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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "include/compat.h"
#include "include/scope_guard.h"
#include "tools/rbd/ArgumentTypes.h"
#include "tools/rbd/Shell.h"
#include "tools/rbd/Utils.h"
#include "common/errno.h"
#include <fstream>
#include <iostream>
#include <boost/program_options.hpp>
namespace rbd {
namespace action {
namespace encryption {
namespace at = argument_types;
namespace po = boost::program_options;
void get_arguments(po::options_description *positional,
po::options_description *options) {
at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
positional->add_options()
("format", "encryption format [possible values: luks1, luks2]")
("passphrase-file",
"path of file containing passphrase for unlocking the image");
options->add_options()
("cipher-alg", po::value<at::EncryptionAlgorithm>(),
"encryption algorithm [possible values: aes-128, aes-256 (default)]");
}
int execute(const po::variables_map &vm,
const std::vector<std::string> &ceph_global_init_args) {
size_t arg_index = 0;
std::string pool_name;
std::string namespace_name;
std::string image_name;
std::string snap_name;
int r = utils::get_pool_image_snapshot_names(
vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &namespace_name,
&image_name, &snap_name, true, utils::SNAPSHOT_PRESENCE_NONE,
utils::SPEC_VALIDATION_NONE);
if (r < 0) {
return r;
}
std::string format_str = utils::get_positional_argument(vm, arg_index++);
if (format_str.empty()) {
std::cerr << "rbd: must specify format." << std::endl;
return -EINVAL;
}
std::string passphrase_file =
utils::get_positional_argument(vm, arg_index++);
if (passphrase_file.empty()) {
std::cerr << "rbd: must specify passphrase-file." << std::endl;
return -EINVAL;
}
std::ifstream file(passphrase_file.c_str());
if (file.fail()) {
std::cerr << "rbd: unable to open passphrase file " << passphrase_file
<< ": " << cpp_strerror(errno) << std::endl;
return -errno;
}
std::string passphrase((std::istreambuf_iterator<char>(file)),
(std::istreambuf_iterator<char>()));
auto sg = make_scope_guard([&] {
ceph_memzero_s(&passphrase[0], passphrase.size(), passphrase.size()); });
file.close();
if (!passphrase.empty() && passphrase[passphrase.length() - 1] == '\n') {
passphrase.erase(passphrase.length() - 1);
}
auto alg = RBD_ENCRYPTION_ALGORITHM_AES256;
if (vm.count("cipher-alg")) {
alg = vm["cipher-alg"].as<librbd::encryption_algorithm_t>();
}
librados::Rados rados;
librados::IoCtx io_ctx;
librbd::Image image;
r = utils::init_and_open_image(pool_name, namespace_name, image_name, "", "",
false, &rados, &io_ctx, &image);
if (r < 0) {
return r;
}
if (format_str == "luks1") {
librbd::encryption_luks1_format_options_t opts = {};
opts.alg = alg;
opts.passphrase = passphrase;
r = image.encryption_format(
RBD_ENCRYPTION_FORMAT_LUKS1, &opts, sizeof(opts));
} else if (format_str == "luks2") {
librbd::encryption_luks2_format_options_t opts = {};
opts.alg = alg;
opts.passphrase = passphrase;
r = image.encryption_format(
RBD_ENCRYPTION_FORMAT_LUKS2, &opts, sizeof(opts));
} else {
std::cerr << "rbd: unsupported encryption format" << std::endl;
return -ENOTSUP;
}
if (r < 0) {
std::cerr << "rbd: encryption format error: " << cpp_strerror(r)
<< std::endl;
}
return r;
}
Shell::Action action(
{"encryption", "format"}, {}, "Format image to an encrypted format.", "",
&get_arguments, &execute);
} // namespace encryption
} // namespace action
} // namespace rbd
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