# mozilla/cipherscan

A very simple way to find out which SSL ciphersuites are supported by a target.

Repository: https://github.com/mozilla/cipherscan
Canonical: https://ross.abutalabs.com/products/cipherscan
Language: Python
License: MPL-2.0
License Family: copyleft
Last push: 2025-06-09T16:21:03+00:00

## Health v2 (maintenance only)
Score: 44/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 25, release rhythm 35, longevity 100
- inputs: {"age_days": 4795, "days_push": 450, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1994, forks 266 (observed 2026-08-28T04:06:03.338032+00:00)

## What it is
Cipherscan is a command-line tool that tests which SSL/TLS ciphersuites a target server supports and in what order, wrapping the openssl s_client command. It also extracts certificate details, TLS options, and OCSP stapling information.

## Use cases
- audit which ssl ciphers a server supports
- check tls cipher ordering on a domain
- find weak or deprecated ciphersuites on a server
- test starttls services like xmpp for cipher support
- extract certificate and ocsp stapling info from a tls endpoint
- verify server tls configuration against best practices

## When to choose
- you need a quick unix command-line scan of a target's TLS ciphers
- you want cipher ordering and certificate details without a full scanner
- you need to test STARTTLS protocols like xmpp or smtp

## When to avoid
- you need a full vulnerability scanner with CVE detection
- you want a GUI or continuous TLS monitoring dashboard
- you are on Windows without a unix-like environment

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: security, vulnerability-scanning, cli
- domain: security, developer-tools, networking
- platform: cli
- tags: tls, ssl, ciphersuites, openssl, penetration-testing, network-scanning, linux, macos

## Member repositories
- mozilla/cipherscan (main) score 44

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:03.338032+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:02:32.610156+00:00, confidence not recorded.
  - readme: https://github.com/mozilla/cipherscan (fetched 2026-08-28T04:06:03.338032+00:00, sha 8bf35122d81e)
- Data as of 2026-08-30T08:39:29.467469+00:00.