def __init__(self, out_key, in_key):
self._enc_out = CHACHA20_POLY1305(out_key, '<STR_LIT>')<EOL>self._enc_in = CHACHA20_POLY1305(in_key, '<STR_LIT>')<EOL>self._out_counter = <NUM_LIT:0><EOL>self._in_counter = <NUM_LIT:0><EOL>
Initialize a new Chacha20Cipher.