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Class: Win32::SSPI::SecurityBuffer

Relationships & Source Files
Inherits: Object
Defined in: ext/win32/lib/win32/sspi.rb

Overview

Creates binary representaiton of a SecBufferDesc structure, including the SecBuffer contained inside.

Constant Summary

Class Method Summary

Instance Method Summary

Constructor Details

.new(buffer = nil) ⇒ SecurityBuffer

[ GitHub ]

  
# File 'ext/win32/lib/win32/sspi.rb', line 85

def initialize(buffer = nil)
	@buffer = buffer || "\0" * TOKENBUFSIZE
	@bufferSize = @buffer.length
	@type = SECBUFFER_TOKEN
end

Instance Method Details

#bufferSize

[ GitHub ]

  
# File 'ext/win32/lib/win32/sspi.rb', line 91

def bufferSize
	unpack
	@bufferSize
end

#bufferType

[ GitHub ]

  
# File 'ext/win32/lib/win32/sspi.rb', line 96

def bufferType
	unpack
	@type
end

#to_p

[ GitHub ]

  
# File 'ext/win32/lib/win32/sspi.rb', line 106

def to_p
	# Assumption is that when to_p is called we are going to get a packed structure. Therefore,
	# set @unpacked back to nil so we know to unpack when accessors are next accessed.
	@unpacked = nil
	# Assignment of inner structure to variable is very important here. Without it,
	# will not be able to unpack changes to the structure. Alternative, nested unpacks,
	# does not work (i.e. @struct.unpack("LLP12")[2].unpack("LLP12") results in "no associated pointer")
	@sec_buffer ||= [@bufferSize, @type, @buffer].pack("LLP")
	@struct ||= [SECBUFFER_VERSION, 1, @sec_buffer].pack("LLP")
end

#token

[ GitHub ]

  
# File 'ext/win32/lib/win32/sspi.rb', line 101

def token
	unpack
	@buffer
end

#unpack (private)

Unpacks the SecurityBufferDesc structure into member variables. We only want to do this once per struct, so the struct is deleted after unpacking.

[ GitHub ]

  
# File 'ext/win32/lib/win32/sspi.rb', line 122

def unpack
	if ! @unpacked && @sec_buffer && @struct
		@bufferSize, @type = @sec_buffer.unpack("LL")
		@buffer = @sec_buffer.unpack("LLP#{@bufferSize}")[2]
		@struct = nil
		@sec_buffer = nil
		@unpacked = true
	end
end