Mercurial > prosody-modules

annotate mod_auth_dovecot/mod_auth_dovecot.lua @ 267:76f3310ec113

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mod_auth_dovecot: Use PID in handshake
author Javier Torres <javitonino@gmail.com>
date Sat, 30 Oct 2010 23:38:19 +0200
parents 0f46fb2dbc79
children cfcd4efb0fa4
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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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14 local pposix = require "util.pposix";
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16 local prosody = _G.prosody;
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18 function new_default_provider(host)
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19 local provider = { name = "dovecot" };
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20 log("debug", "initializing dovecot authentication provider for host '%s'", host);
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22 function provider.test_password(username, password)
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23 log("debug", "test password '%s' for user %s at host %s", password, username, module.host);
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25 c = assert(socket.unix());
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26 assert(c:connect("/var/run/dovecot/auth-login")); -- FIXME: Hardcoded is bad
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28 local pid = pposix.getpid();
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29
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30 -- Send our handshake
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31 -- FIXME: Oh no! There are asserts everywhere
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32 assert(c:send("VERSION\t1\t1\n"));
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33 assert(c:send("CPID\t" .. pid .. "\n"));
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34
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35 -- Check their handshake
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36 local done = false;
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37 while (not done) do
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38 local l = assert(c:receive());
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39 parts = string.gmatch(l, "[^\t]+");
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40 first = parts();
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41 if (first == "VERSION") then
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42 assert(parts() == "1");
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43 assert(parts() == "1");
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44 elseif (first == "MECH") then
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45 local ok = false;
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46 for p in parts do
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47 if p == "PLAIN" then
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48 ok = true;
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49 end
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50 end
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51 assert(ok);
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52 elseif (first == "DONE") then
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53 done = true;
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54 end
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55 end
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56
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57 -- Send auth data
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58 username = username .. "@" .. module.host; -- FIXME: this is actually a hack for my server
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59 local b64 = base64.encode(username .. "\0" .. username .. "\0" .. password);
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60 local id = "54321"; -- FIXME: probably can just be a fixed value if making one request per connection
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61 assert(c:send("AUTH\t" .. id .. "\tPLAIN\tservice=XMPP\tresp=" .. b64 .. "\n"));
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62 local l = assert(c:receive());
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63 assert(c:close());
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64 local parts = string.gmatch(l, "[^\t]+");
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65
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66 if (parts() == "OK") then
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67 return true;
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68 else
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69 return nil, "Auth failed. Invalid username or password.";
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70 end
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71 end
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72
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73 function provider.get_password(username)
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74 return nil, "Cannot get_password in dovecot backend.";
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75 end
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76
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77 function provider.set_password(username, password)
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78 return nil, "Cannot set_password in dovecot backend.";
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79 end
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80
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81 function provider.user_exists(username)
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82 --TODO: Send an auth request. If it returns FAIL <id> user=<user> then user exists.
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83 return nil, "user_exists not yet implemented in dovecot backend.";
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84 end
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85
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86 function provider.create_user(username, password)
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87 return nil, "Cannot create_user in dovecot backend.";
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88 end
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89
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90 function provider.get_sasl_handler()
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91 local realm = module:get_option("sasl_realm") or module.host;
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92 local getpass_authentication_profile = {
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93 plain_test = function(username, password, realm)
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94 local prepped_username = nodeprep(username);
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95 if not prepped_username then
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96 log("debug", "NODEprep failed on username: %s", username);
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97 return "", nil;
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98 end
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99 return usermanager.test_password(prepped_username, realm, password), true;
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100 end
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101 };
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102 return new_sasl(realm, getpass_authentication_profile);
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103 end
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104
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105 return provider;
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106 end
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107
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108 module:add_item("auth-provider", new_default_provider(module.host));
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