/// <summary>
/// Create a new enclave session
/// </summary>
/// <param name="enclaveType">enclave type</param>
/// <param name="serverName">servername</param>
/// <param name="attestationUrl">attestation url for attestation service endpoint</param>
/// <param name="attestationInfo">attestation info from SQL Server</param>
/// <param name="attestationParameters">attestation parameters</param>
internal void CreateEnclaveSession(string enclaveType, string serverName, string attestationUrl,
byte[] attestationInfo, SqlEnclaveAttestationParameters attestationParameters)
{
lock (_lock) {
SqlColumnEncryptionEnclaveProvider sqlColumnEncryptionEnclaveProvider = GetEnclaveProvider(enclaveType);
long counter;
SqlEnclaveSession sqlEnclaveSession = null;
sqlColumnEncryptionEnclaveProvider.GetEnclaveSession(serverName, attestationUrl, out sqlEnclaveSession, out counter);
if (sqlEnclaveSession != null)
{
return;
}
sqlColumnEncryptionEnclaveProvider.CreateEnclaveSession(attestationInfo, attestationParameters.ClientDiffieHellmanKey, attestationUrl, serverName, out sqlEnclaveSession, out counter);
if (sqlEnclaveSession == null)
{
throw SQL.NullEnclaveSessionReturnedFromProvider(enclaveType, attestationUrl);
}
}
}
internal byte[] GetSerializedAttestationParameters(SqlEnclaveAttestationParameters sqlEnclaveAttestationParameters, string enclaveType)
{
byte[] attestationProtocolBytes = null;
byte[] attestationProtocolInputLengthBytes = null;
byte[] clientDHPublicKeyLengthBytes = null;
int attestationProtocolInt = sqlEnclaveAttestationParameters.Protocol;
// attestation protocol
attestationProtocolBytes = GetUintBytes(enclaveType, attestationProtocolInt, "attestationProtocol");
if (attestationProtocolBytes == null)
{
throw SQL.NullArgumentInternal("attestationProtocolBytes", ClassName, GetSerializedAttestationParametersName);
}
// attestationProtocolInput
byte[] attestationProtocolInputBytes = sqlEnclaveAttestationParameters.GetInput();
// attestationProtocolInput length
attestationProtocolInputLengthBytes = GetUintBytes(enclaveType, attestationProtocolInputBytes.Length, "attestationProtocolInputLength");
if (attestationProtocolInputLengthBytes == null)
{
throw SQL.NullArgumentInternal("attestationProtocolInputLengthBytes", ClassName, GetSerializedAttestationParametersName);
}
// clientDHPublicKey
byte[] clientDHPublicKey = sqlEnclaveAttestationParameters.ClientDiffieHellmanKey.Key.Export(CngKeyBlobFormat.EccPublicBlob);
// clientDHPublicKey length
clientDHPublicKeyLengthBytes = GetUintBytes(enclaveType, clientDHPublicKey.Length, "clientDHPublicKeyLength");
if (clientDHPublicKeyLengthBytes == null)
{
throw SQL.NullArgumentInternal("clientDHPublicKeyLengthBytes", ClassName, GetSerializedAttestationParametersName);
}
return(CombineByteArrays(new[] { attestationProtocolBytes, attestationProtocolInputLengthBytes, attestationProtocolInputBytes, clientDHPublicKeyLengthBytes, clientDHPublicKey }));
}