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Merge "applypatch: Restrict applypatch_check to eMMC targets."

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This commit is contained in:
Tao Bao
2018-07-10 06:19:19 +00:00
committed by Gerrit Code Review
parent b9b50cd58c 7c1d426dbc
commit e02cbaaa62
4 changed files with 67 additions and 100 deletions
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applypatch/applypatch.cpp
+12 -10
View File
@@ -376,24 +376,26 @@ static int FindMatchingPatch(const uint8_t* sha1, const std::vector<std::string>
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;
}
applypatch/include/applypatch/applypatch.h
+4 -3
View File
@@ -78,9 +78,10 @@ int applypatch(const char* source_filename, const char* target_filename,
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