public static string Authorize(this BaseProtocolClient ingoingMailClient, MailServerSettings settings, int waitTimeout = 5000, ILogger log = null)
{
if (log == null)
log = new NullLogger();
string lastResponse;
switch (settings.EncryptionType)
{
case EncryptionType.SSL:
var timeout = TimeSpan.FromMinutes(3); // 3 minutes
log.Debug("SSL connecting to {0} (timeout = {1} minutes)", settings.Url, timeout.TotalMinutes);
lastResponse = ingoingMailClient.ConnectSsl(settings.Url, settings.Port, (int)timeout.TotalMilliseconds);
break;
default:
log.Debug("PLAIN connecting to {0}", settings.Url);
lastResponse = ingoingMailClient.ConnectPlain(settings.Url, settings.Port);
if (ingoingMailClient is SmtpClient &&
(settings.AuthenticationType != SaslMechanism.None ||
settings.EncryptionType == EncryptionType.StartTLS))
{
lastResponse = ingoingMailClient.SendEhloHelo();
}
if (settings.EncryptionType == EncryptionType.StartTLS)
{
log.Debug("StartTLS {0}", settings.Url);
lastResponse = ingoingMailClient.StartTLS(settings.Url);
}
break;
}
if (settings.AuthenticationType == SaslMechanism.Login)
{
log.Debug("Login as {0} with secret password", settings.AccountName);
lastResponse = ingoingMailClient.Login(settings.AccountName, settings.AccountPass);
}
else
{
if (ingoingMailClient is SmtpClient && settings.AuthenticationType == SaslMechanism.None)
{
log.Debug("Authentication not required");
return lastResponse;
}
log.Debug("Authenticate as {0} with secret password", settings.AccountName);
lastResponse = ingoingMailClient.Authenticate(settings.AccountName, settings.AccountPass, settings.AuthenticationType);
}
return lastResponse;
}
public static void AuthenticateImap(this Imap4Client imap, MailBox account, ILogger log = null)
{
if (log == null)
log = new NullLogger();
if (account.RefreshToken != null)
{
var serviceType = (AuthorizationServiceType)account.ServiceType;
switch (serviceType)
{
case AuthorizationServiceType.Google:
imap.AuthenticateImapGoogleOAuth2(account, log);
return;
}
}
imap.Authorize(new MailServerSettings
{
AccountName = account.Account,
AccountPass = account.Password,
AuthenticationType = account.AuthenticationTypeIn,
EncryptionType = account.IncomingEncryptionType,
Port = account.Port,
Url = account.Server
}, account.AuthorizeTimeoutInMilliseconds, log);
log.Info("IMAP logged in to {0}", account.EMail);
}
public static void AuthenticateImapGoogleOAuth2(this Imap4Client imap, MailBox account, ILogger log = null)
{
if (log == null)
log = new NullLogger();
var auth = new GoogleOAuth2Authorization(log);
var grantedAccess = auth.RequestAccessToken(account.RefreshToken);
if (grantedAccess == null)
throw new DotNetOpenAuth.Messaging.ProtocolException("Access denied");
log.Info("IMAP SSL connecting to {0}", account.EMail);
imap.ConnectSsl(account.Server, account.Port);
log.Info("IMAP connecting OK {0}", account.EMail);
log.Info("IMAP logging to {0} via OAuth 2.0", account.EMail);
imap.LoginOAuth2(account.Account, grantedAccess.AccessToken);
log.Info("IMAP logged to {0} via OAuth 2.0", account.EMail);
}
