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#
# Author:: John Keiser (<jkeiser@chef.io>)
# Copyright:: Copyright 2011-2016, Chef Software Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require_relative "../security"
require_relative "sid"
require_relative "../memory"
require "ffi"
class Chef
module ReservedNames::Win32
class Security
class ACE
def initialize(pointer, owner = nil)
if Chef::ReservedNames::Win32::API::Security::ACE_WITH_MASK_AND_SID.supports?(pointer.read_uchar)
@struct = Chef::ReservedNames::Win32::API::Security::ACE_WITH_MASK_AND_SID.new pointer
else
# TODO Support ALL the things
@struct = Chef::ReservedNames::Win32::API::Security::ACE_HEADER.new pointer
end
# Keep a reference to the actual owner of this memory so we don't get freed
@owner = owner
end
def self.size_with_sid(sid)
Chef::ReservedNames::Win32::API::Security::ACE_WITH_MASK_AND_SID.offset_of(:SidStart) + sid.size
end
def self.access_allowed(sid, mask, flags = 0)
create_ace_with_mask_and_sid(Chef::ReservedNames::Win32::API::Security::ACCESS_ALLOWED_ACE_TYPE, flags, mask, sid)
end
def self.access_denied(sid, mask, flags = 0)
create_ace_with_mask_and_sid(Chef::ReservedNames::Win32::API::Security::ACCESS_DENIED_ACE_TYPE, flags, mask, sid)
end
attr_reader :struct
def ==(other)
type == other.type && flags == other.flags && mask == other.mask && sid == other.sid
end
def dup
ACE.create_ace_with_mask_and_sid(type, flags, mask, sid)
end
def flags
struct[:AceFlags]
end
def flags=(val)
struct[:AceFlags] = val
end
def explicit?
! inherited?
end
def inherited?
(struct[:AceFlags] & Chef::ReservedNames::Win32::API::Security::INHERITED_ACE) != 0
end
def mask
struct[:Mask]
end
def mask=(val)
struct[:Mask] = val
end
def pointer
struct.pointer
end
def size
struct[:AceSize]
end
def sid
# The SID runs off the end of the structure, starting at :SidStart.
# Use pointer arithmetic to get a pointer to that location.
Chef::ReservedNames::Win32::Security::SID.new(struct.pointer + struct.offset_of(:SidStart))
end
def to_s
"#{sid.account_name}/flags:#{flags.to_s(16)}/mask:#{mask.to_s(16)}"
end
def type
struct[:AceType]
end
def self.create_ace_with_mask_and_sid(type, flags, mask, sid)
size_needed = size_with_sid(sid)
pointer = FFI::MemoryPointer.new size_needed
struct = Chef::ReservedNames::Win32::API::Security::ACE_WITH_MASK_AND_SID.new pointer
struct[:AceType] = type
struct[:AceFlags] = flags
struct[:AceSize] = size_needed
struct[:Mask] = mask
Chef::ReservedNames::Win32::Memory.memcpy(struct.pointer + struct.offset_of(:SidStart), sid.pointer, sid.size)
ACE.new(struct.pointer)
end
end
end
end
end
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