/* $NetBSD: hpropd.c,v 1.2.22.1 2023/08/11 13:39:55 martin Exp $ */ /* * 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; #ifndef __clang_analyzer__ argv += optidx; #endif 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; memset(&ss, 0, sizeof(ss)); 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(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_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); }