Class: BinData::Transform::Xor

Inherits:

IO::Transform

• Object
• IO::Transform
• BinData::Transform::Xor

Defined in:

lib/bindata/transform/xor.rb

Overview

Transforms the data stream by xoring each byte.

Instance Method Summary

• #initialize(xor) ⇒ Xor constructor

  A new instance of Xor.

• #read(n) ⇒ Object
• #write(data) ⇒ Object

Methods inherited from IO::Transform

#after_read_transform, #after_write_transform, #before_transform, #num_bytes_remaining, #offset, #prepend_to_chain, #seek_abs, #seekable?, #skip, transform_changes_stream_length!

Constructor Details

#initialize(xor) ⇒ Xor

Returns a new instance of Xor.

# File 'lib/bindata/transform/xor.rb', line 5

def initialize(xor)
  super()
  @xor = xor
end

Instance Method Details

#read(n) ⇒ Object

# File 'lib/bindata/transform/xor.rb', line 10

def read(n)
  chain_read(n).bytes.map { |byte| (byte ^ @xor).chr }.join
end

#write(data) ⇒ Object

# File 'lib/bindata/transform/xor.rb', line 14

def write(data)
  chain_write(data.bytes.map { |byte| (byte ^ @xor).chr }.join)
end