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56
test.py
56
test.py
@ -1,26 +1,38 @@
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import nfc
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from fido2.pcsc import CtapPcscDevice
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import time
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from fido2.utils import sha256
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from fido2.ctap1 import Ctap1
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import sys
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def connected(tag):
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print("Tag detected:", tag)
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return True
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def read_nfc():
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dev = next(CtapPcscDevice.list_devices(), None)
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try:
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if not dev:
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clf = nfc.ContactlessFrontend('usb') # Ensure this matches your connection
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print("No NFC u2f device found")
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print("NFC reader initialized.")
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sys.exit(1)
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except Exception as e:
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print("Failed to initialize NFC reader:", e)
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return
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try:
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chal = sha256(b"AAA")
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while True:
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appid = sha256(b"BBB")
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print("Waiting for NFC tag...")
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clf.connect(rdwr={'on-connect': connected})
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time.sleep(1)
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except Exception as e:
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print("Error reading NFC tag:", e)
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finally:
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clf.close()
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read_nfc()
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ctap1 = Ctap1(dev)
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print("version:", ctap1.get_version())
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# True - make extended APDU and send it to key
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# ISO 7816-3:2006. page 33, 12.1.3 Decoding conventions for command APDUs
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# ISO 7816-3:2006. page 34, 12.2 Command-response pair transmission by T=0
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# False - make group of short (less than 255 bytes length) APDU
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# and send them to key. ISO 7816-3:2005, page 9, 5.1.1.1 Command chaining
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dev.use_ext_apdu = False
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reg = ctap1.register(chal, appid)
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print("register:", reg)
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reg.verify(appid, chal)
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print("Register message verify OK")
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auth = ctap1.authenticate(chal, appid, reg.key_handle)
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print("authenticate result: ", auth)
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res = auth.verify(appid, chal, reg.public_key)
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print("Authenticate message verify OK")
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