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