File size: 1,652 Bytes
7475f0d | 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 50 51 52 53 54 55 56 57 58 | import base64
import logging
from hashlib import blake2b
from socket import gethostname
from typing import Optional
from typing import Union
logger = logging.getLogger(__name__)
def get_hostname(hash: bool = False, pepper: Optional[str] = None) -> str:
"""
Return the hostname for the current machine.
Args:
hash: Whether to hash the hostname.
pepper: Optional pepper for additional security (base64 encoded)
Returns:
The hostname.
"""
try:
hostname = gethostname()
if not hostname:
logger.info("socket.gethostname returned an empty value")
except Exception as e:
logger.info(f"socket.gethostname raised an exception: {e}")
hostname = ""
if hostname.endswith(".local"):
hostname = hostname.rsplit(".", 1)[0]
if hash:
hostname = hash_string("hostname", hostname, pepper)
return hostname
def hash_string(what: str, s: str, pepper: Optional[Union[str, bytes]] = None) -> str:
"""
Return the hashed string for the current machine.
Args:
what: The what to hash (example: "hostname").
s: The string to hash.
pepper: Optional pepper for additional security (base64 encoded)
Returns:
Hashed string
"""
if isinstance(pepper, str):
pepper = pepper.encode("utf-8")
pepper = (pepper or b"")[: blake2b.SALT_SIZE]
person = what.encode("utf-8")
hfunc = blake2b(s.encode("utf-8"), digest_size=16, person=person, salt=pepper) # type: ignore
data = hfunc.digest()
result = base64.urlsafe_b64encode(data).strip(b"=").decode("ascii")
return result
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