lib/passwdutil/__failed_count.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) 2004, 2012, Oracle and/or its affiliates. All rights reserved.
 */

#include <string.h>
#include <syslog.h>
#include "passwdutil.h"

int
__incr_failed_count(char *username, char *repname, int max_failures)
{
    int ret;
    void *buf;
    attrlist items[1];
    int repnum = name_to_int(repname);
    repops_t *ops;

    /* account locking only defined for files and ldap */
    if ((repnum != REP_FILES) &&
        (repnum != REP_LDAP)) {
        return (PWU_SUCCESS);
    }

    ops = rops[repnum];
    if ((ops->lock != NULL) &&
        (ret = ops->lock()) != PWU_SUCCESS) {
        return (ret);
    }

    items[0].type = ATTR_INCR_FAILED_LOGINS;
    items[0].next = NULL;
    if ((ret = ops->getpwnam(username, items, NULL, &buf)) != PWU_SUCCESS) {
        goto out;
    }

    /* We increment the failed count by one */
    if ((ret = ops->update(items, NULL, buf)) != PWU_SUCCESS) {
        goto out;
    }

    /* Did we just exceed "max_failures" ? */
    if (max_failures != 0 &&
        items[0].data.val_i >= max_failures) {

        items[0].type = ATTR_LOCK_FAILED_LOGINS;

        /*
         * possible successful returns from update
         * ATTR_LOCK_FAILED_LOGINS are
         * PWU_SUCCESS -- locked
         * PWU_NO_CHANGE -- already locked
         * PWU_CHANGE_NOT_ALLOWED -- not allowed for this account
         */

        if ((ret = ops->update(items, NULL, buf)) != PWU_NO_CHANGE &&
            ret != PWU_CHANGE_NOT_ALLOWED) {
            syslog(LOG_AUTH|LOG_NOTICE,
                "Excessive (%d) login failures for %s: "
                "locking account.", max_failures, username);
        } else if (ret != PWU_NO_CHANGE &&
            ret != PWU_SUCCESS) {
            goto out;
        }
    }
    if (((ret = ops->putpwnam(username, NULL, NULL, buf)) ==
        PWU_SUCCESS) &&
        (items[0].type == ATTR_LOCK_FAILED_LOGINS))
        ret = PWU_ACCOUNT_LOCKED;

out:
    if (ops->unlock != NULL) {
        ops->unlock();
    }

    return (ret);
}

/*
 * reset the failed count.
 * returns the number of failed logins before the reset, or an error (< 0)
 */
int
__rst_failed_count(char *username, char *repname)
{
    int ret;
    void *buf;
    attrlist items[1];
    int repnum = name_to_int(repname);
    repops_t *ops;

    /* account locking only defined for files and ldap */
    if ((repnum != REP_FILES) &&
        (repnum != REP_LDAP)) {
        return (PWU_SUCCESS);
    }

    ops = rops[repnum];
    if ((ops->lock != NULL) &&
        (ret = ops->lock()) != PWU_SUCCESS) {
        return (ret);
    }

    items[0].type = ATTR_RST_FAILED_LOGINS;
    items[0].next = NULL;
    if ((ret = ops->getpwnam(username, items, NULL, &buf)) != PWU_SUCCESS)
        goto out;
    if ((ret = ops->update(items, NULL, buf)) != PWU_SUCCESS)
        goto out;
    ret = ops->putpwnam(username, NULL, NULL, buf);
out:
    if (ops->unlock != NULL) {
        ops->unlock();
    }

    return (ret != PWU_SUCCESS ? ret : items[0].data.val_i);
}