cryptodev: Permit CIOCCRYPT for AEAD ciphers.

[jhb]

Summary

A request without AAD for an AEAD cipher can be submitted via
CIOCCRYPT rather than CIOCCRYPTAEAD.

Sponsored by: The FreeBSD Foundation

[jhb]

This was triggered by cryptotest.py since it uses CIOCCRYPT for requests without AAD and some of the AES-CCM tests use empty AAD.

[markj]

crp_sanity() asserts that for AEAD requests the IV must be in a separate buffer, i.e., CRYPTO_F_IV_SEPARATE is set. cryptodev_aead() ensures this, but cryptodev_op() does not.

[jhb]

Mmm, true. I will add a test that rejects AEAD requests without a separate IV.

[jhb]

• Reject AEAD requests without an explicit IV.