-.\" $OpenBSD: ssh-keygen.1,v 1.154 2019/01/22 11:19:42 djm Exp $
+.\" $OpenBSD: ssh-keygen.1,v 1.155 2019/01/22 11:40:42 djm Exp $
.\"
.\" Author: Tatu Ylonen <ylo@cs.hut.fi>
.\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
.Op Fl N Ar new_passphrase
.Op Fl C Ar comment
.Op Fl f Ar output_keyfile
+.Op Fl m Ar format
.Nm ssh-keygen
.Fl p
.Op Fl P Ar old_passphrase
.Op Fl N Ar new_passphrase
.Op Fl f Ar keyfile
+.Op Fl m Ar format
.Nm ssh-keygen
.Fl i
.Op Fl m Ar key_format
Specify the amount of memory to use (in megabytes) when generating
candidate moduli for DH-GEX.
.It Fl m Ar key_format
-Specify a key format for the
+Specify a key format for key generation, the
.Fl i
-(import) or
+(import),
.Fl e
-(export) conversion options.
+(export) conversion options, and the
+.Fl p
+change passphrase operation.
+The latter may be used to convert between OpenSSH private key and PEM
+private key formats.
The supported key formats are:
.Dq RFC4716
(RFC 4716/SSH2 public or private key),