From ae663ffe0c2ca11905069932e599cfaca262c064 Mon Sep 17 00:00:00 2001
From: Pavol Rusnak <stick@gk2.sk>
Date: Tue, 28 Nov 2017 19:59:06 +0100
Subject: [PATCH] client: don't accept non-numerical values for PIN

---
 trezorlib/client.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/trezorlib/client.py b/trezorlib/client.py
index 8cb7e89..41d2250 100644
--- a/trezorlib/client.py
+++ b/trezorlib/client.py
@@ -277,6 +277,8 @@ class TextUIMixin(object):
         log("    1 2 3")
         log("Please enter %s: " % desc)
         pin = getpass.getpass('')
+        if not pin.isdigit():
+            raise ValueError('Non-numerical PIN provided')
         return proto.PinMatrixAck(pin=pin)
 
     def callback_PassphraseRequest(self, msg):