////  SignedWalletTransaction.cpp//  interface/src////  Created by Stephen Birarda on 2014-07-11.//  Copyright 2014 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include <QtCore/QCryptographicHash>#include <QtCore/QDebug>#include <QtCore/QFile> #include <openssl/bio.h>#include <openssl/rsa.h>#include <openssl/pem.h> #include <AccountManager.h> #include "Menu.h" #include "SignedWalletTransaction.h" SignedWalletTransaction::SignedWalletTransaction(const QUuid& destinationUUID, qint64 amount,                                                 qint64 messageTimestamp, qint64 expiryDelta) :    WalletTransaction(destinationUUID, amount),    _messageTimestamp(messageTimestamp),    _expiryDelta(expiryDelta){    } QByteArray SignedWalletTransaction::hexMessage() {    // build the message using the components of this transaction        // UUID, source UUID, destination UUID, message timestamp, expiry delta, amount    QByteArray messageBinary;        messageBinary.append(_uuid.toRfc4122());        messageBinary.append(reinterpret_cast<const char*>(&_messageTimestamp), sizeof(_messageTimestamp));    messageBinary.append(reinterpret_cast<const char*>(&_expiryDelta), sizeof(_expiryDelta));        messageBinary.append(AccountManager::getInstance().getAccountInfo().getWalletID().toRfc4122());        messageBinary.append(_destinationUUID.toRfc4122());        messageBinary.append(reinterpret_cast<const char*>(&_amount), sizeof(_amount));        return messageBinary.toHex();} QByteArray SignedWalletTransaction::messageDigest() {    return QCryptographicHash::hash(hexMessage(), QCryptographicHash::Sha256).toHex();} QByteArray SignedWalletTransaction::signedMessageDigest() {    // pull the current private key from menu into RSA structure in memory    QByteArray privateKeyByteArray = Menu::getInstance()->getWalletPrivateKey();        BIO* privateKeyBIO = NULL;    RSA* rsaPrivateKey = NULL;        privateKeyBIO = BIO_new_mem_buf(privateKeyByteArray.data(), privateKeyByteArray.size());    PEM_read_bio_RSAPrivateKey(privateKeyBIO, &rsaPrivateKey, NULL, NULL);        QByteArray digestToEncrypt = messageDigest();    QByteArray encryptedDigest(RSA_size(rsaPrivateKey), 0);        int encryptReturn = RSA_private_encrypt(digestToEncrypt.size(),                                            reinterpret_cast<const unsigned char*>(digestToEncrypt.constData()),                                            reinterpret_cast<unsigned char*>(encryptedDigest.data()),                                            rsaPrivateKey, RSA_PKCS1_PADDING);        // free the two structures used    BIO_free(privateKeyBIO);    RSA_free(rsaPrivateKey);        return (encryptReturn != -1) ? encryptedDigest : QByteArray();}