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[heimdal.git] / kadmin / stash.c
blobd8bd78799fd41ca04615cc4a772aa2fe1feed853
1 /*
2 * Copyright (c) 2004 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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.
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.
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.
34 #include "kadmin_locl.h"
35 #include "kadmin-commands.h"
37 RCSID("$Id$");
39 extern int local_flag;
41 int
42 stash(struct stash_options *opt, int argc, char **argv)
44 char buf[1024];
45 krb5_error_code ret;
46 krb5_enctype enctype;
47 hdb_master_key mkey;
49 if(!local_flag) {
50 krb5_warnx(context, "stash is only available in local (-l) mode");
51 return 0;
54 ret = krb5_string_to_enctype(context, opt->enctype_string, &enctype);
55 if(ret) {
56 krb5_warn(context, ret, "%s", opt->enctype_string);
57 return 0;
60 if(opt->key_file_string == NULL) {
61 asprintf(&opt->key_file_string, "%s/m-key", hdb_db_dir(context));
62 if (opt->key_file_string == NULL)
63 errx(1, "out of memory");
66 ret = hdb_read_master_key(context, opt->key_file_string, &mkey);
67 if(ret && ret != ENOENT) {
68 krb5_warn(context, ret, "reading master key from %s",
69 opt->key_file_string);
70 return 0;
73 if (opt->convert_file_flag) {
74 if (ret)
75 krb5_warn(context, ret, "reading master key from %s",
76 opt->key_file_string);
77 return 0;
78 } else {
79 krb5_keyblock key;
80 krb5_salt salt;
81 salt.salttype = KRB5_PW_SALT;
82 /* XXX better value? */
83 salt.saltvalue.data = NULL;
84 salt.saltvalue.length = 0;
85 if(opt->master_key_fd_integer != -1) {
86 ssize_t n;
87 n = read(opt->master_key_fd_integer, buf, sizeof(buf));
88 if(n == 0)
89 krb5_warnx(context, "end of file reading passphrase");
90 else if(n < 0)
91 krb5_warn(context, errno, "reading passphrase");
92 buf[n] = '\0';
93 buf[strcspn(buf, "\r\n")] = '\0';
94 } else {
95 if(UI_UTIL_read_pw_string(buf, sizeof(buf), "Master key: ", 1)) {
96 hdb_free_master_key(context, mkey);
97 return 0;
100 ret = krb5_string_to_key_salt(context, enctype, buf, salt, &key);
101 ret = hdb_add_master_key(context, &key, &mkey);
102 krb5_free_keyblock_contents(context, &key);
106 char *new, *old;
107 asprintf(&old, "%s.old", opt->key_file_string);
108 asprintf(&new, "%s.new", opt->key_file_string);
109 if(old == NULL || new == NULL) {
110 ret = ENOMEM;
111 goto out;
114 if(unlink(new) < 0 && errno != ENOENT) {
115 ret = errno;
116 goto out;
118 krb5_warnx(context, "writing key to \"%s\"", opt->key_file_string);
119 ret = hdb_write_master_key(context, new, mkey);
120 if(ret)
121 unlink(new);
122 else {
123 unlink(old);
124 if(link(opt->key_file_string, old) < 0 && errno != ENOENT) {
125 ret = errno;
126 unlink(new);
127 } else if(rename(new, opt->key_file_string) < 0) {
128 ret = errno;
131 out:
132 free(old);
133 free(new);
134 if(ret)
135 krb5_warn(context, errno, "writing master key file");
138 hdb_free_master_key(context, mkey);
139 return 0;