commit bd0ccc5fe77d55f7a19f5278d6b60587c393ee3c
author arithmetic1728 <58957152+arithmetic1728@users.noreply.github.com> Mon Nov 01 10:22:26 2021 -0700
committer GitHub <noreply@github.com> Mon Nov 01 10:22:26 2021 -0700
tree acc18447e4e9c8df9bb8b6c18cdaa4a0d1a7d4cd
parent 194c64acbcbed95ffcffe00ec09ca10da1081dd7

fix: use 'int.to_bytes' and 'int.from_bytes' for py3 (#904)

google/auth/crypt/es256.py

diff --git a/google/auth/crypt/es256.py b/google/auth/crypt/es256.py
index c6d6176..42823a7 100644
--- a/google/auth/crypt/es256.py
+++ b/google/auth/crypt/es256.py
@@ -53,8 +53,16 @@
         sig_bytes = _helpers.to_bytes(signature)
         if len(sig_bytes) != 64:
             return False
-        r = utils.int_from_bytes(sig_bytes[:32], byteorder="big")
-        s = utils.int_from_bytes(sig_bytes[32:], byteorder="big")
+        r = (
+            int.from_bytes(sig_bytes[:32], byteorder="big")
+            if _helpers.is_python_3()
+            else utils.int_from_bytes(sig_bytes[:32], byteorder="big")
+        )
+        s = (
+            int.from_bytes(sig_bytes[32:], byteorder="big")
+            if _helpers.is_python_3()
+            else utils.int_from_bytes(sig_bytes[32:], byteorder="big")
+        )
         asn1_sig = encode_dss_signature(r, s)
 
         message = _helpers.to_bytes(message)
@@ -121,7 +129,11 @@
 
         # Convert ASN1 encoded signature to (r||s) raw signature.
         (r, s) = decode_dss_signature(asn1_signature)
-        return utils.int_to_bytes(r, 32) + utils.int_to_bytes(s, 32)
+        return (
+            (r.to_bytes(32, byteorder="big") + s.to_bytes(32, byteorder="big"))
+            if _helpers.is_python_3()
+            else (utils.int_to_bytes(r, 32) + utils.int_to_bytes(s, 32))
+        )
 
     @classmethod
     def from_string(cls, key, key_id=None):