Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 *  linux/net/sunrpc/gss_krb5_seqnum.c

 *

 *  Adapted from MIT Kerberos 5-1.2.1 lib/gssapi/krb5/util_seqnum.c

 *

 *  Copyright (c) 2000 The Regents of the University of Michigan.

 *  All rights reserved.

 *

 *  Andy Adamson   <andros@umich.edu>

 */

/*

 * Copyright 1993 by OpenVision Technologies, Inc.

 *

 * Permission to use, copy, modify, distribute, and sell this software

 * and its documentation for any purpose is hereby granted without fee,

 * provided that the above copyright notice appears in all copies and

 * that both that copyright notice and this permission notice appear in

 * supporting documentation, and that the name of OpenVision not be used

 * in advertising or publicity pertaining to distribution of the software

 * without specific, written prior permission. OpenVision makes no

 * representations about the suitability of this software for any

 * purpose.  It is provided "as is" without express or implied warranty.

 *

 * OPENVISION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,

 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO

 * EVENT SHALL OPENVISION BE LIABLE FOR ANY SPECIAL, INDIRECT OR

 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF

 * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR

 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR

 * PERFORMANCE OF THIS SOFTWARE.

 */

#include <linux/types.h>

#include <linux/slab.h>

#include <linux/sunrpc/gss_krb5.h>

#include <linux/crypto.h>

#ifdef RPC_DEBUG

# define RPCDBG_FACILITY        RPCDBG_AUTH

#endif

s32

krb5_make_seq_num(struct crypto_blkcipher *key,

                int direction,

                s32 seqnum,

                unsigned char *cksum, unsigned char *buf)

{

        unsigned char plain[8];

        plain[0] = (unsigned char) (seqnum & 0xff);

        plain[1] = (unsigned char) ((seqnum >> 8) & 0xff);

        plain[2] = (unsigned char) ((seqnum >> 16) & 0xff);

        plain[3] = (unsigned char) ((seqnum >> 24) & 0xff);

        plain[4] = direction;

        plain[5] = direction;

        plain[6] = direction;

        plain[7] = direction;

        return krb5_encrypt(key, cksum, plain, buf, 8);

}

s32

krb5_get_seq_num(struct crypto_blkcipher *key,

               unsigned char *cksum,

               unsigned char *buf,

               int *direction, s32 * seqnum)

{

        s32 code;

        unsigned char plain[8];

        dprintk("RPC:       krb5_get_seq_num:\n");

        if ((code = krb5_decrypt(key, cksum, buf, plain, 8)))

                return code;

        if ((plain[4] != plain[5]) || (plain[4] != plain[6])

                                   || (plain[4] != plain[7]))

                return (s32)KG_BAD_SEQ;

        *direction = plain[4];

        *seqnum = ((plain[0]) |

                   (plain[1] << 8) | (plain[2] << 16) | (plain[3] << 24));

        return (0);

}