linux-imx

/*

 *   fs/cifs/cifs_spnego.c -- SPNEGO upcall management for CIFS

 *

 *   Copyright (c) 2007 Red Hat, Inc.

 *   Author(s): Jeff Layton (jlayton@redhat.com)

 *

 *   This library is free software; you can redistribute it and/or modify

 *   it under the terms of the GNU Lesser General Public License as published

 *   by the Free Software Foundation; either version 2.1 of the License, or

 *   (at your option) any later version.

 *

 *   This library 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 Lesser General Public License for more details.

 *

 *   You should have received a copy of the GNU Lesser General Public License

 *   along with this library; if not, write to the Free Software

 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

 */

​

#include <linux/list.h>

#include <linux/slab.h>

#include <linux/string.h>

#include <keys/user-type.h>

#include <linux/key-type.h>

#include <linux/keyctl.h>

#include <linux/inet.h>

#include "cifsglob.h"

#include "cifs_spnego.h"

#include "cifs_debug.h"

#include "cifsproto.h"

static const struct cred *spnego_cred;

​

/* create a new cifs key */

static int

cifs_spnego_key_instantiate(struct key *key, struct key_preparsed_payload *prep)

{

    char *payload;

    int ret;

​

    ret = -ENOMEM;

    payload = kmemdup(prep->data, prep->datalen, GFP_KERNEL);

    if (!payload)

        goto error;

​

    /* attach the data */

    key->payload.data[0] = payload;

    ret = 0;

​

error:

    return ret;

}

​

static void

cifs_spnego_key_destroy(struct key *key)

{

    kfree(key->payload.data[0]);

}

​

​

/*

 * keytype for CIFS spnego keys

 */

struct key_type cifs_spnego_key_type = {

    .name       = "cifs.spnego",

    .instantiate    = cifs_spnego_key_instantiate,

    .destroy    = cifs_spnego_key_destroy,

    .describe   = user_describe,

};

​

/* length of longest version string e.g.  strlen("ver=0xFF") */

#define MAX_VER_STR_LEN     8

​

/* length of longest security mechanism name, eg in future could have

 * strlen(";sec=ntlmsspi") */

#define MAX_MECH_STR_LEN    13

​

/* strlen of "host=" */

#define HOST_KEY_LEN        5

​

/* strlen of ";ip4=" or ";ip6=" */

#define IP_KEY_LEN      5

​

/* strlen of ";uid=0x" */

#define UID_KEY_LEN     7

​

/* strlen of ";creduid=0x" */

#define CREDUID_KEY_LEN     11

​

/* strlen of ";user=" */

#define USER_KEY_LEN        6