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>
35 #include <privilege_info.h>
37 #include <cynara_test_client.h>
38 #include <dpl/test/test_runner.h>
41 #include <sm_commons.h>
42 #include <synchronization_pipe.h>
43 #include <sm_request.h>
44 #include <tests_common.h>
45 #include <policy_configuration.h>
46 #include "tzplatform.h"
48 using namespace SecurityManagerTest;
50 // Common implementation details
52 std::string generateProcessLabel(const std::string &appId, const std::string &pkgId, bool isHybrid)
54 std::string label = "User::Pkg::" + pkgId;
56 label += "::App::" + appId;
61 std::string generatePathRWLabel(const std::string &pkgId)
63 return "User::Pkg::" + pkgId;
66 std::string generatePathROLabel(const std::string &pkgId)
68 return generatePathRWLabel(pkgId) + "::RO";
71 std::string generatePathSharedROLabel(const std::string &pkgId)
73 return generatePathRWLabel(pkgId) + "::SharedRO";
76 std::string generatePathTrustedLabel(int64_t authorId)
78 return "User::Author::" + std::to_string(authorId);
81 std::string getPublicPathLabel()
86 // Common DB/nftw checks
88 // nftw doesn't allow passing user data to functions. Work around by using global variable
89 static std::string nftw_expected_label;
90 bool nftw_expected_transmute;
91 bool nftw_expected_exec;
93 static int nftw_check_sm_labels_app_dir(const char *fpath, const struct stat *sb,
94 const char* correctLabel, bool transmute_test, bool exec_test)
98 char* label = nullptr;
101 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_ACCESS);
102 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
103 labelPtr.reset(label);
104 RUNNER_ASSERT_MSG(label != nullptr, "ACCESS label on " << fpath << " is not set");
105 result = strcmp(correctLabel, label);
106 RUNNER_ASSERT_MSG(result == 0, "ACCESS label on " << fpath << " is incorrect"
107 " (should be '" << correctLabel << "' and is '" << label << "')");
111 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_EXEC);
112 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
113 labelPtr.reset(label);
115 if (S_ISREG(sb->st_mode) && (sb->st_mode & S_IXUSR) && exec_test) {
116 RUNNER_ASSERT_MSG(label != nullptr, "EXEC label on " << fpath << " is not set");
117 result = strcmp(correctLabel, label);
118 RUNNER_ASSERT_MSG(result == 0, "Incorrect EXEC label on executable file " << fpath);
120 RUNNER_ASSERT_MSG(label == nullptr, "EXEC label on " << fpath << " is set");
124 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_TRANSMUTE);
125 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
126 labelPtr.reset(label);
128 if (S_ISDIR(sb->st_mode) && transmute_test == true) {
129 RUNNER_ASSERT_MSG(label != nullptr, "TRANSMUTE label on " << fpath << " is not set at all");
130 RUNNER_ASSERT_MSG(strcmp(label,"TRUE") == 0,
131 "TRANSMUTE label on " << fpath << " is not set properly: '"<<label<<"'");
133 RUNNER_ASSERT_MSG(label == nullptr, "TRANSMUTE label on " << fpath << " is set");
139 static int nftw_check_sm_labels(const char *fpath, const struct stat *sb,
140 int /*typeflag*/, struct FTW* /*ftwbuf*/)
142 return nftw_check_sm_labels_app_dir(fpath, sb,
143 nftw_expected_label.c_str(), nftw_expected_transmute, nftw_expected_exec);
146 int nftw_check_labels_non_app_dir(const char *fpath, const struct stat* /*sb*/,
147 int /*typeflag*/, struct FTW* /*ftwbuf*/)
151 char* label = nullptr;
154 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_ACCESS);
155 labelPtr.reset(label);
156 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
157 result = strcmp("canary_label", labelPtr.get());
158 RUNNER_ASSERT_MSG(result == 0, "ACCESS label on " << fpath << " is overwritten");
161 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_EXEC);
162 labelPtr.reset(label);
163 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
164 result = strcmp("canary_label", labelPtr.get());
165 RUNNER_ASSERT_MSG(result == 0, "EXEC label on " << fpath << " is overwritten");
168 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_TRANSMUTE);
169 labelPtr.reset(label);
170 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
171 RUNNER_ASSERT_MSG(labelPtr.get() == nullptr, "TRANSMUTE label on " << fpath << " is set");
176 int nftw_remove_labels(const char *fpath, const struct stat* /*sb*/,
177 int /*typeflag*/, struct FTW* /*ftwbuf*/)
179 smack_lsetlabel(fpath, nullptr, SMACK_LABEL_ACCESS);
180 smack_lsetlabel(fpath, nullptr, SMACK_LABEL_EXEC);
181 smack_lsetlabel(fpath, nullptr, SMACK_LABEL_TRANSMUTE);
186 void check_app_permissions(const std::string &app_id, const std::string &pkg_id,
187 const std::string &user, const privileges_t &allowed_privs,
188 const privileges_t &denied_privs, bool isHybrid)
191 std::string smackLabel = generateProcessLabel(app_id, pkg_id, isHybrid);
193 CynaraTestClient::Client ctc;
195 for (auto &priv : allowed_privs) {
196 ctc.check(smackLabel.c_str(), "", user, priv.c_str(), CYNARA_API_ACCESS_ALLOWED);
199 for (auto &priv : denied_privs) {
200 ctc.check(smackLabel.c_str(), "", user, priv.c_str(), CYNARA_API_ACCESS_DENIED);
204 void sm_app_has_privileges(const AppInstallHelper &app,
205 const std::vector<std::string> &privileges,
208 for (auto const &privilege : privileges) {
210 Api::appHasPrivilege(app.getAppId(), privilege, app.getUID(), result);
211 RUNNER_ASSERT_MSG(result == expectedResult, "Application " << app.getAppId()
212 << " has unexpected access to " << privilege << ", is : "
213 << " should be : " << expectedResult );
217 static void check_app(const std::string &appId, const std::string &pkgId, bool shouldBeInstalled)
220 int ret = security_manager_get_app_pkgid(&retPkgId, appId.c_str());
222 if (shouldBeInstalled) {
223 RUNNER_ASSERT_MSG(ret == SECURITY_MANAGER_SUCCESS, "The given appId is not installed.");
225 if (ret == SECURITY_MANAGER_SUCCESS) {
226 CStringPtr retPkgIdPtr(retPkgId);
227 RUNNER_ASSERT_MSG(strcmp(pkgId.c_str(), retPkgId) == 0,
228 "The given appId does not belong to the given pkgId.");
231 RUNNER_ASSERT_MSG(ret == SECURITY_MANAGER_ERROR_NO_SUCH_OBJECT, "The given appId is installed.");
235 void check_app_after_install(const std::string &app_id, const std::string &pkg_id)
237 check_app(app_id, pkg_id, true);
240 static void check_app_gids(const std::string &app_id, const std::vector<gid_t> &allowed_gids)
243 gid_t main_gid = getgid();
244 std::unordered_set<gid_t> reference_gids(allowed_gids.begin(), allowed_gids.end());
246 // Reset supplementary groups
247 ret = setgroups(0, NULL);
248 RUNNER_ASSERT_MSG(ret != -1, "Unable to set supplementary groups");
250 Api::setProcessGroups(app_id);
252 ret = getgroups(0, nullptr);
253 RUNNER_ASSERT_MSG(ret != -1, "Unable to get supplementary groups");
255 std::vector<gid_t> actual_gids(ret);
256 ret = getgroups(ret, actual_gids.data());
257 RUNNER_ASSERT_MSG(ret != -1, "Unable to get supplementary groups");
259 for (const auto &gid : actual_gids) {
260 RUNNER_ASSERT_MSG(gid == main_gid || reference_gids.count(gid) > 0,
261 "Application shouldn't get access to group " << gid);
262 reference_gids.erase(gid);
265 RUNNER_ASSERT_MSG(reference_gids.empty(), "Application didn't get access to some groups");
268 static const char *const ANY_USER_REPRESENTATION = "anyuser";/*this may be actually any string*/
270 void check_app_after_install(const std::string &app_id, const std::string &pkg_id,
271 const privileges_t &allowed_privs,
272 const privileges_t &denied_privs,
275 check_app(app_id, pkg_id, true);
277 /* Privileges should be granted to all users if root installs app */
278 check_app_permissions(app_id, pkg_id, ANY_USER_REPRESENTATION, allowed_privs, denied_privs, isHybrid);
280 PolicyConfiguration policy;
281 const PolicyConfiguration::GroupVector allowed_groups = policy.privToGroup(allowed_privs);
282 RUNNER_ASSERT_MSG(allowed_groups.size() == allowed_privs.size(),
283 "Some privileges given were not found in the policy");
285 std::vector<gid_t> allowed_gids;
286 for (const auto &groupName : allowed_groups) {
288 struct group* grp = getgrnam(groupName.c_str());
289 RUNNER_ASSERT_ERRNO_MSG(grp, "Group: " << groupName << " not found");
290 allowed_gids.push_back(grp->gr_gid);
293 check_app_gids(app_id, allowed_gids);
296 void check_path(const std::string &path, const std::string &label, bool transmute, bool execute) {
297 nftw_expected_label = label;
298 nftw_expected_transmute = transmute;
299 nftw_expected_exec = execute;
302 int result = nftw(path.c_str(), &nftw_check_sm_labels, FTW_MAX_FDS, FTW_PHYS);
303 RUNNER_ASSERT_MSG(result == 0, "Unable to check Smack labels for " << path);
306 void check_app_after_uninstall(const std::string &app_id, const std::string &pkg_id)
308 check_app(app_id, pkg_id, false);
311 void check_app_after_uninstall(const std::string &app_id, const std::string &pkg_id,
312 const privileges_t &privileges, bool isHybrid)
314 check_app(app_id, pkg_id, false);
316 /* Privileges should not be granted anymore to any user */
317 check_app_permissions(app_id, pkg_id, ANY_USER_REPRESENTATION, {}, privileges, isHybrid);
320 std::string access_opposite(std::string &access) {
321 static const std::map<char, int> access_mapping = {{'r', 0}, {'w', 1}, {'x', 2}, {'a', 3},
323 // May write implies may lock
324 if (access.find('w') != std::string::npos && access.find('l') == std::string::npos) {
327 std::string access_opposite = "rwxatl";
328 for (char c : access) {
329 access_opposite[access_mapping.at(c)] = '-';
331 auto it = std::remove_if(access_opposite.begin(), access_opposite.end(), [](char c) {return c == '-';});
332 access_opposite.erase(it, access_opposite.end());
333 return access_opposite;
336 void check_exact_smack_accesses(const std::string &subject, const std::string &object,
337 const std::string &access) {
338 std::string access_str(access);
339 auto no_access = access_opposite(access_str);
340 for (char c : access_str) {
341 int ret = smack_have_access(subject.c_str(), object.c_str(), std::string(1, c).c_str());
342 RUNNER_ASSERT_MSG(ret >= 0, "smack_have_access failed: <" << subject << ">, <" << object
343 << ">, <" << c << "> errno=" << strerror(errno));
344 RUNNER_ASSERT_MSG(ret == 1, "Access " << c << " from " << subject << " to "
345 << object << " not given");
348 for (char c : no_access) {
349 int ret = smack_have_access(subject.c_str(), object.c_str(), std::string(1, c).c_str());
350 RUNNER_ASSERT_MSG(ret >= 0, "smack_have_access failed: <" << subject << ">, <" << object
351 << ">, <" << c << "> errno=" << strerror(errno));
352 RUNNER_ASSERT_MSG(ret == 0, "Access " << c << " from " << subject << " to "
353 << object << " unnecessarily given");
357 CapsSetsUniquePtr setCaps(const char *cap_string)
359 CapsSetsUniquePtr caps(cap_init());
360 caps.reset(cap_from_text(cap_string));
361 RUNNER_ASSERT_MSG(caps, "can't convert capabilities from text");
362 int result = cap_set_proc(caps.get());
363 RUNNER_ASSERT_MSG(result == 0, "can't set capabilities. Result: " << result);
367 pid_t runInChild(const std::function<void(void)> &process) {
369 RUNNER_ASSERT_ERRNO_MSG(pid >= 0, "fork failed");
378 void runInChildParentWait(const std::function<void(void)> &process) {
380 RUNNER_ASSERT_ERRNO_MSG(pid >= 0, "fork failed");
389 static int getOppositeAccessType(int accessType) {
390 return accessType ^ (R_OK | W_OK | X_OK);
393 static const std::unordered_map<int, const char* const> accessTypeToString {
394 std::make_pair(0, "F_OK"),
395 std::make_pair(1, "X_OK"),
396 std::make_pair(2, "W_OK"),
397 std::make_pair(3, "W_OK|X_OK"),
398 std::make_pair(4, "R_OK"),
399 std::make_pair(5, "R_OK|X_OK"),
400 std::make_pair(6, "R_OK|W_OK"),
401 std::make_pair(7, "R_OK|W_OK|X_OK")
404 void accessCheck(const std::string &id, const std::string &path, int accessType,
407 RUNNER_ASSERT_MSG(::access(path.c_str(), accessType) == expected,
408 "access from " << id << " to path " << path
409 << (expected == 0 ? " not granted" : " unnecessarily granted")
410 << " (" << accessTypeToString.at(accessType) << ")");
413 void runAccessTest(const std::string &label, uid_t uid, gid_t gid,
414 const std::string &testPath, int accessType) {
416 int oppositeAccessType = getOppositeAccessType(accessType);
417 change_label(label.c_str());
418 RUNNER_ASSERT_ERRNO_MSG(0 == drop_root_privileges(uid, gid),
419 "drop_root_privileges failed.");
422 accessCheck(label, testPath, accessType, 0);
423 if (oppositeAccessType != 0) {
424 std::vector<int> singleAccessTypes = {R_OK, W_OK, X_OK};
425 for (auto singleAccessType : singleAccessTypes)
426 if (oppositeAccessType & singleAccessType)
427 accessCheck(label, testPath, singleAccessType, -1);
431 runInChildParentWait(fun);
434 void runAccessTest(const AppInstallHelper &app, const std::string &testPath, int accessType) {
436 int oppositeAccessType = getOppositeAccessType(accessType);
437 Api::setProcessLabel(app.getAppId());
438 RUNNER_ASSERT_ERRNO_MSG(0 == drop_root_privileges(app.getUID(), app.getGID()),
439 "drop_root_privileges failed.");
441 accessCheck(app.getAppId(), testPath, accessType, 0);
442 if (oppositeAccessType != 0) {
443 std::vector<int> singleAccessTypes = {R_OK, W_OK, X_OK};
444 for (auto singleAccessType : singleAccessTypes)
445 if (oppositeAccessType & singleAccessType)
446 accessCheck(app.getAppId(), testPath, singleAccessType, -1);
450 runInChildParentWait(fun);
453 static const std::vector<std::string> SM_SYSTEM_LABELS = {"System", "System::Privileged", "User"};
455 void runSystemAccessTest(uid_t uid, gid_t gid, const std::string &testPath, int accessType) {
456 for (const auto &label : SM_SYSTEM_LABELS)
457 runAccessTest(label, uid, gid, testPath, accessType);
460 bool isPrivilegePrivacy(const std::string &priv) {
461 return (1 == privilege_info_is_privacy(priv.c_str()));
464 int countPrivacyPrivileges(const PrivilegeVector &privs) {
465 return std::count_if(privs.begin(), privs.end(), isPrivilegePrivacy);
468 int countPrivacyPrivileges(const std::vector<std::string> &privs) {
469 return std::count_if(privs.begin(), privs.end(), isPrivilegePrivacy);