Mercurial > prosody-modules
annotate mod_lib_ldap/ldap.lib.lua @ 1165:b8762c9fb270
mod_auth_pam: Initial commit of simple PAM authentication module
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Thu, 15 Aug 2013 18:38:02 +0200 |
| parents | cd2262969d2e |
| children | 66b3085ecc49 |
| rev | line source |
|---|---|
| 809 | 1 -- vim:sts=4 sw=4 |
| 2 | |
| 3 -- Prosody IM | |
| 4 -- Copyright (C) 2008-2010 Matthew Wild | |
| 5 -- Copyright (C) 2008-2010 Waqas Hussain | |
| 6 -- Copyright (C) 2012 Rob Hoelz | |
| 7 -- | |
| 8 -- This project is MIT/X11 licensed. Please see the | |
| 9 -- COPYING file in the source package for more information. | |
| 10 -- | |
| 11 | |
| 12 local ldap; | |
| 13 local connection; | |
| 14 local params = module:get_option("ldap"); | |
| 15 local format = string.format; | |
| 16 local tconcat = table.concat; | |
| 17 | |
| 18 local _M = {}; | |
| 19 | |
| 20 local config_params = { | |
| 21 hostname = 'string', | |
| 22 user = { | |
| 23 basedn = 'string', | |
| 24 namefield = 'string', | |
| 25 filter = 'string', | |
| 26 usernamefield = 'string', | |
| 27 }, | |
| 28 groups = { | |
| 29 basedn = 'string', | |
| 30 namefield = 'string', | |
| 31 memberfield = 'string', | |
| 32 | |
| 33 _member = { | |
| 34 name = 'string', | |
| 35 admin = 'boolean?', | |
| 36 }, | |
| 37 }, | |
| 38 admin = { | |
| 39 _optional = true, | |
| 40 basedn = 'string', | |
| 41 namefield = 'string', | |
| 42 filter = 'string', | |
| 43 } | |
| 44 } | |
| 45 | |
| 46 local function run_validation(params, config, prefix) | |
| 47 prefix = prefix or ''; | |
| 48 | |
| 49 -- verify that every required member of config is present in params | |
| 50 for k, v in pairs(config) do | |
| 51 if type(k) == 'string' and k:sub(1, 1) ~= '_' then | |
| 52 local is_optional; | |
| 53 if type(v) == 'table' then | |
| 54 is_optional = v._optional; | |
| 55 else | |
| 56 is_optional = v:sub(-1) == '?'; | |
| 57 end | |
| 58 | |
| 59 if not is_optional and params[k] == nil then | |
| 60 return nil, prefix .. k .. ' is required'; | |
| 61 end | |
| 62 end | |
| 63 end | |
| 64 | |
| 65 for k, v in pairs(params) do | |
| 66 local expected_type = config[k]; | |
| 67 | |
| 68 local ok, err = true; | |
| 69 | |
| 70 if type(k) == 'string' then | |
| 71 -- verify that this key is present in config | |
| 72 if k:sub(1, 1) == '_' or expected_type == nil then | |
| 73 return nil, 'invalid parameter ' .. prefix .. k; | |
| 74 end | |
| 75 | |
| 76 -- type validation | |
| 77 if type(expected_type) == 'string' then | |
| 78 if expected_type:sub(-1) == '?' then | |
| 79 expected_type = expected_type:sub(1, -2); | |
| 80 end | |
| 81 | |
| 82 if type(v) ~= expected_type then | |
| 83 return nil, 'invalid type for parameter ' .. prefix .. k; | |
| 84 end | |
| 85 else -- it's a table (or had better be) | |
| 86 if type(v) ~= 'table' then | |
| 87 return nil, 'invalid type for parameter ' .. prefix .. k; | |
| 88 end | |
| 89 | |
| 90 -- recurse into child | |
| 91 ok, err = run_validation(v, expected_type, prefix .. k .. '.'); | |
| 92 end | |
| 93 else -- it's an integer (or had better be) | |
| 94 if not config._member then | |
| 95 return nil, 'invalid parameter ' .. prefix .. tostring(k); | |
| 96 end | |
| 97 ok, err = run_validation(v, config._member, prefix .. tostring(k) .. '.'); | |
| 98 end | |
| 99 | |
| 100 if not ok then | |
| 101 return ok, err; | |
| 102 end | |
| 103 end | |
| 104 | |
| 105 return true; | |
| 106 end | |
| 107 | |
| 108 local function validate_config() | |
| 109 if true then | |
| 110 return true; -- XXX for now | |
| 111 end | |
| 112 | |
| 113 -- this is almost too clever (I mean that in a bad | |
| 114 -- maintainability sort of way) | |
| 115 -- | |
| 116 -- basically this allows a free pass for a key in group members | |
| 117 -- equal to params.groups.namefield | |
| 118 setmetatable(config_params.groups._member, { | |
| 119 __index = function(_, k) | |
| 120 if k == params.groups.namefield then | |
| 121 return 'string'; | |
| 122 end | |
| 123 end | |
| 124 }); | |
| 125 | |
| 126 local ok, err = run_validation(params, config_params); | |
| 127 | |
| 128 setmetatable(config_params.groups._member, nil); | |
| 129 | |
| 130 if ok then | |
| 131 -- a little extra validation that doesn't fit into | |
| 132 -- my recursive checker | |
| 133 local group_namefield = params.groups.namefield; | |
| 134 for i, group in ipairs(params.groups) do | |
| 135 if not group[group_namefield] then | |
| 136 return nil, format('groups.%d.%s is required', i, group_namefield); | |
| 137 end | |
| 138 end | |
| 139 | |
| 140 -- fill in params.admin if you can | |
| 141 if not params.admin and params.groups then | |
| 142 local admingroup; | |
| 143 | |
| 144 for _, groupconfig in ipairs(params.groups) do | |
| 145 if groupconfig.admin then | |
| 146 admingroup = groupconfig; | |
| 147 break; | |
| 148 end | |
| 149 end | |
| 150 | |
| 151 if admingroup then | |
| 152 params.admin = { | |
| 153 basedn = params.groups.basedn, | |
| 154 namefield = params.groups.memberfield, | |
| 155 filter = group_namefield .. '=' .. admingroup[group_namefield], | |
| 156 }; | |
| 157 end | |
| 158 end | |
| 159 end | |
| 160 | |
| 161 return ok, err; | |
| 162 end | |
| 163 | |
| 164 -- what to do if connection isn't available? | |
| 165 local function connect() | |
| 166 return ldap.open_simple(params.hostname, params.bind_dn, params.bind_password, params.use_tls); | |
| 167 end | |
| 168 | |
| 169 -- this is abstracted so we can maintain persistent connections at a later time | |
| 170 function _M.getconnection() | |
| 171 return connect(); | |
| 172 end | |
| 173 | |
| 174 function _M.getparams() | |
| 175 return params; | |
| 176 end | |
| 177 | |
| 178 -- XXX consider renaming this...it doesn't bind the current connection | |
| 179 function _M.bind(username, password) | |
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180 local conn = _M.getconnection(); |
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parents:
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181 local filter = format('%s=%s', params.user.usernamefield, username); |
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182 |
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183 if filter then |
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184 filter = _M.filter.combine_and(filter, params.user.filter); |
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185 end |
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186 |
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187 local who = _M.singlematch { |
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188 attrs = params.user.usernamefield, |
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189 base = params.user.basedn, |
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190 filter = filter, |
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191 }; |
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192 |
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193 if who then |
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194 who = who.dn; |
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195 module:log('debug', '_M.bind - who: %s', who); |
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196 else |
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197 module:log('debug', '_M.bind - no DN found for username = %s', username); |
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198 return nil, format('no DN found for username = %s', username); |
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199 end |
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parents:
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200 |
| 809 | 201 local conn, err = ldap.open_simple(params.hostname, who, password, params.use_tls); |
| 202 | |
| 203 if conn then | |
| 204 conn:close(); | |
| 205 return true; | |
| 206 end | |
| 207 | |
| 208 return conn, err; | |
| 209 end | |
| 210 | |
| 211 function _M.singlematch(query) | |
| 212 local ld = _M.getconnection(); | |
| 213 | |
| 214 query.sizelimit = 1; | |
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215 query.scope = 'subtree'; |
| 809 | 216 |
| 217 for dn, attribs in ld:search(query) do | |
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218 attribs.dn = dn; |
| 809 | 219 return attribs; |
| 220 end | |
| 221 end | |
| 222 | |
| 223 _M.filter = {}; | |
| 224 | |
| 225 function _M.filter.combine_and(...) | |
| 226 local parts = { '(&' }; | |
| 227 | |
| 228 local arg = { ... }; | |
| 229 | |
| 230 for _, filter in ipairs(arg) do | |
| 231 if filter:sub(1, 1) ~= '(' and filter:sub(-1) ~= ')' then | |
| 232 filter = '(' .. filter .. ')' | |
| 233 end | |
| 234 parts[#parts + 1] = filter; | |
| 235 end | |
| 236 | |
| 237 parts[#parts + 1] = ')'; | |
| 238 | |
| 239 return tconcat(parts, ''); | |
| 240 end | |
| 241 | |
| 242 do | |
| 243 local ok, err; | |
| 244 | |
| 245 prosody.unlock_globals(); | |
| 246 ok, ldap = pcall(require, 'lualdap'); | |
| 247 prosody.lock_globals(); | |
| 248 if not ok then | |
| 249 module:log("error", "Failed to load the LuaLDAP library for accessing LDAP: %s", ldap); | |
| 250 module:log("error", "More information on install LuaLDAP can be found at http://www.keplerproject.org/lualdap"); | |
| 251 return; | |
| 252 end | |
| 253 | |
| 254 if not params then | |
| 255 module:log("error", "LDAP configuration required to use the LDAP storage module"); | |
| 256 return; | |
| 257 end | |
| 258 | |
| 259 ok, err = validate_config(); | |
| 260 | |
| 261 if not ok then | |
| 262 module:log("error", "LDAP configuration is invalid: %s", tostring(err)); | |
| 263 return; | |
| 264 end | |
| 265 end | |
| 266 | |
| 267 return _M; |