140 lines
5.0 KiB
C++
140 lines
5.0 KiB
C++
#include <messmer/blockstore/implementations/ondisk/OnDiskBlockStore.h>
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#include <messmer/blockstore/implementations/inmemory/InMemoryBlockStore.h>
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#include <messmer/blockstore/implementations/inmemory/InMemoryBlock.h>
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#include <cmath>
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#include <cstdio>
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#include <cstdlib>
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#include <messmer/cpp-utils/assert/backtrace.h>
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#include <messmer/cpp-utils/daemon/daemonize.h>
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#include "messmer/fspp/fuse/Fuse.h"
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#include "messmer/fspp/impl/FilesystemImpl.h"
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#include "filesystem/CryDevice.h"
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#include "config/CryConfigLoader.h"
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#include "program_options/Parser.h"
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#include <gitversion/version.h>
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#include <pwd.h>
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//<limits.h> needed for libc to define PASS_MAX
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#include <limits.h>
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#ifdef PASS_MAX
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#error The used libc implementation has a maximal password size for getpass(). We cannot use it to ask for passwords.
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#endif
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using namespace cryfs;
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namespace bf = boost::filesystem;
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using blockstore::ondisk::OnDiskBlockStore;
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using blockstore::inmemory::InMemoryBlockStore;
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using program_options::ProgramOptions;
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using cpputils::make_unique_ref;
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using cpputils::Random;
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using cpputils::IOStreamConsole;
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using std::cout;
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using std::string;
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using std::endl;
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using std::vector;
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using boost::none;
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//TODO Support files > 4GB
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//TODO Improve parallelity.
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//TODO Did deadlock in bonnie++ second run (in the create files sequentially) - maybe also in a later run or different step?
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//TODO Improve error message when root blob wasn't found.
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//TODO Replace ASSERTs with other error handling when it is not a programming error but an environment influence (e.g. a block is missing)
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void showVersion() {
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cout << "CryFS Version " << version::VERSION_STRING << endl;
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if (version::IS_DEV_VERSION) {
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cout << "WARNING! This is a development version based on git commit " << version::GIT_COMMIT_ID <<
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". Please do not use in production!" << endl;
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} else if (!version::IS_STABLE_VERSION) {
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cout << "WARNING! This is an experimental version. Please backup your data frequently!" << endl;
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} else {
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//TODO This is shown for stable version numbers like 0.8 - remove once we reach 1.0
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cout << "WARNING! This version is not considered stable. Please backup your data frequently!" << endl;
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}
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#ifndef NDEBUG
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cout << "WARNING! This is a debug build. Performance might be slow." << endl;
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#endif
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cout << endl;
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}
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bool checkPassword(const string &password) {
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if (password == "") {
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std::cerr << "Empty password not allowed. Please try again." << std::endl;
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return false;
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}
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return true;
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}
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string askPassword() {
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string password = getpass("Password: ");
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while(!checkPassword(password)) {
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password = getpass("Password: ");
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}
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return password;
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};
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bf::path determineConfigFile(const ProgramOptions &options) {
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auto configFile = options.configFile();
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if (configFile == none) {
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return options.baseDir() + "cryfs.config";
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}
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return *configFile;
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}
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CryConfigFile loadOrCreateConfig(const ProgramOptions &options) {
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try {
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auto configFile = determineConfigFile(options);
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auto console = make_unique_ref<IOStreamConsole>();
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auto &keyGenerator = Random::OSRandom();
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auto config = CryConfigLoader(std::move(console), keyGenerator, &askPassword).loadOrCreate(configFile);
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if (config == none) {
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std::cerr << "Could not load config file. Did you enter the correct password?" << std::endl;
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exit(1);
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}
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return std::move(*config);
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} catch (const std::exception &e) {
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std::cerr << "Error: " << e.what() << std::endl;
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exit(1);
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}
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}
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void runFilesystem(const ProgramOptions &options) {
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auto config = loadOrCreateConfig(options);
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//TODO This daemonize causes error messages from CryDevice initialization to get lost.
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// However, initializing CryDevice might (?) already spawn threads and we have to do daemonization before that
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// because it doesn't fork threads. What to do?
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if (!options.foreground()) {
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cpputils::daemonize();
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if (options.logFile() == none) {
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// Setup logging to syslog.
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cpputils::logging::setLogger(spdlog::syslog_logger("cryfs", "cryfs", LOG_PID));
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}
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}
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auto blockStore = make_unique_ref<OnDiskBlockStore>(bf::path(options.baseDir()));
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CryDevice device(std::move(config), std::move(blockStore));
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fspp::FilesystemImpl fsimpl(&device);
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fspp::fuse::Fuse fuse(&fsimpl);
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vector<char*> fuseOptions = options.fuseOptions();
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std::cout << "\nFilesystem is running." << std::endl;
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fuse.run(fuseOptions.size(), fuseOptions.data());
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}
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int main(int argc, char *argv[]) {
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cpputils::showBacktraceOnSigSegv();
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showVersion();
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ProgramOptions options = program_options::Parser(argc, argv).parse();
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//TODO Test that --logfile parameter works. Should be: file if specified, otherwise stderr if foreground, else syslog.
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if (options.logFile() != none) {
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cpputils::logging::setLogger(spdlog::create<spdlog::sinks::simple_file_sink<std::mutex>>("cryfs", *options.logFile()));
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}
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runFilesystem(options);
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return 0;
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}
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