Add validation for a complete BCC

We may have a complete Bcc chain encoded in a single CBOR value -
e.g. from IDiceNode::getAttestationChain. Add support for parsing and
validating these.

Enhance the command-line argument handling of the bcc_validator tool
to support both individual certs and a complete chain.

Add some more tests.

Bug: 225177477
Test: atest libcert_request_validator_tests
Test: Manual testing of argument handling
Change-Id: Ic190743334780734d49cf4e0610ed7c1f9350ba4
7 files changed
tree: 7e6c7a06e5e100face3837b4de0d965bb1699692
  1. fuzzing/
  2. gdb/
  3. remote_provisioning/
  4. sanitizer-status/
  5. CleanSpec.mk
  6. OWNERS