remove unused code

libdevcrypto/AES.cpp

@@ -25,39 +25,8 @@
 using namespace std;
 using namespace dev;
 using namespace dev::crypto;
-using namespace dev::crypto::aes;
 using namespace CryptoPP;
 
-struct aes::Aes128Ctr
-{
-	Aes128Ctr(h128 _k)
-	{
-		mode.SetKeyWithIV(_k.data(), sizeof(h128), Nonce::get().data());
-	}
-	CTR_Mode<AES>::Encryption mode;
-};
-
-Stream::Stream(StreamType, h128 _ckey):
-	m_cSecret(_ckey)
-{
-	cryptor = new Aes128Ctr(_ckey);
-}
-
-Stream::~Stream()
-{
-	delete cryptor;
-}
-
-void Stream::update(bytesRef)
-{
-
-}
-
-size_t Stream::streamOut(bytes&)
-{
-	return 0;
-}
-
 bytes dev::aesDecrypt(bytesConstRef _ivCipher, std::string const& _password, unsigned _rounds, bytesConstRef _salt)
 {
 	bytes pw = asBytes(_password);

libdevcrypto/AES.h

@@ -24,71 +24,11 @@
 
 #pragma once
 
-#include <atomic>
 #include "Common.h"
 
 namespace dev
 {
-namespace crypto
-{
-namespace aes
-{
-
-struct Aes128Ctr;
-enum StreamType { Encrypt, Decrypt };
-	
-/**
- * @brief Encrypted stream
- */
-class Stream
-{
-public:
-	// streamtype maybe irrelevant w/ctr
-	Stream(StreamType _t, h128 _ckey);
-	~Stream();
-	
-	virtual void update(bytesRef io_bytes);
-	
-	/// Move ciphertext to _bytes.
-	virtual size_t streamOut(bytes& o_bytes);
-	
-private:
-	Stream(Stream const&) = delete;
-	Stream& operator=(Stream const&) = delete;
-	
-	h128 m_cSecret;
-	bytes m_text;
-
-	Aes128Ctr* cryptor;
-};
-	
-
-/**
- * @brief Encrypted stream with inband SHA3 mac at specific interval.
- */
-class AuthenticatedStream: public Stream
-{
-public:
-	AuthenticatedStream(StreamType _t, h128 _ckey, h128 _mackey, unsigned _interval): Stream(_t, _ckey), m_macSecret(_mackey) { m_macInterval = _interval; }
-	
-	AuthenticatedStream(StreamType _t, Secret const& _s, unsigned _interval): Stream(_t, h128(_s)), m_macSecret(FixedHash<16>((byte const*)_s.data()+16,h128::ConstructFromPointer)) { m_macInterval = _interval; }
-	
-	/// Adjust mac interval. Next mac will be xored with value.
-	void adjustInterval(unsigned _interval) { m_macInterval = _interval; }
-
-	unsigned getMacInterval() { return m_macInterval;}
-	
-private:
-	AuthenticatedStream(AuthenticatedStream const&) = delete;
-	AuthenticatedStream& operator=(AuthenticatedStream const&) = delete;
-	
-	std::atomic<unsigned> m_macInterval;
-	h128 m_macSecret;
-};
-
-}
-}
 
 bytes aesDecrypt(bytesConstRef _cipher, std::string const& _password, unsigned _rounds = 2000, bytesConstRef _salt = bytesConstRef());
 
-}
+}

libdevcrypto/ECDHE.cpp

@@ -44,62 +44,3 @@ void ECDHE::agree(Public const& _remote, Secret& o_sharedSecret) const
 	s_secp256k1.agree(m_ephemeral.sec(), m_remoteEphemeral, o_sharedSecret);
 }
 
-void ECDHEKeyExchange::agree(Public const& _remoteEphemeral)
-{
-	s_secp256k1.agree(m_ephemeral.sec(), _remoteEphemeral, m_ephemeralSecret);
-}
-
-void ECDHEKeyExchange::exchange(bytes& o_exchange)
-{
-	if (!m_ephemeralSecret)
-		// didn't agree on public remote
-		BOOST_THROW_EXCEPTION(InvalidState());
-
-	// The key exchange payload is in two parts and is encrypted
-	// using ephemeral keypair.
-	//
-	// The first part is the 'prefix' which is a zero-knowledge proof
-	// allowing the remote to resume or emplace a previous session.
-	// If a session previously exists:
-	//	prefix is sha3(token) // todo: ephemeral entropy from both sides
-	// If a session doesn't exist:
-	//	prefix is sha3(m_ephemeralSecret)
-	//
-	// The second part is encrypted using the public key which relates to the prefix.
-	
-	Public encpk = m_known.first ? m_known.first : m_remoteEphemeral;
-	bytes exchange(encpk.asBytes());
-	
-	// This is the public key which we would like the remote to use,
-	// which maybe different than the previously-known public key.
-	//
-	// Here we should pick an appropriate alias or generate a new one,
-	// but for now, we use static alias passed to constructor.
-	//
-	Public p = toPublic(m_alias.m_secret);
-	exchange.resize(exchange.size() + sizeof(p));
-	memcpy(&exchange[exchange.size() - sizeof(p)], p.data(), sizeof(p));
-	
-	// protocol parameters; should be fixed size
-	bytes v(1, 0x80);
-	exchange.resize(exchange.size() + v.size());
-	memcpy(&exchange[exchange.size() - v.size()], v.data(), v.size());
-	
-	h256 auth;
-	sha3mac(m_alias.m_secret.ref(), m_ephemeralSecret.ref(), auth.ref());
-	Signature sig = s_secp256k1.sign(m_alias.m_secret, auth);
-	exchange.resize(exchange.size() + sizeof(sig));
-	memcpy(&exchange[exchange.size() - sizeof(sig)], sig.data(), sizeof(sig));
-	
-	aes::AuthenticatedStream aes(aes::Encrypt, m_ephemeralSecret, 0);
-	h256 prefix(sha3(m_known.second ? m_known.second : (h256)m_remoteEphemeral));
-	aes.update(prefix.ref());
-	
-	s_secp256k1.encrypt(encpk, exchange);
-	aes.update(&exchange);
-
-	aes.streamOut(o_exchange);
-}
-
-
-

libdevcrypto/ECDHE.h

@@ -38,7 +38,6 @@ using AliasSession = std::pair<Public,h256>;
  */
 class Alias
 {
-	friend class ECDHEKeyExchange; // todo: remove
 public:
 	Alias(Secret _s): m_secret(_s) {};
 	
@@ -77,40 +76,6 @@ protected:
 	mutable Public m_remoteEphemeral;		///< Public key of remote; parameter. Set once when agree is called, otherwise immutable.
 };
 
-/**
- * @brief Secure exchange of static keys.
- * Key exchange is encrypted with public key of remote and then encrypted by block cipher. For a blind remote the ecdhe public key is used to encrypt exchange, and for a known remote the known public key is used. The block cipher key is derived from ecdhe shared secret.
- *
- * Usage: Agree -> Exchange -> Authenticate
- */
-class ECDHEKeyExchange: private ECDHE
-{
-public:
-	/// Exchange with unknown remote (pass public key for ingress exchange)
-	ECDHEKeyExchange(Alias& _k): m_alias(_k) {}
-
-	/// Exchange with known remote
-	ECDHEKeyExchange(Alias& _k, AliasSession _known): m_alias(_k), m_known(_known) {}
-
-	/// Provide public key for dh agreement to generate shared secret.
-	void agree(Public const& _remoteEphemeral);
-	
-	/// @returns encrypted payload of key exchange
-	void exchange(bytes& o_exchange);
-	
-	/// Decrypt payload, check mac, check trust, decrypt exchange, authenticate exchange, verify version, verify signature, and if no failure occurs, update or creats trust and derive session-shared-secret.
-	bool authenticate(bytes _exchangeIn);
-
-private:
-	Secret m_ephemeralSecret;
-	Alias m_alias;
-	AliasSession m_known;
-	Secret m_sharedAliasSecret;
-
-	FixedHash<16> m_sharedC;
-	FixedHash<16> m_sharedM;
-};
-
 }
 }
 

test/libdevcrypto/AES.cpp

@@ -75,18 +75,6 @@ BOOST_AUTO_TEST_CASE(AesDecryptFailInvalidSeed2)
 	bytes seed = fromHex("000102030405060708090a0b0c0d0e0f000102030405060708090a0b0c0d0e0f");
 	BOOST_CHECK(bytes() == aesDecrypt(&seed, "test"));
 }
-BOOST_AUTO_TEST_CASE(AuthenticatedStreamConstructor)
-{
-	cout << "AuthenticatedStreamConstructor" << endl;
-
-	Secret const sec(dev::sha3("test"));
-	crypto::aes::AuthenticatedStream as(crypto::aes::Encrypt, sec, 0);
-	BOOST_CHECK(as.getMacInterval() == 0);
-	as.adjustInterval(1);
-	BOOST_CHECK(as.getMacInterval() == 1);
-	crypto::aes::AuthenticatedStream as_mac(crypto::aes::Encrypt, h128(), h128(), 42);
-	BOOST_CHECK(as_mac.getMacInterval() == 42);
-}
 
 BOOST_AUTO_TEST_SUITE_END()