Module: KRB5::Mixin::Unpacker

Included in:
KeytabParser
Defined in:
lib/krb5/mixin/unpacker.rb

Instance Method Summary collapse

Instance Method Details

#unpack_bytes(length) ⇒ Array

Unpack raw bytes

Parameters:

  • length (Integer) —

    number of bytes to unpack

Returns:

  • (Array) —

    raw bytes



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# File 'lib/krb5/mixin/unpacker.rb', line 25

def unpack_bytes(length)
  data = bytes[@index, length]
  @index += length

  data
end

#unpack_data ⇒ String

Generic method to unpack Kerberos data

data ::=

length (16 bits)
value (length bytes)

See: web.mit.edu/kerberos/krb5-1.16/doc/formats/keytab_file_format.html

Returns:

  • (String) 


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# File 'lib/krb5/mixin/unpacker.rb', line 14

def unpack_data
  length = unpack_int16
  data = unpack_bytes(length)
end

#unpack_int16 ⇒ Object 



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# File 'lib/krb5/mixin/unpacker.rb', line 39

def unpack_int16
  data = bytes[@index, 2].unpack('s>').first
  @index += 2

  data
end

#unpack_int32 ⇒ Object 



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# File 'lib/krb5/mixin/unpacker.rb', line 46

def unpack_int32
  data = bytes[@index, 4].unpack('l>').first
  @index += 4

  data
end

#unpack_int8 ⇒ Object 



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# File 'lib/krb5/mixin/unpacker.rb', line 32

def unpack_int8
  data = bytes[@index].unpack('c').first
  @index += 1

  data
end