python: support for multi-mnemonic load_device

python/trezorctl

@@ -417,7 +417,7 @@ def wipe_device(connect, bootloader):
 
 
 @cli.command(help="Load custom configuration to the device.")
-@click.option("-m", "--mnemonic")
+@click.option("-m", "--mnemonic", multiple=True)
 @click.option("-e", "--expand", is_flag=True)
 @click.option("-x", "--xprv")
 @click.option("-p", "--pin", default="")
@@ -437,31 +437,31 @@ def load_device(
     ignore_checksum,
     slip0014,
 ):
-    if not mnemonic and not xprv and not slip0014:
-        raise tools.CallException(
-            proto.FailureType.DataError, "Please provide mnemonic or xprv"
-        )
+    n_args = sum(bool(a) for a in (mnemonic, xprv, slip0014))
+    if n_args == 0:
+        raise click.ClickException("Please provide a mnemonic or xprv")
+    if n_args > 1:
+        raise click.ClickException("Cannot use mnemonic and xprv together")
 
     client = connect()
-    if mnemonic:
-        return debuglink.load_device_by_mnemonic(
-            client,
-            mnemonic,
-            pin,
-            passphrase_protection,
-            label,
-            "english",
-            ignore_checksum,
-            expand,
-        )
+
     if xprv:
         return debuglink.load_device_by_xprv(
             client, xprv, pin, passphrase_protection, label, "english"
         )
+
     if slip0014:
-        return debuglink.load_device_by_mnemonic(
-            client, " ".join(["all"] * 12), pin, passphrase_protection, "SLIP-0014"
-        )
+        mnemonic = [" ".join(["all"] * 12)]
+
+    return debuglink.load_device_by_mnemonic(
+        client,
+        list(mnemonic),
+        pin,
+        passphrase_protection,
+        label,
+        "english",
+        ignore_checksum,
+    )
 
 
 @cli.command(help="Start safe recovery workflow.")

python/trezorlib/debuglink.py

@@ -408,21 +408,11 @@ def load_device_by_mnemonic(
     label,
     language="english",
     skip_checksum=False,
-    expand=False,
 ):
-    # Convert mnemonic to UTF8 NKFD
-    mnemonic = Mnemonic.normalize_string(mnemonic)
+    if not isinstance(mnemonic, (list, tuple)):
+        mnemonic = [mnemonic]
 
-    # Convert mnemonic to ASCII stream
-    mnemonic = mnemonic.encode()
-
-    m = Mnemonic("english")
-
-    if expand:
-        mnemonic = m.expand(mnemonic)
-
-    if not skip_checksum and not m.check(mnemonic):
-        raise ValueError("Invalid mnemonic checksum")
+    mnemonics = [Mnemonic.normalize_string(m) for m in mnemonic]
 
     if client.features.initialized:
         raise RuntimeError(
@@ -431,7 +421,7 @@ def load_device_by_mnemonic(
 
     resp = client.call(
         proto.LoadDevice(
-            mnemonic=mnemonic,
+            mnemonics=mnemonics,
             pin=pin,
             passphrase_protection=passphrase_protection,
             language=language,