Add support for EAT claims required by TEEP

[dthaler]

From https://datatracker.ietf.org/doc/html/draft-ietf-teep-protocol#section-4.3.1 :

   +------------+---------------------+--------------------------------+
   | Requiremen | Claim               | Reference                      |
   | t          |                     |                                |
   +------------+---------------------+--------------------------------+
   | Device     | device-identifier   | [I-D.birkholz-rats-suit-claims |
   | unique     |                     | ] section 3.1.3                |
   | identifier |                     |                                |
   | Vendor of  | vendor-identifier   | [I-D.birkholz-rats-suit-claims |
   | the device |                     | ] section 3.1.1                |
   | Class of   | class-identifier    | [I-D.birkholz-rats-suit-claims |
   | the device |                     | ] section 3.1.2                |
   | TEE        | chip-version-scheme | [I-D.ietf-rats-eat] section    |
   | hardware   |                     | 3.7                            |
   | type       |                     |                                |
   | TEE        | chip-version-scheme | [I-D.ietf-rats-eat] section    |
   | hardware   |                     | 3.7                            |
   | version    |                     |                                |
   | TEE        | component-          | [I-D.birkholz-rats-suit-claims |
   | firmware   | identifier          | ] section 3.1.4                |
   | type       |                     |                                |
   | TEE        | version             | [I-D.birkholz-rats-suit-claims |
   | firmware   |                     | ] section 3.1.8                |
   | version    |                     |                                |
   | Freshness  | nonce               | [I-D.ietf-rats-eat] section    |
   | proof      |                     | 3.3                            |
   +------------+---------------------+--------------------------------+

Currently only nonce is listed as supported in the ctoken readme file.

[laurencelundblade]

Hi Dave,

Chip version is supported now. It is listed in the readme as HW version (which covers device, board and chip versions).

The UUID ones are super easy to implement, but I'm going to wait until our meeting in a week before implementing them.

Similarly, I'll wait for the TEE version. It seems like the version of an attester should be a generic EAT claim, not a SUIT-specific claim.