Switch to using ChaCha20Poly1305Reusable for encryption

The ChaCha20Poly1305 that comes with cryptography recreates the
ctx every time encrypt is called.  Since we call encrypt in
 a loop, we can avoid this overhead by using ChaCha20Poly1305Reusable
instead as we are doing everything in the same thread and not concerned
about thread safety

pyhap/hap_crypto.py

@@ -4,7 +4,7 @@
 
 from cryptography.hazmat.backends import default_backend
 from cryptography.hazmat.primitives import hashes
-from cryptography.hazmat.primitives.ciphers.aead import ChaCha20Poly1305
+from chacha20poly1305_reuseable import ChaCha20Poly1305Reusable as ChaCha20Poly1305
 from cryptography.hazmat.primitives.kdf.hkdf import HKDF
 
 logger = logging.getLogger(__name__)

pyhap/hap_handler.py

@@ -12,7 +12,7 @@
 from cryptography.exceptions import InvalidSignature, InvalidTag
 from cryptography.hazmat.primitives import serialization
 from cryptography.hazmat.primitives.asymmetric import ed25519, x25519
-from cryptography.hazmat.primitives.ciphers.aead import ChaCha20Poly1305
+from chacha20poly1305_reuseable import ChaCha20Poly1305Reusable as ChaCha20Poly1305
 
 from pyhap import tlv
 from pyhap.const import (

setup.py

@@ -22,7 +22,7 @@
     README = f.read()
 
 
-REQUIRES = ["cryptography", "zeroconf>=0.36.2", "h11"]
+REQUIRES = ["cryptography", "chacha20poly1305-reuseable", "zeroconf>=0.36.2", "h11"]
 
 
 setup(