Add passphrase derivation utility

ledgerblue/derivePassphrase.py

@@ -0,0 +1,42 @@
+"""
+*******************************************************************************
+*   Ledger Blue
+*   (c) 2016 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.
+********************************************************************************
+"""
+
+from .comm import getDongle
+import argparse
+import getpass
+
+def auto_int(x):
+    return int(x, 0)
+
+parser = argparse.ArgumentParser()
+parser.add_argument("--persistent", help="Persist passphrase as secondary PIN", action='store_true')
+
+args = parser.parse_args()
+
+dongle = getDongle(False)
+
+passphrase = getpass.getpass("Enter BIP39 passphrase : ")
+if len(passphrase) != 0:
+	if args.persistent:
+		p1 = 0x02
+	else:
+		p1 = 0x01
+	apdu = bytearray([0xE0, 0xD0, p1, 0x00, len(passphrase)]) + bytearray(passphrase)
+	dongle.exchange(apdu, timeout=300)
+