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-rw-r--r--logsrvd/logsrvd_conf.c1907
1 files changed, 1907 insertions, 0 deletions
diff --git a/logsrvd/logsrvd_conf.c b/logsrvd/logsrvd_conf.c
new file mode 100644
index 0000000..1cde0ba
--- /dev/null
+++ b/logsrvd/logsrvd_conf.c
@@ -0,0 +1,1907 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2019-2022 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.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#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 <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <time.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 "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"
+
+/* Evaluates to true if at least one TLS field is set, else false. */
+# define TLS_CONFIGURED(_s) \
+ ((_s).tls_key_path != NULL || (_s).tls_cert_path != NULL || \
+ (_s).tls_cacert_path != NULL || (_s).tls_dhparams_path != NULL || \
+ (_s).tls_ciphers_v12 != NULL || (_s).tls_ciphers_v13 != NULL || \
+ (_s).tls_verify != -1)
+
+/* Evaluates to the relay-specific TLS setting, falling back to server. */
+# define TLS_RELAY_STR(_c, _f) \
+ ((_c)->relay._f != NULL ? (_c)->relay._f : (_c)->server._f)
+
+# define TLS_RELAY_INT(_c, _f) \
+ ((_c)->relay._f != -1 ? (_c)->relay._f : (_c)->server._f)
+#endif
+
+enum server_log_type {
+ SERVER_LOG_NONE,
+ SERVER_LOG_STDERR,
+ SERVER_LOG_SYSLOG,
+ SERVER_LOG_FILE
+};
+
+struct logsrvd_config;
+typedef bool (*logsrvd_conf_cb_t)(struct logsrvd_config *, const char *, size_t);
+
+struct logsrvd_config_entry {
+ const char *conf_str;
+ logsrvd_conf_cb_t setter;
+ size_t offset;
+};
+
+struct logsrvd_config_section {
+ const char *name;
+ struct logsrvd_config_entry *entries;
+};
+
+struct address_list_container {
+ unsigned int refcnt;
+ struct server_address_list addrs;
+};
+
+static struct logsrvd_config {
+ struct logsrvd_config_server {
+ struct address_list_container addresses;
+ struct timespec timeout;
+ bool tcp_keepalive;
+ enum server_log_type log_type;
+ FILE *log_stream;
+ char *log_file;
+ char *pid_file;
+#if defined(HAVE_OPENSSL)
+ char *tls_key_path;
+ char *tls_cert_path;
+ char *tls_cacert_path;
+ char *tls_dhparams_path;
+ char *tls_ciphers_v12;
+ char *tls_ciphers_v13;
+ int tls_check_peer;
+ int tls_verify;
+ SSL_CTX *ssl_ctx;
+#endif
+ } server;
+ struct logsrvd_config_relay {
+ struct address_list_container relays;
+ struct timespec connect_timeout;
+ struct timespec timeout;
+ time_t retry_interval;
+ char *relay_dir;
+ bool tcp_keepalive;
+ bool store_first;
+#if defined(HAVE_OPENSSL)
+ char *tls_key_path;
+ char *tls_cert_path;
+ char *tls_cacert_path;
+ char *tls_dhparams_path;
+ char *tls_ciphers_v12;
+ char *tls_ciphers_v13;
+ int tls_check_peer;
+ int tls_verify;
+ SSL_CTX *ssl_ctx;
+#endif
+ } relay;
+ struct logsrvd_config_iolog {
+ bool compress;
+ bool flush;
+ bool gid_set;
+ bool log_passwords;
+ uid_t uid;
+ gid_t gid;
+ mode_t mode;
+ unsigned int maxseq;
+ char *iolog_dir;
+ char *iolog_file;
+ void *passprompt_regex;
+ } iolog;
+ struct logsrvd_config_eventlog {
+ int log_type;
+ bool log_exit;
+ enum eventlog_format log_format;
+ } eventlog;
+ struct logsrvd_config_syslog {
+ unsigned int maxlen;
+ int server_facility;
+ int facility;
+ int acceptpri;
+ int rejectpri;
+ int alertpri;
+ } syslog;
+ struct logsrvd_config_logfile {
+ char *path;
+ char *time_format;
+ FILE *stream;
+ } logfile;
+} *logsrvd_config;
+
+static bool logsrvd_warn_enable_stderr = true;
+
+/* eventlog getters */
+bool
+logsrvd_conf_log_exit(void)
+{
+ return logsrvd_config->eventlog.log_exit;
+}
+
+/* iolog getters */
+uid_t
+logsrvd_conf_iolog_uid(void)
+{
+ return logsrvd_config->iolog.uid;
+}
+
+gid_t
+logsrvd_conf_iolog_gid(void)
+{
+ return logsrvd_config->iolog.gid;
+}
+
+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;
+}
+
+bool
+logsrvd_conf_iolog_log_passwords(void)
+{
+ return logsrvd_config->iolog.log_passwords;
+}
+
+void *
+logsrvd_conf_iolog_passprompt_regex(void)
+{
+ return logsrvd_config->iolog.passprompt_regex;
+}
+
+/* server getters */
+struct server_address_list *
+logsrvd_conf_server_listen_address(void)
+{
+ return &logsrvd_config->server.addresses.addrs;
+}
+
+bool
+logsrvd_conf_server_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_server_timeout(void)
+{
+ if (sudo_timespecisset(&logsrvd_config->server.timeout)) {
+ return &logsrvd_config->server.timeout;
+ }
+
+ return NULL;
+}
+
+#if defined(HAVE_OPENSSL)
+SSL_CTX *
+logsrvd_server_tls_ctx(void)
+{
+ return logsrvd_config->server.ssl_ctx;
+}
+
+bool
+logsrvd_conf_server_tls_check_peer(void)
+{
+ return logsrvd_config->server.tls_check_peer;
+}
+#endif
+
+/* relay getters */
+struct server_address_list *
+logsrvd_conf_relay_address(void)
+{
+ return &logsrvd_config->relay.relays.addrs;
+}
+
+const char *
+logsrvd_conf_relay_dir(void)
+{
+ return logsrvd_config->relay.relay_dir;
+}
+
+bool
+logsrvd_conf_relay_store_first(void)
+{
+ return logsrvd_config->relay.store_first;
+}
+
+bool
+logsrvd_conf_relay_tcp_keepalive(void)
+{
+ return logsrvd_config->relay.tcp_keepalive;
+}
+
+struct timespec *
+logsrvd_conf_relay_timeout(void)
+{
+ if (sudo_timespecisset(&logsrvd_config->relay.timeout)) {
+ return &logsrvd_config->relay.timeout;
+ }
+
+ return NULL;
+}
+
+struct timespec *
+logsrvd_conf_relay_connect_timeout(void)
+{
+ if (sudo_timespecisset(&logsrvd_config->relay.connect_timeout)) {
+ return &logsrvd_config->relay.connect_timeout;
+ }
+
+ return NULL;
+}
+
+time_t
+logsrvd_conf_relay_retry_interval(void)
+{
+ return logsrvd_config->relay.retry_interval;
+}
+
+#if defined(HAVE_OPENSSL)
+SSL_CTX *
+logsrvd_relay_tls_ctx(void)
+{
+ if (logsrvd_config->relay.ssl_ctx != NULL)
+ return logsrvd_config->relay.ssl_ctx;
+ return logsrvd_config->server.ssl_ctx;
+}
+
+bool
+logsrvd_conf_relay_tls_check_peer(void)
+{
+ if (logsrvd_config->relay.tls_check_peer != -1)
+ return logsrvd_config->relay.tls_check_peer;
+ return logsrvd_config->server.tls_check_peer;
+}
+#endif
+
+/* I/O log callbacks */
+static bool
+cb_iolog_dir(struct logsrvd_config *config, const char *path, size_t offset)
+{
+ debug_decl(cb_iolog_dir, SUDO_DEBUG_UTIL);
+
+ free(config->iolog.iolog_dir);
+ if ((config->iolog.iolog_dir = strdup(path)) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ debug_return_bool(false);
+ }
+ debug_return_bool(true);
+}
+
+static bool
+cb_iolog_file(struct logsrvd_config *config, const char *path, size_t offset)
+{
+ debug_decl(cb_iolog_file, SUDO_DEBUG_UTIL);
+
+ free(config->iolog.iolog_file);
+ if ((config->iolog.iolog_file = strdup(path)) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ debug_return_bool(false);
+ }
+ debug_return_bool(true);
+}
+
+static bool
+cb_iolog_compress(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ 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_log_passwords(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ int val;
+ debug_decl(cb_iolog_log_passwords, SUDO_DEBUG_UTIL);
+
+ if ((val = sudo_strtobool(str)) == -1)
+ debug_return_bool(false);
+
+ config->iolog.log_passwords = val;
+ debug_return_bool(true);
+}
+
+static bool
+cb_iolog_flush(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ 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, size_t offset)
+{
+ struct passwd *pw;
+ debug_decl(cb_iolog_user, SUDO_DEBUG_UTIL);
+
+ if ((pw = getpwnam(user)) == NULL) {
+ sudo_warnx(U_("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, size_t offset)
+{
+ struct group *gr;
+ debug_decl(cb_iolog_group, SUDO_DEBUG_UTIL);
+
+ if ((gr = getgrnam(group)) == NULL) {
+ sudo_warnx(U_("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, size_t offset)
+{
+ const char *errstr;
+ mode_t mode;
+ debug_decl(cb_iolog_mode, SUDO_DEBUG_UTIL);
+
+ mode = sudo_strtomode(str, &errstr);
+ if (errstr != NULL) {
+ sudo_warnx(U_("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, size_t offset)
+{
+ 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_warnx(U_("invalid value for %s: %s"), "maxseq", 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);
+}
+
+static bool
+cb_iolog_passprompt_regex(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ debug_decl(cb_iolog_passprompt_regex, SUDO_DEBUG_UTIL);
+
+ if (config->iolog.passprompt_regex == NULL) {
+ /* Lazy alloc of the passprompt regex handle. */
+ config->iolog.passprompt_regex = iolog_pwfilt_alloc();
+ if (config->iolog.passprompt_regex == NULL)
+ debug_return_bool(false);
+ }
+ debug_return_bool(iolog_pwfilt_add(config->iolog.passprompt_regex, str));
+}
+
+/* Server callbacks */
+static bool
+append_address(struct server_address_list *addresses, const char *str,
+ bool allow_wildcard)
+{
+ struct addrinfo hints, *res, *res0 = NULL;
+ char *sa_str = NULL, *sa_host = NULL;
+ char *copy, *host, *port;
+ bool tls, ret = false;
+ int error;
+ debug_decl(append_address, SUDO_DEBUG_UTIL);
+
+ if ((copy = strdup(str)) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ 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') {
+ if (!allow_wildcard)
+ goto done;
+ host = NULL;
+ }
+
+#if !defined(HAVE_OPENSSL)
+ if (tls) {
+ sudo_warnx("%s", U_("TLS not supported"));
+ goto done;
+ }
+#endif
+
+ /* Only make a single copy of the string + host for all addresses. */
+ if ((sa_str = sudo_rcstr_dup(str)) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ goto done;
+ }
+ if (host != NULL && (sa_host = sudo_rcstr_dup(host)) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ goto done;
+ }
+
+ /* 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;
+#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+ hints.ai_flags |= AI_NUMERICSERV;
+#endif
+ 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 server_address *addr;
+
+ if ((addr = malloc(sizeof(*addr))) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ goto done;
+ }
+ addr->sa_str = sudo_rcstr_addref(sa_str);
+ addr->sa_host = sudo_rcstr_addref(sa_host);
+
+ memcpy(&addr->sa_un, res->ai_addr, res->ai_addrlen);
+ addr->sa_size = res->ai_addrlen;
+ addr->tls = tls;
+ TAILQ_INSERT_TAIL(addresses, addr, entries);
+ }
+
+ ret = true;
+done:
+ sudo_rcstr_delref(sa_str);
+ sudo_rcstr_delref(sa_host);
+ if (res0 != NULL)
+ freeaddrinfo(res0);
+ free(copy);
+ debug_return_bool(ret);
+}
+
+static bool
+cb_server_listen_address(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ return append_address(&config->server.addresses.addrs, str, true);
+}
+
+static bool
+cb_server_timeout(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ time_t timeout;
+ const char *errstr;
+ debug_decl(cb_server_timeout, SUDO_DEBUG_UTIL);
+
+ timeout = sudo_strtonum(str, 0, TIME_T_MAX, &errstr);
+ if (errstr != NULL)
+ debug_return_bool(false);
+
+ config->server.timeout.tv_sec = timeout;
+
+ debug_return_bool(true);
+}
+
+static bool
+cb_server_keepalive(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ int val;
+ debug_decl(cb_server_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_server_pid_file(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ char *copy = NULL;
+ debug_decl(cb_server_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_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ debug_return_bool(false);
+ }
+ }
+
+ free(config->server.pid_file);
+ config->server.pid_file = copy;
+
+ debug_return_bool(true);
+}
+
+static bool
+cb_server_log(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ char *copy = NULL;
+ enum server_log_type log_type = SERVER_LOG_NONE;
+ debug_decl(cb_server_log, SUDO_DEBUG_UTIL);
+
+ /* An empty value means to disable the server log. */
+ if (*str != '\0') {
+ if (*str == '/') {
+ log_type = SERVER_LOG_FILE;
+ if ((copy = strdup(str)) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__,
+ U_("unable to allocate memory"));
+ debug_return_bool(false);
+ }
+ } else if (strcmp(str, "stderr") == 0) {
+ log_type = SERVER_LOG_STDERR;
+ } else if (strcmp(str, "syslog") == 0) {
+ log_type = SERVER_LOG_SYSLOG;
+ } else {
+ debug_return_bool(false);
+ }
+ }
+
+ free(config->server.log_file);
+ config->server.log_file = copy;
+ config->server.log_type = log_type;
+
+ debug_return_bool(true);
+}
+
+#if defined(HAVE_OPENSSL)
+static bool
+cb_tls_key(struct logsrvd_config *config, const char *path, size_t offset)
+{
+ char **p = (char **)((char *)config + offset);
+ debug_decl(cb_tls_key, SUDO_DEBUG_UTIL);
+
+ free(*p);
+ if ((*p = strdup(path)) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ debug_return_bool(false);
+ }
+ debug_return_bool(true);
+}
+
+static bool
+cb_tls_cacert(struct logsrvd_config *config, const char *path, size_t offset)
+{
+ char **p = (char **)((char *)config + offset);
+ debug_decl(cb_tls_cacert, SUDO_DEBUG_UTIL);
+
+ free(*p);
+ if ((*p = strdup(path)) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ debug_return_bool(false);
+ }
+ debug_return_bool(true);
+}
+
+static bool
+cb_tls_cert(struct logsrvd_config *config, const char *path, size_t offset)
+{
+ char **p = (char **)((char *)config + offset);
+ debug_decl(cb_tls_cert, SUDO_DEBUG_UTIL);
+
+ free(*p);
+ if ((*p = strdup(path)) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ debug_return_bool(false);
+ }
+ debug_return_bool(true);
+}
+
+static bool
+cb_tls_dhparams(struct logsrvd_config *config, const char *path, size_t offset)
+{
+ char **p = (char **)((char *)config + offset);
+ debug_decl(cb_tls_dhparams, SUDO_DEBUG_UTIL);
+
+ free(*p);
+ if ((*p = strdup(path)) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ debug_return_bool(false);
+ }
+ debug_return_bool(true);
+}
+
+static bool
+cb_tls_ciphers12(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ char **p = (char **)((char *)config + offset);
+ debug_decl(cb_tls_ciphers12, SUDO_DEBUG_UTIL);
+
+ free(*p);
+ if ((*p = strdup(str)) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ debug_return_bool(false);
+ }
+ debug_return_bool(true);
+}
+
+static bool
+cb_tls_ciphers13(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ char **p = (char **)((char *)config + offset);
+ debug_decl(cb_tls_ciphers13, SUDO_DEBUG_UTIL);
+
+ free(*p);
+ if ((*p = strdup(str)) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ debug_return_bool(false);
+ }
+ debug_return_bool(true);
+}
+
+static bool
+cb_tls_verify(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ int *p = (int *)((char *)config + offset);
+ int val;
+ debug_decl(cb_tls_verify, SUDO_DEBUG_UTIL);
+
+ if ((val = sudo_strtobool(str)) == -1)
+ debug_return_bool(false);
+
+ *p = val;
+ debug_return_bool(true);
+}
+
+static bool
+cb_tls_checkpeer(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ int *p = (int *)((char *)config + offset);
+ int val;
+ debug_decl(cb_tls_checkpeer, SUDO_DEBUG_UTIL);
+
+ if ((val = sudo_strtobool(str)) == -1)
+ debug_return_bool(false);
+
+ *p = val;
+ debug_return_bool(true);
+}
+#endif
+
+/* relay callbacks */
+static bool
+cb_relay_host(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ return append_address(&config->relay.relays.addrs, str, false);
+}
+
+static bool
+cb_relay_timeout(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ time_t timeout;
+ const char *errstr;
+ debug_decl(cb_relay_timeout, SUDO_DEBUG_UTIL);
+
+ timeout = sudo_strtonum(str, 0, TIME_T_MAX, &errstr);
+ if (errstr != NULL)
+ debug_return_bool(false);
+
+ config->server.timeout.tv_sec = timeout;
+
+ debug_return_bool(true);
+}
+
+static bool
+cb_relay_connect_timeout(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ time_t timeout;
+ const char *errstr;
+ debug_decl(cb_relay_connect_timeout, SUDO_DEBUG_UTIL);
+
+ timeout = sudo_strtonum(str, 0, TIME_T_MAX, &errstr);
+ if (errstr != NULL)
+ debug_return_bool(false);
+
+ config->relay.connect_timeout.tv_sec = timeout;
+
+ debug_return_bool(true);
+}
+
+static bool
+cb_relay_dir(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ char *copy = NULL;
+ debug_decl(cb_relay_dir, SUDO_DEBUG_UTIL);
+
+ if ((copy = strdup(str)) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ debug_return_bool(false);
+ }
+
+ free(config->relay.relay_dir);
+ config->relay.relay_dir = copy;
+
+ debug_return_bool(true);
+}
+
+static bool
+cb_retry_interval(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ time_t interval;
+ const char *errstr;
+ debug_decl(cb_retry_interval, SUDO_DEBUG_UTIL);
+
+ interval = sudo_strtonum(str, 0, TIME_T_MAX, &errstr);
+ if (errstr != NULL)
+ debug_return_bool(false);
+
+ config->relay.retry_interval = interval;
+
+ debug_return_bool(true);
+}
+
+static bool
+cb_relay_store_first(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ int val;
+ debug_decl(cb_relay_store_first, SUDO_DEBUG_UTIL);
+
+ if ((val = sudo_strtobool(str)) == -1)
+ debug_return_bool(false);
+
+ config->relay.store_first = val;
+ debug_return_bool(true);
+}
+
+static bool
+cb_relay_keepalive(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ int val;
+ debug_decl(cb_relay_keepalive, SUDO_DEBUG_UTIL);
+
+ if ((val = sudo_strtobool(str)) == -1)
+ debug_return_bool(false);
+
+ config->relay.tcp_keepalive = val;
+ debug_return_bool(true);
+}
+
+/* eventlog callbacks */
+static bool
+cb_eventlog_type(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ 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, size_t offset)
+{
+ 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);
+}
+
+static bool
+cb_eventlog_exit(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ int val;
+ debug_decl(cb_eventlog_exit, SUDO_DEBUG_UTIL);
+
+ if ((val = sudo_strtobool(str)) == -1)
+ debug_return_bool(false);
+
+ config->eventlog.log_exit = val;
+ debug_return_bool(true);
+}
+
+/* syslog callbacks */
+static bool
+cb_syslog_maxlen(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ 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_server_facility(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ int logfac;
+ debug_decl(cb_syslog_server_facility, SUDO_DEBUG_UTIL);
+
+ if (!sudo_str2logfac(str, &logfac)) {
+ sudo_warnx(U_("unknown syslog facility %s"), str);
+ debug_return_bool(false);
+ }
+
+ config->syslog.server_facility = logfac;
+
+ debug_return_bool(true);
+}
+
+static bool
+cb_syslog_facility(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ int logfac;
+ debug_decl(cb_syslog_facility, SUDO_DEBUG_UTIL);
+
+ if (!sudo_str2logfac(str, &logfac)) {
+ sudo_warnx(U_("unknown syslog facility %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, size_t offset)
+{
+ int logpri;
+ debug_decl(cb_syslog_acceptpri, SUDO_DEBUG_UTIL);
+
+ if (!sudo_str2logpri(str, &logpri)) {
+ sudo_warnx(U_("unknown 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, size_t offset)
+{
+ int logpri;
+ debug_decl(cb_syslog_rejectpri, SUDO_DEBUG_UTIL);
+
+ if (!sudo_str2logpri(str, &logpri)) {
+ sudo_warnx(U_("unknown syslog priority %s"), str);
+ debug_return_bool(false);
+ }
+
+ config->syslog.rejectpri = logpri;
+
+ debug_return_bool(true);
+}
+
+static bool
+cb_syslog_alertpri(struct logsrvd_config *config, const char *str, size_t offset)
+{
+ int logpri;
+ debug_decl(cb_syslog_alertpri, SUDO_DEBUG_UTIL);
+
+ if (!sudo_str2logpri(str, &logpri)) {
+ sudo_warnx(U_("unknown 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, size_t offset)
+{
+ char *copy = NULL;
+ debug_decl(cb_logfile_path, SUDO_DEBUG_UTIL);
+
+ if (*str != '/') {
+ sudo_warnx(U_("%s: not a fully qualified path"), str);
+ debug_return_bool(false);
+ }
+ if ((copy = strdup(str)) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ 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, size_t offset)
+{
+ char *copy = NULL;
+ debug_decl(cb_logfile_time_format, SUDO_DEBUG_UTIL);
+
+ if ((copy = strdup(str)) == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ debug_return_bool(false);
+ }
+
+ free(config->logfile.time_format);
+ config->logfile.time_format = copy;
+
+ debug_return_bool(true);
+}
+
+void
+address_list_addref(struct server_address_list *al)
+{
+ struct address_list_container *container =
+ __containerof(al, struct address_list_container, addrs);
+ container->refcnt++;
+}
+
+void
+address_list_delref(struct server_address_list *al)
+{
+ struct address_list_container *container =
+ __containerof(al, struct address_list_container, addrs);
+ if (--container->refcnt == 0) {
+ struct server_address *addr;
+ while ((addr = TAILQ_FIRST(al))) {
+ TAILQ_REMOVE(al, addr, entries);
+ sudo_rcstr_delref(addr->sa_str);
+ sudo_rcstr_delref(addr->sa_host);
+ free(addr);
+ }
+ }
+}
+
+static struct logsrvd_config_entry server_conf_entries[] = {
+ { "listen_address", cb_server_listen_address },
+ { "timeout", cb_server_timeout },
+ { "tcp_keepalive", cb_server_keepalive },
+ { "pid_file", cb_server_pid_file },
+ { "server_log", cb_server_log },
+#if defined(HAVE_OPENSSL)
+ { "tls_key", cb_tls_key, offsetof(struct logsrvd_config, server.tls_key_path) },
+ { "tls_cacert", cb_tls_cacert, offsetof(struct logsrvd_config, server.tls_cacert_path) },
+ { "tls_cert", cb_tls_cert, offsetof(struct logsrvd_config, server.tls_cert_path) },
+ { "tls_dhparams", cb_tls_dhparams, offsetof(struct logsrvd_config, server.tls_dhparams_path) },
+ { "tls_ciphers_v12", cb_tls_ciphers12, offsetof(struct logsrvd_config, server.tls_ciphers_v12) },
+ { "tls_ciphers_v13", cb_tls_ciphers13, offsetof(struct logsrvd_config, server.tls_ciphers_v13) },
+ { "tls_checkpeer", cb_tls_checkpeer, offsetof(struct logsrvd_config, server.tls_check_peer) },
+ { "tls_verify", cb_tls_verify, offsetof(struct logsrvd_config, server.tls_verify) },
+#endif
+ { NULL }
+};
+
+static struct logsrvd_config_entry relay_conf_entries[] = {
+ { "relay_host", cb_relay_host },
+ { "timeout", cb_relay_timeout },
+ { "connect_timeout", cb_relay_connect_timeout },
+ { "relay_dir", cb_relay_dir },
+ { "retry_interval", cb_retry_interval },
+ { "store_first", cb_relay_store_first },
+ { "tcp_keepalive", cb_relay_keepalive },
+#if defined(HAVE_OPENSSL)
+ { "tls_key", cb_tls_key, offsetof(struct logsrvd_config, relay.tls_key_path) },
+ { "tls_cacert", cb_tls_cacert, offsetof(struct logsrvd_config, relay.tls_cacert_path) },
+ { "tls_cert", cb_tls_cert, offsetof(struct logsrvd_config, relay.tls_cert_path) },
+ { "tls_dhparams", cb_tls_dhparams, offsetof(struct logsrvd_config, relay.tls_dhparams_path) },
+ { "tls_ciphers_v12", cb_tls_ciphers12, offsetof(struct logsrvd_config, relay.tls_ciphers_v12) },
+ { "tls_ciphers_v13", cb_tls_ciphers13, offsetof(struct logsrvd_config, relay.tls_ciphers_v13) },
+ { "tls_checkpeer", cb_tls_checkpeer, offsetof(struct logsrvd_config, relay.tls_check_peer) },
+ { "tls_verify", cb_tls_verify, offsetof(struct logsrvd_config, relay.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 },
+ { "log_passwords", cb_iolog_log_passwords },
+ { "maxseq", cb_iolog_maxseq },
+ { "passprompt_regex", cb_iolog_passprompt_regex },
+ { NULL }
+};
+
+static struct logsrvd_config_entry eventlog_conf_entries[] = {
+ { "log_type", cb_eventlog_type },
+ { "log_format", cb_eventlog_format },
+ { "log_exit", cb_eventlog_exit },
+ { NULL }
+};
+
+static struct logsrvd_config_entry syslog_conf_entries[] = {
+ { "maxlen", cb_syslog_maxlen },
+ { "server_facility", cb_syslog_server_facility },
+ { "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 },
+ { "relay", relay_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 *cp, *section_name = line + 1;
+
+ if ((ep = strchr(section_name, ']')) == NULL) {
+ sudo_warnx(U_("%s:%d unmatched '[': %s"),
+ path, lineno, line);
+ goto done;
+ }
+ for (cp = ep + 1; *cp != '\0'; cp++) {
+ if (!isspace((unsigned char)*cp)) {
+ sudo_warnx(U_("%s:%d garbage after ']': %s"),
+ path, lineno, line);
+ goto done;
+ }
+ }
+ *ep = '\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, entry->offset)) {
+ 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 [%s] illegal key: %s"), path, lineno,
+ conf_section->name, line);
+ goto done;
+ }
+ }
+ ret = true;
+
+done:
+ free(line);
+ debug_return_bool(ret);
+}
+
+static FILE *
+logsrvd_open_log_file(const char *path, int flags)
+{
+ mode_t oldmask;
+ FILE *fp = NULL;
+ const char *omode;
+ int fd;
+ debug_decl(logsrvd_open_log_file, SUDO_DEBUG_UTIL);
+
+ if (ISSET(flags, O_APPEND)) {
+ omode = "a";
+ } else {
+ omode = "w";
+ }
+ oldmask = umask(S_IRWXG|S_IRWXO);
+ fd = open(path, flags, S_IRUSR|S_IWUSR);
+ (void)umask(oldmask);
+ if (fd == -1 || (fp = fdopen(fd, omode)) == NULL) {
+ sudo_warn(U_("unable to open log file %s"), path);
+ if (fd != -1)
+ close(fd);
+ }
+
+ debug_return_ptr(fp);
+}
+
+static FILE *
+logsrvd_open_eventlog(struct logsrvd_config *config)
+{
+ int 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;
+ } else {
+ flags = O_WRONLY|O_APPEND|O_CREAT;
+ }
+ debug_return_ptr(logsrvd_open_log_file(config->logfile.path, flags));
+}
+
+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 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;
+}
+
+/* Set I/O log configuration settings from logsrvd config. */
+static void
+logsrvd_conf_iolog_setconf(struct logsrvd_config *config)
+{
+ debug_decl(logsrvd_conf_iolog_setconf, SUDO_DEBUG_UTIL);
+
+ 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);
+
+ debug_return;
+}
+
+/*
+ * Conversation function for use by sudo_warn/sudo_fatal.
+ * Logs to stdout/stderr.
+ */
+static int
+logsrvd_conv_stderr(int num_msgs, const struct sudo_conv_message msgs[],
+ struct sudo_conv_reply replies[], struct sudo_conv_callback *callback)
+{
+ int i;
+ debug_decl(logsrvd_conv_stderr, SUDO_DEBUG_UTIL);
+
+ for (i = 0; i < num_msgs; i++) {
+ if (fputs(msgs[i].msg, stderr) == EOF)
+ debug_return_int(-1);
+ }
+
+ debug_return_int(0);
+}
+
+/*
+ * Conversation function for use by sudo_warn/sudo_fatal.
+ * Acts as a no-op log sink.
+ */
+static int
+logsrvd_conv_none(int num_msgs, const struct sudo_conv_message msgs[],
+ struct sudo_conv_reply replies[], struct sudo_conv_callback *callback)
+{
+ /* Also write to stderr if still in the foreground. */
+ if (logsrvd_warn_enable_stderr) {
+ (void)logsrvd_conv_stderr(num_msgs, msgs, replies, callback);
+ }
+
+ return 0;
+}
+
+/*
+ * Conversation function for use by sudo_warn/sudo_fatal.
+ * Logs to syslog.
+ */
+static int
+logsrvd_conv_syslog(int num_msgs, const struct sudo_conv_message msgs[],
+ struct sudo_conv_reply replies[], struct sudo_conv_callback *callback)
+{
+ char *buf = NULL, *cp = NULL;
+ const char *progname;
+ size_t proglen, bufsize = 0;
+ int i;
+ debug_decl(logsrvd_conv_syslog, SUDO_DEBUG_UTIL);
+
+ if (logsrvd_config == NULL) {
+ debug_return_int(logsrvd_conv_stderr(num_msgs, msgs, replies, callback));
+ }
+
+ /* Also write to stderr if still in the foreground. */
+ if (logsrvd_warn_enable_stderr) {
+ (void)logsrvd_conv_stderr(num_msgs, msgs, replies, callback);
+ }
+
+ /*
+ * Concat messages into a flag string that we can syslog.
+ */
+ progname = getprogname();
+ proglen = strlen(progname);
+ for (i = 0; i < num_msgs; i++) {
+ const char *msg = msgs[i].msg;
+ size_t len = strlen(msg);
+ size_t used = (size_t)(cp - buf);
+
+ /* Strip leading "sudo_logsrvd: " prefix. */
+ if (strncmp(msg, progname, proglen) == 0) {
+ msg += proglen;
+ len -= proglen;
+ if (len == 0) {
+ /* Skip over ": " string that follows program name. */
+ if (i + 1 < num_msgs && strcmp(msgs[i + 1].msg, ": ") == 0) {
+ i++;
+ continue;
+ }
+ } else if (msg[0] == ':' && msg[1] == ' ') {
+ /* Handle "progname: " */
+ msg += 2;
+ len -= 2;
+ }
+ }
+
+ /* Strip off trailing newlines. */
+ while (len > 1 && msg[len - 1] == '\n')
+ len--;
+ if (len == 0)
+ continue;
+
+ if (len >= bufsize - used) {
+ bufsize += 1024;
+ char *tmp = realloc(buf, bufsize);
+ if (tmp == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ free(buf);
+ debug_return_int(-1);
+ }
+ buf = tmp;
+ cp = tmp + used;
+ }
+ memcpy(cp, msg, len);
+ cp[len] = '\0';
+ cp += len;
+ }
+ if (buf != NULL) {
+ openlog(progname, 0, logsrvd_config->syslog.server_facility);
+ syslog(LOG_ERR, "%s", buf);
+ free(buf);
+
+ /* Restore old syslog settings. */
+ if (logsrvd_config->eventlog.log_type == EVLOG_SYSLOG)
+ openlog("sudo", 0, logsrvd_config->syslog.facility);
+ }
+
+ debug_return_int(0);
+}
+
+/*
+ * Conversation function for use by sudo_warn/sudo_fatal.
+ * Logs to an already-open log file.
+ */
+static int
+logsrvd_conv_logfile(int num_msgs, const struct sudo_conv_message msgs[],
+ struct sudo_conv_reply replies[], struct sudo_conv_callback *callback)
+{
+ const char *progname;
+ size_t proglen;
+ int i;
+ debug_decl(logsrvd_conv_logfile, SUDO_DEBUG_UTIL);
+
+ if (logsrvd_config == NULL) {
+ debug_return_int(logsrvd_conv_stderr(num_msgs, msgs, replies, callback));
+ }
+
+ /* Also write to stderr if still in the foreground. */
+ if (logsrvd_warn_enable_stderr) {
+ (void)logsrvd_conv_stderr(num_msgs, msgs, replies, callback);
+ }
+
+ if (logsrvd_config->server.log_stream == NULL) {
+ errno = EBADF;
+ debug_return_int(-1);
+ }
+
+ progname = getprogname();
+ proglen = strlen(progname);
+ for (i = 0; i < num_msgs; i++) {
+ const char *msg = msgs[i].msg;
+ size_t len = strlen(msg);
+
+ /* Strip leading "sudo_logsrvd: " prefix. */
+ if (strncmp(msg, progname, proglen) == 0) {
+ msg += proglen;
+ len -= proglen;
+ if (len == 0) {
+ /* Skip over ": " string that follows program name. */
+ if (i + 1 < num_msgs && strcmp(msgs[i + 1].msg, ": ") == 0) {
+ i++;
+ continue;
+ }
+ } else if (msg[0] == ':' && msg[1] == ' ') {
+ /* Handle "progname: " */
+ msg += 2;
+ len -= 2;
+ }
+ }
+
+ if (fwrite(msg, len, 1, logsrvd_config->server.log_stream) != 1)
+ debug_return_int(-1);
+ }
+
+ debug_return_int(0);
+}
+
+/* Free the specified struct logsrvd_config and its contents. */
+static void
+logsrvd_conf_free(struct logsrvd_config *config)
+{
+ debug_decl(logsrvd_conf_free, SUDO_DEBUG_UTIL);
+
+ if (config == NULL)
+ debug_return;
+
+ /* struct logsrvd_config_server */
+ address_list_delref(&config->server.addresses.addrs);
+ free(config->server.pid_file);
+ free(config->server.log_file);
+ if (config->server.log_stream != NULL)
+ fclose(config->server.log_stream);
+#if defined(HAVE_OPENSSL)
+ free(config->server.tls_key_path);
+ free(config->server.tls_cert_path);
+ free(config->server.tls_cacert_path);
+ free(config->server.tls_dhparams_path);
+ free(config->server.tls_ciphers_v12);
+ free(config->server.tls_ciphers_v13);
+
+ if (config->server.ssl_ctx != NULL)
+ SSL_CTX_free(config->server.ssl_ctx);
+#endif
+
+ /* struct logsrvd_config_relay */
+ address_list_delref(&config->relay.relays.addrs);
+ free(config->relay.relay_dir);
+#if defined(HAVE_OPENSSL)
+ free(config->relay.tls_key_path);
+ free(config->relay.tls_cert_path);
+ free(config->relay.tls_cacert_path);
+ free(config->relay.tls_dhparams_path);
+ free(config->relay.tls_ciphers_v12);
+ free(config->relay.tls_ciphers_v13);
+
+ if (config->relay.ssl_ctx != NULL)
+ SSL_CTX_free(config->relay.ssl_ctx);
+#endif
+
+ /* struct logsrvd_config_iolog */
+ free(config->iolog.iolog_dir);
+ free(config->iolog.iolog_file);
+ iolog_pwfilt_free(config->iolog.passprompt_regex);
+
+ /* struct logsrvd_config_logfile */
+ free(config->logfile.path);
+ free(config->logfile.time_format);
+ if (config->logfile.stream != NULL)
+ fclose(config->logfile.stream);
+
+ free(config);
+
+ debug_return;
+}
+
+/* Allocate a new struct logsrvd_config and set default values. */
+static 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_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ debug_return_ptr(NULL);
+ }
+
+ /* Relay defaults */
+ TAILQ_INIT(&config->relay.relays.addrs);
+ config->relay.relays.refcnt = 1;
+ config->relay.timeout.tv_sec = DEFAULT_SOCKET_TIMEOUT_SEC;
+ config->relay.connect_timeout.tv_sec = DEFAULT_SOCKET_TIMEOUT_SEC;
+ config->relay.tcp_keepalive = true;
+ config->relay.retry_interval = 30;
+ if (!cb_relay_dir(config, _PATH_SUDO_RELAY_DIR, 0))
+ goto bad;
+#if defined(HAVE_OPENSSL)
+ config->relay.tls_verify = -1;
+ config->relay.tls_check_peer = -1;
+#endif
+
+ /* Server defaults */
+ TAILQ_INIT(&config->server.addresses.addrs);
+ config->server.addresses.refcnt = 1;
+ config->server.timeout.tv_sec = DEFAULT_SOCKET_TIMEOUT_SEC;
+ config->server.tcp_keepalive = true;
+ config->server.log_type = SERVER_LOG_SYSLOG;
+ config->server.pid_file = strdup(_PATH_SUDO_LOGSRVD_PID);
+ if (config->server.pid_file == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ 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_cacert_path = strdup(DEFAULT_CA_CERT_PATH);
+ if (config->server.tls_cacert_path == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ goto bad;
+ }
+ }
+ if (access(DEFAULT_SERVER_CERT_PATH, R_OK) == 0) {
+ config->server.tls_cert_path = strdup(DEFAULT_SERVER_CERT_PATH);
+ if (config->server.tls_cert_path == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ goto bad;
+ }
+ }
+ config->server.tls_key_path = strdup(DEFAULT_SERVER_KEY_PATH);
+ if (config->server.tls_key_path == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ goto bad;
+ }
+ config->server.tls_verify = true;
+ config->server.tls_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, 0))
+ goto bad;
+ if (!cb_iolog_file(config, "%{seq}", 0))
+ goto bad;
+ config->iolog.uid = ROOT_UID;
+ config->iolog.gid = ROOT_GID;
+ config->iolog.gid_set = false;
+ config->iolog.log_passwords = true;
+
+ /* Event log defaults */
+ config->eventlog.log_type = EVLOG_SYSLOG;
+ config->eventlog.log_format = EVLOG_SUDO;
+ config->eventlog.log_exit = false;
+
+ /* Syslog defaults */
+ config->syslog.maxlen = 960;
+ config->syslog.server_facility = LOG_DAEMON;
+ if (!cb_syslog_facility(config, LOGFAC, 0)) {
+ sudo_warnx(U_("unknown syslog facility %s"), LOGFAC);
+ goto bad;
+ }
+ if (!cb_syslog_acceptpri(config, PRI_SUCCESS, 0)) {
+ sudo_warnx(U_("unknown syslog priority %s"), PRI_SUCCESS);
+ goto bad;
+ }
+ if (!cb_syslog_rejectpri(config, PRI_FAILURE, 0)) {
+ sudo_warnx(U_("unknown syslog priority %s"), PRI_FAILURE);
+ goto bad;
+ }
+ if (!cb_syslog_alertpri(config, PRI_FAILURE, 0)) {
+ sudo_warnx(U_("unknown syslog priority %s"), PRI_FAILURE);
+ goto bad;
+ }
+
+ /* Log file defaults */
+ if (!cb_logfile_time_format(config, "%h %e %T", 0))
+ goto bad;
+ if (!cb_logfile_path(config, _PATH_SUDO_LOGFILE, 0))
+ goto bad;
+
+ debug_return_ptr(config);
+bad:
+ logsrvd_conf_free(config);
+ debug_return_ptr(NULL);
+}
+
+static bool
+logsrvd_conf_apply(struct logsrvd_config *config)
+{
+#if defined(HAVE_OPENSSL)
+ struct server_address *addr;
+#endif
+ debug_decl(logsrvd_conf_apply, SUDO_DEBUG_UTIL);
+
+ /* There can be multiple passprompt regular expressions. */
+ if (config->iolog.passprompt_regex == NULL) {
+ if (!cb_iolog_passprompt_regex(config, PASSPROMPT_REGEX, 0))
+ debug_return_bool(false);
+ }
+
+ /* There can be multiple addresses so we can't set a default earlier. */
+ if (TAILQ_EMPTY(&config->server.addresses.addrs)) {
+ /* Enable plaintext listender. */
+ if (!cb_server_listen_address(config, "*:" DEFAULT_PORT, 0))
+ debug_return_bool(false);
+#if defined(HAVE_OPENSSL)
+ /* If a certificate was specified, enable the TLS listener too. */
+ if (config->server.tls_cert_path != NULL) {
+ if (!cb_server_listen_address(config, "*:" DEFAULT_PORT_TLS "(tls)", 0))
+ debug_return_bool(false);
+ }
+ } else {
+ /* Check that TLS configuration is valid. */
+ TAILQ_FOREACH(addr, &config->server.addresses.addrs, 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_cert_path == NULL) {
+ config->server.tls_cert_path =
+ strdup(DEFAULT_SERVER_CERT_PATH);
+ if (config->server.tls_cert_path == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__,
+ U_("unable to allocate memory"));
+ debug_return_bool(false);
+ }
+ }
+ break;
+ }
+#endif /* HAVE_OPENSSL */
+ }
+
+#if defined(HAVE_OPENSSL)
+ TAILQ_FOREACH(addr, &config->server.addresses.addrs, entries) {
+ if (!addr->tls)
+ continue;
+ /* Create a TLS context for the server. */
+ config->server.ssl_ctx = init_tls_context(
+ config->server.tls_cacert_path, config->server.tls_cert_path,
+ config->server.tls_key_path, config->server.tls_dhparams_path,
+ config->server.tls_ciphers_v12, config->server.tls_ciphers_v13,
+ config->server.tls_verify);
+ if (config->server.ssl_ctx == NULL) {
+ sudo_warnx("%s", U_("unable to initialize server TLS context"));
+ debug_return_bool(false);
+ }
+ break;
+ }
+
+ if (TLS_CONFIGURED(config->relay)) {
+ TAILQ_FOREACH(addr, &config->relay.relays.addrs, entries) {
+ if (!addr->tls)
+ continue;
+ /* Create a TLS context for the relay. */
+ config->relay.ssl_ctx = init_tls_context(
+ TLS_RELAY_STR(config, tls_cacert_path),
+ TLS_RELAY_STR(config, tls_cert_path),
+ TLS_RELAY_STR(config, tls_key_path),
+ TLS_RELAY_STR(config, tls_dhparams_path),
+ TLS_RELAY_STR(config, tls_ciphers_v12),
+ TLS_RELAY_STR(config, tls_ciphers_v13),
+ TLS_RELAY_INT(config, tls_verify));
+ if (config->relay.ssl_ctx == NULL) {
+ sudo_warnx("%s", U_("unable to initialize relay TLS context"));
+ debug_return_bool(false);
+ }
+ break;
+ }
+ }
+#endif /* HAVE_OPENSSL */
+
+ /* Clear store_first if not relaying. */
+ if (TAILQ_EMPTY(&config->relay.relays.addrs))
+ config->relay.store_first = false;
+
+ /* Open server log if specified. */
+ switch (config->server.log_type) {
+ case SERVER_LOG_SYSLOG:
+ sudo_warn_set_conversation(logsrvd_conv_syslog);
+ break;
+ case SERVER_LOG_FILE:
+ config->server.log_stream =
+ logsrvd_open_log_file(config->server.log_file, O_WRONLY|O_APPEND|O_CREAT);
+ if (config->server.log_stream == NULL)
+ debug_return_bool(false);
+ sudo_warn_set_conversation(logsrvd_conv_logfile);
+ break;
+ case SERVER_LOG_NONE:
+ sudo_warn_set_conversation(logsrvd_conv_none);
+ break;
+ case SERVER_LOG_STDERR:
+ /* Default is stderr. */
+ sudo_warn_set_conversation(NULL);
+ break;
+ default:
+ sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
+ "cannot open unknown log type %d", config->eventlog.log_type);
+ break;
+ }
+
+ /* 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;
+ }
+
+ /*
+ * Update event and I/O log library config and install the new
+ * logsrvd config. We must not fail past this point or the event
+ * and I/O log config will be inconsistent with the logsrvd config.
+ */
+ logsrvd_conf_iolog_setconf(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);
+}
+
+void
+logsrvd_conf_cleanup(void)
+{
+ debug_decl(logsrvd_conf_cleanup, SUDO_DEBUG_UTIL);
+
+ logsrvd_conf_free(logsrvd_config);
+ logsrvd_config = NULL;
+
+ debug_return;
+}
+
+void
+logsrvd_warn_stderr(bool enabled)
+{
+ logsrvd_warn_enable_stderr = enabled;
+}