* Regenerate keys with public key matching user defined first byte

examples/simple_repeater/MyMesh.cpp

@@ -807,6 +807,18 @@ void MyMesh::clearStats() {
   ((SimpleMeshTables *)getTables())->resetStats();
 }
 
+void MyMesh::regenerateKeys(uint8_t byte) { 
+  if (byte >0 && byte < 0xff){
+    MESH_DEBUG_PRINTLN("Generating new keypair");
+    mesh::LocalIdentity new_id = radio_new_identity();
+    
+    while (new_id.pub_key[0] != byte) {
+      new_id = radio_new_identity();
+    }
+    saveIdentity(new_id);
+  }
+}
+
 void MyMesh::handleCommand(uint32_t sender_timestamp, char *command, char *reply) {
   while (*command == ' ')
     command++; // skip leading spaces

examples/simple_repeater/MyMesh.h

@@ -188,6 +188,7 @@ public:
 
   void saveIdentity(const mesh::LocalIdentity& new_id) override;
   void clearStats() override;
+  void regenerateKeys(uint8_t byte);  
   void handleCommand(uint32_t sender_timestamp, char* command, char* reply);
   void loop();
 

src/helpers/CommonCLI.cpp

@@ -245,6 +245,29 @@ void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, ch
     } else if (memcmp(command, "clear stats", 11) == 0) {
       _callbacks->clearStats();
       strcpy(reply, "(OK - stats reset)");
+    } else if (memcmp(command, "regeneratekeys ", 15) == 0) {
+      // Parse first hex digit
+      int value = 0;
+      if (command[15] >= '0' && command[15] <= '9')
+          value = (command[15] - '0') << 4;
+      else if (command[15] >= 'a' && command[15] <= 'f')
+          value = (command[15] - 'a' + 10) << 4;
+      else if (command[15] >= 'A' && command[15] <= 'F')
+          value = (command[15] - 'A' + 10) << 4;
+      // Parse second hex digit
+      if (command[16] >= '0' && command[16] <= '9')
+          value |= (command[16] - '0');
+      else if (command[16] >= 'a' && command[16] <= 'f')
+          value |= (command[16] - 'a' + 10);
+      else if (command[16] >= 'A' && command[16] <= 'F')
+          value |= (command[16] - 'A' + 10);
+      // regenerate key pair
+      MESH_DEBUG_PRINTLN("Generating new keypair");
+      if ((value > 0) && (value < 0xff)){
+        _callbacks->regenerateKeys(value);
+        _board->reboot();  // doesn't return
+      }
+      sprintf(reply, "> ERROR");
     /*
      * GET commands
      */

src/helpers/CommonCLI.h

@@ -69,6 +69,7 @@ public:
   virtual mesh::LocalIdentity& getSelfId() = 0;
   virtual void saveIdentity(const mesh::LocalIdentity& new_id) = 0;
   virtual void clearStats() = 0;
+  virtual void regenerateKeys(uint8_t byte) = 0; 
   virtual void applyTempRadioParams(float freq, float bw, uint8_t sf, uint8_t cr, int timeout_mins) = 0;
 
   virtual void setBridgeState(bool enable) {