Merge pull request #5 from LedgerHQ/y333/fix_legacy_support

Handle GET_OPERATION_MODE apdu

apdu/apdu_constants.h

@@ -30,6 +30,7 @@
 #define INS_SIGN_MESSAGE 0x4E
 #define INS_GET_FIRMWARE_VERSION 0xC4
 #define INS_GET_COIN_VER 0x16
+#define INS_GET_OPERATION_MODE 0x24
 
 #define SW_INCORRECT_LENGTH 0x6700
 #define SW_SECURITY_STATUS_NOT_SATISFIED 0x6982
@@ -61,3 +62,4 @@ unsigned short handler_get_trusted_input(buffer_t *buffer, uint8_t p1,
                                          uint8_t p2);
 unsigned short handler_get_firmware_version(void);
 unsigned short handler_get_coin_version(void);
+unsigned short handler_get_operation_mode(void);

apdu/dispatcher.c

@@ -110,6 +110,11 @@ int apdu_dispatcher(const command_t *cmd) {
 
     return handler_get_coin_version();
 
+  case INS_GET_OPERATION_MODE:
+    PRINTF("Get operation mode\n");
+
+    return handler_get_operation_mode();
+
   default:
     PRINTF("Instruction not supported\n");
     return io_send_sw(SW_INS_NOT_SUPPORTED);

handler/get_operation_mode.c

@@ -0,0 +1,38 @@
+/*******************************************************************************
+ *   Ledger App - Bitcoin Wallet
+ *   (c) 2016-2019 Ledger
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ ********************************************************************************/
+#include "io.h"
+
+#include "apdu_constants.h"
+#include "context.h"
+
+#define MODE_WALLET 0x01
+
+/*
+ * Function: handler_get_firmware_versi
+ * ---------------------------------------
+ * Retrieves the firmware version information.
+ *
+ * Returns:
+ *   - -1 if the operation is unsuccessful.
+ */
+WEAK unsigned short handler_get_operation_mode() {
+
+  G_io_apdu_buffer[0] = MODE_WALLET;
+  context.outLength = 0x01;
+
+  return io_send_response_pointer(G_io_apdu_buffer, context.outLength, SW_OK);
+}