Certificate Transparency alternatives

Looking for an alternative tool to replace Certificate Transparency? During the review of Certificate Transparency we looked at other open source tools. Based on their category, tags, and text, these are the ones that have the best match.

Top 3

  1. Lemur (certificate management)
  2. cipherscan (TLS/SSL cipher scanner)
  3. clinker (SSL/TLS auditing tool)

These tools are ranked as the best alternatives to Certificate Transparency.

Alternatives (by score)

89

Lemur

Introduction

With Lemur you can provide a central portal for developers and administrators to issue TLS certificates with predefined defaults.

Lemur works on CPython 3.5 and uses the Flask framework. Another component it uses is cryptography to handle the creation of the certificates.

Netflix develops on macOS and deploys on Ubuntu servers.

Project details

Lemur is written in Python.

Strengths and weaknesses

  • + More than 500 GitHub stars
  • + The source code of this software is available
  • + Supported by a large company

    Typical usage

    • Certificate management

    Lemur review

    64

    cipherscan

    Introduction

    The tool is of great assistance to quickly perform a security audit and may be used during penetrating testing, or guiding system administrator for system hardening.

    Project details

    cipherscan is written in Python, shell script.

    Strengths and weaknesses

    • + Screen output is colored
    • + More than 1000 GitHub stars
    • + Very low number of dependencies
    • + Supported by a large company

      Typical usage

      • Information gathering
      • Security assessment
      • System hardening
      • Web application analysis

      cipherscan review

      60

      clinker

      Introduction

      Clinker is a tool to test SSL and TLS security for Firefox. It is an addon that shows the used cipher suites, certificates, and shows related security information of the connection itself.

      Requirements: Firefox

      Project details

      56

      MassBleed

      Introduction

      MassBleed is a SSL vulnerability scanner to check for several known vulnerabilities and attacks like DROWN, POODLE, and ShellShock.

      Project details

      MassBleed is written in Perl, Python, shell script.

      Strengths and weaknesses

      • + The source code of this software is available
      • - Full name of author is unknown
      • - Unknown project license

      Typical usage

      • Application security
      • Web application analysis

      MassBleed review

      74

      O-Saft

      Introduction

      O-Saft is the abbreviation for OWASP SSL advanced forensic tool.

      Project details

      O-Saft is written in Perl.

      Strengths and weaknesses

      • + The source code of this software is available

        Typical usage

        • Information gathering
        • Penetration testing
        • Security assessment
        • Vulnerability scanning
        • Web application analysis

        O-Saft review

        97

        OpenSSL

        Introduction

        This popular toolkit is used by many systems. It provides options like encryption and hashing of data, integrity testing, and digital certificates and signatures. Many software applications use the toolkit to provide support for these functions. OpenSSL also has a client utility that can be used on the command line to test, decrypt and encrypt data, and create certificates.

        Project details

        OpenSSL is written in C.

        Strengths and weaknesses

        • + The source code of this software is available
        • + Well-known library
        • - Major vulnerabilities in the past

        Typical usage

        • Certificate management
        • Data encryption

        OpenSSL review

        63

        SSLMap

        Introduction

        SSLMap uses its own SSL engine to avoid any dependencies or limitations with pre-installed libraries.

        Project details

        74

        SSLsplit

        Introduction

        SSLsplit is a tool for man-in-the-middle attacks against SSL/TLS encrypted network connections. Connections are transparently intercepted through a network address translation engine and redirected to SSLsplit. SSLsplit terminates SSL/TLS and initiates a new SSL/TLS connection to the original destination address, while logging all data transmitted. SSLsplit is intended to be useful for network forensics and penetration testing.

        SSLsplit supports plain TCP, plain SSL, HTTP and HTTPS connections over both IPv4 and IPv6. For SSL and HTTPS connections, SSLsplit generates and signs forged X509v3 certificates on-the-fly, based on the original server certificate subject DN and subjectAltName extension. SSLsplit fully supports Server Name Indication (SNI) and is able to work with RSA, DSA and ECDSA keys and DHE and ECDHE cipher suites. Depending on the version of OpenSSL, SSLsplit supports SSL 3.0, TLS 1.0, TLS 1.1 and TLS 1.2, and optionally SSL 2.0 as well. SSLsplit can also use existing certificates of which the private key is available, instead of generating forged ones. SSLsplit supports NULL-prefix CN certificates and can deny OCSP requests in a generic way. For HTTP and HTTPS connections, SSLsplit removes response headers for HPKP in order to prevent public key pinning, for HSTS to allow the user to accept untrusted certificates, and Alternate Protocols to prevent switching to QUIC/SPDY. As an experimental feature, SSLsplit supports STARTTLS mechanisms in a generic manner.

        Project details

        SSLsplit is written in C.

        Strengths and weaknesses

        • + The source code of this software is available

          Typical usage

          • Learning
          • Network analysis
          • Penetration testing
          • Security assessment

          SSLsplit review

          84

          SSLyze

          Introduction

          SSLyze provides a library for scanning services that use SSL/TLS for encrypted communications. It can be used to test their implementation.

          Project details

          100

          mitmproxy (mitmproxy)

          Introduction

          The mitmproxy tool allows to intercept, inspect, modify, and replay traffic flows. It may be used for pentesting, troubleshooting, or learning about SSL/TLS.

          Project details

          mitmproxy is written in Python.

          Strengths and weaknesses

          • + More than 200 contributors
          • + More than 10000 GitHub stars
          • + The source code of this software is available

            Typical usage

            • Network analysis
            • Penetration testing
            • Security assessment

            mitmproxy review

            60

            pshtt

            Introduction

            Pshtt was developed to push organizations, including government departments, to adopt HTTPS across the enterprise.

            Project details

            pshtt is written in Python.

            Strengths and weaknesses

            • + More than 500 GitHub stars
            • + The source code of this software is available

              Typical usage

              • Security assessment
              • Web application analysis

              pshtt review

              60

              sslcaudit

              Introduction

              Sslcaudit is a tool that focuses on the niche of testing SSL/TLS clients.

              Project details

              sslcaudit is written in Python.

              Strengths and weaknesses

              • + The source code of this software is available

                Typical usage

                • Security assessment
                • Software testing

                sslcaudit review

                52

                ssldump

                Introduction

                ssldump is protocol analyzer for SSLv3/TLS network traffic. It identifies TCP connections on the chosen network interface and tries to interpret it.

                Project details

                Strengths and weaknesses

                • + The source code of this software is available
                • - No updates for a while

                Typical usage

                • Network analysis

                ssldump review

                97

                testssl.sh

                Introduction

                Key features of testssl.sh include:

                • Clear output: you can tell easily whether anything is good or bad
                • Ease of installation: It works for Linux, Darwin, FreeBSD, NetBSD and MSYS2/Cygwin out of the box: no need to install or configure something, no gems, CPAN, pip or the like.
                • Flexibility: You can test any SSL/TLS enabled and STARTTLS service, not only webservers at port 443
                • Toolbox: Several command line options help you to run YOUR test and configure YOUR output
                • Reliability: features are tested thoroughly
                • Verbosity: If a particular check cannot be performed because of a missing capability on your client side, you'll get a warning
                • Privacy: It's only you who sees the result, not a third party
                • Freedom: It's 100% open source. You can look at the code, see what's going on and you can change it.

                Project details

                testssl.sh is written in shell script.

                Strengths and weaknesses

                • + Used language is shell script
                • + The source code of this software is available

                  Typical usage

                  • Application testing
                  • Configuration audit

                  testssl.sh review

                  64

                  A2SV

                  Introduction

                  A2SV is short for Auto Scanning to SSL Vulnerability, a security tool to scan for SSL and TLS vulnerabilities. It can be used during security assessments.

                  Project details

                  A2SV is written in Python.

                  Strengths and weaknesses

                  • + The source code of this software is available
                  • - Full name of author is unknown

                  Typical usage

                  • Vulnerability scanning
                  • Vulnerability testing

                  A2SV review

                  70

                  sslh

                  Introduction

                  A typical use case for multiplexing is to allow serving several services on one port. Port 443 is commonly used, as that is typically opened on firewalls to allow HTTPS traffic. By multiplexing it, you can also use SSH or other services on the same port.

                  Project details

                  60

                  Certigo

                  Introduction

                  This toolkit is useful for automatic auditing certificates and retrieving information from them. It can be used for monitoring certificates. These certificates could be stored in a local file or remotely on a system. In the latter case, the tool will be able to connect to the system and retrieve the related information.

                  Project details

                  Certigo is written in Golang.

                  Strengths and weaknesses

                  • + The source code of this software is available

                    Typical usage

                    • Certificate management

                    Certigo review

                    60

                    sslmerge

                    Introduction

                    When using SSL Labs, you may have had chain anchor issues when verifying a website or web application. The sslmerge tool helps to merge the domain certificate, intermediate certificate, and root certificates.

                    Project details

                    sslmerge is written in shell script.

                    Strengths and weaknesses

                    • + Very low number of dependencies
                    • + The source code of this software is available

                      Typical usage

                      • Certificate management

                      sslmerge review

                      64

                      tls-ca-manage

                      Introduction

                      The tls-ca-manage is a certificate authority management tool written in shell script. It can be used to manage certificates for TLS/SSL configurations.

                      Project details

                      tls-ca-manage is written in shell script.

                      Strengths and weaknesses

                      • + Very low number of dependencies
                      • - Full name of author is unknown

                      Typical usage

                      • Certificate management

                      tls-ca-manage review

                      60

                      ZGrab

                      Introduction

                      ZGrab is a stateful application-layer scanner. It works together with ZMap and is also part of the ZMap project. ZGrab is written in Go and supports multiple protocols, including:

                      • BACNET
                      • HTTP
                      • HTTPS
                      • FTP
                      • IMAP
                      • POP3
                      • Modbus
                      • Siemens S7
                      • SMTP
                      • SSH
                      • Telnet
                      • Tridium Fox

                      Project details

                      ZGrab is written in Golang.

                      Strengths and weaknesses

                      • + The source code of this software is available

                        Typical usage

                        • Penetration testing
                        • Security assessment
                        • Vulnerability scanning

                        ZGrab review

                        60

                        tlsenum

                        Introduction

                        Tlsenum is a CLI tool to enumerate TLS protocol and TLS cipher support by a server. The tool lists then the output based on the order of priority. Tlsenum can be used to find the supported protocols and ciphers of a system and determine if it is properly hardened. This information can be useful to system administrators and pentesters doing a security assessment of the system.

                        Project details

                        tlsenum is written in Python.

                        Strengths and weaknesses

                        • + The source code of this software is available

                          Typical usage

                          • Information gathering
                          • Security assessment
                          • System enumeration
                          • System hardening

                          tlsenum review

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