by Ron Eggle » Wed, 19 Mar 2008 07:04:44
I'm trying to create an ssh key automatically with no passphrase but
ssh-keygen -q -f ~/.ssh/id_rsa -t rsa -N="" would tell me:
passphrase too short: have 1 bytes, need > 4
How am I able to create a key for automatic file exchange with no human
interaction?
Thank you!
Ron
by Ron Eggle » Wed, 19 Mar 2008 07:24:31
> I'm trying to create an ssh key automatically with no passphrase but
> ssh-keygen -q -f ~/.ssh/id_rsa -t rsa -N="" would tell me:
> passphrase too short: have 1 bytes, need > 4
> How am I able to create a key for automatic file exchange with no human
> interaction?
> Thank you!
> Ron
by Joe Beasle » Wed, 19 Mar 2008 11:18:58
>> Hi,
>> I'm trying to create an ssh key automatically with no passphrase but
>> ssh-keygen -q -f ~/.ssh/id_rsa -t rsa -N="" would tell me:
>> passphrase too short: have 1 bytes, need > 4
>> How am I able to create a key for automatic file exchange with no human
>> interaction?
>> Thank you!
>> Ron
> Ah, I'm not sure if I got it, I tried:
> ssh-keygen -N '' -C backup1 -t rsa -f ~/.ssh/id_rsa
> and copied the ~/.ssh/id_rsa.pub porrtion into the server's
> ~/.ssh/known_hosts but for some reason it wouldn't let me in... :( Any
> ideas what i could have done wrong? Or is my keygen command "corrupt"?
> Thank you!
by Ron Eggle » Thu, 20 Mar 2008 01:33:53
>>> Hi,
>>> I'm trying to create an ssh key automatically with no passphrase but
>>> ssh-keygen -q -f ~/.ssh/id_rsa -t rsa -N="" would tell me:
>>> passphrase too short: have 1 bytes, need > 4
>>> How am I able to create a key for automatic file exchange with no human
>>> interaction?
>>> Thank you!
>>> Ron
>> Ah, I'm not sure if I got it, I tried:
>> ssh-keygen -N '' -C backup1 -t rsa -f ~/.ssh/id_rsa
>> and copied the ~/.ssh/id_rsa.pub porrtion into the server's
>> ~/.ssh/known_hosts but for some reason it wouldn't let me in... :( Any
>> ideas what i could have done wrong? Or is my keygen command "corrupt"?
>> Thank you!
> Leave out the -N option. This will prompt you for a password, and let
> you hit enter for a blank password.
--
chEErs roN
by Andrew Gideo » Thu, 20 Mar 2008 01:56:51
known_hosts doesn't solve the client authentication problem (let me
login!) but the server authentication problem (is the server into which
I'm logging in really what I think it is?).
BTW, I'd not generally name the key id_rsa. That has a special meaning.
I'd call it something else, and then explicitly use it either via "ssh -i
keyname" or by placing an entry for the server in the client login's
~/.ssh/config file.
- Andrew
1. creating ssh key with no passphrase
Hi, I also want to be able to create a passphrase-less ssh-key without
any user interaction (like the original poster), but from a batch
script... The funny thing is this:
-- this line, directly typed in the shell, works:
$ ssh-keygen -N '' -C 'comment' -t rsa -b 1024 -f /mydir/usr2-
blahblah.key
Generating public/private rsa key pair.
Your identification has been saved in /mydir/usr2-blahblah.key.
Your public key has been saved in /mydir/usr2-blahblah.pub.
The key fingerprint is: ...
-- however, when I try to toss it into a variable, and execute the
variable contents, it doesn't:
$ mycmd="ssh-keygen -N '' -C 'comment' -t rsa -b 1024 -f /mydir/usr2-
blahblah.key"
$ echo $mycmd
ssh-keygen -N '' -C 'comment' -t rsa -b 1024 -f /mydir/usr2-
blahblah.key
$ $mycmd
Generating public/private rsa key pair.
passphrase too short: have 2 bytes, need > 4
Saving the key failed: /mydir/usr2-blahblah.key.
Apparently, it interprets the quotes in the second case as literal
password characters instead of string delimiters.. Btw, none of the
escaping possibilities work:
$ mycmd="ssh-keygen -N '' -C 'comment' -t rsa -b 1024 -f /mydir/usr2-
blahblah.key"
$ mycmd="ssh-keygen -N \'\' -C 'comment' -t rsa -b 1024 -f /mydir/usr2-
blahblah.key"
$ mycmd="ssh-keygen -N \"\" -C 'comment' -t rsa -b 1024 -f /mydir/usr2-
blahblah.key"
$ mycmd="ssh-keygen -N """" -C 'comment' -t rsa -b 1024 -f /mydir/usr2-
blahblah.key"
... I need this because I want to do something like:
mycmd="ssh-keygen -N '${PASSWDVAR}' -C 'comment' -t rsa -b 1024 -f /
mydir/usr2-blahblah.key"
where PASSWDVAR would be passed to the bash script - and this in fact
works fine, for all cases but when $PASSWDVAR is empty string...
Any help to achieve what I'd want?
Thanks...
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