void encryptionOracle(std::ostream & outputStream, std::istream & inputStream)
{
std::uniform_int_distribution<unsigned short> prefixAndSuffixLength(5, 10);
std::istringstream prefix(
generateRandomBytes(prefixAndSuffixLength(getRandomNumbers())));
cat_streambuf prefixThenInput(prefix, inputStream);
std::istream prefixAndInput(&prefixThenInput);
std::istringstream suffix(
generateRandomBytes(prefixAndSuffixLength(getRandomNumbers())));
cat_streambuf prefixThenInputThenSuffix(prefixAndInput, suffix);
std::istream prefixAndInputAndSuffix(&prefixThenInputThenSuffix);
std::uniform_int_distribution<unsigned short> decideEncryptionMethod(0, 1);
if (decideEncryptionMethod(getRandomNumbers())) {
lastEncryptionMode = EncryptionMode::ECB;
aes_ecb_encrypt(outputStream,
prefixAndInputAndSuffix,
generateRandomBytes(CryptoPP::AES::BLOCKSIZE));
} else {
lastEncryptionMode = EncryptionMode::CBC;
aes_cbc_encrypt(outputStream,
prefixAndInputAndSuffix,
generateRandomBytes(CryptoPP::AES::BLOCKSIZE),
generateRandomBytes(CryptoPP::AES::BLOCKSIZE).c_str());
}
}
typename SecureUniformRandomNumberGenerator<quality>::result_type
SecureUniformRandomNumberGenerator<quality>::operator()()
{
std::vector<uint8_t> bytes =
generateRandomBytes(sizeof(uint64_t), quality);
return *reinterpret_cast<uint64_t const *>(bytes.data());
}
QByteArray QXmppSaslDigestMd5::generateNonce()
{
QByteArray nonce = generateRandomBytes(32);
// The random data can the '=' char is not valid as it is a delimiter,
// so to be safe, base64 the nonce
return nonce.toBase64();
}
NvPairingManager::PairState
NvPairingManager::pair(QString appVersion, QString pin)
{
int serverMajorVersion = NvHTTP::parseQuad(appVersion).at(0);
qInfo() << "Pairing with server generation:" << serverMajorVersion;
QCryptographicHash::Algorithm hashAlgo;
int hashLength;
if (serverMajorVersion >= 7)
{
// Gen 7+ uses SHA-256 hashing
hashAlgo = QCryptographicHash::Sha256;
hashLength = 32;
}
else
{
// Prior to Gen 7 uses SHA-1 hashing
hashAlgo = QCryptographicHash::Sha1;
hashLength = 20;
}
QByteArray salt = generateRandomBytes(16);
QByteArray saltedPin = saltPin(salt, pin);
AES_KEY encKey, decKey;
AES_set_decrypt_key(reinterpret_cast<const unsigned char*>(QCryptographicHash::hash(saltedPin, hashAlgo).data()), 128, &decKey);
AES_set_encrypt_key(reinterpret_cast<const unsigned char*>(QCryptographicHash::hash(saltedPin, hashAlgo).data()), 128, &encKey);
QString getCert = m_Http.openConnectionToString(m_Http.m_BaseUrlHttp,
"pair",
"devicename=roth&updateState=1&phrase=getservercert&salt=" +
salt.toHex() + "&clientcert=" + IdentityManager::get()->getCertificate().toHex(),
false);
NvHTTP::verifyResponseStatus(getCert);
if (NvHTTP::getXmlString(getCert, "paired") != "1")
{
qCritical() << "Failed pairing at stage #1";
return PairState::FAILED;
}
QByteArray serverCert = NvHTTP::getXmlStringFromHex(getCert, "plaincert");
if (serverCert == nullptr)
{
qCritical() << "Server likely already pairing";
m_Http.openConnectionToString(m_Http.m_BaseUrlHttp, "unpair", nullptr, true);
return PairState::ALREADY_IN_PROGRESS;
}
QByteArray randomChallenge = generateRandomBytes(16);
QByteArray encryptedChallenge = encrypt(randomChallenge, &encKey);
QString challengeXml = m_Http.openConnectionToString(m_Http.m_BaseUrlHttp,
"pair",
"devicename=roth&updateState=1&clientchallenge=" +
encryptedChallenge.toHex(),
true);
NvHTTP::verifyResponseStatus(challengeXml);
if (NvHTTP::getXmlString(challengeXml, "paired") != "1")
{
qCritical() << "Failed pairing at stage #2";
m_Http.openConnectionToString(m_Http.m_BaseUrlHttp, "unpair", nullptr, true);
return PairState::FAILED;
}
QByteArray challengeResponseData = decrypt(m_Http.getXmlStringFromHex(challengeXml, "challengeresponse"), &decKey);
QByteArray clientSecretData = generateRandomBytes(16);
QByteArray challengeResponse;
QByteArray serverResponse(challengeResponseData.data(), hashLength);
#if (OPENSSL_VERSION_NUMBER < 0x10002000L)
ASN1_BIT_STRING *asnSignature = m_Cert->signature;
#elif (OPENSSL_VERSION_NUMBER < 0x10100000L)
ASN1_BIT_STRING *asnSignature;
X509_get0_signature(&asnSignature, NULL, m_Cert);
#else
const ASN1_BIT_STRING *asnSignature;
X509_get0_signature(&asnSignature, NULL, m_Cert);
#endif
challengeResponse.append(challengeResponseData.data() + hashLength, 16);
challengeResponse.append(reinterpret_cast<char*>(asnSignature->data), asnSignature->length);
challengeResponse.append(clientSecretData);
QByteArray encryptedChallengeResponseHash = encrypt(QCryptographicHash::hash(challengeResponse, hashAlgo), &encKey);
QString respXml = m_Http.openConnectionToString(m_Http.m_BaseUrlHttp,
"pair",
"devicename=roth&updateState=1&serverchallengeresp=" +
encryptedChallengeResponseHash.toHex(),
true);
NvHTTP::verifyResponseStatus(respXml);
if (NvHTTP::getXmlString(respXml, "paired") != "1")
{
qCritical() << "Failed pairing at stage #3";
m_Http.openConnectionToString(m_Http.m_BaseUrlHttp, "unpair", nullptr, true);
return PairState::FAILED;
}
QByteArray pairingSecret = NvHTTP::getXmlStringFromHex(respXml, "pairingsecret");
QByteArray serverSecret = QByteArray(pairingSecret.data(), 16);
QByteArray serverSignature = QByteArray(&pairingSecret.data()[16], 256);
if (!verifySignature(serverSecret,
serverSignature,
serverCert))
{
qCritical() << "MITM detected";
m_Http.openConnectionToString(m_Http.m_BaseUrlHttp, "unpair", nullptr, true);
return PairState::FAILED;
}
QByteArray expectedResponseData;
expectedResponseData.append(randomChallenge);
expectedResponseData.append(getSignatureFromPemCert(serverCert));
expectedResponseData.append(serverSecret);
if (QCryptographicHash::hash(expectedResponseData, hashAlgo) != serverResponse)
{
qCritical() << "Incorrect PIN";
m_Http.openConnectionToString(m_Http.m_BaseUrlHttp, "unpair", nullptr, true);
return PairState::PIN_WRONG;
}
QByteArray clientPairingSecret;
clientPairingSecret.append(clientSecretData);
clientPairingSecret.append(signMessage(clientSecretData));
QString secretRespXml = m_Http.openConnectionToString(m_Http.m_BaseUrlHttp,
"pair",
"devicename=roth&updateState=1&clientpairingsecret=" +
clientPairingSecret.toHex(),
true);
NvHTTP::verifyResponseStatus(secretRespXml);
if (NvHTTP::getXmlString(secretRespXml, "paired") != "1")
{
qCritical() << "Failed pairing at stage #4";
m_Http.openConnectionToString(m_Http.m_BaseUrlHttp, "unpair", nullptr, true);
return PairState::FAILED;
}
QString pairChallengeXml = m_Http.openConnectionToString(m_Http.m_BaseUrlHttps,
"pair",
"devicename=roth&updateState=1&phrase=pairchallenge",
true);
NvHTTP::verifyResponseStatus(pairChallengeXml);
if (NvHTTP::getXmlString(pairChallengeXml, "paired") != "1")
{
qCritical() << "Failed pairing at stage #5";
m_Http.openConnectionToString(m_Http.m_BaseUrlHttp, "unpair", nullptr, true);
return PairState::FAILED;
}
return PairState::PAIRED;
}
