Key derivation for session encryption and MACing now involves mixing
in SessionTranscriptBytes. Update docs, default implementation, and
VTS tests to reflect this.
Also, the standard changed such that instead of DeviceAuthentication
being MACed or signed, it's instead DeviceAuthenticationBytes which is
defined as #6.24(bstr .cbor DeviceAuthentication). The same also for
ReaderAuthentication, now ReaderAuthenticationBytes is the CBOR which
is signed by the reader.
Also update the URL for CDDL since it's now a published RFC.
Bug: 159482543
Test: atest VtsHalIdentityTargetTest
Test: atest android.security.identity.cts
Change-Id: I73fc7eb48ffb71e00a8b54849266ed814295fa39
These updates are based on input/experiences implementing this
HAL. There are no API changes.
- Specify that the validity for credentialKey certificate shall be
from current time and expire at the same time as the attestation
batch certificate.
- Require challenge passed to getAttestationCertificate() is
non-empty.
- Fix bug in VTS tests where the startPersonlization() result was not
checked.
- Remove verifyStartPersonalizationZero test since it cannot be
completed.
- Ensure secureUserId is non-zero if user authentication is needed.
- Specify format for signingKeyBlob in generateSigningKeyPair() same
way we do for credentialData in finishAddingEntries().
- Modify EndToEndTest to decrypt/unpack credentialData to obtain
credentialPrivKey and storageKey and do cross-checks on these.
- Modify EndToEndTest to decrypt/unpack signingKeyBlob to obtain
signingKeyPriv and check it matches the public key in the returned
certificate.
- Add new VTS tests for user and reader authentication.
- Relax unnecessary requirements about SessionTranscript structure -
just require it has X and Y of the ephemeral key created earlier.
- Allow calls in VTS tests to v2 HAL to fail - this should allow
these VTS tests to pass on a compliant v1 HAL.
Bug: 156911917
Bug: 158107945
Test: atest VtsHalIdentityTargetTest
Test: atest android.security.identity.cts
Change-Id: I11b79dbd57b1830609c70301fea9c99f9e5080cb
