1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* lib/krb5/krb/pr_to_salt.c */
3 /*
4 * Copyright 1990 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 #include "k5-int.h"
28
29 static krb5_error_code
30 principal2salt_internal(krb5_context, krb5_const_principal,
31 krb5_data *ret, int);
32
33 /*
34 * Convert a krb5_principal into the default salt for that principal.
35 */
36 static krb5_error_code
principal2salt_internal(krb5_context context,krb5_const_principal pr,krb5_data * ret,int use_realm)37 principal2salt_internal(krb5_context context, krb5_const_principal pr,
38 krb5_data *ret, int use_realm)
39 {
40 unsigned int size = 0, offset=0;
41 krb5_int32 i;
42
43 *ret = empty_data();
44 if (pr == NULL)
45 return 0;
46
47 if (use_realm)
48 size += pr->realm.length;
49
50 for (i = 0; i < pr->length; i++)
51 size += pr->data[i].length;
52
53 if (alloc_data(ret, size))
54 return ENOMEM;
55
56 if (use_realm) {
57 offset = pr->realm.length;
58 if (offset > 0)
59 memcpy(ret->data, pr->realm.data, offset);
60 }
61
62 for (i = 0; i < pr->length; i++) {
63 if (pr->data[i].length > 0)
64 memcpy(&ret->data[offset], pr->data[i].data, pr->data[i].length);
65 offset += pr->data[i].length;
66 }
67 return 0;
68 }
69
70 krb5_error_code
krb5_principal2salt(krb5_context context,krb5_const_principal pr,krb5_data * ret)71 krb5_principal2salt(krb5_context context, krb5_const_principal pr,
72 krb5_data *ret)
73 {
74 return principal2salt_internal(context, pr, ret, 1);
75 }
76
77 krb5_error_code
krb5_principal2salt_norealm(krb5_context context,krb5_const_principal pr,krb5_data * ret)78 krb5_principal2salt_norealm(krb5_context context, krb5_const_principal pr,
79 krb5_data *ret)
80 {
81 return principal2salt_internal(context, pr, ret, 0);
82 }
83