Some minor output updates
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Bobby Iliev
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README.md
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README.md
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# bash-ssl-checker-tool
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This is a very simple bash script that you could use to gain general information for the SSL certificate of a certain domain name. It is based on the functionality of the popular https://sslshopper.com website, but it's a command line tool.
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Very simple bash script which you could use to gain general information for the SSL certificate of a certain domain name.
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It is based on the functionality of the popular https://sslshopper.com website, but it's a command line tool.
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The script has been tested on CentOS, Ubuntu, Mint and Debian.
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The script provides you with the following information:
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* The domain name that the SSL certificate has been issued for
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* The number of days the SSL certificate expires in:
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* The dates when the certificate was issued on and expieres on
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* The certificate has been issued by:
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* Supported TLS versions
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* Certificate Fingerprint
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Usage:
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In order to use the script just download the ssl file, make it executable and run it:
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```
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wget https://raw.githubusercontent.com/bobbyiliev/bash-ssl-checker-tool/master/ssl
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chmod +x ssl
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./ssl yourdomain.com
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```
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Output:
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The output that you would get will look like this:
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```
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The bobbyiliev.com domain name seems valid
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# The SSL certificate has been issued for:
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Domain: CN = bobbyiliev.com
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----
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# The SSL certificate expires in:
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90 days
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----
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# Dates:
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Issued On: Jun 4 09:05:19 2020 GMT
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Expires On: Sep 2 09:05:19 2020 GMT
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----
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# The certificate has been issued by:
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Issuer: C = US, O = Let's Encrypt, CN = Let's Encrypt Authority X3
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----
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# TLS supported:
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| TLSv1.0:
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| TLSv1.1:
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| TLSv1.2:
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----
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# Fingerprint:
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SHA1 Fingerprint=C1:E1:6C:46:8A:74:94:14:00:94:88:B9:4B:2B:C5:90:79:DE:72:64
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----
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```
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Note: You need to have 'openssl' installed.
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92
ssl
92
ssl
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#!/bin/bash
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# Gain some basic information about your SSL certificate
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##
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# Script which let's you gather some basic information about your SSL certificate
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##
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# Make sure that you have openssl installed
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##
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# Colors
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##
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green='\e[32m'
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blue='\e[34m'
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clear='\e[0m'
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orange='\e[33m'
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red='\e[31m'
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# Check if there is an input
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if [[ $1 ]]; then
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validation=$(host $1)
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##
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# Color Functions
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##
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ColorGreen(){
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echo -ne $green$1$clear
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}
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ColorBlue(){
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echo -ne $blue$1$clear
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}
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ColorRed(){
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echo -ne $red$1$clear
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}
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ColorOrange(){
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echo -ne $orange$1$clear
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}
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##
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# Make sure that openssl is installed
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##
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if ! [ -x "$(command -v openssl)" ] ; then
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echo "The openssl command is required! Please install it and then try again"
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exit 1
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fi
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# Check if domain is valid
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if [[ $validation == *"NXDOMAIN"* ]]; then
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echo "Please enter a valid domain";
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exit 0
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##
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# Check if there is an input
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##
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if [[ $1 ]]; then
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host $1 > /dev/null
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if [ $? -eq 0 ]; then
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echo -ne "The $(ColorGreen $1 ) domain name seems valid
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"
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else
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echo -ne "Could not resolve the $(ColorGreen ${1}) domain name...
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"
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exit 1
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fi
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fi
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case $1 in
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# Sample Usage
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# Usage example
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help)
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echo "Usage:
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ssl domain.com"
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echo -ne "Usage:
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$(ColorGreen './ssl domain.com')
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"
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exit 1
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;;
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"")
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echo "Usage:
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ssl domain.com"
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echo -ne "Usage:
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$(ColorGreen './ssl domain.com')
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"
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exit 1
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;;
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# If the domain is valid run the following:
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*)
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today=$(date +%F)
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expires=$(echo | openssl s_client -servername $1 -connect $1:443 2>/dev/null | openssl x509 -noout -dates | grep 'notAfter' | sed 's/notAfter=//')
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#echo | openssl s_client -servername $1 -connect $1:443 2>/dev/null | openssl x509 -noout -dates
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echo '# The SSL certificate has been issued for: '
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echo -ne "$(ColorRed '#') $(ColorGreen 'The SSL certificate has been issued for:')"
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echo ''
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echo | openssl s_client -servername $1 -connect $1:443 2>/dev/null | openssl x509 -noout -subject | sed 's/subject=/Domain: /'
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#echo | openssl s_client -servername www.$1 -connect www.$1:443 2>/dev/null | openssl x509 -noout -subject
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echo '----'
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echo ''
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echo '# The SSL certificate expires in: '
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echo -ne "$(ColorRed '#') $(ColorGreen 'The SSL certificate expires in:')"
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echo ''
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echo $(( ( $(date -ud "$expires" +'%s') - $(date -ud "$today" +'%s') )/60/60/24 )) days
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echo '----'
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echo ''
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echo '# Dates: '
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echo -ne "$(ColorRed '#') $(ColorGreen 'Dates:')"
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echo ''
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echo | openssl s_client -servername $1 -connect $1:443 2>/dev/null | openssl x509 -noout -dates | sed 's/notAfter=/Expires On: /' | sed 's/notBefore=/Issued On: /'
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echo '----'
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echo ''
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echo '# The certificate has been issued by: '
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echo -ne "$(ColorRed '#') $(ColorGreen 'The certificate has been issued by:')"
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echo ''
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echo | openssl s_client -servername $1 -connect $1:443 2>/dev/null | openssl x509 -noout -issuer | sed 's/issuer=/Issuer: /'
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echo '----'
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echo ''
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echo '# TLS supported: '
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echo -ne "$(ColorRed '#') $(ColorGreen 'TLS supported:')"
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echo ''
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nmap --script ssl-enum-ciphers -p 443 $1 | grep ':' | grep -i tls
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echo '----'
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echo ''
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echo '# Fingerprint: '
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echo -ne "$(ColorRed '#') $(ColorGreen 'Fingerprint:')"
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echo ''
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echo | openssl s_client -servername $1 -connect $1:443 2>/dev/null | openssl x509 -noout -fingerprint
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echo '----'
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#echo ''
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#echo '##### Decode: '
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#echo -ne "$(ColorRed '#') $(ColorGreen 'Decode')"
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#echo ''
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#echo | openssl s_client -servername $1 -connect $1:443 2>/dev/null | openssl x509 -noout -text
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#echo '#################'
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