Tag signing doesn't include ACL bits

[scourge411]

It appears that the tag signature doesn't take the ACL bits of the sector trailer into account.

So you can change the normal BBL tag ACL 878787

read AB
read AB
read AB
read ACCESS by AB; write ACCESS by B

to FF0780, the transport ACL:

read AB; write AB; increment AB; decrement transfer restore AB
read AB; write AB; increment AB; decrement transfer restore AB
read AB; write AB; increment AB; decrement transfer restore AB
write A by A; read ACCESS by A write ACCESS by A; read B by A; write B by A

and the tag will still work in the AMS.

This is useful because it you're an idiot and miswrite the tag using the 878787 ACL, it's a pain to fix as you have to re-write the sector trailer to change the ACL before you can change the data blocks.

And if you screw up the ACL, you brick the tag.