Writes a signed update into one block, for a transport that moves blocks.
The block is the signed manifest and the image behind a header that says where each
begins. Nothing in the header is trusted: every rule that decides whether the image runs
is still the manifest's.
Writes a signed update into one block, for a transport that moves blocks.
The block is the signed manifest and the image behind a header that says where each begins. Nothing in the header is trusted: every rule that decides whether the image runs is still the manifest's.