caps/nsIPrincipal.idl
author James Graham <james@hoppipolla.co.uk>
Thu, 05 Sep 2019 18:54:11 +0000
changeset 491901 4fe3084ae3e4ce4f20ebf6c0cf333381ac93a0c8
parent 481673 19acdaa55d35e394762897901955c92fd98fb4d8
child 494639 b99d263678a93a43d8bb2a3e4cd9904e7114fa8e
permissions -rw-r--r--
Bug 1579168 - Fix updating metadata for results that are expected but have known intermittents, r=maja_zf We were assuming that in the case that the status matched expected we'd have no expected entry in the log data. But actually it was being set to None, so handle both those cases. Differential Revision: https://phabricator.services.mozilla.com/D44874

/* -*- 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 "nsIContentSecurityPolicy.idl"
#include "nsISerializable.idl"

%{C++
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;

[ptr] native JSContext(JSContext);
[ptr] native JSPrincipals(JSPrincipals);
[ref] native PrincipalArray(const 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);

    %{C++
      DECL_FAST_INLINE_HELPER(Equals)
      DECL_FAST_INLINE_HELPER(EqualsConsideringDomain)
    %}

    /**
     * Returns a hash value for the principal.
     */
    [notxpcom, nostdcall] readonly attribute unsigned long hashValue;

    /**
     * The principal URI to which this principal pertains.  This is
     * generally the document URI.
     */
    [infallible] 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 https://developer.mozilla.org/en-US/docs/Web/Security/Same-origin_policy#Changing_origin
     */
    [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);

    %{C++
      DECL_FAST_INLINE_HELPER(Subsumes)
      DECL_FAST_INLINE_HELPER(SubsumesConsideringDomain)
      DECL_FAST_INLINE_HELPER(SubsumesConsideringDomainIgnoringFPD)
#undef DECL_FAST_INLINE_HELPER
    %}

    /**
     * Checks whether this principal is allowed to load the network resource
     * located at the given URI under the same-origin policy. This means that
     * content 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 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.
     */
    [implicit_jscontext]
    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 content 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;

    /**
     * A canonical representation of the site-origin for this principal.
     * This string has the same format as |origin| (see above). Two principals
     * with differing |siteOrigin| values will never compare equal, even when
     * considering domain mutations.
     *
     * For most principals, |siteOrigin| matches |origin| precisely. Only
     * principals which allow mutating |domain|, such as ContentPrincipal,
     * override the default implementation in BasePrincipal.
     *
     * TODO(nika): Use this in DocGroup.
     */
    readonly attribute ACString siteOrigin;

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

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

    readonly attribute nsISupports addonPolicy;

    /**
     * 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 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 principal origin.
     */
    [infallible] readonly attribute boolean isContentPrincipal;

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

    /**
     * Returns true iff this is the system principal.  C++ callers should use
     * IsSystemPrincipal() instead of this scriptable accessor.
     */
    readonly attribute boolean isSystemPrincipal;

    /**
     * Faster and nicer version callable from C++.  Callers must include
     * BasePrincipal.h, where it's implemented.
     */
    %{C++
      inline bool IsSystemPrincipal() const;
    %}

    /**
     * Returns true iff the principal is either an addon principal or
     * an expanded principal, which contains at least one addon principal.
     */
    [infallible] readonly attribute boolean isAddonOrExpandedAddonPrincipal;
};

/**
 * 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
 */
[uuid(f3e177Df-6a5e-489f-80a7-2dd1481471d8)]
interface nsIExpandedPrincipal : nsISupports
{
  /**
   * An array of principals that the expanded principal subsumes.
   *
   * When an expanded principal is used as a triggering principal for a
   * request that inherits a security context, one of its constitutent
   * principals is inherited rather than the expanded principal itself. The
   * last principal in the allowlist is the default principal to inherit.
   *
   * Note: this list is not reference counted, it is shared, so
   * should not be changed and should only be used ephemerally.
   */
  [noscript, notxpcom, nostdcall]
  PrincipalArray AllowList();


  /**
   * Bug 1548468: Move CSP off ExpandedPrincipal.
   *
   * A Content Security Policy associated with this principal. Use this function
   * to query the associated CSP with this principal.
   */
  readonly attribute nsIContentSecurityPolicy csp;

%{ C++
  inline already_AddRefed<nsIContentSecurityPolicy> GetCsp()
  {
    nsCOMPtr<nsIContentSecurityPolicy> result;
    mozilla::DebugOnly<nsresult> rv = GetCsp(getter_AddRefs(result));
    MOZ_ASSERT(NS_SUCCEEDED(rv));
    return result.forget();
  }
%}

};