From 9fe1f6bd898ab1a69fbce2cb9dd93fcbb60b88fd Mon Sep 17 00:00:00 2001
From: Jonas Schnelli <dev@jonasschnelli.ch>
Date: Thu, 17 Aug 2017 21:54:23 +0200
Subject: [PATCH] Add length check for CExtKey deserialization

Github-Pull: #11081
Rebased-From: 07685d1bc1b0b815c00a68a5b7b335ffa0d4d90d
Tree-SHA512: 7f6b9ca6714d059d500531eb842c1c25edfa04ecba0ea1d9a28010fced657c066cea67d2016bbaa9b96c431a05ca9c0dcf2ba301898ecf96a65a4e01aac7fae9
---
 src/key.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/key.h b/src/key.h
index 2c6f15172..151e63531 100644
--- a/src/key.h
+++ b/src/key.h
@@ -172,6 +172,8 @@ struct CExtKey {
     {
         unsigned int len = ::ReadCompactSize(s);
         unsigned char code[BIP32_EXTKEY_SIZE];
+        if (len != BIP32_EXTKEY_SIZE)
+            throw std::runtime_error("Invalid extended key size\n");
         s.read((char *)&code[0], len);
         Decode(code);
     }