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| Current File : //usr/src/crypto/heimdal/lib/krb5/verify_krb5_conf.c |
/*
* Copyright (c) 1999 - 2005 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 "krb5_locl.h"
#include <getarg.h>
#include <parse_bytes.h>
#include <err.h>
RCSID("$Id: verify_krb5_conf.c 22233 2007-12-08 21:43:37Z lha $");
/* verify krb5.conf */
static int dumpconfig_flag = 0;
static int version_flag = 0;
static int help_flag = 0;
static int warn_mit_syntax_flag = 0;
static struct getargs args[] = {
{"dumpconfig", 0, arg_flag, &dumpconfig_flag,
"show the parsed config files", NULL },
{"warn-mit-syntax", 0, arg_flag, &warn_mit_syntax_flag,
"show the parsed config files", NULL },
{"version", 0, arg_flag, &version_flag,
"print version", NULL },
{"help", 0, arg_flag, &help_flag,
NULL, NULL }
};
static void
usage (int ret)
{
arg_printusage (args,
sizeof(args)/sizeof(*args),
NULL,
"[config-file]");
exit (ret);
}
static int
check_bytes(krb5_context context, const char *path, char *data)
{
if(parse_bytes(data, NULL) == -1) {
krb5_warnx(context, "%s: failed to parse \"%s\" as size", path, data);
return 1;
}
return 0;
}
static int
check_time(krb5_context context, const char *path, char *data)
{
if(parse_time(data, NULL) == -1) {
krb5_warnx(context, "%s: failed to parse \"%s\" as time", path, data);
return 1;
}
return 0;
}
static int
check_numeric(krb5_context context, const char *path, char *data)
{
long int v;
char *end;
v = strtol(data, &end, 0);
if(*end != '\0') {
krb5_warnx(context, "%s: failed to parse \"%s\" as a number",
path, data);
return 1;
}
return 0;
}
static int
check_boolean(krb5_context context, const char *path, char *data)
{
long int v;
char *end;
if(strcasecmp(data, "yes") == 0 ||
strcasecmp(data, "true") == 0 ||
strcasecmp(data, "no") == 0 ||
strcasecmp(data, "false") == 0)
return 0;
v = strtol(data, &end, 0);
if(*end != '\0') {
krb5_warnx(context, "%s: failed to parse \"%s\" as a boolean",
path, data);
return 1;
}
if(v != 0 && v != 1)
krb5_warnx(context, "%s: numeric value \"%s\" is treated as \"true\"",
path, data);
return 0;
}
static int
check_524(krb5_context context, const char *path, char *data)
{
if(strcasecmp(data, "yes") == 0 ||
strcasecmp(data, "no") == 0 ||
strcasecmp(data, "2b") == 0 ||
strcasecmp(data, "local") == 0)
return 0;
krb5_warnx(context, "%s: didn't contain a valid option `%s'",
path, data);
return 1;
}
static int
check_host(krb5_context context, const char *path, char *data)
{
int ret;
char hostname[128];
const char *p = data;
struct addrinfo hints;
char service[32];
int defport;
struct addrinfo *ai;
hints.ai_flags = 0;
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = 0;
hints.ai_protocol = 0;
hints.ai_addrlen = 0;
hints.ai_canonname = NULL;
hints.ai_addr = NULL;
hints.ai_next = NULL;
/* XXX data could be a list of hosts that this code can't handle */
/* XXX copied from krbhst.c */
if(strncmp(p, "http://", 7) == 0){
p += 7;
hints.ai_socktype = SOCK_STREAM;
strlcpy(service, "http", sizeof(service));
defport = 80;
} else if(strncmp(p, "http/", 5) == 0) {
p += 5;
hints.ai_socktype = SOCK_STREAM;
strlcpy(service, "http", sizeof(service));
defport = 80;
}else if(strncmp(p, "tcp/", 4) == 0){
p += 4;
hints.ai_socktype = SOCK_STREAM;
strlcpy(service, "kerberos", sizeof(service));
defport = 88;
} else if(strncmp(p, "udp/", 4) == 0) {
p += 4;
hints.ai_socktype = SOCK_DGRAM;
strlcpy(service, "kerberos", sizeof(service));
defport = 88;
} else {
hints.ai_socktype = SOCK_DGRAM;
strlcpy(service, "kerberos", sizeof(service));
defport = 88;
}
if(strsep_copy(&p, ":", hostname, sizeof(hostname)) < 0) {
return 1;
}
hostname[strcspn(hostname, "/")] = '\0';
if(p != NULL) {
char *end;
int tmp = strtol(p, &end, 0);
if(end == p) {
krb5_warnx(context, "%s: failed to parse port number in %s",
path, data);
return 1;
}
defport = tmp;
snprintf(service, sizeof(service), "%u", defport);
}
ret = getaddrinfo(hostname, service, &hints, &ai);
if(ret == EAI_SERVICE && !isdigit((unsigned char)service[0])) {
snprintf(service, sizeof(service), "%u", defport);
ret = getaddrinfo(hostname, service, &hints, &ai);
}
if(ret != 0) {
krb5_warnx(context, "%s: %s (%s)", path, gai_strerror(ret), hostname);
return 1;
}
return 0;
}
static int
mit_entry(krb5_context context, const char *path, char *data)
{
if (warn_mit_syntax_flag)
krb5_warnx(context, "%s is only used by MIT Kerberos", path);
return 0;
}
struct s2i {
const char *s;
int val;
};
#define L(X) { #X, LOG_ ## X }
static struct s2i syslogvals[] = {
/* severity */
L(EMERG),
L(ALERT),
L(CRIT),
L(ERR),
L(WARNING),
L(NOTICE),
L(INFO),
L(DEBUG),
/* facility */
L(AUTH),
#ifdef LOG_AUTHPRIV
L(AUTHPRIV),
#endif
#ifdef LOG_CRON
L(CRON),
#endif
L(DAEMON),
#ifdef LOG_FTP
L(FTP),
#endif
L(KERN),
L(LPR),
L(MAIL),
#ifdef LOG_NEWS
L(NEWS),
#endif
L(SYSLOG),
L(USER),
#ifdef LOG_UUCP
L(UUCP),
#endif
L(LOCAL0),
L(LOCAL1),
L(LOCAL2),
L(LOCAL3),
L(LOCAL4),
L(LOCAL5),
L(LOCAL6),
L(LOCAL7),
{ NULL, -1 }
};
static int
find_value(const char *s, struct s2i *table)
{
while(table->s && strcasecmp(table->s, s))
table++;
return table->val;
}
static int
check_log(krb5_context context, const char *path, char *data)
{
/* XXX sync with log.c */
int min = 0, max = -1, n;
char c;
const char *p = data;
n = sscanf(p, "%d%c%d/", &min, &c, &max);
if(n == 2){
if(c == '/') {
if(min < 0){
max = -min;
min = 0;
}else{
max = min;
}
}
}
if(n){
p = strchr(p, '/');
if(p == NULL) {
krb5_warnx(context, "%s: failed to parse \"%s\"", path, data);
return 1;
}
p++;
}
if(strcmp(p, "STDERR") == 0 ||
strcmp(p, "CONSOLE") == 0 ||
(strncmp(p, "FILE", 4) == 0 && (p[4] == ':' || p[4] == '=')) ||
(strncmp(p, "DEVICE", 6) == 0 && p[6] == '='))
return 0;
if(strncmp(p, "SYSLOG", 6) == 0){
int ret = 0;
char severity[128] = "";
char facility[128] = "";
p += 6;
if(*p != '\0')
p++;
if(strsep_copy(&p, ":", severity, sizeof(severity)) != -1)
strsep_copy(&p, ":", facility, sizeof(facility));
if(*severity == '\0')
strlcpy(severity, "ERR", sizeof(severity));
if(*facility == '\0')
strlcpy(facility, "AUTH", sizeof(facility));
if(find_value(severity, syslogvals) == -1) {
krb5_warnx(context, "%s: unknown syslog facility \"%s\"",
path, facility);
ret++;
}
if(find_value(severity, syslogvals) == -1) {
krb5_warnx(context, "%s: unknown syslog severity \"%s\"",
path, severity);
ret++;
}
return ret;
}else{
krb5_warnx(context, "%s: unknown log type: \"%s\"", path, data);
return 1;
}
}
typedef int (*check_func_t)(krb5_context, const char*, char*);
struct entry {
const char *name;
int type;
void *check_data;
};
struct entry all_strings[] = {
{ "", krb5_config_string, NULL },
{ NULL }
};
struct entry all_boolean[] = {
{ "", krb5_config_string, check_boolean },
{ NULL }
};
struct entry v4_name_convert_entries[] = {
{ "host", krb5_config_list, all_strings },
{ "plain", krb5_config_list, all_strings },
{ NULL }
};
struct entry libdefaults_entries[] = {
{ "accept_null_addresses", krb5_config_string, check_boolean },
{ "capath", krb5_config_list, all_strings },
{ "check_pac", krb5_config_string, check_boolean },
{ "clockskew", krb5_config_string, check_time },
{ "date_format", krb5_config_string, NULL },
{ "default_cc_name", krb5_config_string, NULL },
{ "default_etypes", krb5_config_string, NULL },
{ "default_etypes_des", krb5_config_string, NULL },
{ "default_keytab_modify_name", krb5_config_string, NULL },
{ "default_keytab_name", krb5_config_string, NULL },
{ "default_realm", krb5_config_string, NULL },
{ "dns_canonize_hostname", krb5_config_string, check_boolean },
{ "dns_proxy", krb5_config_string, NULL },
{ "dns_lookup_kdc", krb5_config_string, check_boolean },
{ "dns_lookup_realm", krb5_config_string, check_boolean },
{ "dns_lookup_realm_labels", krb5_config_string, NULL },
{ "egd_socket", krb5_config_string, NULL },
{ "encrypt", krb5_config_string, check_boolean },
{ "extra_addresses", krb5_config_string, NULL },
{ "fcache_version", krb5_config_string, check_numeric },
{ "fcc-mit-ticketflags", krb5_config_string, check_boolean },
{ "forward", krb5_config_string, check_boolean },
{ "forwardable", krb5_config_string, check_boolean },
{ "http_proxy", krb5_config_string, check_host /* XXX */ },
{ "ignore_addresses", krb5_config_string, NULL },
{ "kdc_timeout", krb5_config_string, check_time },
{ "kdc_timesync", krb5_config_string, check_boolean },
{ "log_utc", krb5_config_string, check_boolean },
{ "maxretries", krb5_config_string, check_numeric },
{ "scan_interfaces", krb5_config_string, check_boolean },
{ "srv_lookup", krb5_config_string, check_boolean },
{ "srv_try_txt", krb5_config_string, check_boolean },
{ "ticket_lifetime", krb5_config_string, check_time },
{ "time_format", krb5_config_string, NULL },
{ "transited_realms_reject", krb5_config_string, NULL },
{ "no-addresses", krb5_config_string, check_boolean },
{ "v4_instance_resolve", krb5_config_string, check_boolean },
{ "v4_name_convert", krb5_config_list, v4_name_convert_entries },
{ "verify_ap_req_nofail", krb5_config_string, check_boolean },
{ "max_retries", krb5_config_string, check_time },
{ "renew_lifetime", krb5_config_string, check_time },
{ "proxiable", krb5_config_string, check_boolean },
{ "warn_pwexpire", krb5_config_string, check_time },
/* MIT stuff */
{ "permitted_enctypes", krb5_config_string, mit_entry },
{ "default_tgs_enctypes", krb5_config_string, mit_entry },
{ "default_tkt_enctypes", krb5_config_string, mit_entry },
{ NULL }
};
struct entry appdefaults_entries[] = {
{ "afslog", krb5_config_string, check_boolean },
{ "afs-use-524", krb5_config_string, check_524 },
{ "encrypt", krb5_config_string, check_boolean },
{ "forward", krb5_config_string, check_boolean },
{ "forwardable", krb5_config_string, check_boolean },
{ "proxiable", krb5_config_string, check_boolean },
{ "ticket_lifetime", krb5_config_string, check_time },
{ "renew_lifetime", krb5_config_string, check_time },
{ "no-addresses", krb5_config_string, check_boolean },
{ "krb4_get_tickets", krb5_config_string, check_boolean },
{ "pkinit_anchors", krb5_config_string, NULL },
{ "pkinit_win2k", krb5_config_string, NULL },
{ "pkinit_win2k_require_binding", krb5_config_string, NULL },
{ "pkinit_require_eku", krb5_config_string, NULL },
{ "pkinit_require_krbtgt_otherName", krb5_config_string, NULL },
{ "pkinit_require_hostname_match", krb5_config_string, NULL },
#if 0
{ "anonymous", krb5_config_string, check_boolean },
#endif
{ "", krb5_config_list, appdefaults_entries },
{ NULL }
};
struct entry realms_entries[] = {
{ "forwardable", krb5_config_string, check_boolean },
{ "proxiable", krb5_config_string, check_boolean },
{ "ticket_lifetime", krb5_config_string, check_time },
{ "renew_lifetime", krb5_config_string, check_time },
{ "warn_pwexpire", krb5_config_string, check_time },
{ "kdc", krb5_config_string, check_host },
{ "admin_server", krb5_config_string, check_host },
{ "kpasswd_server", krb5_config_string, check_host },
{ "krb524_server", krb5_config_string, check_host },
{ "v4_name_convert", krb5_config_list, v4_name_convert_entries },
{ "v4_instance_convert", krb5_config_list, all_strings },
{ "v4_domains", krb5_config_string, NULL },
{ "default_domain", krb5_config_string, NULL },
{ "win2k_pkinit", krb5_config_string, NULL },
/* MIT stuff */
{ "admin_keytab", krb5_config_string, mit_entry },
{ "acl_file", krb5_config_string, mit_entry },
{ "dict_file", krb5_config_string, mit_entry },
{ "kadmind_port", krb5_config_string, mit_entry },
{ "kpasswd_port", krb5_config_string, mit_entry },
{ "master_key_name", krb5_config_string, mit_entry },
{ "master_key_type", krb5_config_string, mit_entry },
{ "key_stash_file", krb5_config_string, mit_entry },
{ "max_life", krb5_config_string, mit_entry },
{ "max_renewable_life", krb5_config_string, mit_entry },
{ "default_principal_expiration", krb5_config_string, mit_entry },
{ "default_principal_flags", krb5_config_string, mit_entry },
{ "supported_enctypes", krb5_config_string, mit_entry },
{ "database_name", krb5_config_string, mit_entry },
{ NULL }
};
struct entry realms_foobar[] = {
{ "", krb5_config_list, realms_entries },
{ NULL }
};
struct entry kdc_database_entries[] = {
{ "realm", krb5_config_string, NULL },
{ "dbname", krb5_config_string, NULL },
{ "mkey_file", krb5_config_string, NULL },
{ "acl_file", krb5_config_string, NULL },
{ "log_file", krb5_config_string, NULL },
{ NULL }
};
struct entry kdc_entries[] = {
{ "database", krb5_config_list, kdc_database_entries },
{ "key-file", krb5_config_string, NULL },
{ "logging", krb5_config_string, check_log },
{ "max-request", krb5_config_string, check_bytes },
{ "require-preauth", krb5_config_string, check_boolean },
{ "ports", krb5_config_string, NULL },
{ "addresses", krb5_config_string, NULL },
{ "enable-kerberos4", krb5_config_string, check_boolean },
{ "enable-524", krb5_config_string, check_boolean },
{ "enable-http", krb5_config_string, check_boolean },
{ "check-ticket-addresses", krb5_config_string, check_boolean },
{ "allow-null-ticket-addresses", krb5_config_string, check_boolean },
{ "allow-anonymous", krb5_config_string, check_boolean },
{ "v4_realm", krb5_config_string, NULL },
{ "enable-kaserver", krb5_config_string, check_boolean },
{ "encode_as_rep_as_tgs_rep", krb5_config_string, check_boolean },
{ "kdc_warn_pwexpire", krb5_config_string, check_time },
{ "use_2b", krb5_config_list, NULL },
{ "enable-pkinit", krb5_config_string, check_boolean },
{ "pkinit_identity", krb5_config_string, NULL },
{ "pkinit_anchors", krb5_config_string, NULL },
{ "pkinit_pool", krb5_config_string, NULL },
{ "pkinit_revoke", krb5_config_string, NULL },
{ "pkinit_kdc_ocsp", krb5_config_string, NULL },
{ "pkinit_principal_in_certificate", krb5_config_string, NULL },
{ "pkinit_dh_min_bits", krb5_config_string, NULL },
{ "pkinit_allow_proxy_certificate", krb5_config_string, NULL },
{ "hdb-ldap-create-base", krb5_config_string, NULL },
{ "v4-realm", krb5_config_string, NULL },
{ NULL }
};
struct entry kadmin_entries[] = {
{ "password_lifetime", krb5_config_string, check_time },
{ "default_keys", krb5_config_string, NULL },
{ "use_v4_salt", krb5_config_string, NULL },
{ "require-preauth", krb5_config_string, check_boolean },
{ NULL }
};
struct entry log_strings[] = {
{ "", krb5_config_string, check_log },
{ NULL }
};
/* MIT stuff */
struct entry kdcdefaults_entries[] = {
{ "kdc_ports", krb5_config_string, mit_entry },
{ "v4_mode", krb5_config_string, mit_entry },
{ NULL }
};
struct entry capaths_entries[] = {
{ "", krb5_config_list, all_strings },
{ NULL }
};
struct entry password_quality_entries[] = {
{ "policies", krb5_config_string, NULL },
{ "external_program", krb5_config_string, NULL },
{ "min_classes", krb5_config_string, check_numeric },
{ "min_length", krb5_config_string, check_numeric },
{ "", krb5_config_list, all_strings },
{ NULL }
};
struct entry toplevel_sections[] = {
{ "libdefaults" , krb5_config_list, libdefaults_entries },
{ "realms", krb5_config_list, realms_foobar },
{ "domain_realm", krb5_config_list, all_strings },
{ "logging", krb5_config_list, log_strings },
{ "kdc", krb5_config_list, kdc_entries },
{ "kadmin", krb5_config_list, kadmin_entries },
{ "appdefaults", krb5_config_list, appdefaults_entries },
{ "gssapi", krb5_config_list, NULL },
{ "capaths", krb5_config_list, capaths_entries },
{ "password_quality", krb5_config_list, password_quality_entries },
/* MIT stuff */
{ "kdcdefaults", krb5_config_list, kdcdefaults_entries },
{ NULL }
};
static int
check_section(krb5_context context, const char *path, krb5_config_section *cf,
struct entry *entries)
{
int error = 0;
krb5_config_section *p;
struct entry *e;
char *local;
for(p = cf; p != NULL; p = p->next) {
asprintf(&local, "%s/%s", path, p->name);
for(e = entries; e->name != NULL; e++) {
if(*e->name == '\0' || strcmp(e->name, p->name) == 0) {
if(e->type != p->type) {
krb5_warnx(context, "%s: unknown or wrong type", local);
error |= 1;
} else if(p->type == krb5_config_string && e->check_data != NULL) {
error |= (*(check_func_t)e->check_data)(context, local, p->u.string);
} else if(p->type == krb5_config_list && e->check_data != NULL) {
error |= check_section(context, local, p->u.list, e->check_data);
}
break;
}
}
if(e->name == NULL) {
krb5_warnx(context, "%s: unknown entry", local);
error |= 1;
}
free(local);
}
return error;
}
static void
dumpconfig(int level, krb5_config_section *top)
{
krb5_config_section *x;
for(x = top; x; x = x->next) {
switch(x->type) {
case krb5_config_list:
if(level == 0) {
printf("[%s]\n", x->name);
} else {
printf("%*s%s = {\n", 4 * level, " ", x->name);
}
dumpconfig(level + 1, x->u.list);
if(level > 0)
printf("%*s}\n", 4 * level, " ");
break;
case krb5_config_string:
printf("%*s%s = %s\n", 4 * level, " ", x->name, x->u.string);
break;
}
}
}
int
main(int argc, char **argv)
{
krb5_context context;
krb5_error_code ret;
krb5_config_section *tmp_cf;
int optidx = 0;
setprogname (argv[0]);
ret = krb5_init_context(&context);
if (ret == KRB5_CONFIG_BADFORMAT)
errx (1, "krb5_init_context failed to parse configuration file");
else if (ret)
errx (1, "krb5_init_context failed with %d", ret);
if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
usage(1);
if (help_flag)
usage (0);
if(version_flag){
print_version(NULL);
exit(0);
}
argc -= optidx;
argv += optidx;
tmp_cf = NULL;
if(argc == 0)
krb5_get_default_config_files(&argv);
while(*argv) {
ret = krb5_config_parse_file_multi(context, *argv, &tmp_cf);
if (ret != 0)
krb5_warn (context, ret, "krb5_config_parse_file");
argv++;
}
if(dumpconfig_flag)
dumpconfig(0, tmp_cf);
return check_section(context, "", tmp_cf, toplevel_sections);
}