Mercurial > prosody-modules

annotate mod_auth_token/token_auth_utils.lib.lua @ 3518:95c1c3e057cf

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
mod_pubsub_github: Fix publish date
author Kim Alvefur <zash@zash.se>
date Sun, 31 Mar 2019 18:14:59 +0200
parents ac1f63cdb6d6
children 6b3181fe5617
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2956
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
1 local base64 = require "util.encodings".base64;
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
2 local digest = require "openssl.digest";
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
3 local hmac = require "openssl.hmac";
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
4 local luatz = require "luatz";
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
5 local otp = require "otp";
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
6
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
7 local DIGEST_TYPE = "SHA256";
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
8 local OTP_DEVIATION = 1;
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
9 local OTP_DIGITS = 8;
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
10 local OTP_INTERVAL = 30;
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
11
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
12 local nonce_cache = {};
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
13
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
14 function check_nonce(jid, otp, nonce)
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
15 -- We cache all nonces used per OTP, to ensure that a token cannot be used
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
16 -- more than once.
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
17 --
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
18 -- We assume that the OTP is valid in the current time window. This is the
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
19 -- case because we only call check_nonce *after* the OTP has been verified.
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
20 --
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
21 -- We only store one OTP per JID, so if a new OTP comes in, we wipe the
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
22 -- previous OTP and its cached nonces.
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
23 if nonce_cache[jid] == nil or nonce_cache[jid][otp] == nil then
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
24 nonce_cache[jid] = {}
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
25 nonce_cache[jid][otp] = {}
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
26 nonce_cache[jid][otp][nonce] = true
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
27 return true;
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
28 end
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
29 if nonce_cache[jid][otp][nonce] == true then
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
30 return false;
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
31 else
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
32 nonce_cache[jid][otp][nonce] = true;
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
33 return true;
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
34 end
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
35 end
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
36
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
37
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
38 function verify_token(username, password, realm, otp_seed, token_secret, log)
3472
ac1f63cdb6d6 mod_auth_token: Check realm against module.host
JC Brand <jc@opkode.com>
parents: 2956
diff changeset
39 if (realm ~= module.host) then
ac1f63cdb6d6 mod_auth_token: Check realm against module.host
JC Brand <jc@opkode.com>
parents: 2956
diff changeset
40 log("debug", "Verification failed: realm ~= module.host");
ac1f63cdb6d6 mod_auth_token: Check realm against module.host
JC Brand <jc@opkode.com>
parents: 2956
diff changeset
41 return false;
ac1f63cdb6d6 mod_auth_token: Check realm against module.host
JC Brand <jc@opkode.com>
parents: 2956
diff changeset
42 end
ac1f63cdb6d6 mod_auth_token: Check realm against module.host
JC Brand <jc@opkode.com>
parents: 2956
diff changeset
43
2956
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
44 local totp = otp.new_totp_from_key(otp_seed, OTP_DIGITS, OTP_INTERVAL)
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
45 local token = string.match(password, "(%d+) ")
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
46 local otp = token:sub(1,8)
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
47 local nonce = token:sub(9)
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
48 local signature = base64.decode(string.match(password, " (.+)"))
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
49 local jid = username.."@"..realm
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
50
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
51 if totp:verify(otp, OTP_DEVIATION, luatz.gmtime(luatz.time())) then
3472
ac1f63cdb6d6 mod_auth_token: Check realm against module.host
JC Brand <jc@opkode.com>
parents: 2956
diff changeset
52 log("debug", "The TOTP was verified");
2956
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
53 local hmac_ctx = hmac.new(token_secret, DIGEST_TYPE)
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
54 if signature == hmac_ctx:final(otp..nonce..jid) then
3472
ac1f63cdb6d6 mod_auth_token: Check realm against module.host
JC Brand <jc@opkode.com>
parents: 2956
diff changeset
55 log("debug", "The key was verified");
2956
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
56 if check_nonce(jid, otp, nonce) then
3472
ac1f63cdb6d6 mod_auth_token: Check realm against module.host
JC Brand <jc@opkode.com>
parents: 2956
diff changeset
57 log("debug", "The nonce was verified");
2956
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
58 return true;
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
59 end
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
60 end
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
61 end
3472
ac1f63cdb6d6 mod_auth_token: Check realm against module.host
JC Brand <jc@opkode.com>
parents: 2956
diff changeset
62 log("debug", "Verification failed");
2956
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
63 return false;
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
64 end
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
65
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
66 return {
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
67 OTP_DEVIATION = OTP_DIGITS,
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
68 OTP_DIGITS = OTP_DIGITS,
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
69 OTP_INTERVAL = OTP_INTERVAL,
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
70 DIGEST_TYPE = DIGEST_TYPE,
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
71 verify_token = verify_token;
d0ca211e1b0e New HMAC token authentication module for Prosody.
JC Brand <jc@opkode.com>
parents:
diff changeset
72 }