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import argparse
import base64
import json
from pathlib import Path
from cryptography.hazmat.primitives import hashes, serialization
from cryptography.hazmat.primitives.asymmetric import padding
from PIL import Image
from pyzbar import pyzbar
def cert(name):
return Path(__file__).absolute().parent / "certs" / name
def verify(qr_code_bytes):
b64, payload = qr_code_bytes.split(b"#", maxsplit=1)
sig = base64.decodebytes(b64)
h = hashes.Hash(hashes.SHA256())
h.update(payload.decode().encode("utf8"))
digest = h.finalize()
with open(cert("RamzorQRPubKey.pem"), "rb") as f:
k = serialization.load_pem_public_key(f.read())
k.verify(
sig,
digest,
padding.PKCS1v15(),
hashes.SHA256(),
)
print("Valid signature!")
data = json.loads(payload)
if data["ct"] == 1:
for i in range(len(data["p"])):
print(f"Details of person number {i+1}:")
print(f"\tIsraeli ID Number {data['p'][i]['idl']}")
print(f"\tID valid by {data['p'][i]['e']}")
print(f"Cert Unique ID {data['id']}")
elif data["ct"] == 2:
print(f"Israeli ID Number {data['idl']}")
print(f"ID valid by {data['e']}")
print(f"Cert Unique ID {data['id']}")
else:
print("Unsupported certificate type")
def read_qr_code(image_path):
return pyzbar.decode(Image.open(image_path))[0].data
def create_arg_parser():
parser = argparse.ArgumentParser("Green Pass QR code verifier")
group = parser.add_mutually_exclusive_group(required=True)
group.add_argument(
"-i",
"--image-path",
type=Path,
help="Path to an image with the QR code",
default=None,
)
group.add_argument(
"-t",
"--txt-path",
type=Path,
help="Path to decoded QR code textual content",
default=None,
)
return parser
if __name__ == "__main__":
parser = create_arg_parser()
args = parser.parse_args()
if args.image_path:
verify(read_qr_code(args.image_path))
elif args.txt_path:
with open(args.txt_path, "rb") as f:
verify(f.read().strip())
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