On 2/17/21 5:13 PM, tangying212 wrote:
Hello Andreas,
Uhm,
Can you please share the solution/guide/instructions/setup to customize the
banner before using the ssh_connect() function.I found the custombanner in the
struct ssh_session->opt, but I don't know how to use it.please help me,thanks.
Hi,
it looks like libssh does not allow changing this in the client
applications through API. That part of string is usually used by
applications which can use it to detect various bugs or specification
deviations (at least in case of OpenSSH, there is whole bunch of compat
code). So unless you have really good reason to change it, I would try
to avoid it.
The custombanner is used only in the server side of libssh and requires
using private header file session.h to access the internal session
variable session->opts.custombanner.
If there is a good reason to use different banner, I would suggest to
update the function ssh_send_banner() in client.c to use the
custombanner and update options.c to allow setting this through
ssh_options_set(session, SSH_OPTIONS_CUSTOM_BANNER, "the banner").
Best regards,
--
Jakub Jelen
Senior Software Engineer
Crypto Team, Security Engineering
Red Hat, Inc.
