The new interface to the VM instance secrets already provides a
context-specific secret so it can be used directly as the seed for the
key without requiring another derivation.
Bug: 243514248
Test: atest ComposHostTestCases
Test: atest compos_key_tests
Change-Id: Ibbff27cc6e4e8f499bf70ff6ce171f6cd7765288
Extend compos_helper to support signing, use it from CompOS.
Expose the public key from the VM. Rename compos_verify_key to
compos_verify and get it to verify the signature against the current
instance's public key.
Also move DICE access to compos_key_main. There's no use having it in
the library - neither the tests nor compos_verify can use it - and it
complicates the build rules.
There's a lot more that can be deleted, but I'll do that in a
follow-up; this is big enough already.
Bug: 218494522
Test: atest CompOsSigningHostTest CompOsDenialHostTest
Change-Id: I2d71f68a595d5ddadb2e7b16937fa6855f5db0ab
Create a small library to do key-related operations (derive, sign,
verify). Add tests.
Create a small standlone executable to expose these functions.
Bug: 218494522
Test: atest compos_key_tests
Change-Id: I5c984178b822510fd32784d01cf4322e592e5d2a
Andrew Scull
Alan Stokes