Mercurial > prosody-modules
annotate mod_auth_dovecot/mod_auth_dovecot.lua @ 372:000f1d1c6ca5
mod_blocking: Properly initialize the bootstrap privacy storage
author | Paul Aurich <paul@darkrain42.org> |
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date | Mon, 02 May 2011 23:14:13 -0700 |
parents | 8e9e5c7d97ff |
children | abac17cb5032 |
rev | line source |
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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 usermanager = require "core.usermanager"; |
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11 local log = require "util.logger".init("auth_dovecot"); |
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12 local new_sasl = require "util.sasl".new; |
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13 local nodeprep = require "util.encodings".stringprep.nodeprep; |
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14 local base64 = require "util.encodings".base64; |
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15 local sha1 = require "util.hashes".sha1; |
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16 |
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17 local prosody = prosody; |
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18 local socket_path = module:get_option_string("dovecot_auth_socket", "/var/run/dovecot/auth-login"); |
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19 |
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20 function new_provider(host) |
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21 local provider = { name = "dovecot", request_id = 0 }; |
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22 log("debug", "initializing dovecot authentication provider for host '%s'", host); |
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23 |
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24 local conn; |
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25 -- Generate an id for this connection (must be a 31-bit number, unique per process) |
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26 local pid = tonumber(sha1(host, true):sub(1, 6), 16); |
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27 |
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28 -- Closes the socket |
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29 function provider.close(self) |
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30 if conn then |
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31 conn:close(); |
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32 conn = nil; |
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33 end |
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34 end |
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35 |
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36 -- The following connects to a new socket and send the handshake |
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37 function provider.connect(self) |
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38 -- Destroy old socket |
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39 provider:close(); |
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40 |
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41 conn = socket.unix(); |
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42 |
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43 -- Create a connection to dovecot socket |
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44 log("debug", "connecting to dovecot socket at '%s'", socket_path); |
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45 local ok, err = conn:connect(socket_path); |
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46 if not ok then |
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47 log("error", "error connecting to dovecot socket at '%s'. error was '%s'. check permissions", socket_path, err); |
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48 provider:close(); |
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49 return false; |
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50 end |
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51 |
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52 -- Send our handshake |
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53 log("debug", "sending handshake to dovecot. version 1.1, cpid '%d'", pid); |
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54 if not provider:send("VERSION\t1\t1\n") then |
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55 return false |
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56 end |
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57 if not provider:send("CPID\t" .. pid .. "\n") then |
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58 return false |
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59 end |
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60 |
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61 -- Parse Dovecot's handshake |
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62 local done = false; |
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63 local supported_mechs = {}; |
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64 while (not done) do |
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65 local line = provider:receive(); |
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66 if not line then |
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67 return false; |
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68 end |
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69 |
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70 log("debug", "dovecot handshake: '%s'", line); |
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71 local parts = line:gmatch("[^\t]+"); |
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72 local first = parts(); |
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73 if first == "VERSION" then |
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74 -- Version should be 1.1 |
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75 local major_version = parts(); |
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76 |
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77 if major_version ~= "1" then |
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78 log("error", "dovecot server version is not 1.x. it is %s.x", major_version); |
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79 provider:close(); |
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80 return false; |
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81 end |
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82 elseif first == "MECH" then |
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83 local mech = parts(); |
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84 supported_mechs[mech] = true; |
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85 elseif first == "DONE" then |
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86 -- We need PLAIN |
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87 if not supported_mechs.PLAIN then |
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88 log("warn", "server doesn't support PLAIN mechanism."); |
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89 provider:close(); |
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90 return false; |
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91 end |
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92 done = true; |
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93 end |
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94 end |
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95 return true; |
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96 end |
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97 |
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98 -- Wrapper for send(). Handles errors |
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99 function provider.send(self, data) |
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100 local ok, err = conn:send(data); |
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101 if not ok then |
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102 log("error", "error sending '%s' to dovecot. error was '%s'", data, err); |
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103 provider:close(); |
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104 return false; |
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105 end |
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106 return true; |
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107 end |
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108 |
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109 -- Wrapper for receive(). Handles errors |
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110 function provider.receive(self) |
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111 local line, err = conn:receive(); |
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112 if not line then |
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113 log("error", "error receiving data from dovecot. error was '%s'", err); |
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114 provider:close(); |
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115 return false; |
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116 end |
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117 return line; |
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118 end |
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119 |
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120 function provider.send_auth_request(self, username, password) |
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121 if not conn then |
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122 if not provider:connect() then |
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123 return nil, "Auth failed. Dovecot communications error"; |
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124 end |
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125 end |
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126 |
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127 -- Send auth data |
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128 username = username .. "@" .. module.host; -- FIXME: this is actually a hack for my server |
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129 local b64 = base64.encode(username .. "\0" .. username .. "\0" .. password); |
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130 provider.request_id = provider.request_id + 1 % 4294967296 |
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131 |
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132 local msg = "AUTH\t" .. provider.request_id .. "\tPLAIN\tservice=XMPP\tresp=" .. b64; |
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133 log("debug", "sending auth request for '%s' with password '%s': '%s'", username, password, msg); |
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134 if not provider:send(msg .. "\n") then |
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135 return nil, "Auth failed. Dovecot communications error"; |
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136 end |
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137 |
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138 |
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139 -- Get response |
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140 local line = provider:receive(); |
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141 log("debug", "got auth response: '%s'", line); |
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142 if not line then |
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143 return nil, "Auth failed. Dovecot communications error"; |
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144 end |
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145 local parts = line:gmatch("[^\t]+"); |
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146 |
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147 -- Check response |
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148 local status = parts(); |
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149 local resp_id = tonumber(parts()); |
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150 |
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151 if resp_id ~= provider.request_id then |
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152 log("warn", "dovecot response_id(%s) doesn't match request_id(%s)", resp_id, provider.request_id); |
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153 provider:close(); |
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154 return nil, "Auth failed. Dovecot communications error"; |
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155 end |
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156 |
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157 return status, parts; |
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158 end |
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159 |
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160 function provider.test_password(username, password) |
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161 log("debug", "test password '%s' for user %s at host %s", password, username, module.host); |
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162 |
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163 local status, extra = provider:send_auth_request(username, password); |
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164 |
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165 if status == "OK" then |
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166 log("info", "login ok for '%s'", username); |
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167 return true; |
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168 else |
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169 log("info", "login failed for '%s'", username); |
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170 return nil, "Auth failed. Invalid username or password."; |
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171 end |
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172 end |
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173 |
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174 function provider.get_password(username) |
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175 return nil, "Cannot get_password in dovecot backend."; |
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176 end |
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177 |
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178 function provider.set_password(username, password) |
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179 return nil, "Cannot set_password in dovecot backend."; |
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180 end |
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181 |
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182 function provider.user_exists(username) |
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183 log("debug", "user_exists for user %s at host %s", username, module.host); |
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184 |
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185 -- Send a request. If the response (FAIL) contains an extra |
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186 -- parameter like user=<username> then it exists. |
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187 local status, extra = provider:send_auth_request(username, ""); |
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188 |
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189 local param = extra(); |
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190 while param do |
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191 local parts = param:gmatch("[^=]+"); |
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192 local name = parts(); |
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193 local value = parts(); |
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194 if name == "user" then |
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195 log("debug", "user '%s' exists", username); |
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196 return true; |
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197 end |
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198 |
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199 param = extra(); |
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200 end |
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201 |
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202 log("debug", "user '%s' does not exists (or dovecot didn't send user=<username> parameter)", username); |
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203 return false; |
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204 end |
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205 |
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206 function provider.create_user(username, password) |
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207 return nil, "Cannot create_user in dovecot backend."; |
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208 end |
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209 |
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210 function provider.get_sasl_handler() |
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211 local getpass_authentication_profile = { |
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212 plain_test = function(sasl, username, password, realm) |
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213 local prepped_username = nodeprep(username); |
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214 if not prepped_username then |
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215 log("debug", "NODEprep failed on username: %s", username); |
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216 return "", nil; |
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217 end |
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218 return usermanager.test_password(prepped_username, realm, password), true; |
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219 end |
269
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220 }; |
342
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mod_auth_*: Get rid of undocumented and broken 'sasl_realm' config option.
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221 return new_sasl(module.host, getpass_authentication_profile); |
269
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222 end |
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223 |
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224 return provider; |
261
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Matthew Wild <mwild1@gmail.com>
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225 end |
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226 |
312
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mod_auth_dovecot: Fix various global variable sets/gets, log levels, unclear variable names and change coding style to match more closely the rest of the Prosody code.
Matthew Wild <mwild1@gmail.com>
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227 module:add_item("auth-provider", new_provider(module.host)); |