* <http://www.OpenLDAP.org/license.html>.
*/
/* ACKNOWLEDGEMENTS:
- * This work was initially developed by the Howard Chu for inclusion
+ * This work was initially developed by Howard Chu for inclusion
* in OpenLDAP Software and subsequently enhanced by Pierangelo
* Masarati.
*/
static LDAP_REBIND_PROC ldap_back_rebind;
-#ifdef LDAP_BACK_PROXY_AUTHZ
static int
ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs );
-#endif /* LDAP_BACK_PROXY_AUTHZ */
+
+static int
+ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
int
ldap_back_bind( Operation *op, SlapReply *rs )
int rc = 0;
ber_int_t msgid;
- lc = ldap_back_getconn( op, rs );
+ lc = ldap_back_getconn( op, rs, LDAP_BACK_SENDERR );
if ( !lc ) {
- return( -1 );
+ return rs->sr_err;
}
if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val,
LDAP_SASL_SIMPLE,
&op->orb_cred, op->o_ctrls, NULL, &msgid );
- rc = ldap_back_op_result( lc, op, rs, msgid, 1 );
+ rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
if ( rc == LDAP_SUCCESS ) {
-#if defined(LDAP_BACK_PROXY_AUTHZ)
+ /* If defined, proxyAuthz will be used also when
+ * back-ldap is the authorizing backend; for this
+ * purpose, a successful bind is followed by a
+ * bind with the configured identity assertion */
+ /* NOTE: use with care */
if ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
ldap_back_proxy_authz_bind( lc, op, rs );
if ( lc->lc_bound == 0 ) {
goto done;
}
}
-#endif /* LDAP_BACK_PROXY_AUTHZ */
lc->lc_bound = 1;
ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
- if ( li->savecred ) {
+ if ( LDAP_BACK_SAVECRED( li ) ) {
if ( !BER_BVISNULL( &lc->lc_cred ) ) {
memset( lc->lc_cred.bv_val, 0,
lc->lc_cred.bv_len );
return 0;
}
+static int
+ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
+{
+ struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
+ int vers = op->o_protocol;
+ LDAP *ld = NULL;
+
+ assert( lcp != NULL );
+
+ rs->sr_err = ldap_initialize( &ld, li->url );
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ goto error_return;
+ }
+
+ /* Set LDAP version. This will always succeed: If the client
+ * bound with a particular version, then so can we.
+ */
+ ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&vers );
+
+ /* automatically chase referrals ("[dont-]chase-referrals" statement) */
+ if ( LDAP_BACK_CHASE_REFERRALS( li ) ) {
+ ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
+ }
+
+#ifdef HAVE_TLS
+ /* start TLS ("tls-[try-]{start,propagate}" statements) */
+ if ( ( LDAP_BACK_USE_TLS( li ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( li ) ) )
+ && !ldap_is_ldaps_url( li->url ) )
+ {
+#ifdef SLAP_STARTTLS_ASYNCHRONOUS
+ /*
+ * use asynchronous StartTLS
+ * in case, chase referral (not implemented yet)
+ */
+ int msgid;
+
+ rs->sr_err = ldap_start_tls( ld, NULL, NULL, &msgid );
+ if ( rs->sr_err == LDAP_SUCCESS ) {
+ LDAPMessage *res = NULL;
+ int rc, retries = 1;
+ struct timeval tv = { 0, 0 };
+
+retry:;
+ rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
+ if ( rc < 0 ) {
+ rs->sr_err = LDAP_OTHER;
+
+ } else if ( rc == 0 ) {
+ if ( retries ) {
+ retries--;
+ tv.tv_sec = 0;
+ tv.tv_usec = 100000;
+ goto retry;
+ }
+ rs->sr_err = LDAP_OTHER;
+
+ } else if ( rc == LDAP_RES_EXTENDED ) {
+ struct berval *data = NULL;
+
+ rs->sr_err = ldap_parse_extended_result( ld, res,
+ NULL, &data, 0 );
+ if ( rs->sr_err == LDAP_SUCCESS ) {
+ rs->sr_err = ldap_result2error( ld, res, 1 );
+ res = NULL;
+
+ /* FIXME: in case a referral
+ * is returned, should we try
+ * using it instead of the
+ * configured URI? */
+ if ( rs->sr_err == LDAP_SUCCESS ) {
+ ldap_install_tls( ld );
+
+ } else if ( rs->sr_err == LDAP_REFERRAL ) {
+ rs->sr_err = LDAP_OTHER;
+ rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
+ }
+
+ if ( data ) {
+ if ( data->bv_val ) {
+ ber_memfree( data->bv_val );
+ }
+ ber_memfree( data );
+ }
+ }
+
+ } else {
+ rs->sr_err = LDAP_OTHER;
+ }
+
+ if ( res != NULL ) {
+ ldap_msgfree( res );
+ }
+ }
+#else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
+ /*
+ * use synchronous StartTLS
+ */
+ rs->sr_err = ldap_start_tls_s( ld, NULL, NULL );
+#endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
+
+ /* if StartTLS is requested, only attempt it if the URL
+ * is not "ldaps://"; this may occur not only in case
+ * of misconfiguration, but also when used in the chain
+ * overlay, where the "uri" can be parsed out of a referral */
+ if ( rs->sr_err == LDAP_SERVER_DOWN
+ || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( li ) ) )
+ {
+ ldap_unbind_ext_s( ld, NULL, NULL );
+ goto error_return;
+ }
+ }
+#endif /* HAVE_TLS */
+
+ if ( *lcp == NULL ) {
+ *lcp = (struct ldapconn *)ch_malloc( sizeof( struct ldapconn ) );
+ memset( *lcp, 0, sizeof( struct ldapconn ) );
+ }
+ (*lcp)->lc_ld = ld;
+
+error_return:;
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ rs->sr_err = slap_map_api2result( rs );
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ if ( rs->sr_text == NULL ) {
+ rs->sr_text = "ldap_initialize() failed";
+ }
+ send_ldap_result( op, rs );
+ rs->sr_text = NULL;
+ }
+ }
+
+ return rs->sr_err;
+}
+
struct ldapconn *
-ldap_back_getconn( Operation *op, SlapReply *rs )
+ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
{
struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
- struct ldapconn *lc, lc_curr;
- LDAP *ld;
- int is_priv = 0;
+ struct ldapconn *lc, lc_curr = { 0 };
/* Searches for a ldapconn in the avl tree */
if ( op->o_do_not_cache || be_isroot( op ) ) {
lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
lc_curr.lc_conn = NULL;
- is_priv = 1;
+ lc_curr.lc_ispriv = 1;
} else {
lc_curr.lc_local_ndn = op->o_ndn;
/* Looks like we didn't get a bind. Open a new session... */
if ( !lc ) {
- int vers = op->o_protocol;
- rs->sr_err = ldap_initialize( &ld, li->url );
-
- if ( rs->sr_err != LDAP_SUCCESS ) {
- rs->sr_err = slap_map_api2result( rs );
- if ( rs->sr_text == NULL ) {
- rs->sr_text = "ldap_initialize() failed";
- }
- if ( op->o_conn ) {
- send_ldap_result( op, rs );
- }
- rs->sr_text = NULL;
- return( NULL );
+ /* lc here must be NULL */
+ if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
+ return NULL;
}
- /* Set LDAP version. This will always succeed: If the client
- * bound with a particular version, then so can we.
- */
- ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION,
- (const void *)&vers );
- /* FIXME: configurable? */
- ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
- lc = (struct ldapconn *)ch_malloc( sizeof( struct ldapconn ) );
lc->lc_conn = lc_curr.lc_conn;
- lc->lc_ld = ld;
ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
ldap_pvt_thread_mutex_init( &lc->lc_mutex );
- if ( is_priv ) {
+ if ( lc_curr.lc_ispriv ) {
ber_dupbv( &lc->lc_cred, &li->acl_passwd );
ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
+ lc->lc_ispriv = lc_curr.lc_ispriv;
} else {
BER_BVZERO( &lc->lc_cred );
/* Err could be -1 in case a duplicate ldapconn is inserted */
if ( rs->sr_err != 0 ) {
ldap_back_conn_free( lc );
- if ( op->o_conn ) {
+ if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
send_ldap_error( op, rs, LDAP_OTHER,
"internal server error" );
}
- return( NULL );
+ return NULL;
}
} else {
Debug( LDAP_DEBUG_TRACE,
"=>ldap_back_getconn: conn %p fetched\n", (void *) lc, 0, 0 );
}
- return( lc );
+ return lc;
}
/*
* it from all the callers, and I made the function return the flag, so
* it can be used to simplify the check.
*/
-int
-ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs )
+static int
+ldap_back_dobind_int(
+ struct ldapconn *lc,
+ Operation *op,
+ SlapReply *rs,
+ ldap_back_send_t sendok,
+ int retries )
{
int rc;
ber_int_t msgid;
- ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
+ assert( retries >= 0 );
+
if ( !lc->lc_bound ) {
-#ifdef LDAP_BACK_PROXY_AUTHZ
+ struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
+
/*
* FIXME: we need to let clients use proxyAuthz
* otherwise we cannot do symmetric pools of servers;
*/
/*
* if no bind took place yet, but the connection is bound
- * and the "proxyauthzdn" is set, then bind as
- * "proxyauthzdn" and explicitly add the proxyAuthz
- * control to every operation with the dn bound
- * to the connection as control value.
+ * and the "idassert-authcDN" (or other ID) is set,
+ * then bind as the asserting identity and explicitly
+ * add the proxyAuthz control to every operation with the
+ * dn bound to the connection as control value.
+ * This is done also if this is the authrizing backend,
+ * but the "override" flag is given to idassert.
+ * It allows to use SASL bind and yet proxyAuthz users
*/
- if ( op->o_conn != NULL && BER_BVISNULL( &lc->lc_bound_ndn ) ) {
+ if ( op->o_conn != NULL &&
+ !op->o_do_not_cache &&
+ !be_isroot( op ) &&
+ ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
+ ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
+ {
(void)ldap_back_proxy_authz_bind( lc, op, rs );
goto done;
}
-#endif /* LDAP_BACK_PROXY_AUTHZ */
+#ifdef HAVE_CYRUS_SASL
+ if ( lc->lc_ispriv && li->acl_authmethod == LDAP_AUTH_SASL ) {
+ void *defaults = NULL;
+
+#if 1 /* will deal with this later... */
+ if ( li->acl_secprops != NULL ) {
+ rc = ldap_set_option( lc->lc_ld,
+ LDAP_OPT_X_SASL_SECPROPS, li->acl_secprops);
+
+ if( rc != LDAP_OPT_SUCCESS ) {
+ Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
+ "(%s,SECPROPS,\"%s\") failed!\n",
+ li->url, li->acl_secprops, 0 );
+ goto done;
+ }
+ }
+#endif
+
+ defaults = lutil_sasl_defaults( lc->lc_ld,
+ li->acl_sasl_mech.bv_val,
+ li->acl_sasl_realm.bv_val,
+ li->acl_authcID.bv_val,
+ li->acl_passwd.bv_val,
+ NULL );
+
+ rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
+ li->acl_authcDN.bv_val,
+ li->acl_sasl_mech.bv_val, NULL, NULL,
+ LDAP_SASL_QUIET, lutil_sasl_interact,
+ defaults );
+
+ lutil_sasl_freedefs( defaults );
+
+ rs->sr_err = slap_map_api2result( rs );
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ lc->lc_bound = 0;
+ send_ldap_result( op, rs );
+
+ } else {
+ lc->lc_bound = 1;
+ }
+ goto done;
+ }
+#endif /* HAVE_CYRUS_SASL */
+
+retry:;
rs->sr_err = ldap_sasl_bind( lc->lc_ld,
lc->lc_bound_ndn.bv_val,
LDAP_SASL_SIMPLE, &lc->lc_cred,
NULL, NULL, &msgid );
-
- rc = ldap_back_op_result( lc, op, rs, msgid, 0 );
+
+ if ( rs->sr_err == LDAP_SERVER_DOWN ) {
+ if ( retries > 0 ) {
+ ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
+ lc->lc_ld = NULL;
+
+ /* lc here must be the regular lc, reset and ready for init */
+ if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
+ return 0;
+ }
+
+ retries--;
+ goto retry;
+ }
+
+ ldap_back_freeconn( op, lc );
+ rs->sr_err = slap_map_api2result( rs );
+
+ return 0;
+ }
+
+ rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
if ( rc == LDAP_SUCCESS ) {
lc->lc_bound = 1;
}
done:;
rc = lc->lc_bound;
+ return rc;
+}
+
+int
+ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
+{
+ int rc;
+
+ ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
+ rc = ldap_back_dobind_int( lc, op, rs, sendok, 1 );
ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
+
return rc;
}
ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
ber_int_t msgid, void *params )
{
- struct ldapconn *lc = params;
+ struct ldapconn *lc = (struct ldapconn *)params;
+
+ /* FIXME: add checks on the URL/identity? */
return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
int
ldap_back_op_result(
- struct ldapconn *lc,
- Operation *op,
- SlapReply *rs,
- ber_int_t msgid,
- int sendok )
+ struct ldapconn *lc,
+ Operation *op,
+ SlapReply *rs,
+ ber_int_t msgid,
+ ldap_back_send_t sendok )
{
char *match = NULL;
LDAPMessage *res = NULL;
rs->sr_matched = match;
}
}
- if ( op->o_conn && ( sendok || rs->sr_err != LDAP_SUCCESS ) ) {
+ if ( op->o_conn &&
+ ( ( sendok & LDAP_BACK_SENDOK )
+ || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
+ {
send_ldap_result( op, rs );
}
if ( match ) {
/* return true if bound, false if failed */
int
-ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs )
+ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
{
- struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
- int vers = op->o_protocol;
- LDAP *ld;
+ int rc;
ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
+ lc->lc_ld = NULL;
lc->lc_bound = 0;
- rs->sr_err = ldap_initialize( &ld, li->url );
-
- if ( rs->sr_err != LDAP_SUCCESS ) {
- rs->sr_err = slap_map_api2result( rs );
- if ( rs->sr_text == NULL ) {
- rs->sr_text = "ldap_initialize() failed";
- }
- if ( op->o_conn ) {
- send_ldap_result( op, rs );
- }
- rs->sr_text = NULL;
- return 0;
+
+ /* lc here must be the regular lc, reset and ready for init */
+ rc = ldap_back_prepare_conn( &lc, op, rs, sendok );
+ if ( rc == LDAP_SUCCESS ) {
+ rc = ldap_back_dobind_int( lc, op, rs, sendok, 0 );
}
- /* Set LDAP version. This will always succeed: If the client
- * bound with a particular version, then so can we.
- */
- ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&vers );
- /* FIXME: configurable? */
- ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
- lc->lc_ld = ld;
ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
- return ldap_back_dobind( lc, op, rs );
+
+ return rc;
}
-#ifdef LDAP_BACK_PROXY_AUTHZ
static int
ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
{
rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
li->idassert_sasl_mech.bv_val, NULL, NULL,
- li->idassert_sasl_flags, lutil_sasl_interact,
+ LDAP_SASL_QUIET, lutil_sasl_interact,
defaults );
lutil_sasl_freedefs( defaults );
goto done;
}
- rc = ldap_back_op_result( lc, op, rs, msgid, 0 );
+ rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
if ( rc == LDAP_SUCCESS ) {
lc->lc_bound = 1;
}
* If no server-side controls are defined for the operation,
* simply add the proxyAuthz control; otherwise, if the
* proxyAuthz control is not already set, add it as
- * the first one (FIXME: is controls order significant
- * for security?).
+ * the first one
+ *
+ * FIXME: is controls order significant for security?
+ * ANSWER: controls ordering and interoperability
+ * must be indicated by the specs of each control; if none
+ * is specified, the order is irrelevant.
*/
int
ldap_back_proxy_authz_ctrl(
goto done;
}
- if ( !op->o_conn ) {
+ if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
goto done;
}
{
LDAPControl **ctrls = *pctrls;
+ /* we assume that the first control is the proxyAuthz
+ * added by back-ldap, so it's the only one we explicitly
+ * free */
if ( ctrls && ctrls != op->o_ctrls ) {
assert( ctrls[ 0 ] );
return 0;
}
-#endif /* LDAP_BACK_PROXY_AUTHZ */
projects / openldap / blobdiff