1.\" $OpenBSD: OpenSSL_add_all_algorithms.3,v 1.16 2024/03/04 19:04:47 tb Exp $ 2.\" full merge up to: OpenSSL b3696a55 Sep 2 09:35:50 2017 -0400 3.\" 4.\" This file was written by Dr. Stephen Henson <steve@openssl.org>. 5.\" Copyright (c) 2000, 2003, 2013 The OpenSSL Project. All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in 16.\" the documentation and/or other materials provided with the 17.\" distribution. 18.\" 19.\" 3. All advertising materials mentioning features or use of this 20.\" software must display the following acknowledgment: 21.\" "This product includes software developed by the OpenSSL Project 22.\" for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 23.\" 24.\" 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 25.\" endorse or promote products derived from this software without 26.\" prior written permission. For written permission, please contact 27.\" openssl-core@openssl.org. 28.\" 29.\" 5. Products derived from this software may not be called "OpenSSL" 30.\" nor may "OpenSSL" appear in their names without prior written 31.\" permission of the OpenSSL Project. 32.\" 33.\" 6. Redistributions of any form whatsoever must retain the following 34.\" acknowledgment: 35.\" "This product includes software developed by the OpenSSL Project 36.\" for use in the OpenSSL Toolkit (http://www.openssl.org/)" 37.\" 38.\" THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 39.\" EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 40.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 41.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 42.\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 43.\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 44.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 45.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 46.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 47.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 48.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 49.\" OF THE POSSIBILITY OF SUCH DAMAGE. 50.\" 51.Dd $Mdocdate: March 4 2024 $ 52.Dt OPENSSL_ADD_ALL_ALGORITHMS 3 53.Os 54.Sh NAME 55.Nm OpenSSL_add_all_algorithms , 56.Nm OpenSSL_add_all_ciphers , 57.Nm OpenSSL_add_all_digests , 58.Nm EVP_cleanup , 59.Nm SSLeay_add_all_algorithms 60.\" .Nm OPENSSL_add_all_algorithms_conf , 61.\" .Nm OPENSSL_add_all_algorithms_noconf , 62.\" .Nm SSLeay_add_all_ciphers , and 63.\" .Nm SSLeay_add_all_digests are intentionally undocumented 64.\" because they are unused aliases. 65.Nd add algorithms to internal table 66.Sh SYNOPSIS 67.In openssl/evp.h 68.Ft void 69.Fn OpenSSL_add_all_algorithms void 70.Ft void 71.Fn OpenSSL_add_all_ciphers void 72.Ft void 73.Fn OpenSSL_add_all_digests void 74.Ft void 75.Fn EVP_cleanup void 76.Ft void 77.Fn SSLeay_add_all_algorithms void 78.Sh DESCRIPTION 79These functions are deprecated. 80It is never useful for any application program 81to call any of them explicitly. 82The library automatically calls them internally whenever needed. 83.Pp 84OpenSSL keeps an internal table of digest algorithms and ciphers. 85It uses this table to look up ciphers via functions such as 86.Xr EVP_get_cipherbyname 3 . 87.Pp 88.Fn OpenSSL_add_all_algorithms 89adds all algorithms to the table (digests and ciphers). 90If an application is compiled with the preprocessor symbol 91.Dv OPENSSL_LOAD_CONF 92#define'd, it also calls 93.Xr OPENSSL_config 3 94with a 95.Dv NULL 96argument, loading the default configuration file. 97.Pp 98.Fn OpenSSL_add_all_digests 99adds all digest algorithms to the table. 100.Pp 101.Fn OpenSSL_add_all_ciphers 102adds all encryption algorithms to the table including password based 103encryption algorithms. 104.Pp 105If any of the above functions is called more than once, 106only the first call has an effect. 107.Pp 108.Fn EVP_cleanup 109removes all ciphers and digests from the table and also calls 110.Xr OBJ_NAME_cleanup 3 111with an argument of \-1 , 112thus resetting the global associative array of names 113and all signature algorithm definitions to their default states, 114removing all application-defined types, key-value pairs, and aliases, 115including any that are unrelated to the EVP library. 116.Pp 117.Fn SSLeay_add_all_algorithms 118is a deprecated alias for 119.Fn OpenSSL_add_all_algorithms . 120.Pp 121.Fn OpenSSL_add_all_algorithms 122and 123.Fn SSLeay_add_all_algorithms 124are implemented as macros. 125.Sh SEE ALSO 126.Xr evp 3 , 127.Xr EVP_DigestInit 3 , 128.Xr EVP_EncryptInit 3 , 129.Xr OBJ_cleanup 3 , 130.Xr OBJ_NAME_add 3 , 131.Xr OPENSSL_config 3 132.Sh HISTORY 133.Fn EVP_cleanup , 134.Fn SSLeay_add_all_algorithms , 135and precursor functions 136.Fn SSLeay_add_all_ciphers 137and 138.Fn SSLeay_add_all_digests 139first appeared in SSLeay 0.8.0 and have been available since 140.Ox 2.4 . 141.Pp 142.Fn OpenSSL_add_all_algorithms , 143.Fn OpenSSL_add_all_ciphers , 144and 145.Fn OpenSSL_add_all_digests 146first appeared in OpenSSL 0.9.5 and have been available since 147.Ox 2.7 . 148.Sh BUGS 149Although the functions do not return error codes, it is possible for them 150to fail. 151This will only happen as a result of a memory allocation failure so this 152is not too much of a problem in practice. 153