Topic "Download fails using .NET Assembly"

Author Message
tkargel
[View user's profile]

Joined: 2012-10-01
Posts: 2
Software: WinSCP 5.1.0
Transfer Protocol: SFTP-3
GUI Style: Explorer
FTP Server Software: freeSSHd 1.2.4
OS: Windows 7

Subject: Download fails using .NET Assembly

For testing, I'm running freeSSHd and WinSCP on my machine with FULL admin permissions.

I can successfully download files from freeSSHd using the WinSCP GUI.

But when I try the same using automation in my C# program, I get the error:
"Can't get attributes of file 'C:\SFTPHome\hostedfiles'."
with inner exception: "Permission denied. Error code: 3 Error message from server: Permission denied Request code: 7".

My Code:

private void DownloadFiles()
{
try
{
// Setup session options...
SessionOptions sessionOptions = new SessionOptions
{
SshPrivateKeyPath = @"C:\Users\tkargel\Documents\Visual Studio 2010\Projects\Resolute\ResoportDownload\sftpkey.ppk",
PortNumber = 22,
Protocol = Protocol.Sftp,
HostName = "LT-CND0411CDW",
UserName = "sftpuser2",
SshHostKeyFingerprint = "ssh-rsa 1024 65:2b:97:1d:2c:24:30:5a:ec:b2:33:85:4d:df:17:74"
};

using (Session session = new Session())
{
// Connect
session.SessionLogPath = ("C:\\SFTPHome\\freesshd.log");
session.Open(sessionOptions);

// Download files
TransferOptions transferOptions = new TransferOptions();
transferOptions.TransferMode = TransferMode.Binary;
TransferOperationResult transferResult;
transferResult = session.GetFiles(GlobalVar.PathFilesHosted, GlobalVar.PathFilesDownloaded, false, transferOptions);

// Throw on any error
transferResult.Check();

// Print results
foreach (TransferEventArgs transfer in transferResult.Transfers)
{
Console.WriteLine("Upload of {0} succeeded", transfer.FileName);
}
}

}
catch (Exception ex)
{
Console.WriteLine("Error: {0}", ex);
throw;
}
}

Comparative logs:

// Download file using WinSCP GUI ///////////////////////////////////////////////////
09-28-2012 16:27:22 HOST LT-CND0411CDW.ResoluteEnergy.com SSH connection attempt.
09-28-2012 16:27:23 HOST LT-CND0411CDW.ResoluteEnergy.com SSH sftpuser2 successfully logged on using public key.
09-28-2012 16:27:23 SFTP service granted to user sftpuser2.
09-28-2012 16:27:23 HOST LT-CND0411CDW.ResoluteEnergy.com sftpuser2 is listing /hostedfiles (C:\SFTPHome\hostedfiles)
09-28-2012 16:28:31 HOST LT-CND0411CDW.ResoluteEnergy.com sftpuser2 is downloading /hostedfiles/FTP1.txt (C:\SFTPHome\hostedfiles\FTP1.txt)

// Download file using .NET Assembly in C# program //////////////////////////////////
. 2012-09-28 16:36:04.993 --------------------------------------------------------------------------
. 2012-09-28 16:36:04.993 WinSCP Version 5.1.0 (Build 2625) (OS 6.1.7601 Service Pack 1)
. 2012-09-28 16:36:04.993 Configuration: nul
. 2012-09-28 16:36:04.993 Local account: RESOLUTEENERGY\tkargel
. 2012-09-28 16:36:04.994 Working directory: C:\Users\tkargel\Documents\Visual Studio 2010\Projects\Resolute\ResoportDownload\ResoportConsole\ResoportConsole\bin

\Debug
. 2012-09-28 16:36:04.994 Command-line: "C:\Program Files (x86)\WinSCP\winscp.exe" /xmllog="C:\Users\tkargel\AppData\Local\Temp\tmp9351.tmp" /xmlgroups

/nointeractiveinput /dotnet=510 /ini=nul /log="C:\SFTPHome\freesshd.log" /console /consoleinstance=_4736_113
. 2012-09-28 16:36:04.994 Login time: Friday, September 28, 2012 4:36:04 PM
. 2012-09-28 16:36:04.994 --------------------------------------------------------------------------
. 2012-09-28 16:36:04.994 Session name: sftpuser2@LT-CND0411CDW (Ad-Hoc session)
. 2012-09-28 16:36:04.994 Host name: LT-CND0411CDW (Port: 22)
. 2012-09-28 16:36:04.994 User name: sftpuser2 (Password: No, Key file: Yes)
. 2012-09-28 16:36:04.994 Tunnel: No
. 2012-09-28 16:36:04.994 Transfer Protocol: SFTP
. 2012-09-28 16:36:04.994 Ping type: -, Ping interval: 30 sec; Timeout: 15 sec
. 2012-09-28 16:36:04.994 Proxy: none
. 2012-09-28 16:36:04.994 SSH protocol version: 2; Compression: No
. 2012-09-28 16:36:04.994 Bypass authentication: No
. 2012-09-28 16:36:04.994 Try agent: Yes; Agent forwarding: No; TIS/CryptoCard: No; KI: Yes; GSSAPI: No
. 2012-09-28 16:36:04.994 Ciphers: aes,blowfish,3des,WARN,arcfour,des; Ssh2DES: No
. 2012-09-28 16:36:04.994 SSH Bugs: A,A,A,A,A,A,A,A,A,A
. 2012-09-28 16:36:04.994 SFTP Bugs: A,A
. 2012-09-28 16:36:04.994 Return code variable: Autodetect; Lookup user groups: A
. 2012-09-28 16:36:04.994 Shell: default
. 2012-09-28 16:36:04.994 EOL: 0, UTF: 2
. 2012-09-28 16:36:04.994 Clear aliases: Yes, Unset nat.vars: Yes, Resolve symlinks: Yes
. 2012-09-28 16:36:04.994 LS: ls -la, Ign LS warn: Yes, Scp1 Comp: No
. 2012-09-28 16:36:04.994 Local directory: default, Remote directory: home, Update: Yes, Cache: Yes
. 2012-09-28 16:36:04.994 Cache directory changes: Yes, Permanent: Yes
. 2012-09-28 16:36:04.994 DST mode: 1
. 2012-09-28 16:36:04.994 --------------------------------------------------------------------------
. 2012-09-28 16:36:04.994 Looking up host "LT-CND0411CDW"
. 2012-09-28 16:36:04.998 Connecting to fe80::60fb:1baf:338f:5ae9%13 port 22
. 2012-09-28 16:36:06.182 Failed to connect to fe80::60fb:1baf:338f:5ae9%13: Network error: Connection refused
. 2012-09-28 16:36:06.182 Connecting to fe80::60fb:1baf:338f:5ae9%13 port 22
09-28-2012 16:36:06 HOST LT-CND0411CDW.ResoluteEnergy.com SSH connection attempt.
. 2012-09-28 16:36:06.182 Server version: SSH-2.0-WeOnlyDo 2.1.3
. 2012-09-28 16:36:06.182 Using SSH protocol version 2
. 2012-09-28 16:36:06.182 We claim version: SSH-2.0-WinSCP_release_5.1
. 2012-09-28 16:36:06.182 Using Diffie-Hellman with standard group "group14"
. 2012-09-28 16:36:06.182 Doing Diffie-Hellman key exchange with hash SHA-1
. 2012-09-28 16:36:06.385 Verifying host key rsa2 ...
. 2012-09-28 16:36:06.385 Host key matches configured key
. 2012-09-28 16:36:06.385 Host key fingerprint is:
. 2012-09-28 16:36:06.385 ssh-rsa 1024 65:2b:97:1d:2c:24:30:5a:ec:b2:33:85:4d:df:17:74
. 2012-09-28 16:36:06.385 Initialised AES-256 CBC client->server encryption
. 2012-09-28 16:36:06.385 Initialised HMAC-SHA1 client->server MAC algorithm
. 2012-09-28 16:36:06.385 Initialised AES-256 CBC server->client encryption
. 2012-09-28 16:36:06.385 Initialised HMAC-SHA1 server->client MAC algorithm
. 2012-09-28 16:36:06.385 Reading private key file "C:\Users\tkargel\Documents\Visual Studio 2010\Projects\Resolute\ResoportDownload\sftpkey.ppk"
! 2012-09-28 16:36:06.385 Using username "sftpuser2".
. 2012-09-28 16:36:06.385 Offered public key
. 2012-09-28 16:36:06.385 Offer of public key accepted
! 2012-09-28 16:36:06.385 Authenticating with public key "rsa-key-20120928"
. 2012-09-28 16:36:06.401 Sent public key signature
09-28-2012 16:36:06 HOST LT-CND0411CDW.ResoluteEnergy.com SSH sftpuser2 successfully logged on using public key.
. 2012-09-28 16:36:06.401 Access granted
. 2012-09-28 16:36:06.401 Opened channel for session
09-28-2012 16:36:06 SFTP service granted to user sftpuser2.
. 2012-09-28 16:36:06.416 Started a shell/command
. 2012-09-28 16:36:06.416 --------------------------------------------------------------------------
. 2012-09-28 16:36:06.416 Using SFTP protocol.
. 2012-09-28 16:36:06.416 Doing startup conversation with host.
> 2012-09-28 16:36:06.416 Type: SSH_FXP_INIT, Size: 5, Number: -1
< 2012-09-28 16:36:06.416 Type: SSH_FXP_VERSION, Size: 5, Number: -1
. 2012-09-28 16:36:06.416 SFTP version 3 negotiated.
. 2012-09-28 16:36:06.416 We believe the server has signed timestamps bug
. 2012-09-28 16:36:06.416 We will use UTF-8 strings for status messages only
. 2012-09-28 16:36:06.416 Getting current directory name.
. 2012-09-28 16:36:06.416 Getting real path for '.'
> 2012-09-28 16:36:06.416 Type: SSH_FXP_REALPATH, Size: 10, Number: 16
< 2012-09-28 16:36:06.416 Type: SSH_FXP_NAME, Size: 23, Number: 16
. 2012-09-28 16:36:06.416 Real path is '/'
. 2012-09-28 16:36:06.416 Startup conversation with host finished.
< 2012-09-28 16:36:06.416 Script: Active session: [1] sftpuser2@LT-CND0411CDW
> 2012-09-28 16:36:07.118 Script: get -nopermissions -preservetime -transfer="binary" -- "C:\SFTPHome\hostedfiles" "C:\Users\tkargel\Documents\Visual Studio

2010\Projects\Resolute\ResoportDownload\ResoportData\FilesDownloaded"
. 2012-09-28 16:36:07.118 Listing file "C:\SFTPHome\hostedfiles".
> 2012-09-28 16:36:07.118 Type: SSH_FXP_LSTAT, Size: 33, Number: 263
< 2012-09-28 16:36:07.118 Type: SSH_FXP_STATUS, Size: 34, Number: 263
< 2012-09-28 16:36:07.118 Status code: 3, Message: 263, Server: Permission denied, Language:
< 2012-09-28 16:36:07.118 Script: Can't get attributes of file 'C:\SFTPHome\hostedfiles'.
< 2012-09-28 16:36:07.118 Script: Permission denied.
< 2012-09-28 16:36:07.118 Error code: 3
< 2012-09-28 16:36:07.118 Error message from server: Permission denied
< 2012-09-28 16:36:07.118 Request code: 7
. 2012-09-28 16:36:07.118 Script: Failed
> 2012-09-28 16:36:09.463 Script: exit
. 2012-09-28 16:36:09.464 Script: Exit code: 1
. 2012-09-28 16:36:09.464 Closing connection.
. 2012-09-28 16:36:09.464 Sending special code: 12
. 2012-09-28 16:36:09.464 Sent EOF message
09-28-2012 16:36:09 HOST LT-CND0411CDW.ResoluteEnergy.com SSH sftpuser2 disconnected.
martin
[View user's profile]
Site Admin
Joined: 2002-12-10
Posts: 24512
Location: Prague, Czechia
Looks like freeSSHd deficiency.
Anyway, supposing "hostedfiles" and "FilesDownloaded" are folders, add slash and backslash at the end of the paths respectively. It won't work without them in any case and might actually help overcome the problem.
tkargel
[View user's profile]

Joined: 2012-10-01
Posts: 2
prikryl wrote:
Looks like freeSSHd deficiency.
Anyway, supposing "hostedfiles" and "FilesDownloaded" are folders, add slash and backslash at the end of the paths respectively. It won't work without them in any case and might actually help overcome the problem.


Thank you so much for your help. Everything worked perfectly after applying appropriate slashes. I'm new to both WinSCP and freeSSHd and struggling with the nuances. So far, I'm very pleased with the WinSCP .NET Assembly.
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