OpenBSD-4.6/kerberosV/src/kdc/hpropd.c
/*
* Copyright (c) 1997-2004 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 "hprop.h"
RCSID("$KTH: hpropd.c,v 1.40 2005/04/24 13:48:08 lha Exp $");
#ifdef KRB4
#include <krb.h>
#include <prot.h>
#define Principal Principal4
#include <krb_db.h>
static des_cblock mkey4;
static des_key_schedule msched4;
static char *
time2str(time_t t)
{
static char buf[128];
strftime(buf, sizeof(buf), "%Y%m%d%H%M", gmtime(&t));
return buf;
}
static int
dump_krb4(krb5_context context, hdb_entry *ent, int fd)
{
char name[ANAME_SZ];
char instance[INST_SZ];
char realm[REALM_SZ];
char buf[1024];
char *p;
int i;
int ret;
char *princ_name;
Event *modifier;
krb5_realm *realms;
int cmp;
ret = krb5_524_conv_principal(context, ent->principal,
name, instance, realm);
if (ret) {
ret = krb5_unparse_name(context, ent->principal, &princ_name);
if (ret == 0) {
krb5_warn(context, ret, "%s", princ_name);
free(princ_name);
}
return -1;
}
ret = krb5_get_default_realms (context, &realms);
if (ret) {
krb5_warn(context, ret, "krb5_get_default_realms");
return -1;
}
cmp = strcmp (realms[0], ent->principal->realm);
krb5_free_host_realm (context, realms);
if (cmp != 0)
return -1;
snprintf (buf, sizeof(buf), "%s %s ", name,
(strlen(instance) != 0) ? instance : "*");
if (ent->max_life) {
asprintf(&p, "%d", krb_time_to_life(0, *ent->max_life));
strlcat(buf, p, sizeof(buf));
free(p);
} else
strlcat(buf, "255", sizeof(buf));
strlcat(buf, " ", sizeof(buf));
i = 0;
while (i < ent->keys.len &&
ent->keys.val[i].key.keytype != KEYTYPE_DES)
++i;
if (i == ent->keys.len) {
krb5_warnx(context, "No DES key for %s.%s", name, instance);
return -1;
}
if (ent->keys.val[i].mkvno)
asprintf(&p, "%d ", *ent->keys.val[i].mkvno);
else
asprintf(&p, "%d ", 1);
strlcat(buf, p, sizeof(buf));
free(p);
asprintf(&p, "%d ", ent->kvno);
strlcat(buf, p, sizeof(buf));
free(p);
asprintf(&p, "%d ", 0); /* Attributes are always 0*/
strlcat(buf, p, sizeof(buf));
free(p);
{
u_int32_t *key = ent->keys.val[i].key.keyvalue.data;
kdb_encrypt_key((des_cblock*)key, (des_cblock*)key,
&mkey4, msched4, DES_ENCRYPT);
asprintf(&p, "%x %x ", (int)htonl(*key), (int)htonl(*(key+1)));
strlcat(buf, p, sizeof(buf));
free(p);
}
if (ent->valid_end == NULL)
strlcat(buf, time2str(60*60*24*365*50), sizeof(buf)); /*no expiration*/
else
strlcat(buf, time2str(*ent->valid_end), sizeof(buf));
strlcat(buf, " ", sizeof(buf));
if (ent->modified_by == NULL)
modifier = &ent->created_by;
else
modifier = ent->modified_by;
ret = krb5_524_conv_principal(context, modifier->principal,
name, instance, realm);
if (ret) {
ret = krb5_unparse_name(context, modifier->principal, &princ_name);
if (ret == 0) {
krb5_warn(context, ret, "%s", princ_name);
free(princ_name);
}
return -1;
}
asprintf(&p, "%s %s %s\n", time2str(modifier->time),
(strlen(name) != 0) ? name : "*",
(strlen(instance) != 0) ? instance : "*");
strlcat(buf, p, sizeof(buf));
free(p);
ret = write(fd, buf, strlen(buf));
if (ret == -1)
krb5_warnx(context, "write");
return 0;
}
#endif /* KRB4 */
static int inetd_flag = -1;
static int help_flag;
static int version_flag;
static int print_dump;
static const char *database = HDB_DEFAULT_DB;
static int from_stdin;
static char *local_realm;
#ifdef KRB4
static int v4dump;
#endif
static char *ktname = NULL;
struct getargs args[] = {
{ "database", 'd', arg_string, &database, "database", "file" },
{ "stdin", 'n', arg_flag, &from_stdin, "read from stdin" },
{ "print", 0, arg_flag, &print_dump, "print dump to stdout" },
{ "inetd", 'i', arg_negative_flag, &inetd_flag,
"Not started from inetd" },
{ "keytab", 'k', arg_string, &ktname, "keytab to use for authentication", "keytab" },
{ "realm", 'r', arg_string, &local_realm, "realm to use" },
#ifdef KRB4
{ "v4dump", '4', arg_flag, &v4dump, "create v4 type DB" },
#endif
{ "version", 0, arg_flag, &version_flag, NULL, NULL },
{ "help", 'h', arg_flag, &help_flag, NULL, NULL}
};
static int num_args = sizeof(args) / sizeof(args[0]);
static void
usage(int ret)
{
arg_printusage (args, num_args, NULL, "");
exit (ret);
}
int
main(int argc, char **argv)
{
krb5_error_code ret;
krb5_context context;
krb5_auth_context ac = NULL;
krb5_principal c1, c2;
krb5_authenticator authent;
krb5_keytab keytab;
int fd;
HDB *db;
int optind = 0;
char *tmp_db;
krb5_log_facility *fac;
int nprincs;
#ifdef KRB4
int e;
int fd_out = -1;
#endif
ret = krb5_init_context(&context);
if(ret)
exit(1);
ret = krb5_openlog(context, "hpropd", &fac);
if(ret)
;
krb5_set_warn_dest(context, fac);
if(getarg(args, num_args, argc, argv, &optind))
usage(1);
#ifdef KRB4
if (v4dump && database == HDB_DEFAULT_DB)
database = "/var/kerberos/524_dump";
#endif /* KRB4 */
if(local_realm != NULL)
krb5_set_default_realm(context, local_realm);
if(help_flag)
usage(0);
if(version_flag) {
print_version(NULL);
exit(0);
}
argc -= optind;
argv += optind;
if (argc != 0)
usage(1);
if(from_stdin)
fd = STDIN_FILENO;
else {
struct sockaddr_storage ss;
struct sockaddr *sa = (struct sockaddr *)&ss;
socklen_t sin_len = sizeof(ss);
char addr_name[256];
krb5_ticket *ticket;
char *server;
fd = STDIN_FILENO;
if (inetd_flag == -1) {
if (getpeername (fd, sa, &sin_len) < 0)
inetd_flag = 0;
else
inetd_flag = 1;
}
if (!inetd_flag) {
mini_inetd (krb5_getportbyname (context, "hprop", "tcp",
HPROP_PORT));
}
sin_len = sizeof(ss);
if(getpeername(fd, sa, &sin_len) < 0)
krb5_err(context, 1, errno, "getpeername");
if (inet_ntop(sa->sa_family,
socket_get_address (sa),
addr_name,
sizeof(addr_name)) == NULL)
strlcpy (addr_name, "unknown address",
sizeof(addr_name));
krb5_log(context, fac, 0, "Connection from %s", addr_name);
ret = krb5_kt_register(context, &hdb_kt_ops);
if(ret)
krb5_err(context, 1, ret, "krb5_kt_register");
if (ktname != NULL) {
ret = krb5_kt_resolve(context, ktname, &keytab);
if (ret)
krb5_err (context, 1, ret, "krb5_kt_resolve %s", ktname);
} else {
ret = krb5_kt_default (context, &keytab);
if (ret)
krb5_err (context, 1, ret, "krb5_kt_default");
}
ret = krb5_recvauth(context, &ac, &fd, HPROP_VERSION, NULL,
0, keytab, &ticket);
if(ret)
krb5_err(context, 1, ret, "krb5_recvauth");
ret = krb5_unparse_name(context, ticket->server, &server);
if (ret)
krb5_err(context, 1, ret, "krb5_unparse_name");
if (strncmp(server, "hprop/", 5) != 0)
krb5_errx(context, 1, "ticket not for hprop (%s)", server);
free(server);
krb5_free_ticket (context, ticket);
ret = krb5_auth_con_getauthenticator(context, ac, &authent);
if(ret)
krb5_err(context, 1, ret, "krb5_auth_con_getauthenticator");
ret = krb5_make_principal(context, &c1, NULL, "kadmin", "hprop", NULL);
if(ret)
krb5_err(context, 1, ret, "krb5_make_principal");
_krb5_principalname2krb5_principal(&c2,
authent->cname, authent->crealm);
if(!krb5_principal_compare(context, c1, c2)) {
char *s;
ret = krb5_unparse_name(context, c2, &s);
if (ret)
s = "unparseable name";
krb5_errx(context, 1, "Unauthorized connection from %s", s);
}
krb5_free_principal(context, c1);
krb5_free_principal(context, c2);
ret = krb5_kt_close(context, keytab);
if(ret)
krb5_err(context, 1, ret, "krb5_kt_close");
}
if(!print_dump) {
asprintf(&tmp_db, "%s~", database);
#ifdef KRB4
if (v4dump) {
fd_out = open(tmp_db, O_WRONLY | O_CREAT | O_TRUNC, 0600);
if (fd_out == -1)
krb5_errx(context, 1, "%s", strerror(errno));
}
else
#endif /* KRB4 */
{
ret = hdb_create(context, &db, tmp_db);
if(ret)
krb5_err(context, 1, ret, "hdb_create(%s)", tmp_db);
ret = db->hdb_open(context, db, O_RDWR | O_CREAT | O_TRUNC, 0600);
if(ret)
krb5_err(context, 1, ret, "hdb_open(%s)", tmp_db);
}
}
#ifdef KRB4
if (v4dump) {
e = kdb_get_master_key(0, &mkey4, msched4);
if(e)
krb5_errx(context, 1, "kdb_get_master_key: %s",
krb_get_err_text(e));
}
#endif /* KRB4 */
nprincs = 0;
while(1){
krb5_data data;
hdb_entry entry;
if(from_stdin) {
ret = krb5_read_message(context, &fd, &data);
if(ret != 0 && ret != HEIM_ERR_EOF)
krb5_err(context, 1, ret, "krb5_read_message");
} else {
ret = krb5_read_priv_message(context, ac, &fd, &data);
if(ret)
krb5_err(context, 1, ret, "krb5_read_priv_message");
}
if(ret == HEIM_ERR_EOF || data.length == 0) {
if(!from_stdin) {
data.data = NULL;
data.length = 0;
krb5_write_priv_message(context, ac, &fd, &data);
}
if(!print_dump) {
#ifdef KRB4
if (v4dump) {
ret = rename(tmp_db, database);
if (ret)
krb5_errx(context, 1, "rename");
ret = close(fd_out);
if (ret)
krb5_errx(context, 1, "close");
} else
#endif /* KRB4 */
{
ret = db->hdb_rename(context, db, database);
if(ret)
krb5_err(context, 1, ret, "db_rename");
ret = db->hdb_close(context, db);
if(ret)
krb5_err(context, 1, ret, "db_close");
}
}
break;
}
ret = hdb_value2entry(context, &data, &entry);
if(ret)
krb5_err(context, 1, ret, "hdb_value2entry");
if(print_dump)
hdb_print_entry(context, db, &entry, stdout);
else {
#ifdef KRB4
if (v4dump) {
ret = dump_krb4(context, &entry, fd_out);
if(!ret) nprincs++;
}
else
#endif /* KRB4 */
{
ret = db->hdb_store(context, db, 0, &entry);
if(ret == HDB_ERR_EXISTS) {
char *s;
ret = krb5_unparse_name(context, entry.principal, &s);
if (ret)
s = strdup("unparseable name");
krb5_warnx(context, "Entry exists: %s", s);
free(s);
} else if(ret)
krb5_err(context, 1, ret, "db_store");
else
nprincs++;
}
}
hdb_free_entry(context, &entry);
}
if (!print_dump)
krb5_log(context, fac, 0, "Received %d principals", nprincs);
exit(0);
}