From 55ff6beb7d76f89c1ae7237ba6b8ab5fa5727a14 Mon Sep 17 00:00:00 2001
From: orignal <i2porignal@yandex.ru>
Date: Fri, 5 Jun 2020 09:23:50 -0400
Subject: [PATCH] don't create ECIESx25519 again if key was not changed

---
 libi2pd_client/I2CP.cpp | 6 +++++-
 libi2pd_client/I2CP.h   | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/libi2pd_client/I2CP.cpp b/libi2pd_client/I2CP.cpp
index 5a2f0901..b0f334f5 100644
--- a/libi2pd_client/I2CP.cpp
+++ b/libi2pd_client/I2CP.cpp
@@ -60,7 +60,11 @@ namespace client
 
 	void I2CPDestination::SetECIESx25519EncryptionPrivateKey (const uint8_t * key)
 	{
-		m_ECIESx25519Decryptor = std::make_shared<i2p::crypto::ECIESX25519AEADRatchetDecryptor>(key, true); // calculate public
+		if (!m_ECIESx25519Decryptor || memcmp (m_ECIESx25519PrivateKey, key, 32)) // new key?
+		{	
+			m_ECIESx25519Decryptor = std::make_shared<i2p::crypto::ECIESX25519AEADRatchetDecryptor>(key, true); // calculate public
+			memcpy (m_ECIESx25519PrivateKey, key, 32);
+		}	
 	}	
 		
 	bool I2CPDestination::Decrypt (const uint8_t * encrypted, uint8_t * data, BN_CTX * ctx, i2p::data::CryptoKeyType preferredCrypto) const
diff --git a/libi2pd_client/I2CP.h b/libi2pd_client/I2CP.h
index db38ecdc..adb648f4 100644
--- a/libi2pd_client/I2CP.h
+++ b/libi2pd_client/I2CP.h
@@ -105,6 +105,7 @@ namespace client
 			i2p::data::CryptoKeyType m_EncryptionKeyType;
 			std::shared_ptr<i2p::crypto::CryptoKeyDecryptor> m_Decryptor; // standard
 			std::shared_ptr<i2p::crypto::ECIESX25519AEADRatchetDecryptor> m_ECIESx25519Decryptor;
+			uint8_t m_ECIESx25519PrivateKey[32];
 			uint64_t m_LeaseSetExpirationTime;
 	};