1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local softreq = require"util.dependencies".softreq;
local ssl = softreq"ssl";
if not ssl then
return {
create_context = function ()
return nil, "LuaSec (required for encryption) was not found";
end;
reload_ssl_config = function () end;
}
end
local configmanager = require "core.configmanager";
local log = require "util.logger".init("certmanager");
local ssl_context = ssl.context or softreq"ssl.context";
local ssl_x509 = ssl.x509 or softreq"ssl.x509";
local ssl_newcontext = ssl.newcontext;
local new_config = require"util.sslconfig".new;
local stat = require "lfs".attributes;
local tostring = tostring;
local pairs = pairs;
local type = type;
local io_open = io.open;
local select = select;
local prosody = prosody;
local resolve_path = require"util.paths".resolve_relative_path;
local config_path = prosody.paths.config;
local luasec_major, luasec_minor = ssl._VERSION:match("^(%d+)%.(%d+)");
local luasec_version = luasec_major * 100 + luasec_minor;
local luasec_has = {
-- TODO If LuaSec ever starts exposing these things itself, use that instead
cipher_server_preference = luasec_version >= 2;
no_ticket = luasec_version >= 4;
no_compression = luasec_version >= 5;
single_dh_use = luasec_version >= 2;
single_ecdh_use = luasec_version >= 2;
};
local _ENV = nil;
-- Global SSL options if not overridden per-host
local global_ssl_config = configmanager.get("*", "ssl");
local global_certificates = configmanager.get("*", "certificates") or "certs";
local crt_try = { "", "/%s.crt", "/%s/fullchain.pem", "/%s.pem", };
local key_try = { "", "/%s.key", "/%s/privkey.pem", "/%s.pem", };
local function find_cert(user_certs, name)
local certs = resolve_path(config_path, user_certs or global_certificates);
for i = 1, #crt_try do
local crt_path = certs .. crt_try[i]:format(name);
local key_path = certs .. key_try[i]:format(name);
if stat(crt_path, "mode") == "file" then
if key_path:sub(-4) == ".crt" then
key_path = key_path:sub(1, -4) .. "key";
if stat(key_path, "mode") == "file" then
return { certificate = crt_path, key = key_path };
end
elseif stat(key_path, "mode") == "file" then
return { certificate = crt_path, key = key_path };
end
end
end
end
local function find_host_cert(host)
if not host then return nil; end
return find_cert(configmanager.get(host, "certificate"), host) or find_host_cert(host:match("%.(.+)$"));
end
local function find_service_cert(service, port)
local cert_config = configmanager.get("*", service.."_certificate");
if type(cert_config) == "table" then
cert_config = cert_config[port] or cert_config.default;
end
return find_cert(cert_config, service);
end
-- Built-in defaults
local core_defaults = {
capath = "/etc/ssl/certs";
depth = 9;
protocol = "tlsv1+";
verify = (ssl_x509 and { "peer", "client_once", }) or "none";
options = {
cipher_server_preference = luasec_has.cipher_server_preference;
no_ticket = luasec_has.no_ticket;
no_compression = luasec_has.no_compression and configmanager.get("*", "ssl_compression") ~= true;
single_dh_use = luasec_has.single_dh_use;
single_ecdh_use = luasec_has.single_ecdh_use;
};
verifyext = { "lsec_continue", "lsec_ignore_purpose" };
curve = "secp384r1";
ciphers = "HIGH+kEDH:HIGH+kEECDH:HIGH:!PSK:!SRP:!3DES:!aNULL";
}
local path_options = { -- These we pass through resolve_path()
key = true, certificate = true, cafile = true, capath = true, dhparam = true
}
if luasec_version < 5 and ssl_x509 then
-- COMPAT mw/luasec-hg
for i=1,#core_defaults.verifyext do -- Remove lsec_ prefix
core_defaults.verify[#core_defaults.verify+1] = core_defaults.verifyext[i]:sub(6);
end
end
local function create_context(host, mode, ...)
local cfg = new_config();
cfg:apply(core_defaults);
local service_name, port = host:match("^(%w+) port (%d+)$");
if service_name then
cfg:apply(find_service_cert(service_name, tonumber(port)));
else
cfg:apply(find_host_cert(host));
end
cfg:apply({
mode = mode,
-- We can't read the password interactively when daemonized
password = function() log("error", "Encrypted certificate for %s requires 'ssl' 'password' to be set in config", host); end;
});
cfg:apply(global_ssl_config);
for i = select('#', ...), 1, -1 do
cfg:apply(select(i, ...));
end
local user_ssl_config = cfg:final();
if mode == "server" then
if not user_ssl_config.key then return nil, "No key present in SSL/TLS configuration for "..host; end
if not user_ssl_config.certificate then return nil, "No certificate present in SSL/TLS configuration for "..host; end
end
for option in pairs(path_options) do
if type(user_ssl_config[option]) == "string" then
user_ssl_config[option] = resolve_path(config_path, user_ssl_config[option]);
else
user_ssl_config[option] = nil;
end
end
-- LuaSec expects dhparam to be a callback that takes two arguments.
-- We ignore those because it is mostly used for having a separate
-- set of params for EXPORT ciphers, which we don't have by default.
if type(user_ssl_config.dhparam) == "string" then
local f, err = io_open(user_ssl_config.dhparam);
if not f then return nil, "Could not open DH parameters: "..err end
local dhparam = f:read("*a");
f:close();
user_ssl_config.dhparam = function() return dhparam; end
end
local ctx, err = ssl_newcontext(user_ssl_config);
-- COMPAT Older LuaSec ignores the cipher list from the config, so we have to take care
-- of it ourselves (W/A for #x)
if ctx and user_ssl_config.ciphers then
local success;
success, err = ssl_context.setcipher(ctx, user_ssl_config.ciphers);
if not success then ctx = nil; end
end
if not ctx then
err = err or "invalid ssl config"
local file = err:match("^error loading (.-) %(");
if file then
if file == "private key" then
file = user_ssl_config.key or "your private key";
elseif file == "certificate" then
file = user_ssl_config.certificate or "your certificate file";
end
local reason = err:match("%((.+)%)$") or "some reason";
if reason == "Permission denied" then
reason = "Check that the permissions allow Prosody to read this file.";
elseif reason == "No such file or directory" then
reason = "Check that the path is correct, and the file exists.";
elseif reason == "system lib" then
reason = "Previous error (see logs), or other system error.";
elseif reason == "(null)" or not reason then
reason = "Check that the file exists and the permissions are correct";
else
reason = "Reason: "..tostring(reason):lower();
end
log("error", "SSL/TLS: Failed to load '%s': %s (for %s)", file, reason, host);
else
log("error", "SSL/TLS: Error initialising for %s: %s", host, err);
end
end
return ctx, err, user_ssl_config;
end
local function reload_ssl_config()
global_ssl_config = configmanager.get("*", "ssl");
if luasec_has.no_compression then
core_defaults.options.no_compression = configmanager.get("*", "ssl_compression") ~= true;
end
end
prosody.events.add_handler("config-reloaded", reload_ssl_config);
return {
create_context = create_context;
reload_ssl_config = reload_ssl_config;
};
|
