| a72211e92bab814bfa28ee086ca9b2a1a6095c92 644525 |
|
03-Apr-2008 |
chrisd |
Avoid calling access control hooks for internal requests with
configurations which match those of the initial request. Revert to
the original behaviour (call access control hooks for internal requests
with URIs different from the initial request) if any access control hooks
or providers are not registered as permitting this optimization.
Introduce wrappers for access control hook and provider registration
which can accept additional mode and flag data.
The configuration walk optimizations were originally proposed a while
ago (see http://marc.info/?l=apache-httpd-dev&m=116536713506234&w=2);
they have been used since then in production systems and appear to be
stable and effective. They permit certain combinations of modules
and clients to function efficiently, especially when a deeply recursive
series of internal requests, such as those generated by certain WebDAV
requests, are all subject to the identical authentication and authorization
directives.
The major change from the original proposal is a cleaner mechanism for
detecting modules which may expect the old behaviour. This has been
tested successfully with Subversion's mod_authz_svn, which specifically
requires the old behaviour when performing path-based authorization based
against its own private access control configuration files. |
| 367d146f245f3b1c9f77c18e6ec591b52e0b344c 368027 |
|
11-Jan-2006 |
bnicholes |
Authz refactoring
Merge from branches/authz-dev
Basically here is a list of what has been done:
- Convert all of the authz modules from hook based to provider based
- Remove the ap_requires field from the core_dir_config structure
- Remove the function ap_requires() since its functionality is no
longer supported or necessary in the refactoring
- Remove the calls to ap_some_auth_required() in the core request
handling to allow the hooks to be called in all cases.
- Add the new module mod_authz_core which will act as the authorization
provider vector and contain common authz directives such as 'Require',
'Reject' and '<RequireAlias>'
- Add the new module mod_authn_core which will contain common
authentication directives such as 'AuthType', 'AuthName' and
'<AuthnProviderAlias>'
- Move the check for METHOD_MASK out of the authz providers and into
the authz_core provider vector
- Define the status codes that can be returned by the authz providers
as AUTHZ_DENIED, AUTHZ_GRANTED and AUTHZ_GENERAL_ERROR
- Remove the 'Satisfy' directive
- Implement the '<RequireAll>', '<RequireOne>' block directives to
handle the 'and' and 'or' logic for authorization.
- Remove the 'AuthzXXXAuthoritative' directives from all of the authz
providers
- Implement the 'Reject' directive that will deny authorization if the
argument is true
- Fold the 'Reject' directive into the '<RequireAll>', '<RequireOne>'
logic
- Reimplement the host based authorization functionality provided by
'allow', 'deny' and 'order' as authz providers
- Remove the 'allow', 'deny' and 'order' directives
- Merge mod_authn_alias into mod_authn_core
- Add '<RequireAlias>' functionality which is similar to
'<AuthnProviderAlias>' but specific to authorization aliasing
- Remove all of the references to the 'authzxxxAuthoritative'
directives from the documentation
- Remove the 'Satisfy' directive from the documentation
- Remove 'Allow', 'Deny', 'Order' directives from the documentation
- Document '<RequireAll>', '<RequireOne>', 'Reject' directives
- Reimplement the APIs ap_auth_type(), ap_auth_name() as optional
functions and move the actual implementation into mod_authn_core
- Reimplement the API ap_some_auth_required() as an optional function
and move the actual implementation into mod_authz_core
Major Changes:
- Added the directives <RequireAll>, <RequireOne>, <RequireAlias>,
Reject
- Expanded the functionality of the directive 'Require' to handle all
authorization and access control
- Added the new authz providers 'env', 'ip', 'host', 'all' to handle
host-based access control
- Removed the directives 'Allow', 'Deny', 'Order', 'Satisfy',
'AuthzXXXAuthoritative'
- Removed the ap_require() API
- Moved the directives 'AuthType', 'AuthName' out of mod_core and into
mod_authn_core
- Moved the directive 'Require' out of mod_core and into
mod_authz_core
- Merged mod_authn_alias into mod_authn_core
- Renamed mod_authz_dbm authz providers from 'group' and 'file-group'
to 'dbm-group' and 'dbm-file-group'
Benefits:
- All authorization and access control is now handle through two
directives, 'Require' and 'Reject'
- Authorization has been expanded to allow for complex 'AND/OR' control
logic through the directives '<RequireAll>' and '<RequireOne>'
- Configuration is now much simpler and consistent across the board
- Other modules like mod_ssl and mod_proxy should be able to plug into
and take advantage of the same provider based authorization mechanism
by implementing their own providers
Issues:
- Backwards compatibility between 2.2 and 2.3 configurations will be
broken in the area of authorization and access control due to the fact
that the directives 'allow', 'deny', 'order' and 'satisfy' have been
removed. When moving from 2.2 to 2.3 these directives will have to be
changed to 'Require all granted', 'Require all denied' or some variation
of the authz host-based providers.
- Existing third party authorization modules will have to adapt to the
new structure. |