Magesh Arul created SSHD-367:
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Summary: File Listing fails for SFTP Protocol version 4 and 5 when
using org.apache.sshd.sftp.subsystem.SftpSubsystem
Key: SSHD-367
URL: https://issues.apache.org/jira/browse/SSHD-367
Project: MINA SSHD
Issue Type: Bug
Affects Versions: 0.11.0
Reporter: Magesh Arul
File listing with org.apache.sshd.sftp.subsystem.SftpSubsystem fails in WinSCP
client as it uses SFTP protocol version 5 by default.
This is also mentioned in issue
https://issues.apache.org/jira/browse/SSHD-325
This could however be avoided by forcing WinSCP to use SFTP Protocol version 3.
Cause of the issue :
The problem here is in sending of the fIle atrributes back to the client.
In org.apache.sshd.sftp.subsystem.SftpSubsystem, line 668
Method sendName uses,
int flags = SSH_FILEXFER_ATTR_PERMISSIONS | SSH_FILEXFER_ATTR_SIZE |
SSH_FILEXFER_ATTR_ACCESSTIME;
Whereas in org.apache.sshd.sftp.subsystem.Serializer.writeAttrs() Access time
attribute is not added to the buffer.
This causes a decode issue on the client side.
Fix :
Remove flag SSH_FILEXFER_ATTR_ACCESSTIME as we are not writing it back to the
client.
In org.apache.sshd.sftp.subsystem.SftpSubsystem.sendName()
line 668
Change to
int flags = SSH_FILEXFER_ATTR_PERMISSIONS | SSH_FILEXFER_ATTR_SIZE;
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