2019-07-28 10:31:56 +08:00
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#include "StdAfx.h"
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2014-11-19 00:25:21 +08:00
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#include <sys/stat.h>
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#include <stdlib.h>
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#ifdef ACL_UNIX
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# include <unistd.h>
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# include <sys/time.h> /* gettimeofday, not POSIX */
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#elif defined(WIN32)
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# include <process.h>
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#endif
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#include <ctype.h>
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#include <errno.h>
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#include <string.h>
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#include <limits.h>
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/* OpenSSL library. */
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#ifdef USE_TLS
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#include <openssl/rand.h> /* For the PRNG */
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#endif
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#include "../attr/attr.h"
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#ifndef UCHAR_MAX
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#define UCHAR_MAX 0xff
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#endif
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/* TLS library. */
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#ifdef USE_TLS
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#include "tls.h" /* TLS_MGR_SCACHE_<type> */
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#include "tls_private.h"
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#include "tls_mgr.h"
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#include "tls_prng.h"
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#include "tls_scache.h"
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#include "tls_params.h"
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/* Application-specific. */
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/*
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* Tunables.
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*/
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char *var_tls_rand_source;
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int var_tls_rand_bytes;
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int var_tls_reseed_period;
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int var_tls_prng_exch_period;
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int var_server_tls_loglevel;
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char *var_server_tls_scache_db;
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int var_server_tls_scache_timeout;
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int var_client_tls_loglevel;
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char *var_client_tls_scache_db;
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int var_client_tls_scache_timeout;
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char *var_tls_rand_exch_name;
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int var_tlsmgr_stand_alone = 0;
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/*
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* Bound the time that we are willing to wait for an I/O operation. This
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* produces better error messages than waiting until the watchdog timer
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* kills the process.
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*/
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#define TLS_MGR_TIMEOUT 10
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/*
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* State for updating the PRNG exchange file.
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*/
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static TLS_PRNG_SRC *rand_exch;
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/*
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* State for seeding the internal PRNG from external source.
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*/
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static TLS_PRNG_SRC *rand_source_dev;
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static TLS_PRNG_SRC *rand_source_egd;
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static TLS_PRNG_SRC *rand_source_file;
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/*
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* The external entropy source type is encoded in the source name. The
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* obvious alternative is to have separate configuration parameters per
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* source type, so that one process can query multiple external sources.
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*/
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#define DEV_PREF "dev:"
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#define DEV_PREF_LEN (sizeof((DEV_PREF)) - 1)
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#define DEV_PATH(dev) ((dev) + EGD_PREF_LEN)
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#define EGD_PREF "egd:"
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#define EGD_PREF_LEN (sizeof((EGD_PREF)) - 1)
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#define EGD_PATH(egd) ((egd) + EGD_PREF_LEN)
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/*
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* State for TLS session caches.
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*/
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typedef struct {
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char *cache_label; /* cache short-hand name */
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TLS_SCACHE *cache_info; /* cache handle */
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int cache_active; /* cache status */
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char **cache_db; /* main.cf parameter value */
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int *cache_loglevel; /* main.cf parameter value */
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int *cache_timeout; /* main.cf parameter value */
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} TLSMGR_SCACHE;
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TLSMGR_SCACHE cache_table[] = {
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{ TLS_MGR_SCACHE_SERVER, 0, 0, &var_server_tls_scache_db,
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&var_server_tls_loglevel, &var_server_tls_scache_timeout },
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{ TLS_MGR_SCACHE_CLIENT, 0, 0, &var_client_tls_scache_db,
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&var_client_tls_loglevel, &var_client_tls_scache_timeout },
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{ 0, 0, 0, 0, 0, 0 },
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};
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static ACL_EVENT *__eventp;
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/*
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* SLMs.
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*/
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#define STR(x) acl_vstring_str(x)
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#define LEN(x) ACL_VSTRING_LEN(x)
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#define STREQ(x, y) (strcmp((x), (y)) == 0)
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/* tlsmgr_prng_exch_event - update PRNG exchange file */
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static void tlsmgr_prng_exch_event(int event_type acl_unused,
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ACL_EVENT *event acl_unused, void *dummy)
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{
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const char *myname = "tlsmgr_prng_exch_event";
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unsigned char randbyte;
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int next_period;
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struct acl_stat st;
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if (acl_msg_verbose)
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acl_msg_info("%s: update PRNG exchange file", myname);
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/*
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* Sanity check. If the PRNG exchange file was removed, there is no point
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* updating it further. Restart the process and update the new file.
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*/
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if (acl_fstat(rand_exch->fd.file, &st) < 0)
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acl_msg_fatal("%s: cannot fstat() the PRNG exchange file: %s", myname, acl_last_serror());
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if (st.st_nlink == 0) {
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acl_msg_warn("%s: PRNG exchange file was removed -- exiting to reopen", myname);
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sleep(1);
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exit(0);
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}
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tls_prng_exch_update(rand_exch);
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/*
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* Make prediction difficult for outsiders and calculate the time for the
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* next execution randomly.
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*/
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RAND_bytes(&randbyte, 1);
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next_period = (var_tls_prng_exch_period * randbyte) / UCHAR_MAX;
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acl_event_request_timer(__eventp, tlsmgr_prng_exch_event, dummy, next_period, 0);
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}
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/* tlsmgr_reseed_event - re-seed the internal PRNG pool */
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static void tlsmgr_reseed_event(int event_type acl_unused,
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ACL_EVENT *event acl_unused, void *dummy)
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{
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const char *myname = "tlsmgr_reseed_event";
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int next_period;
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unsigned char randbyte;
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int must_exit = 0;
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/*
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* Reseed the internal PRNG from external source. Errors are recoverable.
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* We simply restart and reconnect without making a fuss. This is OK
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* because we do require that exchange file updates succeed. The exchange
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* file is the only entropy source that really matters in the long term.
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*
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* If the administrator specifies an external randomness source that we
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* could not open upon start-up, restart to see if we can open it now
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* (and log a nagging warning if we can't).
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*/
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if (*var_tls_rand_source) {
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/*
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* Source is a random device.
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*/
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if (rand_source_dev) {
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if (tls_prng_dev_read(rand_source_dev, var_tls_rand_bytes) <= 0) {
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acl_msg_info("%s: cannot read from entropy device %s: %s -- "
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"exiting to reopen", myname, DEV_PATH(var_tls_rand_source),
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acl_last_serror());
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must_exit = 1;
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}
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}
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/*
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* Source is an EGD compatible socket.
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*/
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else if (rand_source_egd) {
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if (tls_prng_egd_read(rand_source_egd, var_tls_rand_bytes) <= 0) {
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acl_msg_info("%s: lost connection to EGD server %s -- "
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"exiting to reconnect", myname, EGD_PATH(var_tls_rand_source));
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must_exit = 1;
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}
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}
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/*
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* Source is a regular file. Read the content once and close the
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* file.
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*/
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else if (rand_source_file) {
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if (tls_prng_file_read(rand_source_file, var_tls_rand_bytes) <= 0)
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acl_msg_warn("%s: cannot read from entropy file %s: %s",
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myname, var_tls_rand_source, acl_last_serror());
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tls_prng_file_close(rand_source_file);
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rand_source_file = 0;
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var_tls_rand_source[0] = 0;
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}
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/*
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* Could not open the external source upon start-up. See if we can
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* open it this time. Save PRNG state before we exit.
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*/
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else {
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acl_msg_info("exiting to reopen external entropy source %s",
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var_tls_rand_source);
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must_exit = 1;
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}
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}
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/*
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* Save PRNG state in case we must exit.
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*/
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if (must_exit) {
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if (rand_exch)
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tls_prng_exch_update(rand_exch);
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sleep(1);
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acl_msg_info("exit now");
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exit(0);
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}
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/*
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* Make prediction difficult for outsiders and calculate the time for the
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* next execution randomly.
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*/
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RAND_bytes(&randbyte, 1);
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next_period = (var_tls_reseed_period * randbyte) / UCHAR_MAX;
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acl_event_request_timer(__eventp, tlsmgr_reseed_event, dummy, next_period, 0);
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}
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/* tlsmgr_cache_run_event - start TLS session cache scan */
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static void tlsmgr_cache_run_event(int event_type acl_unused,
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ACL_EVENT *event acl_unused, void *ctx)
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{
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const char *myname = "tlsmgr_cache_run_event";
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TLSMGR_SCACHE *cache = (TLSMGR_SCACHE *) ctx;
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/*
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* This routine runs when it is time for another TLS session cache scan.
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* Make sure this routine gets called again in the future.
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*
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* Don't start a new scan when the timer goes off while cache cleanup is
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* still in progress.
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*/
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if (cache->cache_info->verbose)
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acl_msg_info("%s: start TLS %s session cache cleanup",
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myname, cache->cache_label);
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if (cache->cache_active == 0)
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cache->cache_active =
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tls_scache_sequence(cache->cache_info, DICT_SEQ_FUN_FIRST,
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TLS_SCACHE_SEQUENCE_NOTHING);
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acl_event_request_timer(__eventp, tlsmgr_cache_run_event, (char *) cache,
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cache->cache_info->timeout, 0);
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}
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/* tlsmgr_loop - TLS manager main loop */
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static int tlsmgr_loop(char *unused_name acl_unused, char **unused_argv acl_unused)
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{
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struct timeval tv;
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int active = 0;
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TLSMGR_SCACHE *ent;
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/*
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* Update the PRNG pool with the time of day. We do it here after every
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* event (including internal timer events and external client request
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* events), instead of doing it in individual event call-back routines.
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*/
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gettimeofday(&tv, 0);
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RAND_seed(&tv, sizeof(struct timeval));
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/*
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* This routine runs as part of the event handling loop, after the event
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* manager has delivered a timer or I/O event, or after it has waited for
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* a specified amount of time. The result value of tlsmgr_loop()
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* specifies how long the event manager should wait for the next event.
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*
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* We use this loop to interleave TLS session cache cleanup with other
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* activity. Interleaved processing is needed when we use a client-server
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* protocol for entropy and session state exchange with client(8) and
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* server(8) processes.
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*/
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#define DONT_WAIT 0
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#define WAIT_FOR_EVENT (-1)
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for (ent = cache_table; ent->cache_label; ++ent) {
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if (ent->cache_info && ent->cache_active)
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active |= ent->cache_active =
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tls_scache_sequence(ent->cache_info, DICT_SEQ_FUN_NEXT,
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TLS_SCACHE_SEQUENCE_NOTHING);
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}
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return (active ? DONT_WAIT : WAIT_FOR_EVENT);
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}
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/* tlsmgr_request_receive - receive request */
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static int tlsmgr_request_receive(ACL_VSTREAM *client_stream, ACL_VSTRING *request)
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{
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const char *myname = "tlsmgr_request_receive";
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int count;
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/*
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* Kluge: choose the protocol depending on the request size.
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*/
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if (acl_read_wait(ACL_VSTREAM_SOCK(client_stream), var_ipc_timeout) < 0) {
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acl_msg_warn("%s: timeout while waiting for data from %s",
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myname, ACL_VSTREAM_PATH(client_stream));
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return (-1);
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}
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if ((count = acl_peekfd(ACL_VSTREAM_SOCK(client_stream))) < 0) {
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acl_msg_warn("%s: cannot examine read buffer of %s: %s",
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myname, ACL_VSTREAM_PATH(client_stream), acl_last_serror());
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return (-1);
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}
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/*
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* Short request: master trigger. Use the string+null protocol.
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*/
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if (count <= 2) {
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if (acl_vstring_gets_null(request, client_stream) == ACL_VSTREAM_EOF) {
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acl_msg_warn("%s: end-of-input while reading request from %s: %s",
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myname, ACL_VSTREAM_PATH(client_stream), acl_last_serror());
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return (-1);
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}
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}
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/*
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* Long request: real tlsmgr client. Use the attribute list protocol.
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*/
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else {
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if (attr_scan(client_stream,
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ATTR_FLAG_MORE | ATTR_FLAG_STRICT,
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ATTR_TYPE_STR, TLS_MGR_ATTR_REQ, request,
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ATTR_TYPE_END) != 1) {
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return (-1);
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}
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}
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return (0);
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}
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/* tlsmgr_service - respond to external request */
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static void tlsmgr_service(ACL_VSTREAM *client_stream,
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char *unused_service acl_unused, char **argv acl_unused)
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{
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const char *myname = "tlsmgr_service";
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static ACL_VSTRING *request = 0;
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static ACL_VSTRING *cache_type = 0;
|
|
|
|
static ACL_VSTRING *cache_id = 0;
|
|
|
|
static ACL_VSTRING *buffer = 0;
|
|
|
|
int len;
|
|
|
|
static char wakeup[] = { /* master wakeup request */
|
|
|
|
TRIGGER_REQ_WAKEUP,
|
|
|
|
0,
|
|
|
|
};
|
|
|
|
TLSMGR_SCACHE *ent;
|
|
|
|
int status = TLS_MGR_STAT_FAIL;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Sanity check. This service takes no command-line arguments.
|
|
|
|
*/
|
|
|
|
if (var_tlsmgr_stand_alone && argv[0])
|
|
|
|
acl_msg_fatal("unexpected command-line argument: %s", argv[0]);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Initialize. We're select threaded, so we can use static buffers.
|
|
|
|
*/
|
|
|
|
if (request == 0) {
|
|
|
|
request = acl_vstring_alloc(10);
|
|
|
|
cache_type = acl_vstring_alloc(10);
|
|
|
|
cache_id = acl_vstring_alloc(10);
|
|
|
|
buffer = acl_vstring_alloc(10);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This routine runs whenever a client connects to the socket dedicated
|
|
|
|
* to the tlsmgr service (including wake up events sent by the master).
|
|
|
|
* All connection-management stuff is handled by the common code in
|
|
|
|
* multi_server.c.
|
|
|
|
*/
|
|
|
|
if (tlsmgr_request_receive(client_stream, request) == 0) {
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Load session from cache.
|
|
|
|
*/
|
|
|
|
if (STREQ(STR(request), TLS_MGR_REQ_LOOKUP)) {
|
|
|
|
if (attr_scan(client_stream, ATTR_FLAG_STRICT,
|
|
|
|
ATTR_TYPE_STR, TLS_MGR_ATTR_CACHE_TYPE, cache_type,
|
|
|
|
ATTR_TYPE_STR, TLS_MGR_ATTR_CACHE_ID, cache_id,
|
|
|
|
ATTR_TYPE_END) == 2) {
|
|
|
|
for (ent = cache_table; ent->cache_label; ++ent)
|
|
|
|
if (strcmp(ent->cache_label, STR(cache_type)) == 0)
|
|
|
|
break;
|
|
|
|
if (ent->cache_label == 0) {
|
|
|
|
acl_msg_warn("%s: bogus cache type \"%s\" in \"%s\" request",
|
|
|
|
myname, STR(cache_type), TLS_MGR_REQ_LOOKUP);
|
|
|
|
ACL_VSTRING_RESET(buffer);
|
|
|
|
} else if (ent->cache_info == 0) {
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Cache type valid, but not enabled
|
|
|
|
*/
|
|
|
|
ACL_VSTRING_RESET(buffer);
|
|
|
|
} else {
|
|
|
|
status = tls_scache_lookup(ent->cache_info,
|
|
|
|
STR(cache_id), buffer) ?
|
|
|
|
TLS_MGR_STAT_OK : TLS_MGR_STAT_ERR;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
attr_print(client_stream, ATTR_FLAG_NONE,
|
|
|
|
ATTR_TYPE_INT, TLS_ATTR_STATUS, status,
|
|
|
|
ATTR_TYPE_DATA, TLS_MGR_ATTR_SESSION,
|
|
|
|
LEN(buffer), STR(buffer),
|
|
|
|
ATTR_TYPE_END);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Save session to cache.
|
|
|
|
*/
|
|
|
|
else if (STREQ(STR(request), TLS_MGR_REQ_UPDATE)) {
|
|
|
|
if (attr_scan(client_stream, ATTR_FLAG_STRICT,
|
|
|
|
ATTR_TYPE_STR, TLS_MGR_ATTR_CACHE_TYPE, cache_type,
|
|
|
|
ATTR_TYPE_STR, TLS_MGR_ATTR_CACHE_ID, cache_id,
|
|
|
|
ATTR_TYPE_DATA, TLS_MGR_ATTR_SESSION, buffer,
|
|
|
|
ATTR_TYPE_END) == 3) {
|
|
|
|
for (ent = cache_table; ent->cache_label; ++ent)
|
|
|
|
if (strcmp(ent->cache_label, STR(cache_type)) == 0)
|
|
|
|
break;
|
|
|
|
if (ent->cache_label == 0) {
|
|
|
|
acl_msg_warn("%s: bogus cache type \"%s\" in \"%s\" request",
|
|
|
|
myname, STR(cache_type), TLS_MGR_REQ_UPDATE);
|
|
|
|
} else if (ent->cache_info != 0) {
|
|
|
|
status = 0;
|
|
|
|
tls_scache_update(ent->cache_info, STR(cache_id),
|
|
|
|
STR(buffer), LEN(buffer)) ?
|
|
|
|
TLS_MGR_STAT_OK : TLS_MGR_STAT_ERR;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
attr_print(client_stream, ATTR_FLAG_NONE,
|
|
|
|
ATTR_TYPE_INT, TLS_ATTR_STATUS, status,
|
|
|
|
ATTR_TYPE_END);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Delete session from cache.
|
|
|
|
*/
|
|
|
|
else if (STREQ(STR(request), TLS_MGR_REQ_DELETE)) {
|
|
|
|
if (attr_scan(client_stream, ATTR_FLAG_STRICT,
|
|
|
|
ATTR_TYPE_STR, TLS_MGR_ATTR_CACHE_TYPE, cache_type,
|
|
|
|
ATTR_TYPE_STR, TLS_MGR_ATTR_CACHE_ID, cache_id,
|
|
|
|
ATTR_TYPE_END) == 2) {
|
|
|
|
for (ent = cache_table; ent->cache_label; ++ent)
|
|
|
|
if (strcmp(ent->cache_label, STR(cache_type)) == 0)
|
|
|
|
break;
|
|
|
|
if (ent->cache_label == 0) {
|
|
|
|
acl_msg_warn("%s: bogus cache type \"%s\" in \"%s\" request",
|
|
|
|
myname, STR(cache_type), TLS_MGR_REQ_DELETE);
|
|
|
|
} else if (ent->cache_info != 0) {
|
|
|
|
status = tls_scache_delete(ent->cache_info,
|
|
|
|
STR(cache_id)) ?
|
|
|
|
TLS_MGR_STAT_OK : TLS_MGR_STAT_ERR;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
attr_print(client_stream, ATTR_FLAG_NONE,
|
|
|
|
ATTR_TYPE_INT, TLS_ATTR_STATUS, status,
|
|
|
|
ATTR_TYPE_END);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Entropy request.
|
|
|
|
*/
|
|
|
|
else if (STREQ(STR(request), TLS_MGR_REQ_SEED)) {
|
|
|
|
if (attr_scan(client_stream, ATTR_FLAG_STRICT,
|
|
|
|
ATTR_TYPE_INT, TLS_MGR_ATTR_SIZE, &len,
|
|
|
|
ATTR_TYPE_END) == 1) {
|
|
|
|
ACL_VSTRING_RESET(buffer);
|
|
|
|
if (len <= 0 || len > 255) {
|
|
|
|
acl_msg_warn("%s: bogus seed length \"%d\" in \"%s\" request",
|
|
|
|
myname, len, TLS_MGR_REQ_SEED);
|
|
|
|
} else {
|
|
|
|
ACL_VSTRING_SPACE(buffer, len);
|
|
|
|
RAND_bytes((unsigned char *) STR(buffer), len);
|
|
|
|
ACL_VSTRING_AT_OFFSET(buffer, len); /* XXX not part of the
|
|
|
|
* official interface */
|
|
|
|
status = TLS_MGR_STAT_OK;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
attr_print(client_stream, ATTR_FLAG_NONE,
|
|
|
|
ATTR_TYPE_INT, TLS_ATTR_STATUS, status,
|
|
|
|
ATTR_TYPE_DATA, TLS_MGR_ATTR_SEED,
|
|
|
|
LEN(buffer), STR(buffer),
|
|
|
|
ATTR_TYPE_END);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Caching policy request.
|
|
|
|
*/
|
|
|
|
else if (STREQ(STR(request), TLS_MGR_REQ_POLICY)) {
|
|
|
|
int cachable = 0;
|
|
|
|
|
|
|
|
if (attr_scan(client_stream, ATTR_FLAG_STRICT,
|
|
|
|
ATTR_TYPE_STR, TLS_MGR_ATTR_CACHE_TYPE, cache_type,
|
|
|
|
ATTR_TYPE_END) == 1) {
|
|
|
|
for (ent = cache_table; ent->cache_label; ++ent)
|
|
|
|
if (strcmp(ent->cache_label, STR(cache_type)) == 0)
|
|
|
|
break;
|
|
|
|
if (ent->cache_label == 0) {
|
|
|
|
acl_msg_warn("%s: bogus cache type \"%s\" in \"%s\" request",
|
|
|
|
myname, STR(cache_type), TLS_MGR_REQ_POLICY);
|
|
|
|
} else {
|
|
|
|
cachable = (ent->cache_info != 0) ? 1 : 0;
|
|
|
|
status = TLS_MGR_STAT_OK;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
attr_print(client_stream, ATTR_FLAG_NONE,
|
|
|
|
ATTR_TYPE_INT, TLS_ATTR_STATUS, status,
|
|
|
|
ATTR_TYPE_INT, TLS_MGR_ATTR_CACHABLE, cachable,
|
|
|
|
ATTR_TYPE_END);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Master trigger. Normally, these triggers arrive only after some
|
|
|
|
* other process requested the tlsmgr's service. The purpose is to
|
|
|
|
* restart the tlsmgr after it aborted due to a fatal run-time error,
|
|
|
|
* so that it can continue its housekeeping even while nothing is
|
|
|
|
* using TLS.
|
|
|
|
*
|
|
|
|
* XXX Which begs the question, if TLS isn't used often, do we need a
|
|
|
|
* tlsmgr background process? It could terminate when the session
|
|
|
|
* caches are empty.
|
|
|
|
*/
|
|
|
|
else if (var_tlsmgr_stand_alone && STREQ(STR(request), wakeup)) {
|
|
|
|
if (acl_msg_verbose)
|
|
|
|
acl_msg_info("received master trigger");
|
|
|
|
#ifdef ACL_UNIX
|
|
|
|
acl_multi_server_disconnect(client_stream);
|
|
|
|
#endif
|
|
|
|
return; /* NOT: acl_vstream_fflush */
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* protocol error
|
|
|
|
*/
|
|
|
|
else {
|
|
|
|
attr_print(client_stream, ATTR_FLAG_NONE,
|
|
|
|
ATTR_TYPE_INT, TLS_ATTR_STATUS, TLS_MGR_STAT_FAIL,
|
|
|
|
ATTR_TYPE_END);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Protocol error.
|
|
|
|
*/
|
|
|
|
else {
|
|
|
|
attr_print(client_stream, ATTR_FLAG_NONE,
|
|
|
|
ATTR_TYPE_INT, TLS_ATTR_STATUS, TLS_MGR_STAT_FAIL,
|
|
|
|
ATTR_TYPE_END);
|
|
|
|
}
|
|
|
|
acl_vstream_fflush(client_stream);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* tlsmgr_pre_init - pre-jail initialization */
|
|
|
|
|
|
|
|
static void tlsmgr_pre_init(char *unused_name acl_unused, char **unused_argv acl_unused)
|
|
|
|
{
|
|
|
|
const char *myname = "tlsmgr_pre_init";
|
|
|
|
char *path;
|
|
|
|
struct timeval tv;
|
|
|
|
TLSMGR_SCACHE *ent;
|
|
|
|
ACL_HTABLE *dup_filter;
|
|
|
|
const char *dup_label;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If nothing else works then at least this will get us a few bits of
|
|
|
|
* entropy.
|
|
|
|
*
|
|
|
|
* XXX This is our first call into the OpenSSL library. We should find out
|
|
|
|
* if this can be moved to the post-jail initialization phase, without
|
|
|
|
* breaking compatibility with existing installations.
|
|
|
|
*/
|
|
|
|
#ifdef WIN32
|
|
|
|
# define getpid _getpid
|
|
|
|
#endif
|
|
|
|
gettimeofday(&tv, 0);
|
|
|
|
tv.tv_sec ^= getpid();
|
|
|
|
RAND_seed(&tv, sizeof(struct timeval));
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Open the external entropy source. We will not be able to open it again
|
|
|
|
* after we are sent to chroot jail, so we keep it open. Errors are not
|
|
|
|
* fatal. The exchange file (see below) is the only entropy source that
|
|
|
|
* really matters in the long run.
|
|
|
|
*
|
|
|
|
* Security note: we open the entropy source while privileged, but we don't
|
|
|
|
* access the source until after we release privileges. This way, none of
|
|
|
|
* the OpenSSL code gets to execute while we are privileged.
|
|
|
|
*/
|
|
|
|
if (*var_tls_rand_source) {
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Source is a random device.
|
|
|
|
*/
|
|
|
|
if (!strncmp(var_tls_rand_source, DEV_PREF, DEV_PREF_LEN)) {
|
|
|
|
path = DEV_PATH(var_tls_rand_source);
|
|
|
|
rand_source_dev = tls_prng_dev_open(path, TLS_MGR_TIMEOUT);
|
|
|
|
if (rand_source_dev == 0)
|
|
|
|
acl_msg_warn("%s: cannot open entropy device %s: %s",
|
|
|
|
myname, path, acl_last_serror());
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Source is an EGD compatible socket.
|
|
|
|
*/
|
|
|
|
else if (!strncmp(var_tls_rand_source, EGD_PREF, EGD_PREF_LEN)) {
|
|
|
|
path = EGD_PATH(var_tls_rand_source);
|
|
|
|
rand_source_egd = tls_prng_egd_open(path, TLS_MGR_TIMEOUT);
|
|
|
|
if (rand_source_egd == 0)
|
|
|
|
acl_msg_warn("%s: cannot connect to EGD server %s: %s",
|
|
|
|
myname, path, acl_last_serror());
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Source is regular file. We read this only once.
|
|
|
|
*/
|
|
|
|
else {
|
|
|
|
rand_source_file =
|
|
|
|
tls_prng_file_open(var_tls_rand_source, TLS_MGR_TIMEOUT);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
acl_msg_warn("%s: no entropy source specified with parameter %s",
|
|
|
|
myname, VAR_TLS_RAND_SOURCE);
|
|
|
|
acl_msg_warn("%s: encryption keys etc. may be predictable", myname);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Open the PRNG exchange file before going to jail, but don't use root
|
|
|
|
* privileges. Start the exchange file read/update pseudo thread after
|
|
|
|
* dropping privileges.
|
|
|
|
*/
|
|
|
|
if (*var_tls_rand_exch_name) {
|
|
|
|
rand_exch = tls_prng_exch_open(var_tls_rand_exch_name);
|
|
|
|
if (rand_exch == 0)
|
|
|
|
acl_msg_fatal("cannot open PRNG exchange file %s: %s",
|
|
|
|
var_tls_rand_exch_name, acl_last_serror());
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Open the session cache files and discard old information before going
|
|
|
|
* to jail, but don't use root privilege. Start the cache maintenance
|
|
|
|
* pseudo threads after dropping privileges.
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (!var_tlsmgr_stand_alone)
|
|
|
|
tls_scache_init();
|
|
|
|
|
|
|
|
dup_filter = acl_htable_create(sizeof(cache_table) / sizeof(cache_table[0]), 0);
|
|
|
|
for (ent = cache_table; ent->cache_label; ++ent) {
|
|
|
|
if (**ent->cache_db) {
|
|
|
|
if ((dup_label = acl_htable_find(dup_filter, *ent->cache_db)) != 0)
|
|
|
|
acl_msg_fatal("do not use the same TLS cache file %s for %s and %s",
|
|
|
|
*ent->cache_db, dup_label, ent->cache_label);
|
|
|
|
acl_htable_enter(dup_filter, *ent->cache_db, ent->cache_label);
|
|
|
|
ent->cache_info = tls_scache_open(*ent->cache_db,
|
|
|
|
ent->cache_label,
|
|
|
|
*ent->cache_loglevel >= 2,
|
|
|
|
*ent->cache_timeout);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
acl_htable_free(dup_filter, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* tlsmgr_post_init - post-jail initialization */
|
|
|
|
|
|
|
|
static void tlsmgr_post_init(char *unused_name acl_unused,
|
|
|
|
char **unused_argv acl_unused)
|
|
|
|
{
|
|
|
|
const char *myname = "tlsmgr_post_init";
|
|
|
|
TLSMGR_SCACHE *ent;
|
|
|
|
|
|
|
|
#define NULL_EVENT (0)
|
|
|
|
#define NULL_CONTEXT ((char *) 0)
|
|
|
|
|
|
|
|
#ifdef ACL_UNIX
|
|
|
|
if (var_tlsmgr_stand_alone)
|
|
|
|
__eventp = acl_multi_server_event();
|
|
|
|
else
|
|
|
|
#endif
|
|
|
|
__eventp = acl_event_new_select(1, 0);
|
|
|
|
|
|
|
|
if (__eventp == NULL)
|
|
|
|
acl_msg_fatal("%s: __eventp null", myname);
|
|
|
|
|
|
|
|
if (var_tlsmgr_stand_alone) {
|
|
|
|
/*
|
|
|
|
* This routine runs after the skeleton code has entered the chroot jail,
|
|
|
|
* but before any client requests are serviced. Prevent automatic process
|
|
|
|
* suicide after a limited number of client requests or after a limited
|
|
|
|
* amount of idle time.
|
|
|
|
*/
|
|
|
|
#ifdef ACL_UNIX
|
|
|
|
acl_var_multi_use_limit = 0;
|
|
|
|
acl_var_multi_idle_limit = 0;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Start the internal PRNG re-seeding pseudo thread first.
|
|
|
|
*/
|
|
|
|
if (*var_tls_rand_source) {
|
|
|
|
if (var_tls_reseed_period > INT_MAX / UCHAR_MAX)
|
|
|
|
var_tls_reseed_period = INT_MAX / UCHAR_MAX;
|
|
|
|
tlsmgr_reseed_event(NULL_EVENT, NULL, NULL_CONTEXT);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Start the exchange file read/update pseudo thread.
|
|
|
|
*/
|
|
|
|
if (*var_tls_rand_exch_name) {
|
|
|
|
if (var_tls_prng_exch_period > INT_MAX / UCHAR_MAX)
|
|
|
|
var_tls_prng_exch_period = INT_MAX / UCHAR_MAX;
|
|
|
|
tlsmgr_prng_exch_event(NULL_EVENT, NULL, NULL_CONTEXT);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Start the cache maintenance pseudo threads last. Strictly speaking
|
|
|
|
* there is nothing to clean up after we truncate the database to zero
|
|
|
|
* length, but early cleanup makes verbose logging more informative (we
|
|
|
|
* get positive confirmation that the cleanup threads are running).
|
|
|
|
*/
|
|
|
|
for (ent = cache_table; ent->cache_label; ++ent)
|
|
|
|
if (ent->cache_info)
|
|
|
|
tlsmgr_cache_run_event(NULL_EVENT, NULL, (char *) ent);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* tlsmgr_before_exit - save PRNG state before exit */
|
|
|
|
|
|
|
|
static void tlsmgr_before_exit(char *unused_service_name acl_unused,
|
|
|
|
char **unused_argv acl_unused)
|
|
|
|
{
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Save state before we exit after "postfix reload".
|
|
|
|
*/
|
|
|
|
if (rand_exch)
|
|
|
|
tls_prng_exch_update(rand_exch);
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef ACL_UNIX
|
|
|
|
|
|
|
|
void tlsmgr_alone_start(int argc, char *argv[])
|
|
|
|
{
|
|
|
|
static ACL_CONFIG_STR_TABLE str_table[] = {
|
|
|
|
{ VAR_TLS_RAND_SOURCE, DEF_TLS_RAND_SOURCE, &var_tls_rand_source },
|
|
|
|
{ VAR_TLS_RAND_EXCH_NAME, DEF_TLS_RAND_EXCH_NAME, &var_tls_rand_exch_name },
|
|
|
|
{ VAR_SERVER_TLS_SCACHE_DB, DEF_SERVER_TLS_SCACHE_DB, &var_server_tls_scache_db },
|
|
|
|
{ VAR_CLIENT_TLS_SCACHE_DB, DEF_CLIENT_TLS_SCACHE_DB, &var_client_tls_scache_db },
|
|
|
|
{ 0, 0, 0 },
|
|
|
|
};
|
|
|
|
static ACL_CONFIG_INT_TABLE int_table[] = {
|
|
|
|
{ VAR_TLS_RAND_BYTES, DEF_TLS_RAND_BYTES, &var_tls_rand_bytes, 1, 0 },
|
|
|
|
{ VAR_SERVER_TLS_LOGLEVEL, DEF_SERVER_TLS_LOGLEVEL, &var_server_tls_loglevel, 0, 0 },
|
|
|
|
{ VAR_CLIENT_TLS_LOGLEVEL, DEF_CLIENT_TLS_LOGLEVEL, &var_client_tls_loglevel, 0, 0 },
|
|
|
|
|
|
|
|
{ VAR_TLS_RESEED_PERIOD, DEF_TLS_RESEED_PERIOD, &var_tls_reseed_period, 1, 0 },
|
|
|
|
{ VAR_TLS_PRNG_UPD_PERIOD, DEF_TLS_PRNG_UPD_PERIOD, &var_tls_prng_exch_period, 1, 0 },
|
|
|
|
{ VAR_SERVER_TLS_SCACHTIME, DEF_SERVER_TLS_SCACHTIME, &var_server_tls_scache_timeout, 0, 0 },
|
|
|
|
{ VAR_CLIENT_TLS_SCACHTIME, DEF_CLIENT_TLS_SCACHTIME, &var_client_tls_scache_timeout, 0, 0 },
|
|
|
|
{ 0, 0, 0, 0, 0 },
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Use the multi service skeleton, and require that no-one else is
|
|
|
|
* monitoring our service port while this process runs.
|
|
|
|
*/
|
|
|
|
acl_multi_server_main(argc, argv, tlsmgr_service,
|
|
|
|
ACL_MASTER_SERVER_INT_TABLE, int_table,
|
|
|
|
ACL_MASTER_SERVER_STR_TABLE, str_table,
|
|
|
|
ACL_MASTER_SERVER_PRE_INIT, tlsmgr_pre_init,
|
|
|
|
ACL_MASTER_SERVER_POST_INIT, tlsmgr_post_init,
|
|
|
|
ACL_MASTER_SERVER_EXIT, tlsmgr_before_exit,
|
|
|
|
ACL_MASTER_SERVER_LOOP, tlsmgr_loop,
|
|
|
|
ACL_MASTER_SERVER_SOLITARY,
|
|
|
|
0);
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif /* ACL_UNIX */
|
|
|
|
|
|
|
|
static void client_ready_callback(int event_type acl_unused,
|
|
|
|
ACL_EVENT *event, ACL_VSTREAM *stream acl_unused, void *ctx)
|
|
|
|
{
|
|
|
|
ACL_VSTREAM *client_stream = (ACL_VSTREAM*) ctx;
|
|
|
|
|
|
|
|
tlsmgr_service(client_stream, NULL, NULL);
|
|
|
|
acl_event_enable_read(event, client_stream,
|
|
|
|
0, client_ready_callback, client_stream);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void listen_callback(int event_type acl_unused, ACL_EVENT *event,
|
|
|
|
ACL_VSTREAM *stream, void *ctx acl_unused)
|
|
|
|
{
|
|
|
|
const char *myname = "listen_callback";
|
|
|
|
ACL_VSTREAM *client_stream;
|
|
|
|
|
|
|
|
client_stream = acl_vstream_accept(stream, NULL, 0);
|
|
|
|
if (client_stream == NULL) {
|
|
|
|
acl_msg_warn("%s(%d): accept error(%s)",
|
|
|
|
myname, __LINE__, acl_last_serror());
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
acl_event_enable_read(event, client_stream,
|
|
|
|
0, client_ready_callback, client_stream);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void *tlsmgr_thread_main(void *arg)
|
|
|
|
{
|
|
|
|
ACL_VSTREAM *server_stream = (ACL_VSTREAM*) arg;
|
|
|
|
int delay_sec;
|
|
|
|
|
|
|
|
acl_event_enable_listen(__eventp, server_stream,
|
|
|
|
0, listen_callback, server_stream);
|
|
|
|
while (1) {
|
|
|
|
delay_sec = tlsmgr_loop(NULL, NULL);
|
|
|
|
acl_event_set_delay_sec(__eventp, delay_sec);
|
|
|
|
acl_event_loop(__eventp);
|
|
|
|
}
|
|
|
|
|
|
|
|
acl_vstream_close(server_stream);
|
|
|
|
tlsmgr_before_exit(NULL, NULL);
|
|
|
|
return (NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
void tlsmgr_local_start(const char *addr)
|
|
|
|
{
|
|
|
|
const char *myname = "tlsmgr_local_start";
|
|
|
|
static ACL_CONFIG_STR_TABLE str_table[] = {
|
|
|
|
{ VAR_TLS_RAND_SOURCE, DEF_TLS_RAND_SOURCE, &var_tls_rand_source },
|
|
|
|
{ VAR_TLS_RAND_EXCH_NAME, DEF_TLS_RAND_EXCH_NAME, &var_tls_rand_exch_name },
|
|
|
|
{ VAR_SERVER_TLS_SCACHE_DB, DEF_SERVER_TLS_SCACHE_DB, &var_server_tls_scache_db },
|
|
|
|
{ VAR_CLIENT_TLS_SCACHE_DB, DEF_CLIENT_TLS_SCACHE_DB, &var_client_tls_scache_db },
|
|
|
|
{ 0, 0, 0 },
|
|
|
|
};
|
|
|
|
static ACL_CONFIG_INT_TABLE int_table[] = {
|
|
|
|
{ VAR_TLS_RAND_BYTES, DEF_TLS_RAND_BYTES, &var_tls_rand_bytes, 1, 0 },
|
|
|
|
{ VAR_SERVER_TLS_LOGLEVEL, DEF_SERVER_TLS_LOGLEVEL, &var_server_tls_loglevel, 0, 0 },
|
|
|
|
{ VAR_CLIENT_TLS_LOGLEVEL, DEF_CLIENT_TLS_LOGLEVEL, &var_client_tls_loglevel, 0, 0 },
|
|
|
|
|
|
|
|
{ VAR_TLS_RESEED_PERIOD, DEF_TLS_RESEED_PERIOD, &var_tls_reseed_period, 1, 0 },
|
|
|
|
{ VAR_TLS_PRNG_UPD_PERIOD, DEF_TLS_PRNG_UPD_PERIOD, &var_tls_prng_exch_period, 1, 0 },
|
|
|
|
{ VAR_SERVER_TLS_SCACHTIME, DEF_SERVER_TLS_SCACHTIME, &var_server_tls_scache_timeout, 0, 0 },
|
|
|
|
{ VAR_CLIENT_TLS_SCACHTIME, DEF_CLIENT_TLS_SCACHTIME, &var_client_tls_scache_timeout, 0, 0 },
|
|
|
|
{ 0, 0, 0, 0, 0 },
|
|
|
|
};
|
|
|
|
acl_pthread_t tid;
|
|
|
|
acl_pthread_attr_t attr;
|
|
|
|
char def_addr[] = "127.0.0.1:0";
|
|
|
|
ACL_VSTREAM *server_stream;
|
|
|
|
|
|
|
|
acl_get_app_conf_str_table(str_table);
|
|
|
|
acl_get_app_conf_int_table(int_table);
|
|
|
|
|
|
|
|
server_stream = acl_vstream_listen((addr == NULL || *addr == 0) ? def_addr : addr, 128);
|
|
|
|
if (server_stream == NULL) {
|
|
|
|
tlsmgr_before_exit(NULL, NULL);
|
|
|
|
acl_msg_error("%s(%d): listen addr(%s) error(%s)",
|
|
|
|
myname, __LINE__, addr, acl_last_serror());
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
snprintf(var_tlsmgr_service, sizeof(var_tlsmgr_service),
|
|
|
|
"inet:%s", ACL_VSTREAM_LOCAL(server_stream));
|
|
|
|
|
|
|
|
tlsmgr_pre_init(NULL, NULL);
|
|
|
|
tlsmgr_post_init(NULL, NULL);
|
|
|
|
|
|
|
|
acl_pthread_attr_init(&attr);
|
|
|
|
#ifdef ACL_UNIX
|
|
|
|
acl_pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
|
|
|
|
#else
|
|
|
|
acl_pthread_attr_setdetachstate(&attr, ACL_PTHREAD_CREATE_DETACHED);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
acl_pthread_create(&tid, &attr, tlsmgr_thread_main, server_stream);
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif /* USE_TLS */
|
|
|
|
|