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Diffstat (limited to 'modules/ssl/ssl_scache.c')
| -rw-r--r-- | modules/ssl/ssl_scache.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/modules/ssl/ssl_scache.c b/modules/ssl/ssl_scache.c new file mode 100644 index 0000000..c0a0950 --- /dev/null +++ b/modules/ssl/ssl_scache.c @@ -0,0 +1,239 @@ +/* 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-staple", &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-sess", &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); +} + |