1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* lib/gssapi/krb5/set_ccache.c */
3 /*
4 * Copyright 1999, 2003 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 * Set ccache name used by gssapi, and optionally obtain old ccache
29 * name. Caller must not free returned name.
30 */
31
32 #include <string.h>
33 #include "gssapiP_krb5.h"
34
35 OM_uint32
gss_krb5int_ccache_name(OM_uint32 * minor_status,const gss_OID desired_mech,const gss_OID desired_object,const gss_buffer_t value)36 gss_krb5int_ccache_name(OM_uint32 *minor_status,
37 const gss_OID desired_mech,
38 const gss_OID desired_object,
39 const gss_buffer_t value)
40 {
41 OM_uint32 err = 0;
42 struct krb5_gss_ccache_name_req *req;
43 char *old_name, *cur_name = NULL;
44
45 err = gss_krb5int_initialize_library();
46 if (err) {
47 *minor_status = err;
48 return GSS_S_FAILURE;
49 }
50
51 assert(value->length == sizeof(*req));
52
53 if (value->length != sizeof(*req))
54 return GSS_S_FAILURE;
55
56 req = (struct krb5_gss_ccache_name_req *)value->value;
57
58 /* Our job is simple if the caller doesn't want the current name. */
59 if (req->out_name == NULL)
60 return kg_set_ccache_name(minor_status, req->name);
61
62 /* Fetch the current name and change it. */
63 kg_get_ccache_name(&err, &cur_name);
64 if (err)
65 goto cleanup;
66 kg_set_ccache_name(&err, req->name);
67 if (err)
68 goto cleanup;
69
70 /* Store the current name in a thread-specific variable. Free that
71 * variable's previous contents. */
72 old_name = k5_getspecific(K5_KEY_GSS_KRB5_SET_CCACHE_OLD_NAME);
73 err = k5_setspecific(K5_KEY_GSS_KRB5_SET_CCACHE_OLD_NAME, cur_name);
74 if (err)
75 goto cleanup;
76 free(old_name);
77
78 /* Give the caller an alias to the stored value. */
79 *req->out_name = cur_name;
80 cur_name = NULL;
81 err = 0;
82
83 cleanup:
84 free(cur_name);
85 *minor_status = err;
86 return (*minor_status == 0) ? GSS_S_COMPLETE : GSS_S_FAILURE;
87 }
88