1/*
2 * Copyright (C) 1998 by the FundsXpress, INC.
3 *
4 * All rights reserved.
5 *
6 * Export of this software from the United States of America may require
7 * a specific license from the United States Government.  It is the
8 * responsibility of any person or organization contemplating export to
9 * obtain such a license before exporting.
10 *
11 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
12 * distribute this software and its documentation for any purpose and
13 * without fee is hereby granted, provided that the above copyright
14 * notice appear in all copies and that both that copyright notice and
15 * this permission notice appear in supporting documentation, and that
16 * the name of FundsXpress. not be used in advertising or publicity pertaining
17 * to distribution of the software without specific, written prior
18 * permission.  FundsXpress makes no representations about the suitability of
19 * this software for any purpose.  It is provided "as is" without express
20 * or implied warranty.
21 *
22 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
24 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
25 */
26
27#include "k5-int.h"
28#include "etypes.h"
29#include "cksumtypes.h"
30
31static int etype_match(krb5_enctype e1, krb5_enctype e2)
32{
33    int i1, i2;
34
35    for (i1=0; i1<krb5_enctypes_length; i1++)
36	if (krb5_enctypes_list[i1].etype == e1)
37	    break;
38
39    for (i2=0; i2<krb5_enctypes_length; i2++)
40	if (krb5_enctypes_list[i2].etype == e2)
41	    break;
42
43    return((i1 < krb5_enctypes_length) &&
44	   (i2 < krb5_enctypes_length) &&
45	   (krb5_enctypes_list[i1].enc == krb5_enctypes_list[i2].enc));
46}
47
48/*ARGSUSED*/
49krb5_error_code KRB5_CALLCONV
50krb5_c_keyed_checksum_types(krb5_context context, krb5_enctype enctype,
51			    unsigned int *count, krb5_cksumtype **cksumtypes)
52{
53    unsigned int i, c;
54
55    c = 0;
56    for (i=0; i<krb5_cksumtypes_length; i++) {
57	if ((krb5_cksumtypes_list[i].keyhash &&
58	     etype_match(krb5_cksumtypes_list[i].keyed_etype, enctype)) ||
59	    (krb5_cksumtypes_list[i].flags & KRB5_CKSUMFLAG_DERIVE)) {
60	    c++;
61	}
62    }
63
64    *count = c;
65
66    if ((*cksumtypes = (krb5_cksumtype *) malloc(c*sizeof(krb5_cksumtype)))
67	== NULL)
68	return(ENOMEM);
69
70    c = 0;
71    for (i=0; i<krb5_cksumtypes_length; i++) {
72	if ((krb5_cksumtypes_list[i].keyhash &&
73	     etype_match(krb5_cksumtypes_list[i].keyed_etype, enctype)) ||
74	    (krb5_cksumtypes_list[i].flags & KRB5_CKSUMFLAG_DERIVE)) {
75	    (*cksumtypes)[c] = krb5_cksumtypes_list[i].ctype;
76	    c++;
77	}
78    }
79
80    return(0);
81}
82
83/*ARGSUSED*/
84void KRB5_CALLCONV
85krb5_free_cksumtypes(krb5_context context, krb5_cksumtype *val)
86{
87    if (val)
88	krb5_xfree(val);
89    return;
90}
91
92