Hi all,
I must use SFTP (SSH) to send one file in a server. With Filezilla all are OK. But with libcurl I have ‘Failed initialization’ error and I don’t know how can I fix it. All the parameters are OK and wiht Filezilla I can send the file correct. Can anyone help me?
Thanks in advance!
Michael Diamantidis
Vision Computer Applications
Greece
See in DebugView what happens.
Hello Mike and thank you for your help.
The error that I have is : TEXT: SSH public key authentication failed: Unable to extract public key from private key file: Unable to open private key file
But I don’t have any “public key”.
Thanks in advance!
Play with settings on SSH tab, usually “Any” is good choice.
Already I do that and the error still remains.
Also I have a compile error : Unknown identifier: SSH:PUBLICKEYMD5.
LOG:
Reset: Curl Reset
SSHAuth: Set
SetOpt (Port): Set
SetOpt (Usr/Pwd): Set
SetOpt (Timeout): Set
Build URL: sftp://visioncagr@m02.fastpath.gr
Trailing /: sftp://visioncagr@m02.fastpath.gr/
Append Remote Dir: sftp://visioncagr@m02.fastpath.gr//home/visioncagr/www/Downloads
Trailing /: sftp://visioncagr@m02.fastpath.gr//home/visioncagr/www/Downloads/
Build Remote File Name: sftp://visioncagr@m02.fastpath.gr//home/visioncagr/www/Downloads/soft1_Test.json
File Size: 4103743
Upload Started: 8:04 ìì
TEXT: Trying 185.51.135.119:22…
TEXT: TCP_NODELAY set
TEXT: Connected to m02.fastpath.gr (185.51.135.119) port 22 (#0)
TEXT: SSH MD5 fingerprint: a08cc17516aef28113349269596b33cf
TEXT: SSH authentication methods available: publickey,password,keyboard-interactive
TEXT: Using SSH private key file ‘’
TEXT: SSH public key authentication failed: Unable to extract public key from private key file: Unable to open private key file
TEXT: Initialized password authentication
TEXT: Authentication complete
TEXT: Failure initializing sftp session: Unable to request SFTP subsystem
TEXT: Closing connection 0
Upload Finished: 8:04 ìì
File Upload: Upload failed
Thanks in advance!
PublicKeyMD5 field was introduced in v1.37, current is 1.48.
Regarding “Failure initializing sftp session: Unable to request SFTP subsystem” error - never seen this before, google forwards to libssh2 library, which is used by libcurl, so maybe recent builds fix this issue.
Thank you Mike for your help. I have the latest realease 1.48. So I must be wait for a new release?
I found similar question here, not related to curl though, and with no reasonable answer.
Another similar thread. What I think is sftp server configuration is not correct. FileZilla knows how to bypass this, curl doesn’t.
I don’t think so. libssh2 just reports that something goes wrong on server side.
Look at FileZilla log, if it has something like this
2013-05-07 08:16:15 2704 3 Traza: Opened channel for session
2013-05-07 08:16:15 2704 3 Traza: Primary command failed; attempting fallback
then something wrong on the server.
My Host Provider solve the problem and the file is uploaded with success. Thanks again!
I have same problem and not sure why…