/* $NetBSD: extended.c,v 1.1.1.6.6.1 2019/08/10 06:17:17 martin Exp $ */ /* $OpenLDAP$ */ /* This work is part of OpenLDAP Software . * * Copyright 1999-2019 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 * . */ /* * LDAPv3 Extended Operation Request * ExtendedRequest ::= [APPLICATION 23] SEQUENCE { * requestName [0] LDAPOID, * requestValue [1] OCTET STRING OPTIONAL * } * * LDAPv3 Extended Operation Response * ExtendedResponse ::= [APPLICATION 24] SEQUENCE { * COMPONENTS OF LDAPResult, * responseName [10] LDAPOID OPTIONAL, * response [11] OCTET STRING OPTIONAL * } * */ #include __RCSID("$NetBSD: extended.c,v 1.1.1.6.6.1 2019/08/10 06:17:17 martin Exp $"); #include "portable.h" #include #include #include #include "slap.h" #include "lber_pvt.h" static struct extop_list { struct extop_list *next; struct berval oid; slap_mask_t flags; SLAP_EXTOP_MAIN_FN *ext_main; } *supp_ext_list = NULL; static SLAP_EXTOP_MAIN_FN whoami_extop; /* This list of built-in extops is for extops that are not part * of backends or in external modules. Essentially, this is * just a way to get built-in extops onto the extop list without * having a separate init routine for each built-in extop. */ static struct { const struct berval *oid; slap_mask_t flags; SLAP_EXTOP_MAIN_FN *ext_main; } builtin_extops[] = { #ifdef LDAP_X_TXN { &slap_EXOP_TXN_START, 0, txn_start_extop }, { &slap_EXOP_TXN_END, 0, txn_end_extop }, #endif { &slap_EXOP_CANCEL, 0, cancel_extop }, { &slap_EXOP_WHOAMI, 0, whoami_extop }, { &slap_EXOP_MODIFY_PASSWD, SLAP_EXOP_WRITES, passwd_extop }, { NULL, 0, NULL } }; static struct extop_list *find_extop( struct extop_list *list, struct berval *oid ); struct berval * get_supported_extop (int index) { struct extop_list *ext; /* linear scan is slow, but this way doesn't force a * big change on root_dse.c, where this routine is used. */ for (ext = supp_ext_list; ext != NULL && --index >= 0; ext = ext->next) { ; /* empty */ } if (ext == NULL) return NULL; return &ext->oid; } int exop_root_dse_info( Entry *e ) { AttributeDescription *ad_supportedExtension = slap_schema.si_ad_supportedExtension; struct berval vals[2]; struct extop_list *ext; vals[1].bv_val = NULL; vals[1].bv_len = 0; for (ext = supp_ext_list; ext != NULL; ext = ext->next) { if( ext->flags & SLAP_EXOP_HIDE ) continue; vals[0] = ext->oid; if( attr_merge( e, ad_supportedExtension, vals, NULL ) ) { return LDAP_OTHER; } } return LDAP_SUCCESS; } int do_extended( Operation *op, SlapReply *rs ) { struct berval reqdata = {0, NULL}; ber_len_t len; Debug( LDAP_DEBUG_TRACE, "%s do_extended\n", op->o_log_prefix, 0, 0 ); if( op->o_protocol < LDAP_VERSION3 ) { Debug( LDAP_DEBUG_ANY, "%s do_extended: protocol version (%d) too low\n", op->o_log_prefix, op->o_protocol, 0 ); send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "requires LDAPv3" ); rs->sr_err = SLAPD_DISCONNECT; goto done; } if ( ber_scanf( op->o_ber, "{m" /*}*/, &op->ore_reqoid ) == LBER_ERROR ) { Debug( LDAP_DEBUG_ANY, "%s do_extended: ber_scanf failed\n", op->o_log_prefix, 0, 0 ); send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" ); rs->sr_err = SLAPD_DISCONNECT; goto done; } if( ber_peek_tag( op->o_ber, &len ) == LDAP_TAG_EXOP_REQ_VALUE ) { if( ber_scanf( op->o_ber, "m", &reqdata ) == LBER_ERROR ) { Debug( LDAP_DEBUG_ANY, "%s do_extended: ber_scanf failed\n", op->o_log_prefix, 0, 0 ); send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" ); rs->sr_err = SLAPD_DISCONNECT; goto done; } } if( get_ctrls( op, rs, 1 ) != LDAP_SUCCESS ) { Debug( LDAP_DEBUG_ANY, "%s do_extended: get_ctrls failed\n", op->o_log_prefix, 0, 0 ); return rs->sr_err; } Statslog( LDAP_DEBUG_STATS, "%s EXT oid=%s\n", op->o_log_prefix, op->ore_reqoid.bv_val, 0, 0, 0 ); /* check for controls inappropriate for all extended operations */ if( get_manageDSAit( op ) == SLAP_CONTROL_CRITICAL ) { send_ldap_error( op, rs, LDAP_UNAVAILABLE_CRITICAL_EXTENSION, "manageDSAit control inappropriate" ); goto done; } /* FIXME: temporary? */ if ( reqdata.bv_val ) { op->ore_reqdata = &reqdata; } op->o_bd = frontendDB; rs->sr_err = frontendDB->be_extended( op, rs ); /* clean up in case some overlay set them? */ if ( !BER_BVISNULL( &op->o_req_ndn ) ) { if ( !BER_BVISNULL( &op->o_req_dn ) && op->o_req_ndn.bv_val != op->o_req_dn.bv_val ) { op->o_tmpfree( op->o_req_dn.bv_val, op->o_tmpmemctx ); } op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx ); BER_BVZERO( &op->o_req_dn ); BER_BVZERO( &op->o_req_ndn ); } done: return rs->sr_err; } int fe_extended( Operation *op, SlapReply *rs ) { struct extop_list *ext = NULL; struct berval reqdata = BER_BVNULL; if (op->ore_reqdata) { reqdata = *op->ore_reqdata; } ext = find_extop(supp_ext_list, &op->ore_reqoid ); if ( ext == NULL ) { Debug( LDAP_DEBUG_ANY, "%s do_extended: unsupported operation \"%s\"\n", op->o_log_prefix, op->ore_reqoid.bv_val, 0 ); send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "unsupported extended operation" ); goto done; } op->ore_flags = ext->flags; Debug( LDAP_DEBUG_ARGS, "do_extended: oid=%s\n", op->ore_reqoid.bv_val, 0 ,0 ); { /* start of OpenLDAP extended operation */ BackendDB *bd = op->o_bd; rs->sr_err = (ext->ext_main)( op, rs ); if( rs->sr_err != SLAPD_ABANDON ) { if ( rs->sr_err == LDAP_REFERRAL && rs->sr_ref == NULL ) { rs->sr_ref = referral_rewrite( default_referral, NULL, NULL, LDAP_SCOPE_DEFAULT ); if ( !rs->sr_ref ) rs->sr_ref = default_referral; if ( !rs->sr_ref ) { rs->sr_err = LDAP_UNWILLING_TO_PERFORM; rs->sr_text = "referral missing"; } } if ( op->o_bd == NULL ) op->o_bd = bd; send_ldap_extended( op, rs ); if ( rs->sr_ref != default_referral ) { ber_bvarray_free( rs->sr_ref ); rs->sr_ref = NULL; } } if ( rs->sr_rspoid != NULL ) { free( (char *)rs->sr_rspoid ); rs->sr_rspoid = NULL; } if ( rs->sr_rspdata != NULL ) { ber_bvfree( rs->sr_rspdata ); rs->sr_rspdata = NULL; } } /* end of OpenLDAP extended operation */ done:; return rs->sr_err; } int load_extop2( const struct berval *ext_oid, slap_mask_t ext_flags, SLAP_EXTOP_MAIN_FN *ext_main, unsigned flags ) { struct berval oidm = BER_BVNULL; struct extop_list *ext; int insertme = 0; if ( !ext_main ) { return -1; } if ( ext_oid == NULL || BER_BVISNULL( ext_oid ) || BER_BVISEMPTY( ext_oid ) ) { return -1; } if ( numericoidValidate( NULL, (struct berval *)ext_oid ) != LDAP_SUCCESS ) { oidm.bv_val = oidm_find( ext_oid->bv_val ); if ( oidm.bv_val == NULL ) { return -1; } oidm.bv_len = strlen( oidm.bv_val ); ext_oid = &oidm; } for ( ext = supp_ext_list; ext; ext = ext->next ) { if ( bvmatch( ext_oid, &ext->oid ) ) { if ( flags == 1 ) { break; } return -1; } } if ( flags == 0 || ext == NULL ) { ext = ch_calloc( 1, sizeof(struct extop_list) + ext_oid->bv_len + 1 ); if ( ext == NULL ) { return(-1); } ext->oid.bv_val = (char *)(ext + 1); AC_MEMCPY( ext->oid.bv_val, ext_oid->bv_val, ext_oid->bv_len ); ext->oid.bv_len = ext_oid->bv_len; ext->oid.bv_val[ext->oid.bv_len] = '\0'; insertme = 1; } ext->flags = ext_flags; ext->ext_main = ext_main; if ( insertme ) { ext->next = supp_ext_list; supp_ext_list = ext; } return(0); } int extops_init (void) { int i; for ( i = 0; builtin_extops[i].oid != NULL; i++ ) { load_extop( (struct berval *)builtin_extops[i].oid, builtin_extops[i].flags, builtin_extops[i].ext_main ); } return(0); } int extops_kill (void) { struct extop_list *ext; /* we allocated the memory, so we have to free it, too. */ while ((ext = supp_ext_list) != NULL) { supp_ext_list = ext->next; ch_free(ext); } return(0); } static struct extop_list * find_extop( struct extop_list *list, struct berval *oid ) { struct extop_list *ext; for (ext = list; ext; ext = ext->next) { if (bvmatch(&ext->oid, oid)) return(ext); } return(NULL); } const struct berval slap_EXOP_WHOAMI = BER_BVC(LDAP_EXOP_WHO_AM_I); static int whoami_extop ( Operation *op, SlapReply *rs ) { struct berval *bv; if ( op->ore_reqdata != NULL ) { /* no request data should be provided */ rs->sr_text = "no request data expected"; return LDAP_PROTOCOL_ERROR; } Statslog( LDAP_DEBUG_STATS, "%s WHOAMI\n", op->o_log_prefix, 0, 0, 0, 0 ); op->o_bd = op->o_conn->c_authz_backend; if( backend_check_restrictions( op, rs, (struct berval *)&slap_EXOP_WHOAMI ) != LDAP_SUCCESS ) { return rs->sr_err; } bv = (struct berval *) ch_malloc( sizeof(struct berval) ); if( op->o_dn.bv_len ) { bv->bv_len = op->o_dn.bv_len + STRLENOF( "dn:" ); bv->bv_val = ch_malloc( bv->bv_len + 1 ); AC_MEMCPY( bv->bv_val, "dn:", STRLENOF( "dn:" ) ); AC_MEMCPY( &bv->bv_val[STRLENOF( "dn:" )], op->o_dn.bv_val, op->o_dn.bv_len ); bv->bv_val[bv->bv_len] = '\0'; } else { bv->bv_len = 0; bv->bv_val = NULL; } rs->sr_rspdata = bv; return LDAP_SUCCESS; }