1 /*
2 * Copyright (c) 2004 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include "kadmin_locl.h"
37 #include "kadmin-commands.h"
38
39 extern int local_flag;
40
41 int
stash(struct stash_options * opt,int argc,char ** argv)42 stash(struct stash_options *opt, int argc, char **argv)
43 {
44 char buf[1024];
45 krb5_error_code ret;
46 krb5_enctype enctype;
47 hdb_master_key mkey;
48
49 if(!local_flag) {
50 krb5_warnx(context, "stash is only available in local (-l) mode");
51 return 0;
52 }
53
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;
58 }
59
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");
64 }
65
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;
71 }
72
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 n = 0;
93 }
94 buf[n] = '\0';
95 buf[strcspn(buf, "\r\n")] = '\0';
96 } else if (opt->random_password_flag) {
97 random_password (buf, sizeof(buf));
98 printf("Using random master stash password: %s\n", buf);
99 } else {
100 if(UI_UTIL_read_pw_string(buf, sizeof(buf), "Master key: ", 1)) {
101 hdb_free_master_key(context, mkey);
102 return 0;
103 }
104 }
105 ret = krb5_string_to_key_salt(context, enctype, buf, salt, &key);
106 if (ret == 0)
107 ret = hdb_add_master_key(context, &key, &mkey);
108 if (ret)
109 krb5_warn(context, errno, "setting master key");
110 krb5_free_keyblock_contents(context, &key);
111 }
112
113 {
114 char *new, *old;
115 asprintf(&old, "%s.old", opt->key_file_string);
116 asprintf(&new, "%s.new", opt->key_file_string);
117 if(old == NULL || new == NULL) {
118 ret = ENOMEM;
119 goto out;
120 }
121
122 if(unlink(new) < 0 && errno != ENOENT) {
123 ret = errno;
124 goto out;
125 }
126 krb5_warnx(context, "writing key to \"%s\"", opt->key_file_string);
127 ret = hdb_write_master_key(context, new, mkey);
128 if(ret)
129 unlink(new);
130 else {
131 unlink(old);
132 #ifndef NO_POSIX_LINKS
133 if(link(opt->key_file_string, old) < 0 && errno != ENOENT) {
134 ret = errno;
135 unlink(new);
136 } else {
137 #endif
138 if(rename(new, opt->key_file_string) < 0) {
139 ret = errno;
140 }
141 #ifndef NO_POSIX_LINKS
142 }
143 #endif
144 }
145 out:
146 free(old);
147 free(new);
148 if(ret)
149 krb5_warn(context, errno, "writing master key file");
150 }
151
152 hdb_free_master_key(context, mkey);
153 return 0;
154 }
155