void domain_transfer_operation::titan_transfer( const fc::ecc::private_key& one_time_private_key,
const fc::ecc::public_key& to_public_key,
const fc::ecc::private_key& from_private_key,
const std::string& memo_message,
const fc::ecc::public_key& memo_pub_key,
memo_flags_enum memo_type )
{
memo = titan_memo();
auto secret = one_time_private_key.get_shared_secret( to_public_key );
auto ext_to_public_key = extended_public_key(to_public_key);
auto secret_ext_public_key = ext_to_public_key.child( fc::sha256::hash(secret) );
auto secret_public_key = secret_ext_public_key.get_pub_key();
owner = address( secret_public_key );
auto check_secret = from_private_key.get_shared_secret( secret_public_key );
memo_data memo_content;
memo_content.set_message( memo_message );
memo_content.from = memo_pub_key;
memo_content.from_signature = check_secret._hash[0];
memo_content.memo_flags = memo_type;
memo->one_time_key = one_time_private_key.get_public_key();
FC_ASSERT( memo.valid() );
memo->encrypted_memo_data = fc::aes_encrypt( secret, fc::raw::pack( memo_content ) );
}
PublicKeyType withdraw_with_escrow::encrypt_memo_data(
const fc::ecc::private_key& one_time_private_key,
const fc::ecc::public_key& to_public_key,
const fc::ecc::private_key& from_private_key,
const std::string& memo_message,
const fc::ecc::public_key& memo_pub_key,
MemoFlagsEnum memo_type)
{
memo = TransferMemo();
const auto secret = one_time_private_key.get_shared_secret(to_public_key);
const auto ext_to_public_key = ExtendedPublicKey(to_public_key);
const auto secret_ext_public_key = ext_to_public_key.child(fc::sha256::hash(secret));
const auto secret_public_key = secret_ext_public_key.get_pub_key();
sender = Address(one_time_private_key.get_public_key());
receiver = Address(secret_public_key);
fc::sha512 check_secret;
if (from_private_key.get_secret() != fc::ecc::private_key().get_secret())
check_secret = from_private_key.get_shared_secret(secret_public_key);
MemoData memo_content;
memo_content.set_message(memo_message);
memo_content.from = memo_pub_key;
memo_content.from_signature = check_secret._hash[0];
memo_content.memo_flags = memo_type;
memo->one_time_key = one_time_private_key.get_public_key();
encrypt_memo_data(secret, memo_content);
return secret_public_key;
}
public_key_type withdraw_with_signature::encrypt_memo_data(
const fc::ecc::private_key& one_time_private_key,
const fc::ecc::public_key& to_public_key,
const fc::ecc::private_key& from_private_key,
const std::string& memo_message,
const fc::ecc::public_key& memo_pub_key,
memo_flags_enum memo_type )
{
memo = titan_memo();
const auto secret = one_time_private_key.get_shared_secret( to_public_key );
const auto ext_to_public_key = extended_public_key( to_public_key );
const auto secret_ext_public_key = ext_to_public_key.child( fc::sha256::hash( secret ) );
const auto secret_public_key = secret_ext_public_key.get_pub_key();
owner = address( secret_public_key );
fc::sha512 check_secret;
if( from_private_key.get_secret() != fc::ecc::private_key().get_secret() )
check_secret = from_private_key.get_shared_secret( secret_public_key );
memo_data memo_content;
memo_content.set_message( memo_message );
memo_content.from = memo_pub_key;
memo_content.from_signature = check_secret._hash[0];
memo_content.memo_flags = memo_type;
memo->one_time_key = one_time_private_key.get_public_key();
encrypt_memo_data( secret, memo_content );
return secret_public_key;
}
omemo_status domain_transfer_operation::decrypt_memo_data( const fc::ecc::private_key& receiver_key ) const
{ try {
FC_ASSERT( memo.valid() );
// ilog( "receiver_key: ${r}", ("r",receiver_key) );
auto secret = receiver_key.get_shared_secret( memo->one_time_key );
// ilog( "secret: ${secret}", ("secret",secret) );
extended_private_key ext_receiver_key(receiver_key);
// ilog( "ext_receiver_key: ${key}",("key",ext_receiver_key) );
fc::ecc::private_key secret_private_key = ext_receiver_key.child( fc::sha256::hash(secret),
extended_private_key::public_derivation );
// ilog( "secret_private_key: ${k}", ("k",secret_private_key) );
auto secret_public_key = secret_private_key.get_public_key();
// ilog( "secret_public_key: ${k}", ("k",secret_public_key) );
if( owner != address(secret_public_key) )
return omemo_status();
// ilog( "owner: ${o} == ${address}", ("o",owner)("address",address(secret_public_key)) );
auto memo = decrypt_memo_data( secret );
bool has_valid_signature = false;
if( memo.memo_flags == from_memo )
{
auto check_secret = secret_private_key.get_shared_secret( memo.from );
has_valid_signature = check_secret._hash[0] == memo.from_signature;
}
else
{
has_valid_signature = true;
}
return memo_status( memo, has_valid_signature, secret_private_key );
} FC_RETHROW_EXCEPTIONS( warn, "" ) }
omemo_status withdraw_with_signature::decrypt_memo_data( const fc::ecc::private_key& receiver_key, bool ignore_owner )const
{ try {
try {
FC_ASSERT( memo.valid() );
auto secret = receiver_key.get_shared_secret( memo->one_time_key );
extended_private_key ext_receiver_key(receiver_key);
fc::ecc::private_key secret_private_key = ext_receiver_key.child( fc::sha256::hash(secret),
extended_private_key::public_derivation );
auto secret_public_key = secret_private_key.get_public_key();
if( !ignore_owner && owner != address( secret_public_key ) )
return omemo_status();
auto memo = decrypt_memo_data( secret );
bool has_valid_signature = false;
if( memo.memo_flags == from_memo && !( memo.from == public_key_type() && memo.from_signature == 0 ) )
{
auto check_secret = secret_private_key.get_shared_secret( memo.from );
has_valid_signature = check_secret._hash[0] == memo.from_signature;
}
else
{
has_valid_signature = true;
}
return memo_status( memo, has_valid_signature, secret_private_key );
}
catch ( const fc::aes_exception& e )
{
return omemo_status();
}
} FC_CAPTURE_AND_RETHROW( (ignore_owner) ) }
encrypted_message message::encrypt( const fc::ecc::private_key& onetimekey,
const fc::ecc::public_key& receiver_public_key )const
{
auto shared_secret = onetimekey.get_shared_secret( receiver_public_key );
encrypted_message result;
result.onetimekey = onetimekey.get_public_key();
result.data = fc::aes_encrypt( shared_secret, fc::raw::pack( *this ) );
return result;
}
message encrypted_message::decrypt( const fc::ecc::private_key& e )const
{
auto shared_secret = e.get_shared_secret(onetimekey);
return decrypt(shared_secret);
}