-.\" $OpenBSD: ipsec.conf.5,v 1.161 2021/11/04 03:53:57 yasuoka Exp $
+.\" $OpenBSD: ipsec.conf.5,v 1.162 2021/11/04 04:20:14 yasuoka Exp $
.\"
.\" Copyright (c) 2004 Mathieu Sauve-Frankel All rights reserved.
.\"
.Bq IKE only
can only be used with the
.Ic ike
-keyword, transforms with
+keyword; transforms with
.Bq phase 2 only
can only be used with the
.Ic quick
However as well as the key, a 32-bit nonce has to be supplied.
Thus 160, 224, or 288 bits of key material, respectively, have to be supplied.
The same applies to AES-GCM, AES-GMAC and Chacha20-Poly1305,
-however in the latter case the keysize is 256 bit.
+however in the latter case the keysize is 256 bits.
.Pp
Using AES-GMAC or NULL with ESP will only provide authentication.
This is useful in setups where AH cannot be used, e.g. when NAT is involved.