From 88761e9e2c9a80c3a6dd0f37512bdd98d1028400 Mon Sep 17 00:00:00 2001
From: Luke Dashjr <luke-jr+git@utopios.org>
Date: Mon, 18 Aug 2014 14:51:58 +0000
Subject: [PATCH] b58check: Check binsz is long enough for checksum

---
 base58.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/base58.c b/base58.c
index 93f9358..768390f 100644
--- a/base58.c
+++ b/base58.c
@@ -102,6 +102,8 @@ int b58check(const void *bin, size_t binsz, const char *base58str, size_t b58sz)
 	unsigned char buf[32];
 	const uint8_t *binc = bin;
 	unsigned i;
+	if (binsz < 4)
+		return -4;
 	if (!my_dblsha256(buf, bin, binsz - 4))
 		return -2;
 	if (memcmp(&binc[binsz - 4], buf, 4))