From 2f9ef8fcaf1c4b9e9056616c200d60e2623a7c0b Mon Sep 17 00:00:00 2001
From: akwizgran <akwizgran@users.sourceforge.net>
Date: Sat, 22 Mar 2014 17:06:00 +0000
Subject: [PATCH] Log the running time of ECDH shared secret derivation.
---
.../src/org/briarproject/crypto/CryptoComponentImpl.java | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/briar-core/src/org/briarproject/crypto/CryptoComponentImpl.java b/briar-core/src/org/briarproject/crypto/CryptoComponentImpl.java
index 521a9cef07..22e7be9f75 100644
--- a/briar-core/src/org/briarproject/crypto/CryptoComponentImpl.java
+++ b/briar-core/src/org/briarproject/crypto/CryptoComponentImpl.java
@@ -234,9 +234,14 @@ class CryptoComponentImpl implements CryptoComponent {
throw new IllegalArgumentException();
ECPrivateKeyParameters ecPriv = ((Sec1PrivateKey) priv).getKey();
ECPublicKeyParameters ecPub = ((Sec1PublicKey) pub).getKey();
+ long now = System.currentTimeMillis();
ECDHCBasicAgreement agreement = new ECDHCBasicAgreement();
agreement.init(ecPriv);
- return agreement.calculateAgreement(ecPub).toByteArray();
+ byte[] secret = agreement.calculateAgreement(ecPub).toByteArray();
+ long duration = System.currentTimeMillis() - now;
+ if(LOG.isLoggable(INFO))
+ LOG.info("Deriving shared secret took " + duration + " ms");
+ return secret;
}
public byte[] deriveGroupSalt(byte[] secret) {
--
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