The strongswan vpn suite uses the native ipsec stack in the standard linux kernel. it supports both the ikev1 and ikev2 protocols.

this package provides some common plugins for the strongswan utility and cryptograhic library.

included plugins are:
- agent (rsa/ecdsa private key backend connecting to ssh-agent)
- gcm (gcm cipher mode wrapper)
- openssl (crypto backend based on openssl, provides
rsa/ecdsa/dh/ecdh/ciphers/hashers/hmac/x.509/crl/rng)