Merge "applypatch: Restrict applypatch_check to eMMC targets." am: e02cbaaa62
am: 254d43a3b9
Change-Id: Ic036ffe5fafa8ed07db6d0ce5cb56a40eb6e7f51
diff --git a/applypatch/applypatch.cpp b/applypatch/applypatch.cpp
index 69928bc..fc29493 100644
--- a/applypatch/applypatch.cpp
+++ b/applypatch/applypatch.cpp
@@ -376,24 +376,26 @@
return -1;
}
-int applypatch_check(const char* filename, const std::vector<std::string>& patch_sha1s) {
- // It's okay to specify no SHA-1s; the check will pass if the LoadFileContents is successful.
- // (Useful for reading partitions, where the filename encodes the SHA-1s; no need to check them
- // twice.)
+int applypatch_check(const std::string& filename, const std::vector<std::string>& sha1s) {
+ if (!android::base::StartsWith(filename, "EMMC:")) {
+ return 1;
+ }
+
+ // The check will pass if LoadPartitionContents is successful, because the filename already
+ // encodes the desired SHA-1s.
FileContents file;
- if (LoadFileContents(filename, &file) != 0 ||
- (!patch_sha1s.empty() && FindMatchingPatch(file.sha1, patch_sha1s) < 0)) {
+ if (LoadPartitionContents(filename, &file) != 0) {
LOG(INFO) << "\"" << filename << "\" doesn't have any of expected SHA-1 sums; checking cache";
- // If the source file is missing or corrupted, it might be because we were killed in the middle
- // of patching it. A copy should have been made in cache_temp_source. If that file exists and
- // matches the SHA-1 we're looking for, the check still passes.
+ // If the partition is corrupted, it might be because we were killed in the middle of patching
+ // it. A copy should have been made in cache_temp_source. If that file exists and matches the
+ // SHA-1 we're looking for, the check still passes.
if (LoadFileContents(Paths::Get().cache_temp_source(), &file) != 0) {
LOG(ERROR) << "Failed to load cache file";
return 1;
}
- if (FindMatchingPatch(file.sha1, patch_sha1s) < 0) {
+ if (FindMatchingPatch(file.sha1, sha1s) < 0) {
LOG(ERROR) << "The cache bits don't match any SHA-1 for \"" << filename << "\"";
return 1;
}
diff --git a/applypatch/include/applypatch/applypatch.h b/applypatch/include/applypatch/applypatch.h
index f074e36..92db59c 100644
--- a/applypatch/include/applypatch/applypatch.h
+++ b/applypatch/include/applypatch/applypatch.h
@@ -78,9 +78,10 @@
const std::vector<std::string>& patch_sha1s,
const std::vector<std::unique_ptr<Value>>& patch_data, const Value* bonus_data);
-// Returns 0 if the contents of the file or the cached file match any of the given SHA-1's. Returns
-// nonzero otherwise.
-int applypatch_check(const char* filename, const std::vector<std::string>& patch_sha1s);
+// Returns 0 if the contents of the eMMC target or the cached file match any of the given SHA-1's.
+// Returns nonzero otherwise. 'filename' must refer to an eMMC partition target. It would only use
+// 'sha1s' to find a match on /cache if the hashes embedded in the filename fail to match.
+int applypatch_check(const std::string& filename, const std::vector<std::string>& sha1s);
// Flashes a given image to the target partition. It verifies the target cheksum first, and will
// return if target already has the desired hash. Otherwise it checks the checksum of the given
diff --git a/tests/component/updater_test.cpp b/tests/component/updater_test.cpp
index 0b6b96f..f50e861 100644
--- a/tests/component/updater_test.cpp
+++ b/tests/component/updater_test.cpp
@@ -250,8 +250,10 @@
expect("t", cmd.c_str(), kNoCause);
// Multiple arguments.
+ // As long as it successfully loads the partition specified in filename, it won't check against
+ // any given SHAs.
cmd = "apply_patch_check(\"" + filename + "\", \"wrong_sha1\", \"wrong_sha2\")";
- expect("", cmd.c_str(), kNoCause);
+ expect("t", cmd.c_str(), kNoCause);
cmd = "apply_patch_check(\"" + filename + "\", \"wrong_sha1\", \"" + src_hash +
"\", \"wrong_sha2\")";
diff --git a/tests/unit/applypatch_test.cpp b/tests/unit/applypatch_test.cpp
index 4fbdd37..5cc03bc 100644
--- a/tests/unit/applypatch_test.cpp
+++ b/tests/unit/applypatch_test.cpp
@@ -33,7 +33,6 @@
#include <android-base/test_utils.h>
#include <android-base/unique_fd.h>
#include <gtest/gtest.h>
-#include <openssl/sha.h>
#include "applypatch/applypatch.h"
#include "common/test_constants.h"
@@ -42,139 +41,102 @@
using namespace std::string_literals;
-static void sha1sum(const std::string& fname, std::string* sha1, size_t* fsize = nullptr) {
- ASSERT_TRUE(sha1 != nullptr);
-
- std::string data;
- ASSERT_TRUE(android::base::ReadFileToString(fname, &data));
-
- if (fsize != nullptr) {
- *fsize = data.size();
- }
-
- uint8_t digest[SHA_DIGEST_LENGTH];
- SHA1(reinterpret_cast<const uint8_t*>(data.c_str()), data.size(), digest);
- *sha1 = print_sha1(digest);
-}
-
-static void mangle_file(const std::string& fname) {
- std::string content(1024, '\0');
- for (size_t i = 0; i < 1024; i++) {
- content[i] = rand() % 256;
- }
- ASSERT_TRUE(android::base::WriteStringToFile(content, fname));
-}
-
class ApplyPatchTest : public ::testing::Test {
- public:
+ protected:
void SetUp() override {
- // set up files
old_file = from_testdata_base("old.file");
- new_file = from_testdata_base("new.file");
- nonexistent_file = from_testdata_base("nonexistent.file");
+ FileContents old_fc;
+ ASSERT_EQ(0, LoadFileContents(old_file, &old_fc));
+ old_sha1 = print_sha1(old_fc.sha1);
+ old_size = old_fc.data.size();
- // set up SHA constants
- sha1sum(old_file, &old_sha1, &old_size);
- sha1sum(new_file, &new_sha1, &new_size);
+ new_file = from_testdata_base("new.file");
+ FileContents new_fc;
+ ASSERT_EQ(0, LoadFileContents(new_file, &new_fc));
+ new_sha1 = print_sha1(new_fc.sha1);
+ new_size = new_fc.data.size();
+
srand(time(nullptr));
bad_sha1_a = android::base::StringPrintf("%040x", rand());
bad_sha1_b = android::base::StringPrintf("%040x", rand());
+
+ // Reset the cache backup file.
+ Paths::Get().set_cache_temp_source("/cache/saved.file");
}
std::string old_file;
- std::string new_file;
- std::string nonexistent_file;
-
std::string old_sha1;
+ size_t old_size;
+
+ std::string new_file;
std::string new_sha1;
+ size_t new_size;
+
std::string bad_sha1_a;
std::string bad_sha1_b;
-
- size_t old_size;
- size_t new_size;
};
-TEST_F(ApplyPatchTest, CheckModeSkip) {
- std::vector<std::string> sha1s;
- ASSERT_EQ(0, applypatch_check(&old_file[0], sha1s));
+TEST_F(ApplyPatchTest, CheckMode) {
+ std::string partition = "EMMC:" + old_file + ":" + std::to_string(old_size) + ":" + old_sha1;
+ ASSERT_EQ(0, applypatch_check(partition, {}));
+ ASSERT_EQ(0, applypatch_check(partition, { old_sha1 }));
+ ASSERT_EQ(0, applypatch_check(partition, { bad_sha1_a, bad_sha1_b }));
+ ASSERT_EQ(0, applypatch_check(partition, { bad_sha1_a, old_sha1, bad_sha1_b }));
}
-TEST_F(ApplyPatchTest, CheckModeSingle) {
- std::vector<std::string> sha1s = { old_sha1 };
- ASSERT_EQ(0, applypatch_check(&old_file[0], sha1s));
+TEST_F(ApplyPatchTest, CheckMode_NonEmmcTarget) {
+ ASSERT_NE(0, applypatch_check(old_file, {}));
+ ASSERT_NE(0, applypatch_check(old_file, { old_sha1 }));
+ ASSERT_NE(0, applypatch_check(old_file, { bad_sha1_a, bad_sha1_b }));
+ ASSERT_NE(0, applypatch_check(old_file, { bad_sha1_a, old_sha1, bad_sha1_b }));
}
-TEST_F(ApplyPatchTest, CheckModeMultiple) {
- std::vector<std::string> sha1s = { bad_sha1_a, old_sha1, bad_sha1_b };
- ASSERT_EQ(0, applypatch_check(&old_file[0], sha1s));
-}
-
-TEST_F(ApplyPatchTest, CheckModeFailure) {
- std::vector<std::string> sha1s = { bad_sha1_a, bad_sha1_b };
- ASSERT_NE(0, applypatch_check(&old_file[0], sha1s));
-}
-
-TEST_F(ApplyPatchTest, CheckModeEmmcTarget) {
+TEST_F(ApplyPatchTest, CheckMode_EmmcTarget) {
// EMMC:old_file:size:sha1 should pass the check.
std::string src_file = "EMMC:" + old_file + ":" + std::to_string(old_size) + ":" + old_sha1;
- std::vector<std::string> sha1s;
- ASSERT_EQ(0, applypatch_check(src_file.c_str(), sha1s));
+ ASSERT_EQ(0, applypatch_check(src_file, {}));
// EMMC:old_file:(size-1):sha1:(size+1):sha1 should fail the check.
src_file = "EMMC:" + old_file + ":" + std::to_string(old_size - 1) + ":" + old_sha1 + ":" +
std::to_string(old_size + 1) + ":" + old_sha1;
- ASSERT_EQ(1, applypatch_check(src_file.c_str(), sha1s));
+ ASSERT_NE(0, applypatch_check(src_file, {}));
// EMMC:old_file:(size-1):sha1:size:sha1:(size+1):sha1 should pass the check.
src_file = "EMMC:" + old_file + ":" + std::to_string(old_size - 1) + ":" + old_sha1 + ":" +
std::to_string(old_size) + ":" + old_sha1 + ":" + std::to_string(old_size + 1) + ":" +
old_sha1;
- ASSERT_EQ(0, applypatch_check(src_file.c_str(), sha1s));
+ ASSERT_EQ(0, applypatch_check(src_file, {}));
// EMMC:old_file:(size+1):sha1:(size-1):sha1:size:sha1 should pass the check.
src_file = "EMMC:" + old_file + ":" + std::to_string(old_size + 1) + ":" + old_sha1 + ":" +
std::to_string(old_size - 1) + ":" + old_sha1 + ":" + std::to_string(old_size) + ":" +
old_sha1;
- ASSERT_EQ(0, applypatch_check(src_file.c_str(), sha1s));
+ ASSERT_EQ(0, applypatch_check(src_file, {}));
// EMMC:new_file:(size+1):old_sha1:(size-1):old_sha1:size:old_sha1:size:new_sha1
// should pass the check.
src_file = "EMMC:" + new_file + ":" + std::to_string(old_size + 1) + ":" + old_sha1 + ":" +
std::to_string(old_size - 1) + ":" + old_sha1 + ":" + std::to_string(old_size) + ":" +
old_sha1 + ":" + std::to_string(new_size) + ":" + new_sha1;
- ASSERT_EQ(0, applypatch_check(src_file.c_str(), sha1s));
+ ASSERT_EQ(0, applypatch_check(src_file, {}));
}
-class ApplyPatchCacheTest : public ApplyPatchTest {
- protected:
- void SetUp() override {
- ApplyPatchTest::SetUp();
- Paths::Get().set_cache_temp_source(old_file);
- }
-};
+TEST_F(ApplyPatchTest, CheckMode_UseBackup) {
+ std::string corrupted = "EMMC:" + old_file + ":" + std::to_string(old_size) + ":" + bad_sha1_a;
+ ASSERT_NE(0, applypatch_check(corrupted, { old_sha1 }));
-TEST_F(ApplyPatchCacheTest, CheckCacheCorruptedSourceSingle) {
- TemporaryFile temp_file;
- mangle_file(temp_file.path);
- std::vector<std::string> sha1s_single = { old_sha1 };
- ASSERT_EQ(0, applypatch_check(temp_file.path, sha1s_single));
- ASSERT_EQ(0, applypatch_check(nonexistent_file.c_str(), sha1s_single));
+ Paths::Get().set_cache_temp_source(old_file);
+ ASSERT_EQ(0, applypatch_check(corrupted, { old_sha1 }));
+ ASSERT_EQ(0, applypatch_check(corrupted, { bad_sha1_a, old_sha1, bad_sha1_b }));
}
-TEST_F(ApplyPatchCacheTest, CheckCacheCorruptedSourceMultiple) {
- TemporaryFile temp_file;
- mangle_file(temp_file.path);
- std::vector<std::string> sha1s_multiple = { bad_sha1_a, old_sha1, bad_sha1_b };
- ASSERT_EQ(0, applypatch_check(temp_file.path, sha1s_multiple));
- ASSERT_EQ(0, applypatch_check(nonexistent_file.c_str(), sha1s_multiple));
-}
+TEST_F(ApplyPatchTest, CheckMode_UseBackup_BothCorrupted) {
+ std::string corrupted = "EMMC:" + old_file + ":" + std::to_string(old_size) + ":" + bad_sha1_a;
+ ASSERT_NE(0, applypatch_check(corrupted, {}));
+ ASSERT_NE(0, applypatch_check(corrupted, { old_sha1 }));
-TEST_F(ApplyPatchCacheTest, CheckCacheCorruptedSourceFailure) {
- TemporaryFile temp_file;
- mangle_file(temp_file.path);
- std::vector<std::string> sha1s_failure = { bad_sha1_a, bad_sha1_b };
- ASSERT_NE(0, applypatch_check(temp_file.path, sha1s_failure));
- ASSERT_NE(0, applypatch_check(nonexistent_file.c_str(), sha1s_failure));
+ Paths::Get().set_cache_temp_source(old_file);
+ ASSERT_NE(0, applypatch_check(corrupted, { bad_sha1_a, bad_sha1_b }));
}
class FreeCacheTest : public ::testing::Test {