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// (C) Copyright 2015 Intel Corporation
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#include <security-manager.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <string>
#include <vector>
#define CHECK(x) { \
int _ret = x; \
if (_ret != SECURITY_MANAGER_SUCCESS) { \
fprintf(stderr, "Failure in %s:%d: %s: %d = %s\n", __FILE__, __LINE__, #x, _ret, security_manager_strerror((lib_retcode)_ret)); \
return EXIT_FAILURE; \
} \
}
static int do_install(app_inst_req *preq)
{
CHECK(security_manager_app_install(preq));
return 0;
}
static int do_uninstall(app_inst_req *preq)
{
CHECK(security_manager_app_uninstall(preq));
return 0;
}
static int do_run(const char *appid, const char *uid, const char *file, char *const argv[])
{
if (!appid || !uid) {
fprintf(stderr, "Always need appid, uid for app startup.\n");
return EXIT_FAILURE;
}
pid_t child = fork();
if (child == -1) {
perror("fork");
return EXIT_FAILURE;
} else if (child) {
int status;
child = waitpid(child, &status, 0);
if (child == -1) {
perror("waitpid");
return EXIT_FAILURE;
}
} else {
// We cannot change the UID before security_manager_prepare_app()
// (because then setup_smack() fails to change Smack labels of
// our fds) and we cannot change the UID after it (because then
// security_manager_drop_process_privileges() has already dropped
// the necessary CAP_SETUID.
// Instead, we need to do the steps from security_manager_prepare_app()
// ourselves.
CHECK(security_manager_set_process_label_from_appid(appid));
CHECK(security_manager_set_process_groups_from_appid(appid));
if (setuid(atoi(uid))) {
fprintf(stderr, "setuid(%s): %s\n", uid, strerror(errno));
exit(EXIT_FAILURE);
}
CHECK(security_manager_drop_process_privileges());
// CHECK(security_manager_prepare_app(appid));
execvp(file, argv);
fprintf(stderr, "execvp(%s): %s", argv[optind], strerror(errno));
exit(EXIT_FAILURE);
}
return 0;
}
int main(int argc, char **argv)
{
int flags, opt;
int nsecs, tfnd;
const char *appid = NULL;
const char *pkgid = NULL;
const char *uid = NULL;
std::vector<const char *> privileges;
std::vector< std::pair<app_install_path_type, std::string> > paths;
int install = 0, uninstall = 0, run = 0;
while ((opt = getopt(argc, argv, "a:p:u:r:t:ide")) != -1) {
switch (opt) {
case 'a':
appid = optarg;
break;
case 'p':
pkgid = optarg;
break;
case 'u':
uid = optarg;
break;
case 'r':
privileges.push_back(optarg);
break;
case 't': {
const char *colon = strchr(optarg, ':');
if (!colon) {
fprintf(stderr, "-t parameter must be of the format <type>:<path>");
return EXIT_FAILURE;
}
std::string typestr(optarg, colon - optarg);
std::string path(colon + 1);
app_install_path_type type;
if (typestr == "private") {
type = SECURITY_MANAGER_PATH_PRIVATE;
} else if (typestr == "public") {
type = SECURITY_MANAGER_PATH_PUBLIC;
} else if (typestr == "public-ro") {
type = SECURITY_MANAGER_PATH_PUBLIC_RO;
} else if (typestr == "rw") {
type = SECURITY_MANAGER_PATH_RW;
} else if (typestr == "ro") {
type = SECURITY_MANAGER_PATH_PRIVATE;
} else {
fprintf(stderr, "Invalid -t type: %s", typestr.c_str());
return EXIT_FAILURE;
}
paths.push_back(std::make_pair(type, path));
break;
}
case 'i':
install = 1;
break;
case 'd':
uninstall = 1;
break;
case 'e':
run = 1;
break;
default: /* '?' */
fprintf(stderr,
"Usage: %s -i|-e|-d -a appid -u uid -p pkgid -r privilege1 ... -t private|public|public-ro|rw:<path> ... -- command args\n"
" -i = install, command ignored\n"
" -e = run command, privileges and pkgid ignored\n"
" -d = uninstall, command and privileges ignored\n"
" Install, run, and uninstall can be combined into a single invocation.\n",
argv[0]);
exit(EXIT_FAILURE);
break;
}
}
if ((install || uninstall) &&
(!appid || !pkgid || !uid)) {
fprintf(stderr, "Always need appid, pkgid, uid for app install or uninstall.\n");
return EXIT_FAILURE;
}
if (run && optind >= argc) {
fprintf(stderr, "Expected command after options\n");
return EXIT_FAILURE;
}
app_inst_req *preq;
CHECK(security_manager_app_inst_req_new(&preq));
if (appid) {
CHECK(security_manager_app_inst_req_set_app_id(preq, appid));
}
if (pkgid) {
CHECK(security_manager_app_inst_req_set_pkg_id(preq, pkgid));
}
if (uid) {
CHECK(security_manager_app_inst_req_set_uid(preq, atoi(uid)));
}
for (size_t i = 0; i < paths.size(); i++) {
security_manager_app_inst_req_add_path(preq, paths[i].second.c_str(), paths[i].first);
}
for (size_t i = 0; i < privileges.size(); i++) {
CHECK(security_manager_app_inst_req_add_privilege(preq, privileges[i]));
}
int result = 0;
bool install_failed = false;
if (install) {
result = do_install(preq);
if (result) {
install_failed = true;
}
}
if (run && !install_failed) {
int run_result = do_run(appid, uid, argv[optind], argv + optind);
if (run_result) {
result = run_result;
}
}
if (uninstall && !install_failed) {
int uninstall_result = do_uninstall(preq);
if (uninstall_result) {
result = uninstall_result;
}
}
security_manager_app_inst_req_free(preq);
return result;
}
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