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Top Forums Shell Programming and Scripting Copy-paste string automatically Post 302349504 by ktm on Tuesday 1st of September 2009 06:36:06 AM
Old 09-01-2009
Copy-paste string automatically

Hi i'm not really sure if it's possible or not in bash. Basically I want to convert a ssh key created with ssh-keygen to putty format. The problem is that puttygen doesn't have an option for supplying passphrase in batch mode so it must be entered manually. For sskey generated with ssh-keygen i use a random passphrase and I don't know the passphrase until I send it to my email.
Of course that the passphrase is kept in a variable.

The question is , can i enter automatically the passphrase when certain input is required from the user ? (ie when puttygen asking for passphrase).

I know I can temporary echo the passphrase in bash but it isn't quite what I'm looking for.

Thank you.
 

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SSH-KEYSIGN(8)						    BSD System Manager's Manual 					    SSH-KEYSIGN(8)

NAME
ssh-keysign -- ssh helper program for host-based authentication SYNOPSIS
ssh-keysign DESCRIPTION
ssh-keysign is used by ssh(1) to access the local host keys and generate the digital signature required during host-based authentication with SSH protocol version 2. ssh-keysign is disabled by default and can only be enabled in the global client configuration file /etc/ssh/ssh_config by setting EnableSSHKeysign to ``yes''. ssh-keysign is not intended to be invoked by the user, but from ssh(1). See ssh(1) and sshd(8) for more information about host-based authen- tication. FILES
/etc/ssh/ssh_config Controls whether ssh-keysign is enabled. /etc/ssh/ssh_host_dsa_key /etc/ssh/ssh_host_ecdsa_key /etc/ssh/ssh_host_rsa_key These files contain the private parts of the host keys used to generate the digital signature. They should be owned by root, read- able only by root, and not accessible to others. Since they are readable only by root, ssh-keysign must be set-uid root if host- based authentication is used. Note that ssh-keysign is not set-uid by default on Mac OS X. /etc/ssh/ssh_host_dsa_key-cert.pub /etc/ssh/ssh_host_ecdsa_key-cert.pub /etc/ssh/ssh_host_rsa_key-cert.pub If these files exist they are assumed to contain public certificate information corresponding with the private keys above. SEE ALSO
ssh(1), ssh-keygen(1), ssh_config(5), sshd(8) HISTORY
ssh-keysign first appeared in OpenBSD 3.2. AUTHORS
Markus Friedl <markus@openbsd.org> BSD
August 31, 2010 BSD

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