data.c revision 78527 
1/*
2 * Copyright (c) 1997 - 2001 Kungliga Tekniska H�gskolan
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
36RCSID("$Id: data.c,v 1.16 2001/05/14 06:14:46 assar Exp $");
37
38void
39krb5_data_zero(krb5_data *p)
40{
41    p->length = 0;
42    p->data   = NULL;
43}
44
45void
46krb5_data_free(krb5_data *p)
47{
48    if(p->data != NULL)
49	free(p->data);
50    p->length = 0;
51}
52
53void
54krb5_free_data(krb5_context context,
55	       krb5_data *p)
56{
57    krb5_data_free(p);
58    free(p);
59}
60
61krb5_error_code
62krb5_data_alloc(krb5_data *p, int len)
63{
64    p->data = malloc(len);
65    if(len && p->data == NULL)
66	return ENOMEM;
67    p->length = len;
68    return 0;
69}
70
71krb5_error_code
72krb5_data_realloc(krb5_data *p, int len)
73{
74    void *tmp;
75    tmp = realloc(p->data, len);
76    if(len && !tmp)
77	return ENOMEM;
78    p->data = tmp;
79    p->length = len;
80    return 0;
81}
82
83krb5_error_code
84krb5_data_copy(krb5_data *p, const void *data, size_t len)
85{
86    if (len) {
87	if(krb5_data_alloc(p, len))
88	    return ENOMEM;
89	memmove(p->data, data, len);
90    } else
91	p->data = NULL;
92    p->length = len;
93    return 0;
94}
95
96krb5_error_code
97krb5_copy_data(krb5_context context,
98	       const krb5_data *indata,
99	       krb5_data **outdata)
100{
101    krb5_error_code ret;
102    ALLOC(*outdata, 1);
103    if(*outdata == NULL) {
104	krb5_set_error_string(context, "malloc: out of memory");
105	return ENOMEM;
106    }
107    ret = copy_octet_string(indata, *outdata);
108    if(ret) {
109	krb5_clear_error_string (context);
110	free(*outdata);
111    }
112    return ret;
113}
114