replace CalcuateIdentHash to identity.Hash to avoid duplication

Identity.cpp

@@ -40,13 +40,6 @@ namespace data
 		return *this;
 	}
 
-	IdentHash CalculateIdentHash (const Identity& identity)
-	{
-		IdentHash hash;
-		CryptoPP::SHA256().CalculateDigest((uint8_t *)hash, (uint8_t *)&identity, sizeof (Identity));
-		return hash;
-	}
-
 	Keys CreateRandomKeys ()
 	{
 		Keys keys;		

Identity.h

@@ -79,7 +79,6 @@ namespace data
 			uint8_t m_Hash[32];
 	};	
 
-	IdentHash CalculateIdentHash (const Identity& identity);
 	Keys CreateRandomKeys ();
 	void CreateRandomDHKeysPair (DHKeysPair * keys); // for transport sessions
 

LeaseSet.cpp

@@ -25,7 +25,7 @@ namespace data
 
 		const H * header = (const H *)buf;
 		m_Identity = header->destination;
-		m_IdentHash = CalculateIdentHash (m_Identity);
+		m_IdentHash = m_Identity.Hash();
 		memcpy (m_EncryptionKey, header->encryptionKey, 256);
 		LogPrint ("LeaseSet num=", (int)header->num);
 

RouterInfo.cpp

@@ -34,7 +34,7 @@ namespace data
 	void RouterInfo::SetRouterIdentity (const Identity& identity)
 	{	
 		m_RouterIdentity = identity;
-		m_IdentHash = CalculateIdentHash (m_RouterIdentity);
+		m_IdentHash      = m_RouterIdentity.Hash ();
 		UpdateIdentHashBase64 ();
 		UpdateRoutingKey ();
 		m_Timestamp = i2p::util::GetMillisecondsSinceEpoch ();

Streaming.cpp

@@ -345,7 +345,7 @@ namespace stream
 	StreamingDestination::StreamingDestination (): m_LeaseSet (nullptr)
 	{		
 		m_Keys = i2p::data::CreateRandomKeys ();
-		m_IdentHash = i2p::data::CalculateIdentHash (m_Keys.pub);
+		m_IdentHash = m_Keys.pub.Hash ();
 		m_SigningPrivateKey.Initialize (i2p::crypto::dsap, i2p::crypto::dsaq, i2p::crypto::dsag, 
 			CryptoPP::Integer (m_Keys.signingPrivateKey, 20));
 		CryptoPP::DH dh (i2p::crypto::elgp, i2p::crypto::elgg);