module RbNaCl::Util

def zero_pad(n, message)

Returns:

(String) - A string, n bytes long

Raises:

(RbNaCl::LengthError) - If the string is too long

Parameters:

message (String) -- the message to be padded
n (Integer) -- The length of the resulting string

def zero_pad(n, message)
  len = message.bytesize
  if len == n
    message
  elsif len > n
    raise LengthError, "String too long for zero-padding to #{n} bytes"
  else
    message + zeros(n - len)
  end
end

Instance Methods