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heimdal/kdc/hpropd.c

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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 "hprop.h"
static int inetd_flag = -1;
static int help_flag;
static int version_flag;
static int print_dump;
static const char *database;
static int from_stdin;
static char *local_realm;
static char *ktname = NULL;
struct getargs args[] = {
{ "database", 'd', arg_string, rk_UNCONST(&database), "database", "file" },
{ "stdin", 'n', arg_flag, &from_stdin, "read from stdin", NULL },
{ "print", 0, arg_flag, &print_dump, "print dump to stdout", NULL },
#ifdef SUPPORT_INETD
{ "inetd", 'i', arg_negative_flag, &inetd_flag,
"Not started from inetd", NULL },
#endif
{ "keytab", 'k', arg_string, &ktname, "keytab to use for authentication", "keytab" },
{ "realm", 'r', arg_string, &local_realm, "realm to use", NULL },
{ "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 char unparseable_name[] = "unparseable name";
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;
krb5_socket_t sock = rk_INVALID_SOCKET;
HDB *db = NULL;
int optidx = 0;
char *tmp_db;
krb5_log_facility *fac;
int nprincs;
setprogname(argv[0]);
ret = krb5_init_context(&context);
if (ret)
exit(1);
ret = krb5_openlog(context, "hpropd", &fac);
if (ret)
errx(1, "krb5_openlog");
krb5_set_warn_dest(context, fac);
if (getarg(args, num_args, argc, argv, &optidx))
usage(1);
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 -= optidx;
argv += optidx;
if (argc != 0)
usage(1);
if (database == NULL)
database = hdb_default_db(context);
if (from_stdin) {
sock = 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;
sock = STDIN_FILENO;
#ifdef SUPPORT_INETD
if (inetd_flag == -1) {
if (getpeername (sock, sa, &sin_len) < 0) {
inetd_flag = 0;
} else {
inetd_flag = 1;
}
}
#else
inetd_flag = 0;
#endif
if (!inetd_flag) {
mini_inetd (krb5_getportbyname (context, "hprop", "tcp",
HPROP_PORT), &sock);
}
sin_len = sizeof(ss);
if (getpeername(sock, sa, &sin_len) < 0)
krb5_err(context, 1, errno, "getpeername");
if (inet_ntop(ss.ss_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_get_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, &sock, 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(context, &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) {
int aret;
aret = asprintf(&tmp_db, "%s~", database);
if (aret == -1)
krb5_errx(context, 1, "hdb_create: out of memory");
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);
}
nprincs = 0;
while (1){
krb5_data data;
hdb_entry_ex entry;
if (from_stdin) {
ret = krb5_read_message(context, &sock, &data);
if (ret != 0 && ret != HEIM_ERR_EOF)
krb5_err(context, 1, ret, "krb5_read_message");
} else {
ret = krb5_read_priv_message(context, ac, &sock, &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, &sock, &data);
}
if (!print_dump) {
ret = db->hdb_close(context, db);
if (ret)
krb5_err(context, 1, ret, "db_close");
ret = db->hdb_rename(context, db, database);
if (ret)
krb5_err(context, 1, ret, "db_rename");
}
break;
}
memset(&entry, 0, sizeof(entry));
ret = hdb_value2entry(context, &data, &entry.entry);
krb5_data_free(&data);
if (ret)
krb5_err(context, 1, ret, "hdb_value2entry");
if (print_dump) {
struct hdb_print_entry_arg parg;
parg.out = stdout;
parg.fmt = HDB_DUMP_HEIMDAL;
hdb_print_entry(context, db, &entry, &parg);
} else {
ret = db->hdb_store(context, db, 0, &entry);
if (ret == HDB_ERR_EXISTS) {
char *s;
ret = krb5_unparse_name(context, entry.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);
if (inetd_flag == 0)
rk_closesocket(sock);
exit(0);
}
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