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annotate mod_openid/README.markdown @ 3902:341850e8866f

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mod_muc_moderation: Broadcast retraction via method that saves it Otherwise the retraction is not saved to history, so that those who join after it was sent are unaware of the retraction
author Kim Alvefur <zash@zash.se>
date Sat, 22 Feb 2020 21:41:31 +0100
parents b42eb10dc7d2
children
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1 ---
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2 labels:
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3 - 'Stage-Alpha'
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4 summary: Enables Prosody to act as an OpenID provider
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5 ...
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6
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7 Introduction
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8 ============
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9
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10 [OpenID](http://openid.net/) is an decentralized authentication
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11 mechanism for the Web. mod\_openid turns Prosody into an OpenID
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12 *provider*, allowing users to use their Prosody credentials to
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13 authenticate with various third party websites.
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14
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15 Caveats
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16 =======
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17
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18 mod\_openid can best be described as a **proof-of-concept**, it has
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19 known deficiencies and should **not** be used in the wild as a
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20 legitimate OpenID provider. mod\_openid was developed using the Prosody
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21 0.4.x series, it has not been tested with the 0.5.x or later series.
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23 Details
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24 =======
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25
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26 OpenID works on the basis of a user proving to a third-party they wish
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27 to authenticate with, an OpenID *relaying party*, that they have claim
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28 or ownership over a URL, known as an OpenID *identifier*. mod\_openid
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29 uses Prosody's built in HTTP server to provide every user with an OpenID
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30 identifier of the form `http://host.domain.tld[:port]/openid/user`,
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31 which would be the OpenID identifier of the user with a Jabber ID of
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32 `user@host.domain.tld`.
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33
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34 Usage
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35 =====
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36
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37 Simply add "mod\_openid" to your modules\_enabled list. You may then use
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38 the OpenID identifier form as described above as your OpenID identifier.
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39 The port Prosody's HTTP server will listen on is currently set as 5280,
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40 meaning the full OpenID identifier of the user `romeo@montague.lit`
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41 would be `http://montague.lit:5280/openid/romeo`.
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42
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43 Configuration
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44 =============
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45
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46 mod\_openid has no configuration options as of this time.
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47
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48 TODO
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49 ====
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50
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51 The following is a list of the pending tasks which would have to be done
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52 to make mod\_openid fully featured. They are generally ranked in order
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53 of most importance with an estimated degree of difficulty.
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54
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55 1. Support Prosody 0.6.x series (**Medium**)
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56 2. Refactor code (**Medium**)
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57 - The code is pretty messy at the moment, it should be refactored
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58 to be more easily understood.
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59
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60 3. Disable use of "user@domain" OpenID identifier form (*Easy*)
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61 - This is a vestigial feature from the early design, allowing
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62 explicit specification of the JID. However the JID can be
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63 inferred from the simpler OpenID identifier form.
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64
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65 4. Use a cryptographically secure Pseudo Random Number Generator (PRNG)
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66 (**Medium**)
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67 - This would likely be accomplished using luacrypto which provides
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68 a Lua binding to the OpenSSL PRNG.
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69
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70 5. Make sure OpenID key-value pairs get signed in the right order
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71 (***Hard***)
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72 - It is important that the OpenID key-value responses be signed in
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73 the proper order so that the signature can be properly verified
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74 by the receiving party. This may be complicated by the fact that
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75 the iterative ordering of keys in a Lua table is not guaranteed
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76 for non-integer keys.
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77
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78 6. Do an actual match on the OpenID realm (**Medium**)
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79 - The code currently always returns true for matches against an
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80 OpenID realm, posing a security risk.
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81
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82 7. Don't use plain text authentication over HTTP (***Hard***)
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83 - This would require some Javascript to perform a digest.
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84
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85 8. Return meaningful error responses (**Medium**)
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86 - Most error responses are an HTTP 404 File Not Found, obviously
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87 something more meaningful could be returned.
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88
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89 9. Enable Association (***Hard***)
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90 - Association is a feature of the OpenID specification which
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91 reduces the number of round-trips needed to perform
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92 authentication.
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93
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94 10. Support HTTPS (**Medium**)
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95 - With option to only allow authentication through HTTPS
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96
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97 11. Enable OpenID 1.1 compatibility (**Medium**)
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98 - mod\_openid is designed from the OpenID 2.0 specification, which
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99 has an OpenID 1.1 compatibility mode.
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100
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101 12. Check specification compliance (**Medium**)
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102 - Walk through the code and make sure it complies with the OpenID
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103 specification. Comment code as necessary with the relevant
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104 sections in the specification.
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105
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106 Once all these steps are done, mod\_openid could be considered to have
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107 reached "beta" status and ready to real world use. The following are
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108 features that would be nice to have in a stable release:
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109
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110 1. Allow users to always trust realms (***Hard***)
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111 2. Allow users to remain logged in with a cookie (***Hard***)
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112 3. Enable simple registration using a user's vCard (**Medium**)
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113 4. More useful user identity page (***Hard***)
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114 - Allow users to alter what realms they trust and what simple
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115 registration information gets sent to relaying parties by
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116 default.
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117
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118 5. OpenID Bot (***Hard***)
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119 - Offers all functionality of the user identity page management
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120
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121 6. Better designed pages (*Easy*)
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122 - Use semantic XHTML and CSS to allow for custom styling.
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123 - Use the Prosody favicon.
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124
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125 Useful Links
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126 ============
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127
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128 - [OpenID Specifications](http://openid.net/developers/specs/)
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129 - [OpenID on Wikipedia](http://en.wikipedia.org/wiki/OpenID)