Class: Kdbx::Header
- Inherits:
-
Object
- Object
- Kdbx::Header
- Extended by:
- Forwardable
- Defined in:
- lib/kdbx/header.rb
Constant Summary collapse
- FILEMAGIC =
"\x03\xD9\xA2\x9A\x67\xFB\x4B\xB5\x01\x00\x03\x00".b
Class Method Summary collapse
Instance Method Summary collapse
- #dump ⇒ Object
-
#initialize(fields = {}) ⇒ Header
constructor
A new instance of Header.
- #validate ⇒ Object
Constructor Details
#initialize(fields = {}) ⇒ Header
Returns a new instance of Header.
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# File 'lib/kdbx/header.rb', line 25 def initialize(fields = {}) @fields = fields validate end |
Class Method Details
.load(file) ⇒ Object
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# File 'lib/kdbx/header.rb', line 7 def self.load(file) if file.readpartial(12) != FILEMAGIC fail ParseError, "bad magic number" end fields = {} loop do (id, sz) = file.readpartial(3).unpack("CS<") fields[id] = file.readpartial sz break if id == 0 end new fields rescue TypeError, EOFError fail ParseError, "truncated header" end |
Instance Method Details
#dump ⇒ Object
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# File 'lib/kdbx/header.rb', line 30 def dump merge_defaults and validate StringIO.new.binmode.tap do |io| io.write FILEMAGIC @fields.each do |k, v| io.write [k, v.bytesize].pack("CS<") + v if k != 0 end io.write [0, @fields[0].bytesize].pack("CS<") + @fields[0] end.string end |
#validate ⇒ Object
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# File 'lib/kdbx/header.rb', line 41 def validate @fields.each do |k, v| fail FormatError, "header #{k.inspect}: #{v}" unless k.is_a? Integer fail FormatError, "header #{k}: #{v.inspect}" unless v.is_a? String @fields[k] = v = v.b unless v.encoding == Encoding::ASCII_8BIT case k when 2 if v != "\x31\xC1\xF2\xE6\xBF\x71\x43\x50\xBE\x58\x05\x21\x6A\xFC\x5A\xFF".b fail FormatError, "header #{k}: #{v.inspect}" end when 3 if v.bytesize != 4 || !(0..1).include?(v.unpack("L").first) fail FormatError, "header #{k}: #{v.inspect}" end when 4, 5 fail FormatError, "header #{k}: #{v.inspect}" if v.bytesize != 32 when 6 fail FormatError, "header #{k}: #{v.inspect}" if v.bytesize != 8 when 7 fail FormatError, "header #{k}: #{v.inspect}" if v.bytesize != 16 when 8 if @fields[10] == "\x02\x00\x00\x00".b && v.bytesize != 32 fail FormatError, "header #{k}: #{v.inspect}" end when 10 fail FormatError, "header #{k}: #{v.inspect}" if v.bytesize != 4 if (n = v.unpack("L<").first) != 0 && n != 2 fail FormatError, "header #{k}: #{v.inspect}" end end end end |