private void GetEnclaveSession(string enclaveType, string serverName, string enclaveAttestationUrl, out SqlEnclaveSession sqlEnclaveSession, out long counter, bool throwIfNull)
{
SqlColumnEncryptionEnclaveProvider sqlColumnEncryptionEnclaveProvider = GetEnclaveProvider(enclaveType);
sqlColumnEncryptionEnclaveProvider.GetEnclaveSession(serverName, enclaveAttestationUrl, out sqlEnclaveSession, out counter);
if (throwIfNull)
{
if (sqlEnclaveSession == null)
{
throw SQL.NullEnclaveSessionDuringQueryExecution(enclaveType, enclaveAttestationUrl);
}
}
}
/// <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);
}
}
}