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mod_vcard_muc: Add an alternative method of signaling avatar change When the avatar has been changed, a signal is sent that the room configuration has changed. Clients then do a disco#info query to find the SHA-1 of the new avatar. They can then fetch it as before, or not if they have it cached already. This is meant to be less disruptive than signaling via presence, which caused problems for some clients. If clients transition to the new method, the old one can eventually be removed. The namespace is made up while waiting for standardization. Otherwise it is very close to what's described in https://xmpp.org/extensions/inbox/muc-avatars.html
author Kim Alvefur <zash@zash.se>
date Sun, 25 Aug 2019 20:46:43 +0200
parents a6486881fe42
children daabba8fb45b
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1 ---
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2 labels:
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3 - 'Stage-Alpha'
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4 - 'Type-S2SAuth'
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5 summary: S2S authentication using DANE
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6 ...
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7
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8 Introduction
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9 ============
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10
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11 This module implements DANE as described in [Using DNS Security
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12 Extensions (DNSSEC) and DNS-based Authentication of Named Entities
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13 (DANE) as a Prooftype for XMPP Domain Name
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14 Associations](http://tools.ietf.org/html/draft-miller-xmpp-dnssec-prooftype).
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16 Dependencies
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17 ============
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18
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19 This module requires a DNSSEC aware DNS resolver. Prosodys internal DNS
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20 module does not support DNSSEC. Therefore, to use this module, a
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21 replacement is needed, such as [this
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22 one](https://www.zash.se/luaunbound.html).
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24 LuaSec 0.5 or later is also required.
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26 Configuration
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27 =============
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28
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29 After [installing the module][doc:installing\_modules], just add it to
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30 `modules_enabled`;
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31
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32 modules_enabled = {
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33 ...
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34 "s2s_auth_dane";
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35 }
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36
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37 DANE Uses
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38 ---------
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39
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40 By default, only DANE uses are enabled.
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41
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42 dane_uses = { "DANE-EE", "DANE-TA" }
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43
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44 Use flag Description
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45 ----------- -------------------------------------------------------------------------------------------------------
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46 `DANE-EE` Most simple use, usually a fingerprint of the full certificate or public key used the service
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47 `DANE-TA` Fingerprint of a certificate or public key that has been used to issue the service certificate
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48 `PKIX-EE` Like `DANE-EE` but the certificate must also pass normal PKIX trust checks (ie standard certificates)
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49 `PKIX-TA` Like `DANE-TA` but must also pass normal PKIX trust checks (ie standard certificates)
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50
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51 DNS Setup
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52 =========
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53
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54 In order for other services to verify your site using using this plugin,
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55 you need to publish TLSA records (and they need to have this plugin).
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56 Here's an example using `DANE-EE Cert SHA2-256` for a host named
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57 `xmpp.example.com` serving the domain `example.com`.
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58
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59 $ORIGIN example.com.
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60 ; Your standard SRV record
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61 _xmpp-server._tcp.example.com IN SRV 0 0 5269 xmpp.example.com.
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62 ; IPv4 and IPv6 addresses
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63 xmpp.example.com. IN A 192.0.2.68
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64 xmpp.example.com. IN AAAA 2001:0db8:0000:0000:4441:4e45:544c:5341
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65
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66 ; The DANE TLSA records.
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67 _5269._tcp.xmpp.example.com. 300 IN TLSA 3 0 1 E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855
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68
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69 ; If your zone file tooling does not support TLSA records, you can try the raw binary format:
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70 _5269._tcp.xmpp.example.com. 300 IN TYPE52 \# 35 030001E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855
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71
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72 [List of DNSSEC and DANE
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73 tools](http://www.internetsociety.org/deploy360/dnssec/tools/)
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74
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75 Further reading
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76 ===============
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77
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78 - [DANE Operational Guidance][rfc7671]
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79
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80 Compatibility
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81 =============
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82
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83 Requires 0.9 or above.
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84
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85 Known issues
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86 ============
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87
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88 - A race condition between the DANE lookup and completion of the TLS
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89 handshake may cause a crash. This does not happen in **trunk**
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90 thanks to better async support.
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92