annotate mod_s2s_auth_dane/README.markdown @ 5063:53145c6b6b0b

mod_sasl2: Clear sasl_handler on final success
author Matthew Wild <mwild1@gmail.com>
date Thu, 13 Oct 2022 22:48:28 +0100
parents eb56e743abe8
children 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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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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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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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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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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94