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Supply passphrase for ssh in script

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# 1  
Old 05-18-2016
Supply passphrase for ssh in script
I would like to write a bash shell script which will connect to remote server using passphrase. (I have public-private infrastructure created, and as per instruction, I must not use password less ssh).
This particular script will be fired from cron.

Can you please advice how I can supply the passphrase (from any file or any other way) in the script ?
# 2  
Old 05-18-2016
If that "instruction" is based on "security considerations", please be aware that supplying authentication from within a script or even a file is way less secure than e.g. ssh's public key method!
# 3  
Old 05-18-2016
Thank you so much RudiC for the advice. Yes we will try to make it secure. I tried ssh-add, sshpass, keychain.... but nothing is working.

Please advice.

---------- Post updated at 06:50 AM ---------- Previous update was at 05:55 AM ----------

Got the solution.

1. Store the password in file or environment variable.
Code:
export MYPASS=XXXXX

2. Export DISPLAY environment variable with some value
Code:
export DISPLAY=1

3. Create a helper file
Code:
#!/bin/bash
exec cat

4. Execute ssh-add
Code:
echo $MYPASS|SSH_ASKPASS=./helperfile.sh ssh-add ~/.ssh/id_rsa


Moderator's Comments:
Mod Comment Thanks for using tags, but: Please use code tags (not HTML tags) as required by forum rules!
Last edited by RudiC; 05-18-2016 at 08:15 AM.. Reason: Changed HTML to CODE tags.
This User Gave Thanks to atanubanerji For This Post:
rbatte1
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