Encrypt and decrypt a password in shell script


 
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# 1  
Old 02-27-2015
Question Encrypt and decrypt a password in shell script

Hi All,

very good morning all.

I am trying to connect to informatica repository by using shell script.
I have written pmrep connect command in the script file. But i need to provide repository, domain ,username and password to connect. Username and password are hard coded in the script file which is not recommanded. So i tried to encrypt the password and save it in a file. After that i dont know how to use that encrypted password during script file execution.

Can anyone suggest me how to decrypt the password from the file and it needs to be connected to the repository as well. And also provide me the sample script file to understand better.

Thanks in advance....
# 2  
Old 02-27-2015
The method used to encrypt the password, should also be providing way to decrypt it too!?
# 3  
Old 02-27-2015
If i decrypt that password it can be saved in a file. but how can it be used in the script file. I mean, i want to store it in variable insdie script file and it can be used.

my Question is: how to store that decrypted password in a variable . How to assign it to a variable.

For encryption i used below command:
Code:
openssl das3 -salt -in file.txt -out file.des3

For decryption i used below command:
Code:
openssl das3 -salt -in file.des3 -out file1.txt

if i do with above command the decrypted password will be saved in file1.txt
i want to assign it to variable. and it can be used in my connect command.
is this the way to assign it to variable?
Code:
dec_pwd=openssl das3 -salt -in file.des3 -out file1.txt

or any other command to redirect to a variable.
or how can i read the decrypted password from file1.txt

please let me know.
thanks in advance...

Last edited by Scrutinizer; 02-27-2015 at 04:22 AM.. Reason: code tags
# 4  
Old 02-27-2015
Have you checked openssl man pages? there must be some options to to deal with STDIN and STDOUT.

regarding your issue, you can same file content to a variable

Code:
var=$(cat file1.txt)

Please note, there must be nothing else in the file except the password
# 5  
Old 02-27-2015
Thanks for your reply clx.
But if i check in file1.txt it contains the normal password i.e not recommonded. So everyone can see my password in the file1.txt .
Actually file.des3 is having encrypted password.
So i am looking for the command which will decrypt the encrypted password from file.des3 and store it in a variable .
So that i can use that variable and can connect to repository.

is it possible?
Please let me know.
All the suggestions are accepted.
# 6  
Old 02-27-2015
Well you can control the file permissions.

Just by chance, can you try removing -out file1.txt part and see if the password is being displaying on the screen.

If yes,

Code:
var=$(openssl das3 -salt -in file.des3)

# 7  
Old 02-27-2015
thanks for quick reply.

The command var=$(openssl das3 -salt -in file.des3) is not working because it is prompting for the user credentials in the unix system.
While script file is running in informatica it shouldnot prompt.So it is keep on running and it shouldnot complete.

Any other way to do it.

thanks in advance.

Last edited by Don Cragun; 02-27-2015 at 09:26 AM.. Reason: Add ICODE tags.
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