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Merge "vold: remove checkEncryption" am: 2d9777bfbf

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Original change: https://android-review.googlesource.com/c/platform/system/vold/+/1363339

Change-Id: I4ffa4a351292c18dce51247d926ffe7efdbd5bea
This commit is contained in:
Eric Biggers 2020-07-16 20:45:57 +00:00 committed by Automerger Merge Worker
commit 15c0d3e5d0
7 changed files with 0 additions and 197 deletions
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1
Android.bp
View file

@ -109,7 +109,6 @@ cc_library_static {
srcs: [
"AppFuseUtil.cpp",
"Benchmark.cpp",
"CheckEncryption.cpp",
"Checkpoint.cpp",
"CryptoType.cpp",
"Devmapper.cpp",

149
CheckEncryption.cpp
View file

@ -1,149 +0,0 @@
/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "CheckEncryption.h"
#include "FileDeviceUtils.h"
#include "Utils.h"
#include "VolumeManager.h"
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/unique_fd.h>
#include <cutils/iosched_policy.h>
#include <private/android_filesystem_config.h>
#include <sstream>
#include <sys/resource.h>
#include <sys/time.h>
#include <unistd.h>
#include <assert.h>
#include <fcntl.h>
#include <linux/fs.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
using android::base::unique_fd;
using android::base::ReadFileToString;
using android::base::WriteStringToFile;
namespace android {
namespace vold {
constexpr uint32_t max_extents = 32;
constexpr size_t bytecount = 8;
constexpr int repeats = 256;
bool check_file(const std::string& needle) {
LOG(DEBUG) << "checkEncryption check_file: " << needle;
auto haystack = android::vold::BlockDeviceForPath(needle);
if (haystack.empty()) {
LOG(ERROR) << "Failed to find device for path: " << needle;
return false;
}
std::string randombytes;
if (ReadRandomBytes(bytecount, randombytes) != 0) {
LOG(ERROR) << "Failed to read random bytes";
return false;
}
std::string randomhex;
StrToHex(randombytes, randomhex);
std::ostringstream os;
for (int i = 0; i < repeats; i++) os << randomhex;
auto towrite = os.str();
if (access(needle.c_str(), F_OK) == 0) {
if (unlink(needle.c_str()) != 0) {
PLOG(ERROR) << "Failed to unlink " << needle;
return false;
}
}
LOG(DEBUG) << "Writing to " << needle;
if (!WriteStringToFile(towrite, needle)) {
PLOG(ERROR) << "Failed to write " << needle;
return false;
}
sync();
unique_fd haystack_fd(open(haystack.c_str(), O_RDONLY | O_CLOEXEC));
if (haystack_fd.get() == -1) {
PLOG(ERROR) << "Failed to open " << haystack;
return false;
}
auto fiemap = PathFiemap(needle, max_extents);
std::string area;
for (uint32_t i = 0; i < fiemap->fm_mapped_extents; i++) {
auto xt = &(fiemap->fm_extents[i]);
LOG(DEBUG) << "Extent " << i << " at " << xt->fe_physical << " length " << xt->fe_length;
if (lseek64(haystack_fd.get(), xt->fe_physical, SEEK_SET) == -1) {
PLOG(ERROR) << "Failed lseek";
return false;
}
auto toread = xt->fe_length;
while (toread > 0) {
char buf[BUFSIZ];
size_t wlen =
static_cast<size_t>(std::min(static_cast<typeof(toread)>(sizeof(buf)), toread));
auto l = read(haystack_fd.get(), buf, wlen);
if (l < 1) {
PLOG(ERROR) << "Failed read";
if (errno != EINTR) {
return false;
}
}
area.append(buf, l);
toread -= l;
}
}
LOG(DEBUG) << "Searching " << area.size() << " bytes of " << needle;
LOG(DEBUG) << "First position of blob: " << area.find(randomhex);
return true;
}
int CheckEncryption(const std::string& path) {
auto deNeedle(path);
deNeedle += "/misc";
if (android::vold::PrepareDir(deNeedle, 01771, AID_SYSTEM, AID_MISC)) {
return -1;
}
deNeedle += "/vold";
if (android::vold::PrepareDir(deNeedle, 0700, AID_ROOT, AID_ROOT)) {
return -1;
}
deNeedle += "/checkEncryption";
auto neNeedle(path);
neNeedle += "/unencrypted/checkEncryption";
check_file(deNeedle);
check_file(neNeedle);
return 0;
}
} // namespace vold
} // namespace android

31
CheckEncryption.h
View file

@ -1,31 +0,0 @@
/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_VOLD_CHECK_ENCRYPTION_H
#define ANDROID_VOLD_CHECK_ENCRYPTION_H
#include <string>
namespace android {
namespace vold {
/* Check encryption of private volume mounted at the given path */
int CheckEncryption(const std::string& path);
} // namespace vold
} // namespace android
#endif

12
VoldNativeService.cpp
View file

@ -19,7 +19,6 @@
#include "VoldNativeService.h"
#include "Benchmark.h"
#include "CheckEncryption.h"
#include "Checkpoint.h"
#include "FsCrypt.h"
#include "IdleMaint.h"
@ -340,17 +339,6 @@ binder::Status VoldNativeService::benchmark(
return Ok();
}
binder::Status VoldNativeService::checkEncryption(const std::string& volId) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_ID(volId);
ACQUIRE_LOCK;
std::string path;
auto status = pathForVolId(volId, &path);
if (!status.isOk()) return status;
return translate(android::vold::CheckEncryption(path));
}
binder::Status VoldNativeService::moveStorage(
const std::string& fromVolId, const std::string& toVolId,
const android::sp<android::os::IVoldTaskListener>& listener) {

1
VoldNativeService.h
View file

@ -57,7 +57,6 @@ class VoldNativeService : public BinderService<VoldNativeService>, public os::Bn
binder::Status format(const std::string& volId, const std::string& fsType);
binder::Status benchmark(const std::string& volId,
const android::sp<android::os::IVoldTaskListener>& listener);
binder::Status checkEncryption(const std::string& volId);
binder::Status moveStorage(const std::string& fromVolId, const std::string& toVolId,
const android::sp<android::os::IVoldTaskListener>& listener);

1
binder/android/os/IVold.aidl
View file

@ -45,7 +45,6 @@ interface IVold {
void unmount(@utf8InCpp String volId);
void format(@utf8InCpp String volId, @utf8InCpp String fsType);
void benchmark(@utf8InCpp String volId, IVoldTaskListener listener);
void checkEncryption(@utf8InCpp String volId);
void moveStorage(@utf8InCpp String fromVolId, @utf8InCpp String toVolId,
IVoldTaskListener listener);

2
vdc.cpp
View file

@ -103,8 +103,6 @@ int main(int argc, char** argv) {
checkStatus(args, vold->shutdown());
} else if (args[0] == "volume" && args[1] == "reset") {
checkStatus(args, vold->reset());
} else if (args[0] == "cryptfs" && args[1] == "checkEncryption" && args.size() == 3) {
checkStatus(args, vold->checkEncryption(args[2]));
} else if (args[0] == "cryptfs" && args[1] == "mountFstab" && args.size() == 4) {
checkStatus(args, vold->mountFstab(args[2], args[3]));
} else if (args[0] == "cryptfs" && args[1] == "encryptFstab" && args.size() == 4) {