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