Test TLS SSL Ciphers on a Server - Which Ciphers and TLS Protocols does the server support?

tls.sh

#!/bin/zsh

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## Usage
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##
## ./tls.sh <SERVER_IP_OR_DOMAIN_NAME>
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## ./tls.sh pubnub.com
## ./tls.sh ps.pndsn.com
## ./tls.sh pubsub.pubnub.com
## ./tls.sh pubsub-legacy-sslv3.pubnub.com
## ./tls.sh google.com
## ./tls.sh yahoo.com
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SERVER=$1

for v in ssl2 ssl3 tls1 tls1_1 tls1_2; do
    for c in $(openssl ciphers 'ALL:eNULL' | tr ':' ' '); do
        result=$(openssl s_client -connect $SERVER:443 -cipher $c -$v < /dev/null 2>&1 | sed 's/New, TLSv1\/SSLv3, //g')
        protocol=$(echo $result | grep Protocol | sed -e 's/^[[:space:]]*//')
        cipher=$(echo $result | grep Cipher | head -n1 | grep -v NONE | grep -v '0000' | sed -e 's/^[[:space:]]*//')
        if [[ !  -z  $cipher ]]
            then echo "$protocol $cipher"
        fi
    done
done

This works on zshell zsh on MacOS 11 - last tested 2020 November 16th