/// <summary>
/// Ipersonating active user by login.
/// </summary>
/// <param name="login">Login of logoned user.</param>
/// <param name="instruction">Routing instruction to target server.</param>
/// <returns></returns>
protected async Task ImpersonateUserAsync(string login, PartialAuthorizedInstruction instruction)
{
#region Define token
string token = null;
// If instruction is full authorized.
if (instruction is AuthorizedInstruction authorizedInstruction &&
authorizedInstruction.IsFullAuthorized)
{
// Apply full authorized token.
token = authorizedInstruction.AuthorizedToken;
}
/// <summary>
/// Requsting a public encryption key from a server definded into the instruction.
/// </summary>
/// <param name="pai">An instruction that would be used for routing to target server.</param>
/// <returns>A started async task that returns result of keys exchanging process.</returns>
private static async Task <bool> RequestPublicEncryptionKeyAsync(PartialAuthorizedInstruction pai)
{
// TODO not work.
// Create base part of query for reciving of public RSA key.
UniformQueries.Query query = null;
try
{
query = new UniformQueries.Query(
null,
new UniformQueries.QueryPart("token", pai.GuestToken),
new UniformQueries.QueryPart("get"),
new UniformQueries.QueryPart("publickey"),
new UniformQueries.QueryPart("guid", pai.GetHashCode().ToString()))
{
WaitForAnswer = true // Request waiting for answer before computing of the next query in queue.
};
}
catch (Exception ex)
{
Console.WriteLine("Encryption failed (rpeka10): " + ex.Message);
return(false);
}
// Getting line to prevent conflict.
TransmissionLine line = OpenOutTransmissionLineViaPP(pai.routingIP, pai.pipeName);
// Insert query to processing with termination of current query.
line.InsertQuery(query, true);
bool result = false;
bool completed = false;
// Open backward chanel to recive answer from server.
ReceiveDelayedAnswerViaPP(line, query,
// Create callback delegate that will set recived value to routing table.
delegate(TransmissionLine answerLine, UniformQueries.Query answer)
{
// Try to apply recived answer.
result = pai.AsymmetricEncryptionOperator.UpdateWithQuery(answer);
// Log about update
Console.WriteLine("{0}/{1}: \"{2}\" public key updating status {3}",
pai.routingIP, pai.pipeName,
PipesProvider.Security.Encryption.EnctyptionOperatorsHandler
.GetOperatorCode(pai.AsymmetricEncryptionOperator),
result);
// Finalize operation.
completed = true;
});
// Wait for result.
while (!completed)
{
await Task.Delay(20, ClientAppConfigurator.TerminationTokenSource.Token);
}
return(result);
}
