When SSH_AUTH_KEY failed will not try to auth with SSH_AUTH_PASS when use libssh

[zuoxiaofeng]

My ssh server supported following: publickey,password,keyboard-interactive

When I try to request sftp dir list or download file from server got "Authentication failure", the debug log show that curl only have try publickey and keyboard-interactive to do auth but haven't try "password".

When I disable keyboard-interactive auth method in my server curl will try password to auth.

The keyboard-interactive auth method in my server seems cannot work well with some config issue, but the ssh command will also try to auth with password method even when keyboard-interactive failed.

• !!! WARNING !!!
• This is a debug build of libcurl, do not use in production.
• STATE: INIT => CONNECT handle 0xca6d98; line 1951 (connection #-5000)
• Added connection 0. The cache now contains 1 members
• STATE: CONNECT => CONNECTING handle 0xca6d98; line 2004 (connection #0)
• Trying 10.240.196.10:33...
• Connected to 10.240.196.10 (10.240.196.10) port 33 (#0)
• STATE: CONNECTING => PROTOCONNECT handle 0xca6d98; line 2112 (connection #0)
• User: lxce_sftp
• SSH 0xca5e58 state change from SSH_STOP to SSH_INIT (line 2268)
• SSH 0xca5e58 state change from SSH_INIT to SSH_S_STARTUP (line 708)
• STATE: PROTOCONNECT => PROTOCONNECTING handle 0xca6d98; line 2139 (connection #0)
• SSH 0xca5e58 state change from SSH_S_STARTUP to SSH_HOSTKEY (line 722)
• SSH 0xca5e58 state change from SSH_HOSTKEY to SSH_AUTHLIST (line 733)
• SSH 0xca5e58 state change from SSH_AUTHLIST to SSH_AUTH_PKEY_INIT (line 757)
• Authentication using SSH public key file
• SSH 0xca5e58 state change from SSH_AUTH_PKEY_INIT to SSH_AUTH_KEY_INIT (line 829)
• SSH 0xca5e58 state change from SSH_AUTH_KEY_INIT to SSH_AUTH_KEY (line 876)
• SSH 0xca5e58 state change from SSH_AUTH_KEY to SSH_AUTH_DONE (line 894)
• Authentication failure
• SSH 0xca5e58 state change from SSH_AUTH_DONE to SSH_SESSION_DISCONNECT (line 926)
• SSH 0xca5e58 state change from SSH_SESSION_DISCONNECT to SSH_SESSION_FREE (line 1967)
• SSH 0xca5e58 state change from SSH_SESSION_FREE to SSH_STOP (line 2015)
• multi_done: status: 67 prem: 1 done: 0
• multi_done, not re-using connection=0, forbid=0, close=1, premature=1, conn_multiplex=0
• The cache now contains 0 members
• Curl_disconnect(conn #0, dead=1)
• SSH DISCONNECT starts now
• SSH DISCONNECT is done
• Closing connection 0
• Expire cleared (transfer 0xca6d98)
  curl: (67) Authentication failure

$ curl -V
curl 7.76.1 (x86_64-redhat-linux-gnu) libcurl/7.76.1 OpenSSL/3.0.7 zlib/1.2.11 brotli/1.0.9 libidn2/2.3.0 libpsl/0.21.1 (+libidn2/2.3.0) libssh/0.10.4/openssl/zlib nghttp2/1.43.0
Release-Date: 2021-04-14
Protocols: dict file ftp ftps gopher gophers http https imap imaps ldap ldaps mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp
Features: alt-svc AsynchDNS brotli GSS-API HTTP2 HTTPS-proxy IDN IPv6 Kerberos Largefile libz NTLM NTLM_WB PSL SPNEGO SSL TLS-SRP UnixSockets

I did this

I expected the following

curl/libcurl version

[curl -V output]

operating system