commit 56b4b77bfa2b063b3f3686b54d8e39f6bce1d2a0
Author:     Thomas Deutschmann <whissi@whissi.de>
AuthorDate: Wed Jun 2 17:40:06 2021 +0200
Commit:     Thomas Deutschmann <whissi@whissi.de>
CommitDate: Wed Jun 2 18:01:16 2021 +0200

    Use decodebytes instead of decodestring in Python 3.9
    
    base64.decodestring(), alias deprecated since Python 3.1, has been removed
    in Python 3.9 in favor of new base64.decodebytes() function [Link 1].
    
    Link 1: https://docs.python.org/3.9/whatsnew/3.9.html#removed
    Closes: https://github.com/jirutka/ssh-ldap-pubkey/issues/49

diff --git a/ssh_ldap_pubkey/__init__.py b/ssh_ldap_pubkey/__init__.py
index 5da2ade..d80b335 100644
--- a/ssh_ldap_pubkey/__init__.py
+++ b/ssh_ldap_pubkey/__init__.py
@@ -39,8 +39,14 @@ def is_valid_openssh_pubkey(pubkey):
         key_type, data64 = map(_encode, pubkey.split()[0:2])
     except (ValueError, AttributeError):
         return False
+
+    if hasattr(base64, "decodebytes"):
+        decodebytes = base64.decodebytes
+    else:
+        decodebytes = base64.decodestring
+
     try:
-        data = base64.decodestring(data64)
+        data = decodebytes(data64)
     except base64.binascii.Error:
         return False