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
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* _ _
* _ __ ___ ___ __| | ___ ___| | mod_ssl
* | '_ ` _ \ / _ \ / _` | / __/ __| | Apache Interface to OpenSSL
* | | | | | | (_) | (_| | \__ \__ \ |
* |_| |_| |_|\___/ \__,_|___|___/___/_|
* |_____|
* ssl_scache.c
* Session Cache Abstraction
*/
/* ``Open-Source Software: generous
programmers from around the world all
join forces to help you shoot
yourself in the foot for free.''
-- Unknown */
#include "ssl_private.h"
#include "mod_status.h"
/* _________________________________________________________________
**
** Session Cache: Common Abstraction Layer
** _________________________________________________________________
*/
apr_status_t ssl_scache_init(server_rec *s, apr_pool_t *p)
{
SSLModConfigRec *mc = myModConfig(s);
apr_status_t rv;
struct ap_socache_hints hints;
/* The very first invocation of this function will be the
* post_config invocation during server startup; do nothing for
* this first (and only the first) time through, since the pool
* will be immediately cleared anyway. For every subsequent
* invocation, initialize the configured cache. */
if (ap_state_query(AP_SQ_MAIN_STATE) == AP_SQ_MS_CREATE_PRE_CONFIG)
return APR_SUCCESS;
#ifdef HAVE_OCSP_STAPLING
if (mc->stapling_cache) {
memset(&hints, 0, sizeof hints);
hints.avg_obj_size = 1500;
hints.avg_id_len = 20;
hints.expiry_interval = 300;
rv = mc->stapling_cache->init(mc->stapling_cache_context,
"mod_ssl-stapling", &hints, s, p);
if (rv) {
ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01872)
"Could not initialize stapling cache. Exiting.");
return ssl_die(s);
}
}
#endif
/*
* Warn the user that he should use the session cache.
* But we can operate without it, of course.
*/
if (mc->sesscache == NULL) {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(01873)
"Init: Session Cache is not configured "
"[hint: SSLSessionCache]");
return APR_SUCCESS;
}
memset(&hints, 0, sizeof hints);
hints.avg_obj_size = 150;
hints.avg_id_len = 30;
hints.expiry_interval = 30;
rv = mc->sesscache->init(mc->sesscache_context, "mod_ssl-session", &hints, s, p);
if (rv) {
ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01874)
"Could not initialize session cache. Exiting.");
return ssl_die(s);
}
return APR_SUCCESS;
}
void ssl_scache_kill(server_rec *s)
{
SSLModConfigRec *mc = myModConfig(s);
if (mc->sesscache) {
mc->sesscache->destroy(mc->sesscache_context, s);
}
#ifdef HAVE_OCSP_STAPLING
if (mc->stapling_cache) {
mc->stapling_cache->destroy(mc->stapling_cache_context, s);
}
#endif
}
BOOL ssl_scache_store(server_rec *s, IDCONST UCHAR *id, int idlen,
apr_time_t expiry, SSL_SESSION *sess,
apr_pool_t *p)
{
SSLModConfigRec *mc = myModConfig(s);
unsigned char encoded[MODSSL_SESSION_MAX_DER], *ptr;
unsigned int len;
apr_status_t rv;
/* Serialise the session. */
len = i2d_SSL_SESSION(sess, NULL);
if (len > sizeof encoded) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(01875)
"session is too big (%u bytes)", len);
return FALSE;
}
ptr = encoded;
len = i2d_SSL_SESSION(sess, &ptr);
if (mc->sesscache->flags & AP_SOCACHE_FLAG_NOTMPSAFE) {
ssl_mutex_on(s);
}
rv = mc->sesscache->store(mc->sesscache_context, s, id, idlen,
expiry, encoded, len, p);
if (mc->sesscache->flags & AP_SOCACHE_FLAG_NOTMPSAFE) {
ssl_mutex_off(s);
}
return rv == APR_SUCCESS ? TRUE : FALSE;
}
SSL_SESSION *ssl_scache_retrieve(server_rec *s, IDCONST UCHAR *id, int idlen,
apr_pool_t *p)
{
SSLModConfigRec *mc = myModConfig(s);
unsigned char dest[MODSSL_SESSION_MAX_DER];
unsigned int destlen = MODSSL_SESSION_MAX_DER;
const unsigned char *ptr;
apr_status_t rv;
if (mc->sesscache->flags & AP_SOCACHE_FLAG_NOTMPSAFE) {
ssl_mutex_on(s);
}
rv = mc->sesscache->retrieve(mc->sesscache_context, s, id, idlen,
dest, &destlen, p);
if (mc->sesscache->flags & AP_SOCACHE_FLAG_NOTMPSAFE) {
ssl_mutex_off(s);
}
if (rv != APR_SUCCESS) {
return NULL;
}
ptr = dest;
return d2i_SSL_SESSION(NULL, &ptr, destlen);
}
void ssl_scache_remove(server_rec *s, IDCONST UCHAR *id, int idlen,
apr_pool_t *p)
{
SSLModConfigRec *mc = myModConfig(s);
if (mc->sesscache->flags & AP_SOCACHE_FLAG_NOTMPSAFE) {
ssl_mutex_on(s);
}
mc->sesscache->remove(mc->sesscache_context, s, id, idlen, p);
if (mc->sesscache->flags & AP_SOCACHE_FLAG_NOTMPSAFE) {
ssl_mutex_off(s);
}
}
/* _________________________________________________________________
**
** SSL Extension to mod_status
** _________________________________________________________________
*/
static int ssl_ext_status_hook(request_rec *r, int flags)
{
SSLModConfigRec *mc = myModConfig(r->server);
if (mc == NULL || mc->sesscache == NULL)
return OK;
if (!(flags & AP_STATUS_SHORT)) {
ap_rputs("<hr>\n", r);
ap_rputs("<table cellspacing=0 cellpadding=0>\n", r);
ap_rputs("<tr><td bgcolor=\"#000000\">\n", r);
ap_rputs("<b><font color=\"#ffffff\" face=\"Arial,Helvetica\">SSL/TLS Session Cache Status:</font></b>\r", r);
ap_rputs("</td></tr>\n", r);
ap_rputs("<tr><td bgcolor=\"#ffffff\">\n", r);
}
else {
ap_rputs("TLSSessionCacheStatus\n", r);
}
if (mc->sesscache->flags & AP_SOCACHE_FLAG_NOTMPSAFE) {
ssl_mutex_on(r->server);
}
mc->sesscache->status(mc->sesscache_context, r, flags);
if (mc->sesscache->flags & AP_SOCACHE_FLAG_NOTMPSAFE) {
ssl_mutex_off(r->server);
}
if (!(flags & AP_STATUS_SHORT)) {
ap_rputs("</td></tr>\n", r);
ap_rputs("</table>\n", r);
}
return OK;
}
void ssl_scache_status_register(apr_pool_t *p)
{
APR_OPTIONAL_HOOK(ap, status_hook, ssl_ext_status_hook, NULL, NULL,
APR_HOOK_MIDDLE);
}
|
