def reset_piv(self):
'''Resets YubiKey PIV app and generates new key for GAM to use.'''
reply = str(
input(
'This will wipe all PIV keys and configuration from your YubiKey. Are you sure? (y/N) '
).lower().strip())
if reply != 'y':
sys.exit(1)
try:
conn = self._connect()
with conn:
piv = PivSession(conn)
piv.reset()
rnd = SystemRandom()
pin_puk_chars = string.ascii_letters + string.digits + string.punctuation
new_puk = ''.join(rnd.choice(pin_puk_chars) for _ in range(8))
new_pin = ''.join(rnd.choice(pin_puk_chars) for _ in range(8))
piv.change_puk('12345678', new_puk)
piv.change_pin('123456', new_pin)
print(f'PIN set to: {new_pin}')
piv.authenticate(MANAGEMENT_KEY_TYPE.TDES,
DEFAULT_MANAGEMENT_KEY)
piv.verify_pin(new_pin)
print('YubiKey is generating a non-exportable private key...')
pubkey = piv.generate_key(SLOT.AUTHENTICATION,
KEY_TYPE.RSA2048, PIN_POLICY.ALWAYS,
TOUCH_POLICY.NEVER)
now = datetime.datetime.utcnow()
valid_to = now + datetime.timedelta(days=36500)
subject = 'CN=GAM Created Key'
piv.authenticate(MANAGEMENT_KEY_TYPE.TDES,
DEFAULT_MANAGEMENT_KEY)
piv.verify_pin(new_pin)
cert = generate_self_signed_certificate(
piv, SLOT.AUTHENTICATION, pubkey, subject, now, valid_to)
piv.put_certificate(SLOT.AUTHENTICATION, cert)
piv.put_object(OBJECT_ID.CHUID, generate_chuid())
except ValueError as err:
controlflow.system_error_exit(8, f'YubiKey - {err}')
def piv_generate_certificate(
self, slot_name, algorithm, subject, expiration_date,
self_sign=True, csr_file_url=None, pin=None, mgm_key_hex=None):
logger.debug('slot_name=%s algorithm=%s common_name=%s '
'expiration_date=%s self_sign=%s csr_file_url=%s',
slot_name, algorithm, subject, expiration_date,
self_sign, csr_file_url)
if csr_file_url:
file_path = self._get_file_path(csr_file_url)
with self._open_device([SmartCardConnection]) as conn:
session = PivSession(conn)
with PromptTimeout():
auth_failed = self._piv_ensure_authenticated(
session, pin=pin, mgm_key_hex=mgm_key_hex)
if auth_failed:
return auth_failed
pin_failed = self._piv_verify_pin(session, pin)
if pin_failed:
return pin_failed
if self_sign:
now = datetime.datetime.utcnow()
try:
year = int(expiration_date[0:4])
month = int(expiration_date[(4+1):(4+1+2)])
day = int(expiration_date[(4+1+2+1):(4+1+2+1+2)])
valid_to = datetime.datetime(year, month, day)
except ValueError as e:
logger.debug(
'Failed to parse date: ' + expiration_date,
exc_info=e)
return failure(
'invalid_iso8601_date',
{'date': expiration_date})
try:
public_key = session.generate_key(
SLOT[slot_name], KEY_TYPE[algorithm])
except ApduError as e:
if e.sw == SW.SECURITY_CONDITION_NOT_SATISFIED:
logger.debug("Wrong management key", exc_info=e)
return failure('wrong_mgm_key')
pin_failed = self._piv_verify_pin(session, pin)
if pin_failed:
return pin_failed
if "=" not in subject:
# Old style, common name only.
subject = "CN=" + subject
try:
if self_sign:
cert = generate_self_signed_certificate(session,
SLOT[slot_name], public_key, subject, now,
valid_to)
session.put_certificate(SLOT[slot_name], cert)
session.put_object(OBJECT_ID.CHUID, generate_chuid())
else:
csr = generate_csr(session,
SLOT[slot_name], public_key, subject)
with open(file_path, 'w+b') as csr_file:
csr_file.write(csr.public_bytes(
encoding=serialization.Encoding.PEM))
except ApduError as e:
if e.sw == SW.SECURITY_CONDITION_NOT_SATISFIED:
return failure('pin_required')
raise
return success()