1/*
2 * Copyright (c) 2003 - 2005 Kungliga Tekniska Högskolan
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 "gsskrb5_locl.h"
35
36static krb5_error_code
37check_compat(OM_uint32 *minor_status,
38	     krb5_context context, krb5_const_principal name,
39	     const char *option, krb5_boolean *compat,
40	     krb5_boolean match_val)
41{
42    krb5_error_code ret = 0;
43    char **p, **q;
44    krb5_principal match;
45
46
47    p = krb5_config_get_strings(context, NULL, "gssapi",
48				option, NULL);
49    if(p == NULL)
50	return 0;
51
52    match = NULL;
53    for(q = p; *q; q++) {
54	ret = krb5_parse_name(context, *q, &match);
55	if (ret)
56	    break;
57
58	if (krb5_principal_match(context, name, match)) {
59	    *compat = match_val;
60	    break;
61	}
62
63	krb5_free_principal(context, match);
64	match = NULL;
65    }
66    if (match)
67	krb5_free_principal(context, match);
68    krb5_config_free_strings(p);
69
70    if (ret) {
71	if (minor_status)
72	    *minor_status = ret;
73	return GSS_S_FAILURE;
74    }
75
76    return 0;
77}
78
79/*
80 * ctx->ctx_id_mutex is assumed to be locked
81 */
82
83OM_uint32
84_gss_DES3_get_mic_compat(OM_uint32 *minor_status,
85			 gsskrb5_ctx ctx,
86			 krb5_context context)
87{
88    krb5_boolean use_compat = FALSE;
89    OM_uint32 ret;
90
91    if ((ctx->more_flags & COMPAT_OLD_DES3_SELECTED) == 0) {
92	ret = check_compat(minor_status, context, ctx->target,
93			   "broken_des3_mic", &use_compat, TRUE);
94	if (ret)
95	    return ret;
96	ret = check_compat(minor_status, context, ctx->target,
97			   "correct_des3_mic", &use_compat, FALSE);
98	if (ret)
99	    return ret;
100
101	if (use_compat)
102	    ctx->more_flags |= COMPAT_OLD_DES3;
103	ctx->more_flags |= COMPAT_OLD_DES3_SELECTED;
104    }
105    return 0;
106}
107
108#if 0
109OM_uint32
110gss_krb5_compat_des3_mic(OM_uint32 *minor_status, gss_ctx_id_t ctx, int on)
111{
112    *minor_status = 0;
113
114    HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
115    if (on) {
116	ctx->more_flags |= COMPAT_OLD_DES3;
117    } else {
118	ctx->more_flags &= ~COMPAT_OLD_DES3;
119    }
120    ctx->more_flags |= COMPAT_OLD_DES3_SELECTED;
121    HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
122
123    return 0;
124}
125#endif
126