Encrypt & Decrypt message with AES using OpenSSL

_openssl-aes-encryption-cmd.md

Requires OpenSSL version 1.1.1

Encrypt

$ echo -n "message to encrypt"| openssl enc -e -aes-256-ctr -nopad -base64 -pbkdf2 -iter 99999 -k secret -S 9876598765
U2FsdGVkX1+YdlmHZQAAANi/ijMqF9vFCC9lCzdkBNNBTg==

Decrypt

$ echo "U2FsdGVkX1+YdlmHZQAAANi/ijMqF9vFCC9lCzdkBNNBTG==" | openssl enc -d -aes-256-ctr -nopad -base64 -pbkdf2 -iter 99999 -k secret -S 9876598765

dec.sh

#!/usr/bin/env bash
a=$1
b=$2
c=$3
m=$4
echo "$m" | openssl enc -d -aes-256-ctr -nopad -base64 -pbkdf2 -iter 99999 -k $a$b -S $c

enc.sh

#!/usr/bin/env bash
a=$1
b=$2
c=$3
m=$4
echo -n "$m" | openssl enc -e -aes-256-ctr -nopad -base64 -pbkdf2 -iter 99999 -k $a$b -S $c