you try to access the extendedOrigin.
*
* The extendedOrigin is intended to be an opaque identifier. It is
* currently "human-readable" but no callers should assume it will stay
* as is and it might be crypto-hashed at some point.
*/
readonly attribute AUTF8String extendedOrigin;
const short APP_STATUS_NOT_INSTALLED = 0;
const short APP_STATUS_INSTALLED = 1;
const short APP_STATUS_PRIVILEGED = 2;
const short APP_STATUS_CERTIFIED = 3;
/**
* Shows the status of the app.
* Can be: APP_STATUS_NOT_INSTALLED, APP_STATUS_INSTALLED,
* APP_STATUS_PRIVILEGED or APP_STATUS_CERTIFIED.
*/
readonly attribute unsigned short appStatus;
%{C++
uint16_t GetAppStatus()
{
uint16_t appStatus;
nsresult rv = GetAppStatus(&appStatus);
if (NS_FAILED(rv)) {
return APP_STATUS_NOT_INSTALLED;
}
return appStatus;
}
%}
/**
* Returns the app id the principal is in, or returns
* nsIScriptSecurityManager::NO_APP_ID if this principal isn't part of an
* app.
*/
readonly attribute unsigned long appId;
%{C++
uint32_t GetAppId()
{
uint32_t appId;
mozilla::DebugOnly<nsresult> rv = GetAppId(&appId);
MOZ_ASSERT(NS_SUCCEEDED(rv));
return appId;
}
%}
/**
* Returns true iif the principal is inside a browser element.
*/
readonly attribute boolean isInBrowserElement;
%{C++
bool GetIsInBrowserElement()
{
bool isInBrowserElement;
mozilla::DebugOnly<nsresult> rv = GetIsInBrowserElement(&isInBrowserElement);
MOZ_ASSERT(NS_SUCCEEDED(rv));
return isInBrowserElement;
}
%}
/**
* Returns true if this principal has an unknown appId. This shouldn't
* generally be used. We only expose it due to not providing the correct
* appId everywhere where we construct principals.
*/
readonly attribute boolean unknownAppId;
%{C++
bool GetUnknownAppId()
{
bool unkwnownAppId;
mozilla::DebugOnly<nsresult> rv = GetUnknownAppId(&unkwnownAppId);
MOZ_ASSERT(NS_SUCCEEDED(rv));
return unkwnownAppId;
}
%}
/**
* Returns true iff this principal is a null principal (corresponding to an
* unknown, hence assumed minimally privileged, security context).
*/
readonly attribute boolean isNullPrincipal;
};
/**
* If nsSystemPrincipal is too risky to use, but we want a principal to access
* more than one origin, nsExpandedPrincipals letting us define an array of
* principals it subsumes. So script with an nsExpandedPrincipals will gain
* same origin access when at least one of its principals it contains gained
* sameorigin acccess. An nsExpandedPrincipal will be subsumed by the system
* principal, and by another nsExpandedPrincipal that has all its principals.
* It is added for jetpack content-scripts to let them interact with the
* content and a well defined set of other domains, without the risk of
* leaking out a system principal to the content. See: Bug 734891
*/
[uuid(f3e177Df-6a5e-489f-80a7-2dd1481471d8)]
interface nsIExpandedPrincipal : nsISupports
{
/**
* An array of principals that the expanded principal subsumes.
* Note: this list is not reference counted, it is shared, so
* should not be changed and should only be used ephemerally.
*/
[noscript] readonly attribute PrincipalArray whiteList;
};