- (tim) [kex.c myproposal.h md-sha256.c openbsd-compat/sha2.c,h] Disable

[openssh.git] / ssh-keygen.1

diff --git a/ssh-keygen.1 b/ssh-keygen.1
index 3987b1e666159af28bad12a56d91937ce4e1db76..ab16bcd77731f6405a400579f6da4e341d5d4ff5 100644 (file)
--- a/ssh-keygen.1
+++ b/ssh-keygen.1
@@ -1,4 +1,4 @@
-.\"    $OpenBSD: ssh-keygen.1,v 1.66 2005/03/01 18:15:56 jmc Exp $
+.\"    $OpenBSD: ssh-keygen.1,v 1.72 2005/11/28 05:16:53 dtucker Exp $
 .\"
 .\"  -*- nroff -*-
 .\"
@@ -118,6 +118,9 @@ keys for use by SSH protocol version 2.
 The type of key to be generated is specified with the
 .Fl t
 option.
+If invoked without any arguments,
+.Nm
+will generate an RSA key for use in SSH protocol 2 connections.
 .Pp
 .Nm
 is also used to generate groups for use in Diffie-Hellman group
@@ -129,10 +132,10 @@ section for details.
 Normally each user wishing to use SSH
 with RSA or DSA authentication runs this once to create the authentication
 key in
-.Pa $HOME/.ssh/identity ,
-.Pa $HOME/.ssh/id_dsa
+.Pa ~/.ssh/identity ,
+.Pa ~/.ssh/id_dsa
 or
-.Pa $HOME/.ssh/id_rsa .
+.Pa ~/.ssh/id_rsa .
 Additionally, the system administrator may use this to generate host keys,
 as seen in
 .Pa /etc/rc .
@@ -187,9 +190,9 @@ command.
 Show the bubblebabble digest of specified private or public key file.
 .It Fl b Ar bits
 Specifies the number of bits in the key to create.
-Minimum is 512 bits.
-Generally, 1024 bits is considered sufficient.
-The default is 1024 bits.
+For RSA keys, the minimum size is 768 bits and the default is 2048 bits.
+Generally, 2048 bits is considered sufficient.
+DSA keys must be exactly 1024 bits as specified by FIPS 186-2.
 .It Fl C Ar comment
 Provides a new comment.
 .It Fl c
@@ -232,8 +235,10 @@ command.
 .It Fl H
 Hash a
 .Pa known_hosts
-file, printing the result to standard output.
-This replaces all hostnames and addresses with hashed representations.
+file.
+This replaces all hostnames and addresses with hashed representations
+within the specified file; the original content is moved to a file with
+a .old suffix.
 These hashes may be used normally by
 .Nm ssh
 and
@@ -379,7 +384,7 @@ It is important that this file contains moduli of a range of bit lengths and
 that both ends of a connection share common moduli.
 .Sh FILES
 .Bl -tag -width Ds
-.It Pa $HOME/.ssh/identity
+.It Pa ~/.ssh/identity
 Contains the protocol version 1 RSA authentication identity of the user.
 This file should not be readable by anyone but the user.
 It is possible to
@@ -390,14 +395,14 @@ This file is not automatically accessed by
 but it is offered as the default file for the private key.
 .Xr ssh 1
 will read this file when a login attempt is made.
-.It Pa $HOME/.ssh/identity.pub
+.It Pa ~/.ssh/identity.pub
 Contains the protocol version 1 RSA public key for authentication.
 The contents of this file should be added to
-.Pa $HOME/.ssh/authorized_keys
+.Pa ~/.ssh/authorized_keys
 on all machines
 where the user wishes to log in using RSA authentication.
 There is no need to keep the contents of this file secret.
-.It Pa $HOME/.ssh/id_dsa
+.It Pa ~/.ssh/id_dsa
 Contains the protocol version 2 DSA authentication identity of the user.
 This file should not be readable by anyone but the user.
 It is possible to
@@ -408,14 +413,14 @@ This file is not automatically accessed by
 but it is offered as the default file for the private key.
 .Xr ssh 1
 will read this file when a login attempt is made.
-.It Pa $HOME/.ssh/id_dsa.pub
+.It Pa ~/.ssh/id_dsa.pub
 Contains the protocol version 2 DSA public key for authentication.
 The contents of this file should be added to
-.Pa $HOME/.ssh/authorized_keys
+.Pa ~/.ssh/authorized_keys
 on all machines
 where the user wishes to log in using public key authentication.
 There is no need to keep the contents of this file secret.
-.It Pa $HOME/.ssh/id_rsa
+.It Pa ~/.ssh/id_rsa
 Contains the protocol version 2 RSA authentication identity of the user.
 This file should not be readable by anyone but the user.
 It is possible to
@@ -426,10 +431,10 @@ This file is not automatically accessed by
 but it is offered as the default file for the private key.
 .Xr ssh 1
 will read this file when a login attempt is made.
-.It Pa $HOME/.ssh/id_rsa.pub
+.It Pa ~/.ssh/id_rsa.pub
 Contains the protocol version 2 RSA public key for authentication.
 The contents of this file should be added to
-.Pa $HOME/.ssh/authorized_keys
+.Pa ~/.ssh/authorized_keys
 on all machines
 where the user wishes to log in using public key authentication.
 There is no need to keep the contents of this file secret.