prosody
8abadb7c03b6
plugins/mod_auth_internal_hashed.lua

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plugins/mod_auth_internal_hashed.lua @ 3860:8abadb7c03b6

prosody: Added a comment, to match prosodyctl.
author Waqas Hussain <waqas20@gmail.com>
date Sun, 12 Dec 2010 17:15:57 +0500
parent 3454:8cf30367aa4f
child 3981:2b0b8fe68df2
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 -- Copyright (C) 2010 Jeff Mitchell
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5 --
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6 -- This project is MIT/X11 licensed. Please see the
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7 -- COPYING file in the source package for more information.
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8 --
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9
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10 local datamanager = require "util.datamanager";
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11 local log = require "util.logger".init("auth_internal_hashed");
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12 local type = type;
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13 local error = error;
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14 local ipairs = ipairs;
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15 local hashes = require "util.hashes";
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16 local jid_bare = require "util.jid".bare;
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17 local getAuthenticationDatabaseSHA1 = require "util.sasl.scram".getAuthenticationDatabaseSHA1;
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18 local config = require "core.configmanager";
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19 local usermanager = require "core.usermanager";
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20 local generate_uuid = require "util.uuid".generate;
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21 local new_sasl = require "util.sasl".new;
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22 local nodeprep = require "util.encodings".stringprep.nodeprep;
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23 local hosts = hosts;
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24
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25 -- COMPAT w/old trunk: remove these two lines before 0.8 release
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26 local hmac_sha1 = require "util.hmac".sha1;
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27 local sha1 = require "util.hashes".sha1;
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28
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29 local to_hex;
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30 do
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31 local function replace_byte_with_hex(byte)
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32 return ("%02x"):format(byte:byte());
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33 end
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34 function to_hex(binary_string)
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35 return binary_string:gsub(".", replace_byte_with_hex);
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36 end
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37 end
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38
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39 local from_hex;
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40 do
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41 local function replace_hex_with_byte(hex)
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42 return string.char(tonumber(hex, 16));
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43 end
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44 function from_hex(hex_string)
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45 return hex_string:gsub("..", replace_hex_with_byte);
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46 end
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47 end
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48
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49
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50 local prosody = _G.prosody;
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51
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52 -- Default; can be set per-user
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53 local iteration_count = 4096;
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54
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55 function new_hashpass_provider(host)
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56 local provider = { name = "internal_hashed" };
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57 log("debug", "initializing hashpass authentication provider for host '%s'", host);
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58
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59 function provider.test_password(username, password)
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60 local credentials = datamanager.load(username, host, "accounts") or {};
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61
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62 if credentials.password ~= nil and string.len(credentials.password) ~= 0 then
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63 if credentials.password ~= password then
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64 return nil, "Auth failed. Provided password is incorrect.";
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65 end
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66
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67 if provider.set_password(username, credentials.password) == nil then
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68 return nil, "Auth failed. Could not set hashed password from plaintext.";
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69 else
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70 return true;
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71 end
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72 end
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73
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74 if credentials.iteration_count == nil or credentials.salt == nil or string.len(credentials.salt) == 0 then
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75 return nil, "Auth failed. Stored salt and iteration count information is not complete.";
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76 end
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77
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78 -- convert hexpass to stored_key and server_key
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79 -- COMPAT w/old trunk: remove before 0.8 release
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80 if credentials.hashpass then
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81 local salted_password = from_hex(credentials.hashpass);
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82 credentials.stored_key = sha1(hmac_sha1(salted_password, "Client Key"), true);
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83 credentials.server_key = to_hex(hmac_sha1(salted_password, "Server Key"));
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84 credentials.hashpass = nil
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85 datamanager.store(username, host, "accounts", credentials);
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86 end
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87
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88 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, credentials.salt, credentials.iteration_count);
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89
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90 local stored_key_hex = to_hex(stored_key);
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91 local server_key_hex = to_hex(server_key);
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92
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93 if valid and stored_key_hex == credentials.stored_key and server_key_hex == credentials.server_key then
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94 return true;
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95 else
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96 return nil, "Auth failed. Invalid username, password, or password hash information.";
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97 end
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98 end
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99
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100 function provider.set_password(username, password)
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101 local account = datamanager.load(username, host, "accounts");
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102 if account then
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103 account.salt = account.salt or generate_uuid();
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104 account.iteration_count = account.iteration_count or iteration_count;
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105 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, account.salt, account.iteration_count);
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106 local stored_key_hex = to_hex(stored_key);
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107 local server_key_hex = to_hex(server_key);
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108
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109 account.stored_key = stored_key_hex
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110 account.server_key = server_key_hex
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111
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112 account.password = nil;
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113 return datamanager.store(username, host, "accounts", account);
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114 end
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115 return nil, "Account not available.";
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116 end
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117
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118 function provider.user_exists(username)
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119 local account = datamanager.load(username, host, "accounts");
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120 if not account then
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121 log("debug", "account not found for username '%s' at host '%s'", username, module.host);
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122 return nil, "Auth failed. Invalid username";
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123 end
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124 return true;
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125 end
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126
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127 function provider.create_user(username, password)
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128 if password == nil then
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129 return datamanager.store(username, host, "accounts", {});
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130 end
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131 local salt = generate_uuid();
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132 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, salt, iteration_count);
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133 local stored_key_hex = to_hex(stored_key);
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134 local server_key_hex = to_hex(server_key);
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135 return datamanager.store(username, host, "accounts", {stored_key = stored_key_hex, server_key = server_key_hex, salt = salt, iteration_count = iteration_count});
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136 end
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137
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138 function provider.get_sasl_handler()
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139 local realm = module:get_option("sasl_realm") or module.host;
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140 local testpass_authentication_profile = {
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141 plain_test = function(username, password, realm)
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142 local prepped_username = nodeprep(username);
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143 if not prepped_username then
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144 log("debug", "NODEprep failed on username: %s", username);
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145 return "", nil;
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146 end
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147 return usermanager.test_password(prepped_username, realm, password), true;
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148 end,
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149 scram_sha_1 = function(username, realm)
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150 local credentials = datamanager.load(username, host, "accounts");
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151 if not credentials then return; end
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152 if credentials.password then
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153 usermanager.set_password(username, credentials.password, host);
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154 credentials = datamanager.load(username, host, "accounts");
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155 if not credentials then return; end
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156 end
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157
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158 -- convert hexpass to stored_key and server_key
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159 -- COMPAT w/old trunk: remove before 0.8 release
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160 if credentials.hashpass then
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161 local salted_password = from_hex(credentials.hashpass);
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162 credentials.stored_key = sha1(hmac_sha1(salted_password, "Client Key"), true);
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163 credentials.server_key = to_hex(hmac_sha1(salted_password, "Server Key"));
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164 credentials.hashpass = nil
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165 datamanager.store(username, host, "accounts", credentials);
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166 end
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167
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168 local stored_key, server_key, iteration_count, salt = credentials.stored_key, credentials.server_key, credentials.iteration_count, credentials.salt;
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169 stored_key = stored_key and from_hex(stored_key);
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170 server_key = server_key and from_hex(server_key);
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171 return stored_key, server_key, iteration_count, salt, true;
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172 end
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173 };
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174 return new_sasl(realm, testpass_authentication_profile);
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175 end
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176
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177 return provider;
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178 end
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179
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180 module:add_item("auth-provider", new_hashpass_provider(module.host));
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181