source4/heimdal/lib/gssapi/mech/gss_buffer_set.c

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