Upon checking this further I realized that I was doing the TLS1.2 thingy of extracting the (SSL_get1_session) existing session off the first successful full handshake and then setting it (SSL_set_session) as the session for the subsequent dc channel handshake. At this point fz server closed the connection with "425 TLS session of data connection not resumed." -ve response. The first cc handshake worked as expected but dc handshake for the subsequent list operation reported that (SSL_session_reused->false) it was actually a new TLS connection.
#CONFIGURE FILEZILLA SERVER 1.3.0 CODE#
It all worked fine till I tried the code again after 2 years (yesterday) on the latest gnutls based FZ and got this issue. I had a stable working openssl based FTPS code which I had tested for session resumption against the older filezilla servers (presumably openssl based as well). In my case it failed under slightly different circumstances which I believe is worth highlighting. The exception message could be translated as "Unhandled Exception: 32Exception: The client and server cannot communicate, because they do not possess a common algorithm"". À () dans C:\code\github\FluentFTP\FluentFTP\Client\FtpClient_Connection.cs:ligne 978 À (String command) dans C:\code\github\FluentFTP\FluentFTP\Client\FtpClient_Stream.cs:ligne 83 À (Encoding encoding, String buf) dans C:\code\github\FluentFTP\FluentFTP\Streams\FtpSocketStream.cs:ligne 694 À (Byte buffer, Int32 offset, Int32 count) dans C:\code\github\FluentFTP\FluentFTP\Streams\FtpSocketStream.cs:ligne 664 À .Write(Byte buffer, Int32 offset, Int32 count) À .CheckThrow(Boolean authSuccessCheck, Boolean shutdownCheck) Warning: FtpClient.Disconnect(): Exception caught and discarded while closing control connection: 32Exception (0x80004005): Le client et le serveur ne peuvent pas communiquer car ils ne possèdent aucun algorithme commun Status: Testing connectivity using Socket.Poll().
À (String args) dans C:\code\github\FluentFTP\FluentFTP.ConsoleApp\Program.cs:ligne 38 À () dans C:\code\github\FluentFTP\FluentFTP\Client\FtpClient_Connection.cs:ligne 418 À (String targethost, X509CertificateCollection clientCerts, SslProtocols sslProtocols) dans C:\code\github\FluentFTP\FluentFTP\Streams\FtpSocketStream.cs:ligne 1120 À .ProcessAuthentication(LazyAsyncResult lazyResult) À .ForceAuthentication(Boolean receiveFirst, Byte buffer, AsyncProtocolRequest asyncRequest) À .StartSendBlob(Byte incoming, Int32 count, AsyncProtocolRequest asyncRequest) À .NextMessage(Byte incoming, Int32 offset, Int32 count) À .GenerateToken(Byte input, Int32 offset, Int32 count, Byte& output) À .AcquireClientCredentials(Byte& thumbPrint) À .AcquireCredentialsHandle(CredentialUse credUsage, X509Certificate2 selectedCert, Flags flags) À .AcquireCredentialsHandle(CredentialUse credUsage, SecureCredential2& secureCredential) À (SSPIInterface SecModule, String package, CredentialUse intent, SecureCredential2 scc) Response: 234 Using authentication type TLS.Įxception non gérée : 32Exception: Le client et le serveur ne peuvent pas communiquer car ils ne possèdent aucun algorithme commun
Response: 425 Unable to build data connection: TLS session of data connection not resumed.įailed: Unable to build data connection: TLS session of data connection not resumed.
Status: Time to activate encryption: 0h 0m 0s. Response: 229 Entering Extended Passive Mode (|||53757|) > OpenPassiveDataStream(AutoPassive, "STOR /test/Program.cs", 0) > UploadFile("C:\code\tests\FtpTestConsole\Program.cs", "/test/Program.cs", NoCheck, False, None) Response: 215 UNIX emulated by FileZilla. Response: 202 UTF8 mode is always enabled. Response: MLST type* size* modify* perm* Response: 331 Please, specify the password. Response: 234 Using authentication type TLS. I also plan to submit this problem to filezilla server repo, with a simple exe to reproduce the problem on their side. I also have a wireshark dump available, with the certificate and the private key, but it seems to be a complex case to analyse. Of course, it works using the official FileZilla client. Since then, we have been unable to transfer files to FileZilla Server (only tested on windows). Please note that FileZilla has received a major overhaul in version 1.0, switching engine to gnuTLS. Run the test: the file won't be uploaded.LogFunctions = true using ( var client = new FtpClient ( "127.0.0.1 ", "hello ", "world " ) )
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