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annotate mod_isr/mod_isr.lua @ 5616:59d5fc50f602

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mod_http_oauth2: Implement refresh token rotation Makes refresh tokens one-time-use, handing out a new refresh token with each access token. Thus if a refresh token is stolen and used by an attacker, the next time the legitimate client tries to use the previous refresh token, it will not work and the attack will be noticed. If the attacker does not use the refresh token, it becomes invalid after the legitimate client uses it. This behavior is recommended by draft-ietf-oauth-security-topics
author Kim Alvefur <zash@zash.se>
date Sun, 23 Jul 2023 02:56:08 +0200
parents 1cb762f72a91
children
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1cb762f72a91 mod_isr: XEP-0397: Instant Stream Resumption
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1 local st = require "util.stanza";
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2
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3 local mod_smacks = module:depends("smacks");
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4
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5 local xmlns_sasl2 = "urn:xmpp:sasl:1";
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6 local xmlns_sm = "urn:xmpp:sm:3";
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7 local xmlns_isr = "https://xmpp.org/extensions/isr/0";
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8 local xmlns_errors = "urn:ietf:params:xml:ns:xmpp-stanzas";
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9
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10 module:hook_tag(xmlns_sasl2, "authenticate", function (session, auth)
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11 local isr_resume = auth:get_child("inst-resume", xmlns_isr);
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12 if not isr_resume then return end
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13 local is_using_token = isr_resume.attr["with-isr-token"] ~= "false";
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14 if is_using_token then
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15 -- TODO: If authing with token, set session.sasl_handler to our own
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16 -- event.session.sasl_handler = ...
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17 error("not yet implemented");
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18 end
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19
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20 -- Cache resume element for future processing after SASL success
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21 session.isr_sm_resume = isr_resume:get_child("resume", "urn:xmpp:sm:3");
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22 end, 100);
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23
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24 module:hook("sasl2/c2s/success", function (event)
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25 local session = event.session;
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26 local sm_resume = session.isr_sm_resume;
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27 if sm_resume then
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28 session.isr_sm_resume = nil;
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29 local resumed, err = mod_smacks.do_resume(session, sm_resume);
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30 if not resumed then
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31 local failed = st.stanza("failed", { xmlns = xmlns_sm, h = ("%d"):format(err.context.h) })
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32 :tag(err.condition, { xmlns = xmlns_errors });
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33 event.success:add_child(failed);
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34 else
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35 event.session = resumed.session;
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36 event.isr_resumed = resumed;
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37 event.success:tag("resumed", { xmlns = xmlns_sm,
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38 h = ("%d"):format(event.session.handled_stanza_count);
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39 previd = resumed.id; }):up();
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40 end
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41 end
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42 end, 100);
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43
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44 module:hook("sasl2/c2s/success", function (event)
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45 -- The authenticate response has already been sent at this point
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46 local resumed = event.isr_resumed;
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47 if resumed then
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48 resumed.finish(); -- Finish resume and sync stanzas
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49 end
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50 end, -1100);
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51
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52 module:hook("sasl2/c2s/failure", function (event)
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53 event.session.isr_sm_resume = nil;
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54 end);
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55