crypto/heimdal-0.6.3/lib/krb5/data.c

   1 /*
   2  * Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "krb5_locl.h"
  35
  36 RCSID("$Id: data.c,v 1.17 2003/03/25 22:07:17 lha Exp $");
  37
  38 void
  39 krb5_data_zero(krb5_data *p)
  40 {
  41     p->length = 0;
  42     p->data   = NULL;
  43 }
  44
  45 void
  46 krb5_data_free(krb5_data *p)
  47 {
  48     if(p->data != NULL)
  49         free(p->data);
  50     p->length = 0;
  51 }
  52
  53 void
  54 krb5_free_data_contents(krb5_context context, krb5_data *data)
  55 {
  56     krb5_data_free(data);
  57 }
  58
  59 void
  60 krb5_free_data(krb5_context context,
  61                krb5_data *p)
  62 {
  63     krb5_data_free(p);
  64     free(p);
  65 }
  66
  67 krb5_error_code
  68 krb5_data_alloc(krb5_data *p, int len)
  69 {
  70     p->data = malloc(len);
  71     if(len && p->data == NULL)
  72         return ENOMEM;
  73     p->length = len;
  74     return 0;
  75 }
  76
  77 krb5_error_code
  78 krb5_data_realloc(krb5_data *p, int len)
  79 {
  80     void *tmp;
  81     tmp = realloc(p->data, len);
  82     if(len && !tmp)
  83         return ENOMEM;
  84     p->data = tmp;
  85     p->length = len;
  86     return 0;
  87 }
  88
  89 krb5_error_code
  90 krb5_data_copy(krb5_data *p, const void *data, size_t len)
  91 {
  92     if (len) {
  93         if(krb5_data_alloc(p, len))
  94             return ENOMEM;
  95         memmove(p->data, data, len);
  96     } else
  97         p->data = NULL;
  98     p->length = len;
  99     return 0;
 100 }
 101
 102 krb5_error_code
 103 krb5_copy_data(krb5_context context,
 104                const krb5_data *indata,
 105                krb5_data **outdata)
 106 {
 107     krb5_error_code ret;
 108     ALLOC(*outdata, 1);
 109     if(*outdata == NULL) {
 110         krb5_set_error_string(context, "malloc: out of memory");
 111         return ENOMEM;
 112     }
 113     ret = copy_octet_string(indata, *outdata);
 114     if(ret) {
 115         krb5_clear_error_string (context);
 116         free(*outdata);
 117     }
 118     return ret;
 119 }