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module Net
module NTLM
SSP_SIGN = "NTLMSSP\0"
# See [2.2.2.5 NEGOTIATE](https://msdn.microsoft.com/en-us/library/cc236650.aspx)
FLAGS = {
:UNICODE => 0x00000001,
:OEM => 0x00000002,
:REQUEST_TARGET => 0x00000004,
:SIGN => 0x00000010,
:SEAL => 0x00000020,
:NEG_DATAGRAM => 0x00000040,
:NEG_LM_KEY => 0x00000080,
:NTLM => 0x00000200,
:NEG_ANONYMOUS => 0x00000800,
:DOMAIN_SUPPLIED => 0x00001000,
:WORKSTATION_SUPPLIED => 0x00002000,
:ALWAYS_SIGN => 0x00008000,
:TARGET_TYPE_DOMAIN => 0x00010000,
:TARGET_TYPE_SERVER => 0x00020000,
:NTLM2_KEY => 0x00080000,
:NEG_IDENTIFY => 0x00100000,
:NON_NT_SESSION_KEY => 0x00400000,
:TARGET_INFO => 0x00800000,
:NEG_VERSION => 0x02000000,
:KEY128 => 0x20000000,
:KEY_EXCHANGE => 0x40000000,
:KEY56 => 0x80000000,
# Undocumented flags:
:MBZ9 => 0x00000008,
:NETWARE => 0x00000100,
:NEG_NT_ONLY => 0x00000400,
:MBZ7 => 0x00000800, # alias for :NEG_ANONYMOUS
:LOCAL_CALL => 0x00004000,
}.freeze
FLAG_KEYS = FLAGS.keys.sort{|a, b| FLAGS[a] <=> FLAGS[b] }
DEFAULT_FLAGS = {
:TYPE1 => FLAGS[:UNICODE] | FLAGS[:OEM] | FLAGS[:REQUEST_TARGET] | FLAGS[:NTLM] | FLAGS[:ALWAYS_SIGN] | FLAGS[:NTLM2_KEY],
:TYPE2 => FLAGS[:UNICODE],
:TYPE3 => FLAGS[:UNICODE] | FLAGS[:REQUEST_TARGET] | FLAGS[:NTLM] | FLAGS[:ALWAYS_SIGN] | FLAGS[:NTLM2_KEY]
}
# @private false
class Message < FieldSet
class << Message
def parse(str)
m = Type0.new
m.parse(str)
case m.type
when 1
t = Type1.new.parse(str)
when 2
t = Type2.new.parse(str)
when 3
t = Type3.new.parse(str)
else
raise ArgumentError, "unknown type: #{m.type}"
end
t
end
def decode64(str)
parse(Base64.decode64(str))
end
end
# @return [self]
def parse(str)
super
while has_disabled_fields? && serialize.size < str.size
# enable the next disabled field
self.class.names.find { |name| !self[name].active && enable(name) }
super
end
self
end
def has_flag?(flag)
(self[:flag].value & FLAGS[flag]) == FLAGS[flag]
end
def set_flag(flag)
self[:flag].value |= FLAGS[flag]
end
def dump_flags
FLAG_KEYS.each{ |k| print(k, "=", has_flag?(k), "\n") }
end
def serialize
deflag
super + security_buffers.map{|n, f| f.value + (has_flag?(:UNICODE) ? "\x00".b * (f.value.length % 2) : '')}.join
end
def encode64
Base64.encode64(serialize).gsub(/\n/, '')
end
def decode64(str)
parse(Base64.decode64(str))
end
alias head_size size
def data_size
security_buffers.inject(0){|sum, a| sum += a[1].data_size}
end
def size
head_size + data_size
end
def security_buffers
@alist.find_all{|n, f| f.instance_of?(SecurityBuffer)}
end
def deflag
security_buffers.inject(head_size){|cur, a|
a[1].offset = cur
cur += a[1].data_size
has_flag?(:UNICODE) ? cur + cur % 2 : cur
}
end
def data_edge
security_buffers.map{ |n, f| f.active ? f.offset : size}.min
end
end
end
end
|
