1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /*
3 * Copyright (C) 1998 by the FundsXpress, INC.
4 *
5 * All rights reserved.
6 *
7 * Export of this software from the United States of America may require
8 * a specific license from the United States Government. It is the
9 * responsibility of any person or organization contemplating export to
10 * 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 FundsXpress. not be used in advertising or publicity pertaining
18 * to distribution of the software without specific, written prior
19 * permission. FundsXpress makes no representations about the suitability of
20 * this software for any purpose. It is provided "as is" without express
21 * or implied warranty.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
25 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
26 */
27
28 #include "crypto_int.h"
29
30 static krb5_boolean
is_keyed_for(const struct krb5_cksumtypes * ctp,const struct krb5_keytypes * ktp)31 is_keyed_for(const struct krb5_cksumtypes *ctp,
32 const struct krb5_keytypes *ktp)
33 {
34 if (ctp->flags & CKSUM_UNKEYED)
35 return FALSE;
36 return (!ctp->enc || ktp->enc == ctp->enc);
37 }
38
39 krb5_error_code KRB5_CALLCONV
krb5_c_keyed_checksum_types(krb5_context context,krb5_enctype enctype,unsigned int * count,krb5_cksumtype ** cksumtypes)40 krb5_c_keyed_checksum_types(krb5_context context, krb5_enctype enctype,
41 unsigned int *count, krb5_cksumtype **cksumtypes)
42 {
43 unsigned int i, c, nctypes;
44 krb5_cksumtype *ctypes;
45 const struct krb5_cksumtypes *ctp;
46 const struct krb5_keytypes *ktp;
47
48 *count = 0;
49 *cksumtypes = NULL;
50
51 ktp = find_enctype(enctype);
52 if (ktp == NULL)
53 return KRB5_BAD_ENCTYPE;
54
55 nctypes = 0;
56 for (i = 0; i < krb5int_cksumtypes_length; i++) {
57 ctp = &krb5int_cksumtypes_list[i];
58 if (is_keyed_for(ctp, ktp))
59 nctypes++;
60 }
61
62 ctypes = malloc(nctypes * sizeof(krb5_cksumtype));
63 if (ctypes == NULL)
64 return ENOMEM;
65
66 c = 0;
67 for (i = 0; i < krb5int_cksumtypes_length; i++) {
68 ctp = &krb5int_cksumtypes_list[i];
69 if (is_keyed_for(ctp, ktp))
70 ctypes[c++] = ctp->ctype;
71 }
72
73 *count = nctypes;
74 *cksumtypes = ctypes;
75 return 0;
76 }
77
78 void KRB5_CALLCONV
krb5_free_cksumtypes(krb5_context context,krb5_cksumtype * val)79 krb5_free_cksumtypes(krb5_context context, krb5_cksumtype *val)
80 {
81 free(val);
82 }
83