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      1 /*
      2  * Copyright (C) 2018 The Android Open Source Project
      3  *
      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
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     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.
     15  */
     16 
     17 #include <dirent.h>
     18 
     19 #include <set>
     20 #include <string>
     21 
     22 #include "TestHelpers.h"
     23 #include "android-base/macros.h"
     24 #include "android-base/stringprintf.h"
     25 #include "gmock/gmock.h"
     26 #include "gtest/gtest.h"
     27 #include "idmap2/FileUtils.h"
     28 #include "private/android_filesystem_config.h"
     29 
     30 using ::testing::NotNull;
     31 
     32 namespace android::idmap2::utils {
     33 
     34 TEST(FileUtilsTests, FindFilesFindEverythingNonRecursive) {
     35   const auto& root = GetTestDataPath();
     36   auto v = utils::FindFiles(root, false,
     37                             [](unsigned char type ATTRIBUTE_UNUSED,
     38                                const std::string& path ATTRIBUTE_UNUSED) -> bool { return true; });
     39   ASSERT_THAT(v, NotNull());
     40   ASSERT_EQ(v->size(), 7U);
     41   ASSERT_EQ(std::set<std::string>(v->begin(), v->end()), std::set<std::string>({
     42                                                              root + "/.",
     43                                                              root + "/..",
     44                                                              root + "/overlay",
     45                                                              root + "/target",
     46                                                              root + "/signature-overlay",
     47                                                              root + "/system-overlay",
     48                                                              root + "/system-overlay-invalid",
     49                                                          }));
     50 }
     51 
     52 TEST(FileUtilsTests, FindFilesFindApkFilesRecursive) {
     53   const auto& root = GetTestDataPath();
     54   auto v = utils::FindFiles(root, true, [](unsigned char type, const std::string& path) -> bool {
     55     return type == DT_REG && path.size() > 4 && path.compare(path.size() - 4, 4, ".apk") == 0;
     56   });
     57   ASSERT_THAT(v, NotNull());
     58   ASSERT_EQ(v->size(), 10U);
     59   ASSERT_EQ(std::set<std::string>(v->begin(), v->end()),
     60             std::set<std::string>(
     61                 {root + "/target/target.apk", root + "/target/target-no-overlayable.apk",
     62                  root + "/overlay/overlay.apk", root + "/overlay/overlay-no-name.apk",
     63                  root + "/overlay/overlay-no-name-static.apk",
     64                  root + "/overlay/overlay-static-1.apk", root + "/overlay/overlay-static-2.apk",
     65                  root + "/signature-overlay/signature-overlay.apk",
     66                  root + "/system-overlay/system-overlay.apk",
     67                  root + "/system-overlay-invalid/system-overlay-invalid.apk"}));
     68 }
     69 
     70 TEST(FileUtilsTests, ReadFile) {
     71   int pipefd[2];
     72   ASSERT_EQ(pipe(pipefd), 0);
     73 
     74   ASSERT_EQ(write(pipefd[1], "foobar", 6), 6);
     75   close(pipefd[1]);
     76 
     77   auto data = ReadFile(pipefd[0]);
     78   ASSERT_THAT(data, NotNull());
     79   ASSERT_EQ(*data, "foobar");
     80   close(pipefd[0]);
     81 }
     82 
     83 #ifdef __ANDROID__
     84 TEST(FileUtilsTests, UidHasWriteAccessToPath) {
     85   constexpr const char* tmp_path = "/data/local/tmp/test@idmap";
     86   const std::string cache_path(base::StringPrintf("%s/test@idmap", kIdmapCacheDir));
     87   const std::string sneaky_cache_path(base::StringPrintf("/data/../%s/test@idmap", kIdmapCacheDir));
     88 
     89   ASSERT_TRUE(UidHasWriteAccessToPath(AID_ROOT, tmp_path));
     90   ASSERT_TRUE(UidHasWriteAccessToPath(AID_ROOT, cache_path));
     91   ASSERT_TRUE(UidHasWriteAccessToPath(AID_ROOT, sneaky_cache_path));
     92 
     93   ASSERT_TRUE(UidHasWriteAccessToPath(AID_SYSTEM, tmp_path));
     94   ASSERT_TRUE(UidHasWriteAccessToPath(AID_SYSTEM, cache_path));
     95   ASSERT_TRUE(UidHasWriteAccessToPath(AID_SYSTEM, sneaky_cache_path));
     96 
     97   constexpr const uid_t AID_SOME_APP = AID_SYSTEM + 1;
     98   ASSERT_TRUE(UidHasWriteAccessToPath(AID_SOME_APP, tmp_path));
     99   ASSERT_FALSE(UidHasWriteAccessToPath(AID_SOME_APP, cache_path));
    100   ASSERT_FALSE(UidHasWriteAccessToPath(AID_SOME_APP, sneaky_cache_path));
    101 }
    102 #endif
    103 
    104 }  // namespace android::idmap2::utils
    105