Added type annotations + some fixes to get them correct

One functional change: `CryptoOperation.read_infile()` now reads bytes
from `sys.stdin` instead of text. This is necessary to be consistent with
the rest of the code, which all deals with bytes.

1 files changed, 2 insertions, 5 deletions

diff --git a/rsa/_compat.py b/rsa/_compat.py
index 843583c..b31331e 100644
--- a/rsa/_compat.py
+++ b/rsa/_compat.py
@@ -21,14 +21,11 @@ import sys
 from struct import pack
 
 
-def byte(num):## XXX
+def byte(num: int):
     """
     Converts a number between 0 and 255 (both inclusive) to a base-256 (byte)
     representation.
 
-    Use it as a replacement for ``chr`` where you are expecting a byte
-    because this will work on all current versions of Python::
-
     :param num:
         An unsigned integer between 0 and 255 (both inclusive).
     :returns:
@@ -37,7 +34,7 @@ def byte(num):## XXX
     return pack("B", num)
 
 
-def xor_bytes(b1, b2):
+def xor_bytes(b1: bytes, b2: bytes) -> bytes:
     """
     Returns the bitwise XOR result between two bytes objects, b1 ^ b2.