Custom dumps / msgpack

[Tronic]

I cannot find any option to change the dumps function. It would be much easier to use msgpack so that bytes/arraybuffer are automatically preserved, in contrast to json which needs base64 handling for binary fields. The .dict() accessor doesn't work for this because field names are in snake case then.

[MasterKale]

Hmm, to understand your use case better, can you confirm you're aiming for a camelCase'd representation of PublicKeyCredentialRequestOptions (for example) but with the various bytes values as bytes instead of encoded as base64url?

[MasterKale]

What about something like this?

from webauthn import generate_authentication_options

auth_options = generate_authentication_options(rp_id="example.com")
print(auth_options.dict(by_alias=True))

# {
#   'challenge': b'x\x16\x07\x8a\x83M\xbeI\xe8K\xc8\x90F\xe1qgn\xa3\x96\x8dg\xc3(\xd0y\x1c\xac\x9a._\xdbQ\xf7\xd4rZu\xfa$:\xbb\xd1\xa2\xa5!\xcb\x84X#P\x80\x1by\xa4 \xb3\x96!\xe85`0&\x90',
#   'timeout': 60000,
#   'rpId': 'example.com',
#   'allowCredentials': [],
#   'userVerification': <UserVerificationRequirement.PREFERRED: 'preferred'>
# }

[Tronic]

Seems to be working beautifully, this eliminated a lot of boilerplate code :)

ws.send(msgpack.packb(auth_options.dict(by_alias=True))

Python server to browser JS

const auth_options = MessagePack.decode(await ws.arecv())
const credentials = await navigator.credentials.create({publicKey: auth_options})

Just Works™️