440 lines
11 KiB
C
440 lines
11 KiB
C
/*
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* Copyright (c) 1997-2002 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 "hprop.h"
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RCSID("$Id: hpropd.c,v 1.35 2002/04/18 10:18:50 joda Exp $");
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#ifdef KRB4
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static des_cblock mkey4;
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static des_key_schedule msched4;
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static char *
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time2str(time_t t)
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{
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static char buf[128];
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strftime(buf, sizeof(buf), "%Y%m%d%H%M", gmtime(&t));
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return buf;
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}
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static int
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dump_krb4(krb5_context context, hdb_entry *ent, int fd)
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{
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char name[ANAME_SZ];
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char instance[INST_SZ];
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char realm[REALM_SZ];
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char buf[1024];
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char *p;
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int i;
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int ret;
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char *princ_name;
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Event *modifier;
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krb5_realm *realms;
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int cmp;
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ret = krb5_524_conv_principal(context, ent->principal,
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name, instance, realm);
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if (ret) {
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krb5_unparse_name(context, ent->principal, &princ_name);
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krb5_warn(context, ret, "%s", princ_name);
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free(princ_name);
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return -1;
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}
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ret = krb5_get_default_realms (context, &realms);
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if (ret) {
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krb5_warn(context, ret, "krb5_get_default_realms");
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return -1;
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}
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cmp = strcmp (realms[0], ent->principal->realm);
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krb5_free_host_realm (context, realms);
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if (cmp != 0)
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return -1;
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snprintf (buf, sizeof(buf), "%s %s ", name,
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(strlen(instance) != 0) ? instance : "*");
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if (ent->max_life) {
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asprintf(&p, "%d", krb_time_to_life(0, *ent->max_life));
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strcat(buf, p);
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free(p);
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} else
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strcat(buf, "255");
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strcat(buf, " ");
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i = 0;
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while (i < ent->keys.len &&
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ent->keys.val[i].key.keytype != KEYTYPE_DES)
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++i;
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if (i == ent->keys.len) {
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krb5_warnx(context, "No DES key for %s.%s", name, instance);
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return -1;
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}
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if (ent->keys.val[i].mkvno)
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asprintf(&p, "%d ", *ent->keys.val[i].mkvno);
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else
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asprintf(&p, "%d ", 1);
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strcat(buf, p);
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free(p);
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asprintf(&p, "%d ", ent->kvno);
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strcat(buf, p);
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free(p);
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asprintf(&p, "%d ", 0); /* Attributes are always 0*/
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strcat(buf, p);
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free(p);
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{
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u_int32_t *key = ent->keys.val[i].key.keyvalue.data;
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kdb_encrypt_key((des_cblock*)key, (des_cblock*)key,
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&mkey4, msched4, DES_ENCRYPT);
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asprintf(&p, "%x %x ", (int)htonl(*key), (int)htonl(*(key+1)));
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strcat(buf, p);
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free(p);
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}
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if (ent->valid_end == NULL)
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strcat(buf, time2str(60*60*24*365*50)); /* no expiration */
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else
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strcat(buf, time2str(*ent->valid_end));
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strcat(buf, " ");
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if (ent->modified_by == NULL)
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modifier = &ent->created_by;
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else
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modifier = ent->modified_by;
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ret = krb5_524_conv_principal(context, modifier->principal,
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name, instance, realm);
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if (ret) {
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krb5_unparse_name(context, modifier->principal, &princ_name);
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krb5_warn(context, ret, "%s", princ_name);
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free(princ_name);
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return -1;
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}
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asprintf(&p, "%s %s %s\n", time2str(modifier->time),
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(strlen(name) != 0) ? name : "*",
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(strlen(instance) != 0) ? instance : "*");
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strcat(buf, p);
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free(p);
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ret = write(fd, buf, strlen(buf));
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if (ret == -1)
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krb5_warnx(context, "write");
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return 0;
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}
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#endif /* KRB4 */
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static int inetd_flag = -1;
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static int help_flag;
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static int version_flag;
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static int print_dump;
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static const char *database = HDB_DEFAULT_DB;
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static int from_stdin;
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static char *local_realm;
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#ifdef KRB4
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static int v4dump;
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#endif
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static char *ktname = NULL;
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struct getargs args[] = {
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{ "database", 'd', arg_string, &database, "database", "file" },
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{ "stdin", 'n', arg_flag, &from_stdin, "read from stdin" },
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{ "print", 0, arg_flag, &print_dump, "print dump to stdout" },
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{ "inetd", 'i', arg_negative_flag, &inetd_flag,
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"Not started from inetd" },
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{ "keytab", 'k', arg_string, &ktname, "keytab to use for authentication", "keytab" },
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{ "realm", 'r', arg_string, &local_realm, "realm to use" },
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#ifdef KRB4
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{ "v4dump", '4', arg_flag, &v4dump, "create v4 type DB" },
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#endif
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{ "version", 0, arg_flag, &version_flag, NULL, NULL },
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{ "help", 'h', arg_flag, &help_flag, NULL, NULL}
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};
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static int num_args = sizeof(args) / sizeof(args[0]);
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static void
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usage(int ret)
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{
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arg_printusage (args, num_args, NULL, "");
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exit (ret);
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}
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int
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main(int argc, char **argv)
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{
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krb5_error_code ret;
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krb5_context context;
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krb5_auth_context ac = NULL;
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krb5_principal c1, c2;
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krb5_authenticator authent;
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krb5_keytab keytab;
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int fd;
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HDB *db;
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int optind = 0;
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char *tmp_db;
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krb5_log_facility *fac;
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int nprincs;
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#ifdef KRB4
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int e;
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int fd_out = -1;
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#endif
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setprogname(argv[0]);
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ret = krb5_init_context(&context);
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if(ret)
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exit(1);
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ret = krb5_openlog(context, "hpropd", &fac);
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if(ret)
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;
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krb5_set_warn_dest(context, fac);
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if(getarg(args, num_args, argc, argv, &optind))
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usage(1);
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#ifdef KRB4
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if (v4dump && database == HDB_DEFAULT_DB)
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database = "/var/kerberos/524_dump";
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#endif /* KRB4 */
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if(local_realm != NULL)
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krb5_set_default_realm(context, local_realm);
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if(help_flag)
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usage(0);
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if(version_flag) {
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print_version(NULL);
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exit(0);
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}
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argc -= optind;
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argv += optind;
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if (argc != 0)
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usage(1);
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if(from_stdin)
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fd = STDIN_FILENO;
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else {
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struct sockaddr_storage ss;
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struct sockaddr *sa = (struct sockaddr *)&ss;
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socklen_t sin_len = sizeof(ss);
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char addr_name[256];
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krb5_ticket *ticket;
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char *server;
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fd = STDIN_FILENO;
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if (inetd_flag == -1) {
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if (getpeername (fd, sa, &sin_len) < 0)
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inetd_flag = 0;
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else
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inetd_flag = 1;
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}
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if (!inetd_flag) {
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mini_inetd (krb5_getportbyname (context, "hprop", "tcp",
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HPROP_PORT));
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}
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sin_len = sizeof(ss);
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if(getpeername(fd, sa, &sin_len) < 0)
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krb5_err(context, 1, errno, "getpeername");
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if (inet_ntop(sa->sa_family,
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socket_get_address (sa),
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addr_name,
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sizeof(addr_name)) == NULL)
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strlcpy (addr_name, "unknown address",
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sizeof(addr_name));
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krb5_log(context, fac, 0, "Connection from %s", addr_name);
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ret = krb5_kt_register(context, &hdb_kt_ops);
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if(ret)
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krb5_err(context, 1, ret, "krb5_kt_register");
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if (ktname != NULL) {
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ret = krb5_kt_resolve(context, ktname, &keytab);
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if (ret)
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krb5_err (context, 1, ret, "krb5_kt_resolve %s", ktname);
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} else {
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ret = krb5_kt_default (context, &keytab);
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if (ret)
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krb5_err (context, 1, ret, "krb5_kt_default");
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}
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ret = krb5_recvauth(context, &ac, &fd, HPROP_VERSION, NULL,
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0, keytab, &ticket);
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if(ret)
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krb5_err(context, 1, ret, "krb5_recvauth");
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ret = krb5_unparse_name(context, ticket->server, &server);
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if (ret)
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krb5_err(context, 1, ret, "krb5_unparse_name");
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if (strncmp(server, "hprop/", 5) != 0)
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krb5_errx(context, 1, "ticket not for hprop (%s)", server);
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free(server);
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krb5_free_ticket (context, ticket);
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ret = krb5_auth_con_getauthenticator(context, ac, &authent);
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if(ret)
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krb5_err(context, 1, ret, "krb5_auth_con_getauthenticator");
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ret = krb5_make_principal(context, &c1, NULL, "kadmin", "hprop", NULL);
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if(ret)
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krb5_err(context, 1, ret, "krb5_make_principal");
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principalname2krb5_principal(&c2, authent->cname, authent->crealm);
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if(!krb5_principal_compare(context, c1, c2)) {
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char *s;
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krb5_unparse_name(context, c2, &s);
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krb5_errx(context, 1, "Unauthorized connection from %s", s);
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}
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krb5_free_principal(context, c1);
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krb5_free_principal(context, c2);
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ret = krb5_kt_close(context, keytab);
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if(ret)
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krb5_err(context, 1, ret, "krb5_kt_close");
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}
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if(!print_dump) {
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asprintf(&tmp_db, "%s~", database);
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#ifdef KRB4
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if (v4dump) {
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fd_out = open(tmp_db, O_WRONLY | O_CREAT | O_TRUNC, 0600);
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if (fd_out == -1)
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krb5_errx(context, 1, "%s", strerror(errno));
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}
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else
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#endif /* KRB4 */
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{
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ret = hdb_create(context, &db, tmp_db);
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if(ret)
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krb5_err(context, 1, ret, "hdb_create(%s)", tmp_db);
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ret = db->open(context, db, O_RDWR | O_CREAT | O_TRUNC, 0600);
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if(ret)
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krb5_err(context, 1, ret, "hdb_open(%s)", tmp_db);
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}
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}
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#ifdef KRB4
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if (v4dump) {
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e = kdb_get_master_key(0, &mkey4, msched4);
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if(e)
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krb5_errx(context, 1, "kdb_get_master_key: %s",
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krb_get_err_text(e));
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}
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#endif /* KRB4 */
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nprincs = 0;
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while(1){
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krb5_data data;
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hdb_entry entry;
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if(from_stdin) {
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ret = krb5_read_message(context, &fd, &data);
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if(ret != 0 && ret != HEIM_ERR_EOF)
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krb5_err(context, 1, ret, "krb5_read_message");
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} else {
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ret = krb5_read_priv_message(context, ac, &fd, &data);
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if(ret)
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krb5_err(context, 1, ret, "krb5_read_priv_message");
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}
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if(ret == HEIM_ERR_EOF || data.length == 0) {
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if(!from_stdin) {
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data.data = NULL;
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data.length = 0;
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krb5_write_priv_message(context, ac, &fd, &data);
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}
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if(!print_dump) {
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#ifdef KRB4
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if (v4dump) {
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ret = rename(tmp_db, database);
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if (ret)
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krb5_errx(context, 1, "rename");
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ret = close(fd_out);
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if (ret)
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krb5_errx(context, 1, "close");
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} else
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#endif /* KRB4 */
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{
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ret = db->rename(context, db, database);
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if(ret)
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krb5_err(context, 1, ret, "db_rename");
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ret = db->close(context, db);
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if(ret)
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krb5_err(context, 1, ret, "db_close");
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}
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}
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break;
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}
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ret = hdb_value2entry(context, &data, &entry);
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if(ret)
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krb5_err(context, 1, ret, "hdb_value2entry");
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if(print_dump)
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hdb_print_entry(context, db, &entry, stdout);
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else {
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#ifdef KRB4
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if (v4dump) {
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ret = dump_krb4(context, &entry, fd_out);
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if(!ret) nprincs++;
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}
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else
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#endif /* KRB4 */
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{
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ret = db->store(context, db, 0, &entry);
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if(ret == HDB_ERR_EXISTS) {
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char *s;
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krb5_unparse_name(context, entry.principal, &s);
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krb5_warnx(context, "Entry exists: %s", s);
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free(s);
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} else if(ret)
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krb5_err(context, 1, ret, "db_store");
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else
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nprincs++;
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}
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}
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hdb_free_entry(context, &entry);
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}
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if (!print_dump)
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krb5_log(context, fac, 0, "Received %d principals", nprincs);
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exit(0);
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}
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