1 /*
2 * libwebsockets - small server side websockets and web server implementation
3 *
4 * Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25 #include "private-lib-core.h"
26
27 /*
28 * fakes POLLIN on all tls guys with buffered rx
29 *
30 * returns nonzero if any tls guys had POLLIN faked
31 */
32
33 int
lws_tls_fake_POLLIN_for_buffered(struct lws_context_per_thread * pt)34 lws_tls_fake_POLLIN_for_buffered(struct lws_context_per_thread *pt)
35 {
36 int ret = 0;
37
38 lws_start_foreach_dll_safe(struct lws_dll2 *, p, p1,
39 lws_dll2_get_head(&pt->tls.dll_pending_tls_owner)) {
40 struct lws *wsi = lws_container_of(p, struct lws,
41 tls.dll_pending_tls);
42
43 if (wsi->position_in_fds_table >= 0) {
44
45 pt->fds[wsi->position_in_fds_table].revents = (short)
46 (pt->fds[wsi->position_in_fds_table].revents |
47 (pt->fds[wsi->position_in_fds_table].events & LWS_POLLIN));
48 ret |= pt->fds[wsi->position_in_fds_table].revents & LWS_POLLIN;
49 }
50
51 } lws_end_foreach_dll_safe(p, p1);
52
53 return !!ret;
54 }
55
56 void
__lws_ssl_remove_wsi_from_buffered_list(struct lws * wsi)57 __lws_ssl_remove_wsi_from_buffered_list(struct lws *wsi)
58 {
59 lws_dll2_remove(&wsi->tls.dll_pending_tls);
60 }
61
62 void
lws_ssl_remove_wsi_from_buffered_list(struct lws * wsi)63 lws_ssl_remove_wsi_from_buffered_list(struct lws *wsi)
64 {
65 struct lws_context_per_thread *pt = &wsi->a.context->pt[(int)wsi->tsi];
66
67 lws_pt_lock(pt, __func__);
68 __lws_ssl_remove_wsi_from_buffered_list(wsi);
69 lws_pt_unlock(pt);
70 }
71
72 #if defined(LWS_WITH_SERVER)
73 int
lws_tls_check_cert_lifetime(struct lws_vhost * v)74 lws_tls_check_cert_lifetime(struct lws_vhost *v)
75 {
76 time_t now = (time_t)lws_now_secs(), life = 0;
77 struct lws_acme_cert_aging_args caa;
78 union lws_tls_cert_info_results ir;
79 int n;
80
81 if (v->tls.ssl_ctx && !v->tls.skipped_certs) {
82
83 if (now < 1542933698) /* Nov 23 2018 00:42 UTC */
84 /* our clock is wrong and we can't judge the certs */
85 return -1;
86
87 n = lws_tls_vhost_cert_info(v, LWS_TLS_CERT_INFO_VALIDITY_TO,
88 &ir, 0);
89 if (n)
90 return 1;
91
92 life = (ir.time - now) / (24 * 3600);
93 lwsl_notice(" vhost %s: cert expiry: %dd\n", v->name,
94 (int)life);
95 } else
96 lwsl_info(" vhost %s: no cert\n", v->name);
97
98 memset(&caa, 0, sizeof(caa));
99 caa.vh = v;
100 lws_broadcast(&v->context->pt[0], LWS_CALLBACK_VHOST_CERT_AGING, (void *)&caa,
101 (size_t)(ssize_t)life);
102
103 return 0;
104 }
105
106 int
lws_tls_check_all_cert_lifetimes(struct lws_context * context)107 lws_tls_check_all_cert_lifetimes(struct lws_context *context)
108 {
109 struct lws_vhost *v = context->vhost_list;
110
111 while (v) {
112 if (lws_tls_check_cert_lifetime(v) < 0)
113 return -1;
114 v = v->vhost_next;
115 }
116
117 return 0;
118 }
119
120 /*
121 * LWS_TLS_EXTANT_NO : skip adding the cert
122 * LWS_TLS_EXTANT_YES : use the cert and private key paths normally
123 * LWS_TLS_EXTANT_ALTERNATIVE: normal paths not usable, try alternate if poss
124 */
125 enum lws_tls_extant
lws_tls_generic_cert_checks(struct lws_vhost * vhost,const char * cert,const char * private_key)126 lws_tls_generic_cert_checks(struct lws_vhost *vhost, const char *cert,
127 const char *private_key)
128 {
129 int n, m;
130
131 /*
132 * The user code can choose to either pass the cert and
133 * key filepaths using the info members like this, or it can
134 * leave them NULL; force the vhost SSL_CTX init using the info
135 * options flag LWS_SERVER_OPTION_CREATE_VHOST_SSL_CTX; and
136 * set up the cert himself using the user callback
137 * LWS_CALLBACK_OPENSSL_LOAD_EXTRA_SERVER_VERIFY_CERTS, which
138 * happened just above and has the vhost SSL_CTX * in the user
139 * parameter.
140 */
141
142 if (!cert || !private_key)
143 return LWS_TLS_EXTANT_NO;
144
145 n = (int)lws_tls_use_any_upgrade_check_extant(cert);
146 if (n == LWS_TLS_EXTANT_ALTERNATIVE)
147 return LWS_TLS_EXTANT_ALTERNATIVE;
148 m = (int)lws_tls_use_any_upgrade_check_extant(private_key);
149 if (m == LWS_TLS_EXTANT_ALTERNATIVE)
150 return LWS_TLS_EXTANT_ALTERNATIVE;
151
152 if ((n == LWS_TLS_EXTANT_NO || m == LWS_TLS_EXTANT_NO) &&
153 (vhost->options & LWS_SERVER_OPTION_IGNORE_MISSING_CERT)) {
154 lwsl_notice("Ignoring missing %s or %s\n", cert, private_key);
155 vhost->tls.skipped_certs = 1;
156
157 return LWS_TLS_EXTANT_NO;
158 }
159
160 /*
161 * the cert + key exist
162 */
163
164 return LWS_TLS_EXTANT_YES;
165 }
166
167 /*
168 * update the cert for every vhost using the given path
169 */
170
171 int
lws_tls_cert_updated(struct lws_context * context,const char * certpath,const char * keypath,const char * mem_cert,size_t len_mem_cert,const char * mem_privkey,size_t len_mem_privkey)172 lws_tls_cert_updated(struct lws_context *context, const char *certpath,
173 const char *keypath,
174 const char *mem_cert, size_t len_mem_cert,
175 const char *mem_privkey, size_t len_mem_privkey)
176 {
177 struct lws wsi;
178
179 wsi.a.context = context;
180
181 lws_start_foreach_ll(struct lws_vhost *, v, context->vhost_list) {
182 wsi.a.vhost = v; /* not a real bound wsi */
183 if (v->tls.alloc_cert_path && v->tls.key_path &&
184 !strcmp(v->tls.alloc_cert_path, certpath) &&
185 !strcmp(v->tls.key_path, keypath)) {
186 lws_tls_server_certs_load(v, &wsi, certpath, keypath,
187 mem_cert, len_mem_cert,
188 mem_privkey, len_mem_privkey);
189
190 if (v->tls.skipped_certs)
191 lwsl_notice("%s: vhost %s: cert unset\n",
192 __func__, v->name);
193 }
194 } lws_end_foreach_ll(v, vhost_next);
195
196 return 0;
197 }
198 #endif
199
200 int
lws_gate_accepts(struct lws_context * context,int on)201 lws_gate_accepts(struct lws_context *context, int on)
202 {
203 struct lws_vhost *v = context->vhost_list;
204
205 lwsl_notice("%s: on = %d\n", __func__, on);
206
207 while (v) {
208 if (v->tls.use_ssl && v->lserv_wsi &&
209 lws_change_pollfd(v->lserv_wsi, (LWS_POLLIN) * !on,
210 (LWS_POLLIN) * on))
211 lwsl_notice("Unable to set accept POLLIN %d\n", on);
212
213 v = v->vhost_next;
214 }
215
216 return 0;
217 }
218
219 /* comma-separated alpn list, like "h2,http/1.1" to openssl alpn format */
220
221 int
lws_alpn_comma_to_openssl(const char * comma,uint8_t * os,int len)222 lws_alpn_comma_to_openssl(const char *comma, uint8_t *os, int len)
223 {
224 uint8_t *oos = os, *plen = NULL;
225
226 if (!comma)
227 return 0;
228
229 while (*comma && len > 2) {
230 if (!plen && *comma == ' ') {
231 comma++;
232 continue;
233 }
234 if (!plen) {
235 plen = os++;
236 len--;
237 }
238
239 if (*comma == ',') {
240 *plen = (uint8_t)lws_ptr_diff(os, plen + 1);
241 plen = NULL;
242 comma++;
243 } else {
244 *os++ = (uint8_t)*comma++;
245 len--;
246 }
247 }
248
249 if (plen)
250 *plen = (uint8_t)lws_ptr_diff(os, plen + 1);
251
252 *os = 0;
253
254 return lws_ptr_diff(os, oos);
255 }
256
257
258
259