.\" $OpenBSD: OpenSSL_add_all_algorithms.3,v 1.16 2024/03/04 19:04:47 tb Exp $ .\" full merge up to: OpenSSL b3696a55 Sep 2 09:35:50 2017 -0400 .\" .\" This file was written by Dr. Stephen Henson . .\" Copyright (c) 2000, 2003, 2013 The OpenSSL Project. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in .\" the documentation and/or other materials provided with the .\" distribution. .\" .\" 3. 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IN NO EVENT SHALL THE OpenSSL PROJECT OR .\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, .\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; .\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, .\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED .\" OF THE POSSIBILITY OF SUCH DAMAGE. .\" .Dd $Mdocdate: March 4 2024 $ .Dt OPENSSL_ADD_ALL_ALGORITHMS 3 .Os .Sh NAME .Nm OpenSSL_add_all_algorithms , .Nm OpenSSL_add_all_ciphers , .Nm OpenSSL_add_all_digests , .Nm EVP_cleanup , .Nm SSLeay_add_all_algorithms .\" .Nm OPENSSL_add_all_algorithms_conf , .\" .Nm OPENSSL_add_all_algorithms_noconf , .\" .Nm SSLeay_add_all_ciphers , and .\" .Nm SSLeay_add_all_digests are intentionally undocumented .\" because they are unused aliases. .Nd add algorithms to internal table .Sh SYNOPSIS .In openssl/evp.h .Ft void .Fn OpenSSL_add_all_algorithms void .Ft void .Fn OpenSSL_add_all_ciphers void .Ft void .Fn OpenSSL_add_all_digests void .Ft void .Fn EVP_cleanup void .Ft void .Fn SSLeay_add_all_algorithms void .Sh DESCRIPTION These functions are deprecated. It is never useful for any application program to call any of them explicitly. The library automatically calls them internally whenever needed. .Pp OpenSSL keeps an internal table of digest algorithms and ciphers. It uses this table to look up ciphers via functions such as .Xr EVP_get_cipherbyname 3 . .Pp .Fn OpenSSL_add_all_algorithms adds all algorithms to the table (digests and ciphers). If an application is compiled with the preprocessor symbol .Dv OPENSSL_LOAD_CONF #define'd, it also calls .Xr OPENSSL_config 3 with a .Dv NULL argument, loading the default configuration file. .Pp .Fn OpenSSL_add_all_digests adds all digest algorithms to the table. .Pp .Fn OpenSSL_add_all_ciphers adds all encryption algorithms to the table including password based encryption algorithms. .Pp If any of the above functions is called more than once, only the first call has an effect. .Pp .Fn EVP_cleanup removes all ciphers and digests from the table and also calls .Xr OBJ_NAME_cleanup 3 with an argument of \-1 , thus resetting the global associative array of names and all signature algorithm definitions to their default states, removing all application-defined types, key-value pairs, and aliases, including any that are unrelated to the EVP library. .Pp .Fn SSLeay_add_all_algorithms is a deprecated alias for .Fn OpenSSL_add_all_algorithms . .Pp .Fn OpenSSL_add_all_algorithms and .Fn SSLeay_add_all_algorithms are implemented as macros. .Sh SEE ALSO .Xr evp 3 , .Xr EVP_DigestInit 3 , .Xr EVP_EncryptInit 3 , .Xr OBJ_cleanup 3 , .Xr OBJ_NAME_add 3 , .Xr OPENSSL_config 3 .Sh HISTORY .Fn EVP_cleanup , .Fn SSLeay_add_all_algorithms , and precursor functions .Fn SSLeay_add_all_ciphers and .Fn SSLeay_add_all_digests first appeared in SSLeay 0.8.0 and have been available since .Ox 2.4 . .Pp .Fn OpenSSL_add_all_algorithms , .Fn OpenSSL_add_all_ciphers , and .Fn OpenSSL_add_all_digests first appeared in OpenSSL 0.9.5 and have been available since .Ox 2.7 . .Sh BUGS Although the functions do not return error codes, it is possible for them to fail. This will only happen as a result of a memory allocation failure so this is not too much of a problem in practice.