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[vox-tech] GPG Symmetric Encryption - Noninteractively
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[vox-tech] GPG Symmetric Encryption - Noninteractively

Hi All,

Can I do symmetric encryption non-interactively using gpg?

gpg -batch -ca doesn't seem to work as the key cannot be provided in some file or command line.

Tried writing a expect script,
#!/usr/bin/expect -d -f

set timeout -1
set send_slow {1 .1}
set send_human {.1 .3 1 .05 2}
spawn gpg -q -o message.enc -ca message
match_max 100000
expect -exact "Enter passphrase: "
send -- "ab\r"
expect -exact "\r \rRepeat passphrase: "
send -- "ab\r"
expect eof

This script works sometimes, hangs mostly after first/second passphrase has been sent. Tried "send -s/h" but they also fail. What's wrong? Am I missing something?

Also if the expect script can read the input from stdin and write encrypted output to stdout, it would be great. Any help/suggestion is appreciated.


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