attestation: Implemented a Sign operation.
Keys that were created with KEY_USAGE_SIGN usage can be used to sign
arbitrary data with the RSA-PKCS1v15-SHA256 mechanism.
TEST=unit, manual using 'attestation_client sign' and
Reviewed-by: Alex Vakulenko <email@example.com>
Commit-Queue: Darren Krahn <firstname.lastname@example.org>
Tested-by: Darren Krahn <email@example.com>
24 files changed