ccrypt with expect - The Tcl programming language

21d0 ccrypt with expect - The Tcl programming language

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ccrypt with expect

Posted by neo (The Architect), 27 August 2005

Has anyone written an expect script that uses 'ccrypt' to encrypt a file.
I tried expecting the 'Enter encryption key: ' but the password that I send is then displayed on the screen.

Posted by admin (Graham Ellis), 27 August 2005

Code:

log_user 0
spawn ./ccrypt -e demoenc.txt
expect "Enter encryption key: "
send "abc123\r"
expect "(repeat) "
send "abc123\r"
expect eof

worked for me ....

Posted by neo (The Architect), 27 August 2005

I'm using CYGWIN and the code you gave did not work.

It just hangs, I removed the log_user 0 and then saw the password being typed out in plaintext.

Posted by admin (Graham Ellis), 27 August 2005

on 08/27/05 at 11:00:24, The Architect wrote:

I'm using CYGWIN and the code you gave did not work. ....

Expect sits on top of the applications and operating system, and as such it needs fine tuning and adjustment sometimes. Have a careful look at how the script runs without the log_user line and that should lead you to learn where it's failing in more detail, and from that it should lead you to a solution. I'm afraid I don't have Cygwyn to hand, so I can't easily help further with this issue that has turned out to be OS specific.

Posted by neo (The Architect), 29 August 2005

I am using the -K option to specify the password along with the command right now.
I have another (not actually related) doubt though.
Can I pause my script halfway and ask the user for a password and then resume the script?
I tried
Code:

interact{
-re ".*\r" { send_user "got it\n";}
}

but it just keeps on in the loop.

Posted by admin (Graham Ellis), 29 August 2005

An interact keeps running until it hits a return command in its deffered block. You don't have one, so your interact won't exit.

Posted by neo (The Architect), 29 August 2005

In english please?

Posted by admin (Graham Ellis), 29 August 2005

on 08/29/05 at 11:14:57, The Architect wrote:

In english please?

Sorry - I mis-spelled that. Should have been deferred rather than deffered. It DID look a bit odd that other way, didn't it?

Posted by neo (The Architect), 11 September 2005

Yeah it did.

And yeah I still don't understand it too.

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