Fix.

yafn/yafn.py

@@ -808,7 +808,9 @@ class Connection:
     if size > 1024:
       raise YAFNError
 
+    message = self._recvall(size)
     message = RSA_AES_hybrid_decrypt(message, key, self._peer.keypair)
+
     if adler32(message) != checksum:
       raise YAFNError