root / pithos / backends / lib / permissions.py @ 6f4bce7b
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# Copyright 2011 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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from xfeatures import XFeatures |
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from groups import Groups |
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from public import Public |
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READ = 0
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WRITE = 1
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class Permissions(XFeatures, Groups, Public): |
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def __init__(self, **params): |
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XFeatures.__init__(self, **params)
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Groups.__init__(self, **params)
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Public.__init__(self, **params)
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def access_grant(self, path, access, members=()): |
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"""Grant members with access to path."""
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feature = self.xfeature_create(path)
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if feature is None: |
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return
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self.feature_setmany(feature, access, members)
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def access_revoke_all(self, path): |
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"""Revoke access to path."""
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self.xfeature_destroy(path)
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def access_check(self, path, access, member): |
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"""Return true if the member has this access to the path."""
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if access == READ and self.public_check(path): |
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return True |
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r = self.xfeature_inherit(path)
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if not r: |
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return False |
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fpath, feature = r |
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members = self.feature_get(feature, access)
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if member in members or '*' in members: |
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return True |
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for owner, group in self.group_parents(self, member): |
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if owner + ':' + group in members: |
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return True |
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return True |
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def access_inherit(self, path): |
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"""Return the inherited or assigned (path, permissions) pair for path."""
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r = self.xfeature_inherit(path)
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if not r: |
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return (path, {})
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fpath, feature = r |
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return (fpath, self.feature_dict(feature)) |
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def access_list(self, path): |
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"""List all permission paths inherited by or inheriting from path."""
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return [x[0] for x in self.xfeature_list(path) if x[0] != path] |
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def access_list_paths(self, member, prefix=None): |
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"""Return the list of paths granted to member."""
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q = ("select distinct path from xfeatures inner join "
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" (select distinct feature_id, key from xfeaturevals inner join "
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" (select owner || ':' || name as value from members "
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" where member = ? union select ?) "
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" using (value)) "
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"using (feature_id)")
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p = (member, member) |
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if prefix:
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q += " where path like ?"
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p += (prefix + '%',)
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self.execute(q, p)
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return [r[0] for r in self.fetchall()] |
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def access_list_shared(self, prefix=''): |
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"""Return the list of shared paths."""
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q = "select path from xfeatures where path like ?"
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self.execute(q, (prefix + '%',)) |
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return [r[0] for r in self.fetchall()] |