- From: Adam Langley via GitHub <sysbot+gh@w3.org>
- Date: Fri, 25 Sep 2020 19:28:23 +0000
- To: public-webauthn@w3.org
(@CrazyChris75 this issue is closed so people might not see your updates.)
This line gives me pause:
> byte[] clientDataJSON = Base64UrlUtil.decode(json.getAsString("response.clientDataJSON"));
`clientDataJSON` is an ArrayBuffer that contains the JSON [directly](https://w3c.github.io/webauthn/#iface-authenticatorresponse), i.e. not base64url encoded. Are you encoding the Javascript object yourself? Are you sure that the encoder is using base64url, not base64?
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