initial commit

keyring/keyring.cpp

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+/*
+    This file is part of TON Blockchain Library.
+
+    TON Blockchain Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    TON Blockchain Library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with TON Blockchain Library.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2017-2019 Telegram Systems LLP
+*/
+#include "keyring.hpp"
+#include "common/errorcode.h"
+#include "common/io.hpp"
+#include "td/utils/port/path.h"
+#include "td/utils/filesystem.h"
+#include "td/utils/Random.h"
+
+namespace ton {
+
+namespace keyring {
+
+void KeyringImpl::start_up() {
+  td::mkdir(db_root_).ensure();
+}
+
+td::Result<KeyringImpl::PrivateKeyDescr *> KeyringImpl::load_key(PublicKeyHash key_hash) {
+  auto it = map_.find(key_hash);
+  if (it != map_.end()) {
+    return it->second.get();
+  }
+
+  auto name = db_root_ + "/" + key_hash.bits256_value().to_hex();
+
+  auto R = td::read_file(td::CSlice{name});
+  if (R.is_error()) {
+    return R.move_as_error_prefix("key not in db: ");
+  }
+  auto data = R.move_as_ok();
+  auto R2 = PrivateKey::import(td::SecureString(data));
+  R2.ensure();
+
+  auto key = R2.move_as_ok();
+  auto pub = key.compute_public_key();
+  auto short_id = pub.compute_short_id();
+  CHECK(short_id == key_hash);
+
+  auto D = key.create_decryptor_async();
+  D.ensure();
+
+  return map_.emplace(short_id, std::make_unique<PrivateKeyDescr>(D.move_as_ok(), pub, false)).first->second.get();
+}
+
+void KeyringImpl::add_key(PrivateKey key, bool is_temp, td::Promise<td::Unit> promise) {
+  auto pub = key.compute_public_key();
+  auto short_id = pub.compute_short_id();
+
+  if (map_.count(short_id)) {
+    LOG(WARNING) << "duplicate key " << short_id;
+    promise.set_value(td::Unit());
+    return;
+  }
+  auto D = key.create_decryptor_async();
+  D.ensure();
+
+  map_.emplace(short_id, std::make_unique<PrivateKeyDescr>(D.move_as_ok(), pub, is_temp));
+
+  if (!is_temp && key.exportable()) {
+    auto S = key.export_as_slice();
+    auto name = db_root_ + "/" + short_id.bits256_value().to_hex();
+
+    td::write_file(td::CSlice(name), S.as_slice()).ensure();
+  }
+  promise.set_value(td::Unit());
+}
+
+void KeyringImpl::check_key(PublicKeyHash key_hash, td::Promise<td::Unit> promise) {
+  auto S = load_key(key_hash);
+
+  if (S.is_error()) {
+    promise.set_error(S.move_as_error());
+  } else {
+    promise.set_value(td::Unit());
+  }
+}
+
+void KeyringImpl::add_key_short(PublicKeyHash key_hash, td::Promise<PublicKey> promise) {
+  auto S = load_key(key_hash);
+
+  if (S.is_error()) {
+    promise.set_error(S.move_as_error());
+  } else {
+    promise.set_result(map_[key_hash]->public_key);
+  }
+}
+
+void KeyringImpl::del_key(PublicKeyHash key_hash, td::Promise<td::Unit> promise) {
+  map_.erase(key_hash);
+  auto name = db_root_ + "/" + key_hash.bits256_value().to_hex();
+  td::BufferSlice d{256};
+  td::Random::secure_bytes(d.as_slice());
+  td::write_file(name, d.as_slice()).ensure();
+  td::unlink(name).ensure();
+  promise.set_value(td::Unit());
+}
+
+void KeyringImpl::get_public_key(PublicKeyHash key_hash, td::Promise<PublicKey> promise) {
+  auto S = load_key(key_hash);
+
+  if (S.is_error()) {
+    promise.set_error(S.move_as_error());
+  } else {
+    promise.set_result(map_[key_hash]->public_key);
+  }
+}
+
+void KeyringImpl::sign_message(PublicKeyHash key_hash, td::BufferSlice data, td::Promise<td::BufferSlice> promise) {
+  auto S = load_key(key_hash);
+
+  if (S.is_error()) {
+    promise.set_error(S.move_as_error());
+  } else {
+    td::actor::send_closure(S.move_as_ok()->decryptor, &DecryptorAsync::sign, std::move(data), std::move(promise));
+  }
+}
+
+void KeyringImpl::sign_add_get_public_key(PublicKeyHash key_hash, td::BufferSlice data,
+                                          td::Promise<std::pair<td::BufferSlice, PublicKey>> promise) {
+  auto S = load_key(key_hash);
+
+  if (S.is_error()) {
+    promise.set_error(S.move_as_error());
+    return;
+  }
+
+  auto D = S.move_as_ok();
+  auto P = td::PromiseCreator::lambda(
+      [promise = std::move(promise), id = D->public_key](td::Result<td::BufferSlice> R) mutable {
+        if (R.is_error()) {
+          promise.set_error(R.move_as_error());
+          return;
+        }
+        promise.set_value(std::pair<td::BufferSlice, PublicKey>{R.move_as_ok(), id});
+      });
+  td::actor::send_closure(D->decryptor, &DecryptorAsync::sign, std::move(data), std::move(P));
+}
+
+void KeyringImpl::sign_messages(PublicKeyHash key_hash, std::vector<td::BufferSlice> data,
+                                td::Promise<std::vector<td::Result<td::BufferSlice>>> promise) {
+  auto S = load_key(key_hash);
+
+  if (S.is_error()) {
+    promise.set_error(S.move_as_error());
+  } else {
+    td::actor::send_closure(S.move_as_ok()->decryptor, &DecryptorAsync::sign_batch, std::move(data),
+                            std::move(promise));
+  }
+}
+
+void KeyringImpl::decrypt_message(PublicKeyHash key_hash, td::BufferSlice data, td::Promise<td::BufferSlice> promise) {
+  auto S = load_key(key_hash);
+
+  if (S.is_error()) {
+    promise.set_error(S.move_as_error());
+  } else {
+    td::actor::send_closure(S.move_as_ok()->decryptor, &DecryptorAsync::decrypt, std::move(data), std::move(promise));
+  }
+}
+
+td::actor::ActorOwn<Keyring> Keyring::create(std::string db_root) {
+  return td::actor::create_actor<KeyringImpl>("keyring", db_root);
+}
+
+}  // namespace keyring
+
+}  // namespace ton