Update examples.

examples/hmac_secret.py

@@ -33,7 +33,6 @@ derive two separate secrets.
 from fido2.hid import CtapHidDevice
 from fido2.client import Fido2Client, UserInteraction
 from getpass import getpass
-from binascii import b2a_hex
 import sys
 import os
 
@@ -103,7 +102,7 @@ allow_list = [{"type": "public-key", "id": credential.credential_id}]
 
 # Generate a salt for HmacSecret:
 salt = os.urandom(32)
-print("Authenticate with salt:", b2a_hex(salt))
+print("Authenticate with salt:", salt.hex())
 
 # Authenticate the credential
 result = client.get_assertion(
@@ -118,13 +117,13 @@ result = client.get_assertion(
 )  # Only one cred in allowList, only one response.
 
 output1 = result.extension_results["hmacGetSecret"]["output1"]
-print("Authenticated, secret:", b2a_hex(output1))
+print("Authenticated, secret:", output1.hex())
 
 # Authenticate again, using two salts to generate two secrets:
 
 # Generate a second salt for HmacSecret:
 salt2 = os.urandom(32)
-print("Authenticate with second salt:", b2a_hex(salt2))
+print("Authenticate with second salt:", salt2.hex())
 
 # The first salt is reused, which should result in the same secret.
 result = client.get_assertion(
@@ -139,5 +138,5 @@ result = client.get_assertion(
 )  # One cred in allowCredentials, single response.
 
 output = result.extension_results["hmacGetSecret"]
-print("Old secret:", b2a_hex(output["output1"]))
-print("New secret:", b2a_hex(output["output2"]))
+print("Old secret:", output["output1"].hex())
+print("New secret:", output["output2"].hex())

examples/resident_key.py

@@ -95,7 +95,7 @@ user = {"id": b"user_id", "name": "A. User"}
 # Prepare parameters for makeCredential
 create_options, state = server.register_begin(
     user,
-    resident_key=True,
+    resident_key_requirement="required",
     user_verification=uv,
     authenticator_attachment="cross-platform",
 )

examples/verify_attestation.py

@@ -39,7 +39,6 @@ from fido2.client import Fido2Client, WindowsClient, UserInteraction
 from fido2.server import Fido2Server, AttestationVerifier
 from base64 import b64decode
 from getpass import getpass
-from binascii import b2a_hex
 import sys
 import ctypes
 
@@ -153,4 +152,4 @@ auth_data = server.register_complete(
 credentials = [auth_data.credential_data]
 
 print("New credential created, attestation verified!")
-print("Yubico device AAGUID:", b2a_hex(auth_data.credential_data.aaguid))
+print("Yubico device AAGUID:", auth_data.credential_data.aaguid.hex())