checkssl

About

checkssl is a small SSL expiration tool.

Install

Build from source:

go install gitlab.com/ngerakines/checkssl

Install from source

Usage

$ checkssl -h
Usage of checkssl:
  -host string
    	The server to connect to. (default "ngerakines.me")
  -port string
    	The port to connect to. (default "443")

Example

$ ./checkssl
HOST ngerakines.me
PORT 443
RESOLVED 104.248.63.231
FINGERPRINT d0a9bc653dd3b0b880fde14d49dee81f056cea0c8037452f8fcc53136e3d9650
NAME *.ngerakines.me

Docker

checkssl can be included in your docker tool container.

FROM ubuntu:20.04
WORKDIR /
RUN apt-get update; apt-get install -y unzip wget
RUN mkdir /checkssl-tmp/ && cd /checkssl-tmp/ \
    && wget -q https://gitlab.com/ngerakines/checkssl/uploads/efed32dde4591745025865b2f687d8e8/checkssl_1.0.0_linux_amd64.zip \
    && echo "2f32b9d9b1eb69d8c4229792d2b2daa1b7bb67745c96e2ce07b3f0e6f2254443  /checkssl-tmp/checkssl_1.0.0_linux_amd64.zip" > checksum \
    && sha256sum -c checksum \
    && unzip -qq checkssl_1.0.0_linux_amd64.zip -d ./ \
    && mv /checkssl-tmp/checkssl /usr/local/bin
CMD [ "checkssl" ]

In the above Dockerfile, checkssl is downloaded, verified, and placed /usr/local/bin/

$ docker build .
Sending build context to Docker daemon  2.127MB
Step 1/5 : FROM ubuntu:20.04
 ---> 1d622ef86b13
Step 2/5 : WORKDIR /
 ---> Using cache
 ---> 85cb82d2e410
Step 3/5 : RUN apt-get update; apt-get install -y unzip wget
 ---> Using cache
 ---> aa2e975dc8ff
Step 4/5 : RUN mkdir /checkssl-tmp/ && cd /checkssl-tmp/     && wget -q https://gitlab.com/ngerakines/checkssl/uploads/efed32dde4591745025865b2f687d8e8/checkssl_1.0.0_linux_amd64.zip     && echo "2f32b9d9b1eb69d8c4229792d2b2daa1b7bb67745c96e2ce07b3f0e6f2254443  /checkssl-tmp/checkssl_1.0.0_linux_amd64.zip" > checksum     && sha256sum -c checksum     && unzip -qq checkssl_1.0.0_linux_amd64.zip -d ./     && mv /checkssl-tmp/checkssl /usr/local/bin
 ---> Running in 9d5ac71caa78
/checkssl-tmp/checkssl_1.0.0_linux_amd64.zip: OK
Removing intermediate container 9d5ac71caa78
 ---> 89cc3ee603df
Step 5/5 : CMD [ "checkssl" ]
 ---> Running in b7d25454d61a
Removing intermediate container b7d25454d61a
 ---> 32ff8f595211
Successfully built 32ff8f595211

The container can then be executed.

$ docker run 32ff8f595211
HOST ngerakines.me
PORT 443
RESOLVED 192.81.212.192
FINGERPRINT d0a9bc653dd3b0b880fde14d49dee81f056cea0c8037452f8fcc53136e3d9650
NAME *.ngerakines.me