Annotate

util/openssl.lua @ 4823:a61e78b4a2b3

util.openssl: Add wrapper for the openssl cli tool and move certificate config logic from util.x509 into it.
author Kim Alvefur <zash@zash.se>
date Wed, 09 May 2012 00:12:53 +0200
child 5290:befb1923527d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4823
a61e78b4a2b3 util.openssl: Add wrapper for the openssl cli tool and move certificate config logic from util.x509 into it.
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1 local type, tostring, pairs, ipairs = type, tostring, pairs, ipairs;
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2 local t_insert, t_concat = table.insert, table.concat;
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3 local s_format = string.format;
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4
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5 local oid_xmppaddr = "1.3.6.1.5.5.7.8.5"; -- [XMPP-CORE]
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6 local oid_dnssrv = "1.3.6.1.5.5.7.8.7"; -- [SRV-ID]
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7
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8 local idna_to_ascii = require "util.encodings".idna.to_ascii;
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9
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10 local _M = {};
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11 local config = {};
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12 _M.config = config;
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13
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14 local ssl_config = {};
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15 local ssl_config_mt = {__index=ssl_config};
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16
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17 function config.new()
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18 return setmetatable({
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19 req = {
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20 distinguished_name = "distinguished_name",
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21 req_extensions = "v3_extensions",
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22 x509_extensions = "v3_extensions",
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23 prompt = "no",
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24 },
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25 distinguished_name = {
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26 commonName = "example.com",
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27 countryName = "GB",
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28 localityName = "The Internet",
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29 organizationName = "Your Organisation",
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30 organizationalUnitName = "XMPP Department",
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31 emailAddress = "xmpp@example.com",
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32 },
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33 v3_extensions = {
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34 basicConstraints = "CA:FALSE",
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35 keyUsage = "digitalSignature,keyEncipherment",
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36 extendedKeyUsage = "serverAuth,clientAuth",
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37 subjectAltName = "@subject_alternative_name",
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38 },
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39 subject_alternative_name = {
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40 DNS = {},
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41 otherName = {},
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42 },
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43 }, ssl_config_mt);
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44 end
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45
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46 function ssl_config:serialize()
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47 local s = "";
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48 for k, t in pairs(self) do
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49 s = s .. ("[%s]\n"):format(k);
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50 if k == "subject_alternative_name" then
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51 for san, n in pairs(t) do
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52 for i = 1,#n do
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53 s = s .. s_format("%s.%d = %s\n", san, i -1, n[i]);
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54 end
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55 end
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56 else
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57 for k, v in pairs(t) do
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58 s = s .. ("%s = %s\n"):format(k, v);
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59 end
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60 end
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61 s = s .. "\n";
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62 end
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63 return s;
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64 end
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65
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66 local function utf8string(s)
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67 -- This is how we tell openssl not to encode UTF-8 strings as fake Latin1
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68 return s_format("FORMAT:UTF8,UTF8:%s", s);
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69 end
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70
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71 local function ia5string(s)
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72 return s_format("IA5STRING:%s", s);
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73 end
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74
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75 local util = {};
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76 _M.util = {
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77 utf8string = utf8string,
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78 ia5string = ia5string,
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79 };
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80
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81 local function xmppAddr(t, host)
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82 end
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83
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84 function ssl_config:add_dNSName(host)
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85 t_insert(self.subject_alternative_name.DNS, idna_to_ascii(host));
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86 end
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87
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88 function ssl_config:add_sRVName(host, service)
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89 t_insert(self.subject_alternative_name.otherName,
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90 s_format("%s;%s", oid_dnssrv, ia5string("_" .. service .."." .. idna_to_ascii(host))));
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91 end
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92
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93 function ssl_config:add_xmppAddr(host)
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94 t_insert(self.subject_alternative_name.otherName,
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95 s_format("%s;%s", oid_xmppaddr, utf8string(host)));
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96 end
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97
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98 function ssl_config:from_prosody(hosts, config, certhosts, raw)
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99 -- TODO Decide if this should go elsewhere
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100 local found_matching_hosts = false;
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101 for i = 1,#certhosts do
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102 local certhost = certhosts[i];
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103 for name, host in pairs(hosts) do
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104 if name == certhost or name:sub(-1-#certhost) == "."..certhost then
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105 found_matching_hosts = true;
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106 self:add_dNSName(name);
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107 --print(name .. "#component_module: " .. (config.get(name, "core", "component_module") or "nil"));
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108 if config.get(name, "core", "component_module") == nil then
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109 self:add_sRVName(name, "xmpp-client");
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110 end
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111 --print(name .. "#anonymous_login: " .. tostring(config.get(name, "core", "anonymous_login")));
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112 if not (config.get(name, "core", "anonymous_login") or
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113 config.get(name, "core", "authentication") == "anonymous") then
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114 self:add_sRVName(name, "xmpp-server");
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115 end
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116 self:add_xmppAddr(name);
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117 end
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118 end
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119 end
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120 if not found_matching_hosts then
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121 return nil, "no-matching-hosts";
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122 end
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123 end
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124
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125 do -- Lua to shell calls.
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126 local function shell_escape(s)
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127 return s:gsub("'",[['\'']]);
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128 end
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129
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130 local function serialize(f,o)
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131 local r = {"openssl", f};
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132 for k,v in pairs(o) do
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133 if type(k) == "string" then
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134 t_insert(r, ("-%s"):format(k));
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135 if v ~= true then
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136 t_insert(r, ("'%s'"):format(shell_escape(tostring(v))));
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137 end
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138 end
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139 end
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140 for k,v in ipairs(o) do
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141 t_insert(r, ("'%s'"):format(shell_escape(tostring(v))));
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142 end
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143 return t_concat(r, " ");
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144 end
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145
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146 local os_execute = os.execute;
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147 setmetatable(_M, {
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148 __index=function(self,f)
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149 return function(opts)
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150 return 0 == os_execute(serialize(f, type(opts) == "table" and opts or {}));
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151 end;
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152 end;
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153 });
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154 end
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155
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156 return _M;