From d2d0fd02fadfc38dc86444faafe07ab92369a12b Mon Sep 17 00:00:00 2001
From: Mark Friedenbach <mark@friedenbach.org>
Date: Fri, 10 Mar 2017 04:39:34 -0800
Subject: [PATCH] CT: Don't assume size of a serialized pubkey (removes a magic
 number).

---
 src/blind.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/blind.cpp b/src/blind.cpp
index 367e6566ea..7d92deea9d 100644
--- a/src/blind.cpp
+++ b/src/blind.cpp
@@ -217,8 +217,9 @@ int BlindOutputs(std::vector<uint256 >& input_blinding_factors, const std::vecto
             CKey ephemeral_key;
             ephemeral_key.MakeNewKey(true);
             CPubKey ephemeral_pubkey = ephemeral_key.GetPubKey();
-            out.nNonce.vchCommitment.resize(33);
-            memcpy(&out.nNonce.vchCommitment[0], &ephemeral_pubkey[0], 33);
+            assert(ephemeral_pubkey.size() == CConfidentialNonce::nCommittedSize);
+            out.nNonce.vchCommitment.resize(ephemeral_pubkey.size());
+            memcpy(&out.nNonce.vchCommitment[0], &ephemeral_pubkey[0], ephemeral_pubkey.size());
             // Generate nonce
             uint256 nonce = ephemeral_key.ECDH(output_pubkeys[nOut]);
             CSHA256().Write(nonce.begin(), 32).Finalize(nonce.begin());