ledger support for hf 15 (BP+, view tags)

src/cryptonote_basic/cryptonote_format_utils.cpp

@@ -989,7 +989,7 @@ namespace cryptonote
     return true;
   }
   //---------------------------------------------------------------
-  bool out_can_be_to_acc(const boost::optional<crypto::view_tag>& view_tag_opt, const crypto::key_derivation& derivation, const size_t output_index)
+  bool out_can_be_to_acc(const boost::optional<crypto::view_tag>& view_tag_opt, const crypto::key_derivation& derivation, const size_t output_index, hw::device* hwdev)
   {
     // If there is no view tag to check, the output can possibly belong to the account.
     // Will need to derive the output pub key to be certain whether or not the output belongs to the account.
@@ -1002,7 +1002,15 @@ namespace cryptonote
     // Therefore can fail out early to avoid expensive crypto ops needlessly deriving output public key to
     // determine if output belongs to the account.
     crypto::view_tag derived_view_tag;
-    crypto::derive_view_tag(derivation, output_index, derived_view_tag);
+    if (hwdev != nullptr)
+    {
+      bool r = hwdev->derive_view_tag(derivation, output_index, derived_view_tag);
+      CHECK_AND_ASSERT_MES(r, false, "Failed to derive view tag");
+    }
+    else
+    {
+      crypto::derive_view_tag(derivation, output_index, derived_view_tag);
+    }
     return view_tag == derived_view_tag;
   }
   //---------------------------------------------------------------
@@ -1012,7 +1020,7 @@ namespace cryptonote
     bool r = acc.get_device().generate_key_derivation(tx_pub_key, acc.m_view_secret_key, derivation);
     CHECK_AND_ASSERT_MES(r, false, "Failed to generate key derivation");
     crypto::public_key pk;
-    if (out_can_be_to_acc(view_tag_opt, derivation, output_index))
+    if (out_can_be_to_acc(view_tag_opt, derivation, output_index, &acc.get_device()))
     {
       r = acc.get_device().derive_public_key(derivation, output_index, acc.m_account_address.m_spend_public_key, pk);
       CHECK_AND_ASSERT_MES(r, false, "Failed to derive public key");
@@ -1026,7 +1034,7 @@ namespace cryptonote
       CHECK_AND_ASSERT_MES(output_index < additional_tx_pub_keys.size(), false, "wrong number of additional tx pubkeys");
       r = acc.get_device().generate_key_derivation(additional_tx_pub_keys[output_index], acc.m_view_secret_key, derivation);
       CHECK_AND_ASSERT_MES(r, false, "Failed to generate key derivation");
-      if (out_can_be_to_acc(view_tag_opt, derivation, output_index))
+      if (out_can_be_to_acc(view_tag_opt, derivation, output_index, &acc.get_device()))
       {
         r = acc.get_device().derive_public_key(derivation, output_index, acc.m_account_address.m_spend_public_key, pk);
         CHECK_AND_ASSERT_MES(r, false, "Failed to derive public key");
@@ -1040,7 +1048,7 @@ namespace cryptonote
   {
     // try the shared tx pubkey
     crypto::public_key subaddress_spendkey;
-    if (out_can_be_to_acc(view_tag_opt, derivation, output_index))
+    if (out_can_be_to_acc(view_tag_opt, derivation, output_index, &hwdev))
     {
       CHECK_AND_ASSERT_MES(hwdev.derive_subaddress_public_key(out_key, derivation, output_index, subaddress_spendkey), boost::none, "Failed to derive subaddress public key");
       auto found = subaddresses.find(subaddress_spendkey);
@@ -1052,7 +1060,7 @@ namespace cryptonote
     if (!additional_derivations.empty())
     {
       CHECK_AND_ASSERT_MES(output_index < additional_derivations.size(), boost::none, "wrong number of additional derivations");
-      if (out_can_be_to_acc(view_tag_opt, additional_derivations[output_index], output_index))
+      if (out_can_be_to_acc(view_tag_opt, additional_derivations[output_index], output_index, &hwdev))
       {
         CHECK_AND_ASSERT_MES(hwdev.derive_subaddress_public_key(out_key, additional_derivations[output_index], output_index, subaddress_spendkey), boost::none, "Failed to derive subaddress public key");
         auto found = subaddresses.find(subaddress_spendkey);

src/cryptonote_basic/cryptonote_format_utils.h

@@ -91,7 +91,7 @@ namespace cryptonote
   bool get_encrypted_payment_id_from_tx_extra_nonce(const blobdata& extra_nonce, crypto::hash8& payment_id);
   void set_tx_out(const uint64_t amount, const crypto::public_key& output_public_key, const bool use_view_tags, const crypto::view_tag& view_tag, tx_out& out);
   bool check_output_types(const transaction& tx, const uint8_t hf_version);
-  bool out_can_be_to_acc(const boost::optional<crypto::view_tag>& view_tag_opt, const crypto::key_derivation& derivation, const size_t output_index);
+  bool out_can_be_to_acc(const boost::optional<crypto::view_tag>& view_tag_opt, const crypto::key_derivation& derivation, const size_t output_index, hw::device *hwdev = nullptr);
   bool is_out_to_acc(const account_keys& acc, const crypto::public_key& output_public_key, const crypto::public_key& tx_pub_key, const std::vector<crypto::public_key>& additional_tx_public_keys, size_t output_index, const boost::optional<crypto::view_tag>& view_tag_opt = boost::optional<crypto::view_tag>());
   struct subaddress_receive_info
   {

src/device/device.hpp

@@ -177,6 +177,7 @@ namespace hw {
         virtual bool  derive_public_key(const crypto::key_derivation &derivation, const std::size_t output_index, const crypto::public_key &pub,  crypto::public_key &derived_pub) = 0;
         virtual bool  secret_key_to_public_key(const crypto::secret_key &sec, crypto::public_key &pub) = 0;
         virtual bool  generate_key_image(const crypto::public_key &pub, const crypto::secret_key &sec, crypto::key_image &image) = 0;
+        virtual bool  derive_view_tag(const crypto::key_derivation &derivation, const std::size_t output_index, crypto::view_tag &view_tag) = 0;
 
         // alternative prototypes available in libringct
         rct::key scalarmultKey(const rct::key &P, const rct::key &a)

src/device/device_default.hpp

@@ -101,7 +101,7 @@ namespace hw {
             bool  derive_public_key(const crypto::key_derivation &derivation, const std::size_t output_index, const crypto::public_key &pub,  crypto::public_key &derived_pub) override;
             bool  secret_key_to_public_key(const crypto::secret_key &sec, crypto::public_key &pub) override;
             bool  generate_key_image(const crypto::public_key &pub, const crypto::secret_key &sec, crypto::key_image &image) override;
-            bool  derive_view_tag(const crypto::key_derivation &derivation, const std::size_t output_index, crypto::view_tag &view_tag);
+            bool  derive_view_tag(const crypto::key_derivation &derivation, const std::size_t output_index, crypto::view_tag &view_tag) override;
 
 
             /* ======================================================================= */

src/device/device_ledger.cpp

@@ -266,6 +266,7 @@ namespace hw {
     #define INS_DERIVE_PUBLIC_KEY               0x36
     #define INS_DERIVE_SECRET_KEY               0x38
     #define INS_GEN_KEY_IMAGE                   0x3A
+    #define INS_DERIVE_VIEW_TAG                 0x3B
     #define INS_SECRET_KEY_ADD                  0x3C
     #define INS_SECRET_KEY_SUB                  0x3E
     #define INS_GENERATE_KEYPAIR                0x40
@@ -1308,6 +1309,54 @@ namespace hw {
         return true;
     }
 
+    bool device_ledger::derive_view_tag(const crypto::key_derivation &derivation, const std::size_t output_index, crypto::view_tag &view_tag){
+      #ifdef DEBUG_HWDEVICE
+      crypto::key_derivation derivation_x;
+      if ((this->mode == TRANSACTION_PARSE) && has_view_key) {
+        derivation_x = derivation;
+      } else {
+        derivation_x = hw::ledger::decrypt(derivation);
+      }
+      const std::size_t            output_index_x = output_index;
+      crypto::view_tag             view_tag_x;
+      log_hexbuffer("derive_view_tag: [[IN]]  derivation  ", derivation_x.data, 32);
+      log_message  ("derive_view_tag: [[IN]]  output_index", std::to_string(output_index_x));
+      this->controle_device->derive_view_tag(derivation_x, output_index_x, view_tag_x);
+      log_hexbuffer("derive_view_tag: [[OUT]] view_tag ", &view_tag_x.data, 1);
+      #endif
+
+      if ((this->mode == TRANSACTION_PARSE) && has_view_key) {
+        //If we are in TRANSACTION_PARSE, the given derivation has been retrieved uncrypted (wihtout the help
+        //of the device), so continue that way.
+        MDEBUG( "derive_view_tag  : PARSE mode with known viewkey");
+        crypto::derive_view_tag(derivation, output_index, view_tag);
+      } else {
+        AUTO_LOCK_CMD();
+        int offset = set_command_header_noopt(INS_DERIVE_VIEW_TAG);
+        //derivation
+        this->send_secret((unsigned char*)derivation.data, offset);
+        //index
+        this->buffer_send[offset+0] = output_index>>24;
+        this->buffer_send[offset+1] = output_index>>16;
+        this->buffer_send[offset+2] = output_index>>8;
+        this->buffer_send[offset+3] = output_index>>0;
+        offset += 4;
+
+        this->buffer_send[4] = offset-5;
+        this->length_send = offset;
+        this->exchange();
+
+        //view tag
+        memmove(&view_tag.data, &this->buffer_recv[0], 1);
+      }
+
+      #ifdef DEBUG_HWDEVICE
+      hw::ledger::check1("derive_view_tag", "view_tag", &view_tag_x.data, &view_tag.data);
+      #endif
+
+      return true;
+    }
+
     /* ======================================================================= */
     /*                               TRANSACTION                               */
     /* ======================================================================= */
@@ -1548,7 +1597,6 @@ namespace hw {
       const size_t                             output_index_x                 = output_index;
       const bool                               need_additional_txkeys_x       = need_additional_txkeys;
       const bool                               use_view_tags_x                = use_view_tags;
-      const crypto::view_tag                   view_tag_x                     = view_tag;
 
       std::vector<crypto::secret_key>    additional_tx_keys_x;
       for (const auto &k: additional_tx_keys) {
@@ -1558,6 +1606,7 @@ namespace hw {
       std::vector<crypto::public_key>          additional_tx_public_keys_x;
       std::vector<rct::key>                    amount_keys_x;
       crypto::public_key                       out_eph_public_key_x;
+      crypto::view_tag                         view_tag_x;
 
       log_message  ("generate_output_ephemeral_keys: [[IN]] tx_version", std::to_string(tx_version_x));
       //log_hexbuffer("generate_output_ephemeral_keys: [[IN]] sender_account_keys.view", sender_account_keys.m_sview_secret_key.data, 32);
@@ -1575,11 +1624,15 @@ namespace hw {
       if(need_additional_txkeys_x) {
         log_hexbuffer("generate_output_ephemeral_keys: [[IN]] additional_tx_keys[oi]", additional_tx_keys_x[output_index].data, 32);
       }
+      log_message  ("generate_output_ephemeral_keys: [[IN]] use_view_tags",  std::to_string(use_view_tags_x));
       this->controle_device->generate_output_ephemeral_keys(tx_version_x, sender_account_keys_x, txkey_pub_x, tx_key_x, dst_entr_x, change_addr_x, output_index_x, need_additional_txkeys_x,  additional_tx_keys_x,
                                                             additional_tx_public_keys_x, amount_keys_x, out_eph_public_key_x, use_view_tags_x, view_tag_x);
       if(need_additional_txkeys_x) {
         log_hexbuffer("additional_tx_public_keys_x: [[OUT]] additional_tx_public_keys_x", additional_tx_public_keys_x.back().data, 32);
       }
+      if(use_view_tags_x) {
+        log_hexbuffer("generate_output_ephemeral_keys: [[OUT]] view_tag", &view_tag_x.data, 1);
+      }
       log_hexbuffer("generate_output_ephemeral_keys: [[OUT]] amount_keys ", (char*)amount_keys_x.back().bytes, 32);
       log_hexbuffer("generate_output_ephemeral_keys: [[OUT]] out_eph_public_key ", out_eph_public_key_x.data, 32);
       #endif
@@ -1633,6 +1686,9 @@ namespace hw {
         memset(&this->buffer_send[offset], 0, 32);
         offset += 32;
       }
+      //use_view_tags
+      this->buffer_send[offset] = use_view_tags;
+      offset++;
 
       this->buffer_send[4] = offset-5;
       this->length_send = offset;
@@ -1663,6 +1719,14 @@ namespace hw {
         recv_len -= 32;
       }
 
+      if (use_view_tags)
+      {
+        ASSERT_X(recv_len>=1, "Not enough data from device");
+        memmove(&view_tag.data, &this->buffer_recv[offset], 1);
+        offset++;
+        recv_len -= 1;
+      }
+
       // add ABPkeys
       this->add_output_key_mapping(dst_entr.addr.m_view_public_key, dst_entr.addr.m_spend_public_key, dst_entr.is_subaddress, is_change,
                                    need_additional_txkeys, output_index,
@@ -1675,6 +1739,9 @@ namespace hw {
         hw::ledger::check32("generate_output_ephemeral_keys", "additional_tx_key", additional_tx_public_keys_x.back().data, additional_tx_public_keys.back().data);
       }
       hw::ledger::check32("generate_output_ephemeral_keys", "out_eph_public_key", out_eph_public_key_x.data, out_eph_public_key.data);
+      if (use_view_tags) {
+        hw::ledger::check1("generate_output_ephemeral_keys", "view_tag", &view_tag_x.data, &view_tag.data);
+      }
       #endif
 
       return true;
@@ -1860,7 +1927,7 @@ namespace hw {
 
         // ======  Aout, Bout, AKout, C, v, k ======
         kv_offset = data_offset;
-        if (type==rct::RCTTypeBulletproof2 || type==rct::RCTTypeCLSAG) {
+        if (type==rct::RCTTypeBulletproof2 || type==rct::RCTTypeCLSAG || type==rct::RCTTypeBulletproofPlus) {
           C_offset = kv_offset+ (8)*outputs_size;
         } else {
           C_offset = kv_offset+ (32+32)*outputs_size;
@@ -1877,7 +1944,7 @@ namespace hw {
           offset = set_command_header(INS_VALIDATE, 0x02, i+1);
           //options
           this->buffer_send[offset] = (i==outputs_size-1)? 0x00:0x80 ;
-          this->buffer_send[offset] |= (type==rct::RCTTypeBulletproof2 || type==rct::RCTTypeCLSAG)?0x02:0x00;
+          this->buffer_send[offset] |= (type==rct::RCTTypeBulletproof2 || type==rct::RCTTypeCLSAG || type==rct::RCTTypeBulletproofPlus)?0x02:0x00;
           offset += 1;
           //is_subaddress
           this->buffer_send[offset] = outKeys.is_subaddress;
@@ -1898,7 +1965,7 @@ namespace hw {
           memmove(this->buffer_send+offset, data+C_offset,32);
           offset += 32;
           C_offset += 32;
-          if (type==rct::RCTTypeBulletproof2 || type==rct::RCTTypeCLSAG) {
+          if (type==rct::RCTTypeBulletproof2 || type==rct::RCTTypeCLSAG || type==rct::RCTTypeBulletproofPlus) {
             //k
             memset(this->buffer_send+offset, 0, 32);
             offset += 32;

src/device/device_ledger.hpp

@@ -249,6 +249,7 @@ namespace hw {
         bool  derive_public_key(const crypto::key_derivation &derivation, const std::size_t output_index, const crypto::public_key &pub,  crypto::public_key &derived_pub) override;
         bool  secret_key_to_public_key(const crypto::secret_key &sec, crypto::public_key &pub) override;
         bool  generate_key_image(const crypto::public_key &pub, const crypto::secret_key &sec, crypto::key_image &image) override;
+        bool  derive_view_tag(const crypto::key_derivation &derivation, const size_t output_index, crypto::view_tag &view_tag) override;
 
         /* ======================================================================= */
         /*                               TRANSACTION                               */

src/device/log.cpp

@@ -165,6 +165,10 @@ namespace hw {
     void check8(const std::string &msg, const std::string &info, const char *h, const char *d, bool crypted) {
       check(msg, info, h, d, 8, crypted);
     }
+
+    void check1(const std::string &msg, const std::string &info, const char *h, const char *d, bool crypted) {
+      check(msg, info, h, d, 1, crypted);
+    }
     #endif
 
   }

src/device/log.hpp

@@ -75,6 +75,7 @@ namespace hw {
 
         void check32(const std::string &msg, const std::string &info, const char *h, const char *d, bool crypted=false);
         void check8(const std::string &msg, const std::string &info, const char *h, const char *d,  bool crypted=false);
+        void check1(const std::string &msg, const std::string &info, const char *h, const char *d,  bool crypted=false);
 
         void set_check_verbose(bool verbose);
         #endif