Module: Puppet::Util::Windows::SID

Extended by:
FFI::Library
Included in:
AccessControlEntry, SecurityDescriptor
Defined in:
lib/puppet/util/windows.rb,
lib/puppet/util/windows/sid.rb,
lib/puppet/util/windows/principal.rb

Defined Under Namespace

Classes: Principal

Constant Summary collapse

ERROR_NONE_MAPPED =

missing from Windows::Error

1332
ERROR_INVALID_SID_STRUCTURE = 
1337
ERROR_TRUSTED_DOMAIN_FAILURE = 
1788
ERROR_TRUSTED_RELATIONSHIP_FAILURE = 
1789
Null =

Well Known SIDs

'S-1-0'
Nobody = 
'S-1-0-0'
World = 
'S-1-1'
Everyone = 
'S-1-1-0'
Local = 
'S-1-2'
Creator = 
'S-1-3'
CreatorOwner = 
'S-1-3-0'
CreatorGroup = 
'S-1-3-1'
CreatorOwnerServer = 
'S-1-3-2'
CreatorGroupServer = 
'S-1-3-3'
NonUnique = 
'S-1-4'
Nt = 
'S-1-5'
Dialup = 
'S-1-5-1'
Network = 
'S-1-5-2'
Batch = 
'S-1-5-3'
Interactive = 
'S-1-5-4'
Service = 
'S-1-5-6'
Anonymous = 
'S-1-5-7'
Proxy = 
'S-1-5-8'
EnterpriseDomainControllers = 
'S-1-5-9'
PrincipalSelf = 
'S-1-5-10'
AuthenticatedUsers = 
'S-1-5-11'
RestrictedCode = 
'S-1-5-12'
TerminalServerUsers = 
'S-1-5-13'
LocalSystem = 
'S-1-5-18'
NtLocal = 
'S-1-5-19'
NtNetwork = 
'S-1-5-20'
BuiltinAdministrators = 
'S-1-5-32-544'
BuiltinUsers = 
'S-1-5-32-545'
Guests = 
'S-1-5-32-546'
PowerUsers = 
'S-1-5-32-547'
AccountOperators = 
'S-1-5-32-548'
ServerOperators = 
'S-1-5-32-549'
PrintOperators = 
'S-1-5-32-550'
BackupOperators = 
'S-1-5-32-551'
Replicators = 
'S-1-5-32-552'
AllAppPackages = 
'S-1-15-2-1'
MAXIMUM_SID_STRING_LENGTH =

stackoverflow.com/a/1792930 - 68 bytes, 184 characters in a string

184

Class Method Summary collapse

Class Method Details

.ads_to_principal(ads_object) ⇒ Object

Converts a COM instance of IAdsUser or IAdsGroup to a SID::Principal object, Raises an Error for nil or an object without an objectSID / Name property. This method returns a SID::Principal with the account, domain, SID, etc This method will return instances even when the SID is unresolvable, as may be the case when domain users have been added to local groups, but removed from the domain



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# File 'lib/puppet/util/windows/sid.rb', line 116

def ads_to_principal(ads_object)
  if !ads_object || !ads_object.respond_to?(:ole_respond_to?) ||
     !ads_object.ole_respond_to?(:objectSID) || !ads_object.ole_respond_to?(:Name)
    raise Puppet::Error, "ads_object must be an IAdsUser or IAdsGroup instance"
  end

  octet_string_to_principal(ads_object.objectSID)
rescue Puppet::Util::Windows::Error => e
  # if the error is not a lookup / mapping problem, immediately re-raise
  raise if e.code != ERROR_NONE_MAPPED

  # if the Name property isn't formatted like a SID, OR
  if !valid_sid?(ads_object.Name) ||
     # if the objectSID doesn't match the Name property, also raise
     ((converted = octet_string_to_sid_string(ads_object.objectSID)) != ads_object.Name)
    raise Puppet::Error.new("ads_object Name: #{ads_object.Name} invalid or does not match objectSID: #{ads_object.objectSID} (#{converted})", e)
  end

  unresolved_principal(ads_object.Name, ads_object.objectSID)
end

.get_length_sid(sid_ptr) ⇒ Object 



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# File 'lib/puppet/util/windows/sid.rb', line 221

def get_length_sid(sid_ptr)
  # MSDN states IsValidSid should be called on pointer first
  if !sid_ptr.is_a?(FFI::Pointer) || IsValidSid(sid_ptr) == FFI::WIN32_FALSE
    raise Puppet::Util::Windows::Error, _("Invalid SID")
  end

  GetLengthSid(sid_ptr)
end

.name_to_principal(name, allow_unresolved = false) ⇒ Object Also known as: name_to_sid_object

Convert an account name, e.g. ‘Administrators’ into a Principal::SID object, e.g. ‘S-1-5-32-544’. The name can be specified as ‘Administrators’, ‘BUILTINAdministrators’, or ‘S-1-5-32-544’, and will return the SID object. Returns nil if the account doesn’t exist. This method returns a SID::Principal with the account, domain, SID, etc



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# File 'lib/puppet/util/windows/sid.rb', line 71

def name_to_principal(name, allow_unresolved = false)
  # Apparently, we accept a symbol..
  name = name.to_s.strip if name

  # if name is a SID string, convert it to raw bytes for use with lookup_account_sid
  raw_sid_bytes = nil
  begin
    string_to_sid_ptr(name) do |sid_ptr|
      raw_sid_bytes = sid_ptr.read_array_of_uchar(get_length_sid(sid_ptr))
    end
  rescue => e
    # Avoid debug logs pollution with valid account names
    # https://docs.microsoft.com/en-us/windows/win32/api/sddl/nf-sddl-convertstringsidtosidw#return-value
    Puppet.debug("Could not retrieve raw SID bytes from '#{name}': #{e.message}") unless e.code == ERROR_INVALID_SID_STRUCTURE
  end

  raw_sid_bytes ? Principal.(raw_sid_bytes) : Principal.(name)
rescue => e
  Puppet.debug(e.message.to_s)
  (allow_unresolved && raw_sid_bytes) ? unresolved_principal(name, raw_sid_bytes) : nil
end

.name_to_sid(name) ⇒ Object

Convert an account name, e.g. ‘Administrators’ into a SID string, e.g. ‘S-1-5-32-544’. The name can be specified as ‘Administrators’, ‘BUILTINAdministrators’, or ‘S-1-5-32-544’, and will return the SID. Returns nil if the account doesn’t exist.



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# File 'lib/puppet/util/windows/sid.rb', line 59

def name_to_sid(name)
  sid = name_to_principal(name)

  sid ? sid.sid : nil
end

.octet_string_to_principal(bytes) ⇒ Object Also known as: octet_string_to_sid_object

Converts an octet string array of bytes to a SID::Principal object, e.g. [1, 1, 0, 0, 0, 0, 0, 5, 18, 0, 0, 0] is the representation for S-1-5-18, the local ‘SYSTEM’ account. Raises an Error for nil or non-array input. This method returns a SID::Principal with the account, domain, SID, etc



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# File 'lib/puppet/util/windows/sid.rb', line 100

def octet_string_to_principal(bytes)
  if !bytes || !bytes.respond_to?('pack') || bytes.empty?
    raise Puppet::Util::Windows::Error, _("Octet string must be an array of bytes")
  end

  Principal.(bytes)
end

.octet_string_to_sid_string(sid_bytes) ⇒ Object 



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# File 'lib/puppet/util/windows/sid.rb', line 231

def octet_string_to_sid_string(sid_bytes)
  sid_string = nil

  FFI::MemoryPointer.new(:byte, sid_bytes.length) do |sid_ptr|
    sid_ptr.write_array_of_uchar(sid_bytes)
    sid_string = Puppet::Util::Windows::SID.sid_ptr_to_string(sid_ptr)
  end

  sid_string
end

.sid_ptr_to_string(psid) ⇒ Object

Convert a SID pointer to a SID string, e.g. “S-1-5-32-544”.



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# File 'lib/puppet/util/windows/sid.rb', line 161

def sid_ptr_to_string(psid)
  if !psid.is_a?(FFI::Pointer) || IsValidSid(psid) == FFI::WIN32_FALSE
    raise Puppet::Util::Windows::Error, _("Invalid SID")
  end

  sid_string = nil
  FFI::MemoryPointer.new(:pointer, 1) do |buffer_ptr|
    if ConvertSidToStringSidW(psid, buffer_ptr) == FFI::WIN32_FALSE
      raise Puppet::Util::Windows::Error, _("Failed to convert binary SID")
    end

    buffer_ptr.read_win32_local_pointer do |wide_string_ptr|
      if wide_string_ptr.null?
        raise Puppet::Error, _("ConvertSidToStringSidW failed to allocate buffer for sid")
      end

      sid_string = wide_string_ptr.read_arbitrary_wide_string_up_to(MAXIMUM_SID_STRING_LENGTH)
    end
  end

  sid_string
end

.sid_to_name(value) ⇒ Object

Convert a SID string, e.g. “S-1-5-32-544” to a name, e.g. ‘BUILTINAdministrators’. Returns nil if an account for that SID does not exist.



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# File 'lib/puppet/util/windows/sid.rb', line 141

def sid_to_name(value)
  sid_bytes = []
  begin
    string_to_sid_ptr(value) do |ptr|
      sid_bytes = ptr.read_array_of_uchar(get_length_sid(ptr))
    end
  rescue Puppet::Util::Windows::Error => e
    raise if e.code != ERROR_INVALID_SID_STRUCTURE
  end

  Principal.(sid_bytes).
rescue
  nil
end

.string_to_sid_ptr(string_sid, &block) ⇒ Object

Convert a SID string, e.g. “S-1-5-32-544” to a pointer (containing the address of the binary SID structure). The returned value can be used in Win32 APIs that expect a PSID, e.g. IsValidSid. The account for this SID may or may not exist.



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# File 'lib/puppet/util/windows/sid.rb', line 189

def string_to_sid_ptr(string_sid, &block)
  FFI::MemoryPointer.from_string_to_wide_string(string_sid) do |lpcwstr|
    FFI::MemoryPointer.new(:pointer, 1) do |sid_ptr_ptr|
      if ConvertStringSidToSidW(lpcwstr, sid_ptr_ptr) == FFI::WIN32_FALSE
        raise Puppet::Util::Windows::Error, _("Failed to convert string SID: %{string_sid}") % { string_sid: string_sid }
      end

      sid_ptr_ptr.read_win32_local_pointer do |sid_ptr|
        yield sid_ptr
      end
    end
  end

  # yielded sid_ptr has already had LocalFree called, nothing to return
  nil
end

.unresolved_principal(name, sid_bytes) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/util/windows/sid.rb', line 244

def self.unresolved_principal(name, sid_bytes)
  Principal.new(
    name, # account
    sid_bytes, # sid_bytes
    name, # sid string
    nil, # domain
    # https://msdn.microsoft.com/en-us/library/cc245534.aspx?f=255&MSPPError=-2147217396
    # Indicates that the type of object could not be determined. For example, no object with that SID exists.
    :SidTypeUnknown
  )
end

.valid_sid?(string_sid) ⇒ Boolean

Return true if the string is a valid SID, e.g. “S-1-5-32-544”, false otherwise.

Returns:

  • (Boolean) 


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# File 'lib/puppet/util/windows/sid.rb', line 208

def valid_sid?(string_sid)
  valid = false

  begin
    string_to_sid_ptr(string_sid) { |ptr| valid = !ptr.nil? && !ptr.null? }
  rescue Puppet::Util::Windows::Error => e
    raise if e.code != ERROR_INVALID_SID_STRUCTURE
  end

  valid
end