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/*
* Copyright (c) 1997 - 2006 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 "kadmin_locl.h"
#include "kadmin-commands.h"
struct ext_keytab_data {
krb5_keytab keytab;
int keep;
int random_key_flag;
size_t nkstuple;
krb5_key_salt_tuple *kstuple;
void *kadm_handle;
};
static int
do_ext_keytab(krb5_principal principal, void *data)
{
krb5_error_code ret;
kadm5_principal_ent_rec princ;
struct ext_keytab_data *e = data;
krb5_keytab_entry *keys = NULL;
krb5_keyblock *k = NULL;
size_t i;
int n_k = 0;
uint32_t mask;
char *unparsed = NULL;
mask = KADM5_PRINCIPAL;
if (!e->random_key_flag)
mask |= KADM5_KVNO | KADM5_KEY_DATA;
ret = kadm5_get_principal(e->kadm_handle, principal, &princ, mask);
if (ret)
return ret;
ret = krb5_unparse_name(context, principal, &unparsed);
if (ret)
goto out;
if (!e->random_key_flag) {
if (princ.n_key_data == 0) {
krb5_warnx(context, "principal has no keys, or user lacks "
"get-keys privilege for %s", unparsed);
goto out;
}
/*
* kadmin clients and servers from master between 1.5 and 1.6
* can have corrupted a principal's keys in the HDB. If some
* are bogus but not all are, then that must have happened.
*
* If all keys are bogus then the server may be a pre-1.6,
* post-1.5 server and the client lacks get-keys privilege, or
* the keys are corrupted. We can't tell here.
*/
if (kadm5_all_keys_are_bogus(princ.n_key_data, princ.key_data)) {
krb5_warnx(context, "user lacks get-keys privilege for %s",
unparsed);
goto out;
}
if (kadm5_some_keys_are_bogus(princ.n_key_data, princ.key_data)) {
krb5_warnx(context, "some keys for %s are corrupted in the HDB",
unparsed);
}
keys = calloc(sizeof(*keys), princ.n_key_data);
if (keys == NULL) {
ret = krb5_enomem(context);
goto out;
}
for (i = 0; i < princ.n_key_data; i++) {
krb5_key_data *kd = &princ.key_data[i];
/* Don't extract bogus keys */
if (kadm5_all_keys_are_bogus(1, kd))
continue;
keys[i].principal = princ.principal;
keys[i].vno = kd->key_data_kvno;
keys[i].keyblock.keytype = kd->key_data_type[0];
keys[i].keyblock.keyvalue.length = kd->key_data_length[0];
keys[i].keyblock.keyvalue.data = kd->key_data_contents[0];
keys[i].timestamp = time(NULL);
n_k++;
}
} else if (e->random_key_flag) {
ret = kadm5_randkey_principal_3(e->kadm_handle, principal, e->keep,
e->nkstuple, e->kstuple, &k, &n_k);
if (ret)
goto out;
keys = calloc(sizeof(*keys), n_k);
if (keys == NULL) {
ret = krb5_enomem(context);
goto out;
}
for (i = 0; i < n_k; i++) {
keys[i].principal = principal;
keys[i].vno = princ.kvno + 1; /* XXX get entry again */
keys[i].keyblock = k[i];
keys[i].timestamp = time(NULL);
}
}
if (n_k == 0)
krb5_warn(context, ret, "no keys written to keytab for %s", unparsed);
for (i = 0; i < n_k; i++) {
ret = krb5_kt_add_entry(context, e->keytab, &keys[i]);
if (ret)
krb5_warn(context, ret, "krb5_kt_add_entry(%lu)", (unsigned long)i);
}
out:
kadm5_free_principal_ent(e->kadm_handle, &princ);
if (k) {
for (i = 0; i < n_k; i++)
memset(k[i].keyvalue.data, 0, k[i].keyvalue.length);
free(k);
}
free(unparsed);
free(keys);
return ret;
}
int
ext_keytab(struct ext_keytab_options *opt, int argc, char **argv)
{
krb5_error_code ret;
struct ext_keytab_data data;
const char *enctypes;
size_t i;
data.kadm_handle = NULL;
ret = kadm5_dup_context(kadm_handle, &data.kadm_handle);
if (ret)
krb5_err(context, 1, ret, "Could not duplicate kadmin connection");
data.random_key_flag = opt->random_key_flag;
data.keep = 1;
i = 0;
if (opt->keepallold_flag) {
data.keep = 2;
i++;
}
if (opt->keepold_flag) {
data.keep = 1;
i++;
}
if (opt->pruneall_flag) {
data.keep = 0;
i++;
}
if (i > 1) {
fprintf(stderr,
"use only one of --keepold, --keepallold, or --pruneall\n");
return EINVAL;
}
if (opt->keytab_string == NULL)
ret = krb5_kt_default(context, &data.keytab);
else
ret = krb5_kt_resolve(context, opt->keytab_string, &data.keytab);
if(ret){
krb5_warn(context, ret, "krb5_kt_resolve");
return 1;
}
enctypes = opt->enctypes_string;
if (enctypes == NULL || enctypes[0] == '\0')
enctypes = krb5_config_get_string(context, NULL, "libdefaults",
"supported_enctypes", NULL);
if (enctypes == NULL || enctypes[0] == '\0')
enctypes = "aes128-cts-hmac-sha1-96";
ret = krb5_string_to_keysalts2(context, enctypes, &data.nkstuple,
&data.kstuple);
if (ret) {
fprintf(stderr, "enctype(s) unknown\n");
krb5_kt_close(context, data.keytab);
return ret;
}
for(i = 0; i < argc; i++) {
ret = foreach_principal(argv[i], do_ext_keytab, "ext", &data);
if (ret)
break;
}
kadm5_destroy(data.kadm_handle);
krb5_kt_close(context, data.keytab);
free(data.kstuple);
return ret != 0;
}
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