Use TPM2_Quote for attestation
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Description
**Is your feature request related to a problem? Please describe.**
TOTP requires synchronizing time, and HOTP requires synchronizing state.
**Describe the solution you'd like**
Use [TPM2_Quote] for attestation. TPM2_Quote signs a set of PCRs and a nonce with a key in the TPM. It is possible to have a key that can only be used for TPM2_Quote and cannot be exported from the TPM.
**Describe alternatives you've considered**
None.
**Additional context**
This is more secure than TOTP or HOTP for two reasons:
1. The secret used to sign the quote never leaves the TPM, making it much less likely to be accidentally leaked.
2. The qualifying data can be much longer than a 6 digit passcode.
[TPM2_Quote]: https://tpm2-tools.readthedocs.io/en/latest/man/tpm2_quote.1
Contributor guide
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 with the linked TPM2_Quote documentation. The issue names no file, entry point, or test, so locate the project's attestation flow and determine how quote verification should be validated; done requires an agreed implementation and test plan for TPM-backed attestation.
Written by the indexing model from the issue text.
Assessment
- Domain
- authentication, security
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100