libssh 0.8.4 with Cisco router

[jijo thomas <jijo7thomas@xxxxxxxxx>]

Hi,

I compiled libssh 0.8.4 in Windows

Then ran into a strange issue with libssh 0.8.4 while working with Cisco
router (ios ver 15.4) while executing the sample exec.c from the bundle.

The ssh connection to the device is getting established alternatively. ie)
It fails once at analyzing banner. if I try again, it'll work fine.

Following is the log.

Attempt 1
exec.exe x.x.x.x
[2018/10/23 11:43:55.012458, 2] ssh_connect:  libssh 0.8.4 (c) 2003-2018
Aris Ad
amantiadis, Andreas Schneider and libssh contributors. Distributed under
the LGP
L, please refer to COPYING file for information about your rights, using
threadi
ng threads_winlock
[2018/10/23 11:43:55.015458, 2] ssh_socket_connect:  Nonblocking connection
sock
et: 196
[2018/10/23 11:43:55.016458, 2] ssh_connect:  Socket connecting, now
waiting for
 the callbacks to work
[2018/10/23 11:43:55.531488, 1] socket_callback_connected:  Socket
connection ca
llback: 1 (0)
[2018/10/23 11:43:56.128522, 1] ssh_client_connection_callback:  SSH server
bann
er: SSH-2.0-Cisco-1.25
[2018/10/23 11:43:56.129522, 1] ssh_analyze_banner:  Analyzing banner:
SSH-2.0-C
isco-1.25
[2018/10/23 11:44:05.018031, 1] ssh_connect:  Timeout connecting to x.x.x.x
Connection failed : Timeout connecting to x.x.x.x

Attempt 2

exec.exe x.x.x.x
[2018/10/23 11:59:31.880044, 2] ssh_connect:  libssh 0.8.4 (c) 2003-2018
Aris Ad
amantiadis, Andreas Schneider and libssh contributors. Distributed under
the LGP
L, please refer to COPYING file for information about your rights, using
threadi
ng threads_winlock
[2018/10/23 11:59:31.882044, 2] ssh_socket_connect:  Nonblocking connection
sock
et: 196
[2018/10/23 11:59:31.883044, 2] ssh_connect:  Socket connecting, now
waiting for
 the callbacks to work
[2018/10/23 11:59:32.391073, 1] socket_callback_connected:  Socket
connection ca
llback: 1 (0)
[2018/10/23 11:59:32.899102, 1] ssh_client_connection_callback:  SSH server
bann
er: SSH-2.0-Cisco-1.25
[2018/10/23 11:59:32.900102, 1] ssh_analyze_banner:  Analyzing banner:
SSH-2.0-C
isco-1.25
[2018/10/23 11:59:32.905103, 2] ssh_kex_select_methods:  Negotiated
diffie-hellm
an-group14-sha1,ssh-rsa,aes256-ctr,aes256-ctr,hmac-sha1,hmac-sha1,none,none,,
[2018/10/23 11:59:34.053168, 2] ssh_packet_dh_reply:  Received
SSH_KEXDH_REPLY
[2018/10/23 11:59:34.064169, 2] ssh_client_dh_reply:  SSH_MSG_NEWKEYS sent
[2018/10/23 11:59:34.561197, 2] ssh_packet_newkeys:  Received
SSH_MSG_NEWKEYS
[2018/10/23 11:59:34.563197, 2] ssh_packet_newkeys:  Signature verified and
vali
d
[2018/10/23 11:59:35.793268, 1] ssh_packet_userauth_failure:  Access denied
for
'none'. Authentication that can continue:
publickey,keyboard-interactive,passwor
d
[2018/10/23 11:59:35.794268, 2] ssh_packet_userauth_failure:  Access denied
for
'none'. Authentication that can continue:
publickey,keyboard-interactive,passwor
d

.
.
.

[2018/10/23 11:59:35.803268, 2] ssh_userauth_publickey_auto:  Tried every
public
 key, none matched
Password:
[2018/10/23 11:59:38.955449, 2] channel_open:  Creating a channel 43 with
64000
window and 32768 max packet
[2018/10/23 11:59:39.463478, 2] ssh_packet_channel_open_conf:  Received a
CHANNE
L_OPEN_CONFIRMATION for channel 43:3
[2018/10/23 11:59:39.464478, 2] ssh_packet_channel_open_conf:  Remote
window : 8
192, maxpacket : 4096
[2018/10/23 11:59:39.974507, 2] channel_request:  Channel request exec
success
[2018/10/23 11:59:39.975507, 2] grow_window:  growing window (channel 43:3)
to 1
280000 bytes

22:29:39.716 PST Mon Oct 22 2018