crypto: caam - add in-kernel interface for blob generator

The NXP Cryptographic Acceleration and Assurance Module (CAAM)
can be used to protect user-defined data across system reboot:

  - When the system is fused and boots into secure state, the master
    key is a unique never-disclosed device-specific key
  - random key is encrypted by key derived from master key
  - data is encrypted using the random key
  - encrypted data and its encrypted random key are stored alongside
  - This blob can now be safely stored in non-volatile memory

On next power-on:
  - blob is loaded into CAAM
  - CAAM writes decrypted data either into memory or key register

Add functions to realize encrypting and decrypting into memory alongside
the CAAM driver.

They will be used in a later commit as a source for the trusted key
seal/unseal mechanism.

Reviewed-by: David Gstir <[email protected]>
Reviewed-by: Pankaj Gupta <[email protected]>
Tested-by: Tim Harvey <[email protected]>
Tested-by: Matthias Schiffer <[email protected]>
Tested-by: Pankaj Gupta <[email protected]>
Tested-by: Michael Walle <[email protected]> # on ls1028a (non-E and E)
Tested-by: John Ernberg <[email protected]> # iMX8QXP
Signed-off-by: Steffen Trumtrar <[email protected]>
Signed-off-by: Ahmad Fatoum <[email protected]>
Signed-off-by: Jarkko Sakkinen <[email protected]>

0 files changed, 0 insertions, 0 deletions