File size: 5,953 Bytes
e3278e4 |
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 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 |
# What is this?
## If litellm license in env, checks if it's valid
import base64
import json
import os
from datetime import datetime
from typing import Optional
import httpx
from litellm._logging import verbose_proxy_logger
from litellm.llms.custom_httpx.http_handler import HTTPHandler
class LicenseCheck:
"""
- Check if license in env
- Returns if license is valid
"""
base_url = "https://license.litellm.ai"
def __init__(self) -> None:
self.license_str = os.getenv("LITELLM_LICENSE", None)
verbose_proxy_logger.debug("License Str value - {}".format(self.license_str))
self.http_handler = HTTPHandler(timeout=15)
self.public_key = None
self.read_public_key()
def read_public_key(self):
try:
from cryptography.hazmat.primitives import serialization
# current dir
current_dir = os.path.dirname(os.path.realpath(__file__))
# check if public_key.pem exists
_path_to_public_key = os.path.join(current_dir, "public_key.pem")
if os.path.exists(_path_to_public_key):
with open(_path_to_public_key, "rb") as key_file:
self.public_key = serialization.load_pem_public_key(key_file.read())
else:
self.public_key = None
except Exception as e:
verbose_proxy_logger.error(f"Error reading public key: {str(e)}")
def _verify(self, license_str: str) -> bool:
verbose_proxy_logger.debug(
"litellm.proxy.auth.litellm_license.py::_verify - Checking license against {}/verify_license - {}".format(
self.base_url, license_str
)
)
url = "{}/verify_license/{}".format(self.base_url, license_str)
response: Optional[httpx.Response] = None
try: # don't impact user, if call fails
num_retries = 3
for i in range(num_retries):
try:
response = self.http_handler.get(url=url)
if response is None:
raise Exception("No response from license server")
response.raise_for_status()
except httpx.HTTPStatusError:
if i == num_retries - 1:
raise
if response is None:
raise Exception("No response from license server")
response_json = response.json()
premium = response_json["verify"]
assert isinstance(premium, bool)
verbose_proxy_logger.debug(
"litellm.proxy.auth.litellm_license.py::_verify - License={} is premium={}".format(
license_str, premium
)
)
return premium
except Exception as e:
verbose_proxy_logger.exception(
"litellm.proxy.auth.litellm_license.py::_verify - Unable to verify License={} via api. - {}".format(
license_str, str(e)
)
)
return False
def is_premium(self) -> bool:
"""
1. verify_license_without_api_request: checks if license was generate using private / public key pair
2. _verify: checks if license is valid calling litellm API. This is the old way we were generating/validating license
"""
try:
verbose_proxy_logger.debug(
"litellm.proxy.auth.litellm_license.py::is_premium() - ENTERING 'IS_PREMIUM' - LiteLLM License={}".format(
self.license_str
)
)
if self.license_str is None:
self.license_str = os.getenv("LITELLM_LICENSE", None)
verbose_proxy_logger.debug(
"litellm.proxy.auth.litellm_license.py::is_premium() - Updated 'self.license_str' - {}".format(
self.license_str
)
)
if self.license_str is None:
return False
elif (
self.verify_license_without_api_request(
public_key=self.public_key, license_key=self.license_str
)
is True
):
return True
elif self._verify(license_str=self.license_str) is True:
return True
return False
except Exception:
return False
def verify_license_without_api_request(self, public_key, license_key):
try:
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.asymmetric import padding
# Decode the license key
decoded = base64.b64decode(license_key)
message, signature = decoded.split(b".", 1)
# Verify the signature
public_key.verify(
signature,
message,
padding.PSS(
mgf=padding.MGF1(hashes.SHA256()),
salt_length=padding.PSS.MAX_LENGTH,
),
hashes.SHA256(),
)
# Decode and parse the data
license_data = json.loads(message.decode())
# debug information provided in license data
verbose_proxy_logger.debug("License data: %s", license_data)
# Check expiration date
expiration_date = datetime.strptime(
license_data["expiration_date"], "%Y-%m-%d"
)
if expiration_date < datetime.now():
return False, "License has expired"
return True
except Exception as e:
verbose_proxy_logger.debug(
"litellm.proxy.auth.litellm_license.py::verify_license_without_api_request - Unable to verify License locally. - {}".format(
str(e)
)
)
return False
|