Mercurial > prosody-modules

annotate mod_auth_internal_yubikey/README.markdown @ 4028:a0db4a0e66f1

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
mod_measure_message_e2ee: Add a warning for small servers leaking user behaviour.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Wed, 20 May 2020 16:42:32 +0200
parents 4d73a1a6ba68
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
1 ---
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
2 labels:
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
3 - 'Stage-Beta'
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
4 - 'Type-Auth'
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
5 summary: 'Two-factor authentication using Yubikeys'
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
6 ...
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
7
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
8 Introduction
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
9 ============
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
10
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
11 A [YubiKey](http://www.yubico.com/yubikey) is a small USB
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
12 one-time-password (OTP) generator.
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
13
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
14 The idea behind one-time-passwords is that they can, well, only be used
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
15 once. After authenticating with an OTP the only way to log in again is
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
16 to calculate another one and use that. The only (practical) way to
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
17 generate this is by inserting the (correct) Yubikey and pressing its
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
18 button. Acting as a USB keyboard it then "types" the OTP into the
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
19 password prompt of your XMPP client.
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
20
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
21 Details
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
22 =======
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
23
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
24 This self-contained module handles all the authentication of Yubikeys,
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
25 it does not for example depend on the Yubico authentication service, or
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
26 on any external system service such as PAM.
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
27
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
28 When this module is enabled, only PLAIN authentication is enabled on the
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
29 server (because Prosody needs to receive the full password from the
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
30 client to decode it, not a hash), so connection encryption will
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
31 automatically be enforced by Prosody.
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
32
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
33 Even if the password is intercepted it is of little use to the attacker
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
34 as it expires as soon as it is used. Additionally the data stored in
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
35 Prosody's DB is not enough to authenticate as the user if stolen by the
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
36 attacker.
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
37
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
38 When this module is in use each user can either use normal password
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
39 authentication, or instead have their account associated with a
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
40 Yubikey - at which point only the key will work.
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
41
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
42 Installation
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
43 ============
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
44
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
45 Requires bitlib for Lua, and yubikey-lua from
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
46 http://code.matthewwild.co.uk/yubikey-lua . When properly installed, the
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
47 command `lua -lbit -lyubikey` should give you a Lua prompt with no
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
48 errors.
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
49
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
50 Configuration
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
51 =============
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
52
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
53 Associating keys
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
54 ----------------
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
55
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
56 Each Yubikey is configured with several pieces of information that
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
57 Prosody needs to know. This information is shown in the Yubikey
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
58 personalization tool (the *yubikey-personalization* package in
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
59 Debian/Ubuntu).
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
60
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
61 To associate a Yubikey with a user, run the following prosodyctl
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
62 command:
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
63
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
64 prosodyctl mod_auth_internal_yubikey associate user@example.com
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
65
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
66 This will run you through a series of questions about the information
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
67 Prosody requires about the key configuration.
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
68
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
69 **NOTE:** All keys used with the server (rather, with a given host) must
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
70 all have a "public ID" (uid) of the same length. This length must be set
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
71 in the Prosody config with the 'yubikey\_prefix\_length' option.
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
72
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
73 Instead of entering the information interactively it is also possible to
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
74 specify each option on the command-line (useful for automation)
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
75 via --option="value". The valid options are:
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
76
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
77 password The user's password (may be blank)
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
78 ---------- --------------------------------------------------------------------------------------------
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
79 fixed The public ID that the Yubikey prefixes to the OTP
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
80 uid The private ID that the Yubikey encrypts in the OTP
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
81 key The AES key that the Yubikey uses (may be blank if a global shared key is used, see below)
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
82
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
83 If a password is configured for the user (recommended) they must enter
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
84 this into the password box immediately before the OTP. This password
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
85 doesn't have to be incredibly long or secure, but it prevents the
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
86 Yubikey being used for authentication if it is stolen and the password
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
87 isn't known.
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
88
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
89 Configuring Prosody
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
90 -------------------
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
91
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
92 To use this module for authentication, set in the config:
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
93
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
94 authentication = "internal_yubikey"
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
95
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
96 Module-specific options:
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
97
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
98 yubikey\_prefix\_length (**REQUIRED**) The length of the public ID prefixed to the OTPs
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
99 ------------------------- -------------------------------------------------------------------------------------------------------------------
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
100 yubikey\_global\_key If all Yubikeys use the same AES key, you can specify it here. Pass --key="" to prosodyctl when associating keys.
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
101
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
102 If switching from a plaintext storage auth module then users without
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
103 Yubikeys associated with their account can continue to use their
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
104 existing passwords as normal, otherwise password resets are required.
1782
29f3d6b7ad16 Import wiki pages
Kim Alvefur <zash@zash.se>
parents:
diff changeset
105
1803
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
106 Compatibility
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
107 =============
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
108
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
109 ----- -------
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
110 0.8 Works
4d73a1a6ba68 Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents: 1782
diff changeset
111 ----- -------