copy.c revision 120945 
1/*
2 * Copyright (c) 1997 - 2001 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 "ktutil_locl.h"
35
36RCSID("$Id: copy.c,v 1.9 2003/01/16 18:59:03 lha Exp $");
37
38
39static krb5_boolean
40compare_keyblock(const krb5_keyblock *a, const krb5_keyblock *b)
41{
42    if(a->keytype != b->keytype ||
43       a->keyvalue.length != b->keyvalue.length ||
44       memcmp(a->keyvalue.data, b->keyvalue.data, a->keyvalue.length) != 0)
45	return FALSE;
46    return TRUE;
47}
48
49static int
50kt_copy_int (const char *from, const char *to)
51{
52    krb5_error_code ret;
53    krb5_keytab src_keytab, dst_keytab;
54    krb5_kt_cursor cursor;
55    krb5_keytab_entry entry, dummy;
56
57    ret = krb5_kt_resolve (context, from, &src_keytab);
58    if (ret) {
59	krb5_warn (context, ret, "resolving src keytab `%s'", from);
60	return 1;
61    }
62
63    ret = krb5_kt_resolve (context, to, &dst_keytab);
64    if (ret) {
65	krb5_kt_close (context, src_keytab);
66	krb5_warn (context, ret, "resolving dst keytab `%s'", to);
67	return 1;
68    }
69
70    ret = krb5_kt_start_seq_get (context, src_keytab, &cursor);
71    if (ret) {
72	krb5_warn (context, ret, "krb5_kt_start_seq_get %s", keytab_string);
73	goto out;
74    }
75
76    if (verbose_flag)
77	fprintf(stderr, "copying %s to %s\n", from, to);
78
79    while((ret = krb5_kt_next_entry(context, src_keytab,
80				    &entry, &cursor)) == 0) {
81	char *name_str;
82	char *etype_str;
83	krb5_unparse_name (context, entry.principal, &name_str);
84	krb5_enctype_to_string(context, entry.keyblock.keytype, &etype_str);
85	ret = krb5_kt_get_entry(context, dst_keytab,
86				entry.principal,
87				entry.vno,
88				entry.keyblock.keytype,
89				&dummy);
90	if(ret == 0) {
91	    /* this entry is already in the new keytab, so no need to
92               copy it; if the keyblocks are not the same, something
93               is weird, so complain about that */
94	    if(!compare_keyblock(&entry.keyblock, &dummy.keyblock)) {
95		krb5_warnx(context, "entry with different keyvalue "
96			   "already exists for %s, keytype %s, kvno %d",
97			   name_str, etype_str, entry.vno);
98	    }
99	    krb5_kt_free_entry(context, &dummy);
100	    krb5_kt_free_entry (context, &entry);
101	    free(name_str);
102	    free(etype_str);
103	    continue;
104	} else if(ret != KRB5_KT_NOTFOUND) {
105	    krb5_warn(context, ret, "krb5_kt_get_entry(%s)", name_str);
106	    krb5_kt_free_entry (context, &entry);
107	    free(name_str);
108	    free(etype_str);
109	    break;
110	}
111	if (verbose_flag)
112	    fprintf (stderr, "copying %s, keytype %s, kvno %d\n", name_str,
113		     etype_str, entry.vno);
114	ret = krb5_kt_add_entry (context, dst_keytab, &entry);
115	krb5_kt_free_entry (context, &entry);
116	if (ret) {
117	    krb5_warn (context, ret, "krb5_kt_add_entry(%s)", name_str);
118	    free(name_str);
119	    free(etype_str);
120	    break;
121	}
122	free(name_str);
123	free(etype_str);
124    }
125    krb5_kt_end_seq_get (context, src_keytab, &cursor);
126
127  out:
128    krb5_kt_close (context, src_keytab);
129    krb5_kt_close (context, dst_keytab);
130    return 0;
131}
132
133int
134kt_copy (int argc, char **argv)
135{
136    int help_flag = 0;
137    int optind = 0;
138
139    struct getargs args[] = {
140	{ "help", 'h', arg_flag, NULL}
141    };
142
143    int num_args = sizeof(args) / sizeof(args[0]);
144    int i = 0;
145
146    args[i++].value = &help_flag;
147
148    if(getarg(args, num_args, argc, argv, &optind)) {
149	arg_printusage(args, num_args, "ktutil copy",
150		       "keytab-src keytab-dest");
151	return 1;
152    }
153    if (help_flag) {
154	arg_printusage(args, num_args, "ktutil copy",
155		       "keytab-src keytab-dest");
156	return 1;
157    }
158
159    argv += optind;
160    argc -= optind;
161
162    if (argc != 2) {
163	arg_printusage(args, num_args, "ktutil copy",
164		       "keytab-src keytab-dest");
165	return 1;
166    }
167
168    return kt_copy_int(argv[0], argv[1]);
169}
170
171#ifndef KEYFILE
172#define KEYFILE SYSCONFDIR "/srvtab"
173#endif
174
175/* copy to from v4 srvtab, just short for copy */
176static int
177conv(int srvconv, int argc, char **argv)
178{
179    int help_flag = 0;
180    char *srvtab = KEYFILE;
181    int optind = 0;
182    char kt4[1024], kt5[1024];
183
184    char *name;
185
186    struct getargs args[] = {
187	{ "srvtab", 's', arg_string, NULL},
188	{ "help", 'h', arg_flag, NULL}
189    };
190
191    int num_args = sizeof(args) / sizeof(args[0]);
192    int i = 0;
193
194    args[i++].value = &srvtab;
195    args[i++].value = &help_flag;
196
197    if(srvconv)
198	name = "ktutil srvconvert";
199    else
200	name = "ktutil srvcreate";
201
202    if(getarg(args, num_args, argc, argv, &optind)){
203	arg_printusage(args, num_args, name, "");
204	return 1;
205    }
206    if(help_flag){
207	arg_printusage(args, num_args, name, "");
208	return 0;
209    }
210
211    argc -= optind;
212    argv += optind;
213
214    if (argc != 0) {
215	arg_printusage(args, num_args, name, "");
216	return 1;
217    }
218
219    snprintf(kt4, sizeof(kt4), "krb4:%s", srvtab);
220
221    if(srvconv) {
222	if(keytab_string != NULL)
223	    return kt_copy_int(kt4, keytab_string);
224	else {
225	    krb5_kt_default_modify_name(context, kt5, sizeof(kt5));
226	    return kt_copy_int(kt4, kt5);
227	}
228    } else {
229	if(keytab_string != NULL)
230	    return kt_copy_int(keytab_string, kt4);
231
232	krb5_kt_default_name(context, kt5, sizeof(kt5));
233	return kt_copy_int(kt5, kt4);
234    }
235}
236
237int
238srvconv(int argc, char **argv)
239{
240    return conv(1, argc, argv);
241}
242
243int
244srvcreate(int argc, char **argv)
245{
246    return conv(0, argc, argv);
247}
248