Annotate

util/x509.lua @ 4342:735d39538944

mod_pubsub: Send node items to new subscribers
author Matthew Wild <mwild1@gmail.com>
date Sun, 14 Aug 2011 13:37:42 -0400
parent 4330:520fcb333cba
child 4486:f04db5e7e90d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3651
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
1 -- Prosody IM
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
2 -- Copyright (C) 2010 Matthew Wild
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
3 -- Copyright (C) 2010 Paul Aurich
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
4 --
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
5 -- This project is MIT/X11 licensed. Please see the
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
6 -- COPYING file in the source package for more information.
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
7 --
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
8
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
9 -- TODO: I feel a fair amount of this logic should be integrated into Luasec,
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
10 -- so that everyone isn't re-inventing the wheel. Dependencies on
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
11 -- IDN libraries complicate that.
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
12
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
13
4330
520fcb333cba util.x509: Update references to published RFCs
Paul Aurich <paul@darkrain42.org>
parents: 3735
diff changeset
14 -- [TLS-CERTS] - http://tools.ietf.org/html/rfc6125
520fcb333cba util.x509: Update references to published RFCs
Paul Aurich <paul@darkrain42.org>
parents: 3735
diff changeset
15 -- [XMPP-CORE] - http://tools.ietf.org/html/rfc6120
3651
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
16 -- [SRV-ID] - http://tools.ietf.org/html/rfc4985
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
17 -- [IDNA] - http://tools.ietf.org/html/rfc5890
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
18 -- [LDAP] - http://tools.ietf.org/html/rfc4519
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
19 -- [PKIX] - http://tools.ietf.org/html/rfc5280
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
20
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
21 local nameprep = require "util.encodings".stringprep.nameprep;
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
22 local idna_to_ascii = require "util.encodings".idna.to_ascii;
3735
40b54c46a14c util.x509: "certverification" -> "x509".
Waqas Hussain <waqas20@gmail.com>
parents: 3733
diff changeset
23 local log = require "util.logger".init("x509");
3651
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
24
3735
40b54c46a14c util.x509: "certverification" -> "x509".
Waqas Hussain <waqas20@gmail.com>
parents: 3733
diff changeset
25 module "x509"
3651
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
26
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
27 local oid_commonname = "2.5.4.3"; -- [LDAP] 2.3
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
28 local oid_subjectaltname = "2.5.29.17"; -- [PKIX] 4.2.1.6
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
29 local oid_xmppaddr = "1.3.6.1.5.5.7.8.5"; -- [XMPP-CORE]
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
30 local oid_dnssrv = "1.3.6.1.5.5.7.8.7"; -- [SRV-ID]
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
31
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
32 -- Compare a hostname (possibly international) with asserted names
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
33 -- extracted from a certificate.
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
34 -- This function follows the rules laid out in
4330
520fcb333cba util.x509: Update references to published RFCs
Paul Aurich <paul@darkrain42.org>
parents: 3735
diff changeset
35 -- sections 6.4.1 and 6.4.2 of [TLS-CERTS]
3651
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
36 --
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
37 -- A wildcard ("*") all by itself is allowed only as the left-most label
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
38 local function compare_dnsname(host, asserted_names)
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
39 -- TODO: Sufficient normalization? Review relevant specs.
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
40 local norm_host = idna_to_ascii(host)
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
41 if norm_host == nil then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
42 log("info", "Host %s failed IDNA ToASCII operation", host)
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
43 return false
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
44 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
45
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
46 norm_host = norm_host:lower()
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
47
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
48 local host_chopped = norm_host:gsub("^[^.]+%.", "") -- everything after the first label
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
49
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
50 for i=1,#asserted_names do
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
51 local name = asserted_names[i]
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
52 if norm_host == name:lower() then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
53 log("debug", "Cert dNSName %s matched hostname", name);
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
54 return true
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
55 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
56
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
57 -- Allow the left most label to be a "*"
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
58 if name:match("^%*%.") then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
59 local rest_name = name:gsub("^[^.]+%.", "")
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
60 if host_chopped == rest_name:lower() then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
61 log("debug", "Cert dNSName %s matched hostname", name);
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
62 return true
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
63 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
64 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
65 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
66
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
67 return false
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
68 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
69
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
70 -- Compare an XMPP domain name with the asserted id-on-xmppAddr
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
71 -- identities extracted from a certificate. Both are UTF8 strings.
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
72 --
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
73 -- Per [XMPP-CORE], matches against asserted identities don't include
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
74 -- wildcards, so we just do a normalize on both and then a string comparison
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
75 --
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
76 -- TODO: Support for full JIDs?
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
77 local function compare_xmppaddr(host, asserted_names)
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
78 local norm_host = nameprep(host)
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
79
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
80 for i=1,#asserted_names do
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
81 local name = asserted_names[i]
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
82
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
83 -- We only want to match against bare domains right now, not
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
84 -- those crazy full-er JIDs.
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
85 if name:match("[@/]") then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
86 log("debug", "Ignoring xmppAddr %s because it's not a bare domain", name)
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
87 else
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
88 local norm_name = nameprep(name)
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
89 if norm_name == nil then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
90 log("info", "Ignoring xmppAddr %s, failed nameprep!", name)
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
91 else
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
92 if norm_host == norm_name then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
93 log("debug", "Cert xmppAddr %s matched hostname", name)
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
94 return true
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
95 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
96 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
97 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
98 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
99
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
100 return false
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
101 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
102
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
103 -- Compare a host + service against the asserted id-on-dnsSRV (SRV-ID)
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
104 -- identities extracted from a certificate.
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
105 --
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
106 -- Per [SRV-ID], the asserted identities will be encoded in ASCII via ToASCII.
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
107 -- Comparison is done case-insensitively, and a wildcard ("*") all by itself
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
108 -- is allowed only as the left-most non-service label.
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
109 local function compare_srvname(host, service, asserted_names)
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
110 local norm_host = idna_to_ascii(host)
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
111 if norm_host == nil then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
112 log("info", "Host %s failed IDNA ToASCII operation", host);
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
113 return false
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
114 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
115
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
116 -- Service names start with a "_"
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
117 if service:match("^_") == nil then service = "_"..service end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
118
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
119 norm_host = norm_host:lower();
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
120 local host_chopped = norm_host:gsub("^[^.]+%.", "") -- everything after the first label
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
121
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
122 for i=1,#asserted_names do
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
123 local asserted_service, name = asserted_names[i]:match("^(_[^.]+)%.(.*)");
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
124 if service == asserted_service then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
125 if norm_host == name:lower() then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
126 log("debug", "Cert SRVName %s matched hostname", name);
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
127 return true;
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
128 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
129
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
130 -- Allow the left most label to be a "*"
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
131 if name:match("^%*%.") then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
132 local rest_name = name:gsub("^[^.]+%.", "")
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
133 if host_chopped == rest_name:lower() then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
134 log("debug", "Cert SRVName %s matched hostname", name)
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
135 return true
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
136 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
137 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
138 if norm_host == name:lower() then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
139 log("debug", "Cert SRVName %s matched hostname", name);
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
140 return true
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
141 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
142 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
143 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
144
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
145 return false
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
146 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
147
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
148 function verify_identity(host, service, cert)
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
149 local ext = cert:extensions()
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
150 if ext[oid_subjectaltname] then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
151 local sans = ext[oid_subjectaltname];
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
152
4330
520fcb333cba util.x509: Update references to published RFCs
Paul Aurich <paul@darkrain42.org>
parents: 3735
diff changeset
153 -- Per [TLS-CERTS] 6.3, 6.4.4, "a client MUST NOT seek a match for a
3651
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
154 -- reference identifier if the presented identifiers include a DNS-ID
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
155 -- SRV-ID, URI-ID, or any application-specific identifier types"
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
156 local had_supported_altnames = false
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
157
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
158 if sans[oid_xmppaddr] then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
159 had_supported_altnames = true
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
160 if compare_xmppaddr(host, sans[oid_xmppaddr]) then return true end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
161 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
162
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
163 if sans[oid_dnssrv] then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
164 had_supported_altnames = true
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
165 -- Only check srvNames if the caller specified a service
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
166 if service and compare_srvname(host, service, sans[oid_dnssrv]) then return true end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
167 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
168
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
169 if sans["dNSName"] then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
170 had_supported_altnames = true
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
171 if compare_dnsname(host, sans["dNSName"]) then return true end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
172 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
173
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
174 -- We don't need URIs, but [TLS-CERTS] is clear.
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
175 if sans["uniformResourceIdentifier"] then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
176 had_supported_altnames = true
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
177 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
178
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
179 if had_supported_altnames then return false end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
180 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
181
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
182 -- Extract a common name from the certificate, and check it as if it were
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
183 -- a dNSName subjectAltName (wildcards may apply for, and receive,
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
184 -- cat treats)
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
185 --
4330
520fcb333cba util.x509: Update references to published RFCs
Paul Aurich <paul@darkrain42.org>
parents: 3735
diff changeset
186 -- Per [TLS-CERTS] 1.8, a CN-ID is the Common Name from a cert subject
3651
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
187 -- which has one and only one Common Name
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
188 local subject = cert:subject()
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
189 local cn = nil
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
190 for i=1,#subject do
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
191 local dn = subject[i]
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
192 if dn["oid"] == oid_commonname then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
193 if cn then
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
194 log("info", "Certificate has multiple common names")
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
195 return false
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
196 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
197
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
198 cn = dn["value"];
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
199 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
200 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
201
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
202 if cn then
4330
520fcb333cba util.x509: Update references to published RFCs
Paul Aurich <paul@darkrain42.org>
parents: 3735
diff changeset
203 -- Per [TLS-CERTS] 6.4.4, follow the comparison rules for dNSName SANs.
3651
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
204 return compare_dnsname(host, { cn })
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
205 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
206
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
207 -- If all else fails, well, why should we be any different?
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
208 return false
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
209 end
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
210
337391d34b70 s2s: SASL EXTERNAL
Paul Aurich <paul@darkrain42.org>
parents:
diff changeset
211 return _M;