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comparison util/openssl.lua @ 4823:a61e78b4a2b3

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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
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children befb1923527d
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4821:deec69fc33e5 4823:a61e78b4a2b3
1 local type, tostring, pairs, ipairs = type, tostring, pairs, ipairs;
2 local t_insert, t_concat = table.insert, table.concat;
3 local s_format = string.format;
4
5 local oid_xmppaddr = "1.3.6.1.5.5.7.8.5"; -- [XMPP-CORE]
6 local oid_dnssrv = "1.3.6.1.5.5.7.8.7"; -- [SRV-ID]
7
8 local idna_to_ascii = require "util.encodings".idna.to_ascii;
9
10 local _M = {};
11 local config = {};
12 _M.config = config;
13
14 local ssl_config = {};
15 local ssl_config_mt = {__index=ssl_config};
16
17 function config.new()
18 return setmetatable({
19 req = {
20 distinguished_name = "distinguished_name",
21 req_extensions = "v3_extensions",
22 x509_extensions = "v3_extensions",
23 prompt = "no",
24 },
25 distinguished_name = {
26 commonName = "example.com",
27 countryName = "GB",
28 localityName = "The Internet",
29 organizationName = "Your Organisation",
30 organizationalUnitName = "XMPP Department",
31 emailAddress = "xmpp@example.com",
32 },
33 v3_extensions = {
34 basicConstraints = "CA:FALSE",
35 keyUsage = "digitalSignature,keyEncipherment",
36 extendedKeyUsage = "serverAuth,clientAuth",
37 subjectAltName = "@subject_alternative_name",
38 },
39 subject_alternative_name = {
40 DNS = {},
41 otherName = {},
42 },
43 }, ssl_config_mt);
44 end
45
46 function ssl_config:serialize()
47 local s = "";
48 for k, t in pairs(self) do
49 s = s .. ("[%s]\n"):format(k);
50 if k == "subject_alternative_name" then
51 for san, n in pairs(t) do
52 for i = 1,#n do
53 s = s .. s_format("%s.%d = %s\n", san, i -1, n[i]);
54 end
55 end
56 else
57 for k, v in pairs(t) do
58 s = s .. ("%s = %s\n"):format(k, v);
59 end
60 end
61 s = s .. "\n";
62 end
63 return s;
64 end
65
66 local function utf8string(s)
67 -- This is how we tell openssl not to encode UTF-8 strings as fake Latin1
68 return s_format("FORMAT:UTF8,UTF8:%s", s);
69 end
70
71 local function ia5string(s)
72 return s_format("IA5STRING:%s", s);
73 end
74
75 local util = {};
76 _M.util = {
77 utf8string = utf8string,
78 ia5string = ia5string,
79 };
80
81 local function xmppAddr(t, host)
82 end
83
84 function ssl_config:add_dNSName(host)
85 t_insert(self.subject_alternative_name.DNS, idna_to_ascii(host));
86 end
87
88 function ssl_config:add_sRVName(host, service)
89 t_insert(self.subject_alternative_name.otherName,
90 s_format("%s;%s", oid_dnssrv, ia5string("_" .. service .."." .. idna_to_ascii(host))));
91 end
92
93 function ssl_config:add_xmppAddr(host)
94 t_insert(self.subject_alternative_name.otherName,
95 s_format("%s;%s", oid_xmppaddr, utf8string(host)));
96 end
97
98 function ssl_config:from_prosody(hosts, config, certhosts, raw)
99 -- TODO Decide if this should go elsewhere
100 local found_matching_hosts = false;
101 for i = 1,#certhosts do
102 local certhost = certhosts[i];
103 for name, host in pairs(hosts) do
104 if name == certhost or name:sub(-1-#certhost) == "."..certhost then
105 found_matching_hosts = true;
106 self:add_dNSName(name);
107 --print(name .. "#component_module: " .. (config.get(name, "core", "component_module") or "nil"));
108 if config.get(name, "core", "component_module") == nil then
109 self:add_sRVName(name, "xmpp-client");
110 end
111 --print(name .. "#anonymous_login: " .. tostring(config.get(name, "core", "anonymous_login")));
112 if not (config.get(name, "core", "anonymous_login") or
113 config.get(name, "core", "authentication") == "anonymous") then
114 self:add_sRVName(name, "xmpp-server");
115 end
116 self:add_xmppAddr(name);
117 end
118 end
119 end
120 if not found_matching_hosts then
121 return nil, "no-matching-hosts";
122 end
123 end
124
125 do -- Lua to shell calls.
126 local function shell_escape(s)
127 return s:gsub("'",[['\'']]);
128 end
129
130 local function serialize(f,o)
131 local r = {"openssl", f};
132 for k,v in pairs(o) do
133 if type(k) == "string" then
134 t_insert(r, ("-%s"):format(k));
135 if v ~= true then
136 t_insert(r, ("'%s'"):format(shell_escape(tostring(v))));
137 end
138 end
139 end
140 for k,v in ipairs(o) do
141 t_insert(r, ("'%s'"):format(shell_escape(tostring(v))));
142 end
143 return t_concat(r, " ");
144 end
145
146 local os_execute = os.execute;
147 setmetatable(_M, {
148 __index=function(self,f)
149 return function(opts)
150 return 0 == os_execute(serialize(f, type(opts) == "table" and opts or {}));
151 end;
152 end;
153 });
154 end
155
156 return _M;