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Diffstat (limited to '')
| -rw-r--r-- | servers/slapd/extended.c | 406 |
1 files changed, 406 insertions, 0 deletions
diff --git a/servers/slapd/extended.c b/servers/slapd/extended.c new file mode 100644 index 0000000..3ad8842 --- /dev/null +++ b/servers/slapd/extended.c @@ -0,0 +1,406 @@ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1999-2018 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>. + */ + +/* + * 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 "portable.h" + +#include <stdio.h> + +#include <ac/socket.h> +#include <ac/string.h> + +#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; +} |