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Full Discussion: SSH on a Shell Script
Top Forums UNIX for Dummies Questions & Answers SSH on a Shell Script Post 302772742 by DGPickett on Tuesday 26th of February 2013 03:55:17 PM
Old 02-26-2013
Yes, we answer this a lot. To discourage scripting with a password, it is read from /dev/tty not stdin.
  1. You should set up PPKey authentication and not use a password. I think there are alternatives to RSA, some free. Why can't they turn it on? Confused security policy makers?
  2. If you are incurably into bad security, use expect to drive ssh so you can write a password from the script through expect's pseudo tty. You could also use 'ssh localhost' trusted PPKey to set up such an intermediate pseudo tty.
  3. You could set up reverse trust and have a process on their end connect to you: once connected, you can achieve the same thing.
  4. You could achieve the same result with another secure service, like https.
This User Gave Thanks to DGPickett For This Post:
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LEARN ABOUT SUNOS

systemd-tty-ask-password-agent

SYSTEMD-TTY-ASK-PASSWORD-AGENT(1)			  systemd-tty-ask-password-agent			 SYSTEMD-TTY-ASK-PASSWORD-AGENT(1)

NAME

       systemd-tty-ask-password-agent - List or process pending systemd password requests

SYNOPSIS

       systemd-tty-ask-password-agent [OPTIONS...] [VARIABLE=VALUE...]

DESCRIPTION

       systemd-tty-ask-password-agent is a password agent that handles password requests of the system, for example for hard disk encryption
       passwords or SSL certificate passwords that need to be queried at boot-time or during runtime.

       systemd-tty-ask-password-agent implements the Password Agents Specification[1], and is one of many possible response agents which answer to
       queries formulated with systemd-ask-password(1).

OPTIONS

       The following options are understood:

       --list
	   Lists all currently pending system password requests.

       --query
	   Process all currently pending system password requests by querying the user on the calling TTY.

       --watch
	   Continuously process password requests.

       --wall
	   Forward password requests to wall(1) instead of querying the user on the calling TTY.

       --plymouth
	   Ask question with plymouth(8) instead of querying the user on the calling TTY.

       --console
	   Ask question on /dev/console instead of querying the user on the calling TTY.

       -h, --help
	   Print a short help text and exit.

       --version
	   Print a short version string and exit.

EXIT STATUS

       On success, 0 is returned, a non-zero failure code otherwise.

SEE ALSO

       systemd(1), systemctl(1), systemd-ask-password-console.service(8), wall(1), plymouth(8)

NOTES

	1. Password Agents Specification
	   https://www.freedesktop.org/wiki/Software/systemd/PasswordAgents

systemd 237													 SYSTEMD-TTY-ASK-PASSWORD-AGENT(1)
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