author Nicolas Silva <>
Tue, 28 Mar 2017 16:35:55 +0200
changeset 350130 60cb618034c4a249f9a1a37b3dee8281b851d597
parent 348942 6e45140618b1f3c5d1d98b2f7c351e81a09f2584
child 362006 027f5f5b7221b39f5dbca2c2ca43c9e58587d301
permissions -rw-r--r--
Bug 1309200 - Expose the software backend in gfxVars. r=dvander

/* -*- 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 */

/* Defines the abstract interface for a principal. */

#include "nsISerializable.idl"

struct JSPrincipals;
#include "nsCOMPtr.h"
#include "nsTArray.h"
#include "mozilla/DebugOnly.h"
namespace mozilla {
class OriginAttributes;

 * Some methods have a fast path for the case when we're comparing a principal
 * to itself. The situation may happen for example with about:blank documents.

#define DECL_FAST_INLINE_HELPER(method_)                       \
  inline bool method_(nsIPrincipal* aOther)                    \
  {                                                            \
    mozilla::DebugOnly<bool> val = false;                      \
    MOZ_ASSERT_IF(this == aOther,                              \
                  NS_SUCCEEDED(method_(aOther, &val)) && val); \
    bool retVal = false;                                       \
    return                                                     \
      this == aOther ||                                        \
      (NS_SUCCEEDED(method_(aOther, &retVal)) && retVal);      \


interface nsIURI;
interface nsIContentSecurityPolicy;
interface nsIDOMDocument;

[ptr] native JSContext(JSContext);
[ptr] native JSPrincipals(JSPrincipals);
[ptr] native PrincipalArray(nsTArray<nsCOMPtr<nsIPrincipal> >);
[ref] native const_OriginAttributes(const mozilla::OriginAttributes);

[scriptable, builtinclass, uuid(f75f502d-79fd-48be-a079-e5a7b8f80c8b)]
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 takes document.domain changes into account.
    boolean equalsConsideringDomain(in nsIPrincipal other);


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

     * 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 null unless script successfully sets document.domain to our URI
     * or a superdomain of our URI.
     * Setting this has no effect on the URI.
     * See
    [noscript] attribute nsIURI domain;

     * 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 takes document.domain into
     * account.
    boolean subsumesConsideringDomain(in nsIPrincipal other);

     * Same as the subsumesConsideringDomain(), but ignores the first party
     * domain in its originAttributes.
    boolean subsumesConsideringDomainIgnoringFPD(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 can only load URIs where they are the principal. This is
     * changed by the optional flag allowIfInheritsPrincipal (which defaults to
     * false) which allows URIs that inherit their loader's 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.
     * Use this function to query the associated CSP with this principal.
     * Please *only* use this function to *set* a CSP when you know exactly what you are doing.
     * Most likely you want to call ensureCSP instead of setCSP.
    [noscript] attribute nsIContentSecurityPolicy csp;

     * Use this function to query a CSP associated with this principal.
     * If no CSP is associated with this principal then one is created
     * internally and setRequestContext is called on the CSP using aDocument.
     * Please note if aDocument is null, then setRequestContext on the
     * CSP object is called using the current principal.
    [noscript] nsIContentSecurityPolicy ensureCSP(in nsIDOMDocument aDocument);

     * A speculative Content Security Policy associated with this
     * principal. Set during speculative loading (preloading) and
     * used *only* for preloads.
     * If you want to query the CSP associated with that principal,
     * then this is *not* what you want. Instead query 'csp'.
    [noscript] readonly attribute nsIContentSecurityPolicy preloadCsp;

     * Use this function to query a speculative CSP associated with this
     * principal. If no speculative CSP is associated with this principal
     * then one is created internally and setRequestContext is called on
     * the CSP using aDocument.
     * Please note if aDocument is null, then setRequestContext on the
     * speculative CSP object is called using the current principal.
    [noscript] nsIContentSecurityPolicy ensurePreloadCSP(in nsIDOMDocument aDocument);

     * The CSP of the principal in JSON notation.
     * Note, that the CSP itself is not exposed to JS, but script
     * should be able to obtain a JSON representation of the CSP.
    readonly attribute AString cspJSON;

     * A dictionary of the non-default origin attributes associated with this
     * nsIPrincipal.
     * Attributes are tokens that are taken into account when determining whether
     * two principals are same-origin - if any attributes differ, the principals
     * are cross-origin, even if the scheme, host, and port are the same.
     * Attributes should also be considered for all security and bucketing decisions,
     * even those which make non-standard comparisons (like cookies, which ignore
     * scheme, or quotas, which ignore subdomains).
     * If you're looking for an easy-to-use canonical stringification of the origin
     * attributes, see |originSuffix| below.
    readonly attribute jsval originAttributes;

    [noscript, notxpcom, nostdcall, binaryname(OriginAttributesRef)]
    const_OriginAttributes OriginAttributesRef();

     * A canonical representation of the origin for this principal. This
     * consists of a base string (which, for codebase principals, is of the
     * format scheme://host:port), concatenated with |originAttributes| (see
     * below).
     * We maintain the invariant that principalA.equals(principalB) if and only
     * if principalA.origin == principalB.origin.
    readonly attribute ACString origin;

     * The base part of |origin| without the concatenation with |originSuffix|.
     * This doesn't have the important invariants described above with |origin|,
     * and as such should only be used for legacy situations.
    readonly attribute ACString originNoSuffix;

     * A string of the form !key1=value1&key2=value2, where each pair represents
     * an attribute with a non-default value. If all attributes have default
     * values, this is the empty string.
     * The value of .originSuffix is automatically serialized into .origin, so any
     * consumers using that are automatically origin-attribute-aware. Consumers with
     * special requirements must inspect and compare .originSuffix manually.
    readonly attribute AUTF8String originSuffix;

     * The base domain of the codebase URI to which this principal pertains
     * (generally the document URI), handling null principals and
     * non-hierarchical schemes correctly.
    readonly attribute ACString baseDomain;

    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;

     * Gets the principal's app status, which indicates whether the principal
     * corresponds to "app code", and if it does, how privileged that code is.
     * This method returns one of the APP_STATUS constants above.
     * Note that a principal may have
     *   appId != nsIScriptSecurityManager::NO_APP_ID &&
     *   appId != nsIScriptSecurityManager::UNKNOWN_APP_ID
     * and still have appStatus == APP_STATUS_NOT_INSTALLED.  That's because
     * appId identifies the app that contains this principal, but a window
     * might be contained in an app and not be running code that the app has
     * vouched for.  For example, the window might be inside an <iframe
     * mozbrowser>, or the window's origin might not match the app's origin.
     * If you're doing a check to determine "does this principal correspond to
     * app code?", you must check appStatus; checking appId != NO_APP_ID is not
     * sufficient.
    [infallible] readonly attribute unsigned short appStatus;

     * Gets the id of the app this principal is inside.  If this principal is
     * not inside an app, returns nsIScriptSecurityManager::NO_APP_ID.
     * Note that this principal does not necessarily have the permissions of
     * the app identified by appId.  For example, this principal might
     * correspond to an iframe whose origin differs from that of the app frame
     * containing it.  In this case, the iframe will have the appId of its
     * containing app frame, but the iframe must not run with the app's
     * permissions.
     * Similarly, this principal might correspond to an <iframe mozbrowser>
     * inside an app frame; in this case, the content inside the iframe should
     * not have any of the app's permissions, even if the iframe is at the same
     * origin as the app.
     * If you're doing a security check based on appId, you must check
     * appStatus as well.
    [infallible] readonly attribute unsigned long appId;

     * Gets the ID of the add-on this principal belongs to.
    readonly attribute AString addonId;

     * Gets the id of the user context this principal is inside.  If this
     * principal is inside the default userContext, this returns
     * nsIScriptSecurityManager::DEFAULT_USER_CONTEXT_ID.
    [infallible] readonly attribute unsigned long userContextId;

     * Gets the id of the private browsing state of the context containing
     * this principal. If the principal has a private browsing value of 0, it
     * is not in private browsing.
    [infallible] readonly attribute unsigned long privateBrowsingId;

     * Returns true iff the principal is inside an isolated mozbrowser element.
     * <xul:browser> is not considered to be a mozbrowser element.
     * <iframe mozbrowser noisolation> does not count as isolated since
     * isolation is disabled.  Isolation can only be disabled if the
     * containing document is chrome.
    [infallible] readonly attribute boolean isInIsolatedMozBrowserElement;

     * 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.
    [infallible] readonly attribute boolean unknownAppId;

     * Returns true iff this is a null principal (corresponding to an
     * unknown, hence assumed minimally privileged, security context).
    [infallible] readonly attribute boolean isNullPrincipal;

     * Returns true iff this principal corresponds to a codebase origin.
    [infallible] readonly attribute boolean isCodebasePrincipal;

     * Returns true iff this is an expanded principal.
    [infallible] readonly attribute boolean isExpandedPrincipal;

     * Returns true iff this is the system principal.
    [infallible] readonly attribute boolean isSystemPrincipal;

 * If SystemPrincipal is too risky to use, but we want a principal to access
 * more than one origin, ExpandedPrincipals letting us define an array of
 * principals it subsumes. So script with an ExpandedPrincipals will gain
 * same origin access when at least one of its principals it contains gained
 * sameorigin acccess. An ExpandedPrincipal will be subsumed by the system
 * principal, and by another ExpandedPrincipal 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
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;