CLI for Chameleon Ultra.
c7n is a contraction of "chameleon", a play on k8s for Kubernetes.
# Get basic info on a tag.
$ c7n info
{ uid: 'deadbeef', sak: '08', atqa: '0400' }
# Read a block
$ c7n read 2 A ffffffffffff
00000000000000000000000000000000
# Write a block
$ c7n write 2 A ffffffffffff aaaaaabbbbbbccccccddddddeeeeeeff
# Test an auth key
$ c7n test-key 2 A 000000000000