src/providers/ldap/ldap_common.c


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/*
    SSSD

    LDAP Provider Common Functions

    Authors:
        Simo Sorce <ssorce@redhat.com>

    Copyright (C) 2008-2010 Red Hat

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "providers/ldap/ldap_common.h"
#include "providers/fail_over.h"
#include "providers/ldap/sdap_async_private.h"
#include "providers/krb5/krb5_common.h"
#include "db/sysdb_sudo.h"
#include "db/sysdb_services.h"
#include "db/sysdb_autofs.h"

#include "util/sss_krb5.h"
#include "util/crypto/sss_crypto.h"

#include "providers/ldap/ldap_opts.h"
#include "providers/ldap/sdap_idmap.h"

/* a fd the child process would log into */
int ldap_child_debug_fd = -1;

int
sdap_domain_destructor(void *mem)
{
    struct sdap_domain *dom =
            talloc_get_type(mem, struct sdap_domain);
    DLIST_REMOVE(*(dom->head), dom);
    return 0;
}

struct sdap_domain *
sdap_domain_get(struct sdap_options *opts,
                struct sss_domain_info *dom)
{
    struct sdap_domain *sditer = NULL;

    DLIST_FOR_EACH(sditer, opts->sdom) {
        if (sditer->dom == dom) {
            break;
        }
    }

    return sditer;
}

errno_t
sdap_domain_add(struct sdap_options *opts,
                struct sss_domain_info *dom,
                struct sdap_domain **_sdom)
{
    struct sdap_domain *sdom;

    sdom = talloc_zero(opts, struct sdap_domain);
    if (sdom == NULL) {
        return ENOMEM;
    }
    sdom->dom = dom;
    sdom->head = &opts->sdom;

    if (opts->sdom) {
        /* Only allow subdomains of the parent domain */
        if (dom->parent == NULL ||
            dom->parent != opts->sdom->dom) {
            DEBUG(SSSDBG_OP_FAILURE, ("Domain %s is not a subdomain of %s\n",
                  dom->name, opts->sdom->dom->name));
            return EINVAL;
        }
    }

    talloc_set_destructor((TALLOC_CTX *)sdom, sdap_domain_destructor);
    DLIST_ADD_END(opts->sdom, sdom, struct sdap_domain *);

    if (_sdom) *_sdom = sdom;
    return EOK;
}

void
sdap_domain_remove(struct sdap_options *opts,
                   struct sss_domain_info *dom)
{
    struct sdap_domain *sdom;

    sdom = sdap_domain_get(opts, dom);
    if (sdom == NULL) return;

    DLIST_REMOVE(*(sdom->head), sdom);
}

int ldap_get_options(TALLOC_CTX *memctx,
                     struct sss_domain_info *dom,
                     struct confdb_ctx *cdb,
                     const char *conf_path,
                     struct sdap_options **_opts)
{
    struct sdap_attr_map *default_attr_map;
    struct sdap_attr_map *default_user_map;
    struct sdap_attr_map *default_group_map;
    struct sdap_attr_map *default_netgroup_map;
    struct sdap_attr_map *default_service_map;
    struct sdap_options *opts;
    char *schema;
    const char *search_base;
    const char *pwd_policy;
    int ret;
    int account_cache_expiration;
    int offline_credentials_expiration;
    const char *ldap_deref;
    int ldap_deref_val;
    int o;
    const char *authtok_type;
    struct dp_opt_blob authtok_blob;
    char *cleartext;
    const int search_base_options[] = { SDAP_USER_SEARCH_BASE,
                                        SDAP_GROUP_SEARCH_BASE,
                                        SDAP_NETGROUP_SEARCH_BASE,
                                        SDAP_SERVICE_SEARCH_BASE,
                                        -1 };

    opts = talloc_zero(memctx, struct sdap_options);
    if (!opts) return ENOMEM;

    ret = sdap_domain_add(opts, dom, NULL);
    if (ret != EOK) {
        goto done;
    }

    ret = dp_get_options(opts, cdb, conf_path,
                         default_basic_opts,
                         SDAP_OPTS_BASIC,
                         &opts->basic);
    if (ret != EOK) {
        goto done;
    }

    /* Handle search bases */
    search_base = dp_opt_get_string(opts->basic, SDAP_SEARCH_BASE);
    if (search_base != NULL) {
        /* set user/group/netgroup search bases if they are not */
        for (o = 0; search_base_options[o] != -1; o++) {
            if (NULL == dp_opt_get_string(opts->basic, search_base_options[o])) {
                ret = dp_opt_set_string(opts->basic, search_base_options[o],
                                        search_base);
                if (ret != EOK) {
                    goto done;
                }
                DEBUG(6, ("Option %s set to %s\n",
                          opts->basic[search_base_options[o]].opt_name,
                          dp_opt_get_string(opts->basic,
                                            search_base_options[o])));
            }
        }
    } else {
        DEBUG(5, ("Search base not set, trying to discover it later when "
                  "connecting to the LDAP server.\n"));
    }

    /* Default search */
    ret = sdap_parse_search_base(opts, opts->basic,
                                 SDAP_SEARCH_BASE,
                                 &opts->sdom->search_bases);
    if (ret != EOK && ret != ENOENT) goto done;

    /* User search */
    ret = sdap_parse_search_base(opts, opts->basic,
                                 SDAP_USER_SEARCH_BASE,
                                 &opts->sdom->user_search_bases);
    if (ret != EOK && ret != ENOENT) goto done;

    /* Group search base */
    ret = sdap_parse_search_base(opts, opts->basic,
                                 SDAP_GROUP_SEARCH_BASE,
                                 &opts->sdom->group_search_bases);
    if (ret != EOK && ret != ENOENT) goto done;

    /* Netgroup search */
    ret = sdap_parse_search_base(opts, opts->basic,
                                 SDAP_NETGROUP_SEARCH_BASE,
                                 &opts->sdom->netgroup_search_bases);
    if (ret != EOK && ret != ENOENT) goto done;

    /* Service search */
    ret = sdap_parse_search_base(opts, opts->basic,
                                 SDAP_SERVICE_SEARCH_BASE,
                                 &opts->sdom->service_search_bases);
    if (ret != EOK && ret != ENOENT) goto done;

    pwd_policy = dp_opt_get_string(opts->basic, SDAP_PWD_POLICY);
    if (pwd_policy == NULL) {
        DEBUG(1, ("Missing password policy, this may not happen.\n"));
        ret = EINVAL;
        goto done;
    }
    if (strcasecmp(pwd_policy, PWD_POL_OPT_NONE) != 0 &&