/* bind.c - decode an ldap bind operation and pass it to a backend db */
-
-/*
- * Copyright (c) 1995 Regents of the University of Michigan.
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2006 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* Portions Copyright (c) 1995 Regents of the University of Michigan.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
#include "slap.h"
-void
+int
do_bind(
- Connection *conn,
- Operation *op
-)
+ Operation *op,
+ SlapReply *rs )
{
- BerElement *ber = op->o_ber;
- ber_int_t version;
+ BerElement *ber = op->o_ber;
+ ber_int_t version;
ber_tag_t method;
- char *cdn, *ndn;
- ber_tag_t rc;
- struct berval cred;
- Backend *be;
+ struct berval mech = BER_BVNULL;
+ struct berval dn = BER_BVNULL;
+ ber_tag_t tag;
+ Backend *be = NULL;
Debug( LDAP_DEBUG_TRACE, "do_bind\n", 0, 0, 0 );
+ /*
+ * Force to connection to "anonymous" until bind succeeds.
+ */
+ ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
+ if ( op->o_conn->c_sasl_bind_in_progress ) {
+ be = op->o_conn->c_authz_backend;
+ }
+ if ( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
+ /* log authorization identity demotion */
+ Statslog( LDAP_DEBUG_STATS,
+ "%s BIND anonymous mech=implicit ssf=0\n",
+ op->o_log_prefix, 0, 0, 0, 0 );
+ }
+ connection2anonymous( op->o_conn );
+ if ( op->o_conn->c_sasl_bind_in_progress ) {
+ op->o_conn->c_authz_backend = be;
+ }
+ ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
+ if ( !BER_BVISNULL( &op->o_dn ) ) {
+ /* NOTE: temporarily wasting few bytes
+ * (until bind is completed), but saving
+ * a couple of ch_free() and ch_strdup("") */
+ op->o_dn.bv_val[0] = '\0';
+ op->o_dn.bv_len = 0;
+ }
+ if ( !BER_BVISNULL( &op->o_ndn ) ) {
+ op->o_ndn.bv_val[0] = '\0';
+ op->o_ndn.bv_len = 0;
+ }
+
/*
* Parse the bind request. It looks like this:
*
* authentication CHOICE {
* simple [0] OCTET STRING -- passwd
* krbv42ldap [1] OCTET STRING
- * krbv42dsa [1] OCTET STRING
+ * krbv42dsa [2] OCTET STRING
+ * SASL [3] SaslCredentials
* }
* }
+ *
+ * SaslCredentials ::= SEQUENCE {
+ * mechanism LDAPString,
+ * credentials OCTET STRING OPTIONAL
+ * }
*/
- rc = ber_scanf( ber, "{iato}", &version, &cdn, &method, &cred );
+ tag = ber_scanf( ber, "{imt" /*}*/, &version, &dn, &method );
- if ( rc == LBER_ERROR ) {
+ if ( tag == LBER_ERROR ) {
Debug( LDAP_DEBUG_ANY, "bind: ber_scanf failed\n", 0, 0, 0 );
- send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL,
- "decoding error" );
- return;
+ send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
+ rs->sr_err = SLAPD_DISCONNECT;
+ goto cleanup;
}
- Debug( LDAP_DEBUG_TRACE, "do_bind: version %d dn (%s) method %d\n",
- version, cdn, method );
+ op->o_protocol = version;
+ op->orb_method = method;
- ndn = dn_normalize_case( ch_strdup( cdn ) );
+ if( op->orb_method != LDAP_AUTH_SASL ) {
+ tag = ber_scanf( ber, /*{*/ "m}", &op->orb_cred );
- Statslog( LDAP_DEBUG_STATS, "conn=%d op=%d BIND dn=\"%s\" method=%d\n",
- conn->c_connid, op->o_opid, ndn, method, 0 );
+ } else {
+ tag = ber_scanf( ber, "{m" /*}*/, &mech );
- if ( version < LDAP_VERSION_MIN || version > LDAP_VERSION_MAX ) {
- if ( cdn != NULL ) {
- free( cdn );
- }
- if ( ndn != NULL ) {
- free( ndn );
- }
- if ( cred.bv_val != NULL ) {
- free( cred.bv_val );
- }
+ if ( tag != LBER_ERROR ) {
+ ber_len_t len;
+ tag = ber_peek_tag( ber, &len );
- Debug( LDAP_DEBUG_ANY, "unknown version %d\n", version, 0, 0 );
- send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL,
- "version not supported" );
- return;
- }
+ if ( tag == LDAP_TAG_LDAPCRED ) {
+ tag = ber_scanf( ber, "m", &op->orb_cred );
+ } else {
+ tag = LDAP_TAG_LDAPCRED;
+ BER_BVZERO( &op->orb_cred );
+ }
- /* accept null binds */
- if ( ndn == NULL || *ndn == '\0' ) {
- if ( cdn != NULL ) {
- free( cdn );
- }
- if ( ndn != NULL ) {
- free( ndn );
- }
- if ( cred.bv_val != NULL ) {
- free( cred.bv_val );
+ if ( tag != LBER_ERROR ) {
+ tag = ber_scanf( ber, /*{{*/ "}}" );
+ }
}
+ }
- ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+ if ( tag == LBER_ERROR ) {
+ send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
+ rs->sr_err = SLAPD_DISCONNECT;
+ goto cleanup;
+ }
- conn->c_protocol = version;
+ if( get_ctrls( op, rs, 1 ) != LDAP_SUCCESS ) {
+ Debug( LDAP_DEBUG_ANY, "do_bind: get_ctrls failed\n", 0, 0, 0 );
+ goto cleanup;
+ }
- if ( conn->c_cdn != NULL ) {
- free( conn->c_cdn );
- conn->c_cdn = NULL;
- }
+ /* We use the tmpmemctx here because it speeds up normalization.
+ * However, we must dup with regular malloc when storing any
+ * resulting DNs in the op or conn structures.
+ */
+ rs->sr_err = dnPrettyNormal( NULL, &dn, &op->o_req_dn, &op->o_req_ndn,
+ op->o_tmpmemctx );
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ Debug( LDAP_DEBUG_ANY, "bind: invalid dn (%s)\n",
+ dn.bv_val, 0, 0 );
+ send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid DN" );
+ goto cleanup;
+ }
- if ( conn->c_dn != NULL ) {
- free( conn->c_dn );
- conn->c_dn = NULL;
- }
+ if( op->orb_method == LDAP_AUTH_SASL ) {
+ Debug( LDAP_DEBUG_TRACE, "do_sasl_bind: dn (%s) mech %s\n",
+ op->o_req_dn.bv_val, mech.bv_val, NULL );
+
+ } else {
+ Debug( LDAP_DEBUG_TRACE,
+ "do_bind: version=%ld dn=\"%s\" method=%ld\n",
+ (unsigned long) version, op->o_req_dn.bv_val,
+ (unsigned long) op->orb_method );
+ }
- ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+ Statslog( LDAP_DEBUG_STATS, "%s BIND dn=\"%s\" method=%ld\n",
+ op->o_log_prefix, op->o_req_dn.bv_val,
+ (unsigned long) op->orb_method, 0, 0 );
- send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
- return;
+ if ( version < LDAP_VERSION_MIN || version > LDAP_VERSION_MAX ) {
+ Debug( LDAP_DEBUG_ANY, "do_bind: unknown version=%ld\n",
+ (unsigned long) version, 0, 0 );
+ send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR,
+ "requested protocol version not supported" );
+ goto cleanup;
+
+ } else if (!( global_allows & SLAP_ALLOW_BIND_V2 ) &&
+ version < LDAP_VERSION3 )
+ {
+ send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR,
+ "historical protocol version requested, use LDAPv3 instead" );
+ goto cleanup;
}
/*
- * We could be serving multiple database backends. Select the
- * appropriate one, or send a referral to our "referral server"
- * if we don't hold it.
+ * we set connection version regardless of whether bind succeeds or not.
*/
+ ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
+ op->o_conn->c_protocol = version;
+ ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
- if ( (be = select_backend( ndn )) == NULL ) {
- free( cdn );
- free( ndn );
- if ( cred.bv_val != NULL ) {
- free( cred.bv_val );
+ op->orb_tmp_mech = mech;
+
+ op->o_bd = frontendDB;
+ rs->sr_err = frontendDB->be_bind( op, rs );
+
+cleanup:
+ if ( rs->sr_err == LDAP_SUCCESS ) {
+ if ( op->orb_method != LDAP_AUTH_SASL ) {
+ ber_dupbv( &op->o_conn->c_authmech, &mech );
}
- if ( cred.bv_len == 0 ) {
- ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+ op->o_conn->c_authtype = op->orb_method;
+ }
- conn->c_protocol = version;
+ if( !BER_BVISNULL( &op->o_req_dn ) ) {
+ slap_sl_free( op->o_req_dn.bv_val, op->o_tmpmemctx );
+ BER_BVZERO( &op->o_req_dn );
+ }
+ if( !BER_BVISNULL( &op->o_req_ndn ) ) {
+ slap_sl_free( op->o_req_ndn.bv_val, op->o_tmpmemctx );
+ BER_BVZERO( &op->o_req_ndn );
+ }
- if ( conn->c_cdn != NULL ) {
- free( conn->c_cdn );
- conn->c_cdn = NULL;
- }
+ return rs->sr_err;
+}
- if ( conn->c_dn != NULL ) {
- free( conn->c_dn );
- conn->c_dn = NULL;
- }
+int
+fe_op_bind( Operation *op, SlapReply *rs )
+{
+ BackendDB *bd = op->o_bd;
+
+ /* check for inappropriate controls */
+ if( get_manageDSAit( op ) == SLAP_CONTROL_CRITICAL ) {
+ send_ldap_error( op, rs,
+ LDAP_UNAVAILABLE_CRITICAL_EXTENSION,
+ "manageDSAit control inappropriate" );
+ goto cleanup;
+ }
- ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+ /* Set the bindop for the benefit of in-directory SASL lookups */
+ op->o_conn->c_sasl_bindop = op;
+
+ if ( op->orb_method == LDAP_AUTH_SASL ) {
+ if ( op->o_protocol < LDAP_VERSION3 ) {
+ Debug( LDAP_DEBUG_ANY, "do_bind: sasl with LDAPv%ld\n",
+ (unsigned long)op->o_protocol, 0, 0 );
+ send_ldap_discon( op, rs,
+ LDAP_PROTOCOL_ERROR, "SASL bind requires LDAPv3" );
+ rs->sr_err = SLAPD_DISCONNECT;
+ goto cleanup;
+ }
- send_ldap_result( conn, op, LDAP_SUCCESS,
- NULL, NULL );
- } else if ( default_referral && *default_referral ) {
- send_ldap_result( conn, op, LDAP_PARTIAL_RESULTS,
- NULL, default_referral );
- } else {
- send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
- NULL, default_referral );
+ if( BER_BVISNULL( &op->orb_tmp_mech ) || BER_BVISEMPTY( &op->orb_tmp_mech ) ) {
+ Debug( LDAP_DEBUG_ANY,
+ "do_bind: no sasl mechanism provided\n",
+ 0, 0, 0 );
+ send_ldap_error( op, rs, LDAP_AUTH_METHOD_NOT_SUPPORTED,
+ "no SASL mechanism provided" );
+ goto cleanup;
}
- return;
- }
- if ( be->be_bind ) {
- /* alias suffix */
- char *edn;
+ /* check restrictions */
+ if( backend_check_restrictions( op, rs, &op->orb_tmp_mech ) != LDAP_SUCCESS ) {
+ send_ldap_result( op, rs );
+ goto cleanup;
+ }
- ndn = suffixAlias( ndn, op, be );
+ ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
+ if ( op->o_conn->c_sasl_bind_in_progress ) {
+ if( !bvmatch( &op->o_conn->c_sasl_bind_mech, &op->orb_tmp_mech ) ) {
+ /* mechanism changed between bind steps */
+ slap_sasl_reset(op->o_conn);
+ }
+ } else {
+ ber_dupbv(&op->o_conn->c_sasl_bind_mech, &op->orb_tmp_mech);
+ }
+ ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
- if ( (*be->be_bind)( be, conn, op, ndn, method, NULL, &cred, &edn ) == 0 ) {
- ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+ rs->sr_err = slap_sasl_bind( op, rs );
- conn->c_protocol = version;
+ goto cleanup;
- if ( conn->c_cdn != NULL ) {
- free( conn->c_cdn );
- }
+ } else {
+ /* Not SASL, cancel any in-progress bind */
+ ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
- conn->c_cdn = cdn;
- cdn = NULL;
+ if ( !BER_BVISNULL( &op->o_conn->c_sasl_bind_mech ) ) {
+ free( op->o_conn->c_sasl_bind_mech.bv_val );
+ BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
+ }
+ op->o_conn->c_sasl_bind_in_progress = 0;
- if ( conn->c_dn != NULL ) {
- free( conn->c_dn );
- }
+ slap_sasl_reset( op->o_conn );
+ ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
+ }
+
+ if ( op->orb_method == LDAP_AUTH_SIMPLE ) {
+ BER_BVSTR( &op->orb_tmp_mech, "SIMPLE" );
+ /* accept "anonymous" binds */
+ if ( BER_BVISEMPTY( &op->orb_cred ) || BER_BVISEMPTY( &op->o_req_ndn ) ) {
+ rs->sr_err = LDAP_SUCCESS;
+
+ if( !BER_BVISEMPTY( &op->orb_cred ) &&
+ !( global_allows & SLAP_ALLOW_BIND_ANON_CRED ))
+ {
+ /* cred is not empty, disallow */
+ rs->sr_err = LDAP_INVALID_CREDENTIALS;
+
+ } else if ( !BER_BVISEMPTY( &op->o_req_ndn ) &&
+ !( global_allows & SLAP_ALLOW_BIND_ANON_DN ))
+ {
+ /* DN is not empty, disallow */
+ rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+ rs->sr_text =
+ "unauthenticated bind (DN with no password) disallowed";
+
+ } else if ( global_disallows & SLAP_DISALLOW_BIND_ANON ) {
+ /* disallow */
+ rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
+ rs->sr_text = "anonymous bind disallowed";
- if(edn != NULL) {
- conn->c_dn = edn;
} else {
- conn->c_dn = ndn;
- ndn = NULL;
+ backend_check_restrictions( op, rs, &op->orb_tmp_mech );
}
- Debug( LDAP_DEBUG_TRACE, "do_bind: bound \"%s\" to \"%s\"\n",
- conn->c_cdn, conn->c_dn, method );
+ /*
+ * we already forced connection to "anonymous",
+ * just need to send success
+ */
+ send_ldap_result( op, rs );
+ Debug( LDAP_DEBUG_TRACE, "do_bind: v%d anonymous bind\n",
+ op->o_protocol, 0, 0 );
+ goto cleanup;
+
+ } else if ( global_disallows & SLAP_DISALLOW_BIND_SIMPLE ) {
+ /* disallow simple authentication */
+ rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+ rs->sr_text = "unwilling to perform simple authentication";
+
+ send_ldap_result( op, rs );
+ Debug( LDAP_DEBUG_TRACE,
+ "do_bind: v%d simple bind(%s) disallowed\n",
+ op->o_protocol, op->o_req_ndn.bv_val, 0 );
+ goto cleanup;
+ }
+
+#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
+ } else if ( op->orb_method == LDAP_AUTH_KRBV41 ) {
+ if ( global_disallows & SLAP_DISALLOW_BIND_KRBV4 ) {
+ /* disallow krbv4 authentication */
+ rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+ rs->sr_text = "unwilling to perform Kerberos V4 bind";
+
+ send_ldap_result( op, rs );
+
+ Debug( LDAP_DEBUG_TRACE,
+ "do_bind: v%d Kerberos V4 (step 1) bind refused\n",
+ op->o_protocol, 0, 0 );
+ goto cleanup;
+ }
+ BER_BVSTR( &op->orb_tmp_mech, "KRBV4" );
+
+ } else if ( op->orb_method == LDAP_AUTH_KRBV42 ) {
+ rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
+ rs->sr_text = "Kerberos V4 (step 2) bind not supported";
+ send_ldap_result( op, rs );
+
+ Debug( LDAP_DEBUG_TRACE,
+ "do_bind: v%d Kerberos V4 (step 2) bind refused\n",
+ op->o_protocol, 0, 0 );
+ goto cleanup;
+#endif
+
+ } else {
+ rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
+ rs->sr_text = "unknown authentication method";
+
+ send_ldap_result( op, rs );
+ Debug( LDAP_DEBUG_TRACE,
+ "do_bind: v%d unknown authentication method (%d)\n",
+ op->o_protocol, op->orb_method, 0 );
+ goto cleanup;
+ }
+
+ /*
+ * We could be serving multiple database backends. Select the
+ * appropriate one, or send a referral to our "referral server"
+ * if we don't hold it.
+ */
+
+ if ( (op->o_bd = select_backend( &op->o_req_ndn, 0, 0 )) == NULL ) {
+ /* don't return referral for bind requests */
+ /* noSuchObject is not allowed to be returned by bind */
+ rs->sr_err = LDAP_INVALID_CREDENTIALS;
+ op->o_bd = bd;
+ send_ldap_result( op, rs );
+ goto cleanup;
+ }
+
+ /* check restrictions */
+ if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
+ send_ldap_result( op, rs );
+ goto cleanup;
+ }
+
+ if( op->o_bd->be_bind ) {
+ op->o_conn->c_authz_cookie = NULL;
- ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+ rs->sr_err = (op->o_bd->be_bind)( op, rs );
- /* send this here to avoid a race condition */
- send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
+ if ( rs->sr_err == 0 ) {
+ (void)fe_op_bind_success( op, rs );
- } else if (edn != NULL) {
- free( edn );
+ } else if ( !BER_BVISNULL( &op->orb_edn ) ) {
+ free( op->orb_edn.bv_val );
+ BER_BVZERO( &op->orb_edn );
}
} else {
- send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM, NULL,
- "Function not implemented" );
+ send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
+ "operation not supported within naming context" );
}
- if( cdn != NULL ) {
- free( cdn );
+cleanup:;
+ op->o_bd = bd;
+ return rs->sr_err;
+}
+
+int
+fe_op_bind_success( Operation *op, SlapReply *rs )
+{
+ ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
+
+ if( op->o_conn->c_authz_backend == NULL ) {
+ op->o_conn->c_authz_backend = op->o_bd;
}
- if( ndn != NULL ) {
- free( ndn );
+
+ /* be_bind returns regular/global edn */
+ if( !BER_BVISEMPTY( &op->orb_edn ) ) {
+ op->o_conn->c_dn = op->orb_edn;
+ } else {
+ ber_dupbv(&op->o_conn->c_dn, &op->o_req_dn);
}
- if ( cred.bv_val != NULL ) {
- free( cred.bv_val );
+
+ ber_dupbv( &op->o_conn->c_ndn, &op->o_req_ndn );
+
+ if( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
+ ber_len_t max = sockbuf_max_incoming_auth;
+ ber_sockbuf_ctrl( op->o_conn->c_sb,
+ LBER_SB_OPT_SET_MAX_INCOMING, &max );
}
+
+ /* log authorization identity */
+ Statslog( LDAP_DEBUG_STATS,
+ "%s BIND dn=\"%s\" mech=%s ssf=0\n",
+ op->o_log_prefix,
+ op->o_conn->c_dn.bv_val, op->orb_tmp_mech.bv_val, 0, 0 );
+
+ Debug( LDAP_DEBUG_TRACE,
+ "do_bind: v%d bind: \"%s\" to \"%s\"\n",
+ op->o_protocol, op->o_req_dn.bv_val, op->o_conn->c_dn.bv_val );
+
+ ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
+
+ /* send this here to avoid a race condition */
+ send_ldap_result( op, rs );
+
+ return LDAP_SUCCESS;
}
projects / openldap / blobdiff