Nuke Device

releases/Next-ChangeLog.md

@@ -8,6 +8,7 @@ This lists the new changes that have not yet been published in a normal release.
   Navigate to `Advanced/Tools -> Export Wallet -> Key Expression`
 - New Feature: Support for v3 transactions
 - New Feature: Send keystrokes with all derived BIP-85 secrets
+- New Feature: Nuke Device. Purge device data and make it an e-waste.
 - Enhancement: CCC allow to reset block height
 - Bugfix: Replace `/` with `-` in exported file names of multisig wallet export artifacts
 

shared/actions.py

@@ -1547,6 +1547,20 @@ Does not affect MicroSD card, if any.''', confirm_key="4"):
     from files import wipe_flash_filesystem
     wipe_flash_filesystem()
 
+async def nuke_device(*a):
+    if not await ux_confirm("Wipe Seed & Brick device? This will wipe the seed, purge"
+                            "all related settings, and makes ewaste from this device."):
+        return
+
+    if not await ux_confirm("Brick device?\n\nBy design, there is no way to reset or recover"
+                            " the secure element, and its contents become forever inaccessible.",
+                            confirm_key="1"):
+        return
+
+    import callgate
+    callgate.fast_brick()
+    # NOT REACHED
+
 async def wipe_vdisk(*A):
     if not await ux_confirm('''\
 Erases and reformats shared RAM disk. This is a secure erase that blanks every byte.'''):

shared/flow.py

@@ -367,6 +367,7 @@ correctly- crafted transactions signed on Testnet could be broadcast on Mainnet.
     MenuItem('MCU Key Slots', f=show_mcu_keys_left),
     MenuItem('Bless Firmware', f=bless_flash),          # no need for this anymore?
     MenuItem("Wipe LFS", f=wipe_filesystem),    # kills other-seed settings, HSM stuff, addr cache
+    MenuItem("Nuke Device", f=nuke_device),
 ]
 
 BackupStuffMenu = [

shared/seed.py

@@ -823,12 +823,6 @@ def clear_seed():
     callgate.fast_wipe(True)
     # NOT REACHED
 
-    utime.sleep(1)
-
-    # security: need to reboot to really be sure to clear the secrets from main memory.
-    from machine import reset
-    reset()
-
 async def word_quiz(words, limited=None, title='Word %d is?'):
     # Perform a test, to check they wrote them down
     # Return X if they cancel early.