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mod_http_oauth2/mod_http_oauth2.lua @ 4569:9cbdb60e21f2
mod_muc_bot: Add Compatibility section to README
author | Kim Alvefur <zash@zash.se> |
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date | Mon, 24 May 2021 16:36:35 +0200 |
parent | 4370:dee6b5098278 |
child | 4669:d3434fd151b5 |
rev | line source |
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1 local hashes = require "util.hashes"; |
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2 local cache = require "util.cache"; |
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3 local http = require "util.http"; |
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4 local jid = require "util.jid"; |
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5 local json = require "util.json"; |
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6 local usermanager = require "core.usermanager"; |
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7 local errors = require "util.error"; |
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8 local url = require "socket.url"; |
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9 local uuid = require "util.uuid"; |
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10 local encodings = require "util.encodings"; |
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11 local base64 = encodings.base64; |
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12 |
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13 local tokens = module:depends("tokenauth"); |
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14 |
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15 local clients = module:open_store("oauth2_clients", "map"); |
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16 |
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17 local function filter_scopes(request_jid, requested_scope_string) --luacheck: ignore 212/requested_scope_string |
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18 -- We currently don't really support scopes, so override |
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19 -- to whatever real permissions the user has |
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20 if usermanager.is_admin(request_jid, module.host) then |
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21 return "prosody:scope:admin"; |
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22 end |
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23 return "prosody:scope:default"; |
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24 end |
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25 |
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26 local function code_expired(code) |
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27 return os.difftime(os.time(), code.issued) > 120; |
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28 end |
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29 |
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30 local codes = cache.new(10000, function (_, code) |
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31 return code_expired(code) |
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32 end); |
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33 |
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34 module:add_timer(900, function() |
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35 local k, code = codes:tail(); |
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36 while code and code_expired(code) do |
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37 codes:set(k, nil); |
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38 k, code = codes:tail(); |
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39 end |
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40 return 900; |
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41 end) |
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42 |
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43 local function oauth_error(err_name, err_desc) |
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44 return errors.new({ |
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45 type = "modify"; |
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46 condition = "bad-request"; |
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47 code = err_name == "invalid_client" and 401 or 400; |
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48 text = err_desc and (err_name..": "..err_desc) or err_name; |
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49 extra = { oauth2_response = { error = err_name, error_description = err_desc } }; |
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50 }); |
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51 end |
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52 |
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53 local function new_access_token(token_jid, scope, ttl) |
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54 local token = tokens.create_jid_token(token_jid, token_jid, scope, ttl); |
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55 return { |
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56 token_type = "bearer"; |
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57 access_token = token; |
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58 expires_in = ttl; |
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59 scope = scope; |
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60 -- TODO: include refresh_token when implemented |
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61 }; |
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62 end |
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63 |
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64 local grant_type_handlers = {}; |
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65 local response_type_handlers = {}; |
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66 |
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67 function grant_type_handlers.password(params) |
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68 local request_jid = assert(params.username, oauth_error("invalid_request", "missing 'username' (JID)")); |
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69 local request_password = assert(params.password, oauth_error("invalid_request", "missing 'password'")); |
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70 local request_username, request_host, request_resource = jid.prepped_split(request_jid); |
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71 |
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72 if not (request_username and request_host) or request_host ~= module.host then |
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73 return oauth_error("invalid_request", "invalid JID"); |
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74 end |
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75 if not usermanager.test_password(request_username, request_host, request_password) then |
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76 return oauth_error("invalid_grant", "incorrect credentials"); |
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77 end |
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78 |
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79 local granted_jid = jid.join(request_username, request_host, request_resource); |
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80 local granted_scopes = filter_scopes(granted_jid, params.scope); |
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81 return json.encode(new_access_token(granted_jid, granted_scopes, nil)); |
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82 end |
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83 |
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84 function response_type_handlers.code(params, granted_jid) |
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85 if not params.client_id then return oauth_error("invalid_request", "missing 'client_id'"); end |
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86 if not params.redirect_uri then return oauth_error("invalid_request", "missing 'redirect_uri'"); end |
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87 |
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88 local client_owner, client_host, client_id = jid.prepped_split(params.client_id); |
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89 if client_host ~= module.host then |
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90 return oauth_error("invalid_client", "incorrect credentials"); |
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91 end |
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92 local client, err = clients:get(client_owner, client_id); |
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93 if err then error(err); end |
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94 if not client then |
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95 return oauth_error("invalid_client", "incorrect credentials"); |
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96 end |
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97 |
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98 local granted_scopes = filter_scopes(granted_jid, params.scope); |
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99 |
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100 local code = uuid.generate(); |
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101 assert(codes:set(params.client_id .. "#" .. code, { |
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102 issued = os.time(); |
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103 granted_jid = granted_jid; |
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104 granted_scopes = granted_scopes; |
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105 })); |
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106 |
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107 local redirect = url.parse(params.redirect_uri); |
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108 local query = http.formdecode(redirect.query or ""); |
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109 if type(query) ~= "table" then query = {}; end |
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110 table.insert(query, { name = "code", value = code }) |
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111 if params.state then |
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112 table.insert(query, { name = "state", value = params.state }); |
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113 end |
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114 redirect.query = http.formencode(query); |
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115 |
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116 return { |
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117 status_code = 302; |
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118 headers = { |
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119 location = url.build(redirect); |
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120 }; |
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121 } |
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122 end |
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123 |
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124 local pepper = module:get_option_string("oauth2_client_pepper", ""); |
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125 |
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126 local function verify_secret(stored, salt, i, secret) |
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127 return base64.decode(stored) == hashes.pbkdf2_hmac_sha256(secret, salt .. pepper, i); |
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128 end |
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129 |
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130 function grant_type_handlers.authorization_code(params) |
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131 if not params.client_id then return oauth_error("invalid_request", "missing 'client_id'"); end |
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132 if not params.client_secret then return oauth_error("invalid_request", "missing 'client_secret'"); end |
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133 if not params.code then return oauth_error("invalid_request", "missing 'code'"); end |
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134 if params.scope and params.scope ~= "" then |
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135 return oauth_error("invalid_scope", "unknown scope requested"); |
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136 end |
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137 |
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138 local client_owner, client_host, client_id = jid.prepped_split(params.client_id); |
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139 if client_host ~= module.host then |
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140 module:log("debug", "%q ~= %q", client_host, module.host); |
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141 return oauth_error("invalid_client", "incorrect credentials"); |
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142 end |
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143 local client, err = clients:get(client_owner, client_id); |
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144 if err then error(err); end |
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145 if not client or not verify_secret(client.secret_hash, client.salt, client.iteration_count, params.client_secret) then |
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146 module:log("debug", "client_secret mismatch"); |
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147 return oauth_error("invalid_client", "incorrect credentials"); |
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148 end |
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149 local code, err = codes:get(params.client_id .. "#" .. params.code); |
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150 if err then error(err); end |
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151 if not code or type(code) ~= "table" or code_expired(code) then |
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152 module:log("debug", "authorization_code invalid or expired: %q", code); |
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153 return oauth_error("invalid_client", "incorrect credentials"); |
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154 end |
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155 assert(codes:set(client_owner, client_id .. "#" .. params.code, nil)); |
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156 |
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157 return json.encode(new_access_token(code.granted_jid, code.granted_scopes, nil)); |
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158 end |
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159 |
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160 local function check_credentials(request, allow_token) |
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161 local auth_type, auth_data = string.match(request.headers.authorization, "^(%S+)%s(.+)$"); |
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162 |
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163 if auth_type == "Basic" then |
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164 local creds = base64.decode(auth_data); |
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165 if not creds then return false; end |
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166 local username, password = string.match(creds, "^([^:]+):(.*)$"); |
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167 if not username then return false; end |
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168 username, password = encodings.stringprep.nodeprep(username), encodings.stringprep.saslprep(password); |
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169 if not username then return false; end |
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170 if not usermanager.test_password(username, module.host, password) then |
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171 return false; |
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172 end |
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173 return username; |
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174 elseif auth_type == "Bearer" and allow_token then |
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175 local token_info = tokens.get_token_info(auth_data); |
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176 if not token_info or not token_info.session or token_info.session.host ~= module.host then |
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177 return false; |
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178 end |
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179 return token_info.session.username; |
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180 end |
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181 return nil; |
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182 end |
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183 |
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184 if module:get_host_type() == "component" then |
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185 local component_secret = assert(module:get_option_string("component_secret"), "'component_secret' is a required setting when loaded on a Component"); |
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186 |
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187 function grant_type_handlers.password(params) |
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188 local request_jid = assert(params.username, oauth_error("invalid_request", "missing 'username' (JID)")); |
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189 local request_password = assert(params.password, oauth_error("invalid_request", "missing 'password'")); |
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190 local request_username, request_host, request_resource = jid.prepped_split(request_jid); |
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191 if params.scope then |
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192 return oauth_error("invalid_scope", "unknown scope requested"); |
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193 end |
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194 if not request_host or request_host ~= module.host then |
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195 return oauth_error("invalid_request", "invalid JID"); |
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196 end |
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197 if request_password == component_secret then |
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198 local granted_jid = jid.join(request_username, request_host, request_resource); |
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199 return json.encode(new_access_token(granted_jid, nil, nil)); |
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200 end |
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201 return oauth_error("invalid_grant", "incorrect credentials"); |
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202 end |
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203 |
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204 -- TODO How would this make sense with components? |
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205 -- Have an admin authenticate maybe? |
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206 response_type_handlers.code = nil; |
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207 grant_type_handlers.authorization_code = nil; |
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208 check_credentials = function () return false end |
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209 end |
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210 |
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changeset
|
211 function handle_token_grant(event) |
3934
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212 event.response.headers.content_type = "application/json"; |
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|
213 local params = http.formdecode(event.request.body); |
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214 if not params then |
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215 return oauth_error("invalid_request"); |
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216 end |
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217 local grant_type = params.grant_type |
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218 local grant_handler = grant_type_handlers[grant_type]; |
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219 if not grant_handler then |
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220 return oauth_error("unsupported_grant_type"); |
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221 end |
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222 return grant_handler(params); |
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223 end |
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224 |
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225 local function handle_authorization_request(event) |
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226 local request, response = event.request, event.response; |
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227 if not request.headers.authorization then |
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228 response.headers.www_authenticate = string.format("Basic realm=%q", module.host.."/"..module.name); |
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229 return 401; |
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230 end |
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231 local user = check_credentials(request); |
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232 if not user then |
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233 return 401; |
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234 end |
4265 | 235 -- TODO ask user for consent here |
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236 if not request.url.query then |
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237 response.headers.content_type = "application/json"; |
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238 return oauth_error("invalid_request"); |
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239 end |
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240 local params = http.formdecode(request.url.query); |
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241 if not params then |
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242 return oauth_error("invalid_request"); |
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243 end |
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244 local response_type = params.response_type; |
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245 local response_handler = response_type_handlers[response_type]; |
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246 if not response_handler then |
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247 response.headers.content_type = "application/json"; |
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248 return oauth_error("unsupported_response_type"); |
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249 end |
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250 return response_handler(params, jid.join(user, module.host)); |
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251 end |
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252 |
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253 local function handle_revocation_request(event) |
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254 local request, response = event.request, event.response; |
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255 if not request.headers.authorization then |
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256 response.headers.www_authenticate = string.format("Basic realm=%q", module.host.."/"..module.name); |
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257 return 401; |
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258 elseif request.headers.content_type ~= "application/x-www-form-urlencoded" |
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259 or not request.body or request.body == "" then |
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260 return 400; |
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261 end |
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262 local user = check_credentials(request, true); |
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263 if not user then |
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264 return 401; |
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265 end |
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266 |
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267 local form_data = http.formdecode(event.request.body); |
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268 if not form_data or not form_data.token then |
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269 return 400; |
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270 end |
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271 local ok, err = tokens.revoke_token(form_data.token); |
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272 if not ok then |
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273 module:log("warn", "Unable to revoke token: %s", tostring(err)); |
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274 return 500; |
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275 end |
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276 return 200; |
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277 end |
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278 |
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279 module:depends("http"); |
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280 module:provides("http", { |
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281 route = { |
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282 ["POST /token"] = handle_token_grant; |
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283 ["GET /authorize"] = handle_authorization_request; |
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284 ["POST /revoke"] = handle_revocation_request; |
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285 }; |
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286 }); |
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287 |
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288 local http_server = require "net.http.server"; |
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289 |
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290 module:hook_object_event(http_server, "http-error", function (event) |
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291 local oauth2_response = event.error and event.error.extra and event.error.extra.oauth2_response; |
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292 if not oauth2_response then |
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293 return; |
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294 end |
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295 event.response.headers.content_type = "application/json"; |
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296 event.response.status_code = event.error.code or 400; |
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297 return json.encode(oauth2_response); |
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298 end, 5); |