The ncrypto library extracts the base internal implementation of Node.js crypto operations that support both node:crypto and Web Crypto implementations and makes them available for use in other projects that need to emulate Node.js' behavior.

• Build systems: ncrypto can be built with either Bazel or CMake.
• SSL libraries: ncrypto supports linking to either boringssl or openssl.

• Bazel: --@ncrypto//:bssl_libdecrepit_missing=True
• CMake: -DNCRYPTO_BSSL_LIBDECREPIT_MISSING=1

If linking against boringssl, libdecrepit is an optional component that isn't always built. If this option is set, ncrypto will use a built-in replacement for the missing functions.