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annotate mod_auth_dovecot/mod_auth_dovecot.lua @ 261:0f46fb2dbc79

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mod_auth_dovecot: Initial commit of Dovecot authentication backend by Javier Torres
author Matthew Wild <mwild1@gmail.com>
date Sun, 10 Oct 2010 21:43:50 +0100
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children 76f3310ec113
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0f46fb2dbc79 mod_auth_dovecot: Initial commit of Dovecot authentication backend by Javier Torres
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1 -- Dovecot authentication backend for Prosody
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2 --
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3 -- Copyright (C) 2010 Javier Torres
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4 -- Copyright (C) 2008-2010 Matthew Wild
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5 -- Copyright (C) 2008-2010 Waqas Hussain
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6 --
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7
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8 local socket_unix = require "socket.unix";
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9 local datamanager = require "util.datamanager";
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10 local log = require "util.logger".init("auth_internal_plain");
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11 local new_sasl = require "util.sasl".new;
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12 local nodeprep = require "util.encodings".stringprep.nodeprep;
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13 local base64 = require "util.encodings".base64;
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15 local prosody = _G.prosody;
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17 function new_default_provider(host)
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18 local provider = { name = "dovecot" };
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19 log("debug", "initializing dovecot authentication provider for host '%s'", host);
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21 function provider.test_password(username, password)
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22 log("debug", "test password '%s' for user %s at host %s", password, username, module.host);
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23
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24 c = assert(socket.unix());
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25 assert(c:connect("/var/run/dovecot/auth-login")); -- FIXME: Hardcoded is bad
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27 local pid = "12345"; -- FIXME: this should be an unique number between processes, recommendation is PID
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29 -- Send our handshake
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30 -- FIXME: Oh no! There are asserts everywhere
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31 assert(c:send("VERSION\t1\t1\n"));
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32 assert(c:send("CPID\t" .. pid .. "\n"));
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33
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34 -- Check their handshake
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35 local done = false;
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36 while (not done) do
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37 local l = assert(c:receive());
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38 parts = string.gmatch(l, "[^\t]+");
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39 first = parts();
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40 if (first == "VERSION") then
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41 assert(parts() == "1");
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42 assert(parts() == "1");
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43 elseif (first == "MECH") then
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44 local ok = false;
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45 for p in parts do
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46 if p == "PLAIN" then
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47 ok = true;
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48 end
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49 end
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50 assert(ok);
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51 elseif (first == "DONE") then
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52 done = true;
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53 end
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54 end
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55
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56 -- Send auth data
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57 username = username .. "@" .. module.host; -- FIXME: this is actually a hack for my server
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58 local b64 = base64.encode(username .. "\0" .. username .. "\0" .. password);
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59 local id = "54321"; -- FIXME: probably can just be a fixed value if making one request per connection
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60 assert(c:send("AUTH\t" .. id .. "\tPLAIN\tservice=XMPP\tresp=" .. b64 .. "\n"));
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61 local l = assert(c:receive());
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62 assert(c:close());
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63 local parts = string.gmatch(l, "[^\t]+");
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64
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65 if (parts() == "OK") then
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66 return true;
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67 else
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68 return nil, "Auth failed. Invalid username or password.";
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69 end
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70 end
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71
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72 function provider.get_password(username)
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73 return nil, "Cannot get_password in dovecot backend.";
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74 end
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75
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76 function provider.set_password(username, password)
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77 return nil, "Cannot set_password in dovecot backend.";
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78 end
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79
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80 function provider.user_exists(username)
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81 --TODO: Send an auth request. If it returns FAIL <id> user=<user> then user exists.
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82 return nil, "user_exists not yet implemented in dovecot backend.";
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83 end
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84
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85 function provider.create_user(username, password)
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86 return nil, "Cannot create_user in dovecot backend.";
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87 end
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88
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89 function provider.get_sasl_handler()
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90 local realm = module:get_option("sasl_realm") or module.host;
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91 local getpass_authentication_profile = {
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92 plain_test = function(username, password, realm)
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93 local prepped_username = nodeprep(username);
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94 if not prepped_username then
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95 log("debug", "NODEprep failed on username: %s", username);
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96 return "", nil;
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97 end
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98 return usermanager.test_password(prepped_username, realm, password), true;
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99 end
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100 };
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101 return new_sasl(realm, getpass_authentication_profile);
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102 end
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103
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104 return provider;
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105 end
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106
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107 module:add_item("auth-provider", new_default_provider(module.host));
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108