public async Task <bool> SelectFolder(string folder)
{
var result = await ExecuteCommand(ImapCommands.SelectFolder(folder));
//Double check, some servers sometimes include a last line with a & OK appending extra info when command fails
return(result.Contains(ImapResponse.OK) && !result.Contains(ImapResponse.ERROR));
}
public async Task <bool> AuthenticateAsync(string user, string password)
{
if (ConnectionType == ImapConnectionType.STARTTLS)
{
await UpgradeToSecureConnection();
}
var result = await ExecuteCommand(ImapCommands.Login(user, password));
IsAuthenticated = result.Contains(ImapResponse.OK);
return(IsAuthenticated);
}
private async Task <bool> UpgradeToSecureConnection()
{
var commandResult = await ExecuteCommand(ImapCommands.StartTLS());
var upgradeSuccess = commandResult.Contains(ImapResponse.OK_TLS_NEGOTIATION);
if (upgradeSuccess)
{
ConnectionType = ImapConnectionType.SSL_TLS;
_stream = GetStream();
return(true);
}
else
{
throw new Exception("Could not upgrade IMAP non SSL connection using STARTTLS handshake");
}
}
public async Task <string> GetFolders()
{
return(await ExecuteCommand(ImapCommands.ListFolders()));
}