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
40 static int32_t
bitswap32(int32_t b)41 bitswap32(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
52 static void
parse_ticket_flags(krb5_context context,const char * string,krb5_ticket_flags * ret_flags)53 parse_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
69 struct ctx {
70 krb5_flags whichfields;
71 krb5_creds mcreds;
72 };
73
74 static krb5_boolean
matchfunc(krb5_context context,void * ptr,const krb5_creds * creds)75 matchfunc(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
83 int
copy_cred_cache(struct copy_cred_cache_options * opt,int argc,char ** argv)84 copy_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