Passkey PRF support e.g. for confer.to
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- Dominant language
- Java
- Stars
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- Forks
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- Avg merge
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- Merged PRs (30d)
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Description
Describe the bug
I am using a Yubikey 5C and am unable to create an account using PRF aka Encryption Keys with the microg authenticator. As this should work with my key, I think this may be an issue with microg. You can test it here for example: https://webauthn.karkkainen.net/ or over at https://confer.to/
To Reproduce
Steps to reproduce the behavior:
- Go to one of fhe sites mentioned and try to create an account and login.
- Fails with PRF not supported or encryption keys not supported
Expected behavior
Being able to create and use the passkey from a yubikey 5C
Screenshots
System
Android Version: 15
Custom ROM: lineageOS 22.2 (22.2-20251205-microG-FP3)
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the failure on Android 15 with the Yubikey 5C at the webauthn.karkkainen.net or confer.to test sites, then trace GmsCore's passkey handling for PRF or encryption-key support. No source file or test is named; done means passkey creation and login work without the reported unsupported errors.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- android, java
- Domain
- authentication, mobile, security
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100