crypto: lib - implement library version of AES in CFB mode

Implement AES in CFB mode using the existing, mostly constant-time
generic AES library implementation. This will be used by the TPM code
to encrypt communications with TPM hardware, which is often a discrete
component connected using sniffable wires or traces.

While a CFB template does exist, using a skcipher is a major pain for
non-performance critical synchronous crypto where the algorithm is known
at compile time and the data is in contiguous buffers with valid kernel
virtual addresses.

Tested-by: James Bottomley <[email protected]>
Reviewed-by: James Bottomley <[email protected]>
Reviewed-by: Jarkko Sakkinen <[email protected]>
Link: https://lore.kernel.org/all/[email protected]/
Signed-off-by: Ard Biesheuvel <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
Tested-by: Jarkko Sakkinen <[email protected]>
Signed-off-by: Jarkko Sakkinen <[email protected]>

0 files changed, 0 insertions, 0 deletions