ssldump - (de-facto repository gathering patches around the cyberspace)

Release and tagging

• Current version of ssldump is v1.9 (released: 2024-11-03) - ChangeLog

What about the original ssldump?

This repository is composed of the original SSLDUMP 0.9b3 + a myriad of patches (from Debian and other distributions) + contributions via PR

ssldump is an SSLv3/TLS network protocol analyzer. It identifies TCP connections on the chosen network interface and attempts to interpret them as SSLv3/TLS traffic. When it identifies SSLv3/TLS traffic, it decodes the records and displays them in a textual form to stdout. If provided with the appropriate keying material, it will also decrypt the connections and display the application data traffic. It also includes a JSON output option, supports JA3 and IPv6.

How to do I run ssldump?

./ssldump -j -ANH -n -i any | jq will run ssldump on all interfaces and output the result in JSON format including ja3 hashes.

For more details, check the man page.

How can I lookup ja3 hashes?

This example will query ja3er.com service to display the known ja3 hashes from the TLS handshaked in the pcap.

./ssldump -r yourcapture.pcap -j | jq -r 'select(.ja3_fp != null) | .ja3_fp' | parallel 'curl -s -X GET 'https://ja3er.com/search/{}' | jq .'

Why do you maintain this repository?

Because it's a mess. The software maintenance process for old free (unmaintained) software like ssldump is a complete chaotic process. I do this to ease my pain and this could help other too (but this is just a collateral damage).

Where ssldump is used?

• I used it for a relatively small project called Passive SSL. For more information, Passive SSL Passive Detection and Reconnaissance Techniques, to Find, Track, and Attribute Vulnerable ”Devices”. Additional back-end code available is in the crl-monitor repository.
• ssldump is used in the D4-Project.

Where ssldump is available?

• Alpine Linux ssldump
• Arch Linux ssldump
• CentOS, RHEL, Rocky (via EPEL) ssldump
• Debian ssldump
• Fedora ssldump
• Kali Linux ssldump
• Ubuntu Linux ssldump

Build instructions

Install dependencies on Debian & Ubuntu (as root):

apt install build-essential git cmake ninja-build libssl-dev libpcap-dev libnet1-dev libjson-c-dev

On Fedora, CentOS, RHEL & Rocky (as root):

dnf install git cmake ninja-build gcc openssl-devel libpcap-devel libnet-devel json-c-devel

On OpenBSD (as root):

pkg_add git cmake ninja json-c libnet

On FreeBSD (as root):

pkg install git cmake ninja json-c libnet

On MacOS (as root):

brew install cmake ninja openssl@3 libpcap libnet json-c

Compile & install:

git clone https://github.com/adulau/ssldump.git
cd ssldump
cmake -G Ninja -B build
ninja -C build
./build/ssldump -v
(optional, as root) ninja -C build install

Notes

The "save to pcap" (-w) option by @ryabkov, is heavily based on the work of @droe on https://github.com/droe/sslsplit .

Contributing

The contributing policy is simple. If you have a patch to propose, make a pull-request via the interface. If the patch works for me, it's merged.