This patch has three parts to it:
1) Use NS_IsContentAccessibleAboutURI to ensure that only safe
about: documents get exempted.
With this change, we will no longer allow about:blank or
about:srcdoc to be exempted base on URI. If they are to be
exempted, it will need to be base on other information.
2) In Document::RecomputeResistFingerprinting we previously
deferred to a Parent Document if we had one, and either the
principals matched or we were a null principal.
We will do the same thing, except we will also defer to our
opener as well as the parent document. Now about:blank
documents can be exempted.
However, this deferral only works if the opener is
same-process. For cross-process openers, we make the decision
ourselves.
We can make the wrong decision though. CookieJarSettings is
inherited through iframes but it is _not_ inherited through popups.
(Yet. There's some discussion there, but it's not implemented.)
Conceptually; however, we do want CJS to inherit, and we do want
RFP to inherit as well. Because a popup can collude with its
opener to bypass RFP and Storage restrictions, we should propagate
the CJS information.
This does lead to an unusual situation: if you have exempted
b.com, and a.com (which is not exempted) creates a popup for b.com
then that popup will not be exempted. But an open tab for b.com
would be. And it might be hard to tell those two apart, or why
they behave differently.
The third part of the patch:
3) In LoadInfo we want to populate information down from the
opener to the popup. This is needed because otherwise a
cross-origin popup will not defer to its opener (because in
Fission they're in different processes) and will decide if
it should be exempted itself. It's the CookieJarSettings
object that prevents the cross-origin document from thinking
it should be exempted - CJS tells it 'No, you're a child
(either a subdocument or a popup) and if I say you don't get
an exemption, you don't.'
Finally, there is one more caveat: we can only defer to a parent
document or opener if it still exists. A popup may outlive its
opener. If that happens, and something induces a call to
RecomputeResistFingerprinting, then (e.g.) an about:blank popup
may lose an RFP exemption that it had received from its parent.
This isn't expected to happen in practice -
RecomputeResistFingerprinting is only called on document creation
and pref changes I believe.
It is not possible for a popup to _gain_ an exemption though,
because even if the parent document is gone, the CJS lives on and
restricts it.
Differential Revision: https://phabricator.services.mozilla.com/D178866
This patch has three parts to it:
1) Use NS_IsContentAccessibleAboutURI to ensure that only safe
about: documents get exempted.
With this change, we will no longer allow about:blank or
about:srcdoc to be exempted base on URI. If they are to be
exempted, it will need to be base on other information.
2) In Document::RecomputeResistFingerprinting we previously
deferred to a Parent Document if we had one, and either the
principals matched or we were a null principal.
We will do the same thing, except we will also defer to our
opener as well as the parent document. Now about:blank
documents can be exempted.
However, this deferral only works if the opener is
same-process. For cross-process openers, we make the decision
ourselves.
We can make the wrong decision though. CookieJarSettings is
inherited through iframes but it is _not_ inherited through popups.
(Yet. There's some discussion there, but it's not implemented.)
Conceptually; however, we do want CJS to inherit, and we do want
RFP to inherit as well. Because a popup can collude with its
opener to bypass RFP and Storage restrictions, we should propagate
the CJS information.
This does lead to an unusual situation: if you have exempted
b.com, and a.com (which is not exempted) creates a popup for b.com
then that popup will not be exempted. But an open tab for b.com
would be. And it might be hard to tell those two apart, or why
they behave differently.
The third part of the patch:
3) In LoadInfo we want to populate information down from the
opener to the popup. This is needed because otherwise a
cross-origin popup will not defer to its opener (because in
Fission they're in different processes) and will decide if
it should be exempted itself. It's the CookieJarSettings
object that prevents the cross-origin document from thinking
it should be exempted - CJS tells it 'No, you're a child
(either a subdocument or a popup) and if I say you don't get
an exemption, you don't.'
Finally, there is one more caveat: we can only defer to a parent
document or opener if it still exists. A popup may outlive its
opener. If that happens, and something induces a call to
RecomputeResistFingerprinting, then (e.g.) an about:blank popup
may lose an RFP exemption that it had received from its parent.
This isn't expected to happen in practice -
RecomputeResistFingerprinting is only called on document creation
and pref changes I believe.
It is not possible for a popup to _gain_ an exemption though,
because even if the parent document is gone, the CJS lives on and
restricts it.
Differential Revision: https://phabricator.services.mozilla.com/D178866
This patch has three parts to it:
1) Use NS_IsContentAccessibleAboutURI to ensure that only safe
about: documents get exempted.
With this change, we will no longer allow about:blank or
about:srcdoc to be exempted base on URI. If they are to be
exempted, it will need to be base on other information.
2) In Document::RecomputeResistFingerprinting we previously
deferred to a Parent Document if we had one, and either the
principals matched or we were a null principal.
We will do the same thing, except we will also defer to our
opener as well as the parent document. Now about:blank
documents can be exempted.
However, this deferral only works if the opener is
same-process. For cross-process openers, we make the decision
ourselves.
We can make the wrong decision though. CookieJarSettings is
inherited through iframes but it is _not_ inherited through popups.
(Yet. There's some discussion there, but it's not implemented.)
Conceptually; however, we do want CJS to inherit, and we do want
RFP to inherit as well. Because a popup can collude with its
opener to bypass RFP and Storage restrictions, we should propagate
the CJS information.
This does lead to an unusual situation: if you have exempted
b.com, and a.com (which is not exempted) creates a popup for b.com
then that popup will not be exempted. But an open tab for b.com
would be. And it might be hard to tell those two apart, or why
they behave differently.
The third part of the patch:
3) In LoadInfo we want to populate information down from the
opener to the popup. This is needed because otherwise a
cross-origin popup will not defer to its opener (because in
Fission they're in different processes) and will decide if
it should be exempted itself. It's the CookieJarSettings
object that prevents the cross-origin document from thinking
it should be exempted - CJS tells it 'No, you're a child
(either a subdocument or a popup) and if I say you don't get
an exemption, you don't.'
Finally, there is one more caveat: we can only defer to a parent
document or opener if it still exists. A popup may outlive its
opener. If that happens, and something induces a call to
RecomputeResistFingerprinting, then (e.g.) an about:blank popup
may lose an RFP exemption that it had received from its parent.
This isn't expected to happen in practice -
RecomputeResistFingerprinting is only called on document creation
and pref changes I believe.
It is not possible for a popup to _gain_ an exemption though,
because even if the parent document is gone, the CJS lives on and
restricts it.
Differential Revision: https://phabricator.services.mozilla.com/D178866
Base64 encoding is done to top-level principal and the sub-principals
of expanded principals. Getting rid of the Base64 encoding entirely
also lets us use jsoncpp consider expanded principals to be entirely
serialized as JSON.
Differential Revision: https://phabricator.services.mozilla.com/D166783
Base64 encoding is done to top-level principal and the sub-principals
of expanded principals. Getting rid of the Base64 encoding entirely
also lets us use jsoncpp consider expanded principals to be entirely
serialized as JSON.
Differential Revision: https://phabricator.services.mozilla.com/D166783
In order to handle the content script case correctly we must expose the
contentScriptAddonPolicy to JavaScript. With that we can always see what
extension is trying to perform an action and use its name rather than internal
ID in the dialog.
Differential Revision: https://phabricator.services.mozilla.com/D161282
In order to handle the content script case correctly we must expose the
contentScriptAddonPolicy to JavaScript. With that we can always see what
extension is trying to perform an action and use its name rather than internal
ID in the dialog.
Differential Revision: https://phabricator.services.mozilla.com/D161282
After the previous changes, the majority of methods on nsIPrincipal are now
threadsafe. This patch documents which methods are still bound to the main
thread, and adds thread assertions to them to avoid potential misuse.
Differential Revision: https://phabricator.services.mozilla.com/D163041
This changes out almost all places `AddonPolicy()` is used within nsIPrincipal
implementations, replacing it with the threadsafe `AddonPolicyCore()` method
and `WebExtensionPolicyCore` type.
Differential Revision: https://phabricator.services.mozilla.com/D163040
This is required for deserializing nsIPrincipal instances from PrincipalInfo to
be threadsafe, as setting domain with `SetDomain()` is only safe on the main
thread, due to it enumerating and updating JS wrappers.
Differential Revision: https://phabricator.services.mozilla.com/D163036
This patch only makes the very basics of nsIPrincipal manipulation threadsafe,
such as reference counting, and some trivial methods. The more complex methods
will be made threadsafe in following parts.
Differential Revision: https://phabricator.services.mozilla.com/D163032
In order to handle the content script case correctly we must expose the
contentScriptAddonPolicy to JavaScript. With that we can always see what
extension is trying to perform an action and use its name rather than internal
ID in the dialog.
Differential Revision: https://phabricator.services.mozilla.com/D161282
In order to handle the content script case correctly we must expose the
contentScriptAddonPolicy to JavaScript. With that we can always see what
extension is trying to perform an action and use its name rather than internal
ID in the dialog.
Differential Revision: https://phabricator.services.mozilla.com/D161282
This will be used in SitePermsAddonInstallRequestPrototype to discriminate permission
requests coming from localhost, where we want to fallback to regular permission prompt.
Depends on D151477
Differential Revision: https://phabricator.services.mozilla.com/D157658
We need a helper function for checking principal if it's in the foreign
allow list.
In this patch we will add a BasePrincipal::IsURIInList() because this is
needed for RejectForeignAllowList::Check().
Differential Revision: https://phabricator.services.mozilla.com/D123804
This provides a getter which can be used to interact with the precursor
attribute of the null principal.
Depends on D119691
Differential Revision: https://phabricator.services.mozilla.com/D119692
This is a step towards separating the mutable state on principals from const
state which can be made threadsafe. The remaining mutable fields will either
need to be moved off of nsIPrincipal or made threadsafe to destroy (e.g. using
nsMainThreadPtrHandle) and stored behind a mutex.
Serialization is handled for most types using a separate Deserializer class,
like how it was handled with `nsIURI` mutators. SystemPrincipal wasn't changed
as the `Read` method is a no-op for that class.
Differential Revision: https://phabricator.services.mozilla.com/D115092
We want to partition the CORS preflight cache by the network state
partitioning. So, we have done two things in the patch. First, we make
the CORS preflight cache to be aware of the OriginAttributes. Second, we
use the originAttributes of the network state partitioning in the CORS
preflight cache. As the result, the CORS preflight cache will be
partitioned by the originAttributes.partitionKey as well as other
originAttributes fields if present.
Differential Revision: https://phabricator.services.mozilla.com/D93683
