149 lines
4.4 KiB
C
149 lines
4.4 KiB
C
/*
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* Copyright (c) 1997-2002 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "headers.h"
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RCSID("$Id: kstash.c,v 1.15 2002/04/18 09:47:25 joda Exp $");
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krb5_context context;
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const char *keyfile = HDB_DB_DIR "/m-key";
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int convert_flag;
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int help_flag;
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int version_flag;
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int master_key_fd = -1;
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const char *enctype_str = "des3-cbc-sha1";
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struct getargs args[] = {
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{ "enctype", 'e', arg_string, &enctype_str, "encryption type" },
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{ "key-file", 'k', arg_string, &keyfile, "master key file", "file" },
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{ "convert-file", 0, arg_flag, &convert_flag,
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"just convert keyfile to new format" },
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{ "master-key-fd", 0, arg_integer, &master_key_fd,
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"filedescriptor to read passphrase from", "fd" },
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{ "help", 'h', arg_flag, &help_flag },
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{ "version", 0, arg_flag, &version_flag }
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};
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int num_args = sizeof(args) / sizeof(args[0]);
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int
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main(int argc, char **argv)
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{
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char buf[1024];
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krb5_error_code ret;
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krb5_enctype enctype;
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hdb_master_key mkey;
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krb5_program_setup(&context, argc, argv, args, num_args, NULL);
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if(help_flag)
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krb5_std_usage(0, args, num_args);
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if(version_flag){
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print_version(NULL);
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exit(0);
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}
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ret = krb5_string_to_enctype(context, enctype_str, &enctype);
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if(ret)
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krb5_err(context, 1, ret, "krb5_string_to_enctype");
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ret = hdb_read_master_key(context, keyfile, &mkey);
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if(ret && ret != ENOENT)
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krb5_err(context, 1, ret, "reading master key from %s", keyfile);
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if (convert_flag) {
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if (ret)
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krb5_err(context, 1, ret, "reading master key from %s", keyfile);
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} else {
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krb5_keyblock key;
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krb5_salt salt;
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salt.salttype = KRB5_PW_SALT;
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/* XXX better value? */
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salt.saltvalue.data = NULL;
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salt.saltvalue.length = 0;
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if(master_key_fd != -1) {
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ssize_t n;
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n = read(master_key_fd, buf, sizeof(buf));
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if(n <= 0)
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krb5_err(context, 1, errno, "failed to read passphrase");
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buf[n] = '\0';
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buf[strcspn(buf, "\r\n")] = '\0';
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} else {
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if(des_read_pw_string(buf, sizeof(buf), "Master key: ", 1))
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exit(1);
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}
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krb5_string_to_key_salt(context, enctype, buf, salt, &key);
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ret = hdb_add_master_key(context, &key, &mkey);
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krb5_free_keyblock_contents(context, &key);
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}
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{
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char *new, *old;
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asprintf(&old, "%s.old", keyfile);
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asprintf(&new, "%s.new", keyfile);
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if(unlink(new) < 0 && errno != ENOENT) {
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ret = errno;
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goto out;
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}
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krb5_warnx(context, "writing key to `%s'", keyfile);
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ret = hdb_write_master_key(context, new, mkey);
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if(ret)
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unlink(new);
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else {
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unlink(old);
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if(link(keyfile, old) < 0 && errno != ENOENT) {
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ret = errno;
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unlink(new);
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} else if(rename(new, keyfile) < 0) {
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ret = errno;
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}
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}
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out:
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free(old);
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free(new);
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if(ret)
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krb5_warn(context, errno, "writing master key file");
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}
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hdb_free_master_key(context, mkey);
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exit(ret != 0);
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}
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