lib/libgssapi/gss_buffer_set.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2004, PADL Software Pty Ltd.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * 3. Neither the name of PADL Software nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34 /* $FreeBSD$ */
  35
  36 #include <gssapi/gssapi.h>
  37 #include <errno.h>
  38 #include <stdlib.h>
  39 #include <string.h>
  40
  41 /* RCSID("$Id: gss_buffer_set.c 18885 2006-10-24 21:53:02Z lha $"); */
  42
  43 OM_uint32
  44 gss_create_empty_buffer_set(OM_uint32 * minor_status,
  45     gss_buffer_set_t *buffer_set)
  46 {
  47         gss_buffer_set_t set;
  48
  49         set = (gss_buffer_set_desc *) malloc(sizeof(*set));
  50         if (set == GSS_C_NO_BUFFER_SET) {
  51                 *minor_status = ENOMEM;
  52                 return (GSS_S_FAILURE);
  53         }
  54
  55         set->count = 0;
  56         set->elements = NULL;
  57
  58         *buffer_set = set;
  59
  60         *minor_status = 0;
  61         return (GSS_S_COMPLETE);
  62 }
  63
  64 OM_uint32
  65 gss_add_buffer_set_member(OM_uint32 * minor_status,
  66     const gss_buffer_t member_buffer, gss_buffer_set_t *buffer_set)
  67 {
  68         gss_buffer_set_t set;
  69         gss_buffer_t p;
  70         OM_uint32 ret;
  71
  72         if (*buffer_set == GSS_C_NO_BUFFER_SET) {
  73                 ret = gss_create_empty_buffer_set(minor_status,
  74                     buffer_set);
  75                 if (ret) {
  76                         return (ret);
  77                 }
  78         }
  79
  80         set = *buffer_set;
  81         set->elements = reallocarray(set->elements, set->count + 1,
  82             sizeof(set->elements[0]));
  83         if (set->elements == NULL) {
  84                 *minor_status = ENOMEM;
  85                 return (GSS_S_FAILURE);
  86         }
  87
  88         p = &set->elements[set->count];
  89
  90         p->value = malloc(member_buffer->length);
  91         if (p->value == NULL) {
  92                 *minor_status = ENOMEM;
  93                 return (GSS_S_FAILURE);
  94         }
  95         memcpy(p->value, member_buffer->value, member_buffer->length);
  96         p->length = member_buffer->length;
  97
  98         set->count++;
  99
 100         *minor_status = 0;
 101         return (GSS_S_COMPLETE);
 102 }
 103
 104 OM_uint32
 105 gss_release_buffer_set(OM_uint32 * minor_status, gss_buffer_set_t *buffer_set)
 106 {
 107         size_t i;
 108         OM_uint32 minor;
 109
 110         *minor_status = 0;
 111
 112         if (*buffer_set == GSS_C_NO_BUFFER_SET)
 113                 return (GSS_S_COMPLETE);
 114
 115         for (i = 0; i < (*buffer_set)->count; i++)
 116                 gss_release_buffer(&minor, &((*buffer_set)->elements[i]));
 117
 118         free((*buffer_set)->elements);
 119
 120         (*buffer_set)->elements = NULL;
 121         (*buffer_set)->count = 0;
 122
 123         free(*buffer_set);
 124         *buffer_set = GSS_C_NO_BUFFER_SET;
 125
 126         return (GSS_S_COMPLETE);
 127 }
 128