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1342
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1 local dm_load = require "util.datamanager".load;
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2 local st = require "util.stanza";
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3 local nodeprep = require "util.encodings".stringprep.nodeprep;
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4 local usermanager = require "core.usermanager";
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5 local http = require "net.http";
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6 local vcard = module:require "vcard";
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7 local datetime = require "util.datetime";
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8 local timer = require "util.timer";
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9 local jidutil = require "util.jid";
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10
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11 -- SMTP related params. Readed from config
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12 local os_time = os.time;
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13 local smtp = require "socket.smtp";
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14 local smtp_server = module:get_option_string("smtp_server", "localhost");
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15 local smtp_port = module:get_option_string("smtp_port", "25");
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16 local smtp_ssl = module:get_option_boolean("smtp_ssl", false);
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17 local smtp_user = module:get_option_string("smtp_username");
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18 local smtp_pass = module:get_option_string("smtp_password");
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19 local smtp_address = module:get_option("smtp_from") or ((smtp_user or "no-responder").."@"..(smtp_server or module.host));
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20 local mail_subject = module:get_option_string("msg_subject")
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21 local mail_body = module:get_option_string("msg_body");
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22 local url_path = module:get_option_string("url_path", "/resetpass");
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23
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24
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25 -- This table has the tokens submited by the server
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26 tokens_mails = {};
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27 tokens_expiration = {};
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28
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29 -- URL
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30 local https_host = module:get_option_string("https_host");
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31 local http_host = module:get_option_string("http_host");
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32 local https_port = module:get_option("https_ports", { 443 });
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33 local http_port = module:get_option("http_ports", { 80 });
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34
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35 local timer_repeat = 120; -- repeat after 120 secs
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36
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37 function enablessl()
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38 local sock = socket.tcp()
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39 return setmetatable({
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40 connect = function(_, host, port)
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41 local r, e = sock:connect(host, port)
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42 if not r then return r, e end
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43 sock = ssl.wrap(sock, {mode='client', protocol='tlsv1'})
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44 return sock:dohandshake()
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45 end
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46 }, {
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47 __index = function(t,n)
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48 return function(_, ...)
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49 return sock[n](sock, ...)
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50 end
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51 end
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52 })
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53 end
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54
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55 function template(data)
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56 -- Like util.template, but deals with plain text
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57 return { apply = function(values) return (data:gsub("{([^}]+)}", values)); end }
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58 end
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59
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60 local function get_template(name, extension)
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61 local fh = assert(module:load_resource("templates/"..name..extension));
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62 local data = assert(fh:read("*a"));
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63 fh:close();
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64 return template(data);
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65 end
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66
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67 local function render(template, data)
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68 return tostring(template.apply(data));
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69 end
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70
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71 function send_email(address, smtp_address, message_text, subject)
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72 local rcpt = "<"..address..">";
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73
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74 local mesgt = {
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75 headers = {
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76 to = address;
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77 subject = subject or ("Jabber password reset "..jid_bare(from_address));
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78 };
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79 body = message_text;
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80 };
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81 local ok, err = nil;
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82
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83 if not smtp_ssl then
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84 ok, err = smtp.send{ from = smtp_address, rcpt = rcpt, source = smtp.message(mesgt),
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85 server = smtp_server, user = smtp_user, password = smtp_pass, port = 25 };
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86 else
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87 ok, err = smtp.send{ from = smtp_address, rcpt = rcpt, source = smtp.message(mesgt),
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88 server = smtp_server, user = smtp_user, password = smtp_pass, port = smtp_port, create = enablessl };
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89 end
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90
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91 if not ok then
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92 module:log("error", "Failed to deliver to %s: %s", tostring(address), tostring(err));
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93 return;
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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 local vCard_mt = {
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99 __index = function(t, k)
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100 if type(k) ~= "string" then return nil end
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101 for i=1,#t do
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102 local t_i = rawget(t, i);
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103 if t_i and t_i.name == k then
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104 rawset(t, k, t_i);
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105 return t_i;
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106 end
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107 end
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108 end
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109 };
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110
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111 local function get_user_vcard(user, host)
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112 local vCard = dm_load(user, host or base_host, "vcard");
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113 if vCard then
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114 vCard = st.deserialize(vCard);
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115 vCard = vcard.from_xep54(vCard);
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116 return setmetatable(vCard, vCard_mt);
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117 end
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118 end
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119
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120 local changepass_tpl = get_template("changepass",".html");
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121 local sendmail_success_tpl = get_template("sendmailok",".html");
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122 local reset_success_tpl = get_template("resetok",".html");
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123 local token_tpl = get_template("token",".html");
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124
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125 function generate_page(event, display_options)
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126 local request = event.request;
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127
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128 return render(changepass_tpl, {
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129 path = request.path; hostname = module.host;
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130 notice = display_options and display_options.register_error or "";
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131 })
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132 end
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133
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134 function generate_token_page(event, display_options)
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135 local request = event.request;
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136
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137 return render(token_tpl, {
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138 path = request.path; hostname = module.host;
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139 token = request.url.query;
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140 notice = display_options and display_options.register_error or "";
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141 })
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142 end
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143
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144 function generateToken(address)
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145 math.randomseed(os.time())
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146 length = 16
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147 if length < 1 then return nil end
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148 local array = {}
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149 for i = 1, length, 2 do
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150 array[i] = string.char(math.random(48,57))
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151 array[i+1] = string.char(math.random(97,122))
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152 end
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153 local token = table.concat(array);
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154 if not tokens_mails[token] then
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155
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156 tokens_mails[token] = address;
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157 tokens_expiration[token] = os.time();
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158 return token
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159 else
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160 module:log("error", "Reset password token collision: '%s'", token);
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161 return generateToken(address)
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162 end
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163 end
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164
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165 function isExpired(token)
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166 if not tokens_expiration[token] then
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167 return nil;
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168 end
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169 if os.difftime(os.time(), tokens_expiration[token]) < 86400 then -- 86400 secs == 24h
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170 -- token is valid yet
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171 return nil;
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172 else
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173 -- token invalid, we can create a fresh one.
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174 return true;
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175 end
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176 end
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177
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178 -- Expire tokens
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179 expireTokens = function()
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180 for token,value in pairs(tokens_mails) do
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181 if isExpired(token) then
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182 module:log("info","Expiring password reset request from user '%s', not used.", tokens_mails[token]);
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183 tokens_mails[token] = nil;
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184 tokens_expiration[token] = nil;
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185 end
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186 end
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187 return timer_repeat;
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188 end
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189
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190 -- Check if a user has a active token not used yet.
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191 function hasTokenActive(address)
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192 for token,value in pairs(tokens_mails) do
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193 if address == value and not isExpired(token) then
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194 return token;
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195 end
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196 end
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197 return nil;
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198 end
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199
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200 function generateUrl(token)
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201 local url;
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202
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203 if https_host then
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204 url = "https://" .. https_host;
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205 else
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206 url = "http://" .. http_host;
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207 end
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208
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209 if https_port then
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210 url = url .. ":" .. https_port[1];
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211 else
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212 url = url .. ":" .. http_port[1];
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213 end
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214
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215 url = url .. url_path .. "token.html?" .. token;
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216
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217 return url;
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218 end
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219
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220 function sendMessage(jid, subject, message)
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221 local msg = st.message({ from = module.host; to = jid; }):
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222 tag("subject"):text(subject):up():
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223 tag("body"):text(message);
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224 module:send(msg);
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225 end
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226
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227 function send_token_mail(form, origin)
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228 local user, host, resource = jidutil.split(form.username);
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229 local prepped_username = nodeprep(user);
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230 local prepped_mail = form.email;
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231 local jid = prepped_username .. "@" .. host;
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232
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233 if not prepped_username then
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234 return nil, "El usuario contiene caracteres incorrectos";
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235 end
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236 if #prepped_username == 0 then
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237 return nil, "El campo usuario está vacio";
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238 end
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239 if not usermanager.user_exists(prepped_username, module.host) then
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240 return nil, "El usuario NO existe";
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241 end
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242
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243 if #prepped_mail == 0 then
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244 return nil, "El campo email está vacio";
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245 end
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246
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247 local vcarduser = get_user_vcard(prepped_username, module.host);
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248
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249 if not vcarduser then
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250 return nil, "User has not vCard";
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251 else
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252 if not vcarduser.EMAIL then
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253 return nil, "Esa cuente no tiene ningún email configurado en su vCard";
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254 end
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255
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256 email = string.lower(vcarduser.EMAIL[1]);
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257
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258 if email ~= string.lower(prepped_mail) then
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259 return nil, "Dirección eMail incorrecta";
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260 end
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261
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262 -- Check if has already a valid token, not used yet.
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263 if hasTokenActive(jid) then
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264 local valid_until = tokens_expiration[hasTokenActive(jid)] + 86400;
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265 return nil, "Ya tienes una petición de restablecimiento de clave válida hasta: " .. datetime.date(valid_until) .. " " .. datetime.time(valid_until);
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266 end
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267
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268 local url_token = generateToken(jid);
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269 local url = generateUrl(url_token);
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270 local email_body = render(get_template("sendtoken",".mail"), {jid = jid, url = url} );
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271
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272 module:log("info", "Sending password reset mail to user %s", jid);
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273 send_email(email, smtp_address, email_body, mail_subject);
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274 return "ok";
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275 end
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276
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277 end
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278
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279 function reset_password_with_token(form, origin)
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280 local token = form.token;
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281 local password = form.newpassword;
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282
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283 if not token then
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284 return nil, "El Token es inválido";
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285 end
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286 if not tokens_mails[token] then
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287 return nil, "El Token no existe o ya fué usado";
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288 end
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289 if not password then
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290 return nil, "La campo clave no puede estar vacio";
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291 end
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292 if #password < 5 then
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293 return nil, "La clave debe tener una longitud de al menos 5 caracteres";
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294 end
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295 local jid = tokens_mails[token];
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296 local user, host, resource = jidutil.split(jid);
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297
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298 usermanager.set_password(user, password, host);
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299 module:log("info", "Password changed with token for user %s", jid);
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300 tokens_mails[token] = nil;
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301 tokens_expiration[token] = nil;
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302 sendMessage(jid, mail_subject, mail_body);
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303 return "ok";
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304 end
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305
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306 function generate_success(event, form)
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307 return render(sendmail_success_tpl, { jid = nodeprep(form.username).."@"..module.host });
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308 end
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309
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310 function generate_register_response(event, form, ok, err)
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311 local message;
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312 if ok then
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313 return generate_success(event, form);
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314 else
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315 return generate_page(event, { register_error = err });
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316 end
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317 end
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318
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319 function handle_form_token(event)
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320 local request, response = event.request, event.response;
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321 local form = http.formdecode(request.body);
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322
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323 local token_ok, token_err = send_token_mail(form, request);
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324 response:send(generate_register_response(event, form, token_ok, token_err));
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325
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326 return true; -- Leave connection open until we respond above
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327 end
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328
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329 function generate_reset_success(event, form)
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330 return render(reset_success_tpl, { });
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331 end
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332
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333 function generate_reset_response(event, form, ok, err)
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334 local message;
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335 if ok then
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336 return generate_reset_success(event, form);
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337 else
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338 return generate_token_page(event, { register_error = err });
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339 end
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340 end
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341
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342 function handle_form_reset(event)
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343 local request, response = event.request, event.response;
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344 local form = http.formdecode(request.body);
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345
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346 local reset_ok, reset_err = reset_password_with_token(form, request);
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347 response:send(generate_reset_response(event, form, reset_ok, reset_err));
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348
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349 return true; -- Leave connection open until we respond above
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350
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351 end
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352
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353 timer.add_task(timer_repeat, expireTokens);
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354
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355 module:provides("http", {
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356 default_path = url_path;
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357 route = {
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358 ["GET /style.css"] = render(get_template("style",".css"), {});
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359 ["GET /token.html"] = generate_token_page;
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360 ["GET /"] = generate_page;
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361 ["POST /token.html"] = handle_form_reset;
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362 ["POST /"] = handle_form_token;
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363 };
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364 });
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365
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366
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