Cannot read encrypted password in shell script-CodePudding

I'm trying to connect to a Tableau Server using an encrypted password. The usual command to connect is:

tabcmd login -u user -p password

I have encrypted a password and stored it into a text file with the following script.

echo "strongpw" | openssl enc -aes-256-cbc -md sha512 -a -pbkdf2 -iter 100000 \
-salt -pass pass:Secret@123# > secret.txt

strongpw being the string I want to encrypt
Secret@123# being the password that is used during the encryption

Once that done, I have a secret.txt file with something like this:

U2FsdGVkX1/VyNZZ/RTaymM4F5DHNNG0iYapp3u3 WI=

I can then use the following script to decrypt my password:

cat secret.txt | openssl enc -aes-256-cbc -md sha512 -a -d -pbkdf2 -iter 100000 \
 -salt -pass pass:Secret@123#

output: strongpw

Finally, I created an .sh script the user might execute to connect to the server. The script is supposed to decrypt the password and store it in the variable.

#bin/bash

USERNAME=test
PASSWD=`cat secret.txt | openssl enc -aes-256-cbc -md sha512 -a -d -pbkdf2 \ 
-iter 100000 -salt -pass pass:Secret@123#`

tabcmd login -u $USERNAME -p $PASSWD

I then made my script executable with chmod x

Unfortunately, when trying to running, I'm always encountering either invalid argument or extra arguments given as errors.

Any suggestion on how to fix this?

Thank you!

CodePudding user response：

maybe you can try with the '-in' tag to provide the input file instead of using cat?

CodePudding user response：

Thanks to @MarcoLucidi for showing me shellcheck.net :)

Here's how I had to modify my .sh file to make it work:

#bin/bash

USERNAME=test
var=$(cat secret.txt | openssl enc -aes-256-cbc -md sha512 -a -d -pbkdf2 -iter 100000 \
 -salt -pass pass:Secret@123#)
tabcmd login -u “$USERNAME” -p “$var”
tabcmd runschedule "PMS Daily 6AM"