bobbyiliev / bash-ssl-checker-tool Goto Github PK

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.

License: MIT License

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bash-ssl-checker-tool's Introduction

bash-ssl-checker-tool

Very simple bash script which 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.

The script has been tested on CentOS, Ubuntu, Mint and Debian.

The script provides you with the following information:

The domain name that the SSL certificate has been issued for
The number of days the SSL certificate expires in:
The dates when the certificate was issued on and expires on
The certificate has been issued by:
Supported TLS versions
Certificate Fingerprint

Usage:

In order to use the script just download the ssl file, make it executable and run it:

wget https://raw.githubusercontent.com/bobbyiliev/bash-ssl-checker-tool/master/ssl
chmod +x ssl
./ssl yourdomain.com

Output:

The output that you would get will look like this:

The bobbyiliev.com domain name seems valid

# The SSL certificate has been issued for:
Domain: CN = bobbyiliev.com
----

# The SSL certificate expires in:
90 days
----

# Dates:
Issued On: Jun  4 09:05:19 2020 GMT
Expires On: Sep  2 09:05:19 2020 GMT
----

# The certificate has been issued by:
Issuer: C = US, O = Let's Encrypt, CN = Let's Encrypt Authority X3
----

# TLS supported:
|   TLSv1.0:
|   TLSv1.1:
|   TLSv1.2:
----

# Fingerprint:
SHA1 Fingerprint=C1:E1:6C:46:8A:74:94:14:00:94:88:B9:4B:2B:C5:90:79:DE:72:64
----

Note: You need to have 'openssl' installed.

Blog post: https://bobbyiliev.com/blog/ssl-checker-terminal-tool

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bash-ssl-checker-tool's Issues

Won't loop?

Hi Bobby - this is a great tool - I've also been using a tool called 'aha' to output it to a html page for our teams here to look at

One thing I found though is that it appears impossible to use 'ssl' in a Bash loop?

I was planning on having a list of sites a script would run through... for example a ssl.list file with contents like...

www.microsoft.com
www.google.com

I've tried many loops and tests, but the loop seems to give up after the first invocation of the ssl command

Here are the contents of my /sslchecker folder

ls -la /sslchecker
total 24
drwxr-xr-x  2 root root 4096 Nov 24 13:10 .
drwxr-xr-x 25 root root 4096 Nov 24 13:10 ..
-rwxr-xr--  1 root root 4874 Nov 24 13:10 ssl
-rw-r--r--  1 root root   61 Nov 24 13:10 ssl.list
-rwxr-xr--  1 root root  505 Nov 24 13:10 ssl_checker.sh

The ssl.list file

www.microsoft.com
www.google.com

The ssl_checker.sh script

#! /bin/bash
cat /sslchecker/ssl.list | while read websiteurl
do
        echo loop start for $websiteurl
        /sslchecker/ssl $websiteurl
        echo loop end for $websiteurl
done

This will only do the first websitrurl - being www.microsoft.com and then the loop ends

Commenting out the ssl command - .e.g.

#! /bin/bash
cat /sslchecker/ssl.list | while read websiteurl
do
        echo loop start for $websiteurl
        #/sslchecker/ssl $websiteurl
        echo loop end for $websiteurl
done

...reads...

loop start for www.microsoft.com
loop end for www.microsoft.com
loop start for www.google.com
loop end for www.google.com

Thanks

Neil

bobbyiliev / bash-ssl-checker-tool Goto Github PK

bash-ssl-checker-tool's Introduction

bash-ssl-checker-tool

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bash-ssl-checker-tool's Issues

Won't loop?

Please add LICENSE file

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