K 10
svn:author
V 2
mw
K 8
svn:date
V 27
2020-10-16T11:25:45.364856Z
K 7
svn:log
V 991
Add support for IPsec ESN and pass relevant information to crypto layer

Implement support for including IPsec ESN (Extended Sequence Number) to
both encrypt and authenticate mode (eg. AES-CBC and SHA256) and combined
mode (eg. AES-GCM). Both ESP and AH protocols are updated. Additionally
pass relevant information about ESN to crypto layer.

For the ETA mode the ESN is stored in separate crp_esn buffer because
the high-order 32 bits of the sequence number are appended after the
Next Header (RFC 4303).

For the AEAD modes the high-order 32 bits of the sequence number
[e.g.  RFC 4106, Chapter 5 AAD Construction] are included as part of
crp_aad (SPI + ESN (32 high order bits) + Seq nr (32 low order bits)).

Submitted by:           Grzegorz Jaszczyk <jaz@semihalf.com>
                        Patryk Duda <pdk@semihalf.com>
Reviewed by:            jhb, gnn
Differential revision:  https://reviews.freebsd.org/D22369
Obtained from:          Semihalf
Sponsored by:           Stormshield

END