lustre/utils/gss/lgss_null_utils.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (C) 2015, Trustees of Indiana University
  24  *
  25  * Author: Jeremy Filizetti <jfilizet@iu.edu>
  26  */
  27
  28 #include <string.h>
  29 #include <time.h>
  30 #include <libcfs/byteorder.h>
  31 #include "lgss_utils.h"
  32
  33 static int lgss_null_prepare_cred(struct lgss_cred *cred)
  34 {
  35         uint64_t tmp;
  36
  37         cred->lc_mech_token.value = malloc(sizeof(uint64_t));
  38         if (!cred->lc_mech_token.value)
  39                 return -1;
  40         cred->lc_mech_token.length = sizeof(uint64_t);
  41
  42         /* random token so it's not cached by the other side */
  43         tmp = random();
  44         tmp <<= 32;
  45
  46         /* Sec part flags needed on the other end */
  47         tmp |= cred->lc_root_flags;
  48
  49         /* big-endian for the wire */
  50         tmp = cpu_to_be64(tmp);
  51         memcpy(cred->lc_mech_token.value, &tmp, cred->lc_mech_token.length);
  52
  53         return 0;
  54 }
  55
  56 static void lgss_null_release_cred(struct lgss_cred *cred)
  57 {
  58         free(cred->lc_mech_token.value);
  59 }
  60
  61 static int lgss_null_validate_cred(struct lgss_cred *cred,
  62                                    gss_buffer_desc *token,
  63                                    gss_buffer_desc *ctx_token)
  64 {
  65         if (token->length <= 0)
  66                 return -1;
  67
  68         ctx_token->length = token->length;
  69         ctx_token->value = malloc(ctx_token->length);
  70         memcpy(ctx_token->value, token->value, ctx_token->length);
  71
  72         return 0;
  73 }
  74 struct lgss_mech_type lgss_mech_null = {
  75         .lmt_name               = "gssnull",
  76         .lmt_mech_n             = LGSS_MECH_NULL,
  77         .lmt_prepare_cred       = lgss_null_prepare_cred,
  78         .lmt_release_cred       = lgss_null_release_cred,
  79         .lmt_validate_cred      = lgss_null_validate_cred,
  80 };