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Last change
on this file since 3019 was
2989,
checked in by broder, 15 years ago
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Select an authz module using setuptools' entry points mechainsm.
Instead of having each authz package install an invirt.authz module,
have them install modules under their own namespace.
In their setup.py, they should indicate that their authz module
provides a unique name within the invirt.authz entry point group.
The new invirt.authz module (part of invirt-base) then gets a name
from the configuration and uses that to find the module.
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File size:
891 bytes
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| 1 | """Invirt authorization. |
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| 2 | |
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| 3 | This module acts as a loader for the pluggable authorization system. |
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| 4 | |
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| 5 | Any Python module which wishes to provide an authorization scheme for |
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| 6 | Invirt should advertise an entry point in the invirt.authz group with |
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| 7 | a unique name. That name can then be configured in |
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| 8 | /etc/invirt/master.yaml as the authz mechanism. |
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| 9 | """ |
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| 10 | |
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| 11 | |
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| 12 | import pkg_resources |
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| 13 | |
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| 14 | from invirt.config import structs as cfg |
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| 15 | |
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| 16 | |
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| 17 | def expandOwner(name): |
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| 18 | """Expand an "owner" to a list of authorized users.""" |
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| 19 | for ep in pkg_resources.iter_entry_points('invirt.authz', cfg.authz.name): |
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| 20 | return ep.load().expandOwner(name) |
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| 21 | |
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| 22 | |
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| 23 | def expandAdmin(name): |
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| 24 | """Expand an "administrator" to a list of authorized users.""" |
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| 25 | for ep in pkg_resources.iter_entry_points('invirt.authz', cfg.authz.name): |
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| 26 | return ep.load().expandAdmin(name) |
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| 27 | |
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| 28 | |
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| 29 | __all__ = ['expandOwner', |
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| 30 | 'expandAdmin', |
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| 31 | ] |
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