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, 11 insertions, 0 deletions

diff --git a/src/cryptonote_basic/account.h b/src/cryptonote_basic/account.h
index 79601f99c..d734599a3 100644
--- a/src/cryptonote_basic/account.h
+++ b/src/cryptonote_basic/account.h
@@ -33,6 +33,7 @@
 #include "cryptonote_basic.h"
 #include "crypto/crypto.h"
 #include "serialization/keyvalue_serialization.h"
+#include "device/device_declare.hpp"
 
 namespace cryptonote
 {
@@ -43,6 +44,7 @@ namespace cryptonote
     crypto::secret_key   m_spend_secret_key;
     crypto::secret_key   m_view_secret_key;
     std::vector<crypto::secret_key> m_multisig_keys;
+    hw::device *m_device = &hw::get_device("default");
 
     BEGIN_KV_SERIALIZE_MAP()
       KV_SERIALIZE(m_account_address)
@@ -50,6 +52,11 @@ namespace cryptonote
       KV_SERIALIZE_VAL_POD_AS_BLOB_FORCE(m_view_secret_key)
       KV_SERIALIZE_CONTAINER_POD_AS_BLOB(m_multisig_keys)
     END_KV_SERIALIZE_MAP()
+
+    account_keys& operator=(account_keys const&) = default;
+
+    hw::device& get_device()  const ;
+    void set_device( hw::device &hwdev) ;
   };
 
   /************************************************************************/
@@ -60,6 +67,7 @@ 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_device(const std::string &device_name) ;
     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);
     bool make_multisig(const crypto::secret_key &view_secret_key, const crypto::secret_key &spend_secret_key, const crypto::public_key &spend_public_key, const std::vector<crypto::secret_key> &multisig_keys);
@@ -68,6 +76,9 @@ namespace cryptonote
     std::string get_public_address_str(bool testnet) const;
     std::string get_public_integrated_address_str(const crypto::hash8 &payment_id, bool testnet) const;
 
+    hw::device& get_device() const  {return m_keys.get_device();}
+    void set_device( hw::device &hwdev) {m_keys.set_device(hwdev);}
+
     uint64_t get_createtime() const { return m_creation_timestamp; }
     void set_createtime(uint64_t val) { m_creation_timestamp = val; }