Code modifications to integrate Ledger HW device into monero-wallet-cli.

The basic approach it to delegate all sensitive data (master key, secret
ephemeral key, key derivation, ....) and related operations to the device.
As device has low memory, it does not keep itself the values
(except for view/spend keys) but once computed there are encrypted (with AES
are equivalent) and return back to monero-wallet-cli. When they need to be
manipulated by the device, they are decrypted on receive.

Moreover, using the client for storing the value in encrypted form limits
the modification in the client code. Those values are transfered from one
C-structure to another one as previously.

The code modification has been done with the wishes to be open to any
other hardware wallet. To achieve that a C++ class hw::Device has been
introduced. Two initial implementations are provided: the "default", which
remaps all calls to initial Monero code, and  the "Ledger", which delegates
all calls to Ledger device.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/simplewallet/simplewallet.h b/src/simplewallet/simplewallet.h
index af2f940c3..4c7818bf1 100644
--- a/src/simplewallet/simplewallet.h
+++ b/src/simplewallet/simplewallet.h
@@ -97,6 +97,7 @@ namespace cryptonote
         const boost::optional<crypto::secret_key>& spendkey, const crypto::secret_key& viewkey);
     bool new_wallet(const boost::program_options::variables_map& vm,
         const std::string &multisig_keys, const std::string &old_language);
+    bool new_wallet(const boost::program_options::variables_map& vm, const std::string& device_name);
     bool open_wallet(const boost::program_options::variables_map& vm);
     bool close_wallet();
 
@@ -303,6 +304,7 @@ namespace cryptonote
   private:
     std::string m_wallet_file;
     std::string m_generate_new;
+    std::string m_generate_from_device;
     std::string m_generate_from_view_key;
     std::string m_generate_from_spend_key;
     std::string m_generate_from_keys;