trezor: adapt to new passphrase mechanism

- choice where to enter passphrase is now made on the host
- use wipeable string in the comm stack
- wipe passphrase memory
- protocol optimizations, prepare for new firmware version
- minor fixes and improvements
- tests fixes, HF12 support

4 files changed, 15 insertions, 9 deletions

diff --git a/src/wallet/api/wallet.cpp b/src/wallet/api/wallet.cpp
index 4612b0397..d89261c64 100644
--- a/src/wallet/api/wallet.cpp
+++ b/src/wallet/api/wallet.cpp
@@ -267,13 +267,15 @@ struct Wallet2CallbackImpl : public tools::i_wallet2_callback
       return boost::none;
     }
 
-    virtual boost::optional<epee::wipeable_string> on_device_passphrase_request(bool on_device)
+    virtual boost::optional<epee::wipeable_string> on_device_passphrase_request(bool & on_device)
     {
       if (m_listener) {
         auto passphrase = m_listener->onDevicePassphraseRequest(on_device);
-        if (!on_device && passphrase) {
+        if (passphrase) {
           return boost::make_optional(epee::wipeable_string((*passphrase).data(), (*passphrase).size()));
         }
+      } else {
+        on_device = true;
       }
       return boost::none;
     }
diff --git a/src/wallet/api/wallet2_api.h b/src/wallet/api/wallet2_api.h
index 09c64106e..bfaae2733 100644
--- a/src/wallet/api/wallet2_api.h
+++ b/src/wallet/api/wallet2_api.h
@@ -400,8 +400,8 @@ struct WalletListener
     /**
      * @brief called by device when passphrase entry is needed
      */
-    virtual optional<std::string> onDevicePassphraseRequest(bool on_device) {
-        if (!on_device) throw std::runtime_error("Not supported");
+    virtual optional<std::string> onDevicePassphraseRequest(bool & on_device) {
+        on_device = true;
         return optional<std::string>();
     }
 
diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index bc8219c69..5935d954f 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -1109,10 +1109,12 @@ boost::optional<epee::wipeable_string> wallet_device_callback::on_pin_request()
   return boost::none;
 }
 
-boost::optional<epee::wipeable_string> wallet_device_callback::on_passphrase_request(bool on_device)
+boost::optional<epee::wipeable_string> wallet_device_callback::on_passphrase_request(bool & on_device)
 {
   if (wallet)
     return wallet->on_device_passphrase_request(on_device);
+  else
+    on_device = true;
   return boost::none;
 }
 
@@ -13547,10 +13549,12 @@ boost::optional<epee::wipeable_string> wallet2::on_device_pin_request()
   return boost::none;
 }
 //----------------------------------------------------------------------------------------------------
-boost::optional<epee::wipeable_string> wallet2::on_device_passphrase_request(bool on_device)
+boost::optional<epee::wipeable_string> wallet2::on_device_passphrase_request(bool & on_device)
 {
   if (nullptr != m_callback)
     return m_callback->on_device_passphrase_request(on_device);
+  else
+    on_device = true;
   return boost::none;
 }
 //----------------------------------------------------------------------------------------------------
diff --git a/src/wallet/wallet2.h b/src/wallet/wallet2.h
index 7620d09d8..4a0b422ce 100644
--- a/src/wallet/wallet2.h
+++ b/src/wallet/wallet2.h
@@ -145,7 +145,7 @@ private:
     virtual void on_device_button_request(uint64_t code) {}
     virtual void on_device_button_pressed() {}
     virtual boost::optional<epee::wipeable_string> on_device_pin_request() { return boost::none; }
-    virtual boost::optional<epee::wipeable_string> on_device_passphrase_request(bool on_device) { return boost::none; }
+    virtual boost::optional<epee::wipeable_string> on_device_passphrase_request(bool & on_device) { on_device = true; return boost::none; }
     virtual void on_device_progress(const hw::device_progress& event) {};
     // Common callbacks
     virtual void on_pool_tx_removed(const crypto::hash &txid) {}
@@ -159,7 +159,7 @@ private:
     void on_button_request(uint64_t code=0) override;
     void on_button_pressed() override;
     boost::optional<epee::wipeable_string> on_pin_request() override;
-    boost::optional<epee::wipeable_string> on_passphrase_request(bool on_device) override;
+    boost::optional<epee::wipeable_string> on_passphrase_request(bool & on_device) override;
     void on_progress(const hw::device_progress& event) override;
   private:
     wallet2 * wallet;
@@ -1487,7 +1487,7 @@ private:
     void on_device_button_request(uint64_t code);
     void on_device_button_pressed();
     boost::optional<epee::wipeable_string> on_device_pin_request();
-    boost::optional<epee::wipeable_string> on_device_passphrase_request(bool on_device);
+    boost::optional<epee::wipeable_string> on_device_passphrase_request(bool & on_device);
     void on_device_progress(const hw::device_progress& event);
 
     std::string get_rpc_status(const std::string &s) const;