ad/common/getspent.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
 */

#include <shadow.h>
#include <stdlib.h>
#include "ad_common.h"

static int
update_buffer(ad_backend_ptr be, nss_XbyY_args_t *argp,
        const char *name, const char *domain)
{
    int buflen;
    char    *buffer;

    /*
     * The user password is not available in the AD object and therefore
     * sp_pwdp will be "*NP*".
     *
     * nss_ad will leave aging fields empty (i.e. The front end
     * marshaller will set sp_lstchgst, sp_min, sp_max, sp_warn,
     * sp_inact, and sp_expire to -1 and sp_flag to 0) because shadow
     * fields are irrevalent with AD and krb5.
     */

    buflen = snprintf(NULL, 0, "%s@%s:*NP*:::::::", name, domain) + 1;

    if (argp->buf.result != NULL) {
        buffer = be->buffer = malloc(buflen);
        if (be->buffer == NULL)
            return (-1);
        be->buflen = buflen;
    } else {
        if (buflen > argp->buf.buflen)
            return (-1);
        buflen = argp->buf.buflen;
        buffer = argp->buf.buffer;
    }

    buflen = snprintf(buffer, buflen, "%s@%s:*NP*:::::::",
        name, domain) + 1;
    return (0);
}

/*
 * getbynam gets a shadow entry by winname. This function constructs an ldap
 * search filter using the name invocation parameter and the getspnam search
 * filter defined. Once the filter is constructed we search for a matching
 * entry and marshal the data results into struct shadow for the frontend
 * process. The function _nss_ad_shadow2ent performs the data marshaling.
 */
static nss_status_t
getbynam(ad_backend_ptr be, void *a)
{
    nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
    char        name[SEARCHFILTERLEN + 1];
    char        *dname;
    nss_status_t    stat;
    idmap_stat  idmaprc;
    uid_t       uid;
    int     is_user, is_wuser;

    be->db_type = NSS_AD_DB_SHADOW_BYNAME;

    /* Sanitize name so that it can be used in our LDAP filter */
    if (_ldap_filter_name(name, argp->key.name, sizeof (name)) != 0)
        return ((nss_status_t)NSS_NOTFOUND);

    if ((dname = strchr(name, '@')) == NULL)
        return ((nss_status_t)NSS_NOTFOUND);

    *dname = '\0';
    dname++;

    /*
     * Use idmap service to verify that the given
     * name is a valid Windows name.
     */
    is_wuser = -1;
    is_user = 1;
    idmaprc = idmap_get_w2u_mapping(NULL, NULL, name, dname,
        0, &is_user, &is_wuser, &uid, NULL, NULL, NULL);
    if (idmaprc != IDMAP_SUCCESS) {
        RESET_ERRNO();
        return ((nss_status_t)NSS_NOTFOUND);
    }

    /* Create shadow(4) style string */
    if (update_buffer(be, argp, name, dname) < 0)
        return ((nss_status_t)NSS_NOTFOUND);

    /* Marshall the data, sanitize the return status and return */
    stat = _nss_ad_marshall_data(be, argp);
    return (_nss_ad_sanitize_status(be, argp, stat));
}

static ad_backend_op_t sp_ops[] = {
    _nss_ad_destr,
    _nss_ad_endent,
    _nss_ad_setent,
    _nss_ad_getent,
    getbynam
};


/*
 * _nss_ad_passwd_constr is where life begins. This function calls the
 * generic ldap constructor function to define and build the abstract
 * data types required to support ldap operations.
 */
/*ARGSUSED0*/
nss_backend_t *
_nss_ad_shadow_constr(const char *dummy1, const char *dummy2,
            const char *dummy3)
{

    return ((nss_backend_t *)_nss_ad_constr(sp_ops,
        sizeof (sp_ops)/sizeof (sp_ops[0]),
        _SHADOW, NULL, NULL));
}