From 25d2197043bf1d7f499b7d0d20a0e4f49ffd5808 Mon Sep 17 00:00:00 2001
From: Sean Bowe <ewillbefull@gmail.com>
Date: Thu, 21 Jul 2016 18:34:59 -0600
Subject: [PATCH] Remove more from libsnark, and fix potential remote-DoS.

---
 depends/packages/libsnark.mk | 4 ++--
 src/zcash/JoinSplit.cpp      | 6 +++++-
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/depends/packages/libsnark.mk b/depends/packages/libsnark.mk
index f2c4b33d..15912f18 100644
--- a/depends/packages/libsnark.mk
+++ b/depends/packages/libsnark.mk
@@ -3,8 +3,8 @@ $(package)_version=0.1
 $(package)_download_path=https://github.com/zcash/$(package)/archive/
 $(package)_file_name=$(package)-$($(package)_git_commit).tar.gz
 $(package)_download_file=$($(package)_git_commit).tar.gz
-$(package)_sha256_hash=43b0c921e8a1d556e70cf5c63c921db54f151842eb3cada029e3b92095e7b6f9
-$(package)_git_commit=a7031481fd8d2360337321401fe8e24f0359317a
+$(package)_sha256_hash=369fe9f5a8018eb46cce3cf50bfbf21419d8e963b25067ffd00cb9ac5c39f649
+$(package)_git_commit=11242d8afe304c8bcc252baec483f04a110d1dd4
 
 $(package)_dependencies=libgmp libsodium
 
diff --git a/src/zcash/JoinSplit.cpp b/src/zcash/JoinSplit.cpp
index 2b1d48d6..0d9e789d 100644
--- a/src/zcash/JoinSplit.cpp
+++ b/src/zcash/JoinSplit.cpp
@@ -157,7 +157,11 @@ public:
             vpub_new
         );
 
-        return r1cs_ppzksnark_verifier_strong_IC<ppzksnark_ppT>(*vk, witness, r1cs_proof);
+        try {
+            return r1cs_ppzksnark_verifier_strong_IC<ppzksnark_ppT>(*vk, witness, r1cs_proof);
+        } catch (...) {
+            return false;
+        }
     }
 
     boost::array<unsigned char, ZKSNARK_PROOF_SIZE> prove(