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Code Issues Releases Wiki Activity

core: clean up backup type handling in reset_device

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This commit is contained in:
matejcik 2019-09-20 18:00:14 +02:00
parent b30d9f6897
commit 03f1403c93
1 changed files with 9 additions and 12 deletions
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21
core/src/apps/management/reset_device/__init__.py
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@ -46,9 +46,17 @@ async def reset_device(ctx: wire.Context, msg: ResetDevice) -> Success:
# For SLIP-39 this is the Encrypted Master Secret
secret = _compute_secret_from_entropy(int_entropy, ext_entropy, msg.strength)
if msg.backup_type != BackupType.Bip39:
# Check backup type, perform type-specific handling
if msg.backup_type == BackupType.Bip39:
# in BIP-39 we store mnemonic string instead of the secret
secret = bip39.from_data(secret).encode()
elif msg.backup_type in (BackupType.Slip39_Basic, BackupType.Slip39_Advanced):
# generate and set SLIP39 parameters
storage.device.set_slip39_identifier(slip39.generate_random_identifier())
storage.device.set_slip39_iteration_exponent(slip39.DEFAULT_ITERATION_EXPONENT)
else:
# Unknown backup type.
raise RuntimeError
# If either of skip_backup or no_backup is specified, we are not doing backup now.
# Otherwise, we try to do it.
@ -58,17 +66,6 @@ async def reset_device(ctx: wire.Context, msg: ResetDevice) -> Success:
if perform_backup:
perform_backup = await layout.confirm_backup(ctx)
# Check backup type, convert seed accordingly
if msg.backup_type == BackupType.Bip39:
# in BIP-39 we store mnemonic string instead of the secret
secret = bip39.from_data(secret).encode()
elif msg.backup_type not in (BackupType.Slip39_Basic, BackupType.Slip39_Advanced):
# Unknown backup type.
# This check might seem superfluous, because we are checking
# in `_validate_reset_device` already, however, this is critical part,
# so just to make sure.
raise RuntimeError
# generate and display backup information for the master secret
if perform_backup:
await backup_seed(ctx, msg.backup_type, secret)