2 * Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
22 #include <sys/capability.h>
24 #include <sys/types.h>
26 #include <unordered_map>
29 #include <unordered_set>
32 #include <security-manager-types.h>
33 #include <app-runtime.h>
34 #include <sys/smack.h>
36 #include <cynara_test_client.h>
37 #include <dpl/test/test_runner.h>
40 #include <sm_commons.h>
41 #include <synchronization_pipe.h>
42 #include <sm_request.h>
43 #include <tests_common.h>
44 #include <policy_configuration.h>
45 #include "tzplatform.h"
47 using namespace SecurityManagerTest;
49 // Common implementation details
51 std::string generateProcessLabel(const std::string &appId, const std::string &pkgId, bool isHybrid)
53 std::string label = "User::Pkg::" + pkgId;
55 label += "::App::" + appId;
60 std::string generatePathRWLabel(const std::string &pkgId)
62 return "User::Pkg::" + pkgId;
65 std::string generatePathROLabel(const std::string &pkgId)
67 return generatePathRWLabel(pkgId) + "::RO";
70 std::string generatePathSharedROLabel(const std::string &pkgId)
72 return generatePathRWLabel(pkgId) + "::SharedRO";
75 std::string generatePathTrustedLabel(int64_t authorId)
77 return "User::Author::" + std::to_string(authorId);
80 std::string getPublicPathLabel()
85 // Common DB/nftw checks
87 // nftw doesn't allow passing user data to functions. Work around by using global variable
88 static std::string nftw_expected_label;
89 bool nftw_expected_transmute;
90 bool nftw_expected_exec;
92 static int nftw_check_sm_labels_app_dir(const char *fpath, const struct stat *sb,
93 const char* correctLabel, bool transmute_test, bool exec_test)
97 char* label = nullptr;
100 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_ACCESS);
101 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
102 labelPtr.reset(label);
103 RUNNER_ASSERT_MSG(label != nullptr, "ACCESS label on " << fpath << " is not set");
104 result = strcmp(correctLabel, label);
105 RUNNER_ASSERT_MSG(result == 0, "ACCESS label on " << fpath << " is incorrect"
106 " (should be '" << correctLabel << "' and is '" << label << "')");
110 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_EXEC);
111 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
112 labelPtr.reset(label);
114 if (S_ISREG(sb->st_mode) && (sb->st_mode & S_IXUSR) && exec_test) {
115 RUNNER_ASSERT_MSG(label != nullptr, "EXEC label on " << fpath << " is not set");
116 result = strcmp(correctLabel, label);
117 RUNNER_ASSERT_MSG(result == 0, "Incorrect EXEC label on executable file " << fpath);
119 RUNNER_ASSERT_MSG(label == nullptr, "EXEC label on " << fpath << " is set");
123 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_TRANSMUTE);
124 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
125 labelPtr.reset(label);
127 if (S_ISDIR(sb->st_mode) && transmute_test == true) {
128 RUNNER_ASSERT_MSG(label != nullptr, "TRANSMUTE label on " << fpath << " is not set at all");
129 RUNNER_ASSERT_MSG(strcmp(label,"TRUE") == 0,
130 "TRANSMUTE label on " << fpath << " is not set properly: '"<<label<<"'");
132 RUNNER_ASSERT_MSG(label == nullptr, "TRANSMUTE label on " << fpath << " is set");
138 static int nftw_check_sm_labels(const char *fpath, const struct stat *sb,
139 int /*typeflag*/, struct FTW* /*ftwbuf*/)
141 return nftw_check_sm_labels_app_dir(fpath, sb,
142 nftw_expected_label.c_str(), nftw_expected_transmute, nftw_expected_exec);
145 int nftw_check_labels_non_app_dir(const char *fpath, const struct stat* /*sb*/,
146 int /*typeflag*/, struct FTW* /*ftwbuf*/)
150 char* label = nullptr;
153 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_ACCESS);
154 labelPtr.reset(label);
155 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
156 result = strcmp("canary_label", labelPtr.get());
157 RUNNER_ASSERT_MSG(result == 0, "ACCESS label on " << fpath << " is overwritten");
160 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_EXEC);
161 labelPtr.reset(label);
162 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
163 result = strcmp("canary_label", labelPtr.get());
164 RUNNER_ASSERT_MSG(result == 0, "EXEC label on " << fpath << " is overwritten");
167 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_TRANSMUTE);
168 labelPtr.reset(label);
169 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
170 RUNNER_ASSERT_MSG(labelPtr.get() == nullptr, "TRANSMUTE label on " << fpath << " is set");
175 int nftw_remove_labels(const char *fpath, const struct stat* /*sb*/,
176 int /*typeflag*/, struct FTW* /*ftwbuf*/)
178 smack_lsetlabel(fpath, nullptr, SMACK_LABEL_ACCESS);
179 smack_lsetlabel(fpath, nullptr, SMACK_LABEL_EXEC);
180 smack_lsetlabel(fpath, nullptr, SMACK_LABEL_TRANSMUTE);
185 void check_app_permissions(const std::string &app_id, const std::string &pkg_id,
186 const std::string &user, const privileges_t &allowed_privs,
187 const privileges_t &denied_privs, bool isHybrid)
190 std::string smackLabel = generateProcessLabel(app_id, pkg_id, isHybrid);
192 CynaraTestClient::Client ctc;
194 for (auto &priv : allowed_privs) {
195 ctc.check(smackLabel.c_str(), "", user, priv.c_str(), CYNARA_API_ACCESS_ALLOWED);
198 for (auto &priv : denied_privs) {
199 ctc.check(smackLabel.c_str(), "", user, priv.c_str(), CYNARA_API_ACCESS_DENIED);
203 void sm_app_has_privileges(const AppInstallHelper &app,
204 const std::vector<std::string> &privileges,
207 for (auto const &privilege : privileges) {
209 Api::appHasPrivilege(app.getAppId(), privilege, app.getUID(), result);
210 RUNNER_ASSERT_MSG(result == expectedResult, "Application " << app.getAppId()
211 << " has unexpected access to " << privilege << ", is : "
212 << " should be : " << expectedResult );
216 static void check_app(const std::string &appId, const std::string &pkgId, bool shouldBeInstalled)
219 int ret = security_manager_get_app_pkgid(&retPkgId, appId.c_str());
221 if (shouldBeInstalled) {
222 RUNNER_ASSERT_MSG(ret == SECURITY_MANAGER_SUCCESS, "The given appId is not installed.");
224 if (ret == SECURITY_MANAGER_SUCCESS) {
225 CStringPtr retPkgIdPtr(retPkgId);
226 RUNNER_ASSERT_MSG(strcmp(pkgId.c_str(), retPkgId) == 0,
227 "The given appId does not belong to the given pkgId.");
230 RUNNER_ASSERT_MSG(ret == SECURITY_MANAGER_ERROR_NO_SUCH_OBJECT, "The given appId is installed.");
234 void check_app_after_install(const std::string &app_id, const std::string &pkg_id)
236 check_app(app_id, pkg_id, true);
239 static void check_app_gids(const std::string &app_id, const std::vector<gid_t> &allowed_gids)
242 gid_t main_gid = getgid();
243 std::unordered_set<gid_t> reference_gids(allowed_gids.begin(), allowed_gids.end());
245 // Reset supplementary groups
246 ret = setgroups(0, NULL);
247 RUNNER_ASSERT_MSG(ret != -1, "Unable to set supplementary groups");
249 Api::setProcessGroups(app_id);
251 ret = getgroups(0, nullptr);
252 RUNNER_ASSERT_MSG(ret != -1, "Unable to get supplementary groups");
254 std::vector<gid_t> actual_gids(ret);
255 ret = getgroups(ret, actual_gids.data());
256 RUNNER_ASSERT_MSG(ret != -1, "Unable to get supplementary groups");
258 for (const auto &gid : actual_gids) {
259 RUNNER_ASSERT_MSG(gid == main_gid || reference_gids.count(gid) > 0,
260 "Application shouldn't get access to group " << gid);
261 reference_gids.erase(gid);
264 RUNNER_ASSERT_MSG(reference_gids.empty(), "Application didn't get access to some groups");
267 static const char *const ANY_USER_REPRESENTATION = "anyuser";/*this may be actually any string*/
269 void check_app_after_install(const std::string &app_id, const std::string &pkg_id,
270 const privileges_t &allowed_privs,
271 const privileges_t &denied_privs,
274 check_app(app_id, pkg_id, true);
276 /* Privileges should be granted to all users if root installs app */
277 check_app_permissions(app_id, pkg_id, ANY_USER_REPRESENTATION, allowed_privs, denied_privs, isHybrid);
279 PolicyConfiguration policy;
280 const PolicyConfiguration::GroupVector allowed_groups = policy.privToGroup(allowed_privs);
281 RUNNER_ASSERT_MSG(allowed_groups.size() == allowed_privs.size(),
282 "Some privileges given were not found in the policy");
284 std::vector<gid_t> allowed_gids;
285 for (const auto &groupName : allowed_groups) {
287 struct group* grp = getgrnam(groupName.c_str());
288 RUNNER_ASSERT_ERRNO_MSG(grp, "Group: " << groupName << " not found");
289 allowed_gids.push_back(grp->gr_gid);
292 check_app_gids(app_id, allowed_gids);
295 void check_path(const std::string &path, const std::string &label, bool transmute, bool execute) {
296 nftw_expected_label = label;
297 nftw_expected_transmute = transmute;
298 nftw_expected_exec = execute;
301 int result = nftw(path.c_str(), &nftw_check_sm_labels, FTW_MAX_FDS, FTW_PHYS);
302 RUNNER_ASSERT_MSG(result == 0, "Unable to check Smack labels for " << path);
305 void check_app_after_uninstall(const std::string &app_id, const std::string &pkg_id)
307 check_app(app_id, pkg_id, false);
310 void check_app_after_uninstall(const std::string &app_id, const std::string &pkg_id,
311 const privileges_t &privileges, bool isHybrid)
313 check_app(app_id, pkg_id, false);
315 /* Privileges should not be granted anymore to any user */
316 check_app_permissions(app_id, pkg_id, ANY_USER_REPRESENTATION, {}, privileges, isHybrid);
319 std::string access_opposite(std::string &access) {
320 static const std::map<char, int> access_mapping = {{'r', 0}, {'w', 1}, {'x', 2}, {'a', 3},
322 // May write implies may lock
323 if (access.find('w') != std::string::npos && access.find('l') == std::string::npos) {
326 std::string access_opposite = "rwxatl";
327 for (char c : access) {
328 access_opposite[access_mapping.at(c)] = '-';
330 auto it = std::remove_if(access_opposite.begin(), access_opposite.end(), [](char c) {return c == '-';});
331 access_opposite.erase(it, access_opposite.end());
332 return access_opposite;
335 void check_exact_smack_accesses(const std::string &subject, const std::string &object,
336 const std::string &access) {
337 std::string access_str(access);
338 auto no_access = access_opposite(access_str);
339 for (char c : access_str) {
340 int ret = smack_have_access(subject.c_str(), object.c_str(), std::string(1, c).c_str());
341 RUNNER_ASSERT_MSG(ret >= 0, "smack_have_access failed: <" << subject << ">, <" << object
342 << ">, <" << c << "> errno=" << strerror(errno));
343 RUNNER_ASSERT_MSG(ret == 1, "Access " << c << " from " << subject << " to "
344 << object << " not given");
347 for (char c : no_access) {
348 int ret = smack_have_access(subject.c_str(), object.c_str(), std::string(1, c).c_str());
349 RUNNER_ASSERT_MSG(ret >= 0, "smack_have_access failed: <" << subject << ">, <" << object
350 << ">, <" << c << "> errno=" << strerror(errno));
351 RUNNER_ASSERT_MSG(ret == 0, "Access " << c << " from " << subject << " to "
352 << object << " unnecessarily given");
356 CapsSetsUniquePtr setCaps(const char *cap_string)
358 CapsSetsUniquePtr caps(cap_init());
359 caps.reset(cap_from_text(cap_string));
360 RUNNER_ASSERT_MSG(caps, "can't convert capabilities from text");
361 int result = cap_set_proc(caps.get());
362 RUNNER_ASSERT_MSG(result == 0, "can't set capabilities. Result: " << result);
366 pid_t runInChild(const std::function<void(void)> &process) {
368 RUNNER_ASSERT_ERRNO_MSG(pid >= 0, "fork failed");
377 void runInChildParentWait(const std::function<void(void)> &process) {
379 RUNNER_ASSERT_ERRNO_MSG(pid >= 0, "fork failed");
388 static int getOppositeAccessType(int accessType) {
389 return accessType ^ (R_OK | W_OK | X_OK);
392 static const std::unordered_map<int, const char* const> accessTypeToString {
393 std::make_pair(0, "F_OK"),
394 std::make_pair(1, "X_OK"),
395 std::make_pair(2, "W_OK"),
396 std::make_pair(3, "W_OK|X_OK"),
397 std::make_pair(4, "R_OK"),
398 std::make_pair(5, "R_OK|X_OK"),
399 std::make_pair(6, "R_OK|W_OK"),
400 std::make_pair(7, "R_OK|W_OK|X_OK")
403 void accessCheck(const std::string &id, const std::string &path, int accessType,
406 RUNNER_ASSERT_MSG(::access(path.c_str(), accessType) == expected,
407 "access from " << id << " to path " << path
408 << (expected == 0 ? " not granted" : " unnecessarily granted")
409 << " (" << accessTypeToString.at(accessType) << ")");
412 void runAccessTest(const std::string &label, uid_t uid, gid_t gid,
413 const std::string &testPath, int accessType) {
415 int oppositeAccessType = getOppositeAccessType(accessType);
416 change_label(label.c_str());
417 RUNNER_ASSERT_ERRNO_MSG(0 == drop_root_privileges(uid, gid),
418 "drop_root_privileges failed.");
421 accessCheck(label, testPath, accessType, 0);
422 if (oppositeAccessType != 0) {
423 std::vector<int> singleAccessTypes = {R_OK, W_OK, X_OK};
424 for (auto singleAccessType : singleAccessTypes)
425 if (oppositeAccessType & singleAccessType)
426 accessCheck(label, testPath, singleAccessType, -1);
430 runInChildParentWait(fun);
433 void runAccessTest(const AppInstallHelper &app, const std::string &testPath, int accessType) {
435 int oppositeAccessType = getOppositeAccessType(accessType);
436 Api::setProcessLabel(app.getAppId());
437 RUNNER_ASSERT_ERRNO_MSG(0 == drop_root_privileges(app.getUID(), app.getGID()),
438 "drop_root_privileges failed.");
440 accessCheck(app.getAppId(), testPath, accessType, 0);
441 if (oppositeAccessType != 0) {
442 std::vector<int> singleAccessTypes = {R_OK, W_OK, X_OK};
443 for (auto singleAccessType : singleAccessTypes)
444 if (oppositeAccessType & singleAccessType)
445 accessCheck(app.getAppId(), testPath, singleAccessType, -1);
449 runInChildParentWait(fun);
452 static const std::vector<std::string> SM_SYSTEM_LABELS = {"System", "System::Privileged", "User"};
454 void runSystemAccessTest(uid_t uid, gid_t gid, const std::string &testPath, int accessType) {
455 for (const auto &label : SM_SYSTEM_LABELS)
456 runAccessTest(label, uid, gid, testPath, accessType);