Key block:
  Size:                2232
  Flags:               7 (ignored)
  Data key algorithm:  7 RSA4096 SHA256
  Data key version:    1
  Data key sha1sum:    e2c1c92d7d7aa7dfed5e8375edd30b7ae52b7450
Preamble:
  Size:                  2164
  Header version:        2.1
  Firmware version:      12
  Kernel key algorithm:  7 RSA4096 SHA256
  Kernel key version:    1
  Kernel key sha1sum:    5d2b220899c4403d564092ada3f12d3cc4483223
  Firmware body size:    16384
  Preamble flags:        42
Body verification succeeded.