1/*
2 * Copyright (c) 2008 - 2010 Kungliga Tekniska H��gskolan
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 "kuser_locl.h"
35#include "kcc-commands.h"
36
37#ifdef HAVE_READLINE
38char *readline(const char *prompt);
39#else
40
41static char *
42readline(const char *prompt)
43{
44    char buf[BUFSIZ];
45    printf ("%s", prompt);
46    fflush (stdout);
47    if(fgets(buf, sizeof(buf), stdin) == NULL)
48	return NULL;
49    buf[strcspn(buf, "\r\n")] = '\0';
50    return strdup(buf);
51}
52
53#endif
54
55/*
56 *
57 */
58
59int
60kswitch(struct kswitch_options *opt, int argc, char **argv)
61{
62    krb5_error_code ret;
63    krb5_ccache id = NULL;
64
65    if (opt->cache_string && opt->principal_string)
66	krb5_errx(kcc_context, 1,
67		  N_("Both --cache and --principal given, choose one", ""));
68
69    if (opt->interactive_flag) {
70	krb5_cc_cache_cursor cursor;
71	krb5_ccache *ids = NULL;
72	size_t i, len = 0;
73	char *name;
74	rtbl_t ct;
75
76	ct = rtbl_create();
77
78	rtbl_add_column_by_id(ct, 0, "#", 0);
79	rtbl_add_column_by_id(ct, 1, "Principal", 0);
80	rtbl_set_column_affix_by_id(ct, 1, "    ", "");
81        rtbl_add_column_by_id(ct, 2, "Type", 0);
82        rtbl_set_column_affix_by_id(ct, 2, "  ", "");
83
84	ret = krb5_cc_cache_get_first(kcc_context, NULL, &cursor);
85	if (ret)
86	    krb5_err(kcc_context, 1, ret, "krb5_cc_cache_get_first");
87
88	while (krb5_cc_cache_next(kcc_context, cursor, &id) == 0) {
89	    krb5_principal p;
90	    char num[10];
91
92	    ret = krb5_cc_get_principal(kcc_context, id, &p);
93	    if (ret)
94		continue;
95
96	    ret = krb5_unparse_name(kcc_context, p, &name);
97	    krb5_free_principal(kcc_context, p);
98
99	    snprintf(num, sizeof(num), "%d", (int)(len + 1));
100	    rtbl_add_column_entry_by_id(ct, 0, num);
101	    rtbl_add_column_entry_by_id(ct, 1, name);
102            rtbl_add_column_entry_by_id(ct, 2, krb5_cc_get_type(kcc_context, id));
103	    free(name);
104
105	    ids = erealloc(ids, (len + 1) * sizeof(ids[0]));
106	    ids[len] = id;
107	    len++;
108	}
109	krb5_cc_cache_end_seq_get(kcc_context, cursor);
110
111	rtbl_format(ct, stdout);
112	rtbl_destroy(ct);
113
114	name = readline("Select number: ");
115	if (name) {
116	    i = atoi(name);
117	    if (i == 0)
118		krb5_errx(kcc_context, 1, "Cache number '%s' is invalid", name);
119	    if (i > len)
120		krb5_errx(kcc_context, 1, "Cache number '%s' is too large", name);
121
122	    id = ids[i - 1];
123	    ids[i - 1] = NULL;
124	} else
125	    krb5_errx(kcc_context, 1, "No cache selected");
126	for (i = 0; i < len; i++)
127	    if (ids[i])
128		krb5_cc_close(kcc_context, ids[i]);
129
130    } else if (opt->principal_string) {
131	krb5_principal p;
132
133	ret = krb5_parse_name(kcc_context, opt->principal_string, &p);
134	if (ret)
135	    krb5_err(kcc_context, 1, ret, "krb5_parse_name: %s",
136		     opt->principal_string);
137
138	ret = krb5_cc_cache_match(kcc_context, p, &id);
139	if (ret)
140	    krb5_err(kcc_context, 1, ret,
141		     N_("Did not find principal: %s", ""),
142		     opt->principal_string);
143
144	krb5_free_principal(kcc_context, p);
145
146    } else if (opt->cache_string) {
147	const krb5_cc_ops *ops;
148	char *str;
149
150	ops = krb5_cc_get_prefix_ops(kcc_context, opt->type_string);
151	if (ops == NULL)
152	    krb5_err(kcc_context, 1, 0, "krb5_cc_get_prefix_ops");
153
154	asprintf(&str, "%s:%s", ops->prefix, opt->cache_string);
155	if (str == NULL)
156	    krb5_errx(kcc_context, 1, N_("out of memory", ""));
157
158	ret = krb5_cc_resolve(kcc_context, str, &id);
159	if (ret)
160	    krb5_err(kcc_context, 1, ret, "krb5_cc_resolve: %s", str);
161
162	free(str);
163    } else {
164	krb5_errx(kcc_context, 1, "missing option for kswitch");
165    }
166
167    ret = krb5_cc_switch(kcc_context, id);
168    if (ret)
169	krb5_err(kcc_context, 1, ret, "krb5_cc_switch");
170
171    return 0;
172}
173