1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* lib/krb5/krb/copy_data.c */
3 /*
4 * Copyright 1990,1991,2009 by the Massachusetts Institute of Technology.
5 * All Rights Reserved.
6 *
7 * Export of this software from the United States of America may
8 * require a specific license from the United States Government.
9 * It is the responsibility of any person or organization contemplating
10 * export to obtain such a license before exporting.
11 *
12 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
13 * distribute this software and its documentation for any purpose and
14 * without fee is hereby granted, provided that the above copyright
15 * notice appear in all copies and that both that copyright notice and
16 * this permission notice appear in supporting documentation, and that
17 * the name of M.I.T. not be used in advertising or publicity pertaining
18 * to distribution of the software without specific, written prior
19 * permission. Furthermore if you modify this software you must label
20 * your software as modified software and not distribute it in such a
21 * fashion that it might be confused with the original M.I.T. software.
22 * M.I.T. makes no representations about the suitability of
23 * this software for any purpose. It is provided "as is" without express
24 * or implied warranty.
25 */
26
27 /*
28 *
29 * krb5_copy_data()
30 */
31
32 #include "k5-int.h"
33
34 /*
35 * Copy a data structure, with fresh allocation.
36 */
37 krb5_error_code KRB5_CALLCONV
krb5_copy_data(krb5_context context,const krb5_data * indata,krb5_data ** outdata)38 krb5_copy_data(krb5_context context, const krb5_data *indata, krb5_data **outdata)
39 {
40 krb5_data *tempdata;
41 krb5_error_code retval;
42
43 if (!indata) {
44 *outdata = 0;
45 return 0;
46 }
47
48 if (!(tempdata = (krb5_data *)malloc(sizeof(*tempdata))))
49 return ENOMEM;
50
51 retval = krb5int_copy_data_contents(context, indata, tempdata);
52 if (retval) {
53 free(tempdata);
54 return retval;
55 }
56
57 *outdata = tempdata;
58 return 0;
59 }
60
61 krb5_error_code
krb5int_copy_data_contents(krb5_context context,const krb5_data * indata,krb5_data * outdata)62 krb5int_copy_data_contents(krb5_context context, const krb5_data *indata, krb5_data *outdata)
63 {
64 if (!indata) {
65 return EINVAL;
66 }
67
68 outdata->length = indata->length;
69 if (outdata->length) {
70 if (!(outdata->data = malloc(outdata->length))) {
71 return ENOMEM;
72 }
73 memcpy(outdata->data, indata->data, outdata->length);
74 } else
75 outdata->data = 0;
76 outdata->magic = KV5M_DATA;
77
78 return 0;
79 }
80
81 /* As above, but add an (uncounted) extra byte at the end to
82 null-terminate the data so it can be used as a standard C
83 string. */
84 krb5_error_code
krb5int_copy_data_contents_add0(krb5_context context,const krb5_data * indata,krb5_data * outdata)85 krb5int_copy_data_contents_add0(krb5_context context, const krb5_data *indata, krb5_data *outdata)
86 {
87 if (!indata)
88 return EINVAL;
89 outdata->length = indata->length;
90 if (!(outdata->data = malloc(outdata->length + 1)))
91 return ENOMEM;
92 if (outdata->length)
93 memcpy(outdata->data, indata->data, outdata->length);
94 outdata->data[outdata->length] = 0;
95 outdata->magic = KV5M_DATA;
96
97 return 0;
98 }
99