common/smbsrv/smb_token.c

	smb_token.c revision 9fb67ea305c66b6a297583b9b0db6796b0dfe497
/*
 * 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 2010 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * NT Token library (kernel/user)
 */

#ifdef _KERNEL
#include <sys/types.h>
#include <sys/cmn_err.h>
#include <sys/kmem.h>
#else /* _KERNEL */
#include <stdlib.h>
#include <strings.h>
#include <syslog.h>
#endif /* _KERNEL */

#include <smbsrv/string.h>
#include <smbsrv/smb_token.h>
#include <smbsrv/smb_xdr.h>

/*
 * smb_token_query_privilege
 *
 * Find out if the specified privilege is enable in the given
 * access token.
 */
int
smb_token_query_privilege(smb_token_t *token, int priv_id)
{
    smb_privset_t *privset;
    int i;

    if ((token == NULL) || (token->tkn_privileges == NULL))
        return (0);

    privset = token->tkn_privileges;
    for (i = 0; privset->priv_cnt; i++) {
        if (privset->priv[i].luid.lo_part == priv_id) {
            if (privset->priv[i].attrs == SE_PRIVILEGE_ENABLED)
                return (1);
            else
                return (0);
        }
    }

    return (0);
}

/*
 * Basic sanity check on a token.
 */
boolean_t
smb_token_valid(smb_token_t *token)
{
    if (token == NULL)
        return (B_FALSE);

    if ((token->tkn_user.i_sid == NULL) ||
        (token->tkn_owner.i_sid == NULL) ||
        (token->tkn_primary_grp.i_sid == NULL) ||
        (token->tkn_account_name == NULL) ||
        (token->tkn_domain_name == NULL) ||
        (token->tkn_posix_grps == NULL))
        return (B_FALSE);

    if ((token->tkn_win_grps.i_cnt != 0) &&
        (token->tkn_win_grps.i_ids == NULL))
        return (B_FALSE);

    return (B_TRUE);
}

#ifndef _KERNEL
/*
 * Encode: structure -> flat buffer (buffer size)
 * Pre-condition: obj is non-null.
 */
uint8_t *
smb_token_encode(smb_token_t *obj, uint32_t *len)
{
    uint8_t *buf;
    XDR xdrs;

    if (!obj) {
        syslog(LOG_ERR, "smb_token_encode: invalid parameter");
        return (NULL);
    }

    *len = xdr_sizeof(smb_token_xdr, obj);
    buf = (uint8_t *)malloc(*len);
    if (!buf) {
        syslog(LOG_ERR, "smb_token_encode: %m");
        return (NULL);
    }

    xdrmem_create(&xdrs, (const caddr_t)buf, *len, XDR_ENCODE);

    if (!smb_token_xdr(&xdrs, obj)) {
        syslog(LOG_ERR, "smb_token_encode: XDR encode error");
        *len = 0;
        free(buf);
        buf = NULL;
    }

    xdr_destroy(&xdrs);
    return (buf);
}

/*
 * Decode: flat buffer -> structure
 */
smb_logon_t *
smb_logon_decode(uint8_t *buf, uint32_t len)
{
    smb_logon_t *obj;
    XDR     xdrs;

    xdrmem_create(&xdrs, (const caddr_t)buf, len, XDR_DECODE);

    if ((obj = malloc(sizeof (smb_logon_t))) == NULL) {
        syslog(LOG_ERR, "smb_logon_decode: %m");
        xdr_destroy(&xdrs);
        return (NULL);
    }

    bzero(obj, sizeof (smb_logon_t));
    if (!smb_logon_xdr(&xdrs, obj)) {
        syslog(LOG_ERR, "smb_logon_decode: XDR decode error");
        free(obj);
        obj = NULL;
    }

    xdr_destroy(&xdrs);
    return (obj);
}

void
smb_logon_free(smb_logon_t *obj)
{
    xdr_free(smb_logon_xdr, (char *)obj);
    free(obj);
}
#else /* _KERNEL */
/*
 * Tokens are allocated in the kernel via XDR.
 * Call xdr_free before freeing the token structure.
 */
void
smb_token_free(smb_token_t *token)
{
    if (token != NULL) {
        xdr_free(smb_token_xdr, (char *)token);
        kmem_free(token, sizeof (smb_token_t));
    }
}
#endif /* _KERNEL */