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TLS Testing Resources

This page lists correctness and safety testing resources for TLS implementations and related software dependencies. It excludes implementation-specific tests.

Note that there is no official conformance test suite.

  • badssl - Insecure and uncommon server configurations
  • BoGo - Test harness for (D)TLS, supported by BoringSSL and NSS. See for information about supporting other implementations.
  • TLS Attacker - TLS-Attacker is a Java-based framework for analyzing TLS libraries.
  • tlsfuzzer - Fuzzer and test suite for TLS (SSLv2, SSLv3, v1.0, v1.1, v1.2, v1.3) implementations.
  • Frankencerts - Specially crafted certificates for testing certificate validation code in TLS implementations.

The following tools lists may help identify features or properties of different TLS implementations: