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Wednesday, March 23, 2016

Fast And Full-Featured SSL Scanner - SSLyze







SSLyze is a Python tool that can analyze the SSL configuration of a server by connecting to it. It is designed to be fast and comprehensive, and should help organizations and testers identify mis-configurations affecting their SSL servers.
Key features include:
  • Multi-processed and multi-threaded scanning: it's very fast.
  • Support for all SSL protocols, from SSL 2.0 to TLS 1.2.
  • NEW: SSLyze can also be used as a library, in order to run scans and process the results directly from Python.
  • Performance testing: session resumption and TLS tickets support.
  • Security testing: weak cipher suites, insecure renegotiation, CRIME, Heartbleed and more.
  • Server certificate validation and revocation checking through OCSP stapling.
  • Support for StartTLS handshakes on SMTP, XMPP, LDAP, POP, IMAP, RDP, PostGres and FTP.
  • Support for client certificates when scanning servers that perform mutual authentication.
  • Scan results can be written to an XML or JSON file for further processing.
  • And much more !

Getting Started

SSLyze can be installed directly via pip:


pip install sslyze

It is also easy to directly clone the repository and the fetch the requirements:


git clone https://github.com/nabla-c0d3/sslyze.git
cd sslyze
pip install -r requirements.txt --target ./lib

Then, the command line tool can be used to scan servers:


python sslyze_cli.py --regular www.yahoo.com:443 www.google.com

SSLyze has been tested on the following platforms: Windows 7 (32 and 64 bits), Debian 7 (32 and 64 bits), OS X El Capitan.


Usage as a library

Starting with version 0.13.0, SSLyze can be used as a Python module in order to run scans and process the results directly in Python:


# Script to get the list of SSLv3 cipher suites supported by smtp.gmail.com
hostname = 'smtp.gmail.com'
try:
# First we must ensure that the server is reachable
server_info = ServerConnectivityInfo(hostname=hostname, port=587,
tls_wrapped_protocol=TlsWrappedProtocolEnum.STARTTLS_SMTP)
server_info.test_connectivity_to_server()
except ServerConnectivityError as e:
raise RuntimeError('Error when connecting to {}: {}'.format(hostname, e.error_msg))

# Get the list of available plugins
sslyze_plugins = PluginsFinder()

# Create a process pool to run scanning commands concurrently
plugins_process_pool = PluginsProcessPool(sslyze_plugins)

# Queue a scan command to get the server's certificate
plugins_process_pool.queue_plugin_task(server_info, 'sslv3')

# Process the result and print the certificate CN
for plugin_result in plugins_process_pool.get_results():
if plugin_result.plugin_command == 'sslv3':
# Do something with the result
print 'SSLV3 cipher suites'
for cipher in plugin_result.accepted_cipher_list:
print ' {}'.format(cipher.name)


The scan commands are same as the ones described in the sslyze_cly.py --help text.
They will all be run concurrently using Python's multiprocessing module. Each command will return a PluginResult object with attributes that contain the result of the scan command run on the server (such as list of supported cipher suites for the --tlsv1 command). These attributes are specific to each plugin and command but are all documented (within each plugin's module).
See api_sample.py for more examples of SSLyze's Python API.


Windows executable

A pre-compiled Windows executable is available in the Releases tab. The package can also be generated by running the following command:


python.exe setup_py2exe.py py2exe



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