public StlsTransaction(PopConnection connection, UpgradeConnectionStreamCallback createAuthenticatedStreamCallback)
: base(connection)
{
if (createAuthenticatedStreamCallback == null)
throw new ArgumentNullException("createAuthenticatedStreamCallback");
this.createAuthenticatedStreamCallback = createAuthenticatedStreamCallback;
}
protected override void Connect(string host, int port, UpgradeConnectionStreamCallback createAuthenticatedStreamCallback)
{
try {
base.Connect(host, port, createAuthenticatedStreamCallback);
}
catch (ConnectionException ex) {
throw new PopConnectionException(ex.Message, ex.InnerException);
}
}
public override void UpgradeStream(UpgradeConnectionStreamCallback upgradeStreamCallback)
{
try {
base.UpgradeStream(upgradeStreamCallback);
}
catch (ConnectionException ex) {
throw new ImapUpgradeConnectionException(ex.Message, ex.InnerException);
}
}
public PopConnection(string host, int port, UpgradeConnectionStreamCallback createAuthenticatedStreamCallback)
: base(popConnectionTraceSource)
{
if (port == -1) {
if (createAuthenticatedStreamCallback == null)
port = PopDefaultPorts.Pop;
else
port = PopDefaultPorts.Pops;
}
Connect(host, port, createAuthenticatedStreamCallback);
}
public static PopSession CreateSession(IPopSessionProfile profile,
SaslClientMechanism authMechanismSpecified,
UpgradeConnectionStreamCallback createSslStreamCallback)
{
PopSession session;
var result = CreateSession(profile, authMechanismSpecified, createSslStreamCallback, out session);
if (result.Succeeded)
return session;
else
throw new PopAuthenticationException(result);
}
public void Connect(string password, UpgradeConnectionStreamCallback createSslStreamCallback)
{
ThrowIfAlreadyConnectedOrAsyncConnectRunning();
SetSession(ConnectCore(new ConnectParams(profile,
new NetworkCredential(profile.UserName, password),
createSslStreamCallback)));
}
public void Connect(ICredentialsByHost credentials, UpgradeConnectionStreamCallback createSslStreamCallback)
{
ThrowIfAlreadyConnectedOrAsyncConnectRunning();
SetSession(ConnectCore(new ConnectParams(profile,
credentials,
createSslStreamCallback)));
}
public ImapSession(string host, int port, int transactionTimeout, UpgradeConnectionStreamCallback createAuthenticatedStreamCallback)
: this(host, port, false, transactionTimeout, createAuthenticatedStreamCallback)
{
}
public IAsyncResult BeginConnect(SaslClientMechanism authMechanism,
UpgradeConnectionStreamCallback createSslStreamCallback,
AsyncCallback asyncCallback,
object asyncState)
{
return BeginConnect(new ConnectParams(profile,
authMechanism,
createSslStreamCallback),
asyncCallback,
asyncState);
}
/*
* transaction methods : connect/disconnect
*/
private void Connect(string host, int port, UpgradeConnectionStreamCallback createAuthenticatedStreamCallback)
{
TraceInfo("connecting");
this.connection = new PopConnection(host, port, createAuthenticatedStreamCallback);
TraceInfo("connected");
using (var t = new GreetingTransaction(connection)) {
try {
if (ProcessTransaction(t).Failed)
throw new PopConnectionException(string.Concat("connection refused or establishment failed: ", t.Result.ResultText));
}
catch (TimeoutException ex) {
throw new PopConnectionException("connection timed out", ex);
}
timestamp = t.Result.Value;
TransitStateTo(PopSessionState.Authorization);
}
if (ApopAvailable)
TraceInfo("APOP is available, timestamp is {0}", timestamp);
}
public PopSession(string host, int port, int transactionTimeout, UpgradeConnectionStreamCallback createAuthenticatedStreamCallback)
{
if (transactionTimeout < -1)
throw new ArgumentOutOfRangeException("transactionTimeout", transactionTimeout, "must be greater than or equals to -1");
this.transactionTimeout = transactionTimeout;
Connect(host, port, createAuthenticatedStreamCallback);
}
public IAsyncResult BeginConnect(string password,
UpgradeConnectionStreamCallback createSslStreamCallback)
{
return BeginConnect(password, createSslStreamCallback, null, null);
}
public ConnectParams(ImapClientProfile profile,
SaslClientMechanism authMechanism,
UpgradeConnectionStreamCallback createSslStreamCallback)
{
Profile = profile.Clone();
AuthMechanism = authMechanism;
CreateSslStreamCallback = createSslStreamCallback;
}
public PopConnection(string host, UpgradeConnectionStreamCallback createAuthenticatedStreamCallback)
: this(host, -1, createAuthenticatedStreamCallback)
{
}
public ImapSession(string host, int port, bool handlesReferralAsException, int transactionTimeout, UpgradeConnectionStreamCallback createAuthenticatedStreamCallback)
{
if (transactionTimeout < -1)
throw new ArgumentOutOfRangeException("transactionTimeout", transactionTimeout, "must be greater than or equals to -1");
this.handlesReferralAsException = handlesReferralAsException;
this.transactionTimeout = transactionTimeout;
this.readonlyHierarchyDelimiters = hierarchyDelimiters.AsReadOnly();
Connect(host, port, createAuthenticatedStreamCallback);
}
protected virtual void Connect(string host, int port, UpgradeConnectionStreamCallback createAuthenticatedStreamCallback)
{
if (host == null)
throw new ArgumentNullException("host");
if (port < IPEndPoint.MinPort || IPEndPoint.MaxPort < port)
throw new ArgumentOutOfRangeException("port", port, "out of range");
if (client != null)
throw new InvalidOperationException("already connected");
TcpClient c = null;
try {
c = new TcpClient();
c.ReceiveTimeout = DefaultTimeoutMilliseconds;
c.SendTimeout = DefaultTimeoutMilliseconds;
ConnectionTrace.Log(this, "connecting to {0}:{1}", host, port);
c.Connect(host, port);
this.host = host;
this.client = c;
this.remoteEndPoint = c.Client.RemoteEndPoint as IPEndPoint;
this.localEndPoint = c.Client.LocalEndPoint as IPEndPoint;
this.stream = CreateBufferedStream(ConnectionTrace.CreateTracingStream(this, client.GetStream()));
ConnectionTrace.Log(this, "connected: {0} ({1})", remoteEndPoint, host);
}
catch (Exception ex) {
ConnectionTrace.Log(this, ex);
if (c != null)
c.Close();
this.client = null;
throw new ConnectionException("connect failed", ex);
}
try {
if (createAuthenticatedStreamCallback != null) {
UpgradeStream(createAuthenticatedStreamCallback);
isSecurePortConnection = true;
}
}
catch {
this.client.Close();
this.client = null;
throw;
}
}
public virtual void UpgradeStream(UpgradeConnectionStreamCallback upgradeStreamCallback)
{
if (upgradeStreamCallback == null)
throw new ArgumentNullException("upgradeStreamCallback");
try {
var upgradedStream = upgradeStreamCallback(this, RawStream);
var sslStream = upgradedStream as SslStream;
if (sslStream != null)
ConnectionTrace.Log(this, "TLS started: {0}, {1}, {2}, {3}{4}",
sslStream.SslProtocol,
sslStream.CipherAlgorithm,
sslStream.HashAlgorithm,
sslStream.KeyExchangeAlgorithm,
sslStream.IsMutuallyAuthenticated ? ", mutually authenticated" : string.Empty);
stream = CreateBufferedStream(ConnectionTrace.CreateTracingStream(this, upgradedStream));
}
catch (AuthenticationException ex) {
ConnectionTrace.Log(this, ex);
throw new ConnectionException(string.Format("upgrading stream failed (callback: {0})", upgradeStreamCallback.Method), ex);
}
catch (IOException ex) {
ConnectionTrace.Log(this, ex);
throw new ConnectionException(string.Format("upgrading stream failed (callback: {0})", upgradeStreamCallback.Method), ex);
}
}
protected override ProcessTransactionDelegate Reset()
{
#if DEBUG
if (!RequestArguments.ContainsKey("compression mechanism"))
return ProcessArgumentNotSetted;
#endif
var compressionMechanism = RequestArguments["compression mechanism"] as ImapCompressionMechanism;
foreach (var decompression in new[] {
new {Mechanism = ImapCompressionMechanism.Deflate, CreateStreamCallback = new UpgradeConnectionStreamCallback(CreateDeflateStream)},
}) {
if (decompression.Mechanism != compressionMechanism)
continue;
createDecompressingStreamCallback = decompression.CreateStreamCallback;
return ProcessCompress;
}
return ProcessUnsupported;
}
public void Connect(SaslClientMechanism authMechanism, UpgradeConnectionStreamCallback createSslStreamCallback)
{
if (authMechanism == null)
throw new ArgumentNullException("authMechanism");
ThrowIfAlreadyConnectedOrAsyncConnectRunning();
SetSession(ConnectCore(new ConnectParams(profile,
authMechanism,
createSslStreamCallback)));
}
public IAsyncResult BeginConnect(string password,
UpgradeConnectionStreamCallback createSslStreamCallback,
AsyncCallback asyncCallback,
object asyncState)
{
return BeginConnect(new ConnectParams(profile,
new NetworkCredential(profile.UserName, password),
createSslStreamCallback),
asyncCallback,
asyncState);
}
public ConnectParams(ImapClientProfile profile,
ICredentialsByHost credentials,
UpgradeConnectionStreamCallback createSslStreamCallback)
{
Profile = profile.Clone();
Profile.SetCredentials(credentials);
CreateSslStreamCallback = createSslStreamCallback;
}
/*
* transaction methods : non-authenticated state
*/
/// <summary>sends STARTTLS command</summary>
/// <remarks>valid in non-authenticated state</remarks>
public ImapCommandResult StartTls(UpgradeConnectionStreamCallback createAuthenticatedStreamCallback)
{
return StartTls(createAuthenticatedStreamCallback, false);
}
public ImapSession(string host, int port, bool handlesReferralAsException, UpgradeConnectionStreamCallback createAuthenticatedStreamCallback)
: this(host, port, handlesReferralAsException, DefaultTransactionTimeout, createAuthenticatedStreamCallback)
{
}
/// <summary>sends STLS command</summary>
/// <remarks>valid in authorization state</remarks>
public PopCommandResult Stls(UpgradeConnectionStreamCallback createAuthenticatedStreamCallback, bool reissueCapability)
{
RejectNonAuthorizationState();
if (createAuthenticatedStreamCallback == null)
throw new ArgumentNullException("createAuthenticatedStreamCallback");
PopCommandResult result;
using (var t = new StlsTransaction(connection, createAuthenticatedStreamCallback)) {
if ((result = ProcessTransaction(t)).Succeeded)
// RFC 2595 Using TLS with IMAP, POP3 and ACAP
// http://tools.ietf.org/html/rfc2595
// 4. POP3 STARTTLS extension
// Once TLS has been started, the client MUST discard cached
// information about server capabilities and SHOULD re-issue
// the CAPA command. This is necessary to protect against
// man-in-the-middle attacks which alter the capabilities list
// prior to STLS. The server MAY advertise different
// capabilities after STLS.
SetServerCapabilities(new PopCapabilityList());
else
return result;
}
if (reissueCapability)
Capa();
return result;
}
public PopSession(string host, int port, UpgradeConnectionStreamCallback createAuthenticatedStreamCallback)
: this(host, port, DefaultTransactionTimeout, createAuthenticatedStreamCallback)
{
}
public IAsyncResult BeginConnect(SaslClientMechanism authMechanism,
UpgradeConnectionStreamCallback createSslStreamCallback)
{
return BeginConnect(authMechanism, createSslStreamCallback, null, null);
}
public IAsyncResult BeginConnect(ICredentialsByHost credentials,
UpgradeConnectionStreamCallback createSslStreamCallback)
{
return BeginConnect(credentials, createSslStreamCallback, null, null);
}
/*
* transaction methods : connect/disconnect
*/
private void Connect(string host, int port, UpgradeConnectionStreamCallback createAuthenticatedStreamCallback)
{
TraceInfo("connecting");
this.connection = new ImapConnection(host, port, createAuthenticatedStreamCallback);
TraceInfo("connected");
SetServerCapabilities(new ImapCapabilityList(new[] {
ImapCapability.Imap4Rev1 /* required by GreetingTransaction */
}));
ImapCommandResult result;
using (var t = new GreetingTransaction(connection)) {
try {
result = ProcessTransaction(t);
if (result.Code == ImapCommandResultCode.Bye) {
var refferalResponseCode = result.GetResponseCode(ImapResponseCode.Referral);
if (refferalResponseCode != null) {
// RFC 2221 IMAP4 Login Referrals
// http://tools.ietf.org/html/rfc2221
// 4.2. BYE at connection startup referral
// An IMAP4 server MAY respond with an untagged BYE and a REFERRAL
// response code that contains an IMAP URL to a home server if it is not
// willing to accept connections and wishes to direct the client to
// another IMAP4 server.
var referToUri = ImapResponseTextConverter.FromReferral(refferalResponseCode.ResponseText)[0];
if (handlesReferralAsException) {
throw new ImapLoginReferralException(string.Format("try another server: '{0}'", refferalResponseCode.ResponseText.Text),
referToUri);
}
else {
Trace.Info("login referral: '{0}'", refferalResponseCode.ResponseText.Text);
Trace.Info(" try to connect to {0}", referToUri);
}
}
}
if (result.Failed)
throw new ImapConnectionException(string.Concat("connection refused or establishment failed: ", result.ResultText));
}
catch (TimeoutException ex) {
throw new ImapConnectionException("connection timed out", ex);
}
if (result.Code == ImapCommandResultCode.PreAuth) {
UpdateAuthority(null, null);
TransitStateTo(ImapSessionState.Authenticated);
}
else {
TransitStateTo(ImapSessionState.NotAuthenticated);
}
// 7.1. Server Responses - Status Responses
// CAPABILITY
// Followed by a list of capabilities. This can appear in the
// initial OK or PREAUTH response to transmit an initial
// capabilities list. This makes it unnecessary for a client to
// send a separate CAPABILITY command if it recognizes this
// response.
var capabilityResponseCode = result.GetResponseCode(ImapResponseCode.Capability);
if (capabilityResponseCode == null)
// clear server capabilities
SetServerCapabilities(new ImapCapabilityList());
else
SetServerCapabilities(ImapResponseTextConverter.FromCapability(capabilityResponseCode.ResponseText));
}
}
/// <summary>sends STARTTLS command</summary>
/// <remarks>valid in non-authenticated state</remarks>
public ImapCommandResult StartTls(UpgradeConnectionStreamCallback createAuthenticatedStreamCallback, bool reissueCapability)
{
RejectNonConnectedState();
if (state != ImapSessionState.NotAuthenticated)
throw new ImapProtocolViolationException("already authenticated");
if (createAuthenticatedStreamCallback == null)
throw new ArgumentNullException("createAuthenticatedStreamCallback");
ImapCommandResult result;
using (var t = new StartTlsTransaction(connection, createAuthenticatedStreamCallback)) {
if ((result = ProcessTransaction(t)).Succeeded)
// 6.2.1. STARTTLS Command
// Once [TLS] has been started, the client MUST discard cached
// information about server capabilities and SHOULD re-issue the
// CAPABILITY command.
SetServerCapabilities(new ImapCapabilityList());
else
return result;
}
if (reissueCapability)
Capability();
return result;
}
public IAsyncResult BeginConnect(ICredentialsByHost credentials,
UpgradeConnectionStreamCallback createSslStreamCallback,
AsyncCallback asyncCallback,
object asyncState)
{
return BeginConnect(new ConnectParams(profile,
credentials,
createSslStreamCallback),
asyncCallback,
asyncState);
}
