2 * Copyright (c) 2016 - 2019 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.
23 #include <sys/capability.h>
25 #include <sys/types.h>
27 #include <unordered_map>
31 #include <unordered_set>
35 #include <security-manager-types.h>
36 #include <app-runtime.h>
37 #include <sys/smack.h>
38 #include <privilege_info.h>
39 #include <scoped_process_label.h>
41 #include <cynara_test_client.h>
42 #include <dpl/test/test_runner.h>
45 #include <sm_commons.h>
46 #include <synchronization_pipe.h>
47 #include <sm_request.h>
48 #include <tests_common.h>
49 #include <policy_configuration.h>
50 #include "tzplatform.h"
51 #include <label_generator.h>
52 #include <template_parser.h>
54 using namespace SecurityManagerTest;
56 #define CONF_DIR "/usr/share/security-manager/policy/"
58 // Common DB/nftw checks
60 // nftw doesn't allow passing user data to functions. Work around by using global variable
61 static std::string nftw_expected_label;
62 bool nftw_expected_transmute;
63 bool nftw_expected_exec;
65 static int nftw_check_sm_labels_app_dir(const char *fpath, const struct stat *sb,
66 const char* correctLabel, bool transmute_test, bool exec_test)
70 char* label = nullptr;
73 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_ACCESS);
74 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
75 labelPtr.reset(label);
76 RUNNER_ASSERT_MSG(label != nullptr, "ACCESS label on " << fpath << " is not set");
77 result = strcmp(correctLabel, label);
78 RUNNER_ASSERT_MSG(result == 0, "ACCESS label on " << fpath << " is incorrect"
79 " (should be '" << correctLabel << "' and is '" << label << "')");
83 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_EXEC);
84 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
85 labelPtr.reset(label);
87 if (S_ISREG(sb->st_mode) && (sb->st_mode & S_IXUSR) && exec_test) {
88 RUNNER_ASSERT_MSG(label != nullptr, "EXEC label on " << fpath << " is not set");
89 result = strcmp(correctLabel, label);
90 RUNNER_ASSERT_MSG(result == 0, "Incorrect EXEC label on executable file " << fpath);
92 RUNNER_ASSERT_MSG(label == nullptr, "EXEC label on " << fpath << " is set");
96 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_TRANSMUTE);
97 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
98 labelPtr.reset(label);
100 if (S_ISDIR(sb->st_mode) && transmute_test == true) {
101 RUNNER_ASSERT_MSG(label != nullptr, "TRANSMUTE label on " << fpath << " is not set at all");
102 RUNNER_ASSERT_MSG(strcmp(label,"TRUE") == 0,
103 "TRANSMUTE label on " << fpath << " is not set properly: '"<<label<<"'");
105 RUNNER_ASSERT_MSG(label == nullptr, "TRANSMUTE label on " << fpath << " is set");
111 static int nftw_check_sm_labels(const char *fpath, const struct stat *sb,
112 int /*typeflag*/, struct FTW* /*ftwbuf*/)
114 return nftw_check_sm_labels_app_dir(fpath, sb,
115 nftw_expected_label.c_str(), nftw_expected_transmute, nftw_expected_exec);
118 int nftw_check_labels_non_app_dir(const char *fpath, const struct stat* /*sb*/,
119 int /*typeflag*/, struct FTW* /*ftwbuf*/)
123 char* label = nullptr;
126 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_ACCESS);
127 labelPtr.reset(label);
128 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
129 result = strcmp("canary_label", labelPtr.get());
130 RUNNER_ASSERT_MSG(result == 0, "ACCESS label on " << fpath << " is overwritten");
133 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_EXEC);
134 labelPtr.reset(label);
135 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
136 result = strcmp("canary_label", labelPtr.get());
137 RUNNER_ASSERT_MSG(result == 0, "EXEC label on " << fpath << " is overwritten");
140 result = smack_lgetlabel(fpath, &label, SMACK_LABEL_TRANSMUTE);
141 labelPtr.reset(label);
142 RUNNER_ASSERT_MSG(result == 0, "Could not get label for the path");
143 RUNNER_ASSERT_MSG(labelPtr.get() == nullptr, "TRANSMUTE label on " << fpath << " is set");
148 int nftw_remove_labels(const char *fpath, const struct stat* /*sb*/,
149 int /*typeflag*/, struct FTW* /*ftwbuf*/)
151 smack_lsetlabel(fpath, nullptr, SMACK_LABEL_ACCESS);
152 smack_lsetlabel(fpath, nullptr, SMACK_LABEL_EXEC);
153 smack_lsetlabel(fpath, nullptr, SMACK_LABEL_TRANSMUTE);
158 void check_app_permissions(const std::string &app_id, const std::string &pkg_id,
159 const std::string &user, const privileges_t &allowed_privs,
160 const privileges_t &denied_privs, bool isHybrid)
163 std::string smackLabel = generateProcessLabel(app_id, pkg_id, isHybrid);
165 CynaraTestClient::Client ctc;
167 for (auto &priv : allowed_privs) {
168 ctc.check(smackLabel.c_str(), "", user, priv.c_str(), CYNARA_API_ACCESS_ALLOWED);
171 for (auto &priv : denied_privs) {
172 ctc.check(smackLabel.c_str(), "", user, priv.c_str(), CYNARA_API_ACCESS_DENIED);
176 void sm_app_has_privileges(const AppInstallHelper &app,
177 const std::vector<std::string> &privileges,
180 for (auto const &privilege : privileges) {
182 Api::appHasPrivilege(app.getAppId(), privilege, app.getUID(), result);
183 RUNNER_ASSERT_MSG(result == expectedResult, "Application " << app.getAppId()
184 << " has unexpected access to " << privilege << ", is : "
185 << " should be : " << expectedResult );
189 static void check_app_smack_accesses(const std::string &appId, const std::string &pkgId,
190 bool isHybrid = false)
192 static const std::vector<AccessRequest> rules[] =
193 {parseSmackRulesFile(CONF_DIR "pkg-rules-template.smack"),
194 parseSmackRulesFile(CONF_DIR "app-rules-template.smack")};
196 const std::pair<std::string, std::string> switchAliases[] =
197 {std::make_pair("~PATH_RW~", generatePathRWLabel(pkgId)),
198 std::make_pair("~PATH_RO~", generatePathROLabel(pkgId)),
199 std::make_pair("~PATH_SHARED_RO~", generatePathSharedROLabel(pkgId)),
200 std::make_pair("~PROCESS~", generateProcessLabel(appId, pkgId, isHybrid))};
202 for (auto rule : rules[isHybrid]) {
203 if (rule.object == "~PATH_TRUSTED~") {
207 for (const auto &alias : switchAliases) {
208 if (rule.subject == alias.first) {
209 rule.subject = alias.second;
211 if (rule.object == alias.first) {
212 rule.object = alias.second;
216 if (rule.object == "_") {
217 rule.access = "rx" + rule.access;
220 check_exact_smack_accesses(rule.subject, rule.object, rule.access);
224 static void check_app(const std::string &appId, const std::string &pkgId,
225 bool shouldBeInstalled, bool isHybrid)
228 int ret = security_manager_get_app_pkgid(&retPkgId, appId.c_str());
230 if (shouldBeInstalled) {
231 RUNNER_ASSERT_MSG(ret == SECURITY_MANAGER_SUCCESS, "The given appId is not installed.");
233 if (ret == SECURITY_MANAGER_SUCCESS) {
234 CStringPtr retPkgIdPtr(retPkgId);
235 RUNNER_ASSERT_MSG(strcmp(pkgId.c_str(), retPkgId) == 0,
236 "The given appId does not belong to the given pkgId.");
238 check_app_smack_accesses(appId, pkgId, isHybrid);
240 RUNNER_ASSERT_MSG(ret == SECURITY_MANAGER_ERROR_NO_SUCH_OBJECT, "The given appId is installed.");
244 void check_app_after_install(const std::string &app_id, const std::string &pkg_id, bool isHybrid)
246 check_app(app_id, pkg_id, true, isHybrid);
249 static void check_app_gids(const std::string &app_id, const std::vector<gid_t> &allowed_gids)
252 gid_t main_gid = getgid();
253 std::unordered_set<gid_t> reference_gids(allowed_gids.begin(), allowed_gids.end());
255 // Reset supplementary groups
256 ret = setgroups(0, NULL);
257 RUNNER_ASSERT_MSG(ret != -1, "Unable to set supplementary groups");
259 Api::setProcessGroups(app_id);
261 ret = getgroups(0, nullptr);
262 RUNNER_ASSERT_MSG(ret != -1, "Unable to get supplementary groups");
264 std::vector<gid_t> actual_gids(ret);
265 ret = getgroups(ret, actual_gids.data());
266 RUNNER_ASSERT_MSG(ret != -1, "Unable to get supplementary groups");
268 for (const auto &gid : actual_gids) {
269 RUNNER_ASSERT_MSG(gid == main_gid || reference_gids.count(gid) > 0,
270 "Application shouldn't get access to group " << gid);
271 reference_gids.erase(gid);
274 RUNNER_ASSERT_MSG(reference_gids.empty(), "Application didn't get access to some groups");
277 static const char *const ANY_USER_REPRESENTATION = "anyuser";/*this may be actually any string*/
279 void check_app_after_install(const std::string &app_id, const std::string &pkg_id,
280 const privileges_t &allowed_privs,
281 const privileges_t &denied_privs,
284 check_app(app_id, pkg_id, true, isHybrid);
285 /* Privileges should be granted to all users if root installs app */
286 check_app_permissions(app_id, pkg_id, ANY_USER_REPRESENTATION, allowed_privs, denied_privs, isHybrid);
288 PolicyConfiguration policy;
289 const PolicyConfiguration::GroupVector allowed_groups = policy.privToGroup(allowed_privs);
290 RUNNER_ASSERT_MSG(allowed_groups.size() == allowed_privs.size(),
291 "Some privileges given were not found in the policy");
293 std::vector<gid_t> allowed_gids;
294 for (const auto &groupName : allowed_groups) {
296 struct group* grp = getgrnam(groupName.c_str());
297 RUNNER_ASSERT_ERRNO_MSG(grp, "Group: " << groupName << " not found");
298 allowed_gids.push_back(grp->gr_gid);
301 check_app_gids(app_id, allowed_gids);
304 void check_path(const std::string &path, const std::string &label, bool transmute, bool execute) {
305 nftw_expected_label = label;
306 nftw_expected_transmute = transmute;
307 nftw_expected_exec = execute;
310 int result = nftw(path.c_str(), &nftw_check_sm_labels, FTW_MAX_FDS, FTW_PHYS);
311 RUNNER_ASSERT_MSG(result == 0, "Unable to check Smack labels for " << path);
314 void check_app_after_uninstall(const std::string &app_id, const std::string &pkg_id,
317 check_app(app_id, pkg_id, false, isHybrid);
320 void check_app_after_uninstall(const std::string &app_id, const std::string &pkg_id,
321 const privileges_t &privileges, bool isHybrid)
323 check_app(app_id, pkg_id, false, isHybrid);
325 /* Privileges should not be granted anymore to any user */
326 check_app_permissions(app_id, pkg_id, ANY_USER_REPRESENTATION, {}, privileges, isHybrid);
329 std::string access_opposite(std::string &access) {
330 static const std::map<char, int> access_mapping = {{'r', 0}, {'w', 1}, {'x', 2}, {'a', 3},
332 // May write implies may lock
333 if (access.find('w') != std::string::npos && access.find('l') == std::string::npos) {
336 std::string access_opposite = "rwxatl";
337 for (char c : access) {
338 access_opposite[access_mapping.at(c)] = '-';
340 auto it = std::remove_if(access_opposite.begin(), access_opposite.end(), [](char c) {return c == '-';});
341 access_opposite.erase(it, access_opposite.end());
342 return access_opposite;
345 void check_exact_smack_accesses(const std::string &subject, const std::string &object,
346 const std::string &access) {
347 std::string access_str(access);
348 auto no_access = access_opposite(access_str);
349 for (char c : access_str) {
350 int ret = smack_have_access(subject.c_str(), object.c_str(), std::string(1, c).c_str());
351 RUNNER_ASSERT_MSG(ret >= 0, "smack_have_access failed: <" << subject << ">, <" << object
352 << ">, <" << c << "> errno=" << strerror(errno));
353 RUNNER_ASSERT_MSG(ret == 1, "Access " << c << " from " << subject << " to "
354 << object << " not given");
357 for (char c : no_access) {
358 int ret = smack_have_access(subject.c_str(), object.c_str(), std::string(1, c).c_str());
359 RUNNER_ASSERT_MSG(ret >= 0, "smack_have_access failed: <" << subject << ">, <" << object
360 << ">, <" << c << "> errno=" << strerror(errno));
361 RUNNER_ASSERT_MSG(ret == 0, "Access " << c << " from " << subject << " to "
362 << object << " unnecessarily given");
366 CapsSetsUniquePtr setCaps(const char *cap_string)
368 CapsSetsUniquePtr caps(cap_init());
369 caps.reset(cap_from_text(cap_string));
370 RUNNER_ASSERT_MSG(caps, "can't convert capabilities from text");
371 int result = cap_set_proc(caps.get());
372 RUNNER_ASSERT_MSG(result == 0, "can't set capabilities. Result: " << result);
376 static int getOppositeAccessType(int accessType) {
377 return accessType ^ (R_OK | W_OK | X_OK);
380 static const std::unordered_map<int, const char* const> accessTypeToString {
381 std::make_pair(0, "F_OK"),
382 std::make_pair(1, "X_OK"),
383 std::make_pair(2, "W_OK"),
384 std::make_pair(3, "W_OK|X_OK"),
385 std::make_pair(4, "R_OK"),
386 std::make_pair(5, "R_OK|X_OK"),
387 std::make_pair(6, "R_OK|W_OK"),
388 std::make_pair(7, "R_OK|W_OK|X_OK")
391 void accessCheck(const std::string &id, const std::string &path, int accessType,
394 RUNNER_ASSERT_MSG(::access(path.c_str(), accessType) == expected,
395 "access from " << id << " to path " << path
396 << (expected == 0 ? " not granted" : " unnecessarily granted")
397 << " (" << accessTypeToString.at(accessType) << ")");
400 void runAccessTest(const std::string &label, uid_t uid, gid_t gid,
401 const std::string &testPath, int accessType) {
403 int oppositeAccessType = getOppositeAccessType(accessType);
404 ScopedProcessLabel spl(label, false);
405 RUNNER_ASSERT_ERRNO_MSG(0 == drop_root_privileges(uid, gid),
406 "drop_root_privileges failed.");
409 accessCheck(label, testPath, accessType, 0);
410 if (oppositeAccessType != 0) {
411 std::vector<int> singleAccessTypes = {R_OK, W_OK, X_OK};
412 for (auto singleAccessType : singleAccessTypes)
413 if (oppositeAccessType & singleAccessType)
414 accessCheck(label, testPath, singleAccessType, -1);
418 runInChildParentWait(fun);
421 void runAccessTest(const AppInstallHelper &app, const std::string &testPath, int accessType) {
423 int oppositeAccessType = getOppositeAccessType(accessType);
424 Api::setProcessLabel(app.getAppId());
425 RUNNER_ASSERT_ERRNO_MSG(0 == drop_root_privileges(app.getUID(), app.getGID()),
426 "drop_root_privileges failed.");
428 accessCheck(app.getAppId(), testPath, accessType, 0);
429 if (oppositeAccessType != 0) {
430 std::vector<int> singleAccessTypes = {R_OK, W_OK, X_OK};
431 for (auto singleAccessType : singleAccessTypes)
432 if (oppositeAccessType & singleAccessType)
433 accessCheck(app.getAppId(), testPath, singleAccessType, -1);
437 runInChildParentWait(fun);
440 static const std::vector<std::string> SM_SYSTEM_LABELS = {"System", "System::Privileged", "User"};
442 void runSystemAccessTest(uid_t uid, gid_t gid, const std::string &testPath, int accessType) {
443 for (const auto &label : SM_SYSTEM_LABELS)
444 runAccessTest(label, uid, gid, testPath, accessType);
447 bool isAskuserDisabled() {
448 static bool isAskuserDisabled = false;
449 static bool isChecked = false;
452 return isAskuserDisabled;
454 std::string sysShare = TzPlatformConfig::getPath(TZ_SYS_SHARE);
455 std::string askDisableFile = sysShare + "/askuser_disable";
457 isAskuserDisabled = (access(askDisableFile.c_str(), F_OK) != -1);
459 return isAskuserDisabled;
462 bool isPrivilegePrivacy(const std::string &priv) {
463 return (1 == privilege_info_is_privacy(priv.c_str()));
466 int countPrivacyPrivileges(const PrivilegeVector &privs) {
467 return std::count_if(privs.begin(), privs.end(), isPrivilegePrivacy);
470 int countPrivacyPrivileges(const std::vector<std::string> &privs) {
471 return std::count_if(privs.begin(), privs.end(), isPrivilegePrivacy);