Uly.me

cloud engineer

Display Asterisks When Typing Passwords in Bash

Here’s how to display asterisks when typing passwords in Bash.

#!/bin/bash
unset password
prompt="Enter Password:"
while IFS= read -p "$prompt" -r -s -n 1 char
do
    if [[ $char == $'\0' ]]
    then
        break
    fi
    prompt='*'
    password+="$char"
done
echo
echo "Done. Password=$password"

Checking What SSL and TLS Are In Use

Here’s another command to check what version of SSL and TLS is being used.

nmap --script ssl-enum-ciphers -p 443 server.domain.com

Result

PORT    STATE SERVICE
443/tcp open  https
| ssl-enum-ciphers: 
|   TLSv1.2: 
|     ciphers:
...

In this example, only TLSv1.2 is in use. For security purposes, use TLSv1.2 or higher.

What Requires OpenSSL

Here’s the command to list what app or package requires OpenSSL.

repoquery --whatrequires --installed --recursive openssl

Result

authconfig-0:6.2.8-30.el7.x86_64
falcon-sensor-0:6.38.0-13501.el7.x86_64
python2-cryptography-0:1.7.2-2.el7.x86_64
realmd-0:0.16.1-12.el7_9.1.x86_64
terraform-0:1.3.6-1.x86_64