/*
- * Authenticate Director who is attempting to connect.
- *
- * Kern Sibbald, October 2000
- *
- * Version $Id$
- *
- */
-/*
- Copyright (C) 2000-2004 Kern Sibbald and John Walker
+ Bacula® - The Network Backup Solution
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2 of
- the License, or (at your option) any later version.
+ Copyright (C) 2000-2010 Free Software Foundation Europe e.V.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
+ The main author of Bacula is Kern Sibbald, with contributions from
+ many others, a complete list can be found in the file AUTHORS.
+ This program is Free Software; you can redistribute it and/or
+ modify it under the terms of version three of the GNU Affero General Public
+ License as published by the Free Software Foundation and included
+ in the file LICENSE.
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
- You should have received a copy of the GNU General Public
- License along with this program; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- MA 02111-1307, USA.
+ You should have received a copy of the GNU Affero General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
+ Bacula® is a registered trademark of Kern Sibbald.
+ The licensor of Bacula is the Free Software Foundation Europe
+ (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
+ Switzerland, email:ftf@fsfeurope.org.
+*/
+/*
+ * Authenticate Director who is attempting to connect.
+ *
+ * Kern Sibbald, October 2000
+ *
*/
-
+
#include "bacula.h"
#include "filed.h"
-static char OK_hello[] = "2000 OK Hello\n";
-static char Dir_sorry[] = "2999 No go\n";
+const int dbglvl = 50;
+/* Version at end of Hello
+ * prior to 10Mar08 no version
+ * 1 10Mar08
+ * 2 13Mar09 - added the ability to restore from multiple storages
+ * 3 03Sep10 - added the restore object command for vss plugin
+ */
+static char OK_hello[] = "2000 OK Hello 3\n";
+static char Dir_sorry[] = "2999 Authentication failed.\n";
+static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
-/*********************************************************************
+/*********************************************************************
*
*/
-static int authenticate(int rcode, BSOCK *bs, JCR* jcr)
+static bool authenticate(int rcode, BSOCK *bs, JCR* jcr)
{
- POOLMEM *dirname;
- DIRRES *director;
- int ssl_need = BNET_SSL_NONE;
- bool auth, get_auth = false;
+ POOLMEM *dirname = get_pool_memory(PM_MESSAGE);
+ DIRRES *director = NULL;
+ int tls_local_need = BNET_TLS_NONE;
+ int tls_remote_need = BNET_TLS_NONE;
+ int compatible = true; /* Want md5 compatible DIR */
+ bool auth_success = false;
+ alist *verify_list = NULL;
+ btimer_t *tid = NULL;
if (rcode != R_DIRECTOR) {
- Dmsg1(50, _("I only authenticate directors, not %d\n"), rcode);
- Emsg1(M_FATAL, 0, _("I only authenticate directors, not %d\n"), rcode);
- return 0;
+ Dmsg1(dbglvl, "I only authenticate directors, not %d\n", rcode);
+ Jmsg1(jcr, M_FATAL, 0, _("I only authenticate directors, not %d\n"), rcode);
+ goto auth_fatal;
}
- if (bs->msglen < 25 || bs->msglen > 200) {
- Dmsg2(50, _("Bad Hello command from Director at %s. Len=%d.\n"),
- bs->who, bs->msglen);
- Emsg2(M_FATAL, 0, _("Bad Hello command from Director at %s. Len=%d.\n"),
- bs->who, bs->msglen);
- return 0;
+ if (bs->msglen < 25 || bs->msglen > 500) {
+ Dmsg2(dbglvl, "Bad Hello command from Director at %s. Len=%d.\n",
+ bs->who(), bs->msglen);
+ char addr[64];
+ char *who = bnet_get_peer(bs, addr, sizeof(addr)) ? bs->who() : addr;
+ Jmsg2(jcr, M_FATAL, 0, _("Bad Hello command from Director at %s. Len=%d.\n"),
+ who, bs->msglen);
+ goto auth_fatal;
}
- dirname = get_pool_memory(PM_MESSAGE);
dirname = check_pool_memory_size(dirname, bs->msglen);
- if (sscanf(bs->msg, "Hello Director %s calling\n", dirname) != 1) {
- free_pool_memory(dirname);
+ if (sscanf(bs->msg, "Hello Director %s calling", dirname) != 1) {
+ char addr[64];
+ char *who = bnet_get_peer(bs, addr, sizeof(addr)) ? bs->who() : addr;
bs->msg[100] = 0;
- Dmsg2(50, _("Bad Hello command from Director at %s: %s\n"),
- bs->who, bs->msg);
- Emsg2(M_FATAL, 0, _("Bad Hello command from Director at %s: %s\n"),
- bs->who, bs->msg);
- return 0;
+ Dmsg2(dbglvl, "Bad Hello command from Director at %s: %s\n",
+ bs->who(), bs->msg);
+ Jmsg2(jcr, M_FATAL, 0, _("Bad Hello command from Director at %s: %s\n"),
+ who, bs->msg);
+ goto auth_fatal;
}
unbash_spaces(dirname);
- LockRes();
foreach_res(director, R_DIRECTOR) {
if (strcmp(director->hdr.name, dirname) == 0)
- break;
+ break;
}
- UnlockRes();
if (!director) {
- Dmsg2(50, _("Connection from unknown Director %s at %s rejected.\n"),
- dirname, bs->who);
- Emsg2(M_FATAL, 0, _("Connection from unknown Director %s at %s rejected.\n"
- "Please see http://www.bacula.org/html-manual/faq.html#AuthorizationErrors for help.\n"),
- dirname, bs->who);
- free_pool_memory(dirname);
- return 0;
+ char addr[64];
+ char *who = bnet_get_peer(bs, addr, sizeof(addr)) ? bs->who() : addr;
+ Jmsg2(jcr, M_FATAL, 0, _("Connection from unknown Director %s at %s rejected.\n"),
+ dirname, who);
+ goto auth_fatal;
}
- btimer_t *tid = start_bsock_timer(bs, AUTH_TIMEOUT);
- auth = cram_md5_auth(bs, director->password, ssl_need);
- if (auth) {
- get_auth = cram_md5_get_auth(bs, director->password, ssl_need);
- if (!get_auth) {
- Dmsg1(50, "cram_get_auth failed for %s\n", bs->who);
+
+ if (have_tls) {
+ /* TLS Requirement */
+ if (director->tls_enable) {
+ if (director->tls_require) {
+ tls_local_need = BNET_TLS_REQUIRED;
+ } else {
+ tls_local_need = BNET_TLS_OK;
+ }
+ }
+
+ if (director->tls_authenticate) {
+ tls_local_need = BNET_TLS_REQUIRED;
+ }
+
+ if (director->tls_verify_peer) {
+ verify_list = director->tls_allowed_cns;
+ }
+ }
+
+ tid = start_bsock_timer(bs, AUTH_TIMEOUT);
+ /* Challenge the director */
+ auth_success = cram_md5_challenge(bs, director->password, tls_local_need, compatible);
+ if (job_canceled(jcr)) {
+ auth_success = false;
+ goto auth_fatal; /* quick exit */
+ }
+ if (auth_success) {
+ auth_success = cram_md5_respond(bs, director->password, &tls_remote_need, &compatible);
+ if (!auth_success) {
+ char addr[64];
+ char *who = bnet_get_peer(bs, addr, sizeof(addr)) ? bs->who() : addr;
+ Dmsg1(dbglvl, "cram_get_auth failed for %s\n", who);
}
} else {
- Dmsg1(50, "cram_auth failed for %s\n", bs->who);
+ char addr[64];
+ char *who = bnet_get_peer(bs, addr, sizeof(addr)) ? bs->who() : addr;
+ Dmsg1(dbglvl, "cram_auth failed for %s\n", who);
}
- if (!auth || !get_auth) {
- Emsg1(M_FATAL, 0, _("Incorrect password given by Director at %s.\n"
- "Please see http://www.bacula.org/html-manual/faq.html#AuthorizationErrors for help.\n"),
- bs->who);
- director = NULL;
+ if (!auth_success) {
+ Emsg1(M_FATAL, 0, _("Incorrect password given by Director at %s.\n"),
+ bs->who());
+ goto auth_fatal;
+ }
+
+ /* Verify that the remote host is willing to meet our TLS requirements */
+ if (tls_remote_need < tls_local_need && tls_local_need != BNET_TLS_OK && tls_remote_need != BNET_TLS_OK) {
+ Jmsg0(jcr, M_FATAL, 0, _("Authorization problem: Remote server did not"
+ " advertize required TLS support.\n"));
+ Dmsg2(dbglvl, "remote_need=%d local_need=%d\n", tls_remote_need, tls_local_need);
+ auth_success = false;
+ goto auth_fatal;
+ }
+
+ /* Verify that we are willing to meet the remote host's requirements */
+ if (tls_remote_need > tls_local_need && tls_local_need != BNET_TLS_OK && tls_remote_need != BNET_TLS_OK) {
+ Jmsg0(jcr, M_FATAL, 0, _("Authorization problem: Remote server requires TLS.\n"));
+ Dmsg2(dbglvl, "remote_need=%d local_need=%d\n", tls_remote_need, tls_local_need);
+ auth_success = false;
+ goto auth_fatal;
+ }
+
+ if (tls_local_need >= BNET_TLS_OK && tls_remote_need >= BNET_TLS_OK) {
+ /* Engage TLS! Full Speed Ahead! */
+ if (!bnet_tls_server(director->tls_ctx, bs, verify_list)) {
+ Jmsg0(jcr, M_FATAL, 0, _("TLS negotiation failed.\n"));
+ auth_success = false;
+ goto auth_fatal;
+ }
+ if (director->tls_authenticate) { /* authentication only? */
+ bs->free_tls(); /* shutodown tls */
+ }
+ }
+
+auth_fatal:
+ if (tid) {
+ stop_bsock_timer(tid);
+ tid = NULL;
}
- stop_bsock_timer(tid);
free_pool_memory(dirname);
jcr->director = director;
- return (director != NULL);
+ /* Single thread all failures to avoid DOS */
+ if (!auth_success) {
+ P(mutex);
+ bmicrosleep(6, 0);
+ V(mutex);
+ }
+ return auth_success;
}
/*
* Inititiate the communications with the Director.
* He has made a connection to our server.
- *
+ *
* Basic tasks done here:
* We read Director's initial message and authorize him.
*
if (!authenticate(R_DIRECTOR, dir, jcr)) {
bnet_fsend(dir, "%s", Dir_sorry);
Emsg0(M_FATAL, 0, _("Unable to authenticate Director\n"));
- bmicrosleep(5, 0);
return 0;
}
return bnet_fsend(dir, "%s", OK_hello);
int authenticate_storagedaemon(JCR *jcr)
{
BSOCK *sd = jcr->store_bsock;
- int ssl_need = BNET_SSL_NONE;
- bool get_auth, auth = false;
+ int tls_local_need = BNET_TLS_NONE;
+ int tls_remote_need = BNET_TLS_NONE;
+ int compatible = true;
+ bool auth_success = false;
btimer_t *tid = start_bsock_timer(sd, AUTH_TIMEOUT);
- get_auth = cram_md5_get_auth(sd, jcr->sd_auth_key, ssl_need);
- if (!get_auth) {
- Dmsg1(50, "cram_get_auth failed for %s\n", sd->who);
+
+ /* TLS Requirement */
+ if (have_tls && me->tls_enable) {
+ if (me->tls_require) {
+ tls_local_need = BNET_TLS_REQUIRED;
+ } else {
+ tls_local_need = BNET_TLS_OK;
+ }
+ }
+
+ if (me->tls_authenticate) {
+ tls_local_need = BNET_TLS_REQUIRED;
+ }
+
+ if (job_canceled(jcr)) {
+ auth_success = false; /* force quick exit */
+ goto auth_fatal;
+ }
+
+ /* Respond to SD challenge */
+ auth_success = cram_md5_respond(sd, jcr->sd_auth_key, &tls_remote_need, &compatible);
+ if (job_canceled(jcr)) {
+ auth_success = false; /* force quick exit */
+ goto auth_fatal;
+ }
+ if (!auth_success) {
+ Dmsg1(dbglvl, "cram_respond failed for %s\n", sd->who());
} else {
- auth = cram_md5_auth(sd, jcr->sd_auth_key, ssl_need);
- if (!auth) {
- Dmsg1(50, "cram_auth failed for %s\n", sd->who);
+ /* Now challenge him */
+ auth_success = cram_md5_challenge(sd, jcr->sd_auth_key, tls_local_need, compatible);
+ if (!auth_success) {
+ Dmsg1(dbglvl, "cram_challenge failed for %s\n", sd->who());
}
}
- stop_bsock_timer(tid);
+
+ if (!auth_success) {
+ Jmsg(jcr, M_FATAL, 0, _("Authorization key rejected by Storage daemon.\n"
+ "Please see http://www.bacula.org/en/rel-manual/Bacula_Freque_Asked_Questi.html#SECTION003760000000000000000 for help.\n"));
+ goto auth_fatal;
+ }
+
+ /* Verify that the remote host is willing to meet our TLS requirements */
+ if (tls_remote_need < tls_local_need && tls_local_need != BNET_TLS_OK && tls_remote_need != BNET_TLS_OK) {
+ Jmsg(jcr, M_FATAL, 0, _("Authorization problem: Remote server did not"
+ " advertize required TLS support.\n"));
+ Dmsg2(dbglvl, "remote_need=%d local_need=%d\n", tls_remote_need, tls_local_need);
+ auth_success = false;
+ goto auth_fatal;
+ }
+
+ /* Verify that we are willing to meet the remote host's requirements */
+ if (tls_remote_need > tls_local_need && tls_local_need != BNET_TLS_OK && tls_remote_need != BNET_TLS_OK) {
+ Jmsg(jcr, M_FATAL, 0, _("Authorization problem: Remote server requires TLS.\n"));
+ Dmsg2(dbglvl, "remote_need=%d local_need=%d\n", tls_remote_need, tls_local_need);
+ auth_success = false;
+ goto auth_fatal;
+ }
+
+ if (tls_local_need >= BNET_TLS_OK && tls_remote_need >= BNET_TLS_OK) {
+ /* Engage TLS! Full Speed Ahead! */
+ if (!bnet_tls_client(me->tls_ctx, sd, NULL)) {
+ Jmsg(jcr, M_FATAL, 0, _("TLS negotiation failed.\n"));
+ auth_success = false;
+ goto auth_fatal;
+ }
+ if (me->tls_authenticate) { /* tls authentication only? */
+ sd->free_tls(); /* yes, shutdown tls */
+ }
+ }
+
+auth_fatal:
+ /* Destroy session key */
memset(jcr->sd_auth_key, 0, strlen(jcr->sd_auth_key));
- if (!get_auth || !auth) {
- Jmsg(jcr, M_FATAL, 0, _("Authorization key rejected by Storage daemon.\n"
- "Please see http://www.bacula.org/html-manual/faq.html#AuthorizationErrors for help.\n"));
+ stop_bsock_timer(tid);
+ /* Single thread all failures to avoid DOS */
+ if (!auth_success) {
+ P(mutex);
+ bmicrosleep(6, 0);
+ V(mutex);
}
- return get_auth && auth;
+ return auth_success;
}
projects / bacula / bacula / blobdiff