X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=bacula%2Fsrc%2Ffiled%2Fauthenticate.c;h=2bff4e07e28d0be67c897b1d3c2248668d917ee5;hb=a0db7e301f083a19f08b3c574f4562cde4a13d1c;hp=6d60323d582ac05d76dfe559dd8ac0944abf40ec;hpb=fab3c713ba8e7384fe1fa404d2e93e50cf161ab1;p=bacula%2Fbacula diff --git a/bacula/src/filed/authenticate.c b/bacula/src/filed/authenticate.c index 6d60323d58..2bff4e07e2 100644 --- a/bacula/src/filed/authenticate.c +++ b/bacula/src/filed/authenticate.c @@ -1,93 +1,198 @@ /* - * Authenticate Director who is attempting to connect. - * - * Kern Sibbald, October 2000 - * - * Version $Id$ - * - */ -/* - Copyright (C) 2000, 2001, 2002 Kern Sibbald and John Walker + Bacula® - The Network Backup Solution + + Copyright (C) 2000-2010 Free Software Foundation Europe e.V. - 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. + 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 + 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) +static bool authenticate(int rcode, BSOCK *bs, JCR* jcr) { - POOLMEM *dirname; - DIRRES *director; + 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) { - 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) { - 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; - 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; } - director = NULL; unbash_spaces(dirname); - LockRes(); - while ((director=(DIRRES *)GetNextRes(rcode, (RES *)director))) { + foreach_res(director, R_DIRECTOR) { if (strcmp(director->hdr.name, dirname) == 0) - break; + break; } - UnlockRes(); if (!director) { - Emsg2(M_FATAL, 0, _("Connection from unknown Director %s at %s rejected.\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; } - if (!cram_md5_auth(bs, director->password) || - !cram_md5_get_auth(bs, director->password)) { - Emsg1(M_FATAL, 0, _("Incorrect password given by Director at %s.\n"), - bs->who); - director = NULL; + + 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 { + 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_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; } free_pool_memory(dirname); - return (director != NULL); + jcr->director = director; + /* 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. * @@ -96,10 +201,9 @@ int authenticate_director(JCR *jcr) { BSOCK *dir = jcr->dir_bsock; - if (!authenticate(R_DIRECTOR, dir)) { + 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); @@ -112,13 +216,91 @@ int authenticate_director(JCR *jcr) int authenticate_storagedaemon(JCR *jcr) { BSOCK *sd = jcr->store_bsock; - int stat; + 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); + + /* 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 { + /* 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()); + } + } + + 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 */ + } + } - stat = cram_md5_get_auth(sd, jcr->sd_auth_key) && - cram_md5_auth(sd, jcr->sd_auth_key); +auth_fatal: + /* Destroy session key */ memset(jcr->sd_auth_key, 0, strlen(jcr->sd_auth_key)); - if (!stat) { - Jmsg(jcr, M_FATAL, 0, _("Authorization key rejected by Storage daemon.\n")); + stop_bsock_timer(tid); + /* Single thread all failures to avoid DOS */ + if (!auth_success) { + P(mutex); + bmicrosleep(6, 0); + V(mutex); } - return stat; + return auth_success; }