/* $NetBSD: config.c,v 1.3.14.1 2023/08/11 13:39:55 martin Exp $ */ /* * Copyright (c) 2005, PADL Software Pty Ltd. * All rights reserved. * * Portions Copyright (c) 2009 Apple Inc. 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 PADL Software 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 PADL SOFTWARE 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 PADL SOFTWARE 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 "kcm_locl.h" #include #include static const char *config_file; /* location of kcm config file */ size_t max_request = 0; /* maximal size of a request */ char *socket_path = NULL; char *door_path = NULL; static char *max_request_str; /* `max_request' as a string */ int detach_from_console = -1; int daemon_child = -1; static const char *system_cache_name = NULL; static const char *system_keytab = NULL; static const char *system_principal = NULL; static const char *system_server = NULL; static const char *system_perms = NULL; static const char *system_user = NULL; static const char *system_group = NULL; static const char *renew_life = NULL; static const char *ticket_life = NULL; int launchd_flag = 0; int disallow_getting_krbtgt = 0; int name_constraints = -1; static int help_flag; static int version_flag; static struct getargs args[] = { { "cache-name", 0, arg_string, &system_cache_name, "system cache name", "cachename" }, { "config-file", 'c', arg_string, &config_file, "location of config file", "file" }, { "group", 'g', arg_string, &system_group, "system cache group", "group" }, { "max-request", 0, arg_string, &max_request, "max size for a kcm-request", "size" }, { "launchd", 0, arg_flag, &launchd_flag, "when in use by launchd", NULL }, { "detach", 0 , arg_flag, &detach_from_console, "detach from console", NULL }, { "daemon-child", 0 , arg_integer, &daemon_child, "private argument, do not use", NULL }, { "help", 'h', arg_flag, &help_flag, NULL, NULL }, { "system-principal", 'k', arg_string, &system_principal, "system principal name", "principal" }, { "lifetime", 'l', arg_string, &ticket_life, "lifetime of system tickets", "time" }, { "mode", 'm', arg_string, &system_perms, "octal mode of system cache", "mode" }, { "name-constraints", 'n', arg_negative_flag, &name_constraints, "disable credentials cache name constraints", NULL }, { "disallow-getting-krbtgt", 0, arg_flag, &disallow_getting_krbtgt, "disable fetching krbtgt from the cache", NULL }, { "renewable-life", 'r', arg_string, &renew_life, "renewable lifetime of system tickets", "time" }, { "socket-path", 's', arg_string, &socket_path, "path to kcm domain socket", "path" }, #ifdef HAVE_DOOR_CREATE { "door-path", 's', arg_string, &door_path, "path to kcm door", "path" }, #endif { "server", 'S', arg_string, &system_server, "server to get system ticket for", "principal" }, { "keytab", 't', arg_string, &system_keytab, "system keytab name", "keytab" }, { "user", 'u', arg_string, &system_user, "system cache owner", "user" }, { "version", 'v', arg_flag, &version_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); } static int parse_owners(kcm_ccache ccache) { uid_t uid = 0; gid_t gid = 0; struct group *gr; int uid_p = 0; int gid_p = 0; struct passwd pw, *pwd = NULL; char pwbuf[2048]; if (system_user != NULL) { if (isdigit((unsigned char)system_user[0])) { if (rk_getpwuid_r(atoi(system_user), &pw, pwbuf, sizeof(pwbuf), &pwd) != 0) pwd = NULL; } else { if (rk_getpwnam_r(system_user, &pw, pwbuf, sizeof(pwbuf), &pwd) != 0) pwd = NULL; } if (pwd == NULL) { return errno; } system_user = strdup(pwd->pw_name); if (system_user == NULL) { return ENOMEM; } uid = pwd->pw_uid; uid_p = 1; gid = pwd->pw_gid; gid_p = 1; } if (system_group != NULL) { if (isdigit((unsigned char)system_group[0])) { gr = getgrgid(atoi(system_group)); } else { gr = getgrnam(system_group); } if (gr == NULL) { return errno; } gid = gr->gr_gid; gid_p = 1; } if (uid_p) ccache->uid = uid; else ccache->uid = 0; /* geteuid() XXX */ if (gid_p) ccache->gid = gid; else ccache->gid = 0; /* getegid() XXX */ return 0; } static const char * kcm_system_config_get_string(const char *string) { return krb5_config_get_string(kcm_context, NULL, "kcm", "system_ccache", string, NULL); } static krb5_error_code ccache_init_system(void) { kcm_ccache ccache; krb5_error_code ret; if (system_cache_name == NULL) system_cache_name = kcm_system_config_get_string("cc_name"); ret = kcm_ccache_new(kcm_context, system_cache_name ? system_cache_name : "SYSTEM", &ccache); if (ret) return ret; ccache->flags |= KCM_FLAGS_OWNER_IS_SYSTEM; ccache->flags |= KCM_FLAGS_USE_KEYTAB; ret = parse_owners(ccache); if (ret) return ret; ret = krb5_parse_name(kcm_context, system_principal, &ccache->client); if (ret) { kcm_release_ccache(kcm_context, ccache); return ret; } if (system_server == NULL) system_server = kcm_system_config_get_string("server"); if (system_server != NULL) { ret = krb5_parse_name(kcm_context, system_server, &ccache->server); if (ret) { kcm_release_ccache(kcm_context, ccache); return ret; } } if (system_keytab == NULL) system_keytab = kcm_system_config_get_string("keytab_name"); if (system_keytab != NULL) { ret = krb5_kt_resolve(kcm_context, system_keytab, &ccache->key.keytab); } else { ret = krb5_kt_default(kcm_context, &ccache->key.keytab); } if (ret) { kcm_release_ccache(kcm_context, ccache); return ret; } if (renew_life == NULL) renew_life = kcm_system_config_get_string("renew_life"); if (renew_life == NULL) renew_life = "6 months"; if (renew_life != NULL) { ccache->renew_life = parse_time(renew_life, "s"); if (ccache->renew_life < 0) { kcm_release_ccache(kcm_context, ccache); return EINVAL; } } if (ticket_life == NULL) ticket_life = kcm_system_config_get_string("ticket_life"); if (ticket_life != NULL) { ccache->tkt_life = parse_time(ticket_life, "s"); if (ccache->tkt_life < 0) { kcm_release_ccache(kcm_context, ccache); return EINVAL; } } if (system_perms == NULL) system_perms = kcm_system_config_get_string("mode"); if (system_perms != NULL) { int mode; if (sscanf(system_perms, "%o", &mode) != 1) return EINVAL; ccache->mode = mode; } if (disallow_getting_krbtgt == -1) { disallow_getting_krbtgt = krb5_config_get_bool_default(kcm_context, NULL, FALSE, "kcm", "disallow-getting-krbtgt", NULL); } /* enqueue default actions for credentials cache */ ret = kcm_ccache_enqueue_default(kcm_context, ccache, NULL); kcm_release_ccache(kcm_context, ccache); /* retained by event queue */ return ret; } void kcm_configure(int argc, char **argv) { krb5_error_code ret; int optidx = 0; const char *p; while (getarg(args, num_args, argc, argv, &optidx)) warnx("error at argument `%s'", argv[optidx]); 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); { char **files; if(config_file == NULL) config_file = _PATH_KCM_CONF; ret = krb5_prepend_config_files_default(config_file, &files); if (ret) krb5_err(kcm_context, 1, ret, "getting configuration files"); ret = krb5_set_config_files(kcm_context, files); krb5_free_config_files(files); if(ret) krb5_err(kcm_context, 1, ret, "reading configuration files"); } if(max_request_str) max_request = parse_bytes(max_request_str, NULL); if(max_request == 0){ p = krb5_config_get_string (kcm_context, NULL, "kcm", "max-request", NULL); if(p) max_request = parse_bytes(p, NULL); } if (system_principal == NULL) { system_principal = kcm_system_config_get_string("principal"); } if (system_principal != NULL) { ret = ccache_init_system(); if (ret) krb5_err(kcm_context, 1, ret, "initializing system ccache"); } if(detach_from_console == -1) detach_from_console = krb5_config_get_bool_default(kcm_context, NULL, FALSE, "kcm", "detach", NULL); kcm_openlog(); if(max_request == 0) max_request = 64 * 1024; }