upstream: Fill in missing man page bits for U2F security key support:

Mention the new key types, the ~/.ssh/id_ecdsa_sk file, ssh's
SecurityKeyProvider keyword, the SSH_SK_PROVIDER environment variable,
and ssh-keygen's new -w and -x options.

Copy the ssh-sk-helper man page from ssh-pkcs11-helper with minimal
substitutions.

ok djm@

OpenBSD-Commit-ID: ef2e8f83d0c0ce11ad9b8c28945747e5ca337ac4

Makefile.in

@@ -124,8 +124,8 @@ SSHDOBJS=sshd.o auth-rhosts.o auth-passwd.o \
 	sandbox-seccomp-filter.o sandbox-capsicum.o sandbox-pledge.o \
 	sandbox-solaris.o uidswap.o
 
-MANPAGES	= moduli.5.out scp.1.out ssh-add.1.out ssh-agent.1.out ssh-keygen.1.out ssh-keyscan.1.out ssh.1.out sshd.8.out sftp-server.8.out sftp.1.out ssh-keysign.8.out ssh-pkcs11-helper.8.out sshd_config.5.out ssh_config.5.out
+MANPAGES	= moduli.5.out scp.1.out ssh-add.1.out ssh-agent.1.out ssh-keygen.1.out ssh-keyscan.1.out ssh.1.out sshd.8.out sftp-server.8.out sftp.1.out ssh-keysign.8.out ssh-pkcs11-helper.8.out ssh-sk-helper.8.out sshd_config.5.out ssh_config.5.out
-MANPAGES_IN	= moduli.5 scp.1 ssh-add.1 ssh-agent.1 ssh-keygen.1 ssh-keyscan.1 ssh.1 sshd.8 sftp-server.8 sftp.1 ssh-keysign.8 ssh-pkcs11-helper.8 sshd_config.5 ssh_config.5
+MANPAGES_IN	= moduli.5 scp.1 ssh-add.1 ssh-agent.1 ssh-keygen.1 ssh-keyscan.1 ssh.1 sshd.8 sftp-server.8 sftp.1 ssh-keysign.8 ssh-pkcs11-helper.8 ssh-sk-helper.8 sshd_config.5 ssh_config.5
 MANTYPE		= @MANTYPE@
 
 CONFIGFILES=sshd_config.out ssh_config.out moduli.out
@@ -372,6 +372,7 @@ install-files:
 	$(INSTALL) -m 644 sftp-server.8.out $(DESTDIR)$(mandir)/$(mansubdir)8/sftp-server.8
 	$(INSTALL) -m 644 ssh-keysign.8.out $(DESTDIR)$(mandir)/$(mansubdir)8/ssh-keysign.8
 	$(INSTALL) -m 644 ssh-pkcs11-helper.8.out $(DESTDIR)$(mandir)/$(mansubdir)8/ssh-pkcs11-helper.8
+	$(INSTALL) -m 644 ssh-sk-helper.8.out $(DESTDIR)$(mandir)/$(mansubdir)8/ssh-sk-helper.8
 
 install-sysconf:
 	$(MKDIR_P) $(DESTDIR)$(sysconfdir)
@@ -444,6 +445,7 @@ uninstall:
 	-rm -f $(DESTDIR)$(mandir)/$(mansubdir)8/sftp-server.8
 	-rm -f $(DESTDIR)$(mandir)/$(mansubdir)8/ssh-keysign.8
 	-rm -f $(DESTDIR)$(mandir)/$(mansubdir)8/ssh-pkcs11-helper.8
+	-rm -f $(DESTDIR)$(mandir)/$(mansubdir)8/ssh-sk-helper.8
 
 regress-prep:
 	$(MKDIR_P) `pwd`/regress/unittests/test_helper

ssh-add.1

@@ -1,4 +1,4 @@
-.\"	$OpenBSD: ssh-add.1,v 1.71 2019/11/01 00:52:35 jmc Exp $
+.\"	$OpenBSD: ssh-add.1,v 1.72 2019/11/07 08:38:38 naddy Exp $
 .\"
 .\" Author: Tatu Ylonen <ylo@cs.hut.fi>
 .\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -35,7 +35,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: November 1 2019 $
+.Dd $Mdocdate: November 7 2019 $
 .Dt SSH-ADD 1
 .Os
 .Sh NAME
@@ -63,6 +63,7 @@ When run without arguments, it adds the files
 .Pa ~/.ssh/id_rsa ,
 .Pa ~/.ssh/id_dsa ,
 .Pa ~/.ssh/id_ecdsa ,
+.Pa ~/.ssh/id_ecdsa_sk ,
 and
 .Pa ~/.ssh/id_ed25519 .
 After loading a private key,
@@ -135,7 +136,7 @@ Be quiet after a successful operation.
 .It Fl S Ar provider
 Specifies a path to a security key provider library that will be used when
 adding any security key-hosted keys, overriding the default of using the
-.Ev "SSH_SK_PROVIDER"
+.Ev SSH_SK_PROVIDER
 environment variable to specify a provider.
 .It Fl s Ar pkcs11
 Add keys provided by the PKCS#11 shared library
@@ -205,6 +206,8 @@ hardware security keys.
 Contains the DSA authentication identity of the user.
 .It Pa ~/.ssh/id_ecdsa
 Contains the ECDSA authentication identity of the user.
+.It Pa ~/.ssh/id_ecdsa_sk
+Contains the security key-hosted ECDSA authentication identity of the user.
 .It Pa ~/.ssh/id_ed25519
 Contains the Ed25519 authentication identity of the user.
 .It Pa ~/.ssh/id_rsa

ssh-keygen.1

@@ -1,4 +1,4 @@
-.\"	$OpenBSD: ssh-keygen.1,v 1.172 2019/10/22 08:50:35 jmc Exp $
+.\"	$OpenBSD: ssh-keygen.1,v 1.173 2019/11/07 08:38:38 naddy Exp $
 .\"
 .\" Author: Tatu Ylonen <ylo@cs.hut.fi>
 .\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -35,7 +35,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: October 22 2019 $
+.Dd $Mdocdate: November 7 2019 $
 .Dt SSH-KEYGEN 1
 .Os
 .Sh NAME
@@ -48,8 +48,10 @@
 .Op Fl C Ar comment
 .Op Fl f Ar output_keyfile
 .Op Fl m Ar format
+.Op Fl t Cm dsa | ecdsa | ecdsa-sk | ed25519 | rsa
 .Op Fl N Ar new_passphrase
-.Op Fl t Cm dsa | ecdsa | ed25519 | rsa
+.Op Fl w Ar provider
+.Op Fl x Ar flags
 .Nm ssh-keygen
 .Fl p
 .Op Fl f Ar keyfile
@@ -188,6 +190,7 @@ with public key authentication runs this once to create the authentication
 key in
 .Pa ~/.ssh/id_dsa ,
 .Pa ~/.ssh/id_ecdsa ,
+.Pa ~/.ssh/id_ecdsa_sk ,
 .Pa ~/.ssh/id_ed25519
 or
 .Pa ~/.ssh/id_rsa .
@@ -248,7 +251,7 @@ should be placed to be activated.
 The options are as follows:
 .Bl -tag -width Ds
 .It Fl A
-For each of the key types (rsa, dsa, ecdsa and ed25519)
+For each of the key types (rsa, dsa, ecdsa, ecdsa-sk and ed25519)
 for which host keys
 do not exist, generate the host keys with the default key file path,
 an empty passphrase, default bits for the key type, and default comment.
@@ -282,7 +285,7 @@ flag determines the key length by selecting from one of three elliptic
 curve sizes: 256, 384 or 521 bits.
 Attempting to use bit lengths other than these three values for ECDSA keys
 will fail.
-Ed25519 keys have a fixed length and the
+ECDSA-SK and Ed25519 keys have a fixed length and the
 .Fl b
 flag will be ignored.
 .It Fl C Ar comment
@@ -583,11 +586,12 @@ section for details.
 Test DH group exchange candidate primes (generated using the
 .Fl G
 option) for safety.
-.It Fl t Cm dsa | ecdsa | ed25519 | rsa
+.It Fl t Cm dsa | ecdsa | ecdsa-sk | ed25519 | rsa
 Specifies the type of key to create.
 The possible values are
 .Dq dsa ,
 .Dq ecdsa ,
+.Dq ecdsa-sk ,
 .Dq ed25519 ,
 or
 .Dq rsa .
@@ -658,6 +662,14 @@ options increase the verbosity.
 The maximum is 3.
 .It Fl W Ar generator
 Specify desired generator when testing candidate moduli for DH-GEX.
+.It Fl w Ar provider
+Specifies a path to a security key provider library that will be used when
+creating any security key-hosted keys, overriding the default of using the
+.Ev SSH_SK_PROVIDER
+environment variable to specify a provider.
+.It Fl x Ar flags
+Specifies the security key flags to use when enrolling a security key-hosted
+key.
 .It Fl y
 This option will read a private
 OpenSSH format file and print an OpenSSH public key to stdout.
@@ -1020,13 +1032,20 @@ user1@example.com,user2@example.com ssh-rsa AAAAX1...
 # A key that is accepted only for file signing.
 user2@example.com namespaces="file" ssh-ed25519 AAA41...
 .Ed
+.Sh ENVIRONMENT
+.Bl -tag -width Ds
+.It Ev SSH_SK_PROVIDER
+Specifies the path to a security key provider library used to interact with
+hardware security keys.
+.El
 .Sh FILES
 .Bl -tag -width Ds -compact
 .It Pa ~/.ssh/id_dsa
 .It Pa ~/.ssh/id_ecdsa
+.It Pa ~/.ssh/id_ecdsa_sk
 .It Pa ~/.ssh/id_ed25519
 .It Pa ~/.ssh/id_rsa
-Contains the DSA, ECDSA, Ed25519 or RSA
+Contains the DSA, ECDSA, security key-hosted ECDSA, Ed25519 or RSA
 authentication identity of the user.
 This file should not be readable by anyone but the user.
 It is possible to
@@ -1040,9 +1059,10 @@ will read this file when a login attempt is made.
 .Pp
 .It Pa ~/.ssh/id_dsa.pub
 .It Pa ~/.ssh/id_ecdsa.pub
+.It Pa ~/.ssh/id_ecdsa_sk.pub
 .It Pa ~/.ssh/id_ed25519.pub
 .It Pa ~/.ssh/id_rsa.pub
-Contains the DSA, ECDSA, Ed25519 or RSA
+Contains the DSA, ECDSA, security key-hosted ECDSA, Ed25519 or RSA
 public key for authentication.
 The contents of this file should be added to
 .Pa ~/.ssh/authorized_keys

ssh-keygen.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh-keygen.c,v 1.359 2019/10/31 21:28:27 djm Exp $ */
+/* $OpenBSD: ssh-keygen.c,v 1.360 2019/11/07 08:38:38 naddy Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -2725,7 +2725,8 @@ usage(void)
 {
 	fprintf(stderr,
 	    "usage: ssh-keygen [-q] [-b bits] [-C comment] [-f output_keyfile] [-m format]\n"
-	    "                  [-N new_passphrase] [-t dsa | ecdsa | ed25519 | rsa]\n"
+	    "                  [-t dsa | ecdsa | ecdsa-sk | ed25519 | rsa]\n"
+	    "                  [-N new_passphrase] [-w provider] [-x flags]\n"
 	    "       ssh-keygen -p [-f keyfile] [-m format] [-N new_passphrase]\n"
 	    "                   [-P old_passphrase]\n"
 	    "       ssh-keygen -i [-f input_keyfile] [-m key_format]\n"

ssh-sk-helper.8

@@ -0,0 +1,66 @@
+.\" $OpenBSD: ssh-sk-helper.8,v 1.1 2019/11/07 08:38:38 naddy Exp $
+.\"
+.\" Copyright (c) 2010 Markus Friedl.  All rights reserved.
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: November 7 2019 $
+.Dt SSH-SK-HELPER 8
+.Os
+.Sh NAME
+.Nm ssh-sk-helper
+.Nd ssh-agent helper program for security key support
+.Sh SYNOPSIS
+.Nm
+.Op Fl v
+.Sh DESCRIPTION
+.Nm
+is used by
+.Xr ssh-agent 1
+to access keys provided by a security key.
+.Pp
+.Nm
+is not intended to be invoked by the user, but from
+.Xr ssh-agent 1 .
+.Pp
+A single option is supported:
+.Bl -tag -width Ds
+.It Fl v
+Verbose mode.
+Causes
+.Nm
+to print debugging messages about its progress.
+This is helpful in debugging problems.
+Multiple
+.Fl v
+options increase the verbosity.
+The maximum is 3.
+.Pp
+Note that
+.Xr ssh-agent 1
+will automatically pass the
+.Fl v
+flag to
+.Nm
+when it has itself been placed in debug mode.
+.El
+.Sh SEE ALSO
+.Xr ssh 1 ,
+.Xr ssh-add 1 ,
+.Xr ssh-agent 1
+.Sh HISTORY
+.Nm
+first appeared in
+.Ox 6.7 .
+.Sh AUTHORS
+.An Damien Miller Aq Mt djm@openbsd.org

ssh.1

@@ -33,8 +33,8 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $OpenBSD: ssh.1,v 1.403 2019/06/12 11:31:50 jmc Exp $
+.\" $OpenBSD: ssh.1,v 1.404 2019/11/07 08:38:38 naddy Exp $
-.Dd $Mdocdate: June 12 2019 $
+.Dd $Mdocdate: November 7 2019 $
 .Dt SSH 1
 .Os
 .Sh NAME
@@ -279,6 +279,7 @@ public key authentication is read.
 The default is
 .Pa ~/.ssh/id_dsa ,
 .Pa ~/.ssh/id_ecdsa ,
+.Pa ~/.ssh/id_ecdsa_sk ,
 .Pa ~/.ssh/id_ed25519
 and
 .Pa ~/.ssh/id_rsa .
@@ -896,6 +897,8 @@ This stores the private key in
 (DSA),
 .Pa ~/.ssh/id_ecdsa
 (ECDSA),
+.Pa ~/.ssh/id_ecdsa_sk
+(security key-hosted ECDSA),
 .Pa ~/.ssh/id_ed25519
 (Ed25519),
 or
@@ -906,6 +909,8 @@ and stores the public key in
 (DSA),
 .Pa ~/.ssh/id_ecdsa.pub
 (ECDSA),
+.Pa ~/.ssh/id_ecdsa_sk.pub
+(security key-hosted ECDSA),
 .Pa ~/.ssh/id_ed25519.pub
 (Ed25519),
 or
@@ -1324,6 +1329,12 @@ More permanent VPNs are better provided by tools such as
 and
 .Xr isakmpd 8 .
 .Sh ENVIRONMENT
+.Bl -tag -width "SSH_ORIGINAL_COMMAND"
+.It Ev SSH_SK_PROVIDER
+Specifies the path to a security key provider library used to interact with
+hardware security keys.
+.Pp
+.El
 .Nm
 will normally set the following environment variables:
 .Bl -tag -width "SSH_ORIGINAL_COMMAND"
@@ -1484,6 +1495,7 @@ above.
 .Pp
 .It Pa ~/.ssh/id_dsa
 .It Pa ~/.ssh/id_ecdsa
+.It Pa ~/.ssh/id_ecdsa_sk
 .It Pa ~/.ssh/id_ed25519
 .It Pa ~/.ssh/id_rsa
 Contains the private key for authentication.
@@ -1498,6 +1510,7 @@ sensitive part of this file using AES-128.
 .Pp
 .It Pa ~/.ssh/id_dsa.pub
 .It Pa ~/.ssh/id_ecdsa.pub
+.It Pa ~/.ssh/id_ecdsa_sk.pub
 .It Pa ~/.ssh/id_ed25519.pub
 .It Pa ~/.ssh/id_rsa.pub
 Contains the public key for authentication.

ssh_config.5

@@ -33,8 +33,8 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $OpenBSD: ssh_config.5,v 1.304 2019/09/13 04:52:34 djm Exp $
+.\" $OpenBSD: ssh_config.5,v 1.305 2019/11/07 08:38:38 naddy Exp $
-.Dd $Mdocdate: September 13 2019 $
+.Dd $Mdocdate: November 7 2019 $
 .Dt SSH_CONFIG 5
 .Os
 .Sh NAME
@@ -381,7 +381,9 @@ flag to
 via
 .Xr ssh-agent 1 ,
 or via a
-.Cm PKCS11Provider .
+.Cm PKCS11Provider
+or
+.Cm SecurityKeyProvider .
 .Pp
 Arguments to
 .Cm CertificateFile
@@ -808,7 +810,8 @@ ecdsa-sha2-nistp256-cert-v01@openssh.com,
 ecdsa-sha2-nistp384-cert-v01@openssh.com,
 ecdsa-sha2-nistp521-cert-v01@openssh.com,
 ssh-ed25519-cert-v01@openssh.com,
-rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,
+rsa-sha2-512-cert-v01@openssh.com,
+rsa-sha2-256-cert-v01@openssh.com,
 ssh-rsa-cert-v01@openssh.com,
 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
 ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
@@ -840,7 +843,8 @@ ecdsa-sha2-nistp256-cert-v01@openssh.com,
 ecdsa-sha2-nistp384-cert-v01@openssh.com,
 ecdsa-sha2-nistp521-cert-v01@openssh.com,
 ssh-ed25519-cert-v01@openssh.com,
-rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,
+rsa-sha2-512-cert-v01@openssh.com,
+rsa-sha2-256-cert-v01@openssh.com,
 ssh-rsa-cert-v01@openssh.com,
 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
 ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
@@ -883,6 +887,8 @@ even if
 .Xr ssh-agent 1
 or a
 .Cm PKCS11Provider
+or
+.Cm SecurityKeyProvider
 offers more identities.
 The argument to this keyword must be
 .Cm yes
@@ -919,11 +925,12 @@ or the tokens described in the
 .Sx TOKENS
 section.
 .It Cm IdentityFile
-Specifies a file from which the user's DSA, ECDSA, Ed25519 or RSA authentication
+Specifies a file from which the user's DSA, ECDSA, security key-hosted ECDSA,
-identity is read.
+Ed25519 or RSA authentication identity is read.
 The default is
 .Pa ~/.ssh/id_dsa ,
 .Pa ~/.ssh/id_ecdsa ,
+.Pa ~/.ssh/id_ecdsa_sk ,
 .Pa ~/.ssh/id_ed25519
 and
 .Pa ~/.ssh/id_rsa .
@@ -1315,12 +1322,15 @@ character, then the specified key types will be placed at the head of the
 default set.
 The default for this option is:
 .Bd -literal -offset 3n
+sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,
 ecdsa-sha2-nistp256-cert-v01@openssh.com,
 ecdsa-sha2-nistp384-cert-v01@openssh.com,
 ecdsa-sha2-nistp521-cert-v01@openssh.com,
 ssh-ed25519-cert-v01@openssh.com,
-rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,
+rsa-sha2-512-cert-v01@openssh.com,
+rsa-sha2-256-cert-v01@openssh.com,
 ssh-rsa-cert-v01@openssh.com,
+sk-ecdsa-sha2-nistp256@openssh.com,
 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
 ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
 .Ed
@@ -1437,6 +1447,11 @@ an OpenSSH Key Revocation List (KRL) as generated by
 .Xr ssh-keygen 1 .
 For more information on KRLs, see the KEY REVOCATION LISTS section in
 .Xr ssh-keygen 1 .
+.It Cm SecurityKeyProvider
+Specifies a path to a security key provider library that will be used when
+loading any security key-hosted keys, overriding the default of using the
+.Ev SSH_SK_PROVIDER
+environment variable to specify a provider.
 .It Cm SendEnv
 Specifies what variables from the local
 .Xr environ 7

sshd.8

@@ -33,8 +33,8 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $OpenBSD: sshd.8,v 1.304 2018/07/22 12:16:59 dtucker Exp $
+.\" $OpenBSD: sshd.8,v 1.305 2019/11/07 08:38:38 naddy Exp $
-.Dd $Mdocdate: July 22 2018 $
+.Dd $Mdocdate: November 7 2019 $
 .Dt SSHD 8
 .Os
 .Sh NAME
@@ -429,24 +429,35 @@ comments).
 Public keys consist of the following space-separated fields:
 options, keytype, base64-encoded key, comment.
 The options field is optional.
-The keytype is
+The supported key types are:
-.Dq ecdsa-sha2-nistp256 ,
+.Pp
-.Dq ecdsa-sha2-nistp384 ,
+.Bl -item -compact -offset indent
-.Dq ecdsa-sha2-nistp521 ,
+.It
-.Dq ssh-ed25519 ,
+sk-ecdsa-sha2-nistp256@openssh.com
-.Dq ssh-dss
+.It
-or
+ecdsa-sha2-nistp256
-.Dq ssh-rsa ;
+.It
-the comment field is not used for anything (but may be convenient for the
+ecdsa-sha2-nistp384
+.It
+ecdsa-sha2-nistp521
+.It
+ssh-ed25519
+.It
+ssh-dss
+.It
+ssh-rsa
+.El
+.Pp
+The comment field is not used for anything (but may be convenient for the
 user to identify the key).
 .Pp
 Note that lines in this file can be several hundred bytes long
 (because of the size of the public key encoding) up to a limit of
-8 kilobytes, which permits DSA keys up to 8 kilobits and RSA
+8 kilobytes, which permits RSA keys up to 16 kilobits.
-keys up to 16 kilobits.
 You don't want to type them in; instead, copy the
 .Pa id_dsa.pub ,
 .Pa id_ecdsa.pub ,
+.Pa id_ecdsa_sk.pub ,
 .Pa id_ed25519.pub ,
 or the
 .Pa id_rsa.pub

sshd_config.5

@@ -33,8 +33,8 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $OpenBSD: sshd_config.5,v 1.290 2019/09/06 14:45:34 naddy Exp $
+.\" $OpenBSD: sshd_config.5,v 1.291 2019/11/07 08:38:38 naddy Exp $
-.Dd $Mdocdate: September 6 2019 $
+.Dd $Mdocdate: November 7 2019 $
 .Dt SSHD_CONFIG 5
 .Os
 .Sh NAME
@@ -690,7 +690,8 @@ ecdsa-sha2-nistp256-cert-v01@openssh.com,
 ecdsa-sha2-nistp384-cert-v01@openssh.com,
 ecdsa-sha2-nistp521-cert-v01@openssh.com,
 ssh-ed25519-cert-v01@openssh.com,
-rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,
+rsa-sha2-512-cert-v01@openssh.com,
+rsa-sha2-256-cert-v01@openssh.com,
 ssh-rsa-cert-v01@openssh.com,
 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
 ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
@@ -768,7 +769,8 @@ ecdsa-sha2-nistp256-cert-v01@openssh.com,
 ecdsa-sha2-nistp384-cert-v01@openssh.com,
 ecdsa-sha2-nistp521-cert-v01@openssh.com,
 ssh-ed25519-cert-v01@openssh.com,
-rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,
+rsa-sha2-512-cert-v01@openssh.com,
+rsa-sha2-256-cert-v01@openssh.com,
 ssh-rsa-cert-v01@openssh.com,
 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
 ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
@@ -1425,12 +1427,15 @@ character, then the specified key types will be placed at the head of the
 default set.
 The default for this option is:
 .Bd -literal -offset 3n
+sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,
 ecdsa-sha2-nistp256-cert-v01@openssh.com,
 ecdsa-sha2-nistp384-cert-v01@openssh.com,
 ecdsa-sha2-nistp521-cert-v01@openssh.com,
 ssh-ed25519-cert-v01@openssh.com,
-rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,
+rsa-sha2-512-cert-v01@openssh.com,
+rsa-sha2-256-cert-v01@openssh.com,
 ssh-rsa-cert-v01@openssh.com,
+sk-ecdsa-sha2-nistp256@openssh.com,
 ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
 ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
 .Ed