/* bind.c - decode an ldap bind operation and pass it to a backend db */ /* $OpenLDAP$ */ /* * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved. * COPYING RESTRICTIONS APPLY, see COPYRIGHT file */ /* * Copyright (c) 1995 Regents of the University of Michigan. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that this notice is preserved and that due credit is given * to the University of Michigan at Ann Arbor. The name of the University * may not be used to endorse or promote products derived from this * software without specific prior written permission. This software * is provided ``as is'' without express or implied warranty. */ #include "portable.h" #include #include #include #include "ldap_pvt.h" #include "slap.h" #ifdef LDAP_SLAPI #include "slapi.h" #endif int do_bind( Operation *op, SlapReply *rs ) { BerElement *ber = op->o_ber; ber_int_t version; ber_tag_t method; struct berval mech = { 0, NULL }; struct berval dn = { 0, NULL }; ber_tag_t tag; Backend *be; #ifdef LDAP_SLAPI Slapi_PBlock *pb = op->o_pb; #endif #ifdef NEW_LOGGING LDAP_LOG( OPERATION, ENTRY, "do_bind: conn %d\n", op->o_connid, 0, 0 ); #else Debug( LDAP_DEBUG_TRACE, "do_bind\n", 0, 0, 0 ); #endif /* * 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; /* log authorization identity demotion */ if ( op->o_conn->c_dn.bv_len ) { Statslog( LDAP_DEBUG_STATS, "conn=%lu op=%lu BIND anonymous mech=implicit ssf=0", op->o_connid, op->o_opid, 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 ( op->o_dn.bv_val != NULL ) { free( op->o_dn.bv_val ); op->o_dn.bv_val = ch_strdup( "" ); op->o_dn.bv_len = 0; } if ( op->o_ndn.bv_val != NULL ) { free( op->o_ndn.bv_val ); op->o_ndn.bv_val = ch_strdup( "" ); op->o_ndn.bv_len = 0; } /* * Parse the bind request. It looks like this: * * BindRequest ::= SEQUENCE { * version INTEGER, -- version * name DistinguishedName, -- dn * authentication CHOICE { * simple [0] OCTET STRING -- passwd * krbv42ldap [1] OCTET STRING * krbv42dsa [2] OCTET STRING * SASL [3] SaslCredentials * } * } * * SaslCredentials ::= SEQUENCE { * mechanism LDAPString, * credentials OCTET STRING OPTIONAL * } */ tag = ber_scanf( ber, "{imt" /*}*/, &version, &dn, &method ); if ( tag == LBER_ERROR ) { #ifdef NEW_LOGGING LDAP_LOG( OPERATION, ERR, "do_bind: conn %d ber_scanf failed\n", op->o_connid, 0, 0 ); #else Debug( LDAP_DEBUG_ANY, "bind: ber_scanf failed\n", 0, 0, 0 ); #endif send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" ); rs->sr_err = -1; goto cleanup; } op->o_protocol = version; if( method != LDAP_AUTH_SASL ) { tag = ber_scanf( ber, /*{*/ "m}", &op->orb_cred ); } else { tag = ber_scanf( ber, "{m" /*}*/, &mech ); if ( tag != LBER_ERROR ) { ber_len_t len; tag = ber_peek_tag( ber, &len ); if ( tag == LDAP_TAG_LDAPCRED ) { tag = ber_scanf( ber, "m", &op->orb_cred ); } else { tag = LDAP_TAG_LDAPCRED; op->orb_cred.bv_val = NULL; op->orb_cred.bv_len = 0; } if ( tag != LBER_ERROR ) { tag = ber_scanf( ber, /*{{*/ "}}" ); } } } if ( tag == LBER_ERROR ) { send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" ); rs->sr_err = SLAPD_DISCONNECT; goto cleanup; } if( get_ctrls( op, rs, 1 ) != LDAP_SUCCESS ) { #ifdef NEW_LOGGING LDAP_LOG( OPERATION, INFO, "do_bind: conn %d get_ctrls failed\n", op->o_connid, 0, 0 ); #else Debug( LDAP_DEBUG_ANY, "do_bind: get_ctrls failed\n", 0, 0, 0 ); #endif goto cleanup; } rs->sr_err = dnPrettyNormal( NULL, &dn, &op->o_req_dn, &op->o_req_ndn ); if ( rs->sr_err != LDAP_SUCCESS ) { #ifdef NEW_LOGGING LDAP_LOG( OPERATION, INFO, "do_bind: conn %d invalid dn (%s)\n", op->o_connid, dn.bv_val, 0 ); #else Debug( LDAP_DEBUG_ANY, "bind: invalid dn (%s)\n", dn.bv_val, 0, 0 ); #endif send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid DN" ); goto cleanup; } if( method == LDAP_AUTH_SASL ) { #ifdef NEW_LOGGING LDAP_LOG( OPERATION, DETAIL1, "do_sasl_bind: conn %d dn (%s) mech %s\n", op->o_connid, op->o_req_dn.bv_val, mech.bv_val ); #else Debug( LDAP_DEBUG_TRACE, "do_sasl_bind: dn (%s) mech %s\n", op->o_req_dn.bv_val, mech.bv_val, NULL ); #endif } else { #ifdef NEW_LOGGING LDAP_LOG( OPERATION, DETAIL1, "do_bind: version=%ld dn=\"%s\" method=%ld\n", (unsigned long) version, op->o_req_dn.bv_val, (unsigned long)method ); #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) method ); #endif } Statslog( LDAP_DEBUG_STATS, "conn=%lu op=%lu BIND dn=\"%s\" method=%ld\n", op->o_connid, op->o_opid, op->o_req_dn.bv_val, (unsigned long) method, 0 ); if ( version < LDAP_VERSION_MIN || version > LDAP_VERSION_MAX ) { #ifdef NEW_LOGGING LDAP_LOG( OPERATION, INFO, "do_bind: conn %d unknown version = %ld\n", op->o_connid, (unsigned long)version, 0 ); #else Debug( LDAP_DEBUG_ANY, "do_bind: unknown version=%ld\n", (unsigned long) version, 0, 0 ); #endif 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 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 ); /* check for inappropriate controls */ if( get_manageDSAit( op ) == SLAP_CRITICAL_CONTROL ) { send_ldap_error( op, rs, LDAP_UNAVAILABLE_CRITICAL_EXTENSION, "manageDSAit control inappropriate" ); goto cleanup; } /* Set the bindop for the benefit of in-directory SASL lookups */ op->o_conn->c_sasl_bindop = op; if ( method == LDAP_AUTH_SASL ) { if ( version < LDAP_VERSION3 ) { #ifdef NEW_LOGGING LDAP_LOG( OPERATION, INFO, "do_bind: conn %d sasl with LDAPv%ld\n", op->o_connid, (unsigned long)version , 0 ); #else Debug( LDAP_DEBUG_ANY, "do_bind: sasl with LDAPv%ld\n", (unsigned long) version, 0, 0 ); #endif send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "SASL bind requires LDAPv3" ); rs->sr_err = SLAPD_DISCONNECT; goto cleanup; } if( mech.bv_len == 0 ) { #ifdef NEW_LOGGING LDAP_LOG( OPERATION, INFO, "do_bind: conn %d no SASL mechanism provided\n", op->o_connid, 0, 0 ); #else Debug( LDAP_DEBUG_ANY, "do_bind: no sasl mechanism provided\n", 0, 0, 0 ); #endif send_ldap_error( op, rs, LDAP_AUTH_METHOD_NOT_SUPPORTED, "no SASL mechanism provided" ); goto cleanup; } /* check restrictions */ if( backend_check_restrictions( op, rs, &mech ) != LDAP_SUCCESS ) { send_ldap_result( op, rs ); goto cleanup; } 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, &mech ) ) { /* mechanism changed between bind steps */ slap_sasl_reset(op->o_conn); } } else { ber_dupbv(&op->o_conn->c_sasl_bind_mech, &mech); } ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex ); rs->sr_err = slap_sasl_bind( op, rs ); ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex ); if( rs->sr_err == LDAP_SUCCESS ) { op->o_conn->c_dn = op->orb_edn; if( op->orb_edn.bv_len != 0 ) { /* edn is always normalized already */ ber_dupbv( &op->o_conn->c_ndn, &op->o_conn->c_dn ); } op->o_conn->c_authmech = op->o_conn->c_sasl_bind_mech; op->o_conn->c_sasl_bind_mech.bv_val = NULL; op->o_conn->c_sasl_bind_mech.bv_len = 0; op->o_conn->c_sasl_bind_in_progress = 0; op->o_conn->c_sasl_ssf = op->orb_ssf; if( op->orb_ssf > op->o_conn->c_ssf ) { op->o_conn->c_ssf = op->orb_ssf; } if( op->o_conn->c_dn.bv_len != 0 ) { 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, "conn=%lu op=%lu BIND dn=\"%s\" mech=%s ssf=%d\n", op->o_connid, op->o_opid, op->o_conn->c_dn.bv_val ? op->o_conn->c_dn.bv_val : "", op->o_conn->c_authmech.bv_val, op->orb_ssf ); #ifdef NEW_LOGGING LDAP_LOG( OPERATION, DETAIL1, "do_bind: SASL/%s bind: dn=\"%s\" ssf=%d\n", op->o_conn->c_authmech.bv_val, op->o_conn->c_dn.bv_val ? op->o_conn->c_dn.bv_val : "", op->orb_ssf ); #else Debug( LDAP_DEBUG_TRACE, "do_bind: SASL/%s bind: dn=\"%s\" ssf=%d\n", op->o_conn->c_authmech.bv_val, op->o_conn->c_dn.bv_val ? op->o_conn->c_dn.bv_val : "", op->orb_ssf ); #endif } else if ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS ) { op->o_conn->c_sasl_bind_in_progress = 1; } else { if ( op->o_conn->c_sasl_bind_mech.bv_val ) { free( op->o_conn->c_sasl_bind_mech.bv_val ); op->o_conn->c_sasl_bind_mech.bv_val = NULL; op->o_conn->c_sasl_bind_mech.bv_len = 0; } op->o_conn->c_sasl_bind_in_progress = 0; } ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex ); goto cleanup; } else { /* Not SASL, cancel any in-progress bind */ ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex ); if ( op->o_conn->c_sasl_bind_mech.bv_val != NULL ) { free(op->o_conn->c_sasl_bind_mech.bv_val); op->o_conn->c_sasl_bind_mech.bv_val = NULL; op->o_conn->c_sasl_bind_mech.bv_len = 0; } op->o_conn->c_sasl_bind_in_progress = 0; slap_sasl_reset( op->o_conn ); ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex ); } if ( method == LDAP_AUTH_SIMPLE ) { /* accept "anonymous" binds */ if ( op->orb_cred.bv_len == 0 || op->o_req_ndn.bv_len == 0 ) { rs->sr_err = LDAP_SUCCESS; if( op->orb_cred.bv_len && !( global_allows & SLAP_ALLOW_BIND_ANON_CRED )) { /* cred is not empty, disallow */ rs->sr_err = LDAP_INVALID_CREDENTIALS; } else if ( op->o_req_ndn.bv_len && !( 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"; } else { backend_check_restrictions( op, rs, &mech ); } /* * we already forced connection to "anonymous", * just need to send success */ send_ldap_result( op, rs ); #ifdef NEW_LOGGING LDAP_LOG( OPERATION, DETAIL1, "do_bind: conn %d v%d anonymous bind\n", op->o_connid, version , 0 ); #else Debug( LDAP_DEBUG_TRACE, "do_bind: v%d anonymous bind\n", version, 0, 0 ); #endif 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 ); #ifdef NEW_LOGGING LDAP_LOG( OPERATION, INFO, "do_bind: conn %d v%d simple bind(%s) disallowed\n", op->o_connid, version, op->o_req_ndn.bv_val ); #else Debug( LDAP_DEBUG_TRACE, "do_bind: v%d simple bind(%s) disallowed\n", version, op->o_req_ndn.bv_val, 0 ); #endif goto cleanup; } else if (( global_disallows & SLAP_DISALLOW_BIND_SIMPLE_UNPROTECTED ) && ( op->o_ssf <= 1 )) { rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED; rs->sr_text = "unwilling to perform simple authentication " "without confidentilty protection"; send_ldap_result( op, rs ); #ifdef NEW_LOGGING LDAP_LOG( OPERATION, INFO, "do_bind: conn %d " "v%d unprotected simple bind(%s) disallowed\n", op->o_connid, version, op->o_req_ndn.bv_val ); #else Debug( LDAP_DEBUG_TRACE, "do_bind: v%d unprotected simple bind(%s) disallowed\n", version, op->o_req_ndn.bv_val, 0 ); #endif goto cleanup; } #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND } else if ( method == LDAP_AUTH_KRBV41 || method == LDAP_AUTH_KRBV42 ) { if ( global_disallows & SLAP_DISALLOW_BIND_KRBV4 ) { /* disallow simple authentication */ rs->sr_err = LDAP_UNWILLING_TO_PERFORM; rs->sr_text = "unwilling to perform Kerberos V4 bind"; send_ldap_result( op, rs ); #ifdef NEW_LOGGING LDAP_LOG( OPERATION, DETAIL1, "do_bind: conn %d v%d Kerberos V4 bind\n", op->o_connid, version , 0 ); #else Debug( LDAP_DEBUG_TRACE, "do_bind: v%d Kerberos V4 bind\n", version, 0, 0 ); #endif goto cleanup; } #endif } else { rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED; rs->sr_text = "unknown authentication method"; send_ldap_result( op, rs ); #ifdef NEW_LOGGING LDAP_LOG( OPERATION, INFO, "do_bind: conn %ld v%d unknown authentication method (%ld)\n", op->o_connid, version, method ); #else Debug( LDAP_DEBUG_TRACE, "do_bind: v%d unknown authentication method (%ld)\n", version, method, 0 ); #endif 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 ) { if ( default_referral ) { rs->sr_ref = referral_rewrite( default_referral, NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT ); if (!rs->sr_ref) rs->sr_ref = default_referral; rs->sr_err = LDAP_REFERRAL; send_ldap_result( op, rs ); if (rs->sr_ref != default_referral) ber_bvarray_free( rs->sr_ref ); } else { /* noSuchObject is not allowed to be returned by bind */ rs->sr_err = LDAP_INVALID_CREDENTIALS; 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 defined( LDAP_SLAPI ) slapi_x_pblock_set_operation( pb, op ); slapi_pblock_set( pb, SLAPI_BIND_TARGET, (void *)dn.bv_val ); slapi_pblock_set( pb, SLAPI_BIND_METHOD, (void *)method ); slapi_pblock_set( pb, SLAPI_BIND_CREDENTIALS, (void *)&op->orb_cred ); slapi_pblock_set( pb, SLAPI_MANAGEDSAIT, (void *)(0) ); rs->sr_err = doPluginFNs( op->o_bd, SLAPI_PLUGIN_PRE_BIND_FN, pb ); if ( rs->sr_err != SLAPI_BIND_SUCCESS ) { /* * Binding is a special case for SLAPI plugins. It is * possible for a bind plugin to be successful *and* * abort further processing; this means it has handled * a bind request authoritatively. If we have reached * here, a result has been sent to the client (XXX * need to check with Sun whether SLAPI_BIND_ANONYMOUS * means a result has been sent). */ int ldapRc; if ( slapi_pblock_get( pb, SLAPI_RESULT_CODE, (void *)&ldapRc ) != 0 ) ldapRc = LDAP_OTHER; op->orb_edn.bv_val = NULL; op->orb_edn.bv_len = 0; if ( rs->sr_err != SLAPI_BIND_FAIL && ldapRc == LDAP_SUCCESS ) { /* Set the new connection DN. */ if ( rs->sr_err != SLAPI_BIND_ANONYMOUS ) { slapi_pblock_get( pb, SLAPI_CONN_DN, (void *)&op->orb_edn.bv_val ); } rs->sr_err = dnPrettyNormal( NULL, &op->orb_edn, &op->o_req_dn, &op->o_req_ndn ); ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex ); op->o_conn->c_dn = op->o_req_dn; op->o_conn->c_ndn = op->o_req_ndn; op->o_req_dn.bv_val = NULL; op->o_req_dn.bv_len = 0; op->o_req_ndn.bv_val = NULL; op->o_req_ndn.bv_len = 0; if ( op->o_conn->c_dn.bv_len != 0 ) { 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, "conn=%lu op=%lu BIND dn=\"%s\" mech=simple (SLAPI) ssf=0\n", op->o_connid, op->o_opid, op->o_conn->c_dn.bv_val, 0, 0 ); ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex ); } #ifdef NEW_LOGGING LDAP_LOG( OPERATION, INFO, "do_bind: Bind preoperation plugin returned %d\n", rs->sr_err, 0, 0); #else Debug(LDAP_DEBUG_TRACE, "do_bind: Bind preoperation plugin returned %d.\n", rs->sr_err, 0, 0); #endif rs->sr_err = ldapRc; goto cleanup; } #endif /* defined( LDAP_SLAPI ) */ if ( op->o_bd->be_bind ) { op->orb_method = method; rs->sr_err = (op->o_bd->be_bind)( op, rs ); if ( rs->sr_err == 0 ) { 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(op->orb_edn.bv_len) { op->o_conn->c_dn = op->orb_edn; } else { op->o_conn->c_dn = op->o_req_dn; op->o_req_dn.bv_val = NULL; op->o_req_dn.bv_len = 0; } op->o_conn->c_ndn = op->o_req_ndn; op->o_req_ndn.bv_val = NULL; op->o_req_ndn.bv_len = 0; if( op->o_conn->c_dn.bv_len != 0 ) { 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, "conn=%lu op=%lu BIND dn=\"%s\" mech=simple ssf=0\n", op->o_connid, op->o_opid, op->o_conn->c_dn.bv_val, 0, 0 ); #ifdef NEW_LOGGING LDAP_LOG( OPERATION, DETAIL1, "do_bind: v%d bind: \"%s\" to \"%s\" \n", version, op->o_conn->c_dn.bv_val, op->o_conn->c_dn.bv_val ); #else Debug( LDAP_DEBUG_TRACE, "do_bind: v%d bind: \"%s\" to \"%s\"\n", version, dn.bv_val, op->o_conn->c_dn.bv_val ); #endif ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex ); /* send this here to avoid a race condition */ send_ldap_result( op, rs ); } else if (op->orb_edn.bv_val != NULL) { free( op->orb_edn.bv_val ); } } else { send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM, "operation not supported within namingContext" ); } #if defined( LDAP_SLAPI ) if ( doPluginFNs( op->o_bd, SLAPI_PLUGIN_POST_BIND_FN, pb ) != 0 ) { #ifdef NEW_LOGGING LDAP_LOG( OPERATION, INFO, "do_bind: Bind postoperation plugins failed\n", 0, 0, 0); #else Debug(LDAP_DEBUG_TRACE, "do_bind: Bind postoperation plugins failed.\n", 0, 0, 0); #endif } #endif /* defined( LDAP_SLAPI ) */ cleanup: op->o_conn->c_sasl_bindop = NULL; if( op->o_req_dn.bv_val != NULL ) { free( op->o_req_dn.bv_val ); op->o_req_dn.bv_val = NULL; } if( op->o_req_ndn.bv_val != NULL ) { free( op->o_req_ndn.bv_val ); op->o_req_ndn.bv_val = NULL; } return rs->sr_err; }