2 * Copyright (c) 1997-2004 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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
39 static int convert_flag;
41 static int version_flag;
43 static int master_key_fd = -1;
44 static int random_key_flag;
46 static const char *enctype_str = "des3-cbc-sha1";
48 static struct getargs args[] = {
49 { "enctype", 'e', arg_string, rk_UNCONST(&enctype_str), "encryption type",
51 { "key-file", 'k', arg_string, &keyfile, "master key file", "file" },
52 { "convert-file", 0, arg_flag, &convert_flag,
53 "just convert keyfile to new format", NULL },
54 { "master-key-fd", 0, arg_integer, &master_key_fd,
55 "filedescriptor to read passphrase from", "fd" },
56 { "random-key", 0, arg_flag, &random_key_flag,
57 "generate a random master key", NULL },
58 { "help", 'h', arg_flag, &help_flag, NULL, NULL },
59 { "version", 0, arg_flag, &version_flag, NULL, NULL }
62 int num_args = sizeof(args) / sizeof(args[0]);
65 main(int argc, char **argv)
74 krb5_program_setup(&context, argc, argv, args, num_args, NULL);
77 krb5_std_usage(0, args, num_args);
83 if (master_key_fd != -1 && random_key_flag)
84 krb5_errx(context, 1, "random-key and master-key-fd "
85 "is mutual exclusive");
88 asprintf(&keyfile, "%s/m-key", hdb_db_dir(context));
90 ret = krb5_string_to_enctype(context, enctype_str, &enctype);
92 krb5_err(context, 1, ret, "krb5_string_to_enctype");
94 ret = hdb_read_master_key(context, keyfile, &mkey);
95 if(ret && ret != ENOENT)
96 krb5_err(context, 1, ret, "reading master key from %s", keyfile);
100 krb5_err(context, 1, ret, "reading master key from %s", keyfile);
104 salt.salttype = KRB5_PW_SALT;
105 /* XXX better value? */
106 salt.saltvalue.data = NULL;
107 salt.saltvalue.length = 0;
108 if (random_key_flag) {
109 ret = krb5_generate_random_keyblock(context, enctype, &key);
111 krb5_err(context, 1, ret, "krb5_generate_random_keyblock");
114 if(master_key_fd != -1) {
116 n = read(master_key_fd, buf, sizeof(buf));
118 krb5_err(context, 1, errno, "failed to read passphrase");
120 buf[strcspn(buf, "\r\n")] = '\0';
123 if(UI_UTIL_read_pw_string(buf, sizeof(buf), "Master key: ", 1))
126 krb5_string_to_key_salt(context, enctype, buf, salt, &key);
128 ret = hdb_add_master_key(context, &key, &mkey);
130 krb5_free_keyblock_contents(context, &key);
136 asprintf(&old, "%s.old", keyfile);
137 asprintf(&new, "%s.new", keyfile);
138 if(unlink(new) < 0 && errno != ENOENT) {
142 krb5_warnx(context, "writing key to `%s'", keyfile);
143 ret = hdb_write_master_key(context, new, mkey);
147 #ifndef NO_POSIX_LINKS
149 if(link(keyfile, old) < 0 && errno != ENOENT) {
154 if(rename(new, keyfile) < 0) {
157 #ifndef NO_POSIX_LINKS
165 krb5_warn(context, errno, "writing master key file");
168 hdb_free_master_key(context, mkey);