simplewallet: add a new --restore-from-keys option

It is similar in use to --restore-from-view-key, but also expects
a spend private key.

Requested by luigi1112, and useful to restore MyMonero wallets.

src/cryptonote_core/account.cpp

@@ -93,9 +93,10 @@ DISABLE_VS_WARNINGS(4244 4345)
     return first;
   }
   //-----------------------------------------------------------------
-  void account_base::create_from_viewkey(const cryptonote::account_public_address& address, const crypto::secret_key& viewkey)
+  void account_base::create_from_keys(const cryptonote::account_public_address& address, const crypto::secret_key& spendkey, const crypto::secret_key& viewkey)
   {
     m_keys.m_account_address = address;
+    m_keys.m_spend_secret_key = spendkey;
     m_keys.m_view_secret_key = viewkey;
 
     struct tm timestamp;
@@ -109,6 +110,13 @@ DISABLE_VS_WARNINGS(4244 4345)
     m_creation_timestamp = mktime(&timestamp);
   }
   //-----------------------------------------------------------------
+  void account_base::create_from_viewkey(const cryptonote::account_public_address& address, const crypto::secret_key& viewkey)
+  {
+    crypto::secret_key fake;
+    memset(&fake, 0, sizeof(fake));
+    create_from_keys(address, fake, viewkey);
+  }
+  //-----------------------------------------------------------------
   const account_keys& account_base::get_keys() const
   {
     return m_keys;

src/cryptonote_core/account.h

@@ -58,6 +58,7 @@ namespace cryptonote
   public:
     account_base();
     crypto::secret_key generate(const crypto::secret_key& recovery_key = crypto::secret_key(), bool recover = false, bool two_random = false);
+    void create_from_keys(const cryptonote::account_public_address& address, const crypto::secret_key& spendkey, const crypto::secret_key& viewkey);
     void create_from_viewkey(const cryptonote::account_public_address& address, const crypto::secret_key& viewkey);
     const account_keys& get_keys() const;
     std::string get_public_address_str(bool testnet) const;

src/simplewallet/simplewallet.cpp

@@ -82,6 +82,7 @@ namespace
   const command_line::arg_descriptor<std::string> arg_wallet_file = {"wallet-file", sw::tr("Use wallet <arg>"), ""};
   const command_line::arg_descriptor<std::string> arg_generate_new_wallet = {"generate-new-wallet", sw::tr("Generate new wallet and save it to <arg> or <address>.wallet by default"), ""};
   const command_line::arg_descriptor<std::string> arg_generate_from_view_key = {"generate-from-view-key", sw::tr("Generate incoming-only wallet from (address:viewkey:filename) and save it to <filename>"), ""};
+  const command_line::arg_descriptor<std::string> arg_generate_from_keys = {"generate-from-keys", sw::tr("Generate wallet from (address:spendkey:viewkey:filename) and save it to <filename>"), ""};
   const command_line::arg_descriptor<std::string> arg_daemon_address = {"daemon-address", sw::tr("Use daemon instance at <host>:<port>"), ""};
   const command_line::arg_descriptor<std::string> arg_daemon_host = {"daemon-host", sw::tr("Use daemon instance at host <arg> instead of localhost"), ""};
   const command_line::arg_descriptor<std::string> arg_password = {"password", sw::tr("Wallet password"), "", true};
@@ -716,7 +717,7 @@ bool simple_wallet::ask_wallet_create_if_needed()
   // add logic to error out if new wallet requested but named wallet file exists
   if (keys_file_exists || wallet_file_exists)
   {
-    if (!m_generate_new.empty() || m_restore_deterministic_wallet || !m_generate_from_view_key.empty())
+    if (!m_generate_new.empty() || m_restore_deterministic_wallet || !m_generate_from_view_key.empty() || !m_generate_from_keys.empty())
     {
       fail_msg_writer() << tr("attempting to generate or restore wallet, but specified file(s) exist.  Exiting to not risk overwriting.");
       return false;
@@ -772,12 +773,12 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
     return false;
   }
 
-  if((!m_generate_new.empty()) + (!m_wallet_file.empty()) + (!m_generate_from_view_key.empty()) > 1)
+  if((!m_generate_new.empty()) + (!m_wallet_file.empty()) + (!m_generate_from_view_key.empty()) + (!m_generate_from_keys.empty()) > 1)
   {
-    fail_msg_writer() << tr("can't specify more than one of --generate-new-wallet=\"wallet_name\", --wallet-file=\"wallet_name\" and --generate-from-view-key");
+    fail_msg_writer() << tr("can't specify more than one of --generate-new-wallet=\"wallet_name\", --wallet-file=\"wallet_name\", --generate-from-view-key and --generate-from-keys");
     return false;
   }
-  else if (m_generate_new.empty() && m_wallet_file.empty() && m_generate_from_view_key.empty())
+  else if (m_generate_new.empty() && m_wallet_file.empty() && m_generate_from_view_key.empty() && m_generate_from_keys.empty())
   {
     if(!ask_wallet_create_if_needed()) return false;
   }
@@ -832,7 +833,7 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
     }
   }
 
-  if (!m_generate_new.empty() || m_restore_deterministic_wallet || !m_generate_from_view_key.empty())
+  if (!m_generate_new.empty() || m_restore_deterministic_wallet || !m_generate_from_view_key.empty() || !m_generate_from_keys.empty())
   {
     if (m_wallet_file.empty()) m_wallet_file = m_generate_new;  // alias for simplicity later
 
@@ -911,6 +912,72 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
       bool r = new_wallet(m_wallet_file, pwd_container.password(), address, viewkey, testnet);
       CHECK_AND_ASSERT_MES(r, false, tr("account creation failed"));
     }
+    else if (!m_generate_from_keys.empty())
+    {
+      // split address:spendkey:viewkey:filename triple
+      std::vector<std::string> parts;
+      boost::split(parts,m_generate_from_keys, boost::is_any_of(":"));
+      if (parts.size() < 4)
+      {
+        fail_msg_writer() << tr("--generate-from-keys needs a address:spendkey:viewkey:filename quadruplet");
+        return false;
+      }
+
+      // parse address
+      cryptonote::account_public_address address;
+      bool has_payment_id;
+      crypto::hash8 new_payment_id;
+      if(!get_account_integrated_address_from_str(address, has_payment_id, new_payment_id, testnet, parts[0]))
+      {
+          fail_msg_writer() << tr("failed to parse address");
+          return false;
+      }
+
+      // parse spend secret key
+      cryptonote::blobdata spendkey_data;
+      if(!epee::string_tools::parse_hexstr_to_binbuff(parts[1], spendkey_data))
+      {
+        fail_msg_writer() << tr("failed to parse spend key secret key");
+        return false;
+      }
+      crypto::secret_key spendkey = *reinterpret_cast<const crypto::secret_key*>(spendkey_data.data());
+
+      // parse view secret key
+      cryptonote::blobdata viewkey_data;
+      if(!epee::string_tools::parse_hexstr_to_binbuff(parts[2], viewkey_data))
+      {
+        fail_msg_writer() << tr("failed to parse view key secret key");
+        return false;
+      }
+      crypto::secret_key viewkey = *reinterpret_cast<const crypto::secret_key*>(viewkey_data.data());
+
+      // parse filename
+      m_wallet_file = parts[3];
+      for (size_t n = 4; n < parts.size(); ++n)
+        m_wallet_file += std::string(":") + parts[n];
+
+      // check the spend and view keys match the given address
+      crypto::public_key pkey;
+      if (!crypto::secret_key_to_public_key(spendkey, pkey)) {
+        fail_msg_writer() << tr("failed to verify spend key secret key");
+        return false;
+      }
+      if (address.m_spend_public_key != pkey) {
+        fail_msg_writer() << tr("spend key does not match standard address");
+        return false;
+      }
+      if (!crypto::secret_key_to_public_key(viewkey, pkey)) {
+        fail_msg_writer() << tr("failed to verify view key secret key");
+        return false;
+      }
+      if (address.m_view_public_key != pkey) {
+        fail_msg_writer() << tr("view key does not match standard address");
+        return false;
+      }
+
+      bool r = new_wallet(m_wallet_file, pwd_container.password(), address, spendkey, viewkey, testnet);
+      CHECK_AND_ASSERT_MES(r, false, tr("account creation failed"));
+    }
     else
     {
       bool r = new_wallet(m_wallet_file, pwd_container.password(), m_recovery_key, m_restore_deterministic_wallet,
@@ -940,6 +1007,7 @@ bool simple_wallet::handle_command_line(const boost::program_options::variables_
   m_wallet_file                   = command_line::get_arg(vm, arg_wallet_file);
   m_generate_new                  = command_line::get_arg(vm, arg_generate_new_wallet);
   m_generate_from_view_key        = command_line::get_arg(vm, arg_generate_from_view_key);
+  m_generate_from_keys            = command_line::get_arg(vm, arg_generate_from_keys);
   m_daemon_address                = command_line::get_arg(vm, arg_daemon_address);
   m_daemon_host                   = command_line::get_arg(vm, arg_daemon_host);
   m_daemon_port                   = command_line::get_arg(vm, arg_daemon_port);
@@ -1098,6 +1166,31 @@ bool simple_wallet::new_wallet(const std::string &wallet_file, const std::string
   return true;
 }
 //----------------------------------------------------------------------------------------------------
+bool simple_wallet::new_wallet(const std::string &wallet_file, const std::string& password, const cryptonote::account_public_address& address,
+  const crypto::secret_key& spendkey, const crypto::secret_key& viewkey, bool testnet)
+{
+  m_wallet_file = wallet_file;
+
+  m_wallet.reset(new tools::wallet2(testnet));
+  m_wallet->callback(this);
+
+  try
+  {
+    m_wallet->generate(wallet_file, password, address, spendkey, viewkey);
+    message_writer(epee::log_space::console_color_white, true) << tr("Generated new wallet: ")
+      << m_wallet->get_account().get_public_address_str(m_wallet->testnet());
+  }
+  catch (const std::exception& e)
+  {
+    fail_msg_writer() << tr("failed to generate new wallet: ") << e.what();
+    return false;
+  }
+
+  m_wallet->init(m_daemon_address);
+
+  return true;
+}
+//----------------------------------------------------------------------------------------------------
 bool simple_wallet::open_wallet(const string &wallet_file, const std::string& password, bool testnet)
 {
   if (!tools::wallet2::wallet_valid_path_format(wallet_file))
@@ -2466,6 +2559,7 @@ int main(int argc, char* argv[])
   command_line::add_arg(desc_params, arg_wallet_file);
   command_line::add_arg(desc_params, arg_generate_new_wallet);
   command_line::add_arg(desc_params, arg_generate_from_view_key);
+  command_line::add_arg(desc_params, arg_generate_from_keys);
   command_line::add_arg(desc_params, arg_password);
   command_line::add_arg(desc_params, arg_password_file);
   command_line::add_arg(desc_params, arg_daemon_address);

src/simplewallet/simplewallet.h

@@ -82,6 +82,8 @@ namespace cryptonote
 
     bool new_wallet(const std::string &wallet_file, const std::string& password, const crypto::secret_key& recovery_key,
         bool recover, bool two_random, bool testnet, const std::string &old_language);
+    bool new_wallet(const std::string &wallet_file, const std::string& password, const cryptonote::account_public_address& address,
+        const crypto::secret_key& spendkey, const crypto::secret_key& viewkey, bool testnet);
     bool new_wallet(const std::string &wallet_file, const std::string& password, const cryptonote::account_public_address& address,
         const crypto::secret_key& viewkey, bool testnet);
     bool open_wallet(const std::string &wallet_file, const std::string& password, bool testnet);
@@ -218,6 +220,7 @@ namespace cryptonote
     std::string m_wallet_file;
     std::string m_generate_new;
     std::string m_generate_from_view_key;
+    std::string m_generate_from_keys;
     std::string m_import_path;
 
     std::string m_electrum_seed;  // electrum-style seed parameter

src/wallet/wallet2.cpp

@@ -1185,6 +1185,41 @@ void wallet2::generate(const std::string& wallet_, const std::string& password,
   store();
 }
 
+/*!
+* \brief Creates a wallet from a public address and a spend/view secret key pair.
+* \param  wallet_        Name of wallet file
+* \param  password       Password of wallet file
+* \param  spendkey       spend secret key
+* \param  viewkey        view secret key
+*/
+void wallet2::generate(const std::string& wallet_, const std::string& password,
+  const cryptonote::account_public_address &account_public_address,
+  const crypto::secret_key& spendkey, const crypto::secret_key& viewkey)
+{
+  clear();
+  prepare_file_names(wallet_);
+
+  boost::system::error_code ignored_ec;
+  THROW_WALLET_EXCEPTION_IF(boost::filesystem::exists(m_wallet_file, ignored_ec), error::file_exists, m_wallet_file);
+  THROW_WALLET_EXCEPTION_IF(boost::filesystem::exists(m_keys_file,   ignored_ec), error::file_exists, m_keys_file);
+
+  m_account.create_from_keys(account_public_address, spendkey, viewkey);
+  m_account_public_address = account_public_address;
+  m_watch_only = false;
+
+  bool r = store_keys(m_keys_file, password, true);
+  THROW_WALLET_EXCEPTION_IF(!r, error::file_save_error, m_keys_file);
+
+  r = file_io_utils::save_string_to_file(m_wallet_file + ".address.txt", m_account.get_public_address_str(m_testnet));
+  if(!r) LOG_PRINT_RED_L0("String with address text not saved");
+
+  cryptonote::block b;
+  generate_genesis(b);
+  m_blockchain.push_back(get_block_hash(b));
+
+  store();
+}
+
 /*!
  * \brief Rewrites to the wallet file for wallet upgrade (doesn't generate key, assumes it's already there)
  * \param wallet_name Name of wallet file (should exist)

src/wallet/wallet2.h

@@ -184,6 +184,16 @@ namespace tools
     crypto::secret_key generate(const std::string& wallet, const std::string& password,
       const crypto::secret_key& recovery_param = crypto::secret_key(), bool recover = false,
       bool two_random = false);
+    /*!
+     * \brief Creates a wallet from a public address and a spend/view secret key pair.
+     * \param  wallet_        Name of wallet file
+     * \param  password       Password of wallet file
+     * \param  viewkey        view secret key
+     * \param  spendkey       spend secret key
+     */
+    void generate(const std::string& wallet, const std::string& password,
+      const cryptonote::account_public_address &account_public_address,
+      const crypto::secret_key& spendkey, const crypto::secret_key& viewkey);
     /*!
      * \brief Creates a watch only wallet from a public address and a view secret key.
      * \param  wallet_        Name of wallet file