kgt 0.3.3

Python tools for Keygen.sh licensing

kgt

Some handy tools for the Keygen licensing service. (This is a user contribution, not an official Keygen LLC product. For Keygen software, see here.)

Install with

pip install kgt

and use as

import sys
from kgt import validate_license_key_online, ValidationError

try:
    out = validate_license_key_online(
        account_id="demo", key="DEMO-DAD877-FCBF82-B83D5A-03E644-V3"
    )
except ValidationError as e:
    print(f"Error: Invalid license ({e.code}). Exiting.")
    sys.exit(1)

The out object contains useful information such as

out.code
out.timestamp
out.license_creation_time
out.license_expiry_time

The validation result can also be safely cached with

import sys
from datetime import datetime, timedelta
from kgt import validate_license_key_cached, ValidationError

try:
    out = validate_license_key_cached(
        account_id="your accound id",
        key="the license key",
        keygen_verify_key="your Ed25519 128-bit Verify Key",
        cache_path="/tmp/license-cache.json",
        refresh_cache_period=timedelta(days=3),
    )
except ValidationError as e:
    print(f"Error: Invalid license ({e.code}). Exiting.")
    sys.exit(1)

now = datetime.utcnow()
cache_age = now - out.timestamp
if cache_age > timedelta(days=3) and cache_age < timedelta(days=7):
    print("Warning: Could not validate license. Make sure to get online soon.")
elif cache_age > timedelta(days=7):
    print("Error: Could not validate license. Internet connection needed. Exiting.")
    sys.exit(1)

For offline validation, use

from kgt import validate_offline_key

# or "RSA_2048_PKCS1_SIGN_V2", "RSA_2048_PKCS1_PSS_SIGN_V2":
license_scheme = "ED25519_SIGN"
keygen_verify_key = "your public verify key"
license_key = "your offline license key"

try:
    data = validate_offline_key(license_scheme, license_key, keygen_verify_key)
except ValidationError as e:
    print(f"Error: Invalid license ({e.code}). Exiting.")
    sys.exit(1)

print(data)