prosody
2aebd9bf02fc
plugins/mod_tokenauth.lua

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plugins/mod_tokenauth.lua @ 12940:2aebd9bf02fc

util.sasl.oauthbearer: Adjust parsing of GS2 to allow lack of authzid Partly copied from util.sasl.scram and then reduced a bit.
author Kim Alvefur <zash@zash.se>
date Thu, 16 Mar 2023 13:45:49 +0100
parent 12938:055b03d3059b
child 12952:a668bc1aa39d
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1 local id = require "util.id";
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2 local jid = require "util.jid";
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3 local base64 = require "util.encodings".base64;
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4 local usermanager = require "core.usermanager";
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5 local generate_identifier = require "util.id".short;
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6
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7 local token_store = module:open_store("auth_tokens", "map");
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8
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9 local function select_role(username, host, role)
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10 if role then
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11 return prosody.hosts[host].authz.get_role_by_name(role);
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12 end
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13 return usermanager.get_user_role(username, host);
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14 end
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15
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16 function create_jid_token(actor_jid, token_jid, token_role, token_ttl, token_data, token_purpose)
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17 token_jid = jid.prep(token_jid);
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18 if not actor_jid or token_jid ~= actor_jid and not jid.compare(token_jid, actor_jid) then
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19 return nil, "not-authorized";
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20 end
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21
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22 local token_username, token_host, token_resource = jid.split(token_jid);
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23
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24 if token_host ~= module.host then
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25 return nil, "invalid-host";
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26 end
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27
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28 if (token_data and type(token_data) ~= "table") or (token_purpose and type(token_purpose) ~= "string") then
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29 return nil, "bad-request";
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30 end
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31
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32 local token_info = {
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33 owner = actor_jid;
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34 created = os.time();
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35 expires = token_ttl and (os.time() + token_ttl) or nil;
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36 jid = token_jid;
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37 purpose = token_purpose;
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38
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39 resource = token_resource;
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40 role = token_role;
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41 data = token_data;
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42 };
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43
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44 local token_id = id.long();
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45 local token = base64.encode("1;"..jid.join(token_username, token_host)..";"..token_id);
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46 token_store:set(token_username, token_id, token_info);
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47
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48 return token, token_info;
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49 end
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50
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51 local function parse_token(encoded_token)
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52 if not encoded_token then return nil; end
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53 local token = base64.decode(encoded_token);
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54 if not token then return nil; end
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55 local token_jid, token_id = token:match("^1;([^;]+);(.+)$");
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56 if not token_jid then return nil; end
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57 local token_user, token_host = jid.split(token_jid);
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58 return token_id, token_user, token_host;
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59 end
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60
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61 local function _get_parsed_token_info(token_id, token_user, token_host)
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62 if token_host ~= module.host then
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63 return nil, "invalid-host";
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64 end
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65
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66 local token_info, err = token_store:get(token_user, token_id);
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67 if not token_info then
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68 if err then
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69 return nil, "internal-error";
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70 end
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71 return nil, "not-authorized";
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72 end
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73
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74 if token_info.expires and token_info.expires < os.time() then
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75 token_store:set(token_user, token_id, nil);
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76 return nil, "not-authorized";
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77 end
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78
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79 local account_info = usermanager.get_account_info(token_user, module.host);
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80 local password_updated_at = account_info and account_info.password_updated;
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81 if password_updated_at and password_updated_at > token_info.created then
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82 token_store:set(token_user, token_id, nil);
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83 return nil, "not-authorized";
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84 end
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85
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86 return token_info
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87 end
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88
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89 function get_token_info(token)
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90 local token_id, token_user, token_host = parse_token(token);
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91 if not token_id then
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92 return nil, "invalid-token-format";
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93 end
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94 return _get_parsed_token_info(token_id, token_user, token_host);
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95 end
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96
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97 function get_token_session(token, resource)
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98 local token_id, token_user, token_host = parse_token(token);
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99 if not token_id then
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100 return nil, "invalid-token-format";
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101 end
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102
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103 local token_info, err = _get_parsed_token_info(token_id, token_user, token_host);
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104 if not token_info then return nil, err; end
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105
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106 return {
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107 username = token_user;
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108 host = token_host;
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109 resource = token_info.resource or resource or generate_identifier();
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110
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111 role = select_role(token_user, token_host, token_info.role);
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112 };
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113 end
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114
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115
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116 function revoke_token(token)
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117 local token_id, token_user, token_host = parse_token(token);
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118 if not token_id then
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119 return nil, "invalid-token-format";
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120 end
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121 if token_host ~= module.host then
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122 return nil, "invalid-host";
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123 end
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124 return token_store:set(token_user, token_id, nil);
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125 end
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126
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127 function sasl_handler(auth_provider, purpose, extra)
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128 return function (sasl, token, realm, _authzid)
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129 local token_info, err = get_token_info(token);
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130 if not token_info then
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131 module:log("debug", "SASL handler failed to verify token: %s", err);
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132 return nil, nil, extra;
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133 end
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055b03d3059b util.sasl.oauthbearer: Return username from callback instead using authzid (BC)
Kim Alvefur <zash@zash.se>
parents: 12919
diff changeset
134 local token_user, token_host, resource = jid.split(token_info.jid);
055b03d3059b util.sasl.oauthbearer: Return username from callback instead using authzid (BC)
Kim Alvefur <zash@zash.se>
parents: 12919
diff changeset
135 if realm ~= token_host or (purpose and token_info.purpose ~= purpose) then
12915
70f6a8dceb1d mod_tokenauth: Add SASL handler backend that can accept and verify tokens
Matthew Wild <mwild1@gmail.com>
parents: 12914
diff changeset
136 return nil, nil, extra;
70f6a8dceb1d mod_tokenauth: Add SASL handler backend that can accept and verify tokens
Matthew Wild <mwild1@gmail.com>
parents: 12914
diff changeset
137 end
12938
055b03d3059b util.sasl.oauthbearer: Return username from callback instead using authzid (BC)
Kim Alvefur <zash@zash.se>
parents: 12919
diff changeset
138 if auth_provider.is_enabled and not auth_provider.is_enabled(token_user) then
12915
70f6a8dceb1d mod_tokenauth: Add SASL handler backend that can accept and verify tokens
Matthew Wild <mwild1@gmail.com>
parents: 12914
diff changeset
139 return true, false, token_info;
70f6a8dceb1d mod_tokenauth: Add SASL handler backend that can accept and verify tokens
Matthew Wild <mwild1@gmail.com>
parents: 12914
diff changeset
140 end
12938
055b03d3059b util.sasl.oauthbearer: Return username from callback instead using authzid (BC)
Kim Alvefur <zash@zash.se>
parents: 12919
diff changeset
141 sasl.resource = resource;
055b03d3059b util.sasl.oauthbearer: Return username from callback instead using authzid (BC)
Kim Alvefur <zash@zash.se>
parents: 12919
diff changeset
142 sasl.token_info = token_info;
055b03d3059b util.sasl.oauthbearer: Return username from callback instead using authzid (BC)
Kim Alvefur <zash@zash.se>
parents: 12919
diff changeset
143 return token_user, true, token_info;
12915
70f6a8dceb1d mod_tokenauth: Add SASL handler backend that can accept and verify tokens
Matthew Wild <mwild1@gmail.com>
parents: 12914
diff changeset
144 end;
70f6a8dceb1d mod_tokenauth: Add SASL handler backend that can accept and verify tokens
Matthew Wild <mwild1@gmail.com>
parents: 12914
diff changeset
145 end