ERR_remove_thread_state() was deprecated in OpenSSL 1.1.0 when the thread handling functionality was entirely rewritten.ĬRYPTO_cleanup_all_ex_data and ERR_remove_state should be called on each thread, and not just the main thread. Note: ERR_remove_state() was deprecated in OpenSSL 1.0.0 when ERR_remove_thread_state() was introduced. To cleanup the library the library call the following functions: OpenSSL does not provide a SSL_library_uninit or SSL_library_cleanup function (also see Issue #3824, FEATURE: Please provide a function to unintialize the library). Its often in the context of running a program under a memory checker like Valgrind. How to cleanup the library arises on occasion. If(!(eng->flags & ENGINE_FLAGS_NO_REGISTER_ALL))ĮNGINE_register_complete(eng) Cleanup See eng_all.c, eng_fat.c, and engine(3) for details. Incumbent functionality is determined by the manufacturer and includes includes RSA, DSA, DH, ECDH, MD, and RAND operations. If you want an engine to provide all incumbent functionality for the OpenSSL library, then then call ENGINE_register_complete after loading the engine. Rc = ENGINE_set_default(eng, ENGINE_METHOD_RAND) For example, the following loads the rdrand engine provided for some Intel CPUs. eng_all.c lists the built-in engines you can load. You can also load a particular engine if you know what you want to use. You should not depend on library behavior, so you should call OPENSSL_config or ENGINE_load_builtin_engines if you need engines. If your application needs to use engines, then it should either call call ENGINE_load_builtin_engines or OPENSSL_config to load the built-in engines (including dynamically configured engines from openssl.cnf).Įngines are are automatically loaded (or not loaded) based on the definition of OPENSSL_LOAD_CONF (or lack of definition). The library may have called OPENSSL_config for you. If you don't need something from openssl.cnf (or its mucking up you program), then call OPENSSL_noconfig.Don't depend on the library to do it for you.
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