prosody-modules
942738953ff3
mod_auth_dovecot/auth_dovecot/mod_auth_dovecot.lua

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mod_auth_dovecot/auth_dovecot/mod_auth_dovecot.lua @ 474:942738953ff3

mod_auth_dovecot: Replace with SASL proxying version.
author Kim Alvefur <zash@zash.se>
date Thu, 10 Nov 2011 11:24:31 +0100
child 700:0c130c45b7c1
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474
942738953ff3 mod_auth_dovecot: Replace with SASL proxying version.
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1 -- Dovecot authentication backend for Prosody
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2 --
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3 -- Copyright (C) 2010-2011 Waqas Hussain
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4 -- Copyright (C) 2011 Kim Alvefur
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5 --
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6
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7 local name = "Dovecot SASL";
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8 local log = require "util.logger".init("auth_dovecot");
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9
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10 local socket_path = module:get_option_string("dovecot_auth_socket", "/var/run/dovecot/auth-login");
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11 local socket_host = module:get_option_string("dovecot_auth_host", "127.0.0.1");
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12 local socket_port = module:get_option_string("dovecot_auth_port");
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13
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14 local service_realm = module:get_option("realm");
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15 local service_name = module:get_option("service_name");
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16 local append_host = module:get_option_boolean("auth_append_host");
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17 local validate_domain = module:get_option_boolean("validate_append_host");
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18 local handle_appended = module:get_option_string("handle_appended");
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19 local util_sasl_new = require "util.sasl".new;
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20
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21 local new_dovecot_sasl = module:require "sasl_dovecot".new;
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22
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23 local new_sasl = function(realm)
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24 return new_dovecot_sasl(
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25 service_realm or realm,
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26 service_name or "xmpp",
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27
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28 socket_port and { socket_path, socket_port } or socket_path,
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29
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30 { --config
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31 handle_domain = handle_appended or
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32 (append_host and "split" or "escape"),
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33 validate_domain = validate_domain,
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34 }
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35 );
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36 end
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37
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38 do
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39 local s = new_sasl(module.host)
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40 assert(s, "Could not create a new SASL object");
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41 assert(s.mechanisms, "SASL object has no mechanims method");
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42 local m, _m = {}, s:mechanisms();
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43 assert(not append_host or _m.PLAIN, "auth_append_host requires PLAIN, but it is unavailable");
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44 for k in pairs(_m) do
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45 table.insert(m, k);
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46 end
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47 log("debug", "Mechanims found: %s", table.concat(m, ", "));
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48 end
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49
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50 provider = {
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51 name = module.name:gsub("^auth_","");
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52 };
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53
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54 function provider.test_password(username, password)
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55 return new_sasl(module.host):plain_test(username, password);
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56 end
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57
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58 if append_host then
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59 new_sasl = function(realm)
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60 return util_sasl_new(realm, {
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61 plain_test = function(sasl, username, password, realm)
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62 local prepped_username = nodeprep(username);
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63 if not prepped_username then
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64 log("debug", "NODEprep failed on username: %s", username);
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65 return "", nil;
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66 end
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67 prepped_username = prepped_username .. "@" .. module.host;
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68 return provider.test_password(prepped_username, password), true;
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69 end,
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70 });
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71 end
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72 end
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73
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74 function provider.get_password(username)
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75 return nil, "Passwords unavailable for "..name;
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76 end
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77
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78 function provider.set_password(username, password)
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79 return nil, "Passwords unavailable for "..name;
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80 end
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81
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82 function provider.user_exists(username)
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83 local user_test = new_sasl(module.host);
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84 user_test:select("PLAIN");
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85 user_test:process(("\0%s\0"):format(username));
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86 return user_test.username == username;
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87 end
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88
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89 function provider.create_user(username, password)
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90 return nil, "Account creation/modification not available with "..name;
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91 end
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92
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93 function provider.get_sasl_handler()
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94 return new_sasl(module.host);
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95 end
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96
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97 module:add_item("auth-provider", provider);
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98