Not converting timestamp to python dates helps

crypt4gh/cli.py

@@ -134,8 +134,6 @@ def retrieve_private_key(args, generate=False):
     return get_private_key(seckeypath, cb)
 
 def make_timestamp(date):
-    # if date.startswith('+'):
-    #     return int((datetime.datetime.now(datetime.UTC) + parse_deltatime(date[1:])).timestamp())
     LOG.debug("expiration: %s", date)
     return int(datetime.datetime.fromisoformat(date).timestamp())
 

crypt4gh/header.py

@@ -184,7 +184,8 @@ def make_packet_timestamp(timestamp):
 def parse_timestamp_packet(packet):
     if len(packet) != 8:
         raise ValueError('Invalid timestamp packet')
-    return datetime.datetime.fromtimestamp(int.from_bytes(packet, byteorder='little'), datetime.UTC)
+    # return datetime.datetime.fromtimestamp(int.from_bytes(packet, byteorder='little'))
+    return int.from_bytes(packet, byteorder='little')
 
 # -------------------------------------
 # link packet

crypt4gh/lib.py

@@ -7,6 +7,7 @@
 import collections
 from itertools import chain
 import datetime
+import time
 
 from nacl.bindings import (crypto_aead_chacha20poly1305_ietf_encrypt,
                            crypto_aead_chacha20poly1305_ietf_decrypt)
@@ -397,8 +398,8 @@ def decrypt(keys, infile, outfile, sender_pubkey=None, offset=0, span=None):
 
     session_keys, edit_list, expiration, uri = header.deconstruct(infile, keys, sender_pubkey=sender_pubkey)
 
-    if expiration and (datetime.datetime.fromtimestamp(time.time()) > expiration):
-        raise ValueError(f'Expired on {expiration}')
+    if expiration and (time.time() > expiration): # now > expiration_timestamp
+        raise ValueError(f'Expired on {datetime.datetime.fromtimestamp(expiration)}')
 
     # Infile in now positioned at the beginning of the data portion
     # or we fetch the data portion from the URI.