Module: JWK::Utils

Defined in:
lib/jwk/utils.rb

Class Method Summary collapse

Class Method Details

.binary_to_int(s) ⇒ Object 



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# File 'lib/jwk/utils.rb', line 17

def binary_to_int(s)
  s.chars.inject(0) do |val, char|
    (val << 8) | char[0].ord
  end
end

.decode_ub64(data) ⇒ Object 



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# File 'lib/jwk/utils.rb', line 23

def decode_ub64(data)
  clean = data.gsub(/[[:space:]]/, '')

  len = clean.length
  padded = (len % 4).zero? ? clean : clean + '=' * (4 - len % 4)

  Base64.urlsafe_decode64(padded)
end

.decode_ub64_int(data) ⇒ Object 



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# File 'lib/jwk/utils.rb', line 32

def decode_ub64_int(data)
  Utils.binary_to_int(decode_ub64(data))
end

.encode_ub64_int(n) ⇒ Object 



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# File 'lib/jwk/utils.rb', line 36

def encode_ub64_int(n)
  Base64.urlsafe_encode64(Utils.int_to_binary(n))
end

.hex_string_to_binary(s) ⇒ Object 



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# File 'lib/jwk/utils.rb', line 4

def hex_string_to_binary(s)
  s.scan(/.{2}/).map { |n| n.to_i(16).chr }.join
end

.int_to_binary(n) ⇒ Object 



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# File 'lib/jwk/utils.rb', line 8

def int_to_binary(n)
  num_octets = (n.to_s(16).length / 2.0).ceil

  shifted = n << 8
  Array.new(num_octets) do
    ((shifted >>= 8) & 0xFF).chr
  end.join.reverse
end