One last change for #28818.
Do we need these `TPM2_ContextSave` command calls?
This PR is working for me. Double checking with @getvictor in case he
thinks there's a need for these commands.
#31047
We were storing public key bytes and encrypted private key bytes as raw
files called `tpm_cms_pub.blob` and `tpm_cms_priv.blob` respectively.
This PR changes to use a better format on a single file that looks like
this:
```
"-----BEGIN TSS2 PRIVATE KEY-----"
[...]
"-----END TSS2 PRIVATE KEY-----"
```
(We haven't released this feature yet so we don't need a migration.)
#30461
This PR contains the changes for the happy path.
On a separate PR we will be adding tests and further fixes for edge
cases.
- [X] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/guides/committing-changes.md#changes-files)
for more information.
- [ ] Added/updated automated tests
- [x] Manual QA for all new/changed functionality
- For Orbit and Fleet Desktop changes:
- [ ] Make sure fleetd is compatible with the latest released version of
Fleet (see [Must
rule](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/workflows/fleetd-development-and-release-strategy.md)).
- [ ] Orbit runs on macOS, Linux and Windows. Check if the orbit
feature/bugfix should only apply to one platform (`runtime.GOOS`).
- [ ] Manual QA must be performed in the three main OSs, macOS, Windows
and Linux.
- [ ] Auto-update manual QA, from released version of component to new
version (see [tools/tuf/test](../tools/tuf/test/README.md)).
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added support for using a TPM-backed key and SCEP-issued certificate
to sign HTTP requests, enhancing security through hardware-based key
management.
* Introduced new CLI and environment flags to enable TPM-backed client
certificates for Linux packages and Orbit.
* Added a local HTTPS proxy that automatically signs requests using the
TPM-backed key.
* **Bug Fixes**
* Improved cleanup and restart behavior when authentication fails with a
host identity certificate.
* **Tests**
* Added comprehensive tests for SCEP client functionality and TPM
integration.
* **Chores**
* Updated scripts and documentation to support TPM-backed client
certificate packaging and configuration.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
