isa/sudo
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
c05fe93669e60dba1e290d448254503bd84c8ca3
sudo/logsrvd/logsrvd_conf.c

1144 lines
28 KiB
C
Raw Blame History

/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2019-2020 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "config.h"
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
#include <ctype.h>
#include <fcntl.h>
#include <limits.h>
#include <netdb.h>
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include "compat/stdbool.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <grp.h>
#include <pwd.h>
#ifndef HAVE_GETADDRINFO
# include "compat/getaddrinfo.h"
#endif
#include "pathnames.h"
#include "sudo_compat.h"
#include "sudo_debug.h"
#include "sudo_eventlog.h"
#include "sudo_fatal.h"
#include "sudo_gettext.h"
#include "sudo_iolog.h"
#include "sudo_util.h"
#include "log_server.pb-c.h"
#include "logsrvd.h"
#if defined(HAVE_OPENSSL)
# define DEFAULT_CA_CERT_PATH "/etc/ssl/sudo/cacert.pem"
# define DEFAULT_SERVER_CERT_PATH "/etc/ssl/sudo/certs/logsrvd_cert.pem"
# define DEFAULT_SERVER_KEY_PATH "/etc/ssl/sudo/private/logsrvd_key.pem"
#endif
struct logsrvd_config;
typedef bool (*logsrvd_conf_cb_t)(struct logsrvd_config *config, const char *);
struct logsrvd_config_entry {
char *conf_str;
logsrvd_conf_cb_t setter;
};
struct logsrvd_config_section {
char *name;
struct logsrvd_config_entry *entries;
};
static struct logsrvd_config {
struct logsrvd_config_server {
struct listen_address_list addresses;
struct timespec timeout;
bool tcp_keepalive;
char *pid_file;
#if defined(HAVE_OPENSSL)
bool tls;
struct logsrvd_tls_config tls_config;
struct logsrvd_tls_runtime tls_runtime;
#endif
} server;
struct logsrvd_config_iolog {
bool compress;
bool flush;
bool gid_set;
uid_t uid;
gid_t gid;
mode_t mode;
unsigned int maxseq;
char *iolog_dir;
char *iolog_file;
} iolog;
struct logsrvd_config_eventlog {
int log_type;
enum eventlog_format log_format;
} eventlog;
struct logsrvd_config_syslog {
unsigned int maxlen;
int facility;
int acceptpri;
int rejectpri;
int alertpri;
} syslog;
struct logsrvd_config_logfile {
char *path;
char *time_format;
FILE *stream;
} logfile;
} *logsrvd_config;
/* iolog getters */
mode_t
logsrvd_conf_iolog_mode(void)
{
return logsrvd_config->iolog.mode;
}
const char *
logsrvd_conf_iolog_dir(void)
{
return logsrvd_config->iolog.iolog_dir;
}
const char *
logsrvd_conf_iolog_file(void)
{
return logsrvd_config->iolog.iolog_file;
}
/* server getters */
struct listen_address_list *
logsrvd_conf_listen_address(void)
{
return &logsrvd_config->server.addresses;
}
bool
logsrvd_conf_tcp_keepalive(void)
{
return logsrvd_config->server.tcp_keepalive;
}
const char *
logsrvd_conf_pid_file(void)
{
return logsrvd_config->server.pid_file;
}
struct timespec *
logsrvd_conf_get_sock_timeout(void)
{
if (sudo_timespecisset(&logsrvd_config->server.timeout)) {
return &(logsrvd_config->server.timeout);
}
return NULL;
}
#if defined(HAVE_OPENSSL)
const struct logsrvd_tls_config *
logsrvd_get_tls_config(void)
{
return &logsrvd_config->server.tls_config;
}
struct logsrvd_tls_runtime *
logsrvd_get_tls_runtime(void)
{
return &logsrvd_config->server.tls_runtime;
}
#endif
/* I/O log callbacks */
static bool
cb_iolog_dir(struct logsrvd_config *config, const char *path)
{
debug_decl(cb_iolog_dir, SUDO_DEBUG_UTIL);
free(config->iolog.iolog_dir);
if ((config->iolog.iolog_dir = strdup(path)) == NULL) {
sudo_warn(NULL);
debug_return_bool(false);
}
debug_return_bool(true);
}
static bool
cb_iolog_file(struct logsrvd_config *config, const char *path)
{
debug_decl(cb_iolog_file, SUDO_DEBUG_UTIL);
free(config->iolog.iolog_file);
if ((config->iolog.iolog_file = strdup(path)) == NULL) {
sudo_warn(NULL);
debug_return_bool(false);
}
debug_return_bool(true);
}
static bool
cb_iolog_compress(struct logsrvd_config *config, const char *str)
{
int val;
debug_decl(cb_iolog_compress, SUDO_DEBUG_UTIL);
if ((val = sudo_strtobool(str)) == -1)
debug_return_bool(false);
config->iolog.compress = val;
debug_return_bool(true);
}
static bool
cb_iolog_flush(struct logsrvd_config *config, const char *str)
{
int val;
debug_decl(cb_iolog_flush, SUDO_DEBUG_UTIL);
if ((val = sudo_strtobool(str)) == -1)
debug_return_bool(false);
config->iolog.flush = val;
debug_return_bool(true);
}
static bool
cb_iolog_user(struct logsrvd_config *config, const char *user)
{
struct passwd *pw;
debug_decl(cb_iolog_user, SUDO_DEBUG_UTIL);
if ((pw = getpwnam(user)) == NULL) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"unknown user %s", user);
debug_return_bool(false);
}
config->iolog.uid = pw->pw_uid;
if (!config->iolog.gid_set)
config->iolog.gid = pw->pw_gid;
debug_return_bool(true);
}
static bool
cb_iolog_group(struct logsrvd_config *config, const char *group)
{
struct group *gr;
debug_decl(cb_iolog_group, SUDO_DEBUG_UTIL);
if ((gr = getgrnam(group)) == NULL) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"unknown group %s", group);
debug_return_bool(false);
}
config->iolog.gid = gr->gr_gid;
config->iolog.gid_set = true;
debug_return_bool(true);
}
static bool
cb_iolog_mode(struct logsrvd_config *config, const char *str)
{
const char *errstr;
mode_t mode;
debug_decl(cb_iolog_mode, SUDO_DEBUG_UTIL);
mode = sudo_strtomode(str, &errstr);
if (errstr != NULL) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"unable to parse iolog mode %s", str);
debug_return_bool(false);
}
config->iolog.mode = mode;
debug_return_bool(true);
}
static bool
cb_iolog_maxseq(struct logsrvd_config *config, const char *str)
{
const char *errstr;
unsigned int value;
debug_decl(cb_iolog_maxseq, SUDO_DEBUG_UTIL);
value = sudo_strtonum(str, 0, SESSID_MAX, &errstr);
if (errstr != NULL) {
if (errno != ERANGE) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"bad maxseq: %s: %s", str, errstr);
debug_return_bool(false);
}
/* Out of range, clamp to SESSID_MAX as documented. */
value = SESSID_MAX;
}
config->iolog.maxseq = value;
debug_return_bool(true);
}
/* Server callbacks */
static bool
cb_listen_address(struct logsrvd_config *config, const char *str)
{
struct addrinfo hints, *res, *res0 = NULL;
char *copy, *host, *port;
bool tls, ret = false;
int error;
debug_decl(cb_iolog_mode, SUDO_DEBUG_UTIL);
if ((copy = strdup(str)) == NULL) {
sudo_warn(NULL);
debug_return_bool(false);
}
/* Parse host[:port] */
if (!iolog_parse_host_port(copy, &host, &port, &tls, DEFAULT_PORT,
DEFAULT_PORT_TLS))
goto done;
if (host[0] == '*' && host[1] == '\0')
host = NULL;
#if !defined(HAVE_OPENSSL)
if (tls) {
sudo_warnx("%s", U_("TLS not supported"));
goto done;
}
#endif
/* Resolve host (and port if it is a service). */
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
error = getaddrinfo(host, port, &hints, &res0);
if (error != 0) {
sudo_gai_warn(error, U_("%s:%s"), host ? host : "*", port);
goto done;
}
for (res = res0; res != NULL; res = res->ai_next) {
struct listen_address *addr;
if ((addr = malloc(sizeof(*addr))) == NULL) {
sudo_warn(NULL);
goto done;
}
if ((addr->sa_str = strdup(str)) == NULL) {
sudo_warn(NULL);
free(addr);
goto done;
}
memcpy(&addr->sa_un, res->ai_addr, res->ai_addrlen);
addr->sa_size = res->ai_addrlen;
addr->tls = tls;
TAILQ_INSERT_TAIL(&config->server.addresses, addr, entries);
}
ret = true;
done:
if (res0 != NULL)
freeaddrinfo(res0);
free(copy);
debug_return_bool(ret);
}
static bool
cb_timeout(struct logsrvd_config *config, const char *str)
{
int timeout;
const char* errstr;
debug_decl(cb_timeout, SUDO_DEBUG_UTIL);
timeout = sudo_strtonum(str, 0, UINT_MAX, &errstr);
if (errstr != NULL)
debug_return_bool(false);
config->server.timeout.tv_sec = timeout;
debug_return_bool(true);
}
static bool
cb_keepalive(struct logsrvd_config *config, const char *str)
{
int val;
debug_decl(cb_keepalive, SUDO_DEBUG_UTIL);
if ((val = sudo_strtobool(str)) == -1)
debug_return_bool(false);
config->server.tcp_keepalive = val;
debug_return_bool(true);
}
static bool
cb_pid_file(struct logsrvd_config *config, const char *str)
{
char *copy = NULL;
debug_decl(cb_pid_file, SUDO_DEBUG_UTIL);
/* An empty value means to disable the pid file. */
if (*str != '\0') {
if (*str != '/') {
sudo_warnx(U_("%s: not a fully qualified path"), str);
debug_return_bool(false);
}
if ((copy = strdup(str)) == NULL) {
sudo_warn(NULL);
debug_return_bool(false);
}
}
free(config->server.pid_file);
config->server.pid_file = copy;
debug_return_bool(true);
}
#if defined(HAVE_OPENSSL)
static bool
cb_tls_key(struct logsrvd_config *config, const char *path)
{
debug_decl(cb_tls_key, SUDO_DEBUG_UTIL);
free(config->server.tls_config.pkey_path);
if ((config->server.tls_config.pkey_path = strdup(path)) == NULL) {
sudo_warn(NULL);
debug_return_bool(false);
}
debug_return_bool(true);
}
static bool
cb_tls_cacert(struct logsrvd_config *config, const char *path)
{
debug_decl(cb_tls_cacert, SUDO_DEBUG_UTIL);
free(config->server.tls_config.cacert_path);
if ((config->server.tls_config.cacert_path = strdup(path)) == NULL) {
sudo_warn(NULL);
debug_return_bool(false);
}
debug_return_bool(true);
}
static bool
cb_tls_cert(struct logsrvd_config *config, const char *path)
{
debug_decl(cb_tls_cert, SUDO_DEBUG_UTIL);
free(config->server.tls_config.cert_path);
if ((config->server.tls_config.cert_path = strdup(path)) == NULL) {
sudo_warn(NULL);
debug_return_bool(false);
}
debug_return_bool(true);
}
static bool
cb_tls_dhparam(struct logsrvd_config *config, const char *path)
{
debug_decl(cb_tls_dhparam, SUDO_DEBUG_UTIL);
free(config->server.tls_config.dhparams_path);
if ((config->server.tls_config.dhparams_path = strdup(path)) == NULL) {
sudo_warn(NULL);
debug_return_bool(false);
}
debug_return_bool(true);
}
static bool
cb_tls_ciphers12(struct logsrvd_config *config, const char *str)
{
debug_decl(cb_tls_ciphers12, SUDO_DEBUG_UTIL);
free(config->server.tls_config.ciphers_v12);
if ((config->server.tls_config.ciphers_v12 = strdup(str)) == NULL) {
sudo_warn(NULL);
debug_return_bool(false);
}
debug_return_bool(true);
}
static bool
cb_tls_ciphers13(struct logsrvd_config *config, const char *str)
{
debug_decl(cb_tls_ciphers13, SUDO_DEBUG_UTIL);
free(config->server.tls_config.ciphers_v13);
if ((config->server.tls_config.ciphers_v13 = strdup(str)) == NULL) {
sudo_warn(NULL);
debug_return_bool(false);
}
debug_return_bool(true);
}
static bool
cb_tls_verify(struct logsrvd_config *config, const char *str)
{
int val;
debug_decl(cb_tls_verify, SUDO_DEBUG_UTIL);
if ((val = sudo_strtobool(str)) == -1)
debug_return_bool(false);
config->server.tls_config.verify = val;
debug_return_bool(true);
}
static bool
cb_tls_checkpeer(struct logsrvd_config *config, const char *str)
{
int val;
debug_decl(cb_tls_checkpeer, SUDO_DEBUG_UTIL);
if ((val = sudo_strtobool(str)) == -1)
debug_return_bool(false);
config->server.tls_config.check_peer = val;
debug_return_bool(true);
}
#endif
/* eventlog callbacks */
static bool
cb_eventlog_type(struct logsrvd_config *config, const char *str)
{
debug_decl(cb_eventlog_type, SUDO_DEBUG_UTIL);
if (strcmp(str, "none") == 0)
config->eventlog.log_type = EVLOG_NONE;
else if (strcmp(str, "syslog") == 0)
config->eventlog.log_type = EVLOG_SYSLOG;
else if (strcmp(str, "logfile") == 0)
config->eventlog.log_type = EVLOG_FILE;
else
debug_return_bool(false);
debug_return_bool(true);
}
static bool
cb_eventlog_format(struct logsrvd_config *config, const char *str)
{
debug_decl(cb_eventlog_format, SUDO_DEBUG_UTIL);
if (strcmp(str, "json") == 0)
config->eventlog.log_format = EVLOG_JSON;
else if (strcmp(str, "sudo") == 0)
config->eventlog.log_format = EVLOG_SUDO;
else
debug_return_bool(false);
debug_return_bool(true);
}
/* syslog callbacks */
static bool
cb_syslog_maxlen(struct logsrvd_config *config, const char *str)
{
unsigned int maxlen;
const char *errstr;
debug_decl(cb_syslog_maxlen, SUDO_DEBUG_UTIL);
maxlen = sudo_strtonum(str, 1, UINT_MAX, &errstr);
if (errstr != NULL)
debug_return_bool(false);
config->syslog.maxlen = maxlen;
debug_return_bool(true);
}
static bool
cb_syslog_facility(struct logsrvd_config *config, const char *str)
{
int logfac;
debug_decl(cb_syslog_facility, SUDO_DEBUG_UTIL);
if (!sudo_str2logfac(str, &logfac)) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"invalid syslog priority %s", str);
debug_return_bool(false);
}
config->syslog.facility = logfac;
debug_return_bool(true);
}
static bool
cb_syslog_acceptpri(struct logsrvd_config *config, const char *str)
{
int logpri;
debug_decl(cb_syslog_acceptpri, SUDO_DEBUG_UTIL);
if (!sudo_str2logpri(str, &logpri)) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"invalid syslog priority %s", str);
debug_return_bool(false);
}
config->syslog.acceptpri = logpri;
debug_return_bool(true);
}
static bool
cb_syslog_rejectpri(struct logsrvd_config *config, const char *str)
{
int logpri;
debug_decl(cb_syslog_rejectpri, SUDO_DEBUG_UTIL);
if (!sudo_str2logpri(str, &logpri))
debug_return_bool(false);
config->syslog.rejectpri = logpri;
debug_return_bool(true);
}
static bool
cb_syslog_alertpri(struct logsrvd_config *config, const char *str)
{
int logpri;
debug_decl(cb_syslog_alertpri, SUDO_DEBUG_UTIL);
if (!sudo_str2logpri(str, &logpri)) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"invalid syslog priority %s", str);
debug_return_bool(false);
}
config->syslog.alertpri = logpri;
debug_return_bool(true);
}
/* logfile callbacks */
static bool
cb_logfile_path(struct logsrvd_config *config, const char *str)
{
char *copy = NULL;
debug_decl(cb_logfile_path, SUDO_DEBUG_UTIL);
if (*str != '/') {
debug_return_bool(false);
sudo_warnx(U_("%s: not a fully qualified path"), str);
debug_return_bool(false);
}
if ((copy = strdup(str)) == NULL) {
sudo_warn(NULL);
debug_return_bool(false);
}
free(config->logfile.path);
config->logfile.path = copy;
debug_return_bool(true);
}
static bool
cb_logfile_time_format(struct logsrvd_config *config, const char *str)
{
char *copy = NULL;
debug_decl(cb_logfile_time_format, SUDO_DEBUG_UTIL);
if ((copy = strdup(str)) == NULL) {
sudo_warn(NULL);
debug_return_bool(false);
}
free(config->logfile.time_format);
config->logfile.time_format = copy;
debug_return_bool(true);
}
static struct logsrvd_config_entry server_conf_entries[] = {
{ "listen_address", cb_listen_address },
{ "timeout", cb_timeout },
{ "tcp_keepalive", cb_keepalive },
{ "pid_file", cb_pid_file },
#if defined(HAVE_OPENSSL)
{ "tls_key", cb_tls_key },
{ "tls_cacert", cb_tls_cacert },
{ "tls_cert", cb_tls_cert },
{ "tls_dhparams", cb_tls_dhparam },
{ "tls_ciphers_v12", cb_tls_ciphers12 },
{ "tls_ciphers_v13", cb_tls_ciphers13 },
{ "tls_checkpeer", cb_tls_checkpeer },
{ "tls_verify", cb_tls_verify },
#endif
{ NULL }
};
static struct logsrvd_config_entry iolog_conf_entries[] = {
{ "iolog_dir", cb_iolog_dir },
{ "iolog_file", cb_iolog_file },
{ "iolog_flush", cb_iolog_flush },
{ "iolog_compress", cb_iolog_compress },
{ "iolog_user", cb_iolog_user },
{ "iolog_group", cb_iolog_group },
{ "iolog_mode", cb_iolog_mode },
{ "maxseq", cb_iolog_maxseq },
{ NULL }
};
static struct logsrvd_config_entry eventlog_conf_entries[] = {
{ "log_type", cb_eventlog_type },
{ "log_format", cb_eventlog_format },
{ NULL }
};
static struct logsrvd_config_entry syslog_conf_entries[] = {
{ "maxlen", cb_syslog_maxlen },
{ "facility", cb_syslog_facility },
{ "reject_priority", cb_syslog_rejectpri },
{ "accept_priority", cb_syslog_acceptpri },
{ "alert_priority", cb_syslog_alertpri },
{ NULL }
};
static struct logsrvd_config_entry logfile_conf_entries[] = {
{ "path", cb_logfile_path },
{ "time_format", cb_logfile_time_format },
{ NULL }
};
static struct logsrvd_config_section logsrvd_config_sections[] = {
{ "server", server_conf_entries },
{ "iolog", iolog_conf_entries },
{ "eventlog", eventlog_conf_entries },
{ "syslog", syslog_conf_entries },
{ "logfile", logfile_conf_entries },
{ NULL }
};
static bool
logsrvd_conf_parse(struct logsrvd_config *config, FILE *fp, const char *path)
{
struct logsrvd_config_section *conf_section = NULL;
unsigned int lineno = 0;
size_t linesize = 0;
char *line = NULL;
bool ret = false;
debug_decl(logsrvd_conf_parse, SUDO_DEBUG_UTIL);
while (sudo_parseln(&line, &linesize, &lineno, fp, 0) != -1) {
struct logsrvd_config_entry *entry;
char *ep, *val;
/* Skip blank, comment or invalid lines. */
if (*line == '\0' || *line == ';')
continue;
/* New section */
if (line[0] == '[') {
char *section_name = line + 1;
char *cp = strchr(section_name, ']');
if (cp == NULL) {
sudo_warnx(U_("%s:%d unmatched '[': %s"),
path, lineno, line);
goto done;
}
*cp = '\0';
for (conf_section = logsrvd_config_sections; conf_section->name != NULL;
conf_section++) {
if (strcasecmp(section_name, conf_section->name) == 0)
break;
}
if (conf_section->name == NULL) {
sudo_warnx(U_("%s:%d invalid config section: %s"),
path, lineno, section_name);
goto done;
}
continue;
}
if ((ep = strchr(line, '=')) == NULL) {
sudo_warnx(U_("%s:%d invalid configuration line: %s"),
path, lineno, line);
goto done;
}
if (conf_section == NULL) {
sudo_warnx(U_("%s:%d expected section name: %s"),
path, lineno, line);
goto done;
}
val = ep + 1;
while (isspace((unsigned char)*val))
val++;
while (ep > line && isspace((unsigned char)ep[-1]))
ep--;
*ep = '\0';
for (entry = conf_section->entries; entry->conf_str != NULL; entry++) {
if (strcasecmp(line, entry->conf_str) == 0) {
if (!entry->setter(config, val)) {
sudo_warnx(U_("invalid value for %s: %s"),
entry->conf_str, val);
goto done;
}
break;
}
}
if (entry->conf_str == NULL) {
sudo_warnx(U_("%s:%d unknown key: %s"), path, lineno, line);
goto done;
}
}
ret = true;
done:
free(line);
debug_return_bool(ret);
}
static FILE *
logsrvd_open_eventlog(struct logsrvd_config *config)
{
mode_t oldmask;
FILE *fp = NULL;
const char *omode;
int fd, flags;
debug_decl(logsrvd_open_eventlog, SUDO_DEBUG_UTIL);
/* Cannot append to a JSON file. */
if (config->eventlog.log_format == EVLOG_JSON) {
flags = O_RDWR|O_CREAT;
omode = "w";
} else {
flags = O_WRONLY|O_APPEND|O_CREAT;
omode = "a";
}
oldmask = umask(S_IRWXG|S_IRWXO);
fd = open(config->logfile.path, flags, S_IRUSR|S_IWUSR);
(void)umask(oldmask);
if (fd == -1 || (fp = fdopen(fd, omode)) == NULL) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO|SUDO_DEBUG_ERRNO,
"unable to open log file %s", config->logfile.path);
if (fd != -1)
close(fd);
}
debug_return_ptr(fp);
}
static FILE *
logsrvd_stub_open_log(int type, const char *logfile)
{
/* Actual open already done by logsrvd_open_eventlog() */
return logsrvd_config->logfile.stream;
}
static void
logsrvd_stub_close_log(int type, FILE *fp)
{
return;
}
/* Set eventlog configuration settings from on logsrvd config. */
static void
logsrvd_conf_eventlog_setconf(struct logsrvd_config *config)
{
debug_decl(logsrvd_conf_eventlog_setconf, SUDO_DEBUG_UTIL);
eventlog_set_type(config->eventlog.log_type);
eventlog_set_format(config->eventlog.log_format);
eventlog_set_syslog_acceptpri(config->syslog.acceptpri);
eventlog_set_syslog_rejectpri(config->syslog.rejectpri);
eventlog_set_syslog_alertpri(config->syslog.alertpri);
eventlog_set_syslog_maxlen(config->syslog.maxlen);
eventlog_set_logpath(config->logfile.path);
eventlog_set_time_fmt(config->logfile.time_format);
eventlog_set_open_log(logsrvd_stub_open_log);
eventlog_set_close_log(logsrvd_stub_close_log);
debug_return;
}
/* Free the specified struct logsrvd_config and its contents. */
void
logsrvd_conf_free(struct logsrvd_config *config)
{
struct listen_address *addr;
debug_decl(logsrvd_conf_free, SUDO_DEBUG_UTIL);
if (config == NULL)
debug_return;
/* struct logsrvd_config_server */
while ((addr = TAILQ_FIRST(&config->server.addresses))) {
TAILQ_REMOVE(&config->server.addresses, addr, entries);
free(addr->sa_str);
free(addr);
}
free(config->server.pid_file);
/* struct logsrvd_config_iolog */
free(config->iolog.iolog_dir);
free(config->iolog.iolog_file);
/* struct logsrvd_config_logfile */
free(config->logfile.path);
free(config->logfile.time_format);
if (config->logfile.stream != NULL)
fclose(config->logfile.stream);
#if defined(HAVE_OPENSSL)
free(config->server.tls_config.pkey_path);
free(config->server.tls_config.cert_path);
free(config->server.tls_config.cacert_path);
free(config->server.tls_config.dhparams_path);
free(config->server.tls_config.ciphers_v12);
free(config->server.tls_config.ciphers_v13);
if (config->server.tls_runtime.ssl_ctx != NULL)
SSL_CTX_free(config->server.tls_runtime.ssl_ctx);
#endif
free(config);
debug_return;
}
/* Allocate a new struct logsrvd_config and set default values. */
struct logsrvd_config *
logsrvd_conf_alloc(void)
{
struct logsrvd_config *config;
debug_decl(logsrvd_conf_alloc, SUDO_DEBUG_UTIL);
if ((config = calloc(1, sizeof(*config))) == NULL) {
sudo_warn(NULL);
debug_return_ptr(NULL);
}
/* Server defaults */
TAILQ_INIT(&config->server.addresses);
config->server.timeout.tv_sec = DEFAULT_SOCKET_TIMEOUT_SEC;
config->server.tcp_keepalive = true;
config->server.pid_file = strdup(_PATH_SUDO_LOGSRVD_PID);
if (config->server.pid_file == NULL) {
sudo_warn(NULL);
goto bad;
}
#if defined(HAVE_OPENSSL)
/*
* Only set default CA and cert paths if the files actually exist.
* This ensures we don't enable TLS by default when it is not configured.
*/
if (access(DEFAULT_CA_CERT_PATH, R_OK) == 0) {
config->server.tls_config.cacert_path = strdup(DEFAULT_CA_CERT_PATH);
if (config->server.tls_config.cacert_path == NULL) {
sudo_warn(NULL);
goto bad;
}
}
if (access(DEFAULT_SERVER_CERT_PATH, R_OK) == 0) {
config->server.tls_config.cert_path = strdup(DEFAULT_SERVER_CERT_PATH);
if (config->server.tls_config.cert_path == NULL) {
sudo_warn(NULL);
goto bad;
}
}
config->server.tls_config.pkey_path = strdup(DEFAULT_SERVER_KEY_PATH);
if (config->server.tls_config.pkey_path == NULL) {
sudo_warn(NULL);
goto bad;
}
config->server.tls_config.verify = true;
config->server.tls_config.check_peer = false;
#endif
/* I/O log defaults */
config->iolog.compress = false;
config->iolog.flush = true;
config->iolog.mode = S_IRUSR|S_IWUSR;
config->iolog.maxseq = SESSID_MAX;
if (!cb_iolog_dir(config, _PATH_SUDO_IO_LOGDIR))
goto bad;
if (!cb_iolog_file(config, "%{seq}"))
goto bad;
config->iolog.uid = ROOT_UID;
config->iolog.gid = ROOT_GID;
config->iolog.gid_set = false;
/* Event log defaults */
config->eventlog.log_type = EVLOG_SYSLOG;
config->eventlog.log_format = EVLOG_SUDO;
/* Syslog defaults */
config->syslog.maxlen = 960;
if (!cb_syslog_facility(config, LOGFAC)) {
sudo_warnx(U_("unknown syslog facility %s"), LOGFAC);
goto bad;
}
if (!cb_syslog_acceptpri(config, PRI_SUCCESS)) {
sudo_warnx(U_("unknown syslog priority %s"), PRI_SUCCESS);
goto bad;
}
if (!cb_syslog_rejectpri(config, PRI_FAILURE)) {
sudo_warnx(U_("unknown syslog priority %s"), PRI_FAILURE);
goto bad;
}
if (!cb_syslog_alertpri(config, PRI_FAILURE)) {
sudo_warnx(U_("unknown syslog priority %s"), PRI_FAILURE);
goto bad;
}
/* Log file defaults */
if (!cb_logfile_time_format(config, "%h %e %T"))
goto bad;
if (!cb_logfile_path(config, _PATH_SUDO_LOGFILE))
goto bad;
debug_return_ptr(config);
bad:
logsrvd_conf_free(config);
debug_return_ptr(NULL);
}
bool
logsrvd_conf_apply(struct logsrvd_config *config)
{
debug_decl(logsrvd_conf_apply, SUDO_DEBUG_UTIL);
/* There can be multiple addresses so we can't set a default earlier. */
if (TAILQ_EMPTY(&config->server.addresses)) {
/* Enable plaintext listender. */
if (!cb_listen_address(config, "*:" DEFAULT_PORT))
debug_return_bool(false);
#if defined(HAVE_OPENSSL)
/* If a certificate was specified, enable the TLS listener too. */
if (config->server.tls_config.cert_path != NULL) {
if (!cb_listen_address(config, "*:" DEFAULT_PORT_TLS "(tls)"))
debug_return_bool(false);
}
} else {
struct listen_address *addr;
/* Check that TLS configuration is valid. */
TAILQ_FOREACH(addr, &config->server.addresses, entries) {
if (!addr->tls)
continue;
/*
* If a TLS listener was explicitly enabled but the cert path
* was not, use the default.
*/
if (config->server.tls_config.cert_path == NULL) {
config->server.tls_config.cert_path =
strdup(DEFAULT_SERVER_CERT_PATH);
if (config->server.tls_config.cert_path == NULL) {
sudo_warn(NULL);
debug_return_bool(false);
}
}
break;
}
#endif
}
/* Open event log if specified. */
switch (config->eventlog.log_type) {
case EVLOG_SYSLOG:
openlog("sudo", 0, config->syslog.facility);
break;
case EVLOG_FILE:
config->logfile.stream = logsrvd_open_eventlog(config);
if (config->logfile.stream == NULL)
debug_return_bool(false);
break;
case EVLOG_NONE:
break;
default:
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"cannot open unknown log type %d", config->eventlog.log_type);
break;
}
/* Set I/O log library settings */
iolog_set_defaults();
iolog_set_compress(config->iolog.compress);
iolog_set_flush(config->iolog.flush);
iolog_set_owner(config->iolog.uid, config->iolog.gid);
iolog_set_mode(config->iolog.mode);
iolog_set_maxseq(config->iolog.maxseq);
/* Set event log config */
logsrvd_conf_eventlog_setconf(config);
logsrvd_conf_free(logsrvd_config);
logsrvd_config = config;
debug_return_bool(true);
}
/*
* Read .ini style logsrvd.conf file.
* Note that we use '#' not ';' for the comment character.
*/
bool
logsrvd_conf_read(const char *path)
{
struct logsrvd_config *config;
bool ret = false;
FILE *fp = NULL;
debug_decl(logsrvd_conf_read, SUDO_DEBUG_UTIL);
config = logsrvd_conf_alloc();
if ((fp = fopen(path, "r")) == NULL) {
if (errno != ENOENT) {
sudo_warn("%s", path);
goto done;
}
} else {
if (!logsrvd_conf_parse(config, fp, path))
goto done;
}
/* Install new config */
if (logsrvd_conf_apply(config)) {
config = NULL;
ret = true;
}
done:
logsrvd_conf_free(config);
if (fp != NULL)
fclose(fp);
debug_return_bool(ret);
}
Reference in New Issue View Git Blame Copy Permalink