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mod_s2s_auth_dane/README.markdown

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mod_auth_ccert/README: Add setting to ensure Prosdy asks for client certificate This used to be the default for all services, but since it triggers annoying popups in web browsers it was inverted in Prosody and only s2s enables it, so it needs to be explicitly enabled for c2s again. See trunk 115b5e32d960 Thanks debacle
author Kim Alvefur <zash@zash.se>
date Sat, 06 Feb 2021 21:34:25 +0100
parent 3991:eb56e743abe8
child 5120:83afe4078e6e
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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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23
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24 LuaSec 0.5 or later is also required.
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25
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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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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 Works with Prosody 0.9 until 0.11.
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84
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85 **Broken** since [trunk revision 756b8821007a](https://hg.prosody.im/trunk/rev/756b8821007a).
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86
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87 Known issues
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88 ============
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89
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90 - A race condition between the DANE lookup and completion of the TLS
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91 handshake may cause a crash. This does not happen in **trunk**
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92 thanks to better async support.
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93
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94