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/*
* Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
*
* 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
*
*
* @file ss-migrate.cpp
* @author Kyungwook Tak (k.tak@samsung.com)
* @version 1.0
* @brief Deprecated secure-storage data migration
*/
#include <ss-migrate.h>
#include <fstream>
#include <memory>
#include <cerrno>
#include <cstddef>
#include <unistd.h>
#include <dirent.h>
#include <sys/stat.h>
#include <dpl/log/log.h>
#include <ss-crypto.h>
namespace CKM {
namespace SsMigration {
namespace {
const std::string OLD_SS_DIR = RW_DATA_DIR "/secure-storage";
RawBuffer read_data(const std::string &filepath, const std::string &seed)
{
std::ifstream f(filepath.c_str(), std::ios::binary);
if (!f.is_open()) {
LogError("Failed to open file: " << filepath);
return RawBuffer();
}
f.seekg(0, f.end);
auto ciphertext_len = f.tellg();
if (ciphertext_len == -1) {
LogError("Failed to get file length: " << filepath);
return RawBuffer();
}
f.seekg(0, f.beg);
RawBuffer ciphertext(ciphertext_len, 0);
f.read(reinterpret_cast<char *>(ciphertext.data()), ciphertext.size());
if (!f) {
LogError("Failed to read file: " << filepath);
return RawBuffer();
}
return SsMigration::decrypt(seed, ciphertext);
}
inline void remove_path(const std::string &path, bool isAdminUser)
{
if (!isAdminUser)
return;
if (::remove(path.c_str()) == -1)
LogError("Failed to remove path: " << path << " with errno: " << errno);
LogInfo("File removed: " << path);
}
// depth 0 -> OLD_SS_DIR
// 1 -> group dir in OLD_SS_DIR
void visit_dir(const std::string &dirpath, struct dirent *buf, size_t depth,
const Saver &saver, bool isAdminUser)
{
if (depth > 1) {
LogError("Invalid depth in secure-storage subdir... dirpath: " << dirpath);
return;
}
std::unique_ptr<DIR, int(*)(DIR *)> dirptr(::opendir(dirpath.c_str()), ::closedir);
if (dirptr == nullptr) {
LogError("Failed to open dir: " << dirpath << " with errno: " << errno);
return;
}
while (true) {
errno = 0;
struct dirent *result = ::readdir(dirptr.get());
if (result == nullptr) {
if (errno != 0)
LogError("readdir error on secure-storage dir: " << dirpath <<
" with errno: " << errno);
else
remove_path(dirpath, isAdminUser); // end of stream
break;
}
const auto &name = result->d_name;
auto name_size = ::strlen(name);
std::string path = dirpath + "/" + name;
if (result->d_type == DT_DIR) {
if ((name_size == 1 && name[0] == '.') ||
(name_size == 2 && name[0] == '.' && name[1] == '.')) {
continue;
} else if (depth == 1) {
LogError("Invalid hierarchy of secure-storage dir... "
"Directory(" << name << ") cannot be in "
"group storage: " << dirpath);
} else {
std::string subdir = dirpath + "/" + name;
visit_dir(subdir, buf, depth + 1, saver, isAdminUser);
continue;
}
} else if (result->d_type == DT_REG) {
if (depth == 0) {
LogError("Invalid hierarchy of secure-storage dir... "
"File(" << name << ") cannot be in secure-storage top dir");
} else {
LogInfo("Meet file(" << path << ") in secure-storage! "
"Let's save it into key-manager.");
auto storage_name = dirpath.substr(OLD_SS_DIR.length() + 1);
Crypto::Data data;
data.type = DataType::BINARY_DATA;
data.data = read_data(path, storage_name);
if (data.data.empty())
LogError("Failed to read data from file: " << path);
else if (storage_name == "secure-storage")
LogInfo("Meet secure-storage storage which contains SALT! skip it!");
else
saver(name, data, isAdminUser);
}
} else {
LogError("Invalid type(" << result->d_type << ") of file(" << path << ") ");
}
remove_path(path, isAdminUser);
}
}
} // namespace anonymous
bool hasData(void)
{
if (::access(OLD_SS_DIR.c_str(), R_OK | X_OK) == -1) {
const int err = errno;
if (err != ENOENT)
LogError("Failed to access old secure-storage dir. errno: " << err);
return false;
} else {
return true;
}
}
void migrate(bool isAdminUser, const Saver &saver)
{
if (saver == nullptr) {
LogError("saver cannot be null");
return;
}
std::unique_ptr<struct dirent, void(*)(void *)> bufptr(
static_cast<struct dirent *>(::malloc(
offsetof(struct dirent, d_name) + NAME_MAX + 1)), ::free);
if (bufptr == nullptr)
throw std::bad_alloc();
visit_dir(OLD_SS_DIR, bufptr.get(), 0, saver, isAdminUser);
}
} // namespace SsMigration
} // namespace CKM
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