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Re: [equinox-dev] OSGi security manager in Equinox
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I agree, this is the best place and a regular bundle after that will do. The trick is to initialize the table in the first place.
I couldn't find a documented way to do that. One pointer I think might be relevant, judging on the code, is the .permdata file that is read when a new BasePermissionStorage is created. I'm not really sure where this file should be placed, but I assume in "/configuration/org.eclipse.osgi"?
Do you know of that's the right way to initialize the conditional permission table? Also what should be the syntax of that file?
If there's another way I'm all ears :)
Also I got the impression this initialization can be achieved with the standard launcher, right?
Thanks,
Borislav
-----Original Message-----
From: equinox-dev-bounces@xxxxxxxxxxx [mailto:equinox-dev-bounces@xxxxxxxxxxx] On Behalf Of Thomas Watson
Sent: Thursday, December 08, 2011 4:26 PM
To: Equinox development mailing list
Subject: Re: [equinox-dev] OSGi security manager in Equinox
Hi Borislav,
Your intuition is correct. The best place for setting the initial
conditional permission table is in the launcher after initializing the
framework (Framework.init()) with an empty storage area. But after that I
think using a normal bundle (configurator type bundle) to do the ongoing
management of the permission table is fine.
Tom
From: Borislav Kapukaranov <b.kapukaranov@xxxxxxxxx>
To: Equinox development mailing list <equinox-dev@xxxxxxxxxxx>,
Date: 12/07/2011 09:59 PM
Subject: Re: [equinox-dev] OSGi security manager in Equinox
Thanks Tom, that was really helpful.
At this point I wonder if the only way to configure a secure framework is
to make sure you start a bundle right after the framework has booted which
will configure the (C)PA?
Any other ways to achieve that in addition to having a custom launcher? I'm
looking for a best practice here :-)
Why custom launcher - I suppose that's safer because it won't be affected
by any provisioning mechanism that can reorder your bundles' start or
rewrite your config.ini.
Thanks,
Borislav
On Dec 7, 2011 8:56 PM, "Thomas Watson" <tjwatson@xxxxxxxxxx> wrote:
The policy file (specified by java.security.policy) is only used by class
loaders that extend SecureClassloader. So things like the
URLClassLoader,
the application and extension class loader etc. A bundle's class loader
does not pay attention to the java.security.policy file.
The protection domains used by the OSGi bundle class loaders are only
configured by the ConditionalPermissionAdmin and the deprecated
PermissionAdmin services. By default if no permissions are set through
the
[Conditional]PermissionAdmin services then the bundles get AllPermission
by
default. Section 50.11 of the Core OSGi specification gives more details
on this.
Tom
From: Borislav Kapukaranov <b.kapukaranov@xxxxxxxxx>
To: Equinox development mailing list <equinox-dev@xxxxxxxxxxx>,
Date: 12/07/2011 11:18 AM
Subject: [equinox-dev] OSGi security manager in Equinox
Hi folks,
I'm playing with OSGi's security manager in Equinox and the
implementation
of the Conditional Permissions Admin called SecurityAdmin.
My setup is Equinox + some other bundles. This is launched by the
equinox.launcher and I've passed the following as system properties:
-Declipse.security=osgi
-Djava.security.policy="my.policy
The policy looks like that
keystore "myKeystore";
grant signedBy "myself" {
permission java.security.AllPermission;
};
I have signed all bundles in /plugins with that keystore and granted them
all premissions with the policy.
The first thing I noticed is that without a policy file the framework
still
starts. That is because when we are in OSGi security mode the launcher
adds
all permissions to itself and the framework.
I created a simple bundle that in its Activator creates a directory at a
location different from it's data file. It doesn't have any local
permissions.
The call went into the EquinoxSecurityManager then started checking for
implied permissions at the AccessControlContext. The important point is
checking the Protection Domains. It went through two of them:
1. The system bundle's protection domain as the system bundle triggered
the
Activator of my bundle.
2. The bundle's protection domain, probably for local permissions.
1) has all permission as it is the framework and 2) doesn't have any
local
permission therefore by specification gets AllPermission.
So far so good.
My question is how the EquinoxSecurityManager is expected to be
configured?
From what I've seen the policy file syntax doesn't support the permission
syntax defined in the OSGi specification(ALLOW, DENY).
Does that mean OSGi's security manager is configured only by a bundle
interacting with the Conditional Permission Admin service?
Also does the policy file play any role at all in such setup? I suspect
it's relevant only for pure Java security setup.
Thanks,
Borislav_______________________________________________
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