command line tool to check if a webserver has a valid https certificate.
checkssl steve.zazeski.com
steve.zazeski.com
-> openresty -
-> HTTP/2 with TLS v1.3 (released 2018) - latest version
-> TLS_AES_128_GCM_SHA256 = TLS, message encrypted with AES128 GCM, hashes are SHA256
1) steve.zazeski.com expires on 2022-02-13 12:32AM Sun (44.8 days)
CA-2) R3 expires on 2025-09-15 4:00PM Mon (1355.5 days)
CA-3) ISRG Root X1 expires on 2035-06-04 11:04AM Mon (4904.3 days)
[PASS] https://steve.zazeski.com
If the certificate is not valid, a non-zero exit code will be returned to stop a ci build.
expired.badssl.com
-> nginx/1.10.3 (Ubuntu) -
-> HTTP/1.1 (OLD) with TLS v1.2 (released 2008) - Consider upgrading to TLS v1.3
-> TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
1) *.badssl.com expired on 2015-04-12 11:59PM Sun (-2621.0 days)
CA-2) COMODO RSA Domain Validation Secure Server CA expires on 2029-02-11 11:59PM Sun (2433.0 days)
CA-3) COMODO RSA Certification Authority expired on 2020-05-30 10:48AM Sat (-746.6 days)
https://expired.badssl.com x509: certificate has expired or is not yet valid: current time 2022-06-15T19:48:19-05:00 is after 2015-04-12T23:59:59Z
[FAIL] https://expired.badssl.com
ebay.com
stopped after 10 redirects
[FAIL] https://ebay.com
(You can use - or -- for all parameters)
-days=60 allows you to specify a threshold of when checkssl should error to allow CI jobs to fail if the certs are about to expire in a few days.
-json will switch the text output from human-readable to JSON format for easier parsing with other systems.
-csv will switch the text output to comma seperated values that are easier to copy and paste into a spreadsheet.
-no-color will not add terminal color syntax to output, helpful for CI systems that do not have color enabled.
-no-output will not show any text but still return a status code. Helpful for CI that just want to know if the certs are valid.
-short will reduce each target's output to just the pass/fail line with the url/dns.
0 All certificates passed
2 Certificate(s) are expired
3 Certificate(s) are valid now but user specified threshold failed (from -days flag)
4 Certificate(s) are not yet valid
5 General error, normally due to network failure
wget https://github.com/szazeski/checkssl/releases/download/v0.5.1/checkssl_0.5.1_$(uname -s)_$(uname -m).tar.gz -O checkssl.tar.gz && tar -xf checkssl.tar.gz && chmod +x checkssl && sudo mv checkssl /usr/bin/
Dockerhub docker run --rm szazeski/checkssl hub.docker.com
macports sudo port install checkssl
homebrew brew install szazeski/tap/checkssl
Invoke-WebRequest https://github.com/szazeski/checkssl/releases/download/v0.5.1/checkssl_0.5.1_Windows_x86_64.tar.gz -outfile checkssl.tar.gz; tar -xzf checkssl.tar.gz; echo "if you want, move the file to a PATH directory like WINDOWS folder"
then move to C:\Windows\ or other PATH directory