1/*
2 * Copyright (c) 2004 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 "kuser_locl.h"
35#include <config.h>
36#include <parse_units.h>
37#include <parse_time.h>
38#include "kcc-commands.h"
39
40static int32_t
41bitswap32(int32_t b)
42{
43    int32_t r = 0;
44    int i;
45    for (i = 0; i < 32; i++) {
46	r = r << 1 | (b & 1);
47	b = b >> 1;
48    }
49    return r;
50}
51
52static void
53parse_ticket_flags(krb5_context context,
54		   const char *string, krb5_ticket_flags *ret_flags)
55{
56    TicketFlags ff;
57    int flags = parse_flags(string, asn1_TicketFlags_units(), 0);
58    if (flags == -1)	/* XXX */
59	krb5_errx(context, 1, "bad flags specified: \"%s\"", string);
60
61    memset(&ff, 0, sizeof(ff));
62    ff.proxy = 1;
63    if ((size_t)parse_flags("proxy", asn1_TicketFlags_units(), 0) == TicketFlags2int(ff))
64	ret_flags->i = flags;
65    else
66	ret_flags->i = bitswap32(flags);
67}
68
69struct ctx {
70    krb5_flags whichfields;
71    krb5_creds mcreds;
72};
73
74static krb5_boolean
75matchfunc(krb5_context context, void *ptr, const krb5_creds *creds)
76{
77    struct ctx *ctx = ptr;
78    if (krb5_compare_creds(context, ctx->whichfields, &ctx->mcreds, creds))
79	return TRUE;
80    return FALSE;
81}
82
83int
84copy_cred_cache(struct copy_cred_cache_options *opt, int argc, char **argv)
85{
86    krb5_error_code ret;
87    const char *from_name, *to_name;
88    krb5_ccache from_ccache, to_ccache;
89    unsigned int matched;
90    struct ctx ctx;
91
92    memset(&ctx, 0, sizeof(ctx));
93
94    if (opt->service_string) {
95	ret = krb5_parse_name(kcc_context, opt->service_string, &ctx.mcreds.server);
96	if (ret)
97	    krb5_err(kcc_context, 1, ret, "%s", opt->service_string);
98    }
99    if (opt->enctype_string) {
100	krb5_enctype enctype;
101	ret = krb5_string_to_enctype(kcc_context, opt->enctype_string, &enctype);
102	if (ret)
103	    krb5_err(kcc_context, 1, ret, "%s", opt->enctype_string);
104	ctx.whichfields |= KRB5_TC_MATCH_KEYTYPE;
105	ctx.mcreds.session.keytype = enctype;
106    }
107    if (opt->flags_string) {
108	parse_ticket_flags(kcc_context, opt->flags_string, &ctx.mcreds.flags);
109	ctx.whichfields |= KRB5_TC_MATCH_FLAGS;
110    }
111    if (opt->valid_for_string) {
112	time_t t = parse_time(opt->valid_for_string, "s");
113	if(t < 0)
114	    errx(1, "unknown time \"%s\"", opt->valid_for_string);
115	ctx.mcreds.times.endtime = time(NULL) + t;
116	ctx.whichfields |= KRB5_TC_MATCH_TIMES;
117    }
118    if (opt->fcache_version_integer)
119	krb5_set_fcache_version(kcc_context, opt->fcache_version_integer);
120
121    if (argc == 1) {
122	from_name = krb5_cc_default_name(kcc_context);
123	to_name = argv[0];
124    } else {
125	from_name = argv[0];
126	to_name = argv[1];
127    }
128
129    ret = krb5_cc_resolve(kcc_context, from_name, &from_ccache);
130    if (ret)
131	krb5_err(kcc_context, 1, ret, "%s", from_name);
132
133    if (opt->krbtgt_only_flag) {
134	krb5_principal client;
135	ret = krb5_cc_get_principal(kcc_context, from_ccache, &client);
136	if (ret)
137	    krb5_err(kcc_context, 1, ret, "getting default principal");
138	ret = krb5_make_principal(kcc_context, &ctx.mcreds.server,
139				  krb5_principal_get_realm(kcc_context, client),
140				  KRB5_TGS_NAME,
141				  krb5_principal_get_realm(kcc_context, client),
142				  NULL);
143	if (ret)
144	    krb5_err(kcc_context, 1, ret, "constructing krbtgt principal");
145	krb5_free_principal(kcc_context, client);
146    }
147    ret = krb5_cc_resolve(kcc_context, to_name, &to_ccache);
148    if (ret)
149	krb5_err(kcc_context, 1, ret, "%s", to_name);
150
151    ret = krb5_cc_copy_match_f(kcc_context, from_ccache, to_ccache,
152			       matchfunc, &ctx, &matched);
153    if (ret)
154	krb5_err(kcc_context, 1, ret, "copying cred cache");
155
156    krb5_cc_close(kcc_context, from_ccache);
157    if(matched == 0)
158	krb5_cc_destroy(kcc_context, to_ccache);
159    else
160	krb5_cc_close(kcc_context, to_ccache);
161
162    return matched == 0;
163}
164