freebsd-dev/crypto/heimdal/kdc/kstash.c
2000-01-09 20:58:00 +00:00

189 lines
5.1 KiB
C

/*
* Copyright (c) 1997-1999 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "headers.h"
RCSID("$Id: kstash.c,v 1.10 1999/11/13 04:14:17 assar Exp $");
krb5_context context;
char *keyfile = HDB_DB_DIR "/m-key";
char *v4_keyfile;
int convert_flag;
int help_flag;
int version_flag;
struct getargs args[] = {
{ "key-file", 'k', arg_string, &keyfile, "master key file", "file" },
{ "version4-key-file", '4', arg_string, &v4_keyfile,
"kerberos 4 master key file", "file" },
{ "convert-file", 0, arg_flag, &convert_flag,
"convert keytype of keyfile" },
{ "help", 'h', arg_flag, &help_flag },
{ "version", 0, arg_flag, &version_flag }
};
int num_args = sizeof(args) / sizeof(args[0]);
static void
write_keyfile(EncryptionKey key)
{
FILE *f;
char buf[1024];
size_t len;
#ifdef HAVE_UMASK
umask(077);
#endif
f = fopen(keyfile, "w");
if(f == NULL)
krb5_err(context, 1, errno, "%s", keyfile);
encode_EncryptionKey((unsigned char *)buf + sizeof(buf) - 1,
sizeof(buf), &key, &len);
fwrite(buf + sizeof(buf) - len, len, 1, f);
memset(buf, 0, sizeof(buf));
if(ferror(f)) {
int e = errno;
unlink(keyfile);
krb5_err(context, 1, e, "%s", keyfile);
}
fclose(f);
chmod(keyfile, 0400);
}
static int
convert_file(void)
{
FILE *f;
unsigned char buf[1024];
char *fn;
size_t len;
EncryptionKey key;
krb5_error_code ret;
f = fopen(keyfile, "r");
if(f == NULL) {
krb5_warn(context, errno, "%s", keyfile);
return 1;
}
len = fread(buf, 1, sizeof(buf), f);
if(ferror(f)) {
krb5_warn(context, errno, "fread");
ret = 1;
goto out1;
}
fclose(f);
ret = decode_EncryptionKey(buf, len, &key, &len);
memset(buf, 0, sizeof(buf));
if(ret) {
krb5_warn(context, ret, "decode_EncryptionKey");
goto out2;
}
if(key.keytype == KEYTYPE_DES)
key.keytype = ETYPE_DES_CBC_MD5;
else if(key.keytype == ETYPE_DES_CBC_MD5) {
krb5_warnx(context, "keyfile already converted");
ret = 0;
goto out2;
} else {
krb5_warnx(context, "bad encryption key type (%d)", key.keytype);
ret = 1;
goto out2;
}
asprintf(&fn, "%s.old", keyfile);
if(fn == NULL) {
krb5_warn(context, ENOMEM, "malloc");
ret = 1;
goto out1;
}
if(rename(keyfile, fn) < 0) {
krb5_warn(context, errno, "rename");
ret = 1;
goto out1;
}
write_keyfile(key);
krb5_free_keyblock_contents(context, &key);
return 0;
out1:
memset(buf, 0, sizeof(buf));
return ret ? 1 : 0;
out2:
krb5_free_keyblock_contents(context, &key);
return ret ? 1 : 0;
}
int
main(int argc, char **argv)
{
char buf[1024];
EncryptionKey key;
FILE *f;
krb5_program_setup(&context, argc, argv, args, num_args, NULL);
if(help_flag)
krb5_std_usage(0, args, num_args);
if(version_flag){
print_version(NULL);
exit(0);
}
if(convert_flag)
exit(convert_file());
key.keytype = ETYPE_DES_CBC_MD5; /* XXX */
if(v4_keyfile) {
f = fopen(v4_keyfile, "r");
if(f == NULL)
krb5_err(context, 1, errno, "fopen(%s)", v4_keyfile);
key.keyvalue.length = sizeof(des_cblock);
key.keyvalue.data = malloc(key.keyvalue.length);
fread(key.keyvalue.data, 1, key.keyvalue.length, f);
fclose(f);
} else {
krb5_salt salt;
salt.salttype = KRB5_PW_SALT;
/* XXX better value? */
salt.saltvalue.data = NULL;
salt.saltvalue.length = 0;
if(des_read_pw_string(buf, sizeof(buf), "Master key: ", 1))
exit(1);
krb5_string_to_key_salt(context, key.keytype, buf, salt, &key);
}
write_keyfile(key);
krb5_free_keyblock_contents(context, &key);
exit(0);
}