1 Monkeysphere User README
2 ========================
4 You don't have to be an OpenSSH or OpenPGP expert to use the
5 Monkeysphere. However, you should be comfortable using secure shell
6 (ssh), and you should already have GnuPG installed and an OpenPGP key
9 As a regular user on a system where the monkeysphere package is
10 installed, you probably want to do a few things:
13 Keep your keyring up-to-date
14 ----------------------------
16 Regularly refresh your GnuPG keyring from the keyservers. This can be
17 done with a simple cronjob. An example of crontab line to do this is:
19 0 12 * * * /usr/bin/gpg --refresh-keys > /dev/null 2>&1
21 This would refresh your keychain every day at noon.
24 Keeping your known_hosts file in sync with your keyring
25 -------------------------------------------------------
27 With your keyring updated, you want to make sure that OpenSSH can
28 still see the most recent trusted information about who the various
29 hosts are. This can be done with the monkeysphere-ssh-proxycommand
30 (see next section) or with the update-known_hosts command:
32 $ monkeysphere update-known_hosts
34 This command will check to see if there is an OpenPGP key for
35 each (non-hashed) host listed in the known_hosts file, and then add
36 the key for that host to the known_hosts file if one is found. This
37 command could be added to a crontab as well, if desired.
40 Using monkeysphere-ssh-proxycommand(1)
41 --------------------------------------
43 The best way to handle host keys is to use the monkeysphere ssh proxy
44 command. This command will make sure the known_hosts file is
45 up-to-date for the host you are connecting to with ssh. The best way
46 to integrate this is to add the following line to the "Host *" section
47 of your ~/.ssh/config file:
49 ProxyCommand monkeysphere-ssh-proxycommand %h %p
51 The "Host *" section specifies what ssh options to use for all
52 connections. If you don't already have a "Host *" line, you can add it
57 On a line by itself. Add the ProxyCommand line just below it.
59 Once you've completed this step - you are half-way there. You will now
60 be able to verify servers participating in the monkeysphere provided
61 their keys have been signed by someone that you trust.
63 FIXME: We should setup a way for someone to download a test gpg key and
64 then connect to a test server that is signed by this gpg key so users
65 can establish that they are setup correctly.
67 The remaining steps will complete the second half: allow servers to
68 verify you based on your OpenPGP key.
71 Setting up an OpenPGP authentication key
72 ----------------------------------------
74 First things first: you'll need to create a new subkey for your
75 current key, if you don't already have one. If your OpenPGP key is
76 keyid $GPGID, you can set up such a subkey relatively easily with:
78 $ monkeysphere gen-subkey $GPGID
80 Typically, you can find out what your keyid is by running:
82 $ gpg --list-secret-keys
84 The first line (starting with sec) will include your key length followed
85 by the type of key (e.g. 1024D) followed by a slash and then your keyid.
88 Using your OpenPGP authentication key for SSH
89 ---------------------------------------------
91 Once you have created an OpenPGP authentication key, you will need to
92 feed it to your ssh agent.
94 Currently (2008-08-23), gnutls does not support this operation. In order
95 to take this step, you will need to upgrade to a patched version of
96 gnutls. You can easily upgrade a Debian system by adding the following
97 to /etc/apt/sources.list.d/monkeysphere.list:
99 deb http://monkeysphere.info/debian experimental gnutls
100 deb-src http://monkeysphere.info/debian experimental gnutls
102 Next, run `aptitude update; aptitude install libgnuttls26`.
104 With the patched gnutls installed, you can feed your authentication sub
105 key to your ssh agent by running:
107 $ monkeysphere subkey-to-ssh-agent
109 FIXME: using the key with a single session?
115 Users can also maintain their own authorized_keys files, for users
116 that would be logging into their accounts. This is primarily useful
117 for accounts on hosts that are not already systematically using the
118 monkeysphere for user authentication. If you're not sure whether this
119 is the case for your host, ask your system administrator.
121 If you want to do this as a regular user, use the
122 update-authorized_keys command:
124 $ monkeysphere update-authorized_keys
126 This command will take all the user IDs listed in the
127 ~/.config/monkeysphere/authorized_user_ids file and check to see if
128 there are acceptable keys for those user IDs available. If so, they
129 will be added to the ~/.ssh/authorized_keys file.
131 You must have indicated reasonable ownertrust in some key for this
132 account, or no keys will be found with trusted certification paths.
134 If you find this useful, you might want to place a job like this in
135 your crontab so that revocations and rekeyings can take place