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/*
* Copyright (c) 2004 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Portions Copyright (c) 2009 Apple Inc. 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 "kadmin_locl.h"
#include "kadmin-commands.h"
extern int local_flag;
int
stash(struct stash_options *opt, int argc, char **argv)
{
char buf[1024+1];
krb5_error_code ret;
krb5_enctype enctype;
hdb_master_key mkey;
int aret;
if(!local_flag) {
krb5_warnx(context, "stash is only available in local (-l) mode");
return 0;
}
ret = krb5_string_to_enctype(context, opt->enctype_string, &enctype);
if(ret) {
krb5_warn(context, ret, "%s", opt->enctype_string);
return 0;
}
if(opt->key_file_string == NULL) {
aret = asprintf(&opt->key_file_string, "%s/m-key", hdb_db_dir(context));
if (aret == -1)
errx(1, "out of memory");
}
ret = hdb_read_master_key(context, opt->key_file_string, &mkey);
if(ret && ret != ENOENT) {
krb5_warn(context, ret, "reading master key from %s",
opt->key_file_string);
return 0;
}
if (opt->convert_file_flag) {
if (ret)
krb5_warn(context, ret, "reading master key from %s",
opt->key_file_string);
hdb_free_master_key(context, mkey);
return 0;
} else {
krb5_keyblock key;
krb5_salt salt;
salt.salttype = KRB5_PW_SALT;
/* XXX better value? */
salt.saltvalue.data = NULL;
salt.saltvalue.length = 0;
if(opt->master_key_fd_integer != -1) {
ssize_t n;
n = read(opt->master_key_fd_integer, buf, sizeof(buf)-1);
if(n == 0)
krb5_warnx(context, "end of file reading passphrase");
else if(n < 0) {
krb5_warn(context, errno, "reading passphrase");
n = 0;
}
buf[n] = '\0';
buf[strcspn(buf, "\r\n")] = '\0';
} else if (opt->random_password_flag) {
random_password (buf, sizeof(buf));
printf("Using random master stash password: %s\n", buf);
} else {
if(UI_UTIL_read_pw_string(buf, sizeof(buf), "Master key: ",
UI_UTIL_FLAG_VERIFY)) {
hdb_free_master_key(context, mkey);
return 0;
}
}
ret = krb5_string_to_key_salt(context, enctype, buf, salt, &key);
if (ret == 0)
ret = hdb_add_master_key(context, &key, &mkey);
if (ret)
krb5_warn(context, errno, "setting master key");
krb5_free_keyblock_contents(context, &key);
}
{
char *new = NULL, *old = NULL;
aret = asprintf(&old, "%s.old", opt->key_file_string);
if (aret == -1) {
ret = ENOMEM;
goto out;
}
aret = asprintf(&new, "%s.new", opt->key_file_string);
if (aret == -1) {
ret = ENOMEM;
goto out;
}
if(unlink(new) < 0 && errno != ENOENT) {
ret = errno;
goto out;
}
krb5_warnx(context, "writing key to \"%s\"", opt->key_file_string);
ret = hdb_write_master_key(context, new, mkey);
if(ret)
unlink(new);
else {
unlink(old);
#ifndef NO_POSIX_LINKS
if(link(opt->key_file_string, old) < 0 && errno != ENOENT) {
ret = errno;
unlink(new);
} else {
#endif
if(rename(new, opt->key_file_string) < 0) {
ret = errno;
}
#ifndef NO_POSIX_LINKS
}
#endif
}
out:
free(old);
free(new);
if(ret)
krb5_warn(context, errno, "writing master key file");
}
hdb_free_master_key(context, mkey);
return 0;
}
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