try ow decryption algorithms.sh

#!/bin/env bash

# depends on a file named full.bin containing the base64 decoded contents of the message
# yes this is a mess, sorry I'm in a rush

CIPHERS="aes-128-cbc
aes-128-ecb
aes-192-cbc
aes-192-ecb
aes-256-cbc
aes-256-ecb
base64
bf
bf-cbc
bf-cfb
bf-ecb
bf-ofb
cast
cast-cbc
cast5-cbc
cast5-cfb
cast5-ecb
cast5-ofb
des
des-cbc
des-cfb
des-ecb
des-ede
des-ede-cbc
des-ede-cfb
des-ede-ofb
des-ede3
des-ede3-cbc
des-ede3-cfb
des-ede3-ofb
des-ofb
des3
desx
rc2
rc2-40-cbc
rc2-64-cbc
rc2-cbc
rc2-cfb
rc2-ecb
rc2-ofb
rc4
rc4-40
seed
seed-cbc
seed-cfb
seed-ecb
seed-ofb"

for cipher in $CIPHERS; do
    base_cmd="openssl $cipher -d -in full.bin -out foo.$cipher.out -k notthepassword"
    rm -f foo.$cipher.out
    $base_cmd 2>/dev/null
    if [ $? = 0 ]; then
        echo "# ${cipher}"
    fi
done

# to run, decode the base64 message into a file named full.bin
#
# output

# base64
# bf-cfb
# bf-ofb
# cast5-cfb
# cast5-ofb
# des-cfb
# des-ede-cfb
# des-ede-ofb
# des-ede3-cfb
# des-ede3-ofb
# des-ofb
# rc2-cfb
# rc2-ofb
# rc4
# rc4-40
# seed-cfb
# seed-ofb