1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
"""Utils for server handling."""
from __future__ import annotations
from datetime import UTC, datetime, timedelta
import json
from typing import NotRequired, TypedDict
from cryptography.fernet import Fernet, MultiFernet
MAX_READ_SIZE = 4_096
MAX_BUFFER_SIZE = 1_024_000
PROTOCOL_VERSION = 1
DEFAULT_PROTOCOL_VERSION = 0
class TokenData(TypedDict):
"""Token data."""
valid: float
hostname: str
aes_key: str
aes_iv: str
protocol_version: NotRequired[int]
alias: list[str] | None
def generate_client_token(
tokens: list[str],
valid_delta: timedelta,
hostname: str,
aes_key: bytes,
aes_iv: bytes,
) -> bytes:
"""Generate a token for client."""
fernet = MultiFernet([Fernet(key) for key in tokens])
valid = datetime.now(tz=UTC) + valid_delta
return fernet.encrypt(
json.dumps(
{
"valid": valid.timestamp(),
"hostname": hostname,
"aes_key": aes_key.hex(),
"aes_iv": aes_iv.hex(),
"protocol_version": PROTOCOL_VERSION,
},
).encode(),
)
|
